WO2022066209A1 - Système de tubage et procédé de renforcement et de réparation de pipeline - Google Patents

Système de tubage et procédé de renforcement et de réparation de pipeline Download PDF

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Publication number
WO2022066209A1
WO2022066209A1 PCT/US2021/018141 US2021018141W WO2022066209A1 WO 2022066209 A1 WO2022066209 A1 WO 2022066209A1 US 2021018141 W US2021018141 W US 2021018141W WO 2022066209 A1 WO2022066209 A1 WO 2022066209A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeline
casing
repair
reinforcement
steps
Prior art date
Application number
PCT/US2021/018141
Other languages
English (en)
Inventor
Jose CAJIGA
Arturo Villar
Vincente VILLAR
Alexandra CAJIGA
Original Assignee
Cajiga Jose
Arturo Villar
Villar Vincente
Cajiga Alexandra
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/029,287 external-priority patent/US20210003241A1/en
Application filed by Cajiga Jose, Arturo Villar, Villar Vincente, Cajiga Alexandra filed Critical Cajiga Jose
Publication of WO2022066209A1 publication Critical patent/WO2022066209A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
    • F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

Definitions

  • the present invention refers, generally, to a casing system used as a reinforcement and repair for pipelines, and more specially a casing system used as a reinforcement and repair for hydrocarbon conducting pipelines and its accessories like valves flanges or others.
  • the present system and method includes a casing, connecting elements between the casing and the conducting pipeline, thereby forming an annular gap between the pipeline and the casing, penetrators or couplings in the body of the casing for the injection of a resin, and a seal and joining element installed through mechanical means between the main body of the casing with the pipeline.
  • the invention belongs, generally, to the field of providing reinforcements for conducting pipelines, which may have suffered a thinning or lessening of the wall thickness as a result of corrosion caused by the environment, erosion and the mechanical means or have suffered mechanical damage caused in turn by one of these elements, or other factors.
  • An additional disadvantage is that by making peripheral welding bindings between the casing and the conducting pipeline when the pipelines are submerged require equipment for applying hyperbaric welding and sophisticated procedures for completing the welding. [0012] Due to the aforementioned disadvantages the invention has proposes to provide a casing system as a reinforcement or repair for pipelines which overcomes the disadvantages of known systems, while providing evident and additional economic and technical advantages.
  • one important aspect of the invention is to have a repair system (of a permanent type) of conduits /pipelines, whether terrestrial or subaquatic, with great advantages over the already known repairing systems, mentioned previously.
  • the invention generally includes a casing for pipelines of any diameter and thickness, with the object of reinforcing them. This is achieved through an assembly of carbon steel rolled casings or of any type of steel (equal or compatible to the specification of the pipeline to be repaired) as an envelope covering the pipeline but leaving an annular gap between the pipeline and the casing in which after being installed, the casing is formed in between the pipeline by means of welding and is provided in the ends of the casing, with mechanical heads which are installed by means of screws to the casing and provide the seal which is required between the casing and the conducting tube, these heads are bipartite and have a system for tightening the head against the conducting pipeline to avoid any possible displacement, then it is injected a resin produced from polymers, copolymers or any type, which have the required mechanical properties depending on the operation pressure and the particular characteristics of the pipeline, to achieve that the assembly is 100% integrated to the pipeline and the casing, forming a single compound assembly for the tubing, the resin and the casing.
  • This casing system is not limited to be used only in the lineal parts of the duct, but it can be used in the changes of geometry of the pipeline, for example and without being limited to, in the elbows of any radius and dimensions, in the intersections between the "T" and "Y” type pipelines, etc. Pursuing and complying in all cases with the same main objectives of the invention.
  • This casing system is not limited to be used only to reinforce a pipeline itself, but can also be employed to encapsulate a previous temporary bolted clam installed over the damage on the pipe, or to be installed over a damage Valve or flange that is part of the pipe line. In sum, the arrangement of the casing can occur over any portion of the pipeline, including the pipeline itself, or those portions of the pipeline that have been repaired previously, or those sections that include valves, flanges or other structural constructs.
  • the invention consists of a casing for pipelines of any diameter, thickness and length, with the object of reinforcing them, and for restituting or even overcoming their original design conditions.
  • the repair envelope or casing of the present invention can be formed by one, two or more semicircular sections depending on the length and place of the section of the pipeline to be repaired, as well as the access and the ease for its assembly. It should be noted, however, that the outer periphery of the casings may be of any shape of configuration without departing from the broader aspects of the present invention. Moreover, in any of the embodiment of the present invention, only in the ends of the casing will be screwed the heads which serve as union between the casing and the pipeline. The geometry of this assembly can be varied depending of the conditions and characteristics of the pipeline to be repaired.
  • the casing has one, two or more couplings for the injecting of resin in the annular gap, and these can be located in any part of the body of the casing depending on each particular case, since the conditions of the injection change if the pipeline is placed in a vertical, horizontal or inclined position, or simply for the easy access to the joints.
  • the resin has the object of serving as a mean for integrating a pipeline to the casing as a single assembly, resulting from this a section comprised by the pipeline, the resin and the casing, obtaining in this form the assembly thus formed, a greater resistance that the resistance of the original design of the pipeline.
  • the injected resin in the annular space has a second main function and can have different physical properties such as being insulating, such as having a high resistance to abrasion, etc. being this an important possibility to resolve or attack the problem that originally caused damage to the pipeline.
  • the present system and method enables repairs of a permanent type to pipelines in their lineal parts, and in their changes of geometry, without having to take them out of operation with the great economical advantage that this represents.
  • the present invention has better feasibility of utilization for repairing the pipelines due to the fact that the casing is not in initial structural contact with the pipeline which is to be repaired, which is not possible with the traditional enveloping method.
  • the present invention also has the feasibility to be installed over a bolted clamp or valve, that is part of the pipeline, due to the fact that the casing can be installed to encapsulate any member and the resin injected in the annular space, regardless of the contour or other mechanical adaptations located on the pipeline itself.
  • the invention ensures a substantially 100% contact between the damaged pipeline and the casing by means of a resin injected in the annular ring formed between the outer periphery of the pipeline and the inner surface of the casing /envelope.
  • the present system and method does not require that the operation pressure of the pipeline be lowered to carry out the assembly between the casing and the conductive pipeline.
  • the proposed system permits also the time reduction of the installation of the casing over the pipeline, and the casing system can be installed underwater without having to carry out welding union between the casing and the conducting pipeline to fix the casing to the pipeline.
  • the proposed system permits also to be installed over a provisional bolted clamp installed on the pipe used to stop a leak or over a valve assemble that needs to be encapsulated to stop a leak. Or, to encapsulate a flange or any other accessories that may be part of the pipeline and need to be repaired.
  • Figure 1 is a lateral view and a longitudinal section showing in a schematic form the pipeline, the resin and the casing or enveloping.
  • Figure 2 is a lateral view of the casing and of the pipeline section.
  • Figure 3 is a top view and cross section of the section formed by the pipeline, the resin and the enveloping of the casing.
  • Figure 4 is a lateral and a section of the mechanical union element between the casing and the pipeline as well as a lateral view of the penetrators for the injection of the resin.
  • Figure 5 is a top view of the casing with elbows in the pipelines.
  • Figure 6 is a top view of the "T" casing on the pipelines.
  • Figure 7 is a lateral view of the casing and the pipeline section.
  • Figure 8 is a lateral view and longitudinal cross section showing in a schematic form the pipeline, the bolted clamp, the resin, the injection ports and the casing or enveloping.
  • Figure 9 is a lateral view and longitudinal cross section showing in a schematic form the pipeline, a valve, the resin and the casing or enveloping.
  • Figure 10 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 11 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 12 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 13 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 14 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 15 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 16 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 17 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 18 is a schematic view of a pipeline repair according to an embodiment of the invention.
  • Figure 19 is a flow chart for a method of implementation of an embodiment of the invention.
  • Figure 1 illustrates a longitudinal section view of the pipeline repair and reinforcement system, according to one embodiment of the present invention.
  • a conducting pipeline /conduit 1 is intended for repair with the envelope /casing 2, the mechanical union element head 3 and the O-ring type seal 5 which is housed between the mechanical union element and the conducting pipeline.
  • the specific resin chosen will be selected on the composition and environmental conditions of the pipeline to be repaired, without departing from the broader aspects of the present invention. Moreover, by filling in the annular space between the pipeline section to be repaired and the outer casing disposed therearound, the present invention ensures that the entirety of the inner surface of the casing assuredly contacts, via the injected resin, the entirety of the outer periphery of the pipeline in the area that is to be repaired.
  • known pipeline repairs have no way of ensuring that the entirety of the outer periphery of the damaged pipeline, or the periphery of any element, valve, flange or others installed in the area to be repaired, will be in contact with the repairing casing. Indeed, as the outer periphery of the pipeline is effectively never uniform in contour or diameter, it is axiomatic that known pipeline repair systems cannot provide supportive contact to the entirety of the outer periphery of the pipeline via the repairing shell of the casing.
  • the present invention provides a means and method for the supportive nature of the casing 2 to be imparted to the entirety of the damaged portion of the pipeline.
  • the present invention accomplishes this by injecting the resin, via ports 7, into the substantially annular space formed between the casing and the pipeline. In this manner, and regardless of changes in contour or diameter, the present invention ensures that the damaged portion of the pipeline contacts and enjoys the structural support of the casing over its entire outer periphery / surface.
  • Figure 2 which is a longitudinal lateral view, it is shown the outer appearance of casing 2 and of the pipeline 1.
  • the main body of the casing 2 is preferably in two sections but may be of any number without departing from the broader aspects of the present invention.
  • the present invention not only suggests the use of a two-piece casing that is to be welded to itself along dual axial lines, apart from the outer surface of the pipeline, but equally contemplates a since piece casing.
  • the casing With a single-piece casing, the casing is 'slipped' over the affected portion of the pipeline via a single, axial split line opening, and after suitable peripheral constriction, the single seam is welded in the same nature as when a two-piece casing is utilized.
  • the joining element 3 between the casing 2 and the pipeline 1 the ports 7 for the injection of resin 4, as well as the joining welding 6 for integrating or forming the casing around the pipeline.
  • Figure 3 is a cross section top view of the middle area of the casing.
  • Figure 3 therefore illustrates the three elements which essentially form a repaired pipeline, which are the pipeline 1, the resin 4, which is located in the space between the casing and the pipeline 1, and the main body of the casing 2.
  • Figure 4 shows the union elements between the casing 2 and the pipeline 1, the couplings /ports 7, the welding between the main body of the casing 2 and the welded base as an integrated part of the casing for receiving the mechanical union element /cap 3 which, preferably, is installed with the use of screws.
  • cap 3 may be threaded into an interfacing end of casing 2 compressing an o-ring type seal 5.
  • Figure 5 shows one embodiment of the invention of how the casing 2 can be formed by two or more semicircular sections enveloping the pipeline 1.
  • Figures 6 illustrate the use of the present invention, with pipelines /casings having "T", or angled, configurations.
  • casing 2 may be a unitary piece slip fit over a first pipe 1 that is connected to additional casing pieces to form the repair piece.
  • the unitary piece may further be integrated with a mating half of a casing piece for the perpendicular pipe, thus reducing the number of union welds 6 necessary to form the envelope 2.
  • Figure 7 illustrates a lateral external view of the use of the present invention installed over a bolted clamp previously installed on the pipe.
  • This shows how one embodiment of casing 2 can be shaped to allow encapsulate an element, valve, flange, that is part of the pipeline.
  • Figure 8, likewise, illustrates the cross- sectional view of Figure 7.
  • ports 7 may be placed to target areas of particularly difficult flow geometry around an embedded fitting, thus ensuring full penetration of the resin 4 into the lateral space and full contact with the all surfaces of the conducting pipeline 1 and fitting.
  • Figure 9 is a lateral view and longitudinal cross section showing in a schematic form the pipeline 1, a valve, the resin 4 and the casing or envelope 2.
  • FIG. 10-18 An alternative embodiment and particular use of the present invention involves the repair /reinforcement of ascending pipelines 8 of marine platforms 9.
  • Such environments are particularly of concern as ascending pipelines, typically carrying gas or liquid hydrocarbons, are subject to swells and tides and therefore suffer a high grade of corrosion due to the abrasive effect of these tides.
  • the content of chlorides and the high grade of oxygenation of the marine water in such areas, as well as the constant spray of salts in the non-submerged splatter area of the pipeline can accelerate corrosion of such ascending pipelines.
  • one important application of the present invention is in the areas and conditions of just such aggressive environments, including when the pipelines are operated in the range of temperature of ⁇ 0-200 °C.
  • the present system and method provide many advantages over known repair and reinforcement systems, especially in relation to ascending pipelines.
  • the present system and method will structurally reinforce any damaged portion of such an ascending pipeline, working as only one assembly.
  • the injected resin, or other isolating material effectively and thermally separates the casing from the conducting pipeline, obtaining with this that the outer wall of the casing works at a temperature much lower than that of the pipeline.
  • the present invention also and equally contemplates electrically insolating a damaged pipeline through the use of dielectric materials for manufacturing the screwable head of union between the casing and the pipeline, effectively making the main body of the casing electrically isolated from the pipeline. In this manner, it is possible to ensure that materials can be selected with different cathode potentials for making the body of the casing and not generating a galvanic potential between the casing and the pipeline.
  • the present invention utilizes a casing, preferably with the same general specifications as the pipeline to be repaired, of variable length and positioned so as to evidence an annular gap between the pipeline and the casing, and including a screwed head system at the ends of the casing, which serve for making a seal and sealing the annular gap between the pipeline and the casing and into which a resin or another material based on polymers, copolymers, or any type of material is injected.
  • the present invention can effectively act as and produce a thermic isolation between the pipeline and the outer wall of the casing which is going to be in direct contact with the environment.
  • the working temperatures are radically lowered and the corrosion rates are lowered in the system as a whole, besides permitting to carry out the work out of the outer coating in a suitable form.
  • Shown in Figures 10-18 is a schematic cross section of a marine platform 9 with an associated ascending pipeline 8.
  • ascending pipeline 8 is functionally similar to conducting pipeline 1 if not, in some instances, structurally similar.
  • the ascending pipeline 8 transitions from an atmospheric zone above the waterline 10 to a submerged zone below the waterline.
  • initial casing 11 is moved below waterline 10 as second casing 12 with joining welding 6 is formed around ascending pipeline 8.
  • initial casing 11 and second casing 12 are joined with another joining welding 6 to form a larger casing 2.
  • a third casing 13 formed similarly to initial casing 11 and second casing 12 is formed around ascending pipeline 8 and directed towards the larger casing 2.
  • third casing 13 is shown integrated with the initial and second casings to form the overall envelope 2 similar in construction as described above.
  • the casing is shown centered over a repair area that bridges above and below waterline 10.
  • Figure 15 illustrates the installation of cap 3 at the top of casing 2.
  • Port 7 may be formed and welded to casing 2 or pre-formed as part of the initial casing formation process as above described. Since casing 2 was assembled above the waterline and then submerged below before final integration into a single piece via joining welding 6, one of ordinary skill will appreciate that the annular space formed between the interior of the casing 2 and ascending pipeline 8 would potentially be filled with seawater.
  • pressurized gas is introduced into the annular space via port 7 to flush out the seawater and maintain a submerged water level 14.
  • any pure or mixed inert gas supply such as air, argon, or nitrogen is suitable for this purpose.
  • the moisture content of the air may be further decreased in order to facilitate more rapid drying of the annular space.
  • an additional cap 3 with o-ring type seal 5 is installed at the base of casing 2, thus preventing further intrusion of water into the annular space.
  • the additional cap 3 is configured differently from the initial cap 3 (e.g., one may be threaded, the other a screw-type).
  • an example method of pipeline repair in a marine platform environment may comprise the following steps:
  • the cleaning and preparation may be as large as 20 feet above or below the waterline.
  • This cleaning and preparative area is variable in size and scaled as necessary to the conditions at hand (e.g., size of repair, splash zone size, tidal swell, overall pipeline condition, etc.).
  • Weld quality inspection may be accomplished using x-rays, penetrating liquids, dyes, ultrasonics, eddy currents, or any other means of assuring weld quality. Weld inspections may be performed after each casing piece is integrated. Weld inspections may also additionally be conducted when the unitary casing is completely formed.
  • step R otherwise skip to step S.
  • R Inject inert gas mixture into annular space formed between envelope and pipeline.
  • Caps may be welded into place, or installed as screw caps, plugs, etc.
  • the casing may form a removable mould that is removed after resin cure.
  • the wall of the casing facing the annular space and the surface of the pipeline may be pre-coated with a release compound enabling mould removal after resin hardening.
  • the present invention enables an unending choice of resins that may be injected therein, including those manufactured from polymers, copolymers or any material which is insolating or with other physical properties and which has or not mechanical properties for complying a structural function, without reservation;
  • An outer coating of the casing may be applied, which can be of any type. That can be among others without limitation to: the use of epoxy resins, elastomers based on natural or synthetic rubber, polyurethane elastomers, anticorrosive paints, etc.;

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)

Abstract

L'invention concerne un système destiné à la réparation ou au renforcement d'un pipeline, le système comprenant un tubage présentant une dimension apte à pour envelopper une partie endommagée du pipeline, afin de définir un espace entre une surface intérieure du tubage et une périphérie extérieure du pipeline. Un orifice d'injection est positionné le long du tubage et se trouve en communication sélective avec l'espace. Un ensemble obturateur est fixé par friction au tubage et au pipeline, puis un matériau injectable est injecté de manière sélective à travers l'orifice d'injection jusqu'au remplissage sensiblement d'une totalité de l'espace.
PCT/US2021/018141 2020-09-23 2021-03-10 Système de tubage et procédé de renforcement et de réparation de pipeline WO2022066209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17/029,287 2020-09-23
US17/029,287 US20210003241A1 (en) 2016-03-09 2020-09-23 Casing system and method for pipeline reinforcement and repair

Publications (1)

Publication Number Publication Date
WO2022066209A1 true WO2022066209A1 (fr) 2022-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2021/018141 WO2022066209A1 (fr) 2020-09-23 2021-03-10 Système de tubage et procédé de renforcement et de réparation de pipeline

Country Status (1)

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WO (1) WO2022066209A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954288A (en) * 1974-03-13 1976-05-04 The Pipe Line Development Co. Pipe fitting with self-testing seals and method
US5079824A (en) * 1988-09-02 1992-01-14 Lopez Jesus S Method for the installation of a jacket reinforcement for piping
US20040129373A1 (en) * 2002-09-17 2004-07-08 Nadarajah Nagendran A/L C. Method and means of repairing a pipe
US20060065320A1 (en) * 2004-09-29 2006-03-30 Borland Robin N Pipeline repair system and method of installation
US20170261146A1 (en) * 2016-03-09 2017-09-14 Jose A. Cajiga Casing system and method for pipeline reinforcement and repair

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954288A (en) * 1974-03-13 1976-05-04 The Pipe Line Development Co. Pipe fitting with self-testing seals and method
US5079824A (en) * 1988-09-02 1992-01-14 Lopez Jesus S Method for the installation of a jacket reinforcement for piping
US20040129373A1 (en) * 2002-09-17 2004-07-08 Nadarajah Nagendran A/L C. Method and means of repairing a pipe
US20060065320A1 (en) * 2004-09-29 2006-03-30 Borland Robin N Pipeline repair system and method of installation
US20170261146A1 (en) * 2016-03-09 2017-09-14 Jose A. Cajiga Casing system and method for pipeline reinforcement and repair

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