Christmas tree spacer sleeve mechanical matching tool

Abstract

The utility model relates to a mechanical matching tool for an isolation sleeve of a Christmas tree, and relates to the technical field of drilling and completion equipment. The driving cylinder is used for pushing a driving ring of the Christmas tree isolation sleeve to slide towards a locking ring of the Christmas tree isolation sleeve in a first direction; the supporting seat is used for supporting the driving cylinder and the Christmas tree isolation sleeve, and the supporting seat is in sliding connection with the driving cylinder in the first direction; and the bottom plate is fixed at the bottom end of the supporting seat. According to the structure of the Christmas tree spacer sleeve mechanical matching tool, a plurality of first bolts are screwed, one ends of the first bolts make contact with the driving barrel in an abutting mode, and the driving barrel and the driving ring are pushed to slide towards the locking ring of the Christmas tree spacer sleeve in the first direction so as to open the locking ring. According to the Christmas tree locking device, the first bolts are screwed, so that a common upward pushing force can be generated to push the driving cylinder and the driving ring until the locking ring is opened and locked on the locking profile of the Christmas tree body.

Description

Technical Field

[0001] This utility model relates to the field of drilling and completion equipment technology, and in particular to a mechanical accessory tool for a wellhead isolation sleeve. Background Technology

[0002] The pre-works tree isolation sleeve mates with the bottom inner bore of the subsea pre-works tree body and provides a sealing surface between the subsea pre-works tree body and the subsea wellhead. The pre-works tree isolation sleeve has two seals: the upper seal seals with the pre-works tree body, and the lower seal seals with the wellhead or pre-works tree test pile.

[0003] In existing technologies, the isolation sleeve of the submersible tree is usually equipped with a drive ring and a locking ring. The movement of the drive ring drives the locking ring to open and lock it to the bottom of the submersible tree body.

[0004] However, since the drive ring needs to open the locking ring, the pushing force required for its movement is relatively large. Therefore, there is an urgent need to develop a set of tools that are compatible with the wellhead isolation sleeve to drive the drive ring to move and open the locking ring, thereby achieving the installation and locking of the wellhead isolation sleeve. Utility Model Content

[0005] This utility model provides a mechanical accessory tool for the isolation sleeve of the oil well tree, which is used to push the drive ring to move and open the locking ring, thereby realizing the installation and locking of the isolation sleeve of the oil well tree.

[0006] This utility model provides a mechanical accessory tool for an oil well tree isolation sleeve, including:

[0007] A drive cylinder for pushing the drive ring of the wellhead isolation sleeve to slide in a first direction toward the locking ring of the wellhead isolation sleeve; and

[0008] Support base, used to support the drive cylinder and the wellhead isolation sleeve, the support base being slidably connected to the drive cylinder in a first direction; and

[0009] The base plate is fixed to the bottom of the support base;

[0010] The base plate has multiple threaded connection holes extending along the first direction. The mechanical accessory tool for the tree isolation sleeve also includes multiple first bolts, which are correspondingly installed in the multiple threaded connection holes. The mechanical accessory tool for the tree isolation sleeve is constructed by rotating multiple first bolts. One end of each first bolt contacts the drive cylinder and pushes the drive cylinder and drive ring to slide along the first direction toward the locking ring of the tree isolation sleeve to open the locking ring.

[0011] In one embodiment, a suspension step is provided inside the support base, and the wellhead isolation sleeve is placed on the suspension step.

[0012] In one embodiment, a plurality of second bolts are spaced apart on the outer periphery of the support base, and a plurality of strip-shaped sliding holes are provided on the outer periphery of the drive cylinder. The plurality of second bolts are respectively disposed in the plurality of strip-shaped sliding holes, and the second bolts slide in cooperation with the corresponding strip-shaped sliding holes to limit the relative sliding position between the drive cylinder and the support base.

[0013] In one embodiment, a third bolt is provided at the connection between the support base and the base plate, the third bolt being used to fix the support base to the base plate.

[0014] In one embodiment, a through hole is provided at the center line of the base plate, the through hole being used to reduce the weight of the base plate.

[0015] In one embodiment, the mechanical accessory tool for the tree isolation sleeve further includes a locking mechanism. The locking mechanism is disposed on the outer periphery of the end of the drive cylinder that contacts the drive ring, and is used to engage with an annular groove on the drive ring. The mechanical accessory tool for the tree isolation sleeve is configured such that the drive cylinder can drive the drive ring to slide along a first direction away from the tree isolation sleeve, so that the locking ring retracts to its initial state.

[0016] In one embodiment, a plurality of telescopic holes are spaced apart on the outer periphery of the drive cylinder, and the locking mechanism includes a plurality of locking blocks, which are telescopically arranged in the plurality of telescopic holes in a second direction, wherein the plurality of locking blocks can simultaneously extend into the annular groove.

[0017] In one embodiment, a plurality of limiting screw holes are provided on the end of the drive cylinder that contacts the drive ring, extending along the first direction. The plurality of limiting screw holes are connected to a plurality of telescopic holes in a corresponding manner. The mechanical matching tool for the oil well isolation sleeve also includes a plurality of fourth bolts, which are screwed into the plurality of limiting screw holes in a corresponding manner. An annular limiting groove is provided on the outer periphery of the locking block, and the fourth bolts extend into the annular limiting groove of the corresponding locking block to limit the sliding position of the locking block in the second direction.

[0018] In one embodiment, the drive cylinder has a plurality of threaded holes spaced apart at one end near the base plate, and a plurality of connecting holes spaced apart on the base plate. The connecting holes correspond one-to-one with the threaded holes. The mechanical accessory tool for the tree isolation sleeve also includes a plurality of fifth bolts, which are screwed into the threaded holes one-to-one. Tightening the fifth bolts in the mechanical accessory tool for the tree isolation sleeve can drive the drive ring to slide away from the tree isolation sleeve along a first direction, so that the locking ring retracts to its initial state.

[0019] Compared with the prior art, the advantage of this utility model is that by tightening multiple first bolts, one end of each first bolt comes into contact with the drive cylinder. Continuing to tighten the multiple first bolts generates a common upward thrust, sufficient to push the drive cylinder and drive ring until the locking ring opens and locks onto the locking surface of the Christmas tree body. This achieves the installation and locking function of the Christmas tree isolation sleeve using a mechanical matching tool. Attached Figure Description

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the mechanical accessory tool for the wellhead isolation sleeve in an embodiment of this utility model;

[0022] Figure 2 yes Figure 1 Main sectional view of the mechanical accessory tool for the wellhead isolation sleeve (showing the connection relationship with the wellhead isolation sleeve, with the locking ring in the open state);

[0023] Figure 3 yes Figure 1 Main sectional view of the mechanical accessory tool for the production tree isolation sleeve (showing the connection relationship with the production tree isolation sleeve, with the locking ring in the retracted state);

[0024] Figure 4 This is a schematic diagram illustrating the connection relationship between the mechanical matching tool for the wellhead isolation sleeve and the wellhead body in an embodiment of this utility model;

[0025] Figure 5 yes Figure 3 A magnified view of a portion of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the structural composition of the oil well isolation sleeve in an embodiment of this utility model;

[0027] Figure 7 yes Figure 6 A schematic diagram showing the connection relationship between the shear pin, compression spring, shear pin sleeve, and spring cap.

[0028] Figure label:

[0029] 1. Sealing pressure ring; 2. Isolation sleeve body; 3. Locking ring; 4. Drive ring; 41. Annular groove; 5. Stop pin; 6. Shear pin; 7. Compression spring; 8. Shear pin sleeve; 9. Spring cap; 10. Sealing ring; 100. Tree body; 101. Locking profile; 200. Tree isolation sleeve; 500. Tree isolation sleeve mechanical matching tool; 501. Drive cylinder; 5011. Strip groove hole; 502. Support base; 5021. Suspension step; 503. Base plate; 5031. Through hole; 504. First bolt; 505. Second bolt; 506. Third bolt; 507. Locking block; 508. Fourth bolt; 509. Fifth bolt. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] The following reference Figure 6 and Figure 7 The specific structure of the wellhead isolation sleeve 200 is illustrated below:

[0032] The Christmas tree isolation sleeve 200 includes an isolation sleeve body assembly, a locking ring 3, and a drive mechanism. The isolation sleeve body assembly has one end sealed to the bottom end of the Christmas tree body 100, and the other end sealed to the subsea wellhead. The locking ring 3 is fitted onto the outer periphery of the isolation sleeve body assembly. The drive mechanism is fitted onto the outer periphery of the isolation sleeve body assembly and placed on the locking ring 3. The drive mechanism drives the locking ring 3 to open and lock it onto the locking surface 101 at the bottom end of the Christmas tree body 100. The drive mechanism includes a drive ring 4 and a locking mechanism. The drive ring 4 can move along a third direction (…). Figure 4 The drive ring 4 slides horizontally and extends into the locking ring 3 to open the locking ring 3. The oil tree isolation sleeve 200 is configured such that when the drive ring 4 opens the locking ring 3, the locking mechanism locks the current sliding position of the drive ring 4.

[0033] It should be noted that the drive mechanism of the production tree isolation sleeve 200 is equipped with a locking mechanism, which locks the drive ring 4 in the sliding position that allows the drive ring 4 to open the locking ring 3. This prevents the drive ring 4 from sliding away from the locking ring 3, thereby preventing the locking ring 3 from retracting and ensuring the stability and reliability of the locking of the locking ring 3. This avoids the problem in the prior art where the production tree isolation sleeve 200 falls into the subsea wellhead due to the retraction of the locking ring 3. This ensures that oil production operations can be carried out smoothly on site.

[0034] Specifically, in one embodiment, the isolation sleeve body assembly includes an isolation sleeve body 2 and a sealing assembly. The isolation sleeve body 2 has one end inserted into the bottom end of the Christmas tree body 100, and the other end inserted into the subsea wellhead. The sealing assembly is respectively disposed at both ends of the isolation sleeve body 2. The sealing assembly is used to seal the annular gap between the isolation sleeve body 2 and the Christmas tree body 100, or to seal the annular gap between the isolation sleeve body 2 and the subsea wellhead.

[0035] Specifically, in one embodiment, the sealing assembly includes a sealing ring 10 and a sealing pressure ring 1. The sealing ring 10 is sleeved on the outer periphery of the isolation sleeve body 2; the sealing pressure ring 1 is sleeved on the outer periphery of the isolation sleeve body 2 and is used to support the sealing ring 10.

[0036] Specifically, in one embodiment, the sealing ring 10 is a MEC sealing ring.

[0037] Specifically, in one embodiment, the locking ring 3 is provided with a notch, and the locking ring 3 is configured such that the drive ring 4 can slide along a third direction and extend into the locking ring 3 to open the locking ring 3 radially along the isolation sleeve body assembly.

[0038] It should be noted that the initial gap is small, and the gap widens when the locking ring 3 opens. The locking ring 3 has an elastic contraction function. When the locking ring 3 is not subjected to external force, it retracts to its initial state.

[0039] Specifically, in one embodiment, a limiting structure is provided on the drive mechanism to limit the extreme position of the drive ring 4 reciprocating along a third direction.

[0040] Specifically, in one embodiment, the outer periphery of the drive ring 4 is provided with a plurality of strip holes along its radial direction, and the limiting structure includes a plurality of stop pins 5. The plurality of stop pins 5 are inserted into the plurality of strip holes one by one and fixed on the isolation sleeve body assembly. The stop pins 5 can abut against the two ends of the corresponding strip holes to limit the extreme position of the drive ring 4 reciprocating along a third direction.

[0041] It should be noted that by utilizing the contact between the two ends of the slotted hole and the stop pin 5, two sliding limit positions of the drive ring 4 in a third direction can be defined. When it is in the first sliding limit position, the drive ring 4 fully expands the locking ring 3. The locking ring 3 is locked onto the locking surface 101. When it is in the second sliding limit position, the drive ring 4 retracts to its initial state, and the stop pin 5 prevents the drive ring 4 from dislodging from the isolation sleeve body assembly.

[0042] Specifically, in one embodiment, four strip-shaped holes are provided on the outer periphery of the drive ring 4 along its radial direction. The limiting structure includes four stop pins 5, which are correspondingly inserted into the four strip-shaped holes and fixed on the isolation sleeve body assembly. The stop pins 5 can abut against the two ends of the corresponding strip-shaped holes to limit the extreme position of the drive ring 4 reciprocating along a third direction.

[0043] Of course, in alternative embodiments not shown in the accompanying drawings of this application, the number of stop pins 5 and strip holes can be set to three or five or more, depending on the actual situation.

[0044] Specifically, in one embodiment, a locking hole is provided on the outer periphery of the isolation sleeve body assembly, and a mounting hole is provided on the outer periphery of the drive ring 4. The locking mechanism includes a shear pin 6, a shear pin sleeve 8, a spring cap 9, and a compression spring 7. The shear pin 6 extends and retracts radially within the mounting hole along the drive ring 4; the shear pin sleeve 8 is sleeved on the outer periphery of the shear pin 6; the spring cap 9 is fixed at the opening of the mounting hole; and the compression spring 7 is disposed within the mounting hole, sleeved on the shear pin 6, and located between the spring cap 9 and the drive ring 4. The oil well isolation sleeve 200 is configured such that when the drive ring 4 opens the locking ring 3, the locking hole and the mounting hole are concentric, and the compression spring 7 can push the shear pin sleeve 8 and the shear pin 6 radially into the locking hole to lock the current sliding position of the drive ring 4.

[0045] It should be noted that the upward drive ring 4 can cut the shear pin 6, thereby unlocking the oil well tree isolation sleeve 200.

[0046] Specifically, in one embodiment, a plurality of locking holes are spaced apart on the outer periphery of the isolation sleeve body assembly, a plurality of mounting holes are spaced apart on the outer periphery of the drive ring 4, and a plurality of locking mechanisms are provided, each locking mechanism being disposed in a corresponding manner within a plurality of mounting holes, and a plurality of shear pins 6 being able to extend into a plurality of locking holes in a corresponding manner.

[0047] Specifically, in one embodiment, the outer periphery of the isolation sleeve body 2 is provided with a plurality of locking holes at intervals, the outer periphery of the drive ring 4 is provided with a plurality of mounting holes at intervals, the number of locking mechanisms is plurality of, the plurality of locking mechanisms are respectively disposed in the plurality of mounting holes, and the plurality of shear pins 6 can be respectively inserted into the plurality of locking holes.

[0048] Specifically, in one embodiment, the outer periphery of the isolation sleeve body 2 is provided with two locking holes spaced apart, the outer periphery of the drive ring 4 is provided with two mounting holes spaced apart, the number of locking mechanisms is two, the two locking mechanisms are respectively arranged in the two mounting holes, and the two shear pins 6 can be respectively inserted into the two locking holes.

[0049] Specifically, in one embodiment, the isolation sleeve body 2 is provided with an annular step for placing the locking ring 3. This ensures that the locking ring 3 can contract or expand on the annular step. The annular step always supports the contraction or expansion of the locking ring 3, thereby improving the stability and reliability of the contraction or expansion of the locking ring 3.

[0050] The following reference Figures 1 to 5 As shown, the specific structure of the 500 mechanical accessory tool for the wellhead isolation sleeve is illustrated below:

[0051] The oil well isolation sleeve mechanical accessory tool 500 includes a drive cylinder 501, a support base 502, and a base plate 503. The instrument includes a drive cylinder 501, which pushes the drive ring 4 of the tree isolation sleeve 200 to slide along the first direction toward the locking ring 3 of the tree isolation sleeve 200; a support base 502, which supports the drive cylinder 501 and the tree isolation sleeve 200, and the support base 502 is slidably connected to the drive cylinder 501 in the first direction; a base plate 503, which is fixed to the bottom end of the support base 502; a plurality of threaded connection holes are provided on the base plate 503 extending along the first direction; the tree isolation sleeve mechanical accessory tool 500 also includes a plurality of first bolts 504, which are respectively arranged in the plurality of threaded connection holes; the tree isolation sleeve mechanical accessory tool 500 is constructed as a knob with a plurality of first bolts 504, one end of which abuts against the drive cylinder 501 and pushes the drive cylinder 501 and the drive ring 4 to slide along the first direction toward the locking ring 3 of the tree isolation sleeve 200, so as to open the locking ring 3.

[0052] In the above setup, by tightening multiple first bolts 504, one end of each first bolt 504 comes into contact with the drive cylinder 501. Continuing to tighten the multiple first bolts 504 generates a common upward thrust, sufficient to push the drive cylinder 501 and drive ring 4 until the locking ring 3 opens and locks onto the locking surface 101 of the tree housing 100. This achieves the installation and locking function of the tree isolation sleeve mechanical accessory tool 500 on the tree isolation sleeve 200.

[0053] Specifically, in one embodiment, a suspension step 5021 is provided inside the support base 502, and the oil well isolation sleeve 200 is placed on the suspension step 5021.

[0054] Specifically, in one embodiment, a plurality of second bolts 505 are spaced apart on the outer periphery of the support base 502, and a plurality of strip-shaped sliding holes 5011 are provided on the outer periphery of the drive cylinder 501. The plurality of second bolts 505 are correspondingly disposed within the plurality of strip-shaped sliding holes 5011, and the second bolts 505 slide in contact with the corresponding strip-shaped sliding holes 5011 to limit the relative sliding position between the drive cylinder 501 and the support base 502. This limits the upward movement of the drive cylinder 501, preventing damage caused by continued thrust applied to the drive ring 4 when the drive cylinder 501 pushes it to a preset position. It also prevents the drive cylinder 501 from detaching from the support base 502, thereby reducing the risk of on-site operations.

[0055] Specifically, in one embodiment, a third bolt 506 is provided at the connection between the support base 502 and the base plate 503, and the third bolt 506 is used to fix the support base 502 to the base plate 503.

[0056] Specifically, in one embodiment, a through hole 5031 is provided at the center line of the base plate 503. The through hole 5031 is used to reduce the weight of the base plate 503. This saves materials and also facilitates on-site assembly of the tool.

[0057] Specifically, in one embodiment, the pre-harvest isolation sleeve mechanical accessory tool 500 further includes a locking mechanism. The locking mechanism is disposed on the outer periphery of the end of the drive cylinder 501 that contacts the drive ring 4, and is used to engage in the annular groove 41 on the drive ring 4. The pre-harvest isolation sleeve mechanical accessory tool 500 is configured such that the drive cylinder 501 can drive the drive ring 4 to slide along a first direction away from the pre-harvest isolation sleeve 200, so that the locking ring 3 retracts to the initial state.

[0058] Specifically, in one embodiment, a plurality of telescopic holes are spaced apart on the outer periphery of the drive cylinder 501, and the locking mechanism includes a plurality of locking blocks 507. The plurality of locking blocks 507 are telescopically arranged in the plurality of telescopic holes in a corresponding manner along the second direction, wherein the plurality of locking blocks 507 can simultaneously extend into the annular groove 41.

[0059] It should be noted that after the locking block 507 extends into the annular slot 41, when the drive cylinder 501 moves downward, the locking block 507 can drive the drive ring 4 of the tree isolation sleeve 200 away from the locking ring 3, thereby unlocking the tree isolation sleeve 200.

[0060] Specifically, in one embodiment, the end of the drive cylinder 501 that contacts the drive ring 4 has multiple limiting screw holes extending along the first direction. These limiting screw holes are connected one-to-one with multiple telescopic holes. The oil well isolation sleeve mechanical accessory tool 500 also includes multiple fourth bolts 508, which are screwed into the limiting screw holes one-to-one. The locking block 507 has an annular limiting groove on its outer periphery. The fourth bolts 508 extend into the corresponding annular limiting groove of the locking block 507 to limit the sliding position of the locking block 507 in the second direction. This avoids interference between the locking block 507 and the drive ring 4 when the drive cylinder 501 pushes the drive ring 4 to move.

[0061] Specifically, in one embodiment, the drive cylinder 501 has a plurality of threaded holes spaced apart at one end near the base plate 503, and the base plate 503 has a plurality of connecting holes spaced apart, with each connecting hole corresponding to one of the threaded holes. The pre-harvest tree isolation sleeve mechanical accessory tool 500 also includes a plurality of fifth bolts 509, which are screwed into the threaded holes one by one. Tightening the fifth bolts 509 in the pre-harvest tree isolation sleeve mechanical accessory tool 500 can drive the drive ring 4 to slide away from the pre-harvest tree isolation sleeve 200 along a first direction, causing the locking ring 3 to retract to its initial state. This achieves the unlocking function of the pre-harvest tree isolation sleeve mechanical accessory tool 500 on the pre-harvest tree isolation sleeve 200. Therefore, the pre-harvest tree isolation sleeve mechanical accessory tool 500 has the function of removing the pre-harvest tree isolation sleeve 200 from the pre-harvest tree body 100.

[0062] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A mechanical makeup tool for a Christmas tree isolation sleeve, characterized in that, The oil tree isolation sleeve mechanical matching tool comprises: a driving cylinder for pushing a driving ring of an oil tree isolation sleeve to slide along a first direction towards a locking ring of the oil tree isolation sleeve; and a support seat for supporting the driving cylinder and the oil tree isolation sleeve, the support seat being in sliding connection with the driving cylinder in the first direction; and a bottom plate fixed at a bottom end of the support seat; wherein a plurality of threaded connection holes are arranged on the bottom plate along the first direction, and a plurality of first bolts are arranged in the threaded connection holes one by one, and the oil tree isolation sleeve mechanical matching tool is configured to rotate the first bolts, one end of each of the first bolts being in contact with the driving cylinder and pushing the driving cylinder and the driving ring to slide along the first direction towards the locking ring of the oil tree isolation sleeve to expand the locking ring.

2. The mechanical makeup tool for the Christmas tree isolation sleeve according to claim 1, characterized in that, A hanging step is arranged in the support seat, and the oil tree isolation sleeve is placed on the hanging step.

3. The mechanical makeup tool for the Christmas tree isolation sleeve according to claim 1, characterized in that, A plurality of second bolts are arranged on the outer periphery of the support seat at intervals, and a plurality of strip-shaped sliding slot holes are arranged on the outer periphery of the driving cylinder, the second bolts being arranged in the strip-shaped sliding slot holes one by one, and the second bolts being in sliding fit with the strip-shaped sliding slot holes to limit the relative sliding position between the driving cylinder and the support seat.

4. The mechanical makeup tool for the isolation sleeve of the Christmas tree according to claim 1, characterized in that, A third bolt is arranged at the connection between the support seat and the bottom plate, and the third bolt is used to fix the support seat on the bottom plate.

5. The mechanical makeup tool for the isolation sleeve of the Christmas tree according to claim 1, characterized in that, A through hole is arranged at the center line position of the bottom plate, and the through hole is used to reduce the weight of the bottom plate.

6. The mechanical makeup tool for the isolation sleeve of the Christmas tree according to claim 1, characterized in that, The oil tree isolation sleeve mechanical matching tool further comprises a locking mechanism arranged on the outer periphery of one end of the driving cylinder in contact with the driving ring, and the locking mechanism is used to be clamped into an annular clamping groove on the driving ring, wherein the driving cylinder can drive the driving ring to slide along the first direction away from the oil tree isolation sleeve, so that the locking ring is retracted to the initial state.

7. The mechanical makeup tool for the Christmas tree isolation sleeve according to claim 6, characterized in that, A plurality of telescopic holes are arranged on the outer periphery of the driving cylinder at intervals, and the locking mechanism comprises a plurality of locking blocks, the locking blocks being arranged in the telescopic holes one by one in the second direction, wherein the locking blocks can be simultaneously inserted into the annular clamping groove.

8. The mechanical makeup tool for the Christmas tree isolation sleeve according to claim 7, characterized in that, A plurality of limiting screw holes are arranged on one end of the driving cylinder in contact with the driving ring along the first direction, the limiting screw holes being in communication with the telescopic holes one by one, and the oil tree isolation sleeve mechanical matching tool further comprises a plurality of fourth bolts, the fourth bolts being screwed in the limiting screw holes one by one, wherein an annular limiting groove is arranged on the outer periphery of the locking block, and the fourth bolt is inserted into the annular limiting groove of the corresponding locking block to limit the sliding position of the locking block in the second direction.

9. The mechanical makeup tool for the Christmas tree isolation sleeve according to claim 8, characterized in that, The driving cylinder is provided with a plurality of connecting threaded holes at one end close to the bottom plate, the bottom plate is provided with a plurality of communication holes at intervals, the plurality of communication holes are provided one by one corresponding to the plurality of connecting threaded holes, the mechanical matching tool of the Christmas tree isolation sleeve further comprises a plurality of fifth bolts, and the plurality of fifth bolts are screwed into the plurality of connecting threaded holes one by one, wherein the mechanical matching tool of the Christmas tree isolation sleeve screws the plurality of fifth bolts to drive the driving ring to slide in the first direction away from the Christmas tree isolation sleeve, so that the locking ring is retracted to the initial state.

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