REINFORCED FOAM BLOCK FOR SUPPORTING A PIPELINE

FIELD OF THE INVENTION

The present invention relates to a foam body which is reinforced by incorporation of another material in a manner providing support for a pipeline carrying oil or gas.

BACKGROUND

Foam blocks are employed in a variety of applications. The foam material forming the block is suitable for providing a cushioning effect; however, the foam material itself has limited strength, in part due to the material's characteristics which suitably provide the aforementioned cushioning effect.

SUMMARY OF THE INVENTION

It is an aspect of the invention to provide a device for supporting a length of pipe adapted to carry oil or gas in a subterranean environment, in combination with the length of pipe, the device comprising:

a body of rigid synthetic polymeric foam material;

the foam body defining an upper face arranged for substantially receiving a weight force of the length of pipe resting on the device and a lower face of the foam body arranged for resting on a ground surface;

the foam body having a thickness measured between the upper and lower faces suited for carrying a weight force of the length of pipe when carrying the oil or gas therein;

a planar sheet of reinforcing material having a peripheral edge delimiting a first face of the sheet and an opposite second face of the sheet;

the reinforcing sheet having a thickness measured between the first and second faces;

the reinforcing sheet being substantially incompressible across the thickness thereof;

the thickness of the reinforcing sheet being less than the thickness of the foam body;

the reinforcing sheet being connected to the foam body and located at or adjacent the upper face thereof; and

the reinforcing sheet being oriented in a plane which is transverse to a thickness direction of the foam body, the thickness direction being parallel to the thickness of the foam body, so that the reinforcing sheet is oriented substantially perpendicularly to the weight force of the length of pipe exerted on the foam body.

In this arrangement the reinforcing sheet acts to distribute the weight of the length of pipe, which is an external force acting on the foam body, across a width of the foam body as otherwise the weight force is substantially localized and is conducive to shearing the foam body along the thickness direction.

In one arrangement, the reinforcing sheet is flexible and porous so as to define a plurality of openings formed through the thickness of the sheet, and the reinforcing sheet is embedded in the foam body such that the foam material passes into the openings of the reinforcing sheet for interconnecting to the foam body.

In one such arrangement, the porous reinforcing sheet is located at the upper face of the foam body so as to be in contact with the length of pipe resting thereon.

In another such arrangement, the porous reinforcing sheet is spaced from the upper face so as to leave a thickness of foam material between the upper face of the foam body and a respective one of the first and second faces of the reinforcing sheet proximal thereto.

In an alternative arrangement, the reinforcing sheet is rigid.

In one such alternative arrangement, a lower one of the first and second faces of the reinforcing sheet is connected to the upper face of the foam body such that an opposite upper one of the first and second faces of the reinforcing sheet is disposed in contact with the length of pipe.

It is another aspect of the invention to provide device for supporting a length of pipe adapted to carry oil or gas in a subterranean environment, in combination with the length of pipe, the device comprising:

a continuous sheet of flexible reinforcing material having a plurality of openings formed through a thickness of the sheet from one face of the sheet to an opposite face thereof;

a body of synthetic polymeric foam material passing from said one face of the sheet of reinforcing material and through the openings defined therein to embed the sheet of reinforcing material in fixed location in the body of synthetic polymeric foam material;

the body of synthetic polymeric foam material being shaped to define a plurality of peripheral faces wherein:

- a first one of the peripheral faces is engaging the length of pipe disposed thereon;
- a second one of the peripheral faces opposite to the first peripheral face and spaced therefrom by a thickness of the synthetic polymeric foam material is arranged for contact with a ground surface; and
- at least one of the peripheral faces is planar;

said thickness of the body of synthetic polymeric foam material being adapted to support the length of pipe when carrying the oil or gas therein;

the sheet of reinforcing material being contained wholly within a periphery of the body of synthetic polymeric foam material;

the sheet of reinforcing material being embedded in planar orientation in the body of synthetic polymeric foam material;

the sheet of reinforcing material being disposed in contact only with synthetic polymeric foam material inside the periphery of the body of synthetic polymeric foam material;

the sheet of reinforcing material being located in the body of synthetic polymeric foam material with said opposite face of the sheet disposed at or adjacent said at least one planar peripheral face substantially parallel thereto to distribute across a width of the body of synthetic polymeric foam material a force applied in a transverse direction to said at least one planar peripheral face of said body.

In one arrangement, the foam material comprises polyurethane foam.

In one arrangement, the opposite face of the sheet of reinforcing material is located at the periphery of the body of synthetic polymeric foam material to define at least a portion of said at least one planar peripheral face of said body.

In one arrangement, the opposite face of the sheet of reinforcing material is recessed from said at least one planar peripheral face of the body of synthetic polymeric foam material so that a thickness of the synthetic polymeric foam material is disposed between said opposite face of the sheet of reinforcing material and said at least one peripheral face of the body of synthetic polymeric foam material.

In one arrangement, at least a portion of a peripheral edge of the sheet of reinforcing material is recessed from the periphery of the body of synthetic polymeric foam material so that a thickness of the synthetic polymeric foam material is disposed about said at least a portion of the peripheral edge of the sheet of reinforcing material.

In one arrangement, the sheet of reinforcing material comprises a material selected from the group consisting of plastic, rubber, and geotextile.

In one arrangement, there is provided another one of the sheet of reinforcing material defining a second sheet of reinforcing material embedded in the body of synthetic polymeric foam material at a spaced location from the sheet of reinforcing material disposed at or adjacent said at least one planar peripheral face.

In one arrangement, the pipe-engaging peripheral face includes a longitudinally extending depression receiving the length of pipe and spanning between opposite ends of the reinforced foam block.

It is yet another aspect of the invention to provide a device for supporting a length of pipe adapted to carry oil or gas in a subterranean environment, in combination with the length of pipe, the device comprising:

a continuous sheet of reinforcing material having a plurality of openings formed through a thickness of the sheet from one face of the sheet to an opposite face thereof;

the body of synthetic polymeric foam material being shaped to define a plurality of peripheral faces wherein:

- a first one of the peripheral faces is engaging the length of pipe disposed thereon;
- a second one of the peripheral faces opposite to the first peripheral face and spaced therefrom by a thickness of the synthetic polymeric foam material is arranged for contact with a ground surface; and
- at least one of the peripheral faces is planar;

said thickness of the body of synthetic polymeric foam material being adapted to support the length of pipe when carrying the oil or gas therein;

the sheet of reinforcing material being contained wholly within a periphery of the body of synthetic polymeric foam material;

the sheet of reinforcing material being located in the body of synthetic polymeric foam material with said opposite face of the sheet located at the periphery of the body of synthetic polymeric foam material to define at least a portion of said at least one planar peripheral face.

In one arrangement, the pipe-engaging peripheral face includes a longitudinally extending depression receiving the length of pipe and spanning between opposite ends of the reinforced foam block.

According to an aspect of the invention there is provided a reinforced foam block comprising:

a body of foam material forming a main body which has at least one peripheral face with a predetermined surface area;

at least one body of reinforcing material, which has greater tensile strength than the foam material, forming a sheet with a prescribed surface area and a peripheral edge delimiting the prescribed surface area, said at least one body of reinforcing material being embedded in the body of foam material so as to be carried by the body of foam material in prescribed position within the main body;

said at least one body of reinforcing material providing strength to said main body against force applied to the main body in a direction transversely with respect to the prescribed surface area of the respective body of reinforcing material.

The embodiment as described in more detail hereinafter increases performance of foam blocks over those which contain foam alone, free of any other materials incorporated therewith. This performance is related to capabilities of the block to withstand different types of forces exerted thereon.

In one arrangement, the foam material comprises polyurethane foam.

Preferably, said at least one body of reinforcing material is carried at or adjacent said at least one peripheral face.

In one instance, said at least one body of reinforcing material is located at said at least one peripheral face so as to define a surface of said at least one peripheral face.

In another instance, said at least one body of reinforcing material is recessed from said at least one peripheral face so that a thickness of the foam material is disposed over the prescribed surface area of said at least one body of reinforcing material.

In one arrangement, at least a portion of the peripheral edge of the respective body of reinforcing material is recessed from a peripheral edge of the main body so that a thickness of the foam material is disposed about said at least a portion of the peripheral edge of the respective body of reinforcing material.

In one arrangement, said at least one body of reinforcing material comprises a body of permeable material such that the foam material passes through a thickness of the body of permeable material so as to hold the body of permeable in the body of foam material.

The body of permeable material may be porous. That is, the body of permeable material may have a plurality of openings formed through a full thickness of the permeable material.

In one arrangement, said at least one body of reinforcing material comprises a material selected from the group consisting of plastic, rubber, and geotextile.

In one arrangement, said at least one body of reinforcing material comprises a plurality of bodies of reinforcing material which are arranged in the main body in spaced parallel fashion relative to one another. For example, a first one of the reinforcing material bodies is carried at or adjacent the respective one of the peripheral faces of the main body and a second one of the reinforcing material bodies is spaced therefrom so as to be more deeply situated in the main body but spaced from a diametrically opposite one of the peripheral faces. In a different example, each one of a pair of reinforcing material bodies is carried at or adjacent one of a diametrically opposite pair of peripheral faces.

In one arrangement, said at least one peripheral face comprises a plurality of peripheral faces of the main body, and said at least one body of reinforcing material comprises a plurality of bodies of reinforcing material respectively carried at or adjacent one of the plurality of peripheral faces.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred arrangements of the invention will now be described in conjunction with the accompanying drawings in which:

FIG. 1 is a top plan view of a first arrangement of device according to the present invention.

FIG. 2 is a cross-sectional view along line A-A in FIG. 1 showing the first arrangement thereof.

FIG. 3 is a cross-sectional view along line B-B in FIG. 1 showing the first arrangement thereof.

FIG. 4 is a cross-sectional view as if along line A-A but showing a second arrangement of device according to the present invention.

FIG. 5 is a cross-sectional view as if along line A-A but showing a third arrangement of device according to the present invention.

FIG. 6 is a cross-sectional view as if along line A-A but showing a fourth arrangement of device according to the present invention.

FIG. 7 is a cross-sectional view as if along line B-B but showing a fifth arrangement of device according to the present invention.

FIG. 8 is a cross-sectional view as if along line B-B but showing a sixth arrangement of device according to the present invention.

FIG. 9 is a cross-sectional view as if along line B-B but showing a seventh arrangement of device according to the present invention.

FIG. 10 is a cross-sectional view as if along line B-B but showing an eighth arrangement of device according to the present invention.

FIG. 11 is a perspective view of one arrangement of encapsulation kit.

FIG. 12 is a cross-sectional view along line C-C in FIG. 11.

FIG. 13 is a cross-sectional view of another arrangement of encapsulation kit as if the cross-section were taken along line C-C and omitting some features for clarity of illustration.

FIG. 14 is a cross-sectional view of yet another arrangement of encapsulation kit as if the cross-section were taken along line C-C and omitting some features for clarity of illustration.

FIG. 15 is a cross-sectional view of a further arrangement of encapsulation kit as if it were taken along line C-C and omitting some features for clarity of illustration.

FIG. 16 is a cross-sectional view of a yet further arrangement of encapsulation kit as if the cross-section were taken along line C-C and omitting some features for clarity of illustration.

FIG. 17 is a side elevational view of a further arrangement of the encapsulation kit of FIG. 1 showing how more than two foam sections may be arranged together.

FIG. 18 is a top plan view of the arrangement of FIG. 17.

FIG. 19 is a cross-sectional view of another arrangement of encapsulation kit as if it were taken along line C-C and omitting some features for clarity of illustration.

FIG. 20 is a cross-sectional view of yet another arrangement of encapsulation kit as if it were taken along line C-C and omitting some features for clarity of illustration.

FIG. 21 is an end view of another arrangement of device according to the present invention supporting a length of pipe thereon.

FIG. 22 is a side elevational view of the arrangement of FIG. 21.

In the drawings like characters of reference indicate corresponding parts in the different figures.

DETAILED DESCRIPTION

The accompanying figures show a device 1 which is usable alone or in combination with another like device to support a length of pipe 200 adapted to carry oil or gas in a subterranean environment, which in industry is often termed a pipeline.

As more clearly shown in FIGS. 21 and 22, the device 1 comprises a body of rigid synthetic polymeric foam material 2 which defines an upper face 3A of the foam body arranged for substantially receiving a weight force WG of the length of pipe 200 resting on the device. That is, the upper face 3A of the foam body first receives the weight of the length of pipe, weight being understood as a force which is a vector quantity having magnitude and direction, wherefrom the force due to the weight of the length of pipe is transmitted through a reminder of the foam body. The foam body additionally defines a lower face 3B arranged for resting on a ground surface G.

The foam body 2 also has a pair of opposite upstanding sides 4A, 4B interconnecting the upper and lower faces 3A, 3B. The sides 4A, 4B are spaced from one another in a width direction of the foam body such that a width of the foam body is measured therebetween. Additionally, the foam body extends longitudinally from a first end 4C to a second end 4D which are spaced from one another in a length direction of the foam body such that a length thereof is measured therebetween.

Between the upper and lower faces 3A, 3B of the foam body is defined a thickness of the foam body, which is arranged so as to be suited for carrying the weight of the length of pipe when carrying the oil or gas therein.

The rigid synthetic polymeric foam material is slightly compressible so as to provide a cushioning effect but not so much that the weight of the length of pipe acts to substantially reduce the thickness of the foam body from its original condition.

The device 1 further includes a planar sheet of reinforcing material 5 having a peripheral edge 6 delimiting a first face 7A of the sheet and an opposite second face 7B of the sheet. Typically the peripheral edge comprises peripheral side edges 6A, 6B which are spaced from one another in a width direction of the sheet and peripheral end edges 6C, 6D which are spaced from one another in a length direction of the sheet. As such, the peripheral side edges and the peripheral end edges collectively delimit the opposite first and second faces 7A, 7B.

A thickness of the reinforcing sheet is measured between the first and second faces 7A, 7B and is less than the thickness of the foam body 2. The reinforcing sheet 5 is substantially incompressible across its thickness such that its thickness is constant even when a substantial external force is applied in a direction parallel to the sheet's thickness. That is, a force of sufficient magnitude is more likely tear the sheet than to irreversibly compressively deform it.

The reinforcing sheet 5 is connected to the foam body 2 and located at or adjacent the upper face 3A thereof where the pipe's weight is initially received by the foam body before being further transmitted through the same, and furthermore the sheet 5 is connected in a manner so as to be oriented in a plane which is transverse to a thickness direction of the foam body, the thickness direction being parallel to the thickness of the foam body, so that the reinforcing sheet is oriented substantially perpendicularly to the weight force of the length of pipe 200 exerted on the foam body. Thus, the reinforcing sheet 5 acts to distribute the weight of the length of pipe, which is an external force acting on the foam body, across a width of the foam body as otherwise the weight force is substantially localized and is conducive to shearing the foam body along the thickness direction.

As shown for example in FIGS. 1-4, which will be described in more detail shortly, one arrangement of the device comprises a reinforcing sheet which is flexible and porous so as to define a plurality of openings formed through the thickness of the sheet, and the reinforcing sheet is embedded in the foam body such that the foam material passes into the openings of the reinforcing sheet for interconnecting to the foam body. The reinforcing sheet 5 is in contact only with the foam material within the periphery of the foam body. Thus it is the rigid foam material which carries the reinforcing sheet in a manner so as to maintain a substantially fixed planar shape of the sheet, which despite its flexibility in the absence of a substantially rigid carrier, can act as a weight distributor for the foam body.

In one such arrangement of device as described in the above paragraph, and as illustrated for example in FIGS. 1-3, the porous reinforcing sheet is located at the upper face 3A of the foam body so as to be in contact with the length of pipe resting thereon. In another such arrangement as shown for example in FIG. 4, the porous reinforcing sheet is spaced from the upper face so as to leave a thickness of foam material between the upper face of the foam body and a respective one of the first and second faces of the reinforcing sheet proximal thereto.

An alternative arrangement of the device like that shown in FIG. 21, the reinforcing sheet is not flexible and instead is rigid. For example, the rigid reinforcing sheet is one-quarter inch thick Polyboard, which is made from recycled plastics and is considered as a plastic variant of plywood.

In such an arrangement, a lower one of the reinforcing sheet faces at 7B is connected to the upper face of the foam body 2, for example by a suitable adhesive, such that an opposite upper one of the faces at 7A is disposed in contact with the length of pipe.

The reinforcing sheet 5 is sized in width so as to span substantially the width of the foam body.

The reinforcing sheet 5 is continuous across its width so that it transfers the weight of the pipe substantially uniformly across the foam material disposed thereunder between a lower one of the sheet faces 7B and the lower face 3B of the foam body, as the point of contact of the length of pipe is relatively narrow in width as compared to the width of the foam body.

Both the reinforcing sheet 5 and the foam body 2 are sized in respective widths larger than a diameter D of the length of pipe 200.

Hereinafter the device may be referred to as a reinforced foam block for convenient reference.

Referring to FIGS. 1 through 10, there are illustrated a number of preferred arrangements of reinforced foam block.

In the following description, features which are common to all of the illustrated preferred arrangements of reinforced foam block are described first. Then, description of features which are unique with respect to the respective preferred arrangement follow thereafter. It will be understood that features which are described particularly with respect to one of the preferred arrangements of reinforced foam block may be combined in an appropriate manner with features specifically described with another one of the preferred arrangements.

The reinforced foam block comprises a body of foam material 10. In one preferred example, the foam material comprises synthetic polymeric foam such as polyurethane foam. It may be preferred also that the foam material comprises a thermally insulating foam, of which polyurethane foam is an example as well.

The body of foam material forms a three-dimensional main body 12 which has a volume and at least one peripheral face 14 with a predetermined surface area. That is, reference to ‘block’ in this specification is intended to not be limiting of shape of the block and includes any 3D shape. For example, the block may be shaped, in three dimensions, as a sphere, cylinder (for example circular cylinder, rectangular cylinder, and triangular cylinder), pyramid, etc. Typically, the main body 12 has a plurality of peripheral faces 14 which may be exposed to an external environment of the foam block, and therefore subject to forces exerted in directions transversely to the surface area of the respective peripheral face 14, such as those schematically indicated by arrows indicated at F1, F2, and F3 in FIG. 3 (which are spaced from the foam block for clarity of illustration). Since the foam material is suited for providing a cushioning effect due to its material properties, such foam blocks are typically subjected to compressive forces.

The reinforced foam block includes at least one body of reinforcing material 16 embedded within the main body 12. The reinforcing material has greater tensile strength than the foam material 10 forming the main body. As such, the reinforcing material 16 may be considered to be ‘more resistant to pressure’ than the foam material 10 before incurring permanent shape change. That is, in comparison to the foam material, the reinforcing material is less likely to become at least one of broken; penetrated or pierced; or split, divided, or otherwise reduced to fragments as a result of pressure exerted on this material. Pressure can be regarded as force applied per unit area, such that pressure and force are related to one another. Examples of suitable reinforcing material 16 include plastic, rubber, and geotextile. Additionally, the reinforcing material may comprise a permeable material. For example, the permeable material may be porous so as to have a plurality of openings, each of which is formed through a full thickness of the body of reinforcing material. As such, either one of plastic, rubber, and geotextile materials in a suitable form may be considered to be permeable. The reinforcing material may also be flexible so as to be suited for a degree of deformation in shape within the main body in accordance with a general application in which the foam block is provided as a cushion.

In the illustrated arrangements, each body of reinforcing material 16 forms a sheet with a predetermined thickness and a prescribed surface area delimited by a peripheral edge 17. The sheet may be may be polygonal shaped with nonlinear sides such that in alternative arrangements the sheet is not necessarily rectangular in shape with straight linear sides.

Each body of reinforcing material 16 is embedded in the body of foam material 10 so as to be carried by the body of foam material in prescribed position within the main body 12. A respective orientation of the reinforcing material body may vary from one arrangement to another. For example, the reinforcing sheet 16 may be parallel to a proximal peripheral face 14A to which the sheet is located closest, or the reinforcing sheet may be inclined with respect to the closest peripheral face 14A.

The main body 12 benefits from the provision of each body of reinforcing material in that each reinforcing material body provides strength to the main body against force applied to the main body in a direction transversely with respect to the prescribed surface area of the respective body of reinforcing material, for example as forces F1 through F3 as expressly shown in FIG. 3.

This enhancement in strength of the main body 12, provided by the body of reinforcing material, may be realized in a number of different ways including in a manner such that the reinforcing material acts to hold the foam material together so as to resist splitting or breaking up into smaller fragments under transversely applied forces.

Additionally or alternatively, the strength enhancement of the main body may be realized in a manner such that the body of reinforcing material 16 disperses a transversely applied force which is exerted on the main body, and which may be transmitted through the foam material to the reinforcing material body, over the prescribed surface of the body of reinforcing material. For example, the characteristic described in this paragraph may be attributed, at least to some degree, to material hardness of the reinforcing material—that is, resistance of the material to permanent shape change.

Location of the body of reinforcing material 16 within the main body, in relation to the peripheral faces 14 and peripheral edges 20 of the main body, may vary from one arrangement to another as demonstrated in FIGS. 1 through 10.

In one arrangement, a respective body of reinforcing material 16 is carried at or adjacent the respective peripheral face 14A. Additionally or alternatively, a respective body of reinforcing material 14 is spaced further from the peripheral face 14A so as to be more deeply situated in the main body than at a location at or adjacent the peripheral face, for example at a location approximately midway between diametrically opposite pair of peripheral faces 14A, 14B.

FIGS. 1 through 3 more clearly show a first arrangement of the reinforced foam block. In this first arrangement, the body of foam material 10 comprises a rectangular cylinder or rectangular prism. Furthermore, the body of reinforcing material 16 forms a rectangular sheet with uniform thickness over its entire prescribed surface area. In this illustrated first arrangement, the body of reinforcing material comprises a PVC plastic mesh (as schematically indicated in FIG. 1) such that the material is porous and thus permeable.

In terms of structure, the body of reinforcing material 16 of the first arrangement is located at one of the peripheral faces 14A of the main body so as to define a surface of this particular peripheral face. Therefore, one face 18 of the body of the reinforcing material is wholly uncovered across the face's surface area by any foam material and is thus exposed to an external surrounding environment of the main body. However, the reinforcing material body's peripheral edge 17 is spaced from or recessed from a peripheral edge 20 of the respective peripheral face 14A of the main body at which the reinforcing material body is located so as to be entirely surrounded by a thickness of the foam material disposed about the peripheral edge 17 of the reinforcing material body.

FIG. 4 more clearly illustrates a second arrangement of the reinforced foam block, which includes a single body of reinforcing material 16A located adjacent one of the peripheral faces 14A of the main body 12 but recessed therefrom. Therefore, a thickness of the foam material is disposed over the prescribed surface area of one face 18A of the body of reinforcing material 16A which is oriented parallel to the proximal peripheral face 14A near which the reinforcing material body is disposed. In this illustrated second arrangement, the thickness of the foam material between the proximal peripheral face 14A of the main body and the closest face 18A of the reinforcing sheet body is uniform across the surface area thereof. Furthermore, at least a pair of diametrically opposite edges of the reinforcing body that form the peripheral edge 17 thereof are spaced from the peripheral edge 20 of the proximal peripheral face 14A. In contrast, the remaining pair of opposing edges may be aligned with respective edges of the proximal peripheral face so as to be exposed to the external environment and generally flush with opposing peripheral faces which adjoin the proximal peripheral face, as more clearly shown in FIG. 8, for example. Alternatively, the entire peripheral edge 17 of the reinforcing body may be spaced from the peripheral edge of the proximal peripheral face as more clearly demonstrated in FIG. 1, such that the entirety of the body of reinforcing material is encapsulated in the foam material. Moreover, for example, the body of reinforcing material 16A in this second arrangement may comprise a sheet of stranded rubber, such as that which comprises a plurality of individual rubber strands aggregated in the form of a mat or interwoven in the form of a mat.

In general, whether the body of reinforcing material is fully encapsulated by the body of foam material or whether any portion of the reinforcing material body is exposed so as to be uncovered by foam material, as seen more clearly in FIG. 4 the body of reinforcing material is oriented in the main body in a manner so as to match a contour of the proximal peripheral face 14A of the main body. However, in alternative embodiments, the body of reinforcing material may be misaligned from the contour of the proximal peripheral face.

Turning now to FIG. 5, this figure more clearly illustrates a third arrangement of reinforced foam block including a plurality of bodies of reinforcing material 16A, 16B, 16E disposed in a virtually stacked array within the main body 12. More specifically, the reinforcing material bodies 16A, 16B, and 16E are disposed in spaced parallel fashion relative to one another so as to be separated by a thickness of foam material 10 disposed between each pair of adjacent reinforcing material bodies. As such, two outermost ones of the reinforcing bodies 16A and 16B are carried adjacent diametrically opposite peripheral faces 14A and 14B but recessed therefrom, and a third intermediate one of the reinforcing bodies 16E is disposed approximately midway between these opposing peripheral faces. Such a layered arrangement as illustrated may provide redundancy and added strength for an inside center portion of the main body over an arrangement having bodies of reinforcing material carried only at or adjacent the peripheral faces of the main body. Furthermore, in this third arrangement, for example, the reinforcing material may comprise geotextile material.

In FIG. 6, a fourth arrangement of reinforced foam block is more clearly shown and includes a plurality of bodies of reinforcing material 16A through 16D, each of which is carried at or adjacent one of the plurality of peripheral faces 14A through 14D of the main body. In the illustrated fourth arrangement, each reinforcing body is parallel to its proximal peripheral face (as indicated by matching appended letters) and recessed therefrom. With such an arrangement, the main body 12 is reinforced with a body of reinforcing material carried at or adjacent each peripheral face. Furthermore, of the four reinforcing bodies in the illustrated fourth arrangement, each diametrically opposite pair thereof 16A, 16B and 16C, 16D is carried in the main body 12 in spaced parallel fashion relative to one another. Additionally, faces 18 of smaller-sized ones of the reinforcing material bodies 16C and 16D generally overlap the peripheral edges 17 of larger-sized ones of the reinforcing material bodies 16A and 16B, although an amount of foam material is disposed between the overlapped faces and peripheral edges.

FIG. 7 more clearly shows a fifth arrangement of reinforced foam block in which the sheet body of reinforcing material 16A is located at one peripheral face 14A of the main body so as to define the full surface thereof and thus span the full predetermined surface area of this peripheral face. Furthermore, the sheet body's peripheral edge 17 is entirely exposed about its full periphery. As such, only one face of the sheet body is wholly covered by the foam material. Also, in the illustrated fifth arrangement, the body of reinforcing material comprises the body of permeable material (as schematically indicated in FIG. 7), such as the PVC mesh plastic, such that the foam material passes through a thickness of the permeable material body so as to hold same in the body of foam material 10. The foam material may pass through a partial thickness or through a full thickness of the sheet body of permeable material.

FIG. 8 more clearly illustrates a sixth arrangement of reinforced foam block in which the body of reinforcing material 16A is recessed from the proximal peripheral face 14A but the peripheral edge 17 of the reinforcing body is exposed so as to uncovered by any foam material. In this illustrated sixth arrangement, the body of reinforcing material comprises permeable material, such as that which is porous, such that the foam material passes through a thickness of the body of permeable reinforcing material so as to hold the reinforcing body within the main body.

Turning now to FIG. 9, this figure more clearly shows a seventh arrangement of reinforced foam block in which a plurality of bodies of reinforcing material 16A through 16D are disposed. In this illustrated seventh arrangement, one diametrically opposite pair of the reinforcing bodies 16A, 16B are recessed from proximal peripheral faces 14A, 14B closest to which each one of this opposing pair is located, with their peripheral edges 17 exposed at peripheral faces 14C, 14D adjoining the respective proximal face 14A or 14B. Also, each one of a second diametrically opposite pair of the reinforcing material bodies 16C, 16D is located at the respective proximal peripheral face 14C or 14D so as to define its surface and thus have a wholly uncovered, exposed face 18 of the respective body of reinforcing material.

In FIG. 10, an eighth arrangement of reinforced foam block is shown, in which a plurality of bodies of reinforcing material 16A through 16D are provided and each of these is recessed from a proximal peripheral face 14A through 14D closest to the respective reinforcing body so as to be fully covered, on all faces and peripheral edges, by the foam material. In contrast to FIG. 6, faces 18 of larger-sized ones of the reinforcing material bodies 16A and 16B generally overlap the peripheral edges 17 of smaller-sized ones of the reinforcing material bodies 16C and 16D, though an amount of foam material is disposed between the overlapped faces and peripheral edges.

Note that in the illustrated arrangements, each body of reinforcing material is sized such that its prescribed surface area, which is formed by one face of the reinforcing material body that is generally parallel to and facing (from the inside of the main body) a proximal peripheral face of the main body, is on the order of the predetermined surface area of the proximal peripheral face.

In other embodiments, multiple bodies of reinforcing material may be carried at a common peripheral face such that their collective surface area is on the order of the surface area of the proximal peripheral face. These multiple bodies of reinforcing material may be arranged in butting engagement with one another, or alternatively the multiple bodies of reinforcing material are spaced apart from one another so as to be separated by an amount of foam material between an adjacent pair of the reinforcing bodies carried at the common peripheral face.

In order to manufacture the reinforced foam block, the respective body of reinforcing material is disposed in a prescribed position in a chamber with an open top and closed bottom and held in place by a securing arrangement therein. A covering closes the open top of the chamber, and collectively the chamber and covering form a mold providing the shape of the main body 12. The foam material 10 is injected in liquid form through one of the covering and a chamber wall. The foam material then expands in the closed chamber so as to fill a remaining space in the mold which is unoccupied by the respective body of reinforcing material placed therein. Depending on the type of material employed for the reinforcing body, the foam material may pass through a thickness of the reinforcing body as the foam material expands thereby infusing the reinforcing material with the foam material. In the manner described in this paragraph, the respective body of reinforcing material is embedded in the main body and carried in its prescribed position in the main body by the foam material.

Referring to FIGS. 11 through 20, there is illustrated a kit for encapsulating a length of pipe 200 that is generally indicated by reference numeral 100. The kit for encapsulating the length of pipe is referred to as a ‘pipe encapsulation kit’ hereinafter in the description for convenience. The reinforced foam block may be suited for use in this encapsulation kit, as will become apparent with further description of this particular example in more detail hereinafter.

The pipe encapsulation kit 100 is suited for protecting piping which is disposed underground so as to reside in a subterranean environment. The piping or pipe may extend along an underground grade, that is at an elevation below the ground surface, such that the length of pipe is oriented substantially horizontally in the ground. The pipe 1 may also be oriented uprightly in the ground at riser sections of the pipeline where the piping traverses several underground grades in order to arrive at or extend away from equipment located at or near the ground surface. Furthermore, the length of pipe may follow a straight line path, a curved path at a bend section of the pipeline, or a serpentine like path with several curves in the path of the piping.

Underground, a length of pipe which is exposed to its external subterranean surroundings may be subject to stress from abrasive debris and contents in the ground, such as rocks, which directly engage the pipe and generate pressure points on the pipe surface. With prolonged stress and pressure points, which are exacerbated by movement of the pipeline such as due to thermal expansion and contraction thereof, longevity of the pipe decreases and likelihood of the pipe rupturing increases. Pipe ruptures and consequent leakage of the fluids carried by the pipeline can be costly for the pipeline operator and for the environment.

In order to shield the piping from the abrasive contents in the ground, the pipe encapsulation kit 100 comprises first and second foam sections 102 and 104. Each of the first and second foam sections extend in a respective longitudinal axis along the length of pipe 200 in a manner so as to be suited for covering a longitudinal length of the pipe. The two foam sections are shaped to cooperatively form a longitudinally elongate cavity 106 in a working configuration of the foam sections as more clearly shown in FIG. 11. That is, each foam section is shaped in transverse cross-section across its width so that, when the foam sections are disposed in the working configuration, the foam sections cooperate to form the cavity for receiving the length of pipe therein so as to enclose the length of pipe around its full circumference thereby shielding the length of pipe 200 from the subterranean environment. The cavity 106 formed in the working configuration spans a full longitudinal length of the foam sections 102, 104 and has open ends so that the pipe is receivable in the cavity. Additionally, the cavity has a height dimension and a width dimension which are measured transversely to one another and to the longitudinal axis. The height and width of the cavity are sized at least equal to a pre-specified diameter of the pipe ‘D’ which is encapsulated. In FIG. 12, double-headed arrows indicated at ‘H’ and ‘W’ illustrate general directions in which the height and the width of the cavity are measured respectively.

In the illustrated arrangements of FIGS. 11 through 16, each foam section is generally L-shaped in transverse cross-section so as to have a long leg and a short leg. Thus, the L-shaped foam sections arranged in the working configuration form a cavity having a rectangular cross-section with the long legs of each of the foam sections disposed opposite one another and the short legs disposed opposite one another. Furthermore, the foam material which makes up these foam sections 102, 104 can be considered to be ‘high density foam’ as will become apparent shortly.

Generally speaking, in the working configuration, one of the foam sections (for example that indicated at 102) defines a bottom covering usable for positioning at the bottom of the pipe circumference and another one of the foam sections (for example that indicated at 104) defines a top covering usable for positioning at the top of the pipe circumference. ‘Bottom’ and lop′ typically refer to opposite locations with respect to the circumference of the pipe. Thus, when the length of pipe is generally horizontally oriented, the bottom covering is positioned beneath the length of pipe 200 and the top covering is positioned over the length of pipe. However, if the length of pipe is oriented uprightly, the bottom covering may not necessarily be lower than the top covering. Furthermore, each foam section may define one of the top covering and the bottom covering such that the top and bottom coverings are individual pieces, like the arrangements illustrated in FIGS. 11 through 20. For example, the L-shaped foam sections in the illustrated embodiment are disposed one on top of the other so that there is provided a first bottom foam section and a second top foam section. In other embodiments, a single foam section may define both the top and bottom coverings. For example, in an alternative embodiment, one of the foam sections may be generally C-shaped in cross-section and a second one of the foam sections may define an insert which is received between parallel branches of the C-shaped foam section so as to form the cavity in the working configuration.

Thus, the first and second foam sections 102 and 104 form an outer protective covering which shields the length of pipe from the external underground environment—in other words, the external subterranean environment.

A securing arrangement 108 is provided to hold the first and second foam sections 102, 104 together in the working configuration. In the illustrated arrangements of FIGS. 11 through 20, the securing arrangement 108 comprises a plurality of bands which ring around an outside of the foam sections about their transverse perimeter thereby snugly holding the foam sections together with one another in the working configuration.

Furthermore, in the illustrated arrangements of the encapsulation kit, an inner reinforcing membrane 110 is carried at or adjacent a respective inside face 112A of the bottom covering so as to be arranged to line a portion of the cavity 106. That is, the inner reinforcing membrane 110 lies along a boundary of the cavity. As such, the inner reinforcing membrane may be exposed to the cavity so as to directly engage a circumferential outer surface of the pipe 200, as more clearly shown in FIG. 12. Alternatively, the inner reinforcing membrane may be covered by a thickness of foam material over the inner reinforcing membrane's surface area so as to be spaced from the inside face 112A of the bottom covering but located closer to this inside face than to an opposite outside face 112B of the bottom covering. In either case, the inner reinforcing membrane comprises a body of material which has greater tensile strength than a material of the first and second foam sections so as to provide strength for the bottom covering. The inner reinforcing membrane 110 may dissipate at least a portion of the weight of the pipe and may act to hold the foam material of the bottom covering together without the foam material fragmenting under weight of the length of pipe 200.

At least one outer reinforcing membrane 114 may also be provided as more clearly shown in FIGS. 13 and 14. The outer reinforcing membrane 114 is carried at or adjacent a respective outside face 112B, 116B of at least one of the first and second foam sections, with the outside face being exposable to the subterranean environment. In the illustrated arrangements of the encapsulation kit, the outer reinforcing membranes 114 are located at or adjacent the outside face which is opposite to the inside face 112A, 116A of the respective foam section 102, 104. The outer reinforcing membrane may be located at the outside face so as to define its surface as for example shown in FIG. 13. Alternatively, the outer reinforcing membrane may be fully enveloped by foam material within a main body of the respective foam section as more clearly shown in FIG. 14. Similar to the inner reinforcing membranes, the outer reinforcing membranes provide strength for an outward facing shell of the foam sections. The outer reinforcing membrane comprises a body of material which has greater material hardness than the material of the foam sections. Therefore, the material of the outer reinforcing membrane may also be more resistant to pressure than the foam material of the foam sections. Thus, punctures through a full thickness of the foam sections due to sharp debris in the ground may be prevented. Furthermore, the outer reinforcing membranes may dissipate at least a portion of the weight of the subterranean environment exerting compressive forces on the foam sections, and may hold the foam material together under compressive forces of the subterranean environment on the foam sections in the working configuration.

Additionally, a volume of low density foam 118 is provided for filling any unoccupied space in the cavity 106 once the pipe 200 is received therein. The low density foam 118 is less dense than the material of the first and second foam sections 102, 104 so as to cushion the length of pipe 200 in a manner in which stress is reduced. That is, pressure from pressure points exerted directly on the outer foam section and transmitted therethrough may be dissipated by the low density foam. Therefore, as mentioned before, the material of the first and second foam sections may be considered to be high density relative to the low density foam 118. Furthermore, this lower density of the low density foam with respect to the foam sections allows a degree of movement of the length of pipe within the cavity while reducing stress on the pipe that is generated internally within the encapsulation kit by this movement.

Returning now to the components of the pipe encapsulation kit in more detail, and turning first to the foam sections, the foam sections 102 and 104 are made from an insulating material so as to provide thermal insulation for the piping. For example, the foam sections are made of polyurethane foam which has thermal insulating properties. The polyurethane foam is injected into molds thereby producing the appropriately shaped foam sections.

The first and second foam sections 102 and 104 have a predetermined thickness ‘T’ where thickness is measured transversely with respect to the longitudinal axis of the foam sections and thus generally radially with respect to a center of the cavity 106 as better shown in FIGS. 15 and 16. More particularly, it is the top covering and bottom coverings (irrespective of the specific configurations of foam sections) which have the predetermined thickness of foam material as measured between an outer face 112B or 116B of the respective covering and an opposite inside face thereof 112A or 116A that defines a wall of the cavity in the working configuration of the foam sections. This predetermined thickness T is on the order of the pre-specified diameter D of the pipe 200 which is to be encapsulated. For example, the predetermined thickness T may be equal to the pre-specified diameter D. As such, the predetermined thickness T may lie in a first prescribed range of 1 to 40 inches. The predetermined thickness T may alternatively lie in a second prescribed range of 1.5 to 38 inches and provide similar functionality to that of the first prescribed range. Moreover, the predetermined thickness T may alternatively lie in a third prescribed range of 2 to 36 inches and provide similar functionality to that of the first and second prescribed ranges. Values of the prescribed ranges for the predetermined thickness correspond to typical diameter values of the piping used in pipelines. As more clearly shown in FIG. 15, the foam sections may also have the pre-determined thickness T of foam material between each one of outside faces, which lie to one side of the walls of the cavity which define the width W thereof, and the respective one of these walls.

The foam sections 102, 104 are also sized in order to provide a sufficiently large cavity 106. Typically, the width W of the cavity is sized larger than the height H of the cavity as shown in the illustrated arrangements. That is, in the illustrated embodiment, the width W is taken between cavity walls formed by the short legs of the foam sections and the height H is taken between cavity walls formed by the long legs of the foam sections. Thus, the width W of the cavity is sized on the order of at least twice the pre-specified diameter D of the length of the pipe. For example, the width W is equal to twice the pre-specified diameter D. Thus, sufficient room may be provided in the cavity 106 for the low density foam 118 to reside therein such that the length of the pipe is adequately cushioned. The height H of the cavity is sized on the order of the pre-specified diameter D of the pipe, such as slightly larger than the pre-specified diameter D, so that the length of pipe 200 is provided with some room to shift or expand in its size across the height dimension H of the cavity.

Turning now to the inner reinforcing membrane 110, the inner reinforcing membrane of the illustrated arrangements more clearly shown in FIG. 12 which is exposed to the cavity 106 comprises a body of antifriction material so that friction between the inner reinforcing membrane and the length of pipe 200 is reduced, such as the friction generated by movement of the pipe along or across the inner reinforcing membrane. This reduction in friction is intended to reduce pressure and stress on the length of pipe. For example, the antifriction material comprises a sheet of ethafoam forming a mat on the inside face of the bottom covering. In another example, PVC plastic, such as rock shield which forms a mesh sheet, may be suited for use as the antifriction inner reinforcing membrane. In a further example, a body of rubber material, such as stranded rubber, forming a mat on the inside face of the bottom covering comprises the antifriction inner reinforcing membrane.

In the illustrated arrangements as more clearly shown in FIGS. 12 through 16, the inner reinforcing membrane 110 spans the full length and the full width of the cavity 106 so as to be rectangular in shape. Furthermore, the inner reinforcing membrane is centrally located with respect to the full width of the first bottom foam section 102 where the membrane is carried. The inner reinforcing membrane may be embedded in the foam section so as to be enveloped by the foam material of the foam section or infused therewith. Alternatively, the inner reinforcing membrane may be attached to the foam material of the respective foam section by an adhesive, for example a suitable glue. In the instance that the inner reinforcing membrane is located at the inside face of the bottom covering so as to define the surface thereof, the inner reinforcing membrane may be considered to be a sacrificial layer or membrane which directly engages the outer surface of the pipe.

Turning now to the outer reinforcing membrane 114, the outer reinforcing membrane may be embedded in the foam section so as to be enveloped by the foam material of the foam section or infused therewith. Alternatively, the outer reinforcing membrane may be attached to the foam material by a suitable adhesive. Furthermore, the outer reinforcing membranes may be placed at a plurality of the outside (outward facing) faces of the foam sections which are exposable to the external subterranean environment, as more clearly shown in FIG. 14.

Now turning to the low density foam 118, the low density foam resides in all of the unoccupied space in the cavity which is between the cavity walls and the pipe. In the illustrated embodiment, the low density foam 118 primarily resides to either side of the length of the pipe. As such, the low density foam snugly sandwiches the length of pipe 200 within the cavity 106 between the foam sections, with the provision of movement as discussed hereinbefore. Preferably, as shown more clearly in FIG. 12, the pipe is positioned within the cavity so as to be spaced from opposing sides of the cavity defining the width W thereof such that the volume of the low density foam is disposed across the full height H of the cavity on either side of the length of the pipe 200 so that a thickness of low density is provided around a full circumference of the pipe with the exception of where the pipe engages the inner reinforcing membrane 110. In this manner, side-to-side movement of the pipe within the cavity 106 may be sufficiently cushioned. The low density foam may comprise a material such as spray foam or a combination of spray foam and ethafoam. Furthermore, the low density foam may be sprayed so as to fill the cavity.

According to the above description, the foam sections 102, 104 and reinforcing membranes 110, 114 and low density foam 118 collectively form a cocoon-like structure which envelops and encapsulates the length of pipe so as to preserve same. In other words, the aforementioned components form a shielding enclosure in the working configuration for the length of pipe 200. The pipe encapsulation kit 100 is suited for preventing pressure on the length of pipe, providing thermal insulation, cushioning expansion of the pipe, and thereby increasing longevity of the length of pipe and reducing possibility of failure thereof and blowouts.

A length value of the pipe that may be protected by the shielding enclosure comprising a pair of the foam sections depends on the individual lengths of the foam sections. Typically, both the first bottom and second top foam sections are identical in construction so as to have a common overall dimensions.

Depending on the application, different arrangements of the shielding enclosure may be employed. In one arrangement, a plurality of shielding enclosures can be installed at spaced intervals along the length of the pipeline so as to protect separate length portions of the pipe. For example, each of these shielding enclosures comprises the pair of foam sections aligned with one another along their lengths. In another arrangement, like that shown in FIGS. 17 and 18, a continuous uninterrupted length of pipe may be protected by arranging more than two foam sections end-to-end. In this particular arrangement for protecting the continuous uninterrupted length of the pipe, the first bottom foam sections (only one is shown in FIGS. 17 and 18) are disposed end-to-end to a common bottom side of the pipe and the second top foam sections are disposed to a common top side of the pipe in a similar manner as the bottom foam sections. Each pair of one first foam section and second foam section, which are opposite one another and collectively circumferentially enveloping a length portion of the pipe, are held together by the securing arrangement 108 such as the bands discussed hereinbefore. The first and second foam sections are offset from one another in a lengthwise direction along the longitudinal axis so as to present a portion of an inside face thereof 112A, 116A respectively for overlapping by another one of the opposite one of the first and second foam sections, so a majority of the respective foam sections are secured or banded to two of the oppositely designated foam section. Further to this, respective junction ends of each pair of adjacent first foam sections and each pair of adjacent second foam sections are filled with the low density foam 118 to afford shifting of one of said at least two foam sections relative to the other.

FIG. 19 shows another arrangement of encapsulation kit according to the present invention in which each one of the foam sections 102, 104 is generally U-shaped so as to have two, transversely opposite short legs which are connected by a base spanning perpendicularly therebetween. Also, a volume of low density foam in the form of a pair of pads 118′ is disposed to either side of the length of pipe 200 in the cavity 106 such that a majority but not all of the cavity is occupied by the low density foam. Each pad 118′ covers an inside face of the respective short leg of the U-shaped foam section and a portion of the inside face 116A of the base. The respective pad 118′ is attached to at least one of the short leg and the base of the U-shaped foam section such as by a suitable adhesive. Furthermore, each pad 118′ is sized, for example by having a thickness, such that the unoccupied space as measured in a direction along the width W of the cavity is sized on the order of the diameter D of the length of pipe 200.

FIG. 20 shows yet another arrangement of encapsulation kit in which each of the foam sections 102, 104 includes a groove or depression 121, 122 in the inside face 112A, 116A of the respective foam section. The depression spans the full length of the respective foam sections and locates the length of pipe 200 in the cavity 106. Thus, the depression may be suited for reducing rolling movement during installation of the length of pipe across the respective inside face of the foam section that defines the bottom covering. As such, the cavity as measured between opposing depressions 121, 122 which are positioned diametrically opposite one another in the working configuration of the foam sections is sized on the order of the diameter D of the length of pipe 200, while the cavity between remaining portions of the inside faces 112A and 116A that are outside of the groove 121, 122 in the cavity provide a height which is less than the diameter D of the length of pipe. Also, in the illustrated arrangement each depression is formed by a series of planar surfaces, each contiguous with the next. Each depression 121, 122 comprises transversely opposite side portions 121A₁/122A₁and 121A₂/122A₂, which are inclined so as that the depression tapers inwardly from its outermost sides, and a flat main portion 121B/122B which spans between the side portions. Additionally, the low density foam pads 118′ are disposed to either side of the length of pipe 200 and span a full height of the cavity between the remaining portions of the inside faces 112A and 116A alongside the depressions 121 and 122.

It is therefore appreciated that the reinforced foam blocks are suited for use in the encapsulation kit 100 for one or both of the foam sections. The reinforced foam blocks provide their respective bodies of reinforcing material 16 at strategic locations within the body of foam material 10 for strengthening the main body 12 of the foam block, thus providing a cushion which may be able to withstand significant compressive forces such as due to resting pipes down upon these blocks. The bodies of reinforcing material are also materially harder than the foam material, thereby being better suited for resisting punctures than the foam material.

FIGS. 21 and 22 show the device 1 alone supporting a length of pipe 200 (schematically shown). In this illustrated arrangement, the length of pipe is generally laterally centrally located on the device 1, or reinforced foam block, relative to the width direction of the foam body 2. The weight force of the pipe W_Pis shown as acting downwardly at a theoretical centre of gravity CG_Pof the length of pipe. Of course, the point of contact of the length of pipe 200 whereat the weight W_Pis transmitted to the device 1 is a bottom 203 thereof. From this contact point at 203, the reinforcing sheet 5 which is located either at or adjacent the contact point (for example, where the reinforcing sheet is encapsulated by the foam body as shown for example in FIG. 4) in a transverse orientation to the weight force transfers the weight W_Pacross its full width due to its lateral rigidity, whether due to rigidity of the reinforcing material or the rigid shape provided by the support of the foam body (as in the case of an embedded reinforcing sheet), and this distributed force is then transmitted to the foam body between the lower face 7B of the reinforcing sheet and the lower face 3B of the foam body 2. The arrangement as shown in FIGS. 21 and 22 shows the upper and lower faces 3A, 3B of the foam body as planar and parallel

As shown in FIGS. 21 and 22, the lower face 3B of the foam body may be covered by a sheet of woven fibrous material 210 which provides cathodic protection to the length of pipe 200 by placement on the device 1 at a location where the device can contact the surrounding environment.

The present invention as described herein relates generally to a device for supporting a length of pipe which is adapted to carry oil or gas in a subterranean environment. The device comprises a body of rigid synthetic polymeric foam material defining an upper face of the foam body arranged to substantially receive a weight of the length of pipe and a lower face arranged for contacting a ground surface. A planar sheet of reinforcing material which is substantially incompressible in a thickness direction thereof is connected to the foam body at or adjacent the upper face thereof in transverse orientation relative to a thickness direction of the foam body between the upper and lower faces thereof so that the reinforcing sheet is oriented substantially perpendicularly to the weight of the length of pipe exerted on the foam body.

Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.

	Number	Date	Country
Parent	14928175	Oct 2015	US
Child	16288208		US

REINFORCED FOAM BLOCK FOR SUPPORTING A PIPELINE

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