Christmas tree isolation sleeve dismounting assembly

Abstract

The utility model relates to the technical field of Christmas tree maintenance, in particular to a Christmas tree isolation sleeve dismounting and mounting assembly. Comprising a bottom plate, a square sleeve is concentrically fixed to the upper end of the bottom plate, a square rod is elastically and slidably connected to the interior of the square sleeve in the vertical direction, an upper disc is concentrically fixed to the upper end of the square rod, long holes are formed in the two sides of the upper disc, bolts are arranged in the long holes, and nuts are in threaded connection with the bolts above the upper disc; two elastic rods are fixed to the two sides of the center rod, the upper ends of the elastic rods are fixedly connected with the center rod, the lower ends of the elastic rods incline towards the outer side of the center rod, the lower end of the center rod is fixedly sleeved with a lantern ring, and a protruding block is fixed to one side of the lantern ring. Through mechanical linkage, elastic self-adaption and modular design, the problems that in the traditional dismounting technology, hoisting dependence is high, operation is tedious, and potential safety hazards are large are solved, high efficiency, safety and generalization of dismounting of the isolation sleeve of the Christmas tree are achieved, and the device is particularly suitable for industrial scenes with limited space.

Description

Technical Field

[0001] This utility model relates to the field of oil well maintenance technology, specifically to an oil well isolation sleeve disassembly and assembly component. Background Technology

[0002] Before leaving the factory and before being put into use on the platform, or during initial maintenance, wellheads typically undergo thorough inspections, such as the disassembly and assembly of internal components like the isolation sleeve. In existing technology, to facilitate these operations, the conventional practice is to set up a pit-like area at the factory or on the platform, where the wellhead is placed above the pit, exposing its lower part for these operations. This method has several drawbacks: long-term storage occupies workspace, especially on relatively confined offshore oil platforms, reducing space utilization; it also poses safety hazards, as personnel are prone to falling and getting injured; furthermore, during operations, the limited lighting below hinders operation and communication among multiple personnel, reducing the efficiency of the inspection or maintenance work. The disassembly and assembly of the wellhead isolation sleeve is particularly problematic. Because the isolation sleeve is located inside the wellhead, and the lower end of the wellhead is funnel-shaped with a narrow space, if personnel are directly below during disassembly and assembly, they are easily affected by falling components or fluids from inside the wellhead. This directly makes the disassembly and assembly of the wellhead isolation sleeve particularly cumbersome, impacting work efficiency.

[0003] To address the aforementioned technical issues, patent document CN217345353U discloses a pre-works tree isolation sleeve disassembly and assembly assembly, comprising: a rotary disassembly and assembly device, including a rotating column, the upper part of which has a locking structure that cooperates with the lower end of the isolation sleeve, the rotary disassembly and assembly device being able to extend into the pre-works tree from below and engage with the isolation sleeve through the locking structure; and a support platform for supporting the pre-works tree and providing a height operating space below the pre-works tree for the rotary disassembly and assembly device to extend into the pre-works tree from below. When installing or removing the isolation sleeve, first hoist the wellhead onto the support platform's load-bearing piles. The rotating column is then placed vertically below the wellhead via the base. The isolation sleeve is then placed on the support plate, and the locking mechanism and / or upper boss engage with the sleeve. The hoisting cable passes through the wellhead from above, and the rotating column is lifted and slowly lowered into the wellhead. Once in place, the operator can easily rotate the rotating column by gripping the grab hole to install the isolation sleeve into the wellhead. To remove the isolation sleeve, the same method is used: the rotating column is placed vertically below the wellhead via the base, and the hoisting cable passes through the wellhead from above, and the rotating column is lifted and slowly lowered into the wellhead. Once in the correct height, the rotating column is rotated again to engage the locking mechanism and / or upper boss with the isolation sleeve. Then, the rotation is reversed to loosen the connecting threads of the isolation sleeve. After complete loosening, the lower end of the rotating column falls into the groove, allowing the hoisting cable to be removed. However, the process of disassembling and assembling the isolation sleeve requires using a hoisting cable to pass through the oil well tree from above and then lift the rotating column as a whole, which is a rather complicated operation. Utility Model Content

[0004] The main purpose of this utility model is to provide a disassembly and assembly component for easy disassembly and assembly of the oil well tree isolation sleeve.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] The oil well isolation sleeve assembly includes a base plate. A square sleeve is concentrically fixed to the upper end of the base plate. A square rod is elastically slidably connected vertically inside the square sleeve. An upper plate is concentrically fixed to the upper end of the square rod. Elongated holes are opened on both sides of the upper plate. The two elongated holes are symmetrically arranged according to the axis of the upper plate. The length direction of the elongated holes is parallel to the radial direction of the upper plate. Bolts are installed in the elongated holes and pass through the elongated holes. Nuts are threaded onto the bolts above the upper plate. A central rod is concentrically fixed to the upper end of the upper plate. Two elastic rods are fixed on both sides of the central rod. The two elastic rods are symmetrically arranged according to the axis of the central rod. The upper ends of the elastic rods are fixedly connected to the central rod, and the lower ends of the elastic rods are inclined outward from the central rod. A collar is fitted and fixed to the lower end of the central rod. A protrusion is fixed to one side of the collar.

[0007] Specifically, the bottom of the base plate is fixed with multiple casters.

[0008] Specifically, the square rod is hollow inside.

[0009] Specifically, the lower end of the square rod is connected to the base plate by a spring.

[0010] Specifically, each of the side walls of the square sleeve has a vertical groove, and a handle is provided in any two opposite vertical grooves. The handle is threadedly connected to the square rod, and a pressure plate is fixed on the handle, which is pressed against the outer wall of the square sleeve.

[0011] Specifically, anti-slip textures are machined on the opposite end faces of the pressure plate and the outer wall of the square sleeve.

[0012] Specifically, the collar and the protrusion are integrally formed.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The isolation sleeve is quickly raised and lowered by a flexible sliding connection between the square rod and the square sleeve, along with a handle clamping mechanism. During operation, simply releasing the handle allows the sleeve to be automatically raised by the spring force, avoiding the cumbersome process of traditional cable hoisting and significantly shortening the assembly and disassembly time.

[0015] 2. The base plate is equipped with casters, which can move components flexibly in confined spaces, making it especially suitable for restricted environments such as offshore platforms, reducing equipment handling and positioning time.

[0016] 3. The anti-slip texture design on the outer wall of the pressure plate and the square sleeve, combined with the threaded handle, provides a stable lock after lifting and lowering, preventing safety hazards caused by equipment slippage during operation.

[0017] 4. When the elastic rods on both sides of the center rod are inserted into the isolation sleeve, they automatically align themselves by adapting to the inner wall, thus avoiding errors caused by manual adjustment and reducing the risk of operational mistakes.

[0018] 5. The elongated hole design on the upper plate allows for adjustment of bolt spacing, adapting to the countersunk hole size of different specifications of isolation sleeves, thus expanding the applicability of the component.

[0019] 6. The hollow square rod reduces the overall weight, while the one-piece molded collar and protrusion improve the structural strength and facilitate maintenance and component replacement.

[0020] 7. The elastic rod and spring structure allows for compensation of equipment installation deviations within a certain range, improving the fault tolerance rate under complex working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the disassembly and assembly of the components.

[0022] Figure 2 This is a side view of the disassembled assembly.

[0023] Figure 3 This is a front view of the assembled / disassembled components.

[0024] Figure 4 This is a schematic diagram of the isolation sleeve.

[0025] The parts in the attached diagram are named as follows: 1. Base plate, 2. Square sleeve, 3. Vertical groove, 4. Handle, 5. Pressure plate, 6. Isolation sleeve, 60. Countersunk hole, 61. Keyway, 7. Square rod, 8. Upper plate, 9. Long hole, 10. Bolt, 11. Nut, 12. Center rod, 13. Elastic rod, 14. Collar, 15. Protrusion, 16. Spring, 17. Caster wheel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] like Figure 4 As shown, the lower end of the isolation sleeve 6 has two countersunk holes 60, which are symmetrically arranged. At the same time, the lower end of the isolation sleeve 6 has a keyway 61.

[0028] Example 1: Refer to Figures 1-3 As shown, the oil well isolation sleeve assembly includes a base plate 1, and multiple casters 17 are fixed to the lower end of the base plate 1.

[0029] A square sleeve 2 is concentrically fixed to the upper end of the base plate 1. A square rod 7 is elastically slidably connected in the vertical direction inside the square sleeve 2. The square rod 7 is hollow inside. The hollow design of the square rod 7 can reduce the weight of this disassembly and assembly assembly.

[0030] An upper plate 8 is concentrically fixed at the upper end of the square rod 7. Long holes 9 are opened on both sides of the upper plate 8. The two long holes 9 are symmetrically arranged according to the axis of the upper plate 8. The length direction of the long holes 9 is parallel to the radial direction of the upper plate 8. Bolts 10 are installed in the long holes 9. The bolts 10 pass through the long holes 9. Nuts 11 are threaded on the bolts 10 above the upper plate 8.

[0031] A central rod 12 is concentrically fixed at the upper end of the upper plate 8, and a collar 14 is sleeved and fixed at the lower end of the central rod 12. A protrusion 15 is fixed on one side of the collar 14, and the collar 14 and the protrusion 15 are integrally formed.

[0032] Each side wall of the square sleeve 2 has a vertical groove 3. A handle 4 is installed in any two opposite vertical grooves 3. The handle 4 is threaded to the square rod 7. A pressure plate 5 is fixed on the handle 4 and presses tightly against the outer wall of the square sleeve 2. Anti-slip textures are machined on the opposite end faces of the pressure plate 5 and the outer wall of the square sleeve 2.

[0033] When the isolation sleeve 6 needs to be installed, the production tree is supported by the support platform. Then, the square rod 7 moves downward inside the square sleeve 2 and compresses the spring 16. The handle 4 is rotated to make the pressure plate 5 press against the square sleeve 2, thereby positioning the square rod 7. Loosen the nut 11 and adjust the center distance of the two bolts 10 so that the center distance of the two bolts 10 is equal to the center distance of the two countersunk holes 60 of the isolation sleeve 6. The isolation sleeve 6 is placed on the center rod 12, and the upper end of the bolt 10 is inserted into the corresponding countersunk hole 60. The collar 14 enters the lower end of the isolation sleeve 6, and the protrusion 15 is located in the keyway 61. Move this disassembly and assembly component and the isolation sleeve 6 so that the isolation sleeve 6 is below the production tree. Loosen the handle 4. Under the elastic force of the spring 16, the square rod 7 drives the isolation sleeve 6 upward into the installation position inside the production tree. Then, the handle 4 is used to rotate this disassembly and assembly component and the isolation sleeve 6. During the rotation of this disassembly and assembly component and the isolation sleeve 6, the isolation sleeve 6 can be threadedly connected inside the production tree. After the isolation sleeve 6 is installed in place, the square rod 7 is lowered by the handle 4. When the upper end of the center rod 12 is below the oil production tree, the disassembly and assembly assembly is moved, and the installation of the isolation sleeve 6 is completed.

[0034] When it is necessary to disassemble the isolation sleeve 6, the production tree is supported by the support platform. Then, the square rod 7 moves downward inside the square sleeve 2 and compresses the spring 16. The handle 4 is turned so that the pressure plate 5 presses the square sleeve 2, thereby positioning the square rod 7. Loosen the nut 11 and adjust the center distance of the two bolts 10 so that the center distance of the two bolts 10 is equal to the center distance of the two countersunk holes 60 of the isolation sleeve 6. Move this disassembly and assembly assembly so that it is located below the production tree and corresponds vertically to the isolation sleeve 6. Loosen the handle 4, and under the elastic force of the spring 16, the square rod 7 moves upward and enters the production tree. After the center rod 12 enters the isolation sleeve 6, the upper end of the bolt 10 is inserted into the corresponding countersunk hole 60, the collar 14 enters the lower end of the isolation sleeve 6, and the protrusion 15 is located in the keyway 61. Then, by using the handle 4, this disassembly and assembly assembly drives the isolation sleeve 6 in the production tree to rotate. During the rotation of this disassembly and assembly assembly and the isolation sleeve 6, the isolation sleeve 6 can be unscrewed from the production tree. During the process of the isolation sleeve 6 being unscrewed from the Nose tree, the square rod 7 compresses the spring 16 and moves downward. After the isolation sleeve 6 is unscrewed from the Nose tree, the square rod 7 moves downward through the handle 4. When the upper end of the isolation sleeve 6 is below the Nose tree, the disassembly and assembly assembly and the isolation sleeve 6 are moved, and the disassembly of the isolation sleeve 6 is completed.

[0035] Example 2: Based on Example 1, referring to... Figures 1-3 As shown, two elastic rods 13 are fixed on both sides of the central rod 12. The two elastic rods 13 are symmetrically arranged according to the axis of the central rod 12. The upper end of the elastic rod 13 is fixedly connected to the central rod 12, and the lower end of the elastic rod 13 is inclined to the outside of the central rod 12.

[0036] When disassembling the isolation sleeve 6, two symmetrical elastic rods 13 are set on the central rod 12. After the central rod 12 is inserted into the isolation sleeve 6, the elastic rods 13 press tightly against the inner wall of the isolation sleeve 6. Under the elastic force of the elastic rods 13, this disassembly and assembly assembly can automatically be concentric with the isolation sleeve 6, which facilitates the bolt 10 to be inserted and engaged with the corresponding countersunk hole 60, facilitates the insertion of the collar 14 into the lower end of the isolation sleeve 6, and facilitates the insertion of the protrusion 15 into the keyway 61.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tree trunk isolation sleeve assembly, comprising a base plate (1), wherein a square sleeve (2) is concentrically fixed to the upper end of the base plate (1), characterized in that, A square rod (7) is elastically slidably connected vertically inside the square sleeve (2). An upper plate (8) is concentrically fixed at the upper end of the square rod (7). Elongated holes (9) are provided on both sides of the upper plate (8). The two elongated holes (9) are symmetrically arranged according to the axis of the upper plate (8). The length direction of the elongated holes (9) is parallel to the radial direction of the upper plate (8). Bolts (10) are provided in the elongated holes (9). The bolts (10) penetrate the elongated holes (9). A screw thread is connected to the bolt (10) above the upper plate (8). The mother (11) has a central rod (12) fixed concentrically at the upper end of the upper plate (8). Two elastic rods (13) are fixed on both sides of the central rod (12). The two elastic rods (13) are symmetrically arranged according to the axis of the central rod (12). The upper end of the elastic rod (13) is fixedly connected to the central rod (12). The lower end of the elastic rod (13) is inclined to the outside of the central rod (12). A collar (14) is fixedly fitted on the lower end of the central rod (12). A protrusion (15) is fixed on one side of the collar (14).

2. The oil well tree isolation sleeve disassembly and assembly assembly according to claim 1, characterized in that, The bottom of the base plate (1) is fixed with multiple casters (17).

3. The oil well tree isolation sleeve disassembly and assembly assembly according to claim 1, characterized in that, The square rod (7) is hollow inside.

4. The pre-works tree isolation sleeve disassembly and assembly assembly according to claim 1, characterized in that, The lower end of the square rod (7) is connected to the base plate (1) by a spring (16).

5. The pre-works tree isolation sleeve disassembly and assembly assembly according to claim 1, characterized in that, Each of the side walls of the square sleeve (2) has a vertical groove (3), and a handle (4) is provided in any two opposite vertical grooves (3). The handle (4) is threadedly connected to the square rod (7), and a pressure plate (5) is fixed on the handle (4). The pressure plate (5) is tightly pressed against the outer wall of the square sleeve (2).

6. The pre-works tree isolation sleeve disassembly and assembly assembly according to claim 5, characterized in that, Anti-slip textures are machined on the opposite end faces of the outer walls of the pressure plate (5) and the square sleeve (2).

7. The pre-works tree isolation sleeve disassembly and assembly assembly according to claim 1, characterized in that, The collar (14) and the protrusion (15) are integrally formed.

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