Lifting and transferring tool for underwater oil pipe hanger and hole protection device

Abstract

The invention discloses a lifting and transferring tool for an underwater oil pipe hanger and a hole protection device, and relates to the technical field of underwater Christmas trees, the lifting and transferring tool comprises an outer body, and a plurality of lifting pins are arranged on the side wall of the outer body in the circumferential direction; the inner body is slidably arranged in the outer body and used for enabling the outer end of the lifting pin to extend out of the side wall of the outer body; the bottom of the hanging ring penetrates through the top of the outer body and then is connected with the inner body. A locking piece is arranged at the top of the outer body and used for controlling the height of the inner body in the outer body. According to the lifting and transferring tool for the underwater oil pipe hanger and the hole protection device, when the oil pipe hanger and the hole protection device are lifted and transferred, the locking or unlocking function is achieved through the lifting pin, locking between the outer body and the inner body is achieved through the operation screw, unlocking in the lifting and transferring process is prevented, and the lifting and transferring efficiency is improved. Therefore, the double-locking function is achieved, and the reliability in the lifting and transferring process is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of underwater oil production trees, and in particular to a lifting and transporting tool for an underwater oil pipe hanger and a hole protection device. Background Art

[0002] The lifting and transporting tools for tubing hangers and hole protectors are important tools for operating underwater wellhead production equipment. They can be conveniently lifted and transported during the lifting and transporting process of tubing hangers and hole protectors.

[0003] The patent with publication number CN118442016A discloses a convenient mechanical underwater tubing hanger recovery tool, including a tool body, a connecting block, an activation block, and an unlocking claw. The lower end of the connecting block is connected and fixed to the tool body, and the inner circumference of the connecting block has a transmission thread and is connected to the activation block. At least two bearing blocks that can be moved along the radial direction and at least two locking members that can be moved along the radial direction are evenly arranged on the circumference of the lower part of the tool body. The lower side of the outer circumference of the activation block has two inverted cone surfaces that respectively match the bearing block and the locking member to control the movement of the locking member and the bearing block. The unlocking claw is located on the periphery of the connecting block and the unlocking claw and the connecting block can move up and down relative to each other. The recovery tool in the present invention has a compact structure, simple installation and maintenance, and adopts a mechanical tool, which is safe and reliable. Compared with traditional tools, the recovery of the hanger can be completed without threaded buckling operation.

[0004] The above-mentioned tubing hanger recovery tool has a complex structure and a large deadweight, and is not suitable for the transportation process of the tubing hanger and the hole protection device on the ground.

[0005] Therefore, there is an urgent need for a simple-structured underwater tubing hanger and a hole protection device lifting and transporting tool. Summary of the invention

[0006] The purpose of the present invention is to provide a lifting and transporting tool for an underwater oil pipe hanger and a hole protection device with a simple structure.

[0007] To achieve the above object, the present invention provides the following solutions: The present invention provides a lifting and transporting tool for an underwater oil pipe hanger and a hole protection device, comprising an external body, an internal body, a lifting ring, a lifting pin and a locking piece; a plurality of through holes are circumferentially arranged on the side wall of the external body, a lifting pin is arranged in each through hole, and the length of the lifting pin is greater than the thickness of the side wall of the external body; the internal body is slidably arranged in the external body, and the internal body is used to make the outer end of the lifting pin extend out of the side wall of the external body; the bottom of the lifting ring passes through the top of the external body and is connected to the internal body; the locking piece is arranged on the top of the external body, and the locking piece is used to control the height of the internal body in the external body.

[0008] Optionally, the external body is a cylindrical structure, a receiving cavity is provided in the external body, the bottom of the receiving cavity is open, and the internal body is disposed in the receiving cavity.

[0009] Optionally, the inner body is a circular ring structure, a guide surface is provided in the middle and lower part of the outer wall of the inner body, the middle and upper part of the outer wall of the inner body is a vertical surface, the guide surface is used to push the lifting pin out, and the vertical surface is used to keep the lifting pin in a pushed-out state.

[0010] Optionally, an inner pressure cover is provided on the top of the inner body, the lower part of the lifting ring is connected to the center of the inner pressure cover, and the bottom of the locking member maintains the inner body at a predetermined height by abutting against the upper surface of the inner pressure cover.

[0011] Optionally, the bottom of the lifting ring is connected to the inner pressure cover via an external hexagonal screw, and the external hexagonal screw passes through the inner pressure cover and is threadedly connected to the bottom of the lifting ring.

[0012] Optionally, a bearing is provided between the end of the external hexagonal screw and the lower bottom surface of the inner pressure cover.

[0013] Optionally, the inner pressure cover is connected to the inner body via a hexagon socket screw.

[0014] Optionally, a spring is provided between the lifting pin and the outer body, and the spring is used to retract the lifting pin into the outer body.

[0015] Optionally, the locking member is an operating screw, and a plurality of the operating screws are arranged around the lifting ring on the top of the external body, the operating screws are threadedly connected to the external body, and the bottom of the operating screw passes through the external body and contacts the internal body.

[0016] Optionally, a spring pin is provided at the lower end of the operating screw.

[0017] Compared with the prior art, the present invention has achieved the following technical effects: The lifting and transporting tool for the underwater tubing hanger and the hole protection device of the present invention realizes the function of locking or unlocking the lifting and transporting tool, the tubing hanger and the hole protection device by squeezing or releasing the lifting pin through the internal body when lifting and transporting the tubing hanger and the hole protection device, and realizes the locking between the external body and the internal body through the operating screw to prevent the lifting pin from retracting due to the internal body rising during the lifting and transport process, thereby realizing the unlocking of the lifting and transporting tool, the tubing hanger and the hole protection device, thereby realizing the double locking function and enhancing the reliability of the lifting and transport process. The lifting and transporting tool for the underwater tubing hanger and the hole protection device of the present invention has a simple structure and a smaller dead weight. The locking or unlocking conversion can be completed by only turning the operating screw, and the operation is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the lifting and transporting tool of the underwater tubing hanger and the hole protection device in the present invention; Figure 2 It is a structural schematic diagram of the locking state of the lifting hole protection device of the lifting and transporting tool in the present invention; Figure 3 It is a schematic diagram of the locking state structure when the lifting and transporting tool in the present invention lifts the underwater tubing hanger; Figure 4 It is a schematic cross-sectional structure diagram of the locking state of the lifting and transporting tool in the present invention.

[0020] Description of reference numerals: 1. External body; 2. Internal body; 3. Lifting ring; 4. Internal pressure cover; 5. Spring pin; 6. Spring; 7. One-way thrust ball bearing; 8. Lifting pin; 9. Operating screw; 10. Hexagon socket screw; 11. Hexagon socket screw. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a lifting and transporting tool for an underwater oil pipe hanger and a hole protection device, which can realize the locking function of the lifting and transporting tool, the oil pipe hanger and the hole protection device by pressing down the lifting ring to move the internal body downward, thereby squeezing the lifting pin, and realizing the locking function of the lifting and transporting tool, the oil pipe hanger and the hole protection device, and realizing the locking between the external body and the internal body by operating the screw to prevent the internal body from rising up during the lifting and transport process and causing the lifting pin to retract, resulting in the unlocking of the lifting and transporting tool, the oil pipe hanger and the hole protection device, thereby realizing the double locking function and enhancing the reliability of the lifting and transport process.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 4 As shown, the present embodiment provides a lifting and transporting tool for an underwater oil pipe hanger and a hole protection device, comprising an external body 1, an internal body 2, a lifting ring 3, a lifting pin 8 and a locking piece; a plurality of through holes are circumferentially arranged on the side wall of the external body 1, and a lifting pin 8 is arranged in each through hole, and the length of the lifting pin 8 is greater than the thickness of the side wall of the external body 1; the internal body 2 is slidably arranged in the external body 1, and the internal body 2 is used to make the outer end of the lifting pin 8 extend out of the side wall of the external body 1; the bottom of the lifting ring 3 passes through the top of the external body 1 and is connected to the internal body 2; a locking piece is arranged on the top of the external body 1, and the locking piece is used to control the height of the internal body 2 in the external body 1.

[0025] When it is necessary to lift the underwater tubing hanger or the hole protector, the lifting and transporting tool is placed on the top of the underwater tubing hanger or the hole protector through the lifting device connecting the lifting ring 3, and the internal body 2 is moved downward by pressing down the lifting ring 3, thereby pushing the outer end of the lifting pin 8 to extend outward into the lifting slot of the underwater tubing hanger or the hole protector, and then the external body 1 and the internal body 2 are locked by the locking piece so that the lifting pin 8 will not retract, and then the lifting and transport are carried out by lifting with the lifting device.

[0026] In this specific embodiment, the outer body 1 is a cylindrical structure. A receiving cavity is disposed in the outer body 1 . The bottom of the receiving cavity is open, and the inner body 2 is disposed in the receiving cavity.

[0027] The inner body 2 is a circular ring structure, and a guide surface is provided at the middle and lower part of the outer wall of the inner body 2, and the middle and upper part of the outer wall of the inner body 2 is a vertical surface, and the guide surface is used to push out the lifting pin 8, and the vertical surface is used to keep the lifting pin 8 in the pushed-out state. The guide surface can be a conical surface, or a circumferential surface with a smaller bottom diameter, and the upper part is a transition conical surface between the circumferential surface and the vertical surface, and the minimum diameter of the guide surface is smaller than the diameter of the circle surrounded by the inner ends of all the lifting pins 8, so as to ensure that the guide surface can be inserted between all the lifting pins 8.

[0028] An inner gland 4 is provided on the top of the inner body 2, the lower part of the lifting ring 3 is connected to the center of the inner gland 4, and the bottom of the locking member keeps the inner body 2 at a predetermined height by abutting against the upper surface of the inner gland 4. The bottom of the lifting ring 3 is connected to the inner gland 4 by an external hexagon screw 11, and the external hexagon screw 11 penetrates the inner gland 4 and is threadedly connected to the bottom of the lifting ring 3.

[0029] A bearing is provided between the end of the external hexagonal screw 11 and the lower bottom surface of the inner pressure cover 4. In this specific embodiment, the bearing adopts a one-way thrust ball bearing 7, so that during the lifting process, the lifting ring 3 and the internal body 2 can maintain relative rotation, thereby improving the safety of the lifting process.

[0030] The inner pressure cover 4 is connected to the inner body 2 via a hexagon socket screw 10 .

[0031] A spring 6 is provided between the lifting pin 8 and the outer body 1, and the spring 6 is used to retract the lifting pin 8 into the outer body 1. After the locking member is loosened, the inner body 2 is moved upward by lifting the lifting ring 3, and under the action of the spring 6, all the lifting pins 8 are retracted to complete the unlocking.

[0032] The locking member is an operating screw 9. A plurality of operating screws 9 are arranged around the lifting ring 3 at the top of the outer body 1. The operating screws 9 are threadedly connected to the outer body 1. The bottom of the operating screw 9 penetrates the outer body 1 and contacts the inner body 2. After the inner body 2 moves downward to extend all the lifting pins 8 to complete the locking, the inner body 2 is kept at a fixed distance from the outer body 1 by tightening the operating screws 9, thereby preventing the inner body 2 from being lifted by the lifting ring 3 alone, and further keeping the lifting pins 8 in an extended state, thereby achieving double locking of the locked state.

[0033] The lower end of the operating screw 9 is provided with a spring pin 5. The spring pin 5 is used to prevent the operating screw 9 from being screwed out.

[0034] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lifting and transporting tool for an underwater tubing hanger and a hole protection device, characterized in that: It includes an external body, an internal body, a lifting ring, a lifting pin and a locking piece; a plurality of through holes are circumferentially arranged on the side wall of the external body, a lifting pin is arranged in each through hole, and the length of the lifting pin is greater than the thickness of the side wall of the external body; the internal body is slidably arranged in the external body, and the internal body is used to make the outer end of the lifting pin extend out of the side wall of the external body; the bottom of the lifting ring passes through the top of the external body and is connected to the internal body; the locking piece is arranged on the top of the external body, and the locking piece is used to control the height of the internal body in the external body.

2. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 1, characterized in that: The outer body is a cylindrical structure. A receiving cavity is arranged in the outer body. The bottom of the receiving cavity is open. The inner body is arranged in the receiving cavity.

3. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 1, characterized in that: The inner body is a circular ring structure, a guide surface is provided in the middle and lower part of the outer wall of the inner body, the middle and upper part of the outer wall of the inner body is a vertical surface, the guide surface is used to push the lifting pin out, and the vertical surface is used to keep the lifting pin in the pushed-out state.

4. The lifting and transporting tool for the underwater tubing hanger and the hole protection device according to claim 3, characterized in that: An inner pressure cover is arranged on the top of the inner body, the lower part of the lifting ring is connected to the center of the inner pressure cover, and the bottom of the locking member is pressed against the upper surface of the inner pressure cover to keep the inner body at a predetermined height.

5. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 4, characterized in that: The bottom of the lifting ring is connected to the inner pressure cover through an external hexagon screw, and the external hexagon screw penetrates the inner pressure cover and is threadedly connected to the bottom of the lifting ring.

6. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 5, characterized in that: A bearing is arranged between the end of the external hexagonal screw and the lower bottom surface of the inner pressure cover.

7. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 4, characterized in that: The inner pressure cover is connected to the inner body via hexagon socket screws.

8. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 1, characterized in that: A spring is provided between the lifting pin and the outer body, and the spring is used to retract the lifting pin into the outer body.

9. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 1, characterized in that: The locking member is an operating screw. A plurality of the operating screws are arranged around the lifting ring on the top of the outer body. The operating screws are threadedly connected to the outer body. The bottom of the operating screw passes through the outer body and contacts the inner body.

10. The lifting and transporting tool of the underwater tubing hanger and the hole protection device according to claim 9, characterized in that: A spring pin is arranged at the lower end of the operating screw.

Images