Offshore oil platform pipe fitting repairing and reinforcing welding structure

Abstract

The utility model belongs to the technical field of welding tools, and particularly relates to an offshore oil platform pipe fitting repairing and reinforcing welding structure which comprises a first semi-ring hoop, a second semi-ring hoop, a first pin shaft, a second pin shaft, a hinge bolt, a radial adjusting bolt and a ring lug nut. The other end of the first semi-ring hoop and the other end of the second semi-ring hoop are connected through a second pin shaft and a hinge bolt to form a ring hoop structure positioning clamp, the hinge bolt is connected with a ring lug nut, the first semi-ring hoop and the second semi-ring hoop are provided with a plurality of threaded holes, radial adjusting bolts are arranged in the threaded holes, and each radial adjusting bolt is perpendicular to the first semi-ring hoop or the second semi-ring hoop. During use, the inner end of each radial adjusting bolt abuts against the outer wall of the pipe fitting, and a patch is arranged between the inner end of any one or more than two radial adjusting bolts and the outer wall of the pipe fitting. The device has the advantages that the leakage point welding repair of various pipe fittings is realized, the operation is convenient, and the repair requirements of different leakage point sizes are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding tooling, in particular to a pipe repair and reinforcement welding structure for an offshore oil platform. Background Art

[0002] Offshore oil platforms are complex and intricate, encompassing a sturdy main structure, a massive anchor chain system, deep-sea pile foundations, critical risers supporting production, and a complex underwater production system. Each component is meticulously designed and constructed to ensure stable operation in the harsh marine environment and withstand the ravages of high winds and high waves. The steel pipes in the platform columns are susceptible to damage from seawater corrosion and collisions with passing ships, requiring prompt repair to prevent weakening the platform's core strength and posing safety risks.

[0003] Chinese invention patent application number 201610088259.5 discloses a dry-type gas injection repair chamber for underwater risers on offshore oil platforms. The chamber utilizes two opposing half-tile-shaped sidewalls, each symmetrically fixed with semicircular riser holes at the top. The chamber also features gas injection holes. The bottoms of the two half-tile sidewalls are open, and high-pressure sealing strips are installed at the riser holes and at the joints between the sidewalls. This chamber can enclose the riser to be repaired, creating a dry repair space and enabling underwater repair of the riser.

[0004] Chinese invention patent application number 202210237746.9 discloses a corrosion welding repair device and method for oil or natural gas transmission steel pipelines. The device comprises an anchor rod, a steel wire rope, and a clamp. The clamp comprises a pressure plate, an elastic telescopic rod, and two sets of clamping mechanisms. The pressure plate is used to press the patch plate against the outside of the repaired area of ​​the steel pipeline. The elastic telescopic rod is vertically fixed to the middle of the outer surface of the pressure plate. The end of the elastic telescopic rod, away from the pressure plate, is provided with a through hole through which the steel wire rope slides. The two sets of clamping mechanisms are located on either side of the elastic telescopic rod and are used to clamp the patch plate at both ends in the circumferential direction. The patch plate is fixed to the steel pipeline by the anchor rod, steel wire rope, and clamp. The steel wire rope is fixed to the ground by the anchor rod, eliminating the need to find an anchor point on the steel pipeline. Fixing the steel wire rope on the ground is relatively easy to operate.

[0005] It can be seen that due to the particularity of the leak location of offshore oil platform pipe fittings, when repairs are needed, how to make the patch and the pipe body fit better and more conveniently is an important part of improving the welding effect, and there is room for further optimization. Utility Model Content

[0006] The purpose of the utility model is to provide an offshore oil platform pipe fitting repair reinforcement welding structure, overcome the deficiencies of the existing technology, realize the welding repair of leaking points of offshore oil platform pipe fittings, easy to operate, conducive to timely handling of problems found, reduce the workload of on-site patch fixing, improve the efficiency and reliability of repair processing, ensure the stability of the main strength of the offshore oil platform, and meet the technical requirements of customers for offshore oil platform pipe fitting repair.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A marine oil platform pipe repair and reinforcement welding structure is characterized in that it includes a half hoop 1, a half hoop 2, a pin 1, a pin 2, a hinge bolt, a radial adjustment bolt and a ring ear nut, one end of the half hoop 1 and the half hoop 2 are connected by the pin 1, and the other end of the half hoop 1 and the half hoop 2 are connected by the pin 2 and the hinge bolt to form a hoop structure positioning fixture, and the difference between the inner diameter of the hoop and the diameter of the pipe is not less than 100 mm; the ring ear nut is connected to the hinge bolt, and the half hoop 1 and the half hoop 2 are provided with a plurality of threaded holes, and radial adjustment bolts are provided in the threaded holes, and the center lines of the radial adjustment bolts on the half hoop 1 or the half hoop 2 both point to the center of the circle of the half hoop 1 and the half hoop 2; when in use, the inner end of each radial adjustment bolt is against the outer wall of the pipe, and a patch is provided between the inner end of any one or more of the radial adjustment bolts and the outer wall of the pipe.

[0009] Furthermore, the tail ends of the first and second pins are both provided with cotter pins.

[0010] Furthermore, at the threaded hole openings on the semi-hoop one and the semi-hoop two, thickened steps are provided on the outer side and / or inner side of the corresponding hoop body, and the thickened steps are multiple independent frustums or multiple frustums connected into one.

[0011] Furthermore, the thickness of the half hoop 1 and the half hoop 2 is 8-10 mm.

[0012] Furthermore, the specification of the radial adjustment bolt is M12-16.

[0013] Furthermore, the thickness of the thickened step is 3-6 mm.

[0014] Furthermore, the inner diameter of the hoop structure composed of the half hoop 1 and the half hoop 2 is 200 mm as a level to form a series of sizes.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) It can realize the welding repair of leaks of various pipe fittings on offshore oil platforms. It is easy to operate, which is conducive to timely handling of problems found and reduces the workload of on-site patch fixing. Multiple positioning fixtures can be used in combination to meet the repair needs of leaks of different sizes.

[0017] 2) It can improve the efficiency and reliability of repair processing, ensure the stability of the main strength of the offshore oil platform, meet customers' technical requirements for offshore oil platform pipe repair, improve maintenance efficiency, reduce the labor intensity of staff, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the first embodiment of the positioning fixture of the present utility model;

[0019] Figure 2 This is a schematic diagram of the first embodiment of the present invention in use;

[0020] Figure 3 This is a schematic diagram of the second usage state of embodiment 1 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the third usage state of Example 1 of the utility model;

[0022] Figure 5 This is a schematic structural diagram of Example 2 of the present utility model;

[0023] In the figure: 1-half hoop 1, 2-half hoop 2, 3-pin 1, 4-pin 2, 5-hinge bolt, 6-radial adjustment bolt, 7-ring ear nut, 8-pipe fitting, 9-patch, 10-split pin, 11-thickening step. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0026] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but rather represents only selected embodiments of the present invention.

[0027] See Figure 1-2 , is a structural schematic diagram of Example 1 of a repair and reinforcement welding structure of a marine oil platform pipe fitting 8 of the utility model, comprising a half hoop 1, a half hoop 2, a pin 1, a pin 2, a hinge bolt 5, a radial adjustment bolt 6 and a ring ear nut 7. One end of the half hoop 1 and the half hoop 2 are connected by the pin 1 3, and the other end of the half hoop 1 and the half hoop 2 are connected by the pin 2 4 and the hinge bolt 5 to form a hoop structure positioning fixture. In the embodiment, the diameter of the pipe fitting is 273-377 mm, the inner diameter of the applicable hoop is 480 mm, and the corresponding radial adjustment bolt 6 is installed with a specification of M12. A ring ear nut 7 is connected to the hinge bolt 5, and a plurality of threaded holes are provided on the half hoop 1 and the half hoop 2 2, and radial adjustment bolts 6 are provided in the threaded holes. The center lines of the radial adjustment bolts 6 on the half hoop 1 or the half hoop 2 2 point to the center of the circle of the half hoop 1 and the half hoop 2 2; when in use, the inner end of each radial adjustment bolt 6 is against the outer wall of the pipe fitting 8, and a patch 9 is provided between the inner end of any one or more radial adjustment bolts 6 and the outer wall of the pipe fitting 8. In Example 1, the size of the patch 9 is small, and only one radial adjustment bolt 6 is needed to tighten and position it. Subsequently, the periphery of the patch is welded, and the leaking point on the pipe fitting can be blocked with the patch.

[0028] In the embodiment, in order to prevent the pin shaft 1 3 and the pin shaft 2 4 from falling off, the tail ends of the pin shaft 1 3 and the pin shaft 2 4 are both provided with a cotter pin 10. In order to achieve sufficient strength, the thickness of the half hoop 1 and the half hoop 2 is 10 mm.

[0029] In order to adapt to pipes of different diameters, the hoop structure composed of half hoop 1 and half hoop 2 has an inner diameter of 200mm as a level to form a series of sizes. Before use, select the appropriate specification first. For example, if the pipe diameter is 426-529mm, the applicable hoop inner diameter is 680mm, and the corresponding radial adjusting bolt 6 is M16. According to the pipe diameter, the circle diameter of the inner end of the radial adjusting bolt 6 is consistent with the outer diameter of the pipe, and then open the ring ear nut 7 to open the hoop and clamp it to the outer wall of the pipe. Then adjust the radial adjusting bolt 6 at the leak point, leaving room for the patch 9, cover the patch 9 at the leak point, and then tighten it with the radial adjusting bolt 6 to start the welding operation.

[0030] See Figure 3, is a schematic diagram of the second usage state of Example 1 of the utility model, a marine oil platform pipe repair and reinforcement welding structure. The size of the patch 9 is larger than that of Example 1, and can be compressed and positioned by the ends of two radial adjustment bolts 6 on a positioning fixture.

[0031] See Figure 4 , is a schematic diagram of the third usage state of Example 1 of the utility model, a marine oil platform pipe repair and reinforcement welding structure. The size of the patch 9 is larger than that in Example 2, and can be used in combination with two positioning fixtures. The ends of the two radial adjustment bolts 6 on each positioning fixture are compressed and positioned.

[0032] See Figure 5 , is a schematic diagram of the structure of Example 2 of the present invention. To enhance the connection strength of the radial adjustment bolt 6, thickened steps 11 can be provided at the threaded hole openings (outer and inner sides) of the semi-hoop 1 and semi-hoop 2. Thickened steps 11 are formed by connecting multiple frustums into one. Thickened steps 11 are 3mm thick on each side, allowing the bolt engagement length to reach 16mm, which helps improve the clamping strength of the positioning fixture.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine oil platform pipe repair and reinforcement welding structure, characterized in that: It includes a half hoop 1, a half hoop 2, a pin 1, a pin 2, a hinge bolt, a radial adjustment bolt and a ring ear nut. One end of the half hoop 1 and the half hoop 2 are connected by the pin 1, and the other end of the half hoop 1 and the half hoop 2 are connected by the pin 2 and the hinge bolt to form a hoop structure positioning fixture. The difference between the inner diameter of the hoop and the diameter of the pipe is not less than 100mm; the ring ear nut is connected to the hinge bolt, and a plurality of threaded holes are provided on the half hoop 1 and the half hoop 2, and radial adjustment bolts are provided in the threaded holes. The center lines of the radial adjustment bolts on the half hoop 1 or the half hoop 2 point to the center of the circle of the half hoop 1 and the half hoop 2; when in use, the inner end of each radial adjustment bolt is against the outer wall of the pipe, and a patch is provided between the inner end of any one or more radial adjustment bolts and the outer wall of the pipe.

2. The offshore oil platform pipe repair and reinforcement welding structure according to claim 1 is characterized in that: The tail ends of the first and second pin shafts are both provided with cotter pins.

3. The offshore oil platform pipe repair and reinforcement welding structure according to claim 1 is characterized in that: The threaded hole openings on the semi-hoop 1 and the semi-hoop 2 are provided with thickened steps corresponding to the outer side and / or inner side of the hoop body. The thickened steps are multiple independent frustums or multiple frustums connected into one.

4. The offshore oil platform pipe repair and reinforcement welding structure according to claim 1 is characterized in that: The thickness of the first half hoop and the second half hoop is 8-10 mm.

5. The offshore oil platform pipe repair and reinforcement welding structure according to claim 1 is characterized in that: The specification of the radial adjustment bolt is M12-16.

6. The offshore oil platform pipe repair and reinforcement welding structure according to claim 3 is characterized in that: The thickness of the thickened step is 3-6 mm.

7. The offshore oil platform pipe repair and reinforcement welding structure according to claim 1 is characterized in that: The inner diameter of the hoop structure composed of the first half hoop and the second half hoop is 200 mm as a level to form a series of sizes.

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