Auxiliary dismounting tool for Christmas tree valve assembly

Abstract

The utility model discloses an auxiliary dismounting tool for a Christmas tree valve assembly. The technical problems that the dismounting efficiency of the Christmas tree valve assembly is low, other operation windows are occupied, and safety risks exist are solved. The device comprises a supporting frame, a supporting seat and a hoisting mechanism, the supporting frame is used for being connected with a flange plate of the Christmas tree, the supporting frame comprises two horizontal and parallel limiting plates, the two limiting plates are connected through at least one limiting bolt, and the two limiting plates jointly clamp the flange plate of the Christmas tree; the two limiting plates are each provided with at least one limiting hole, and the limiting holes correspond to flange bolts of the Christmas tree in position so that the flange bolts can penetrate through the corresponding limiting holes. The auxiliary dismounting tool can be directly installed on the Christmas tree, the valve assembly of the Christmas tree can be dismounted and mounted conveniently, the dismounting and mounting efficiency of the valve assembly of the Christmas tree is effectively improved, the safety risk is reduced, other operation windows cannot be occupied, and the operation cost can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of disassembly and assembly of Christmas tree valve assemblies, and particularly relates to an auxiliary disassembly and assembly tooling for Christmas tree valve assemblies. Background Art

[0002] Nowadays, with the increasing development of offshore oil and gas wells, during the production operation of oil and gas wells, problems often occur in the Christmas tree valve assemblies. Therefore, it is necessary to timely repair and replace the damaged valve assemblies. However, due to the relatively heavy valve assemblies and the very narrow area of the offshore Christmas tree, the operation space is limited, and the process of replacing the valve assemblies often requires the cooperation of a workover rig or a crane.

[0003] Currently, the following problems exist in the disassembly, assembly and replacement operations of offshore oilfield Christmas tree valve assemblies:

[0004] (1) Low efficiency: Due to corrosion or valve failures of the offshore platform Christmas tree, it is necessary to replace the Christmas tree valve assemblies, and the operation frequency of replacing and installing the valve assemblies is very high. However, the operation process requires the cooperation of personnel or tooling from other positions, resulting in relatively low operation efficiency.

[0005] (2) Occupying other operation windows: Since the valve assemblies are very heavy and some valve assemblies are relatively high from the platform deck and cannot be lifted only by manual force, currently, it mainly relies on the platform crane or the hook load of the workover rig to provide the suspension fulcrum and lifting load capacity, and realizes the replacement of the valve assemblies through cooperation with the wellhead, which not only occupies other operation times but also has the risk of cross-operation.

[0006] (3) There are safety risks: There are blind spots in the cooperation between the upper and lower decks of the deck. The replacement operation of the valve assemblies requires the cooperation of a workover rig or a crane, and there are problems such as poor communication during the cooperation process, resulting in potential safety hazards and high operation risks. Summary of the Utility Model

[0007] In order to solve all or part of the above problems, the purpose of the utility model is to provide an auxiliary disassembly and assembly tooling for Christmas tree valve assemblies, which has functions such as fulcrum suspension, height adjustment, and direction adjustment, can improve the convenience, timeliness and safety of replacing Christmas tree valve assemblies, effectively solve the problems of low efficiency, occupying other operation windows, high safety risks, etc. existing in the replacement of offshore oilfield Christmas tree valve assemblies, reduce the comprehensive cost of valve assembly replacement, and improve production efficiency.

[0008] The utility model provides an auxiliary disassembly and assembly tooling for Christmas tree valve assemblies, including a support frame, a support seat and a lifting mechanism. The support frame is used to connect with the flange of the Christmas tree. The support seat is arranged on the support frame, and the lifting mechanism is arranged on the support seat and is used for lifting and transporting the valve assembly of the Christmas tree.

[0009] The support frame includes two horizontally and parallelly arranged limiting plates. The two limiting plates are connected by at least one limiting bolt, and the two limiting plates jointly clamp the flange of the Christmas tree. At least one limiting hole is respectively arranged on the two limiting plates, and the positions of the limiting holes correspond to those of the flange bolts of the Christmas tree, so that the flange bolts can pass through the corresponding limiting holes.

[0010] Optionally, the support base includes:

[0011] A bearing sleeve, which is pressed between the two limiting plates;

[0012] A support shaft, which is vertically fixed at the bottom of the lifting mechanism;

[0013] A relief hole, which is arranged through the upper limiting plate;

[0014] Wherein, the support shaft passes through the relief hole and is rotationally matched with the bearing sleeve, so that the lifting mechanism can rotate.

[0015] Optionally, a limiting set screw is threadedly connected to the bearing sleeve. The end of the limiting set screw is fixedly connected with a control handwheel. A limiting ring groove is arranged on the side wall of the support shaft, and the end of the limiting set screw away from the control handwheel can be inserted into the limiting ring groove and abuts against the support shaft to fix the support shaft.

[0016] Optionally, step grooves are respectively arranged on one side of the two limiting plates close to each other, and both ends of the bearing sleeve can be respectively inserted into the corresponding step grooves to limit the bearing sleeve.

[0017] Optionally, a limiting ring is fixedly sleeved on the top of the support shaft, and the lower surface of the limiting ring abuts against and limits the upper surface of the upper limiting plate.

[0018] Optionally, the lifting mechanism includes:

[0019] A support arm, which is vertically fixed at the top of the support shaft;

[0020] A lifting arm, which is hinged to the top of the support arm;

[0021] A control winch, which is arranged on the support arm;

[0022] A traction rope, which is wound on the control winch. The traction rope passes over the lifting arm and is connected with a lifting hook;

[0023] A control member, which is arranged on the support arm and is used to control the lifting of the lifting arm.

[0024] Optionally, the lifting arm includes:

[0025] A support pipe, hinged to the top of the support pipe;

[0026] A support rod, slidably arranged inside the support pipe;

[0027] A limiting member, arranged on the support pipe and used for fixing the support rod.

[0028] Optionally, the limiting member includes:

[0029] A limiting screw, threadedly connected to the support pipe;

[0030] A plurality of limiting grooves, respectively arranged on the support pipe, the plurality of limiting grooves are equidistantly arranged along the length direction of the support rod, and the limiting screw can be threadedly connected to any one of the limiting grooves.

[0031] Optionally, the control member includes a hydraulic cylinder, the tail end of the hydraulic cylinder is hinged to the support arm, and the piston end is hinged to the lifting arm.

[0032] Optionally, the lifting angle of the lifting arm does not exceed 50°.

[0033] From the above technical solutions, it can be seen that the auxiliary disassembly and assembly tooling for the Christmas tree valve assembly provided by the present utility model has the following advantages:

[0034] This auxiliary disassembly and assembly tooling for the Christmas tree valve assembly can be directly installed on the flange of the Christmas tree, taking the flange bolts of the Christmas tree as the anchor points, having a fulcrum suspension function, not occupying other operation windows, and at the same time being able to realize the convenient disassembly and assembly of the Christmas tree valve assembly, effectively improving the disassembly and assembly efficiency of the Christmas tree valve assembly, reducing safety risks, and at the same time saving operation costs.

[0035] Other features and advantages of the present utility model will be described in the subsequent description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings are used to provide a further understanding of the technical solutions of the present utility model, and constitute a part of the specification, and are used together with the embodiments of the present utility model to explain the technical solutions of the present utility model, and do not constitute a limitation to the technical solutions of the present utility model.

[0037] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present utility model;

[0038] Figure 2 It is a schematic diagram of the use state of the embodiment of the present utility model;

[0039] Figure 3 It is a cross-sectional view of the support frame and the support seat in the embodiment of the present utility model.

[0040] Description of the reference numerals:

[0041] 1. Support frame; 11. Limit plate; 12. Limit bolt; 13. Limit hole; 2. Support base; 21. Bearing sleeve; 22. Support shaft; 23. Relief hole; 24. Step groove; 25. Limit set screw; 26. Control handwheel; 27. Limit ring groove; 28. Positioning ring; 3. Lifting mechanism; 31. Support arm; 32. Lifting arm; 321. Support pipe; 322. Support rod; 33. Control winch; 34. Towing rope; 35. Lifting hook; 36. Control push rod; 4. Control member; 41. Hydraulic cylinder; 5. Limiting member; 51. Limit screw; 52. Limit groove. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined arbitrarily with each other.

[0043] As shown in Figure 1 , Figure 2 , Figure 3 This is an embodiment of the present utility model, in which an auxiliary disassembly and assembly tool for a Christmas tree valve assembly is disclosed, including a support frame 1, a support base 2 and a lifting mechanism 3. The support frame 1 is used to connect with the flange of the Christmas tree. The support base 2 is arranged on the support frame 1, and the lifting mechanism 3 is arranged on the support base 2 and is used for lifting the Christmas tree valve assembly.

[0044] In one embodiment, as shown in Figure 1 , Figure 3 , the support frame 1 includes two horizontally arranged limit plates 11. The two limit plates 11 are arranged in parallel, one above the other. The two limit plates 11 are connected by at least one limit bolt 12, and the two limit plates 11 jointly clamp the flange of the Christmas tree. At the same time, at least one limit hole 13 is respectively arranged on the two limit plates 11. The position of the limit hole 13 corresponds to the position of the flange bolt of the Christmas tree, so that the flange bolt can pass through the corresponding limit hole 13.

[0045] Align the limit holes 13 on the two limit plates 11 with the corresponding flange bolts, and then jointly clamp the flange by the two limit plates 11. At this time, the flange bolt passes through the corresponding limit hole 13, and then the two limit plates 11 are fixed by the limit bolt 12, thereby realizing the connection between the support frame 1 and the Christmas tree. Immediately afterwards, the Christmas tree valve assembly is lifted by the lifting mechanism 3, and the disassembly of the Christmas tree valve assembly can be realized.

[0046] The auxiliary disassembly and assembly tool for the production tree valve assembly in this embodiment can be directly installed on the flange of the production tree, using the flange bolts of the production tree as the anchor points, with the function of fulcrum suspension, without occupying other operation windows. At the same time, it can realize the convenient disassembly and assembly of the production tree valve assembly, effectively improve the disassembly and assembly efficiency of the production tree valve assembly, reduce safety risks, and also save operation costs.

[0047] In this embodiment, one limit bolt 12 is provided. In other embodiments, according to the size of the limit plate 11, multiple limit bolts 12 can also be provided. At the same time, two are provided on each limit plate 11, that is, the ends of two adjacent flange bolts can respectively pass through the corresponding limit holes 13 to realize the limit between the limit plate 11 and the flange. Of course, in other embodiments, the number of limit holes 13 can also be multiple, which will not be listed in detail here.

[0048] In one embodiment, as Figure 1 、 Figure 3 shown, the support base 2 includes a bearing sleeve 21 and a support shaft 22. The bearing sleeve 21 is pressed between two limit plates 11, and the support shaft 22 is vertically fixed to the bottom of the hoisting mechanism 3. At the same time, a relief hole 23 is provided through the upper limit plate 11. The support shaft 22 passes through the relief hole 23 and is inserted into the bearing sleeve 21, and the support shaft 22 is rotatably matched with the bearing sleeve 21 so that the hoisting mechanism 3 can rotate.

[0049] In one embodiment, as Figure 1 、 Figure 3 shown, stepped grooves 24 are respectively provided on one side of the two limit plates 11 close to each other. The two ends of the bearing sleeve 21 can be respectively caught in the corresponding stepped grooves 24 to realize the limit of the bearing sleeve 21. In this embodiment, when the two limit plates 11 press and fix the bearing sleeve 21, the distance between the two limit plates 11 is the same as the thickness of the flange of the production tree.

[0050] In one embodiment, as Figure 1 、 Figure 3 shown, a limit set screw 25 is threadedly connected to the bearing sleeve 21. The end of the limit set screw 25 is fixedly connected with a control handwheel 26. A limit ring groove 27 is provided on the side wall of the support shaft 22, and the end of the limit set screw 25 away from the control handwheel 26 can be caught in the limit ring groove 27 and abutted against the support shaft 22 to realize the fixation of the support shaft 22. Through the cooperation of the limit set screw 25 and the limit groove 52, the fixation of the support shaft 22 can be realized, which can effectively prevent the object from rotating during hoisting and ensure the safety of the operation.

[0051] In one embodiment, as Figure 1 、 Figure 3As shown, a positioning ring 28 is fixedly sleeved on the top of the support shaft 22. When the support shaft 22 is inserted into the bearing sleeve 21 and the lower surface of the positioning ring 28 abuts against the upper surface of the upper limiting plate 11, the limiting set screw 25 is aligned with the limiting groove 52, thereby realizing the limitation of the installation position of the support shaft 22.

[0052] In one embodiment, as Figure 1 、 Figure 2 shown, the lifting mechanism 3 includes a vertically arranged support arm 31. The support shaft 22 is vertically fixed to the bottom of the support arm 31, and a lifting arm 32 is hinged to the top of the support arm 31. A control winch 33 is arranged on the support arm 31. A towing rope 34 is wound around the control winch 33. The towing rope 34 passes over the lifting arm 32 and is connected to a lifting hook 35. At the same time, a control member 4 is arranged on the support arm 31, and the control member 4 is used to control the lifting of the lifting arm 32.

[0053] In one embodiment, as Figure 1 、 Figure 2 shown, the lifting arm 32 includes a support tube 321 and a support rod 322. The support tube 321 is hinged to the top of the support tube 321. The support rod 322 is slidably arranged in the support tube 321 so that the overall length of the lifting arm 32 can be adjusted. At the same time, a limiting member 5 is arranged on the support tube 321, and the limiting member 5 is used to fix the support rod 322.

[0054] In one embodiment, as Figure 1 、 Figure 2 shown, the limiting member 5 includes a limiting screw 51 threadedly connected to the support tube 321. A plurality of limiting grooves 52 are arranged on the support rod 322. The plurality of limiting grooves 52 are arranged at equal intervals along the length direction of the support rod 322, and the limiting screw 51 can be threadedly connected to any one of the limiting grooves 52.

[0055] In one embodiment, as Figure 1 、 Figure 2 shown, a control push rod 36 is arranged at the middle position of the support arm 31 so that the staff can quickly rotate the lifting mechanism 3 by pushing the control push rod 36. In this embodiment, the control push rod 36 is hinged to the support arm 31, and the control push rod 36 can rotate in the vertical direction so that the control push rod 36 can be closely attached to the support arm 31 when it is stored.

[0056] In this embodiment, the telescopic length of the lifting arm 32 is designed in four sections, that is, there are four limit slots 52, and the strength of the lifting arm 32 is sufficient to safely lift an object of the designed weight at the longest end. During use, the length of the lifting arm 32 can be appropriately adjusted according to the distance between the lifting point position and the center of the rotating axis, and the angle of the lifting arm 32 can be fine-tuned in conjunction with the control member 4 to reach the accurate lifting position. In this embodiment, the support arm 31, the support tube 321, the support rod 322, and the control winch 33 are respectively made of aluminum alloy to achieve a lightweight design.

[0057] In one embodiment, Figure 1 , Figure 2 As shown, the control member 4 includes a hydraulic cylinder 41, the tail end of the hydraulic cylinder 41 is hinged to the support arm 31, and the piston end is hinged to the support tube 321. In this embodiment, the hydraulic cylinder 41 is a bidirectional hydraulic cylinder 41, and the lifting angle of the lifting arm 32 does not exceed 50°.

[0058] In this embodiment, the control winch 33 adopts gear transmission, and adopts a method of meshing a small and a large gear with each other. When the winch handle is cranked, the small gear rotates first, and then drives the large gear to rotate, and the rotation of the large gear drives the lifting of the traction rope 34. The small gear drives the large gear, which can save more effort, and the gear has a two-way self-locking function to prevent the sudden fall of heavy objects and protect the safety of people and objects. This design has accurate transmission ratio, high efficiency, compact structure and long service life.

[0059] From the above process, it can be seen that the auxiliary disassembly and assembly tool can be directly installed on the oil production tree without occupying other operating equipment and windows. The replacement operation can be carried out at any time without the need for auxiliary operations by operators or equipment in other positions. Maintenance operators can carry out timely replacement with their own auxiliary equipment.

[0060] At the same time, the auxiliary disassembly and assembly tool is modularly designed, which is convenient for disassembly, assembly and maintenance, and reduces maintenance costs. Some parts of the auxiliary disassembly and assembly tool are made of high-strength aluminum alloy, which greatly reduces the weight. Only 2-3 people are needed to complete the assembly work, saving the personnel and equipment for scaffolding construction, and there is no need to use the platform crane and rope operators.

[0061] Moreover, the lifting arm 32 can be freely extended and rotated, and the height is adjustable, which is more convenient to assist the valve replacement operation of the oil tree. At the same time, it cooperates with the manual control winch 33 to save trouble and labor, and the two-way self-locking function makes the replacement operation of the oil tree valve assembly safer and more reliable.

[0062] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should have the common meanings understood by technicians in the field to which the present invention belongs.

[0063] Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An auxiliary disassembly and assembly tooling for a Christmas tree valve assembly, characterized in that, It comprises a support frame (1), a support seat (2) and a lifting mechanism (3), wherein the support frame (1) is used to be connected to a flange of an oil tree, the support seat (2) is arranged on the support frame (1), and the lifting mechanism (3) is arranged on the support seat (2) and is used to lift the valve assembly of the oil tree; The support frame (1) comprises two horizontal and parallel limit plates (11), the two limit plates (11) are connected by at least one limit bolt (12), and the two limit plates (11) are used to clamp the flange of the Christmas tree together, and at least one limit hole (13) is respectively arranged on the two limit plates (11), and the limit hole (13) corresponds to the position of the flange bolt of the Christmas tree, so that the flange bolt can pass through the corresponding limit hole (13).

2. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 1, wherein, The support base (2) comprises: A bearing sleeve (21) is pressed tightly between the two limiting plates (11); A support shaft (22) vertically fixed to the bottom of the lifting mechanism (3); A clearance hole (23) is provided through the limiting plate (11) located above; The support shaft (22) passes through the clearance hole (23) and is rotatably matched with the bearing sleeve (21) so that the lifting mechanism (3) can rotate.

3. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 2, characterized in that, The bearing sleeve (21) is threadedly connected with a limit screw (25), and the end of the limit screw (25) is fixedly connected with a control hand wheel (26). The side wall of the support shaft (22) is provided with a limit ring groove (27), and the end of the limit screw (25) away from the control hand wheel (26) can be inserted into the limit ring groove (27) and pressed against the support shaft (22) to achieve the fixation of the support shaft (22).

4. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 2, characterized in that, A step groove (24) is provided on one side of the two limiting plates (11) close to each other, and the two ends of the bearing sleeve (21) can be respectively inserted into the corresponding step groove (24) to achieve the limiting of the bearing sleeve (21).

5. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 2, characterized in that, A positioning ring (28) is provided on the top fixing sleeve of the support shaft (22), and the lower surface of the positioning ring (28) abuts against the upper surface of the limiting plate (11) located above for limiting position.

6. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 2, wherein, The lifting mechanism (3) comprises: A support arm (31) vertically fixed to the top of the support shaft (22); A lifting arm (32) is hinged to the top of the supporting arm (31); A control winch (33) is arranged on the support arm (31); A traction rope (34) is wound around the control winch (33), the traction rope (34) spans the lifting arm (32) and is connected to a lifting hook (35); A control component (4) is arranged on the support arm (31) and is used to control the lifting of the lifting arm (32).

7. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 6, wherein The lifting arm (32) comprises: A support tube (321), hinged to the top of the support tube (321); A support rod (322) is slidably disposed in the support tube (321); A limiting member (5) is arranged on the supporting tube (321) and is used to fix the supporting rod (322).

8. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 7, wherein The limiting member (5) comprises: The limit screw (51) is threadedly connected to the support tube (321); The limit grooves (52) are multiple in number and are respectively arranged on the support tube (321). The multiple limit grooves (52) are arranged at equal intervals along the length direction of the support rod (322), and the limit screw (51) can be threadedly connected to any one of the limit grooves (52).

9. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 6, characterized in that, The control member (4) includes a hydraulic cylinder (41). The tail end of the hydraulic cylinder (41) is hinged to the support arm (31), and the piston end is hinged to the lifting arm (32).

10. The auxiliary disassembly and assembly tooling for the Christmas tree valve assembly according to claim 6, characterized in that, The lifting angle of the lifting arm (32) does not exceed 50°.

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