High-stability drill conductor lifting tool

Abstract

The high-stability drill conductor lifting tool comprises a connecting long rod, a lifting female head and a sleeve body, a connecting hole is formed in one end of the connecting long rod and used for being connected with a drill floor top drive mechanism, and a limiting table is arranged at the other end of the connecting long rod; the lifting female head is arranged on the peripheral side of the connecting long rod in a sliding and sleeving mode and fixedly embedded in the casing pipe body, the connecting long rod is detachably connected with a limiting ring, the limiting ring is used for driving the lifting female head to abut against the limiting table, and the drill conductor lifting tool has the beneficial effects that the drill conductor lifting tool is more convenient to install and more stable in connection.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore oil equipment, and particularly relates to a high-stability riser lifting tool. Background Technique

[0002] At present, the riser is a casing pipe that is lowered from an offshore drilling platform to the shallow sea floor. Its main functions are to isolate seawater, form a drilling fluid circulation channel, and at the same time serve as a supporting structure for the offshore wellhead. During the drilling and completion construction process, the strength and safety of the riser are crucial for the safety of offshore drilling operations.

[0003] In the related technology, the lifting method of the riser is to use an external clamp to clamp the outside of the riser, then connect the external clamp to a wire rope, and lift it through a drill pipe or a top drive.

[0004] In view of the above related technology, during the installation process, a large amount of effort is required to insert the casing into the inner side of the external clamp and tighten it, which is not convenient for installation. And during the lifting process of the casing, the outer diameter of the casing is likely to be deformed due to reasons such as torsion and folding, and the external clamp is likely to loosen and fall off during the lifting process. Therefore, there are problems that the installation of the riser lifting tool is not convenient and the connection is not firm enough.

[0005] In view of this, it is indeed necessary to provide a technical solution of a high-stability riser lifting tool to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a high-stability riser lifting tool to solve the problems of inconvenient installation and insufficient firm connection of the riser lifting tool.

[0007] In order to achieve the above purpose, a high-stability riser lifting tool of the utility model adopts the following technical solutions:

[0008] A high-stability riser lifting tool includes a connecting long rod, a lifting female head and a casing body. One end of the connecting long rod is provided with a connecting hole for connecting a drill floor top drive mechanism, and the other end of the connecting long rod is provided with a limiting platform; the lifting female head is slidably sleeved on the periphery of the connecting long rod, the lifting female head is fixedly embedded in the casing body, and a limiting ring is detachably connected to the connecting long rod, and the limiting ring is used to drive the lifting female head to abut against the limiting platform.

[0009] As an optimization of a high-stability riser lifting tool, a connecting part is provided on the outer wall of one end of the connecting long rod close to the limiting platform, the limiting ring is a nut, and the nut is threadedly connected to the connecting part.

[0010] As an optimization of a high-stability water isolation casing lifting tool, a sliding portion is provided on the outer wall of one end of the connecting long rod close to the limiting platform. A plurality of annular grooves are provided on the limiting ring along the circumferential direction. The sliding portion is slidably connected to one of the annular grooves. A channel groove is provided on the side wall of the limiting ring along the axial direction, and the channel groove vertically communicates with a plurality of the annular grooves.

[0011] As an optimization of a high-stability water isolation casing lifting tool, a welding ring is extended outward at one end of the lifting female head close to the connecting hole, and the welding ring is fixedly connected to the end face of the casing body.

[0012] As an optimization of a high-stability water isolation casing lifting tool, the outer wall of the lifting female head is sealingly connected to the inner wall of the casing body.

[0013] As an optimization of a high-stability water isolation casing lifting tool, a positioning groove is provided on the end face of one end of the lifting female head away from the connecting hole, and the limiting platform abuts against the bottom of the positioning groove.

[0014] As an optimization of a high-stability water isolation casing lifting tool, an anti-corrosion coating is applied to the outer wall of the connecting long rod and the inner wall of the lifting female head.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: When it is necessary to lift the water isolation casing, by sleeving the lifting female head on the connecting long rod and sliding it, the lifting female head itself is sealingly and fixedly connected to the casing body. Then, the lifting female head is driven by the limiting ring to abut against the limiting platform, and the limiting ring is locked to fix the position of the lifting female head. Finally, the connecting hole is combined with the drill pipe or the top drive to realize the overall installation of the lifting tool. This lifting tool not only has a simple installation method and improves the disassembly efficiency, but also ensures that the object to be lifted remains stable during the ascending and descending processes, greatly reducing the risk of damage caused by shaking, and improving the safety and reliability of the lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of a high-stability water isolation casing lifting tool according to an embodiment of the present application;

[0018] Figure 2 It is a sectional view of a high-stability water isolation casing lifting tool according to Embodiment 1 of the present application;

[0019] Figure 3 This is a schematic cross-sectional view of a high-stability water isolation casing lifting tool according to Embodiment 2 of the present application;

[0020] Figure 4 This is a schematic axial cross-sectional view of the limit ring according to Embodiment 2 of the present application.

[0021] In the figure: 1. Connecting long rod; 11. Connecting hole; 12. Limiting platform; 13. Connecting part; 14. Sliding part; 2. Lifting female head; 21. Welding ring; 22. Positioning groove; 3. Casing body; 4. Limit ring; 41. Nut; 42. Ring groove; 43. Channel groove. Specific embodiments

[0022] To make the technical solutions and advantages of the present utility model clearer, the present utility model and its beneficial effects will be further described in detail below in conjunction with specific embodiments and the accompanying drawings of the specification. However, the embodiments of the present utility model are not limited thereto.

[0023] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0025] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 , to further illustrate the present application in detail.

[0026] The present application provides a high-stability water isolation casing lifting tool, adopting the following technical solutions:

[0027] Embodiment 1

[0028] Refer to Figure 1 and Figure 2, the high-stability riser lifting tool includes a connecting long rod 1, a lifting female head 2, and a casing body 3. The connecting long rod 1 is a stainless steel round tube. One end of the connecting long rod 1 is provided with a connecting hole 11, and the inner wall of the connecting hole 11 is provided with a drill pipe thread, which can be threadedly connected to the drill floor or the top drive. The drill pipe threads include threads of models such as DSHT55, GPDS50, GPTS55, XT57, XT39, etc. In this embodiment, the inner wall of the connecting hole 11 is provided with a DSHT55 model thread; the other end of the connecting long rod 1 is integrally formed with a limiting platform 12, and the outer diameter of the limiting platform 12 is larger than the outer diameter of the connecting long rod 1. The lifting female head 2 is in a cylindrical tubular shape, and the lifting female head 2 is sleeved on the periphery of the connecting long rod 1, and the lifting female head 2 slides up and down along the length direction of the connecting long rod 1. The casing body 3 can be a casing of a buckle type such as SR30C, LZ-2, LC-2, etc. The lifting female head 2 is embedded and installed at one end of the casing body 3 and is sealed and fixed at the same time. A limiting ring 4 is detachably connected to the periphery of the connecting long rod 1. The limiting ring 4 is located on the side of the lifting female head 2 close to the connecting hole 11. By sliding the limiting ring 4 relative to the connecting long rod 1, the limiting ring 4 can drive the lifting female head 2 to abut against the limiting platform 12. By locking and fixing the limiting ring 4, the lifting female head 2 is limited between the limiting ring 4 and the limiting platform 12, thereby realizing the stable connection of the riser. In this lifting tool, the connecting long rod 1 is made of hard metal, which is not easily twisted, folded or deformed, can reduce the detachment of the connecting part 13, can bear a greater load and frequent use, reduces the replacement frequency of the equipment, and thus improves the connection stability; in addition, during the installation process with the riser, one end is threadedly connected to the top drive or the drill pipe, and the other end embeds and fixes the lifting female head 2 on the casing, and then through the detachability of the limiting ring 4, the installation and disassembly of the whole lifting tool and the casing body 3 can be realized, thereby improving the convenience of loading and unloading.

[0029] In a preferred embodiment of the present application, referring to Figure 1 and Figure 2 , a connecting part 13 is integrally formed on the outer wall of one end of the connecting long rod 1 close to the limiting platform 12. The connecting part 13 is an external thread, and the limiting ring 4 is a nut 41. The nut 41 is threadedly connected to the connecting part 13. Rotating the nut 41 drives the lifting female head 2 close to the limiting platform 12. When the lifting female head 2 abuts against the limiting platform 12, stop rotating the nut 41, and the nut 41 self-locks to limit the lifting female head 2 between the limiting ring 4 and the limiting platform 12, thereby realizing the stable connection of the lifting tool and the riser.

[0030] In a preferred embodiment of the present application, referring to Figure 1 and Figure 2, one end face of the female lifting head 2 close to the connection hole 11 is integrally formed with a welding ring 21. The outer diameter of the welding ring 21 is larger than that of the female lifting head 2. One end face of the welding ring 21 far from the connection hole 11 abuts against the end face of the sleeve body 3 and is fixed by welding, realizing the sealed and stable connection between the female lifting head 2 and the sleeve body 3.

[0031] Further, referring to Figure 1 and Figure 2 , the female lifting head 2 is embedded and installed in the sleeve body 3, and the outer wall of the female lifting head 2 is welded and fixed to the inner wall of the sleeve body 3, further improving the stability and sealing performance of the connection between the female lifting head 2 and the sleeve.

[0032] In the preferred embodiment of the present application, referring to Figure 1 and Figure 2 , a positioning groove 22 is recessed on one end face of the female lifting head 2 far from the connection hole 11. The limiting platform 12 abuts against the bottom of the positioning groove 22. When the water-stop casing shakes during lifting, the side wall of the positioning groove 22 abuts against the edge of the limiting platform 12, keeping the connecting long rod 1 and the female lifting head 2 in a vertical position, reducing shaking and collision noise, further improving the stability of the lifting tool, and at the same time reducing the interference and influence on the surrounding environment.

[0033] In the preferred embodiment of the present application, the outer wall of the connecting long rod 1 and the inner wall of the female lifting head 2 are both coated with an anti-corrosion coating. The anti-corrosion coating uses an anti-corrosion paint that can adapt to the marine environment. In this embodiment, the anti-corrosion coating uses ZS-711 marine anti-corrosion paint, which can reduce the rust of the parts such as the connecting long rod 1 and the female lifting head 2 in contact with seawater, extend the service life, and is beneficial to reducing the use and maintenance costs.

[0034] Embodiment 2

[0035] Different from Embodiment 1, referring to Figure 3 and Figure 4 , one end outer wall of the connecting long rod 1 close to the limiting platform 12 is integrally formed with a sliding part 14. The sliding part 14 is in the shape of a square. A plurality of annular grooves 42 are axially distributed on the inner wall of the limiting ring 4. The width of the annular groove 42 matches the width of the sliding part 14. The sliding part 14 is slidably connected in one of the annular grooves 42. Each annular groove 42 corresponds to a different width of the female lifting head 2. A channel groove 43 is axially penetrated on the inner wall of the limiting ring 4. The channel groove 43 vertically communicates with each annular groove 42. The sliding part 14 slides in the channel groove 43 and can slide and transfer to any one of the annular grooves 42. While ensuring the stable connection, it not only reduces the resistance during the installation and disassembly of the detachable connection process, is beneficial to improving the disassembly efficiency, but also can flexibly adjust the distance between the limiting ring 4 and the limiting platform 12, increasing the versatility of the lifting tool, so as to adapt to different casing connection requirements.

[0036] Experimental principle of the embodiment of the present application: When it is necessary to lift the casing pipe, the lifting female head 2 is sleeved on the connecting long rod 1 and slides from the end of the connecting long rod 1 far away from the limiting platform 12. The limiting ring 4 is detachably sleeved on the connecting long rod 1. The limiting ring 4 drives the lifting female head 2 to abut against the limiting platform 12. The limiting ring 4 is locked and installed on the outer wall of the connecting long rod, and the lifting female head 2 is fixed and limited on the connecting long rod 1. Then the lifting female head 2 is embedded into the casing body 3, and is hermetically fixed by welding the welding ring 21 and the outer wall of the lifting female head 2 to the casing body 3 respectively, so as to realize the stable connection between the lifting tool and the casing pipe. Then the connecting hole 11 of the connecting long rod 1 is fixedly connected with the drill pipe or the top drive, thus completing the overall installation of the lifting tool. The installation method is not only simple and convenient, improving the loading and unloading efficiency, but also firmly connected during use, not easily interfered by external factors, and improving the stability of the casing pipe.

[0037] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments, and any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present invention all fall within the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A high-stability waterproof casing lifting tool, characterized in that: The invention comprises a connecting rod (1), a lifting female head (2) and a casing body (3); one end of the connecting rod (1) is provided with a connecting hole (11), and the connecting hole (11) is used to connect the top drive mechanism of the drilling platform; the other end of the connecting rod (1) is provided with a limiting platform (12); the lifting female head (2) is slidably sleeved on the peripheral side of the connecting rod (1), and the lifting female head (2) is fixedly embedded in the casing body (3); the connecting rod (1) is detachably connected to a limiting ring (4), and the limiting ring (4) is used to drive the lifting female head (2) to press against the limiting platform (12).

2. A high stability waterproof casing lifting tool according to claim 1, characterized in that: A connecting portion (13) is provided on the outer wall of one end of the connecting long rod (1) close to the limiting platform (12); the limiting ring (4) is a nut (41) which is threadedly connected to the connecting portion (13).

3. A high stability casing lifting tool according to claim 1, characterized in that: A sliding portion (14) is provided on the outer wall of one end of the connecting long rod (1) close to the limiting platform (12); the limiting ring (4) is provided with a plurality of annular grooves (42) along the circumferential direction; the sliding portion (14) is slidably connected in one of the annular grooves (42); a channel groove (43) is provided on the side wall of the limiting ring (4) along the axial direction; the channel groove (43) is vertically connected to the plurality of annular grooves (42).

4. A high stability casing lifting tool according to claim 1, characterized in that: A welding ring (21) is provided on one end of the lifting female head (2) close to the connecting hole (11) and extends outwards, and the welding ring (21) is fixedly connected to the end surface of the sleeve body (3).

5. A high stability casing lifting tool according to claim 1, characterized in that: The outer wall of the lifting female head (2) is sealingly connected to the inner wall of the sleeve body (3).

6. A high stability casing lifting tool according to claim 1, characterized in that: A positioning groove (22) is provided on an end surface of the lifting female head (2) away from the connecting hole (11), and the limiting platform (12) abuts against the bottom of the positioning groove (22).

7. A high stability casing lifting tool according to claim 1, characterized in that: The outer wall of the connecting rod (1) and the inner wall of the lifting female head (2) are both coated with an anti-corrosion coating.

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