CN111893491A - Jacket tensioning type corrosion prevention system and installation method - Google Patents
Jacket tensioning type corrosion prevention system and installation method Download PDFInfo
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- CN111893491A CN111893491A CN202010898383.4A CN202010898383A CN111893491A CN 111893491 A CN111893491 A CN 111893491A CN 202010898383 A CN202010898383 A CN 202010898383A CN 111893491 A CN111893491 A CN 111893491A
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- rope
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- fixing device
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/18—Means for supporting electrodes
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention provides a jacket tensioning type corrosion prevention system and an installation method, wherein the jacket tensioning type corrosion prevention system comprises the following steps: jacket, first compound cable, first fixing device and second fixing device are provided with supplementary positive pole and/or first reference electrode on the first compound cable, and first fixing device one end is connected with first compound cable upper end, and first fixing device's the other end is connected with the main leg of jacket, and second fixing device is connected with first compound cable lower extreme, and first fixing device includes: a first rope, a second rope and a first connecting piece; the upper end of the first composite cable is connected with one end of the first rope and one end of the second rope through the first connecting piece, and the other ends of the first rope and the second rope are connected with the main leg. According to the invention, the upper end of the first composite cable is tensioned through the first rope, the second rope and the first connecting piece, and the traditional tensioning device is replaced, so that the construction steps are reduced, the offshore construction period, the construction cost and the construction difficulty are reduced, and meanwhile, the construction risk is reduced.
Description
Technical Field
The invention relates to the field of ocean platform corrosion prevention, in particular to a jacket tensioning type corrosion prevention system and an installation method.
Background
The existing ocean platform anti-corrosion method mainly comprises the steps that an auxiliary anode is arranged on a composite cable, the upper end of the composite cable is connected with a tensioning device, the lower end of the composite cable is connected with a larger heavy lump, and the composite cable is tensioned through the tensioning device and the heavy lump to realize the stretching of the auxiliary anode; and to the condition that there is freezing in cold sea area, when utilizing above-mentioned mode to carry out the tensile of positive pole, when the ice sheet is thick, and when moving, compound cable is very easily receive the scratch extrusion of ice sheet in the horizontal direction and leads to compound cable to damage, or produces great amount of deflection, produces collision and interference with the jacket to, overspeed device tensioner and heavy manufacturing cost, installation cost and the cost of maintenance who sticks together are high, especially heavy weight that sticks together is great difficult for transporting.
Disclosure of Invention
The invention provides a jacket tensioning type corrosion prevention system, which aims to overcome the technical problem.
The invention provides a jacket tensioning type corrosion prevention system, which comprises: a jacket and a composite cable fixing unit, the composite cable fixing unit including: the device comprises a first composite cable, a first fixing device and a second fixing device, wherein an auxiliary anode and/or a first reference electrode are/is arranged on the first composite cable, one end of the first fixing device is connected with the upper end of the first composite cable, the other end of the first fixing device is connected with a main leg of a jacket, the second fixing device is connected with the lower end of the first composite cable, and the first composite cable is tensioned through the first fixing device and the second fixing device;
the first fixing device includes: a first rope, a second rope and a first connecting piece; the upper end of the first composite cable is connected with one end of the first rope and one end of the second rope through a first connecting piece, and the other end of the first rope and the other end of the second rope are fixedly connected with the outer wall of the main leg.
Further, still include: a second composite cable; the second composite cable is arranged on the outer wall of the main leg, and a second reference electrode is arranged on the second composite cable.
Further, still include: and the third reference electrode is fixedly connected with the outer wall of the main leg.
Further, the second fixing device includes: a third rope, a fourth rope and a second connecting piece;
the lower end of the first composite cable is connected with one ends of the third rope and the fourth rope through second connecting pieces respectively, and the other ends of the third rope and the fourth rope are fixedly connected with the outer wall of the main leg.
Further, the second fixing device includes: heavy stick together and second connecting piece, heavy stick together through the second connecting piece with first compound cable lower extreme is connected.
Further, the second fixing device is a lifting lug, the lifting lug is fixed on the outer wall of the main leg, and the lifting lug is connected with the lower end of the first composite cable.
Further, the first connecting piece and the second connecting piece are anchor chains and/or shackles and/or kenter buckles;
the central axis of the first composite cable coincides with the central axis of the jacket.
Further, the first connecting piece and the second connecting piece are three-hole plates;
the central axis of the first composite cable coincides with the central axis of the jacket.
Furthermore, the composite cable fixing units are multiple, the top ends of the first composite cables are sequentially connected through a fifth rope, and the bottom ends of the first composite cables are sequentially connected through a sixth rope.
The invention also provides a jacket tensioning type corrosion prevention system installation method, which comprises the following steps:
s1: connecting the upper end of a first composite cable integrated with an auxiliary anode and/or a first reference electrode with one ends of a first rope and a second rope of a first fixing device through a first connecting piece, wherein the other ends of the first rope and the second rope are fixedly connected with the outer wall of the main leg of the jacket;
s2: connecting the lower end of a first composite cable with a second fixing device, wherein the composite cable is tensioned through the first fixing device and the second fixing device;
s3, the ocean platform is installed in the designated sea area.
The upper end of the first composite cable is fixedly tensioned through the first rope, the second rope and the first connecting piece, the traditional tensioning device is replaced, the construction steps are reduced, the offshore construction period, the construction cost and the construction difficulty are reduced, and meanwhile the construction risk 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 needed to be 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 following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is an enlarged view of B in FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of the present invention;
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.
The invention provides a jacket tensioning type corrosion prevention system, which comprises: jacket 1 and composite cable fixing unit, the composite cable fixing unit comprising: the composite structure comprises a first composite cable 2, a first fixing device and a second fixing device, wherein an auxiliary anode 4.1 and/or a first reference electrode 4.2 are/is arranged on the first composite cable 2, one end of the first fixing device is connected with the upper end of the first composite cable 2, the other end of the first fixing device is connected with a main leg 1.1 of the jacket 1, the second fixing device is connected with the lower end of the first composite cable 2, and the first composite cable 2 is tensioned through the first fixing device and the second fixing device;
as shown in fig. 2, the first fixing device includes: a first rope 5, a second rope 6 and a first connecting piece 7; the upper end of the first composite cable 2 is connected with one end of the first rope 5 and one end of the second rope 6 through a first connecting piece 7, and the other end of the first rope 5 and the other end of the second rope 6 are fixedly connected with the outer wall of the main leg 1.1.
Specifically, the first composite cable 2 is provided with a jacket tension type corrosion prevention system, as shown in fig. 1, including: the jacket comprises a jacket 1, a first composite cable 2, a first fixing device and a second fixing device, wherein an auxiliary anode 4.1 and/or a first reference electrode 4.2 are/is arranged on the first composite cable 2, so that the jacket 1 is protected and corrosion condition monitoring is realized; one ends of a first rope 5 and a second rope 6 are connected with the upper end of the first composite cable 2 through a first connecting piece 7, and the other ends of the first rope 5 and the second rope 6 are fixedly connected with lifting lugs on two opposite main legs 1.1 of the jacket 1, so that the first composite cable 2 is transversely tensioned; the lower extreme and the second fixing device of first compound cable 2 are connected, first fixing device and second fixing device realize the tensioning to first compound cable 2, this application is applicable to the ice surface environment, to the sea area that has the ice sheet, only through first rope 5, second rope 6 and first connecting piece 7 just can realize the tensioning to first compound cable 2, prevent that first compound cable 2 from producing the wrench movement and damage under the extrusion of ice sheet, and simultaneously, when the stormy waves is great, jacket 1 can swing along with the waves, with the fixed first compound cable 2 of this kind of mode, can swing along with jacket 1 synchronization, prevent that first compound cable 2 from producing the collision with jacket 1, when effectual protection and detection, and the cost is saved, construction cycle has been reduced.
Further, still include: a second composite cable 3; the second composite cable 3 is arranged on the outer wall of the main leg 1.1, and a second reference electrode 4.3 is arranged on the second composite cable 3.
Specifically, the second composite cable 3 is fixed on the outer wall of the main leg 1.1 through the lifting lugs on the main leg 1.1, the second composite cable 3 is tensioned by the two lifting lugs on the main leg 1.1, and the second composite cable 3 is provided with the second reference electrode 4.3, so that the corrosion condition of the outer wall of the main leg 1.1 is monitored, and the practical life of the jacket 1 is prolonged; in the mode, before the jacket 1 enters water, the jacket 1 is installed in the sea after the second composite cable 3 integrated with the second reference electrode 4.3 is stretched and fixed on the main leg 1.1, and then the jacket 1 is installed in the sea without underwater construction; the two ends of the second composite cable 3 can also be fixed on the side wall of the main leg 1.1 through lifting lugs after the jacket 1 enters water.
Further, still include: and the third reference electrode 4.4, wherein the third reference electrode 4.4 is fixedly connected with the outer wall of the main leg 1.1.
In particular, the third reference electrode 4.4 is fixed directly to the outer wall of the main leg 1.1 by bolts or other known means, allowing monitoring of the corrosion of the outer wall of the main leg 1.1, in such a way that the third reference electrode 4.4 is fixed in the mean square, whether the jacket 1 is on land or underwater.
Further, as shown in fig. 3, the second fixing device includes: a third rope 8, a fourth rope 9 and a second connecting piece 10;
the lower end of the first composite cable 2 is respectively connected with one end of a third rope 8 and one end of a fourth rope 9 through a second connecting piece 10, and the other end of the third rope 8 and the other end of the fourth rope 9 are fixedly connected with the outer wall of the main leg 1.1. When the jacket 1 is located in shallow sea, the disturbance of sea waves is small, and the first composite cable 2 is fixed at the lower end through the third rope 8, the fourth rope 9 and the second connecting piece 10, so that the construction cost and the construction period are saved.
Further, the second fixing device includes: heavy stick and second connecting piece 10, heavy stick together through second connecting piece 10 with first compound cable 2 lower extreme is connected. When the jacket 1 is located in the deep sea, the sea wave disturbance is large, and the second fixing device needs to be a heavy lump made of steel or concrete materials so as to reduce the shaking generated by the first composite cable 2 when the sea wave surges.
Further, the second fixing device is a lifting lug, the lifting lug is fixed on the outer wall of the main leg, the lifting lug is connected with the lower end of the first composite cable 2, and as shown by a dotted line in fig. 1, another fixing mode of the first composite cable 2 is provided.
Further, the first connecting element 7 and the second connecting element 10 are anchor chains and/or shackles and/or kentuckers. The connecting piece of the above form is simple to obtain, low in cost and convenient to replace.
Further, the first connecting member 7 and the second connecting member 10 are three-hole plates, which have more connection stability than anchor chains, shackles and kenter buttons.
Further, the central axis of the first composite cable 2 coincides with the central axis of the jacket 1. The second composite cable provides the best protection for the jacket 1.
Further, as shown in fig. 4, the plurality of composite cable fixing units are provided, top ends of the plurality of first composite cables 2 are sequentially connected by a fifth rope 10, and bottom ends of the plurality of first composite cables 2 are sequentially connected by a sixth rope 11.
Specifically, in the embodiment, the number of the composite cable fixing units is two, the top ends of the two first composite cables 2 are connected to each other by the fifth rope 10, and the bottom ends of the two first composite cables 2 are connected to each other by the sixth rope 11; the two composite cable fixing units realize more accurate monitoring and more effective protection of the corrosion state of the jacket, wherein the fifth rope 10 and the sixth rope 11 realize the separation of the two first composite cables 2, and prevent the first composite cables from interfering with each other and influencing the monitoring and protection of the steel pipe frame.
The invention also provides a jacket tensioning type corrosion prevention system installation method, which comprises the following steps:
s1: welding a plurality of lifting lugs on the outer wall of a main leg, respectively connecting the upper end of a first composite cable integrated with an auxiliary anode and/or a first reference electrode with one end of a first rope and one end of a second rope of a first fixing device through any one or more of an anchor chain, a shackle and a kenter buckle, or only connecting the upper end of the first composite cable and the upper end of the second composite cable through a three-eyelet plate, and fixedly connecting the other ends of the first rope and the second rope with the lifting lugs or hoops above the outer wall of the main leg;
s2: connecting the lower end of the first composite cable with one end of a third rope and one end of a fourth rope of a second fixing device through any one or more of an anchor chain, a shackle and a kenter buckle, or only connecting the lower ends of the first rope and the second rope with a lifting lug or a hoop below the outer wall of the main leg; the first composite cable is tensioned by the first fixing device and the second fixing device;
when the second fixing device comprises the heavy lump and a second connecting piece, the heavy lump is placed to a seabed positioning position through a hoisting machine, then an underwater robot or a man-made submarine submergence is carried out on the bottom end of the composite cable and the heavy lump through the second connecting piece, namely any one or more of an anchor chain, a shackle and a kenter buckle, so as to be fixedly connected, and the first composite cable is tensioned through the first fixing device and the heavy lump;
s3: fixing two ends of a second composite cable provided with a second reference electrode on the outer side wall of the main leg, or fixing a third reference electrode on the outer wall of the main leg through bolts or other existing modes;
s4: and (4) putting the ocean platform into a fixed sea area through a hoisting machine.
Further, in this embodiment, when there are two first composite cables, the upper end of each first composite cable is fixedly connected to the lifting lug above the main leg through the first rope and the second rope, the lower end of each first composite cable is fixedly connected to the lifting lug below the main leg through the third rope and the fourth rope, the two first connecting pieces connected to the upper ends of the two first composite cables are connected through the fifth rope, and the two second connecting pieces connected to the lower ends of the two first composite cables are connected through the sixth rope, so that the fifth rope and the sixth rope are kept in a tensioned state, and a certain distance is kept between the two first composite cables, thereby preventing mutual interference and affecting monitoring and protection of the steel pipe frame.
The tensioning mode of the composite cable in the prior art is as follows: firstly, a position to be put in a gravity foundation is positioned by using a remote control unmanned submersible, the gravity foundation is put in a seabed positioning position by using a manual hoist or a hoisting machine, and then an underwater robot or a man-made submarine is submerged into the seabed to fix the bottom end of the composite cable and the gravity foundation so as to stretch the composite cable; the method adopts more large-scale equipment, is complicated in construction operation, and wastes time and equipment cost; the lifting lug, the first rope, the second rope, the third rope and the fourth rope which are welded on the main leg are adopted to tension the composite cable, and the lifting lug is simple in structure and convenient to install, and completes all the tensioning work of the composite cable before the ocean platform enters water, and the composite cable is installed on the land instead of offshore operation, so that the construction working condition is better than that of the composite cable; positioning and throwing of a gravity foundation are not needed by an underwater robot; to sum up, because the reduction of structure, equipment and construction steps makes construction steps reduce, when satisfying to carry out the stretch-draw to composite cable, makes construction steps reduce, has reduced marine construction cycle, construction cost and the construction degree of difficulty, reduces the construction risk simultaneously.
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 (10)
1. A jacket-tensioning corrosion protection system, comprising: jacket (1) and composite cable fixing unit, the composite cable fixing unit comprising: the device comprises a first composite cable (2), a first fixing device and a second fixing device, wherein an auxiliary anode (4.1) and/or a first reference electrode (4.2) are/is arranged on the first composite cable (2), one end of the first fixing device is connected with the upper end of the first composite cable (2), the other end of the first fixing device is connected with a main leg (1.1) of the jacket (1), the second fixing device is connected with the lower end of the first composite cable (2), and the first composite cable (2) is tensioned through the first fixing device and the second fixing device;
the first fixing device includes: a first rope (5), a second rope (6) and a first connecting piece (7); the upper end of the first composite cable (2) is connected with one ends of the first rope (5) and the second rope (6) through a first connecting piece (7), and the other ends of the first rope (5) and the second rope (6) are fixedly connected with the outer wall of the main leg (1.1).
2. The system of claim 1, further comprising: a second composite cable (3); the second composite cable (3) is arranged on the outer wall of the main leg (1.1), and a second reference electrode (4.3) is arranged on the second composite cable (3).
3. The system of claim 1, further comprising: and the third reference electrode (4.4), wherein the third reference electrode (4.4) is fixedly connected with the outer wall of the main leg (1.1).
4. The system of claim 1, wherein the second fixture comprises: a third rope (8), a fourth rope (9) and a second connecting piece (10);
the lower end of the first composite cable (2) is connected with one ends of the third rope (8) and the fourth rope (9) through a second connecting piece (10), and the other ends of the third rope (8) and the fourth rope (9) are fixedly connected with the outer wall of the main leg (1.1).
5. The system of claim 1, wherein the second fixture comprises: second connecting piece (10) and heavy stick together, heavy stick together through second connecting piece (10) with first compound cable (2) lower extreme is connected.
6. The system according to claim 1, characterized in that said second fixing means are lifting lugs fixed to the outer wall of said main leg (1.1), said lifting lugs being connected to the lower end of said first composite cable (2).
7. System according to claim 4 or 5, characterized in that said first and second connection elements (7, 10) are anchor chains and/or shackles and/or kentuckers;
the central axis of the first composite cable (2) coincides with the central axis of the jacket (1).
8. System according to claim 4 or 5, characterized in that said first connector (7) and said second connector (10) are three-eyelet plates;
the central axis of the first composite cable (2) coincides with the central axis of the jacket (1).
9. The system according to claim 7, wherein said composite cable fixing unit is plural, top ends of plural first composite cables (2) are sequentially connected by a fifth rope (10), and bottom ends of plural first composite cables (2) are sequentially connected by a sixth rope (11).
10. A jacket tensioning type anticorrosion system installation method is characterized by comprising the following steps:
s1: connecting the upper end of a first composite cable integrated with an auxiliary anode and/or a first reference electrode with one ends of a first rope and a second rope of a first fixing device through a first connecting piece, wherein the other ends of the first rope and the second rope are fixedly connected with the outer wall of the main leg of the jacket;
s2: connecting the lower end of a first composite cable with a second fixing device, wherein the composite cable is tensioned through the first fixing device and the second fixing device;
s3, the ocean platform is installed in the designated sea area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898383.4A CN111893491B (en) | 2020-08-31 | 2020-08-31 | Jacket tensioning type anti-corrosion system and installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898383.4A CN111893491B (en) | 2020-08-31 | 2020-08-31 | Jacket tensioning type anti-corrosion system and installation method |
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| CN111893491A true CN111893491A (en) | 2020-11-06 |
| CN111893491B CN111893491B (en) | 2023-10-13 |
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| CN112522712A (en) * | 2020-12-25 | 2021-03-19 | 中海油能源发展股份有限公司 | Jacket stretching type impressed current cable protection device |
| CN114784708A (en) * | 2022-04-18 | 2022-07-22 | 大连科迈尔防腐科技有限公司 | Composite cable installation method for newly-built jacket |
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| CN111893491B (en) | 2023-10-13 |
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