CN114784708B - Composite cable installation method for newly-built jacket - Google Patents
Composite cable installation method for newly-built jacket Download PDFInfo
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- CN114784708B CN114784708B CN202210406529.8A CN202210406529A CN114784708B CN 114784708 B CN114784708 B CN 114784708B CN 202210406529 A CN202210406529 A CN 202210406529A CN 114784708 B CN114784708 B CN 114784708B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
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Abstract
The invention discloses a method for installing a composite cable of a newly-built jacket, which comprises the following steps: the cable comprises a cable drum, an anchor chain, a traction rope, a composite cable and a cable joint head thereof, a steel wire rope sliding cable, a sliding ring, a ground traction winch and a top tensioning device. The composite cable part comprises a composite cable integrating an auxiliary anode and a reference electrode, a slip ring, a hook wire-dividing cover and a cable joint at the two ends of the composite cable; the suspension part comprises a steel wire rope sliding rope for guiding and suspending the composite cable, an anchor point, a guide pulley and a ground winch; the traction part comprises a traction rope for drawing the composite cable in place, a rope joint, a guide pulley and a ground winch which is the same as the steel wire rope sliding rope. The installation method utilizes the steel wire rope as a guide sliding rope for installing the composite cable in place, adopts the winch to pull the composite cable in place, is suitable for installing the tension type ICCP composite cable in the onshore horizontal construction stage of the deepwater jacket, has strong applicability and simple and convenient installation, can reduce the construction risk, and is particularly suitable for the deepwater jacket.
Description
Technical Field
The invention relates to the technical field of composite cable installation of a jacket ICCP system, in particular to a composite cable installation method of a newly-built jacket.
Background
The tension type impressed current cathodic protection system is used as a common means for electrochemical protection, corrosion prevention and life prolongation of an ocean platform jacket. The method is mainly characterized in that an auxiliary anode and a reference electrode are integrally packaged on a composite cable with a built-in tensile load-bearing steel wire rope, and the composite cable is tensioned and installed by anchoring and tensioning the upper end and the lower end of a jacket so as to resist the transverse swing and fatigue fracture of the composite cable under extreme ocean working conditions. The tensioning type ICCP system can achieve vertical lowering and vertical tensioning on an in-service jacket platform at sea, but for a newly-built jacket, installation of underwater equipment such as a composite cable and the like needs to be completed in a land building stage, particularly for a horizontally-built deepwater jacket, the composite cable cannot be installed vertically, the composite cable can be installed horizontally only according to the posture of the jacket building stage, and the jacket is changed into a vertical service state along with the posture of the jacket after being righted by launching. In summary, for the horizontally-built deepwater jacket, a simple and feasible installation method with controllable risk is urgently needed to realize the installation of the composite cable in the jacket land construction stage.
Disclosure of Invention
The invention provides a method for installing a composite cable of a newly-built jacket, which aims to overcome the technical problem.
The invention discloses a method for installing a composite cable of a newly-built jacket, which comprises the following steps:
the method comprises the following steps: a cable drum working platform is built at the installation position of the composite cable (4) at the top of the jacket, and a temporary working platform or a scaffold is built at the bottom of the jacket corresponding to the installation position of the composite cable (4);
step two: arranging a plurality of detachable anchor points of the steel wire rope sliding ropes (1) on the jacket structure corresponding to the path of the composite cable (4) between the top of the jacket and the bottom of the jacket, wherein the detachable anchor points are used for the steel wire rope sliding ropes (1) to pass through so as to provide support for the sliding ropes;
step three: drawing the steel wire rope sliding rope (1) from the top of the jacket to the bottom of the jacket through anchor points along the way, and stretching the steel wire rope sliding rope (1) at the bottom of the jacket; the traction rope is pulled from the top of the jacket to the bottom of the jacket along with the steel wire rope sliding rope, and the traction rope does not pass through the anchor point;
step four: connecting a knot head at the tail end of a composite cable (4) with the head end of a traction rope (2), recovering the traction rope (2) from the bottom of a jacket, synchronously releasing the composite cable (4) by a cable drum, installing a slip ring (3) on the composite cable (4), hanging the slip ring (3) on a steel wire rope slip rope (1), recovering the traction rope (2) from the bottom of the jacket, simultaneously releasing the composite cable wound on the cable drum, and hanging the composite cable (4) below the steel wire rope slip rope (1) through a plurality of slip rings (3);
step five: after the composite cable (4) reaches a preset position at the bottom of the jacket, the head end of the composite cable (4) is fixed on a corresponding tensioning device at the top of the jacket, and the tail end of the composite cable (4) is fixed on a corresponding anchoring ear plate at the bottom of the jacket; hoisting the composite cable by using a hanging strip which is pre-arranged at the position of the limiting structure, enabling the composite cable (4) to be positioned in the limiting structure, and locking the limiting structure to complete the limiting of the composite cable (4) at the position; the hanging strip is disassembled, and other limiting structures are installed in the same way to complete the installation of all limiting structures of the composite cable (4);
step six: the composite cable (4) is tensioned according to the designed pre-tension using a tensioning device.
Further, the fourth step includes:
and in the pulling process of the composite cable (4), the composite cable (4) and the steel wire rope sliding cable (1) are relatively fixed by using the sliding ring (3).
Further, after the sixth step, the method further includes:
and (3) removing the tensioning device of the steel wire rope sliding rope (1) at the bottom working platform of the jacket, removing the pre-tension of the steel wire rope, further removing the steel wire rope sliding rope (1), and then recovering the traction rope.
Further, the third step includes:
-pulling the wire rope strop (1) from the jacket top to the jacket bottom using a surface winch;
the head end of the hauling cable is left on the cable drum platform, and the tail end of the hauling cable is hauled to the ground winch through the anchoring fixed pulley.
Further, the fourth step is to use a ground winch to recover the traction rope (2);
and step five, fixing the tail end of the composite cable (4) on a corresponding anchoring lug plate at the bottom of the jacket through an anchor chain.
Further, the number of the slip rings (3) arranged on the composite cable (4) is determined according to the stress analysis of the composite cable (4);
further, the tension of the steel wire rope sliding rope (1) and the tension of the traction rope (3) are determined according to stress analysis;
further, the hauling cable is a steel wire rope or a Kevlar rope.
The invention aims at the problem that the newly-built deepwater jacket foundation composite cable is installed on the land. The installation process is more convenient, the installation risk is reduced, and the installation cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of the arrangement of composite cables in an embodiment of the land installation method of composite cables for newly built platforms according to the present invention;
FIG. 2 is a schematic view of a composite cable installation process in an embodiment of the present invention; the illustrated state is that the steel wire rope is in place with a sliding rope and a traction rope;
FIG. 3 is a schematic view of a composite cable installation process in an embodiment of the present invention; the state shown in the figure is that the composite cable is pulled by a pulling rope;
FIG. 4 is a schematic view of a composite cable installation process in an embodiment of the present invention; the state shown in the figure is that the composite cable is pulled to be in place and tensioned;
FIG. 5 is a schematic view of a composite cable installation process in an embodiment of the present invention; the illustrated state is the removal of a steel wire rope, a traction rope and a slip ring;
FIG. 6 is a schematic illustration of a wireline winch installation in an embodiment of the present invention;
FIG. 7 is a schematic illustration of an embodiment of the present invention illustrating the installation of a cable-slide support structure;
FIG. 8 is an enlarged schematic view of a cable sheave support structure in an embodiment of the present disclosure;
FIG. 9 is a schematic view of a slip ring configuration in an embodiment of the present invention;
fig. 10 is a schematic drawing of a composite cable anchoring section pulling arrangement in an embodiment of the invention.
In the figure:
1. a steel wire rope is used for sliding; 2. a hauling rope; 3. a slip ring; 4. a composite cable; 5. a jacket; 6. lifting lugs; 7. and (6) anchoring points.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the composite cable 4 is installed, the pre-tensioned steel wire rope is used as a sliding rope, the composite cable 4 is hung on the pre-tensioned steel wire rope through the sliding ring 3, and the ground winch is used for drawing the composite cable 4 to be installed in place. The installation stage of the composite cable 4 is carried out after the construction of the main structure of the jacket 5 is completed and before the scaffold is dismantled.
As shown in fig. 1, 4 sets of composite cable-electrode systems are installed in the jacket-tensioned ICCP system, and as shown in fig. 2, the invention discloses a land installation method of a composite cable of a newly-built platform, which comprises the following steps:
the method comprises the following steps: and a cable drum working platform is built at the mounting position of the composite cable 4 at the top of the conduit frame, and a temporary working platform or a scaffold is built at the bottom of the conduit frame 5 corresponding to the position of the composite cable 4.
Because jacket 5 is too high, build the manual operation when work platform and scaffold frame facilitate the installation composite cable 4 to and cable drum work platform can place cable drum, be used for the wire rope cylinder and the haulage rope cylinder of strop.
Step two: and a plurality of steel wire rope sliding cable detachable anchor points 7 are welded on the structure of the jacket 5 corresponding to the path of the composite cable 4 between the top of the jacket 5 and the bottom of the jacket 5, and lifting lugs 6 and D-shaped shackles are adopted for the steel wire rope sliding cables 1 to pass through so as to provide support for the steel wire rope sliding cables. Specifically, a lifting lug 6 is welded at the top, and the steel wire rope sliding rope 1 supporting structure is formed by connecting the lifting lug 6 with a D-shaped shackle.
Step three: drawing the steel wire rope sliding rope 1 from the top of the jacket 5 to the bottom of the jacket 5 through anchor points along the way, and tensioning the steel wire rope sliding rope 1 at the bottom of the jacket; the traction rope is pulled from the top of the jacket to the bottom of the jacket along with the steel wire rope sliding rope, and the traction rope does not pass through the anchor point. In the embodiment, a ground winch is used for drawing the steel wire rope sliding rope 1 from the top of the jacket 5 to the bottom of the jacket 5, one end of the steel wire rope sliding rope 1 is fixed at the top of the jacket through a lifting lug 6, and the other end of the steel wire rope sliding rope is drawn through the ground winch; the head end of the hauling cable is left on the cable drum platform, and the tail end of the hauling cable is hauled to the ground winch through the anchoring pulley. The traction rope is a steel wire rope and is dragged on the same winch with the sliding rope steel wire rope, and the ground winch is a double-winch.
Specifically, as shown in fig. 6, the winch is arranged on the ground at one end of the bottom of the jacket 5, the ground winch is connected with the hauling rope, and the other end of the hauling rope is connected with the composite cable arranged on the cable drum; preferably, the ground winch tractive force required will also be different for different cable inclination angles. The steel wire rope sliding rope 1 is anchored with the jacket 5 and tensioned, and is connected with the jacket 5 through a D-shaped shackle; the jacket 5 is provided with a plurality of lifting lugs 6 and D-shaped shackles to ensure that the sliding cable steel wire rope is completely lifted; as shown in fig. 10, the head end of the hauling cable is left on the cable drum platform, and the tail end of the hauling cable is hauled and recovered to the ground winch through the anchoring pulley for subsequent use.
Step four: as shown in fig. 3, a hauling rope 2 is hung on the steel wire rope sliding rope 1 through a slip ring 3, a knot head at the tail end of a composite cable 4 is connected with the head end of the hauling rope 2, the composite cable 4 is hung on the sliding rope through a hook, the hauling rope 2 is hauled and recovered through a ground winch on the ground, and the composite cable 4 is pulled to move along the steel wire rope sliding rope. Preferably, in the fourth step, the slip ring 3 is used to relatively fix the composite cable 4 and the steel wire rope 1 during the pulling process of the composite cable 4. Preferably, the traction ropes 2 are hauled in particular using a ground winch.
Specifically, a traction rope 2 penetrates through a slip ring 3 to be hung on a steel wire rope slide rope 1 to prevent the traction rope 2 from sagging, the tail end of the traction rope 2 is connected with a ground winch, and the head end of the traction rope 2 is connected with a knot head at the tail end of a composite cable 4 arranged on a cable drum platform; starting a ground winch, pulling the composite cable 4 to move towards the bottom of the jacket 5 along the steel wire rope sliding rope by the traction rope 2, installing a sliding ring 3 at one end of the composite cable 4 at intervals in the moving process, connecting the sliding ring 3 with a hook, and hanging the composite cable 4 on the steel wire rope sliding rope 1 through the hook; preferably, one slip ring 3 is fixedly installed every 10 m; preferably, as shown in fig. 9, the slip ring 3 includes two opposite hook plates, and the composite cable 4 is fixed between the arc surfaces of the two hook plates by fastening bolts.
As shown in fig. 7 and 8, when the slip ring 3 and the hook move to the support structure of the steel wire rope slip 1, the slip ring 3 is not stressed any more in order to facilitate the slip ring 3 and the hook to temporarily support the composite cable 4 through the support structure of the steel wire rope slip 1 by the bottom support; an operator hangs the slip ring 3 and the hook from one side of the supporting structure of the steel wire rope slip 1 to the other side; the temporary bottom support is then removed and the composite cable 4 continues to be pulled to ensure normal movement of the composite cable 4.
Step five: as shown in fig. 4, after the composite cable 4 reaches a preset position, the head end, i.e., the tensioning end socket head, of the composite cable 4 is fixed on the lifting lug 6 of the tensioning device corresponding to the top of the jacket 5, and the tail end of the composite cable 4 is fixed on the anchoring ear plate corresponding to the bottom of the jacket 5; hoisting the sling arranged at the position of the limiting structure in advance to enable the composite cable 4 to be positioned near the limiting structure, and closing and locking the limiting structure at the position of the composite cable 4 hoisted by the sling; and (4) dismounting the hanging strip, and mounting other limiting structures in the same way to finish the mounting of the limiting structure of the composite cable 4. Preferably, the tail end of the composite cable 4 is fixed on the corresponding anchoring ear plate at the bottom of the jacket 5 through an anchor chain, and pretension is applied to enable the composite cable to resist the impact force of sliding and launching of the jacket.
Specifically, after the composite cable 4 reaches the preset position, the traction rope 2 is recovered through a ground winch, and the composite cable 4 is fixedly connected to the jacket 5.
Specifically, the composite cable drum is hoisted to the working platform, and the base of the composite cable drum working platform is welded, so that the stability and reliability of the cable drum in the installation process of the composite cable are guaranteed.
Step six: the composite cable 4 is tensioned by the tensioning device according to the pre-tension, so that the use requirement is met.
Preferably, as shown in fig. 5, after the sixth step, the method further includes: and (3) removing the tensioning device of the steel wire rope sliding rope 1 at the bottom working platform of the jacket 5, removing the pre-tension of the steel wire rope, further removing the steel wire rope sliding rope 1, and then recovering the traction rope.
Specifically, after the composite cable 4 is in place and tensioned, the tensioning device of the steel wire rope sliding rope 1 at the bottom working platform of the jacket 5 is removed, the tensioning force of the steel wire rope sliding rope 1 is removed, a hook hung on the steel wire rope sliding rope 1 is loosened, the steel wire rope sliding rope 1 falls to the lower side of the composite cable 4, the steel wire rope sliding rope 1 is pulled out of the hook at the anchoring end, and the traction rope 2 and the steel wire rope sliding rope 1 are removed and recovered.
The invention has the beneficial effects that:
1. the horizontal installation of the tension type ICCP composite cable 4 on the horizontally-built jacket is realized, the installation process is more controllable, and the accidental falling risk of the composite cable is reduced.
2. The steel wire rope sliding rope is used as a path, the composite cable is pulled by a winch to be installed in place, the composite cable can accurately penetrate through the supporting structures of all horizontal layers in a three-dimensional space, and deflection of the composite cable caused by self weight in the horizontal installation process is resisted.
3. The installation method has strong applicability, is suitable for horizontally constructed jacket foundations of various water depths, and is particularly suitable for deep-water jacket platforms with the depth of 300 meters.
4. The method solves the problem that the composite cable is horizontally installed in place on the basis of horizontally building the jacket, and lays a foundation for promoting the application of the tension type ICCP system in the cathodic protection of a newly built jacket.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A composite cable installation method for a newly-built jacket is characterized by comprising the following steps:
the method comprises the following steps: a cable drum working platform is built at the installation position of the composite cable (4) at the top of the jacket, and a temporary working platform or a scaffold is built at the bottom of the jacket corresponding to the installation position of the composite cable (4);
step two: arranging a plurality of detachable anchor points of the steel wire rope sliding ropes (1) on a jacket structure corresponding to a path through which the composite cable (4) passes between the top of the jacket and the bottom of the jacket, wherein the detachable anchor points are used for the steel wire rope sliding ropes (1) to pass through so as to provide support for the sliding ropes;
step three: drawing the steel wire rope sliding rope (1) from the top of the jacket to the bottom of the jacket through anchor points along the way, and tensioning the steel wire rope sliding rope (1) at the bottom of the jacket; the traction rope is pulled from the top of the jacket to the bottom of the jacket along with the steel wire rope sliding rope, and the traction rope does not pass through the anchor point;
step four: connecting a knot head at the tail end of a composite cable (4) with the head end of a traction rope (2), recovering the traction rope (2) from the bottom of a jacket, synchronously releasing the composite cable (4) by a cable drum, installing a slip ring (3) on the composite cable (4), hanging the slip ring (3) on a steel wire rope slip rope (1), recovering the traction rope (2) from the bottom of the jacket, simultaneously releasing the composite cable wound on the cable drum, and hanging the composite cable (4) below the steel wire rope slip rope (1) through a plurality of slip rings (3);
step five: after the composite cable (4) reaches a preset position at the bottom of the jacket, the head end of the composite cable (4) is fixed on a corresponding tensioning device at the top of the jacket, and the tail end of the composite cable (4) is fixed on a corresponding anchoring ear plate at the bottom of the jacket; hoisting the composite cable by using a hanging strip which is pre-arranged at the position of the limiting structure, enabling the composite cable (4) to be positioned in the limiting structure, and locking the limiting structure to complete the limiting of the composite cable (4) at the position; the hanging strip is disassembled, and other limiting structures are installed in the same way to complete the installation of all limiting structures of the composite cable (4);
step six: the composite cable (4) is tensioned according to the designed pre-tension using a tensioning device.
2. The method of claim 1, wherein said step four comprises:
and in the pulling process of the composite cable (4), the composite cable (4) and the steel wire rope sliding cable (1) are relatively fixed by using the sliding ring (3).
3. The method of claim 1, wherein after the sixth step, further comprising:
and (3) removing the tensioning device of the steel wire rope sliding rope (1) at the bottom working platform of the jacket, removing the pre-tension of the steel wire rope, further removing the steel wire rope sliding rope (1), and then recovering the traction rope.
4. The method according to any one of claims 1 to 3, wherein step three comprises:
-pulling the wire rope strop (1) from the jacket top to the jacket bottom using a surface winch;
the head end of the hauling cable is left on the cable drum platform, and the tail end of the hauling cable is hauled to the ground winch through the anchoring fixed pulley.
5. Method according to any of claims 1 to 3, characterized in that said step four consists in recovering the traction ropes (2) using a ground winch;
and step five, fixing the tail end of the composite cable (4) on a corresponding anchoring lug plate at the bottom of the jacket through an anchor chain.
6. Method according to claim 1, characterized in that the number of slip rings (3) mounted on the composite cable (4) is determined from a force analysis of the composite cable (4).
7. Method according to claim 1, characterized in that the tension of the rope (1) and the tension of the traction rope (3) are determined on the basis of force analysis.
8. The method of claim 1, wherein the hauling cable is a wire rope or a Kevlar rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406529.8A CN114784708B (en) | 2022-04-18 | 2022-04-18 | Composite cable installation method for newly-built jacket |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210406529.8A CN114784708B (en) | 2022-04-18 | 2022-04-18 | Composite cable installation method for newly-built jacket |
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| CN114784708B true CN114784708B (en) | 2022-11-08 |
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| GB201418974D0 (en) * | 2014-10-24 | 2014-12-10 | Kobus Services Ltd | Winch |
| CN108286249B (en) * | 2018-01-09 | 2024-08-13 | 大连科迈尔海洋科技有限公司 | Tensioning type impressed current cathodic protection system and installation and arrangement method thereof |
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| JP2002010423A (en) * | 2000-06-16 | 2002-01-11 | Aichi Corp | Cable towing device |
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| CN114784708A (en) | 2022-07-22 |
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