Not applicable.
Not applicable.
The disclosure relates generally to pipeline formed by reinforcing a metallic or nonmetallic pipe with martinsitic strip steel helically wound thereabout. More particularly, the disclosure relates a modular system and associated method for fabricating reinforced pipeline at an installation site.
Conventional pipeline construction is a multistep process beginning with the manufacture of linepipe, typically in 40 foot lengths, at a pipe mill. Next, the linepipe may be transported to a coating yard where the linepipe is coated for corrosion resistance. Finally, the coated linepipe is transported to an installation site where it is welded to form a continuous pipeline and laid into a trench that is backfilled. Such construction practices are labor intensive with numerous opportunities for injury and even fatality. Further, costs for transporting the linepipe can be very significant, particularly so when the pipe mill, coating yard, and installation site are great distances apart.
Embodiments of the present invention are directed to a modular reinforced pipeline fabrication system that seeks to overcome these and other limitations of the prior art.
A modular reinforced tubular fabrication system and associated methods are disclosed. In some embodiments, the fabrication system includes a caterpullar module having a caterpullar housed within a first iso-container, the caterpullar operable to receive a tubular and push the tubular through one or more modules downstream of the caterpullar module. The fabrication system further includes a winder module having a winder housed within a second iso-container, the winder operable to wrap the tubular received from the caterpullar module with reinforcing material to produce a reinforced tubular. The caterpullar module and the winder module are positioned at a site where the reinforced tubular is to be installed.
In some embodiments, the fabrication system includes a plurality of iso-containers positioned at a site where a reinforced pipeline is to be installed and equipment disposed within each of the plurality of iso-containers, the equipment operable to produce the reinforced pipeline. The equipment includes a caterpullar operable to receive a pipeline and push the pipeline through the equipment downstream of the caterpullar and a winder operable to wrap the pipeline with a reinforcing material to produce the reinforced pipeline.
In some embodiments, the fabrication method includes transporting a plurality of modules to a site where a reinforced tubular is to be installed, each of the modules comprising an iso-container housing equipment operable to fabric the reinforced tubular, positioning the modules at the site in a predetermined configuration, conveying a tubular through the modules using a caterpullar, the caterpullar housed within one of the plurality of modules, and wrapping the tubular with reinforcing material, whereby forming the reinforced tubular, with a winder housing within another of the plurality of modules.
Thus, embodiments described herein comprise a combination of features and characteristics intended to address various shortcomings associated with conventional pipeline construction. The various characteristics described above, as well as other features, will be readily apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments, and by referring to the accompanying drawings.
For a detailed description of the disclosed embodiments, reference will now be made to the accompanying drawings in which:
The following description is directed to exemplary embodiments of a modular reinforced pipeline fabrication system and associated methods. The embodiments disclosed should not be interpreted, or otherwise used, as limiting the scope of the disclosure, including the claims. One skilled in the art will understand that the following description has broad application, and that the discussion is meant only to be exemplary of the described embodiment, and not intended to suggest that the scope of the disclosure, including the claims, is limited to that embodiment.
Certain terms are used throughout the following description and the claims to refer to particular features or components. As one skilled in the art will appreciate, different persons may refer to the same feature or component by different names. This document does not intend to distinguish between components or features that differ in name but not function. Moreover, the drawing figures are not necessarily to scale. Certain features and components described herein may be shown exaggerated in scale or in somewhat schematic form, and some details of conventional elements may not be shown in interest of clarity and conciseness.
In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to . . . .” Also, the term “couple” or “couples” is intended to mean either an indirect or direct connection. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections. Further, the terms “axial” and “axially” generally mean along or parallel to a central or longitudinal axis, while the terms “radial” and “radially” generally mean perpendicular to the central or longitudinal axis.
Referring now to
Fabrication system 100 further includes a plurality of locking devices 120, shrouds 125, and leveling legs 130 best viewed in
One or more leveling legs 130 are positioned beneath each module 105 and adjusted to ensure modules 105 are level relative to the ground and to each other.
Shrouds 125 are coupled between adjacent modules 105 and/or at each end of fabrication system 100 to protect equipment 110 housed within iso-containers 115 and the reinforced tubular at varying stages of the fabrication process from surrounding environmental conditions.
The modularity of fabrication system 100 also enables flexibility of the fabrication process. For example, and referring again to
Fabrication system 100 enables wrapping of thin-walled liner pipe with a reinforcing material to produce a reinforced tubular at a site where the reinforced tubular is to be installed. The reinforced tubular may be used in a variety of applications, such as but not limited to a pipeline for conveying fluids, a mast for a yacht, a pillar for a wind turbine, or a pressure vessel. Regardless of the particular application, the liner pipe, reinforcing material, and fabrication system 100 are delivered to a site where system 100 wraps the liner pipe with reinforcing material to produce a reinforced tubular, which is then installed on site.
Preferably the liner pipe comprises a plurality of stainless steel pipe segments. As will be discussed below, the metallic liner pipe is joined by fabrication system 100 to form a continuous length of pipeline. Alternatively, the liner pipe may comprise a nonmetallic material, such as a polymer or plastic. In such embodiments, it may not be necessary to join lengths of the liner pipe at the installation site. Instead, a continuous length of liner pipe may be delivered to the installation site on a spool and dispensed as needed therefrom.
One advantage of nonmetallic liner pipe is that it weighs less than a metallic alternative. However, nonmetallic liner pipe may not be as strong as needed for some applications. In such embodiments, the axial strength of the nonmetallic liner pipe may be enhanced by the application of tensile members.
The reinforcing material preferably comprises martensitic steel strips pretreated to enable corrosion resistance and sand or grit blasted over all surfaces to enable adhesion to the liner pipe. In some embodiments, each martensitic steel strip is further coated with a fusion-bonded epoxy to resist surface corrosion and abrasion. In such embodiments, the portions of the martensitic steel strips that will form the outer layer of reinforcing material when applied to the liner pipe, and thus will be exposed to ambient conditions, are coated with fusion-bonded epoxy over their outer surface and adjacent edge surfaces while their inner surfaces are not coated. The fusion-bonded epoxy may be that manufactured by 3M Company, Jotun Powder Coatings, E.I. du Pont de Nemours and Company, or any other leading manufacturer of this material. The portions of the martensitic steel strips that will form the inner layers of reinforcing material when applied to the liner piper do not require coating with fusion-bonded epoxy and therefore are not coated.
As previously described, the liner pipe and reinforcing material are delivered with all modules 105 required for fabrication system 100 to an installation site. In the embodiment illustrated by
Prior to the wrapping process and assuming the liner pipe to comprise stainless steel pipe segments, the liner pipe is joined to form a continuous length of pipeline. The joining process is performed within preparation module 210. Lengths of liner pipe 240 are fed through inlet 165 of preparation module 210. Within preparation module 210, the lengths of liner pipe 240 are butt-welded end-to-end to form a continuous length of tubular or pipeline 245, which is then output from module 210 through its outlet 160. In some embodiments, liner pipe 240 has a six inch (152 mm) diameter and a length of approximately 20 feet (6 meters). In other embodiments, liner pipe 240 has a length that is approximately twice as long, or 40 feet (12 meters). Further, the lengths of liner pipe 240 are joined through welding to form a continuous pipeline 245 having a length of approximately 1,640 feet (500 meters).
Caterpullar module 215 receives pipeline 245 from preparation module 210. Caterpullar module 215 includes a caterpullar 250 that pulls pipeline 245 from preparation module 210 and essentially pushes pipeline 245 through the remaining modules 105 of fabrication system 100, excluding control room module 150. As such, caterpullar 250 controls the fabrication speed of system 100, absent limitations imposed by preparation module 210 and the supply of liner pipe 240 thereto. In preferred embodiments, including the illustrated embodiment, caterpullar 250 is a caterpullar manufactured by Bartell Machinery Systems, L.L.C., headquartered in Rome, New York.
Referring briefly to
Referring again to
Turning now to
Referring also to
After roll-forming, an adhesive is applied to the back of each reinforcing material strip to enable coupling of the reinforcing material strips to pipeline 245 passing through winder 270. In some embodiments, including the illustrated embodiment, the adhesive applied is tape. In other embodiments, however, the adhesive may be a paste or another equivalent type of adhesive.
Referring still to
After the adhesive is applied to the reinforcing material strips, the strips are coupled to pipeline 245. Angled rollers 320 are positioned such that each of the strips has a tangential trajectory of pipeline 245 upon reaching its point of application to pipeline 245. Further, in preferred embodiments, the points of application for the strips are axially offset some distance and circumferentially offset 180 degrees, both defined relative to a centerline of pipeline 245. The angular or circumferential offset enables a balancing of forces to pipeline 245 resulting from the application of reinforcing material 260 to pipeline 245 at two distinct locations. With strips roll-formed and properly positioned with adhesive applied to each, the strips are then applied directly to pipeline 245, yielding reinforced pipeline 265.
Reels 280, electrical cabinet 290, and tooling head 295 rotate about main shaft 275, and thus pipeline 245. The strips of reinforcing material 260 are wrapped around pipeline 245 in the same direction of rotation. Due to axial movement of pipeline 245 through winder 270 and rotation of tooling head 295 about pipeline 245, reinforcing material 260 is applied in a helically fashion to pipeline 245, as illustrated by
In embodiments wherein pipeline 245 comprises metallic pipe segments joined end-to-end, the wrapping process may be interrupted at regular intervals to enable manual application of copper braiding to pipeline 245 for the purpose of cathodic protection. As is well known in the industry, cathodic protection is used to inhibit corrosion of metallic components, such as but not limited to pipes and pipelines. In such embodiments, illustrated by
Referring again to
Finally, external coating module 235 receives reinforced pipeline 265 pushed by caterpullar 250 from curing module 220. External coating module 235 includes a coating applicator 350 which applies an external coating to reinforced pipeline 265 passing therethrough. The applied protective coating acts as a barrier between reinforced pipeline 265 and the surrounding environment, reducing the potential for corrosion of reinforced pipeline 265. In some embodiments, external coating module 235 further includes a heater operable to heat the external coating prior to application to reinforced pipeline 265. In the illustrated embodiment, coating applicator 235 is operable to wrap reinforced pipeline 265 with one or more layers of a protective coating, such as but not limited to plastic or polyurethane. Alternatively, the external coating may comprise a spray, and coating applicator 235 may be another type of apparatus operable to apply a spray, rather than a wrap.
Furthermore, in some embodiments, an optical fiber may be applied to outer surface of reinforced pipeline 265 prior to application of the external coating. Once the external coating is applied to reinforced pipeline 265, the optical fiber is embedded between reinforced pipeline 265 and the external coating. The optical fiber enables monitoring of some conditions of reinforced pipeline 265, e.g. strain and/or temperature, for the purpose of leak detection.
Control room module 230 enables remote monitoring and control of the fabrication process, in particular the processes performed within each of modules 105 without the need for personnel to be positioned therein. This functionality is enabled by equipment contained within electronic cabinet 290 of winder module 220 and similar cabinets within other of modules 105. In some embodiments, control room module 230 also enables video monitoring of the processed performed within one or more modules 105.
While various embodiments have been shown and described, modifications thereof can be made by one skilled in the art without departing from the spirit and teachings herein. The embodiments herein are exemplary only, and are not limiting. Many variations and modifications of the apparatus disclosed herein are possible and within the scope of the invention. For example, although the embodiments of a cavity pressure relief system described above are presented in the context of a bi-directional valve, the cavity pressure relief system is equally applicable to uni-directional valves as well. Moreover, the valve described herein is a ball valve. A cavity pressure relief system in accordance with the principles disclosed herein may also be applied to other types of valves which are actuatable between open and closed configurations. Accordingly, the scope of protection is not limited by the description set out above, but is only limited by the claims which follow, that scope including all equivalents of the subject matter of the claims.