Patent Grant
11454067
The present application is generally directed to drilling rigs. Particularly, the present disclosure relates to drilling rigs having cantilevered drill floors. More particularly, the present disclosure relates to support structures for cantilevered drill floors.
The background description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this background section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.
Rigs drilling in the high Arctic may include sealed units to retain heat during drilling operations and rig moves. These rigs may move as a convoy of trailers towed by trucks and self-propelled units as they move between drilling pads in the high Arctic. The typical rig move between pads may be several hundred yards or several miles. The complete rig may also move from well to well on the pad during drilling operations. During rig moves, the loads may be maintained below the tire capacity, bridge capacity, ice road capacity, or other limiting factors. Arctic wells may be drilled to depths of up to or exceeding 35,000 feet in some cases.
Drilling to great depths may require relatively large drilling rigs and relatively heavy equipment. For example, a relatively large wellhead Christmas tree and blowout preventer may be needed. These devices can add hundreds of thousands of pounds to the drill rig, and their height may require a relatively tall drill floor to allow for clearance of the Christmas tree and blowout preventer.
One style of rig for Arctic drilling is a cantilevered style. In a cantilevered style rig, the drill floor, mast, and well center may be cantilevered out over the well and wellhead to provide suitable vertical clearance for drilling operations. The cantilevered nature of the rig may enable the rig to traverse along a row of wells, completing each well as it moves parallel to the row of wells. However, as the drilling hookload on these cantilevered rigs increases during drilling operations, the drill floor may deflect downward as a result of the cantilevered design.
Additionally, there may be limited space surrounding a well, thus restricting the ability to place a support structure beneath a cantilevered drill floor. For example, production piping may extend from the well and run vertically and/or horizontally in varying configurations surrounding the well. Production piping may additionally be asymmetrical at a well, and/or piping for multiple wells on a multi-well drilling pad may differ among wells. Other structures or substructures may additionally or alternatively limit space beneath a drill floor. Additionally, spacing between adjacent wells or adjacent rows of wells on a pad drilling site may be relatively limited. There may also be ground pressure limitations or requirements surrounding wells. For example, spacing constraints may limit the size of a drill pad, and/or may limit the ability to prepare the ground to, or above, a particular ground pressure.
The following presents a simplified summary of one or more embodiments of the present disclosure in order to provide a basic understanding of such embodiments. This summary is not an extensive overview of all contemplated embodiments, and is intended to neither identify key or critical elements of all embodiments, nor delineate the scope of any or all embodiments.
The present disclosure, in one or more embodiments, relates to a modular drilling cellar configured to be arranged beneath a drill floor of a drilling rig. The cellar may include a housing for storing well head equipment and a drill floor support structure having a pair of support legs. Each support legs may have an extension portion coupled to the cellar and configured to be arranged in an operating position and a roading position. Each leg may additionally have a column portion coupled to the extension portion and configured to be arranged in an operating position and a roading position. Each leg may have a bearing foot coupled to the column portion. In some embodiments, each extension portion may include an extension member extendable from an outer sheath. Additionally or alternatively, the extension portion may include a pivoting frame. Additionally or alternatively, the extension portion may include a retractable frame. Each column portion may include two members coupled together at a hinged connection. Additionally or alternatively, each column portion may include a column member configured to scope through a collar coupled to the extension portion. Each bearing foot may be configurable and may have at least one removable section. In other embodiments, each bearing foot may have at least one hinged section. Each bearing foot may be coupled to the column portion via a load cell pin. Further, in some embodiments, each leg may be independently actuable. The modular drilling cellar may have a second pair of legs in some embodiments.
The present disclosure, in one or more embodiments, additionally relates to a drill floor support structure having a pair of legs, each leg configured to be arranged in a roading position and an operating position. Each leg may have an extension portion and a column portion, each of which is configured to be arranged in an operating position and a roading position. Moreover, each leg may have a bearing foot coupled to the column portion. In some embodiments, each extension portion may have: an extension member extendable from an outer sheath, a pivoting frame, and/or a retractable frame. In some embodiments, the column portion may include two members coupled together at a hinged connection. The column portion may include a column member configured to scope through a collar coupled to the extension portion. In some embodiments, each bearing foot may be configurable and may have at least one removable section. In other embodiments, each bearing foot may have at least one hinged section. Moreover, each leg of the drill floor support structure may be independently actuable in some embodiments.
The present disclosure, in one or more embodiments, additionally relates to a drilling rig having a drill floor and a drill floor support structure configured to transfer loading on the drill floor to a ground or pad surface. The drill floor support structure may have a pair of legs each configured to be arranged in a roading position and an operating position. Each leg may have an extension portion and a column portion, each of which may be configured to be arranged in an operating position and a roading position. Moreover, each leg may have a bearing foot coupled to the column portion. In some embodiments, each extension portion may have an extension member extendable from an outer sheath. Additionally or alternatively, each extension portion may have a pivoting frame and/or a retractable frame.
While multiple embodiments are disclosed, still other embodiments of the present disclosure will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of the invention. As will be realized, the various embodiments of the present disclosure are capable of modifications in various obvious aspects, all without departing from the spirit and scope of the present disclosure. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter that is regarded as forming the various embodiments of the present disclosure, it is believed that the invention will be better understood from the following description taken in conjunction with the accompanying Figures, in which:
The present disclosure, in one or more embodiments, relates to a drill floor support structure configured to be arranged beneath a drill floor, such as a cantilevered drill floor, for supporting the drill floor during drilling operations. In particular, the drill floor support structure may have columns, legs, or outriggers configured to extend between the drill floor and a ground or pad surface to provide stiffening support to the drill floor. The drill floor support structure may be configured to transfer loading, including a dead load, hook load, wind load, and/or other loading, from the drilling floor to a ground surface or pad surface. In this way, the drill floor support structure may help reduce deflection of the drill floor caused by weight of equipment, operational loading, and/or other loading.
In some embodiments, a drill floor support structure of the present disclosure may couple to, or extend from, a drill floor, such as a lower surface or an edge of a drill floor. However, in other embodiments, a drill floor support structure may couple to, or extend from, a cellar module arranged generally beneath a drill floor. In other embodiments, a drill floor support structure may couple to, or extend from, another structure or substructure of a drilling rig or surrounding a well head. In still other embodiments, a drill floor support structure of the present disclosure may be a free-standing or independent structure arranged beneath a drill floor. In such embodiments, the drill floor support structure may be configured to couple to and/or abut an underside of the drill floor, for example.
Drill floor support structures of the present disclosure may generally be configured to accommodate limited spacing and reduced clearances around or above a well head. For example, a drill floor support structure of the present disclosure may be configured with a mechanism, or combination of mechanisms, to allow columns, legs, or outriggers to deploy without interfering with production piping or other structures, or to otherwise deploy within space constraints beneath a drill floor. In some embodiments, columns, legs, or outriggers of a drill floor support structure may be configured to transition between a roading position and one or more operating positions. In a roading position, the columns, legs, or outriggers may be generally retracted, withdrawn, or pivoted off of a ground or pad surface to clear cellar well houses as the drilling structure is removed from, or arranged in, the well area. In an operating position, the columns, legs, or outriggers may be extended laterally outward so as to extend generally between the drill floor and a ground or pad surface to provide stiffening support to the drill floor. Columns, legs, or outriggers may have more than one operating position, such that they may be arranged in different configurations as needed to accommodate differing geometries or spacing constraints. Moreover, columns, legs, or outriggers of the present disclosure may be configured to be independently actuable or drivable so as to accommodate asymmetrical geometries or spacing constraints around a well head.
In some embodiments, a drill floor support structure of the present disclosure may have columns, legs, or outriggers with one or more pivoting or rotating mechanisms. For example, columns, legs, or outriggers may be configured to pivot between one or more operating positions and a roading position. The columns, legs, or outriggers may additionally or alternatively be configured to pivot or rotate to other positions and/or to any suitable degree of rotation. In some embodiments, columns, legs, or outriggers may be configured to pivot or rotate about more than one axis and/or at more than one location. As another example, columns, legs, or outriggers may have one a plurality of members and hinges forming a retractable or collapsible frame. Pivoting, or rotating mechanisms may help to keep columns, legs, or outriggers clear of production piping and/or other structures while the drill floor support structure is moved into position over or around a well head. Additionally, swinging, pivoting, or rotating mechanisms may increase versatility of a drill floor support structure by allowing columns, legs, or outriggers, or portions thereof, to be pivoted, rotated, or swung to any suitable position or angle as needed to accommodate differing geometries and/or spacing constraints around different well heads.
Additionally or alternatively, a drill floor support structure of the present disclosure may have columns, legs, or outriggers with one or more foldable or jointed members. For example, columns, legs, or outriggers may have one or more joints or may otherwise be configured to separate into two or more foldable sections. Such folding members may allow the drill floor support structure, or portions thereof, to be retracted or pulled clear of production piping and/or other structures while the drill floor support structure is moved into position over or around a well head.
Additionally or alternatively, a drill floor support structure of the present disclosure may have one or more telescoping or scoping mechanisms. For example, columns, legs, or outriggers, or portions thereof, may be configured to retract into or pass through an outer sheath or collar. In some embodiments, columns, legs, or outriggers, or portions thereof, may have two or more telescoping sections configured to nestably engage one another. Such telescoping or scoping mechanisms may help to keep columns, legs, or outriggers clear of production piping and/or other structures while the drill floor support structure is moved into position over or around a well head. Additionally, telescoping or scoping mechanisms may increase versatility of a drill floor support structure. For example, in some embodiments, columns, legs, or outriggers, or portions thereof, may be extended or telescoped to a desired length up to the full extendable length of the component. In this way, columns, legs, or outriggers, or portions thereof, may be extended or telescoped to different lengths to accommodate differing geometries and/or spacing constraints around different well heads.
In general, drill floor support structures of the present disclosure may have bearing feet configured to transfer loading from the drill floor to a ground or pad surface generally beneath the drill floor. Bearing feet may be sized and shaped with different footprints to provide particular ground pressures and/or to accommodating spacing constraints or production piping geometries around well heads. In some embodiments, bearing feet may be configured with a rectangular, square, round, or cross or x-shaped footprint. In other embodiments, bearing feet may be configured with any other suitably shaped footprint. In some embodiments, bearing feet of the present disclosure may be configurable or reconfigurable. For example, a bearing foot may have one or more removable portions that may be detached and/or moved to modify the shape of the foot. In some embodiments, the foot may be configured such that the detachable portion(s) may be coupled to the foot at different locations. For example, a portion of a bearing foot may be operably attachable along a first side and along a second side of a bearing foot, depending on the needs of a particular well head and drill floor setup. Such configurable bearing feet may be modified as needed depending on differing geometries and/or spacing constraints around different well heads. In some embodiments, bearing feet may additionally or alternatively have pivotable or otherwise movable portions. The movable portions may allow the bearing feet to be maneuvered into or through relatively tight spaces. Additionally, in some embodiments, the movable portions may be used to modify the footprint of the bearing foot for operation.
Hydraulic cylinders, electric motors, and/or other driving or actuating mechanisms may be used to drive the various mechanisms described herein for deploying a drill floor support structure to an operating position or for retracting a drill floor support structure to a roading position. In some embodiments, columns, legs, or outriggers of the present disclosure may be independently drivable or actuable. In this way, columns, legs, or outriggers of a drill floor support structure may be deployed asymmetrically to accommodate asymmetrical geometries or spacing constraints around different well heads, for example. For example, a first leg of a drill floor support structure may be telescoped to a first length while a second leg of the support structure may be telescoped to a second length, which may be shorter or longer than the first length. In some embodiments, bearing feet of a drill floor support structure may be configured differently, using detachable or pivotable portions for example, to accommodate asymmetrical geometries or spacing constraints.
It is to be appreciated that a drill floor support structure of the present disclosure may incorporate any one of, any combination of, or all of, the above-described mechanisms. Some particular embodiments are described below with reference to
Turning now to
Each extension member 104 may be configured to operably extend or telescope from, and retract into, a corresponding outer sleeve 106. As shown in
Each extension member 104 may be or include a hollow or solid member constructed of steel or another suitable metal or combination of metals. In some embodiments, the extension members 104 may each have a square or rectangular cross sectional shape. In other embodiments, the extension members 104 may each have a round or other suitable shape. Each extension member 104 may have any suitable length. In general, the extension members 104 may each have a length configured to extend laterally beyond production piping or other structures surrounding a well head such that the bearing feet may be placed to avoid such structures. In some embodiments, the extension members 104 may have a length of between approximately 5 feet and approximately 30 feet, or between approximately 10 feet and approximately 20 feet. In other embodiments, the extension members 104 may have any other suitable length.
Each outer sleeve 106 may be or include a hollow member sized and shaped to receive the extension members 104, such that the extension members may nestably engage the outer sleeve. In this way, each outer sleeve 106 may have a cross sectional shape and size configured to receive its corresponding extension member 104. Moreover, each outer sleeve 106 may have a length configured to accommodate the length of a corresponding extension member 104, or at least a majority thereof. Where a single outer sleeve 106 receives both extension members 104, as shown for example in
For each leg 102, the column portion may extend between the extension portion and the bearing foot 110 and may be configured to transfer loading to the bearing foot. Each column portion may be or include a hollow or solid column member 108 constructed of steel or another suitable metal or combination of metals. Each column member 108 may have any suitable cross sectional shape and size. In some embodiments, the column members 108 may have a square, rectangular, round, or other suitable cross sectional shape. Each column member 108 may have a length configured to extend between the extension portion and the bearing foot 110 so as to position the bearing foot on a ground or pad surface generally beneath the drill floor during operation.
In some embodiments, for each leg 102, the column portion may be pivotably or rotatably coupled to the extension portion. For example, the column member 108 may be configured to pivot about an axis aligned with a central, longitudinal axis of the extension member 104.
In some embodiments, each column member 108 may have one or more joints 112 configured to divide the member into two pivotably connected sections 114. For example, a joint 112 may be located at a mid-point or approximate mid-point to divide the column member 108 into two sections 114 of approximately the same length. In other embodiments, the joint 112 may be located at a different point along the length of the column member 108. The column members 108 may have more than one joint 112 in some embodiments. Each joint 112 may be a pinned connection. For example, a first pin at each joint may be arranged through aligned lugs or ears of the two column sections 114, such that the second column section may pivot about the pinned connection, as shown in
With continued reference to
In some embodiments, the bearing feet 110 may have one or more pivotable or removable sections 116. As shown for example in
Additionally or alternatively, in some embodiments, bearing feet 110 of the present disclosure may be configurable. For example, one or more sections 116 of a bearing foot 110 may be configured to be removed and repositioned at a different location of the bearing foot. Bearing foot sections 116 may be unpinned and repined (or otherwise decoupled and coupled) to different locations on the bearing foot 110 configured to receive the sections. This may allow bearing feet 110 to be configured with different footprints, depending on the geometry and space constrains around a particular well head.
It is to be appreciated that an operating position of the legs 102, including an operating position of the extension portion and an operating position of the column portion, may depend on the particular geometry or spacing constrains around a particular well head. For example, in some embodiments, the legs 102 may be placed in an operating position with the extension members 104 extended to their full length from the outer sleeve(s) 106. However, in other embodiments, the legs 102 may be placed in an operating position with the extension members 104 only partially extended, or not extended, from the outer sleeve(s) 106. Additionally, in some embodiments and as generally described above, legs 102 of the support structure may be independently drivable or independently actuable. For example, one extension member 104 may be fully extended from the sleeve 106, while the extension member of a second leg 102 may be only partially extended while the legs are in an operating position. In this way, the legs 102 and/or bearing feet 110 may be configured as needed to accommodate asymmetrical geometries or space constraints around a particular well head.
As shown in
The modular cellar 150 may generally include a housing with a lower cellar area 152, a mezzanine 154, and one or more subassemblies 156 arranged around the mezzanine. The housing may be configured to house one or more blowout preventers, such as a main blowout preventer and/or other drilling equipment. The housing may be configured to provide an enclosed or partially enclosed environment around the well head to contain gasses. The housing may additionally be configured to provide one or more enclosed work environments for workers, thus providing protection from the environment. In some embodiments, the housing or a portion thereof may be climate controlled. For example, with respect to Arctic drilling operations, the housing or a portion thereof may be heated.
The lower cellar area 152 may be configured to provide a housing for a well head. In some embodiments, the lower cellar area 152 may additionally store equipment, such as a diverter blowout preventer and/or other drilling equipment. In some embodiments, the lower cellar area 152 may have hoisting and/or handling equipment for moving the diverter, blowout preventer, and/or other equipment. The lower cellar area 152 may generally be formed by sidewalls configured to extend around a well head. In some embodiments, the sidewalls may be retractable and/or readily removable so as to allow the cellar 150 to be moved over or across equipment and/or well heads.
The mezzanine 154 may be an enclosure generally arranged over the lower cellar area 152 and configured to house equipment, such as but not limited to, a main blowout preventer. The mezzanine 154 may generally have a ceiling portion 162, four wall portions, and a floor portion (not shown) defining the enclosure. Each of the floor and ceiling 162 portions may have an opening 158 configured to accommodate a well pipe. The mezzanine 154 may have a height configured to accommodate a main blowout preventer and/or other drilling equipment. Additionally, however, the mezzanine 154 may have a height configured to be arranged beneath a drill floor.
The subassemblies 156 may be enclosures arranged around the mezzanine 154, such as along one or more walls of the mezzanine. The subassembly enclosures 156 may provide additional work areas and/or equipment storage space beyond the mezzanine 154. Each subassembly enclosure 156 may be divided into multiple rooms or work or storage areas. In some embodiments, the subassembly enclosures 156 may be arranged in a stacked configuration to provide multiple levels of work or storage space. For example, a lower level subassembly 156 and an upper level subassembly may be arranged on each of a driller side and an off-driller side of the mezzanine 154. In some embodiments, the various enclosures 156 may have different sizes. It may be appreciated that in other embodiments, subassembly enclosures 156 may be arranged differently with respect to one another and/or with respect to the mezzanine 154.
In some embodiments, the housing may have one or more openings 160 configured to accommodate one or more crane rails for moving equipment into and out of the housing. For example, as shown in
In some embodiments, the cellar 150 may be configured to abut and/or couple to a drill floor of a drilling rig. That is, the ceiling portion 162 of the mezzanine 154, for example, may be configured to abut an underside of the drill floor when the cellar 150 is arranged beneath the drill floor. In this way, the ceiling portion 162, or another component arranged thereon, may have a relatively flattened surface configured to receive and/or abut the drill floor. Additionally, the cellar 150 may be configured to couple to the drill floor via one or more hydraulic pins and/or other suitable coupling mechanisms. In some embodiments, the ceiling portion 162 of the mezzanine 154 may operate as a drip pan when beneath the drill floor.
In some embodiments, the cellar 150 may have one or more inner bearing feet 164 in addition to bearing feet 110 arranged on the drill floor support structure 100. As shown in
In some embodiments, the cellar 150 may similar to those described in, or may include components or elements described in, U.S. Non-Provisional application Ser. No. 15/451,968, entitled Multi-Well BOP Cellar Trailer and filed Mar. 7, 2017, the content of which is hereby incorporated by reference herein in its entirety.
Turning now to
The extension portions may be similar to those discussed above with respect to
For each leg 202, the column portion may extend between the extension portion and the bearing foot 210 and may be configured to transfer loading to the bearing foot. Each column portion may be or include a hollow or solid column member 208 constructed of steel or another suitable metal or combination of metals. Each column member 208 may have any suitable cross sectional shape and size. In some embodiments, the column members 208 may have a square, rectangular, round, or other suitable cross sectional shape. Each column member 208 may have a length configured to extend between the extension portion and the bearing foot 210 so as to position the bearing foot on a ground or pad surface generally beneath the drill floor during operation.
In some embodiments, each column member 208 may be configured to scope through a collar 218 so as to extend or retract the column member. That is, the collar 218 may be a hollow bracket or sheath with open ends that may be sized and shaped to receive and slidingly engage the column member 208. For example, and as shown in
In some embodiments, for each leg 202, the collar 218 may be pivotably or rotatably coupled to the extension portion. For example, the collar 218 may be configured to pivot about an axis aligned with a central, longitudinal axis of the extension member 204. As the collar 218 pivots about its connection with the extension member 204, the column member 208 may additionally be pivoted about the same axis.
With continued reference to
Turning now to
For each leg 302, the support frame 320 may be configured to provide a point from which the pivoting frame 322 may pivot laterally. The support frame 320 may include one or a plurality of members. In some embodiments, as shown in
The pivoting frame 322 of each leg 302 may couple to the support frame 320 via one or more hinged connections and may be configured to pivot the leg about a generally vertical axis. The pivoting frame 322 may have one or more, and in some embodiments two, members pivotably coupled to the support frame. A first member 324 of the pivoting frame 322 may extend laterally outward, and generally horizontally, from its hinged connection at the support frame 320 toward the column member 308. A second member 326 of the pivoting frame 322 may be an angled member and may extend laterally and at an angle, such as an angle of approximately 45 degrees, from its pivoted connection at the support frame 320 toward the column member 308. In this way, the first 324 and second 326 members of the pivoting frame 322 may form a triangular frame structure between the support frame 320 and the column member 308. Hinged connections between the two members 324, 326 and the support frame 320 may be aligned such that the first and second members may pivot about a same axis, which may be a generally vertical axis. In other embodiments, the pivoting frame 322 may have other members arranged in any other suitable configuration. One or more members of the pivoting frame 322 may couple to the collar 318 for the column portion. For example, both the first 324 and second 326 members may couple to the collar 318. In other embodiments, one or more members of the pivoting frame 322 may couple directly to the column member 308.
The pivoting frame 322 may generally be configured to pivot in an arc about a generally vertical axis to arrange the legs 302 in a variety of operating positions. In an operating position, each leg 302 may be extended laterally toward a driller or an off-driller side of the cellar 350, as shown for example in
For each leg 302, the column portion may extend between the pivoting frame 322 and the bearing foot 310 and may be configured to transfer loading to the bearing foot. Each column portion may be or include a hollow or solid column member 308 constructed of steel or another suitable metal or combination of metals. Each column member 308 may have any suitable cross sectional shape and size. In some embodiments, the column members 308 may have a square, rectangular, round, or other suitable cross sectional shape. Each column member 308 may have a length configured to extend between the extension portion and the bearing foot 310 so as to position the bearing foot on a ground or pad surface generally beneath the drill floor.
In some embodiments, each column member 308 may be configured to scope through a collar 318 so as to extend or retract the column member. That is, the collar 318 may be a hollow bracket or sheath with open ends that may be sized and shaped to receive and slidingly engage the column member 308. The collars 318 and scoping mechanisms may be similar to those described above with respect to
In some embodiments, the legs 302 may additionally be configured to scope or telescope generally horizontally or laterally toward a driller and off-driller side of the drill floor or drilling rig. For example, in some embodiments, the support frame 320 and/or pivoting frame 322 may have one or more scoping or telescoping mechanisms. In other embodiments, a generally horizontal telescoping mechanism may couple to an end of the pivoting frame 322, for example.
With continued reference to
Turning now to
For each leg 402, the support frame 420 may be configured to provide a point from which the retractable frame 428 may pivotably retract and extend the column portion. The support frame 420 may include one or a plurality of members. In some embodiments, as shown in
For each leg 402, the retractable frame 428 may be configured to operatively retract and expand between one or more operating positions and a roading position, and generally to any suitable position therebetween. In some embodiments, the retractable frame 428 may include one or a plurality of members 430, 432 arranged between the support frame 420 and the column portion. One or more members 430, 432 of the retractable frame 428 may be pivotably coupled at a first end to the support frame 420 and may be pivotably coupled at a second end to the column portion, such as to the collar 418. At each pivoted connection, the member 430, 432 may be configured to pivot about a generally horizontal axis. In some embodiments, the retractable frame 428 may include a hydraulic cylinder 434 pivotably coupled to each of the support frame 420 and the column portion. At each pivotable connection, the hydraulic cylinder 434 may additionally be configured to rotate about a generally horizontal axis. The hydraulic cylinder 434 may be configured to operatively retract and extend the retractable frame 428. For example, as shown in
For each leg 402, the column portion may extend between the retractable frame 428 and the bearing foot 410 and may be configured to transfer loading to the bearing foot. Each column portion may be or include a hollow or solid column member 408 constructed of steel or another suitable metal or combination of metals. Each column member 408 may have any suitable cross sectional shape and size. In some embodiments, the column members 408 may have a square, rectangular, round, or other suitable cross sectional shape. Each column member 408 may have a length configured to extend between the extension portion and the bearing foot 410 so as to position the bearing foot on a ground or pad surface generally beneath the drill floor during operation.
In some embodiments, each column member 408 may be configured to scope through a collar 418 so as to extend or retract the column members. That is, the collar 418 may be a hollow bracket or sheath with open ends that may be sized and shaped to receive and slidingly engage the column member 408. The collars 418 and scoping mechanisms may be similar to those described above with respect to
With continued reference to
In some embodiments, the drill floor support structure 400 may include a second pair of legs 436. The second pair of legs 436 may generally employ any, or any combination of, the mechanisms described above. For example, the second pair of legs 436 may be configured to pivot, hinge, fold, retract, extend, telescope, and/or scope. In some embodiments, the second pair of legs 436 may be separately coupled to the cellar 450, drill floor, or to another substructure or surface. As shown in
For each leg 436, the pivoting frame 438 may be similar to those discussed above with respect to
For each leg 436, the column portion may extend between the pivotable frame 438 and the bearing foot 444 and may be configured to transfer loading to the bearing foot. In some embodiments, the column portion may be similar to those discussed above. For example, the column portion may include a hollow or solid column member 442 configured to scope through a collar 440 so as to extend or retract the column portion.
With continued reference to
In some embodiments, the bearing feet 444 of the second pair of legs 436 may generally be smaller than and configured for a smaller bearing pressure than the first pair of legs 402. However, in other embodiments, the second pair of legs 436 may be similarly sized and configured as the first pair of legs 402. Moreover, in other embodiments, a drill floor structure of the present disclosure may additionally have a third or fourth pair of legs, or any suitable number of legs, each of which may employ any, or any combination of, the above-described mechanisms.
Turning now to
The extension member 504 and outer sleeve 506 may be similar to some of those discussed above, such as with respect to
The column portions of the legs may be similar to some of those discussed above. For example, each column portion may extend between the corresponding extension portion and bearing foot 510 and may be configured to transfer loading to the bearing foot. Each column member 508 may be configured to scope through a collar 518 so as to extend or retract the column member. The column members 508 and collars 518 may be similar to those discussed above. Additionally, as described above with respect to
The bearing feet 510 may be similar to some of those discussed above. In some embodiments, each bearing foot 510 may couple to a column member 508 with a load cell pin or other load monitoring device so as to monitor loading on the bearing foot. Each bearing foot 510 may have any suitable shape.
Turning now to
The extension portions may be similar to some of those described above with respect to other embodiments. For example, the support frames 620 may each include one or a plurality of members and may be configured to provide a point from which a pivoting frame 622 may pivot laterally. Each support frame 620 may be configured to be pinned, bolted, or otherwise coupled to a wall of a subassembly of the cellar 650, to a wall of the mezzanine, an existing drilling structure, or to any other suitable surface or location. The pivoting frame 622 of each leg 602 may couple to the support frame 620 via one or more hinged connections and may be configured to pivot the leg about a generally vertical axis. The pivoting frame 622 may have one or more, and in some embodiments two, members pivotably coupled to the support frame 620, as described above with respect to
Additionally, the column portions may be similar to some of those described above. For example, each column portion may extend between the corresponding extension portion and bearing foot 610 and may be configured to transfer loading to the bearing foot. Each column member 608 may be configured to scope through a collar 618 so as to extend or retract the column member. The column members 608 and collars 618 may be similar to those discussed above.
Each bearing foot 610 may be pivotably coupled to its corresponding column portion. The bearing foot 610 may be coupled to an end of the column member 608, opposing an end where the column member couples to the extension portion. In some embodiments, each bearing foot 610 may couple to a column member 608 with a load cell pin or other load monitoring device so as to monitor loading on the bearing foot. Each bearing foot 610 may have any suitable shape. Additionally, in some embodiments, each bearing foot 610 may have one or more removable or pivotable portions 616. For example, in at least one embodiment, each bearing foot 610 may have a square-shaped central portion 611 and four removable or pivotable portions 616, with one removable or pivotable portion arranged on each side of the square-shaped central portion. The removable or extendable portion 616 may be used to alter the footprint of the bearing feet 610 as needed or desired to accommodate different spacing constraints or geometries around well heads. As shown in
Turning now to
As used herein, the terms “substantially” or “generally” refer to the complete or nearly complete extent or degree of an action, characteristic, property, state, structure, item, or result. For example, an object that is “substantially” or “generally” enclosed would mean that the object is either completely enclosed or nearly completely enclosed. The exact allowable degree of deviation from absolute completeness may in some cases depend on the specific context. However, generally speaking, the nearness of completion will be so as to have generally the same overall result as if absolute and total completion were obtained. The use of “substantially” or “generally” is equally applicable when used in a negative connotation to refer to the complete or near complete lack of an action, characteristic, property, state, structure, item, or result. For example, an element, combination, embodiment, or composition that is “substantially free of” or “generally free of” an element may still actually contain such element as long as there is generally no significant effect thereof.
Additionally, as used herein, the phrase “at least one of [X] and [Y],” where X and Y are different components that may be included in an embodiment of the present disclosure, means that the embodiment could include component X without component Y, the embodiment could include component Y without component X, or the embodiment could include both components X and Y. Similarly, when used with respect to three or more components, such as “at least one of [X], [Y], and [Z],” the phrase means that the embodiment could include any one of the three or more components, any combination or sub-combination of any of the components, or all of the components.
In the foregoing description various embodiments of the present disclosure have been presented for the purpose of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The various embodiments were chosen and described to provide the best illustration of the principals of the disclosure and their practical application, and to enable one of ordinary skill in the art to utilize the various embodiments with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the present disclosure as determined by the appended claims when interpreted in accordance with the breadth they are fairly, legally, and equitably entitled.
This application is a U.S. National Stage Filing under 35 U.S.C. 371 from International Application No. PCT/CA2019/000114, filed Aug. 6, 2019, which claims priority to U.S. Provisional Application No. 62/715,054, entitled Drill Floor Support Structures, and filed Aug. 6, 2018, the content of each by which are hereby incorporated by reference herein in their entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CA2019/000114 | 8/6/2019 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2020/028969 | 2/13/2020 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 295172 | Hill | Mar 1884 | A |
| 1557070 | Logue | Oct 1925 | A |
| 2420803 | Tobin | May 1947 | A |
| 2657017 | Curtis | Oct 1953 | A |
| 2663375 | Caldwell | Dec 1953 | A |
| 2781108 | Selberg et al. | Feb 1957 | A |
| 3063509 | Guier | Nov 1962 | A |
| 3099323 | Kelley | Jul 1963 | A |
| 3156328 | Bender | Nov 1964 | A |
| 3228151 | Woolslayer et al. | Jan 1966 | A |
| 3271915 | Woolslayer et al. | Sep 1966 | A |
| 3327997 | Howard | Jun 1967 | A |
| 3333377 | Woolslayer et al. | Aug 1967 | A |
| 3421596 | Christensen | Jan 1969 | A |
| 3477235 | Branham et al. | Nov 1969 | A |
| 3483933 | Dyer et al. | Dec 1969 | A |
| 3502166 | Christenson et al. | Mar 1970 | A |
| 3774780 | Buffington | Nov 1973 | A |
| 3807109 | Jenkins et al. | Apr 1974 | A |
| 3828513 | Vanderklaauw | Aug 1974 | A |
| 3911980 | Mccoll | Oct 1975 | A |
| 3922825 | Eddy et al. | Dec 1975 | A |
| 3942593 | Reeve, Jr. et al. | Mar 1976 | A |
| 3949818 | Russell | Apr 1976 | A |
| 3977542 | Stolzer | Aug 1976 | A |
| 4068487 | Pease et al. | Jan 1978 | A |
| 4081932 | Armstrong | Apr 1978 | A |
| 4128229 | Elliston | Dec 1978 | A |
| 4135340 | Cox et al. | Jan 1979 | A |
| 4269395 | Newman et al. | May 1981 | A |
| 4290495 | Elliston | Sep 1981 | A |
| 4324077 | Woolslayer | Apr 1982 | A |
| 4336840 | Bailey | Jun 1982 | A |
| 4366650 | Patterson | Jan 1983 | A |
| 4375241 | Gallon | Mar 1983 | A |
| 4375892 | Jenkins et al. | Mar 1983 | A |
| 4387814 | Beduhn et al. | Jun 1983 | A |
| 4421447 | Gudgel et al. | Dec 1983 | A |
| 4587778 | Woolslayer et al. | May 1986 | A |
| 4823870 | Sorokan | Apr 1989 | A |
| 4831795 | Sorokan | May 1989 | A |
| 4837992 | Hashimoto | Jun 1989 | A |
| 4885893 | Wasterval, Jr. et al. | Dec 1989 | A |
| 5216867 | Wasterval, Jr. et al. | Jun 1993 | A |
| 5407302 | Springett et al. | Apr 1995 | A |
| 5492436 | Suksumake | Feb 1996 | A |
| 5954453 | Thomas | Sep 1999 | A |
| 5997217 | Verret | Dec 1999 | A |
| 6045297 | Voorhees et al. | Apr 2000 | A |
| 6054829 | Young et al. | Apr 2000 | A |
| 6141870 | Mcdermott et al. | Nov 2000 | A |
| 6148940 | Hokanson et al. | Nov 2000 | A |
| 6171027 | Blankestijin | Jan 2001 | B1 |
| 6234527 | Poulin et al. | May 2001 | B1 |
| 6286615 | Bitelli | Sep 2001 | B1 |
| 6412576 | Meiners | Jul 2002 | B1 |
| 6474926 | Weiss | Nov 2002 | B2 |
| 6634436 | Desai | Oct 2003 | B1 |
| 6729804 | Roodenburg et al. | May 2004 | B1 |
| 6994171 | Orr et al. | Feb 2006 | B2 |
| 6997647 | Bennett, Jr. et al. | Feb 2006 | B2 |
| 7182163 | Gipson | Feb 2007 | B1 |
| 7308953 | Barnes | Dec 2007 | B2 |
| 7360589 | Moncus et al. | Apr 2008 | B2 |
| 7410326 | Morrison et al. | Aug 2008 | B2 |
| 7584809 | Flud | Sep 2009 | B1 |
| 7624831 | Orr et al. | Dec 2009 | B2 |
| 7765749 | Palidis | Aug 2010 | B2 |
| 7931076 | Ditta et al. | Apr 2011 | B2 |
| 7950478 | Terry | May 2011 | B2 |
| 8047303 | Donnally et al. | Nov 2011 | B2 |
| 8287212 | Roper | Oct 2012 | B2 |
| 8468753 | Donnally et al. | Jun 2013 | B2 |
| 8516751 | Konduc et al. | Aug 2013 | B2 |
| 8549815 | Donnally et al. | Oct 2013 | B2 |
| 8555564 | Wasterval | Oct 2013 | B2 |
| 8556003 | Souchek | Oct 2013 | B2 |
| 8875911 | Donnally et al. | Nov 2014 | B2 |
| 9091125 | Konduc et al. | Jul 2015 | B2 |
| 9091126 | Thiessen et al. | Jul 2015 | B2 |
| 9109399 | Murr et al. | Aug 2015 | B2 |
| 9212778 | Winter | Dec 2015 | B2 |
| 9463833 | Smith et al. | Oct 2016 | B2 |
| 9488014 | Sparkman | Nov 2016 | B2 |
| 9797196 | Taggart et al. | Oct 2017 | B2 |
| RE46723 | Smith et al. | Feb 2018 | E |
| 9926719 | Reddy et al. | Mar 2018 | B2 |
| 10293854 | Nguyen et al. | May 2019 | B2 |
| 10471986 | Nguyen et al. | Nov 2019 | B2 |
| 10822924 | Konduc et al. | Nov 2020 | B2 |
| 11021186 | Nguyen et al. | Jun 2021 | B2 |
| 20020185319 | Smith | Dec 2002 | A1 |
| 20030102166 | Jortveit | Jun 2003 | A1 |
| 20030147726 | Tolmon et al. | Aug 2003 | A1 |
| 20030172599 | Frink | Sep 2003 | A1 |
| 20040151549 | Roodenburg et al. | Aug 2004 | A1 |
| 20040211572 | Orr et al. | Oct 2004 | A1 |
| 20040211598 | Palidis | Oct 2004 | A1 |
| 20040240973 | Andrews et al. | Dec 2004 | A1 |
| 20060180564 | Keppel | Aug 2006 | A1 |
| 20070272762 | Click et al. | Nov 2007 | A1 |
| 20080257607 | Winter | Oct 2008 | A1 |
| 20090000218 | Lee et al. | Jan 2009 | A1 |
| 20090188677 | Ditta et al. | Jul 2009 | A1 |
| 20090283324 | Konduc | Nov 2009 | A1 |
| 20090321135 | Vora et al. | Dec 2009 | A1 |
| 20100150660 | Nadarajah et al. | Jun 2010 | A1 |
| 20100260555 | Foo et al. | Oct 2010 | A1 |
| 20100303586 | Hankins et al. | Dec 2010 | A1 |
| 20110072737 | Wasterval | Mar 2011 | A1 |
| 20110079568 | Mau et al. | Apr 2011 | A1 |
| 20110114386 | Souchek | May 2011 | A1 |
| 20110280104 | Mcclung, III | Nov 2011 | A1 |
| 20120047820 | Donnally et al. | Mar 2012 | A1 |
| 20120138327 | Sorokan et al. | Jun 2012 | A1 |
| 20120201632 | Yater et al. | Aug 2012 | A1 |
| 20120304553 | Konduc et al. | Dec 2012 | A1 |
| 20130168516 | Winter | Jul 2013 | A1 |
| 20130180186 | Konduc et al. | Jul 2013 | A1 |
| 20130269268 | Thiessen | Oct 2013 | A1 |
| 20130305632 | Rivera, Sr. et al. | Nov 2013 | A1 |
| 20130340572 | Flusche | Dec 2013 | A1 |
| 20130340998 | Flusche | Dec 2013 | A1 |
| 20130341036 | Flusche | Dec 2013 | A1 |
| 20140041855 | Rodgers | Feb 2014 | A1 |
| 20140090333 | Vogt | Apr 2014 | A1 |
| 20140158342 | Smith | Jun 2014 | A1 |
| 20140259985 | Petrello et al. | Sep 2014 | A1 |
| 20140262518 | Reddy et al. | Sep 2014 | A1 |
| 20140262519 | Petrello et al. | Sep 2014 | A1 |
| 20140262520 | Petrello et al. | Sep 2014 | A1 |
| 20140263685 | Yustus et al. | Sep 2014 | A1 |
| 20140270974 | Seng et al. | Sep 2014 | A1 |
| 20140270975 | Seng et al. | Sep 2014 | A1 |
| 20140331570 | Fullerton et al. | Nov 2014 | A1 |
| 20150014952 | Morikawa | Jan 2015 | A1 |
| 20150090450 | Thiessen | Apr 2015 | A1 |
| 20150122558 | Van Raden | May 2015 | A1 |
| 20150152690 | Sorokan et al. | Jun 2015 | A1 |
| 20150184466 | Rivera, Sr. et al. | Jul 2015 | A1 |
| 20150218891 | Padira et al. | Aug 2015 | A1 |
| 20150300038 | Thiessen | Oct 2015 | A1 |
| 20160052441 | Korach | Feb 2016 | A1 |
| 20160090788 | Niemczyk | Mar 2016 | A1 |
| 20160369523 | Konduc et al. | Dec 2016 | A1 |
| 20170081924 | Smith | Mar 2017 | A1 |
| 20170241126 | Konduc et al. | Aug 2017 | A1 |
| 20170254181 | Konduc et al. | Sep 2017 | A1 |
| 20180093705 | Nguyen et al. | Apr 2018 | A1 |
| 20180093706 | Nguyen et al. | Apr 2018 | A1 |
| 20190233006 | Nguyen et al. | Aug 2019 | A1 |
| 20210025263 | Konduc et al. | Jan 2021 | A1 |
| 20210062595 | Rochon et al. | Mar 2021 | A1 |
| 20220065048 | Reddy | Mar 2022 | A1 |
| Number | Date | Country |
|---|---|---|
| 3016910 | Sep 2017 | CA |
| 101476312 | Jul 2009 | CN |
| 102536267 | Jul 2012 | CN |
| 81516 | Mar 2009 | RU |
| 96904 | Aug 2010 | RU |
| 137053 | Jan 2014 | RU |
| 1461858 | Feb 1989 | SU |
| 1686052 | Oct 1991 | SU |
| 1770509 | Oct 1992 | SU |
| WO-2004094762 | Nov 2004 | WO |
| WO-2008114064 | Sep 2008 | WO |
| WO-2009002189 | Dec 2008 | WO |
| WO-2010132174 | Nov 2010 | WO |
| WO-2017155950 | Sep 2017 | WO |
| WO-2018064746 | Apr 2018 | WO |
| WO-2020028969 | Feb 2020 | WO |
| Entry |
|---|
| “Ackerman steering geometry”, Wikipedia, [Online] Retrieved from the Internet : <https://en.wikipedia.org/wiki/Ackermann_steering_geometry>, (Accessed Jan. 11, 2017), 3 pgs. |
| “U.S. Appl. No. 15/285,946, Non Final Office Action dated Dec. 11, 2018”, 8 pgs. |
| “U.S. Appl. No. 15/285,946, Notice of Allowance dated Jul. 9, 2019”, 5 pgs. |
| “U.S. Appl. No. 15/285,946, Response filed Sep. 5, 2018 to Restriction Requirement dated Jul. 5, 2018”, 6 pgs. |
| “U.S. Appl. No. 15/285,946, Response filed Mar. 11, 2019 to Non-Final Office Action dated Dec. 11, 2018”, 8 pgs. |
| “U.S. Appl. No. 15/285,946, Restriction Requirement dated Jul. 5, 2018”, 6 pgs. |
| “U.S. Appl. No. 15/349,661, Notice of Allowance dated Jan. 3, 2019”, 8 pgs. |
| “U.S. Appl. No. 15/349,661, Response filed Oct. 26, 2018 to Restriction Requirement dated Aug. 28, 2018”, 6 pgs. |
| “U.S. Appl. No. 15/349,661, Restriction Requirement dated Aug. 28, 2018”, 5 pgs. |
| “U.S. Appl. No. 15/451,968, Non Final Office Action dated Sep. 10, 2018”, 8 pgs. |
| “U.S. Appl. No. 15/451,968, Notice of Allowance dated Aug. 11, 2020”, 7 pgs. |
| “U.S. Appl. No. 15/451,968, Preliminary Amendment filed Sep. 5, 2018”, 5 pgs. |
| “U.S. Appl. No. 15/451,968, Response filed May 6, 2020 to Restriction Requirement dated Mar. 6, 2020”, 5 pgs. |
| “U.S. Appl. No. 15/451,968, Response filed Nov. 18, 2019 to Restriction Requirement dated Sep. 18, 2019”, 6 pgs. |
| “U.S. Appl. No. 15/451,968, Response filed Dec. 10, 2018 to Non Final Office Action dated Sep. 10, 2018”, 10 pgs. |
| “U.S. Appl. No. 15/451,968, Response filed Jun. 5, 2019 to Restriction Requirement dated Apr. 5, 2019”, 7 pgs. |
| “U.S. Appl. No. 15/451,968, Restriction Requirement dated Mar. 6, 2020”, 6 pgs. |
| “U.S. Appl. No. 15/451,968, Restriction Requirement dated Apr. 5, 2019”, 6 pgs. |
| “U.S. Appl. No. 15/451,968, Restriction Requirement dated Sep. 18, 2019”, 6 pgs. |
| “U.S. Appl. No. 15/451,968, Supplemental Notice of Allowability dated Sep. 30, 2020”, 4 pgs. |
| “U.S. Appl. No. 16/382,961, Final Office Action dated Nov. 12, 20”, 8 pgs. |
| “U.S. Appl. No. 16/382,961, Non Final Office Action dated May 14, 2020”, 7 pgs. |
| “U.S. Appl. No. 16/382,961, Notice of Allowance dated Jan. 28, 2021”, 5 pgs. |
| “U.S. Appl. No. 16/382,961, Response filed Jan. 13, 2021 to Final Office Action dated Nov. 12, 2020”, 6 pgs. |
| “U.S. Appl. No. 16/382,961, Response filed Aug. 10, 2020 to Non Final Office Action dated May 14, 2020”, 7 pgs. |
| “Axles & Suspension Wheeled Moving System”, Columbia Industries, [Online] Retrieved from the Internet : <http://www.joomag.com/magazine/columbiaindustries/0320299001391629028>, (Accessed Jan. 11, 2017), 4 pgs. |
| “Axles and Suspension”, Columbia Industries, [Online] Retrieved from the Internet : <http://www.columbiacorp.com/axlesandsuspension.php>, (Mar. 17, 2016), 2 pgs. |
| “Blue Calypso, LLC v. Groupon, Inc.”, CAFC, (Mar. 1, 2016), 46 pgs. |
| “Canadian Application Serial No. 3,016,910, Voluntary Amendment filed Jul. 8, 2019”, 13 pgs. |
| “Entro Heavy Haul”, Entro Industries, [Online] Retrieved from the Internet : <https://entro-eng.com/products/heavy-haul/heavy-haul-overview/>, (Accessed Jan. 11, 2017), 2 pgs. |
| “Entro Industries Homepage”, [Online] Retrieved from the Internet : <https://entroeng.com/>, (Accessed Jan. 18, 2017), 2 pgs. |
| “European Application Serial No. 12791970.2, Extended European Search Report dated Sep. 2, 2015”, 8 pgs. |
| “European Application Serial No. 12791970.2, Response filed Mar. 9, 2016 to Extended European Search Report dated Sep. 2, 2015”, 32 pgs. |
| “In re Wolfensperger”, 302 F.2d 950 (CCPA 1962), (May 18, 1962), 8 pgs. |
| “International Application Serial No. PCT/CA2012/000510, Response filed Mar. 14, 2013 to Written Opinion dated Aug. 24, 2012”, 4 pgs. |
| “International Application Serial No. PCT/CA2012/000510, Written Opinion dated Aug. 24, 2012”, 3 pgs. |
| “International Application Serial No. PCT/CA2015/000432, International Search Report dated Sep. 24, 2015”, 3 pgs. |
| “International Application Serial No. PCT/CA2015/000432, Written Opinion dated Sep. 24, 2015”, 5 pgs. |
| “International Application Serial No. PCT/CA2016/000229, International Search Report dated Oct. 26, 2016”, 3 pgs. |
| “International Application Serial No. PCT/CA2016/000229, Written Opinion dated Oct. 26, 2016”, 5 pgs. |
| “International Application Serial No. PCT/CA2017/000215, International Preliminary Report on Patentability dated Jan. 21, 2019”, 5 pgs. |
| “International Application Serial No. PCT/CA2017/000215, International Search Report dated Jan. 9, 2018”, 4 pgs. |
| “International Application Serial No. PCT/CA2017/000215, Written Opinion dated Jan. 9, 2018”, 6 pgs. |
| “International Application Serial No. PCT/CA2019/000114, Article 3 4 Amendments filed Jun. 1, 2020”, 8 pgs. |
| “International Application Serial No. PCT/CA2019/000114, International Search Report dated Nov. 20, 2019”, 3 pgs. |
| “International Application Serial No. PCT/CA2019/000114, Written Opinion dated Nov. 20, 2019”, 5 pgs. |
| “International Application Serial No. PCT/US2014/037431, International Search Report dated Oct. 7, 2014”, 2 pgs. |
| “International Application Serial No. PCT/US2014/037431, Written Opinion dated Oct. 7, 2014”, 6 pgs. |
| “International Application Serial No. PCT/US2016/019507, International Search Report dated Dec. 21, 2016”, 6 pgs. |
| “International Application Serial No. PCT/US2016/019507, Written Opinion dated Dec. 21, 2016”, 9 pgs. |
| “International Application Serial No. PCT/US2017/021095, International Preliminary Report on Patentability dated Sep. 20, 2018”, 11 pgs. |
| “International Application Serial No. PCT/US2017/021095, International Search Report dated Jun. 12, 2017”, 5 pgs. |
| “International Application Serial No. PCT/US2017/021095, Written Opinion dated Jun. 12, 2017”, 9 pgs. |
| “Nabors Oil Rig Move”, YouTube, [Online] Retrieved from the Internet : <https://www.youtube.com/watch?v=T4ELOeh6R6M>, (Oct. 22, 2008), 2 pgs. |
| “National Oilwell Varco Elevator/Substructure/Setback Cross-Section drawing”, (Jul. 24, 1979), 1 pg. |
| “National Oilweil Varco Mast & Substructure Erection Sequence drawing”, (Sep. 15, 1979), 1 pg. |
| “Photograph of Uralmesh rig”, (Jul. 2014), 1 pg. |
| “Photographs of typical Uralmesh train rig”, (Sep. 2012), 2 pgs. |
| “Pin-on Walkers for Ideal® Rigs”, Entro Industries, [Online] Retrieved from the Internet : <https://entro-eng.com/products/walking-systems/ideal-pin-on-walkers/>, (Accessed Jan. 11, 2017), 2 pgs. |
| “Steering”, Wikipedia, [Online] Retrieved from the Internet : <https://en.wikipedia.org/wiki/Steering>, (Accessed Jan. 11, 2017), 12 pgs. |
| “U.S. Appl. No. 16/948,994, Restriction Requirement dated Dec. 24, 2021”, 6 pgs. |
| “U.S. Appl. No. 16/948,994, Response filed Feb. 24, 2022 to Restriction Requirement dated Dec. 24, 2021”, 6 pgs. |
| “U.S. Appl. No. 16/557,644, Restriction Requirement dated Mar. 1, 2022”, 5 pgs. |
| “U.S. Appl. No. 16/948,994, Non Final Office Action dated Mar. 24, 2022”, 10 pgs. |
| “U.S. Appl. No. 16/557,644, Response filed May 2, 2022 to Restriction Requirement dated Mar. 1, 2022”, 7 pgs. |
| Number | Date | Country | |
|---|---|---|---|
| 20210172260 A1 | Jun 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| 62715054 | Aug 2018 | US |
