CN221096465U - Hydraulically driven type underwater wellhead installation tool - Google Patents
Hydraulically driven type underwater wellhead installation tool Download PDFInfo
- Publication number
- CN221096465U CN221096465U CN202323282533.7U CN202323282533U CN221096465U CN 221096465 U CN221096465 U CN 221096465U CN 202323282533 U CN202323282533 U CN 202323282533U CN 221096465 U CN221096465 U CN 221096465U
- Authority
- CN
- China
- Prior art keywords
- locking
- driving cylinder
- underwater wellhead
- installation tool
- central shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000000670 limiting effect Effects 0.000 claims description 21
- 230000009471 action Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a hydraulic drive type underwater wellhead installation tool, which relates to the field of marine drilling operation tools and comprises a central shaft, a worm gear mechanism, a piston mechanism, a locking mechanism and an anti-rotation mechanism. According to the underwater wellhead installation tool provided by the utility model, the rotation motion of the central shaft can be converted into the linear motion of the driving cylinder along the axial direction by utilizing the cooperation of the central shaft, the driving cylinder and the anti-rotation pin; the utility model has the advantages that the structure parts are few, the installation is easy, the construction steps are few, and the rotation center shaft is used for releasing the underwater wellhead installation tool from the underwater wellhead after the underwater wellhead is put in place.
Description
Technical Field
The utility model relates to the field of marine drilling operation tools, in particular to a hydraulic drive type underwater wellhead installation tool.
Background
Along with the success of twice natural gas hydrate test production in China, the industrialization process of the natural gas hydrate is accelerated, the natural gas hydrate in the sea area and deep water oil gas have the same points, an underwater wellhead is required to be used as a channel for communicating a platform and a reservoir, and how to quickly, efficiently and reliably install the underwater wellhead is a basic work for implementing drilling, completion and test production.
Because of the influence of the deepwater environment, the installation of the underwater wellhead cannot be operated manually and directly, the underwater wellhead is connected with a special installation tool through a drill rod to be sent into the seabed, the underwater wellhead is connected with a suction anchor or a catheter head and is released through the combination of operation modes such as rotation, suspension weight release, lifting and lowering, and then the installation tool returns to a drilling platform to carry out the next construction operation.
The installation tool is connected with the underwater wellhead, the splash zone and the sitting-hanging-releasing stage, the load born by each working section is different, the installation tool bears the floating weight of the lower sleeve, the sea water wind wave load and the pulling force of the upper pipe string in the use process, the stress environment is complex, and the risk of tool damage or installation failure is extremely high.
Disclosure of utility model
Based on the above, the utility model aims to provide a hydraulic drive type underwater wellhead installation tool so as to solve the technical problem that the underwater wellhead installation tool is extremely high in risk of tool damage or installation failure in the using process.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the hydraulic drive type underwater wellhead installation tool comprises a central shaft, a worm gear mechanism, a piston mechanism, a locking mechanism and an anti-rotation mechanism, wherein the worm gear mechanism comprises a central shaft, a cam driving cylinder and a driving cylinder lock pin; the piston mechanism comprises a cam driving cylinder, a central shaft, a shell and a piston base; the locking bearing mechanism comprises a shell, a locking chuck, a piston base and a bearing ring, the upper end and the lower end of a central shaft are used for connecting a drill rod, and a cam driving cylinder is used for changing rotary motion into linear motion and simultaneously provides a mechanical limiting and locking function; the locking mechanism is used for providing hydraulic pressure or negative pressure, pushing the locking chuck to be embedded into or separated from the locking groove of the underwater wellhead, and connecting or locking the installation tool with the underwater wellhead; the locking chuck rebounds by utilizing the negative pressure of the piston cavity.
The anti-rotation mechanism further comprises a flange part, a driving cylinder lock pin and an anti-rotation pin, wherein the flange part is sleeved on the central shaft, the driving cylinder lock pin is used for penetrating through the flange part and the underwater wellhead along the axial direction, the anti-rotation pin is penetrating through the flange part and the cam driving cylinder along the axial direction, the driving cylinder lock pin is used for limiting rotation between the cam driving cylinder and the shell, and rotation between the shell and the underwater wellhead is limited by the anti-rotation pin.
The utility model is further arranged that the central shaft is provided with a bearing ring for bearing the weight of the shell, the piston base and the external underwater wellhead, and simultaneously the axial displacement of the shell and the piston base is limited.
The utility model is further arranged that the piston mechanism generates pressure change by changing the volume of the piston, the piston pressure pushes the locking chuck to extend out of the shell, hydraulic pressure is continuously provided when the locking chuck is locked when the piston mechanism descends to the bottom, and the hydraulic locking function is provided by the action of incompressible fluid.
The utility model further provides that when the locking chuck is locked, the cam driving cylinder continues to move downwards, the outer wall of the cam driving cylinder abuts against the tail part of the locking chuck, and the locking chuck is prevented from rebounding through mechanical limiting, so that a mechanical locking function is provided.
The utility model is further characterized in that a locking protrusion is formed on the outer wall of the locking chuck and is used for being matched with a locking groove of the underwater wellhead, and the locking chuck and the bearing ring are provided with limiting springs which are used for applying resilience force when the locking chuck returns to the original position, so that the locking chuck is further ensured to return to the original position.
The utility model is further arranged such that the subsea wellhead installation tool further comprises a status indication rod.
In summary, the utility model has the following advantages:
According to the underwater wellhead installation tool provided by the utility model, the rotation motion of the central shaft can be converted into the linear motion of the driving cylinder along the axial direction by utilizing the cooperation of the central shaft, the driving cylinder and the anti-rotation pin; the utility model has the advantages that the structure parts are few, the installation is easy, the construction steps are few, and the rotation center shaft is used for releasing the underwater wellhead installation tool from the underwater wellhead after the underwater wellhead is put in place.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the installation tool of the present utility model in a locked position with an underwater wellhead;
FIG. 3 is a schematic view of the installation tool of the present utility model in a disengaged state with an underwater wellhead.
In the figure: 1. a central shaft; 2. a status indication lever; 3. a screw; 4. a limiting disc; 5. a cam driving cylinder; 6. a housing; 7. locking the chuck; 8. a piston base; 9. a carrier ring; 10. a drive cylinder lock pin; 11. an anti-rotation pin; 20. and (3) an underwater wellhead.
Description of the embodiments
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.
As shown in fig. 1-3, the present embodiment provides a hydraulic driving and mechanical locking type underwater wellhead installation tool, which comprises a central shaft, a piston mechanism, a locking mechanism, a worm gear mechanism and an anti-rotation mechanism, wherein a cam driving cylinder 5 and a bearing ring 9 are both sleeved on the central shaft 1, the cam driving cylinder 5 is in threaded connection with the central shaft 1, and a driving cylinder lock pin 10 of the anti-rotation mechanism is used for preventing the cam driving cylinder 5 from rotating around the central shaft 1; when the central shaft 1 is rotated, the cam driving cylinder 5 can move up and down in a straight line, a piston is formed in a closed space formed by the central shaft 1, the cam driving cylinder 5, the locking chuck 7 and the shell 6, and when the cam driving cylinder 5 moves in a straight line, the volume of the piston and the pressure of closed liquid in the piston can be changed; the locking clamp 7 stretches out or retracts under the action of pressure difference at two ends of the locking clamp, when the piston pressure is increased, the locking clamp 7 stretches out, and when the piston pressure is reduced, the locking clamp retracts; the locking clamp can be locked in the underwater wellhead 20 when extending out, and the locking clamp 7 is separated from the underwater wellhead 20 when retracting; the central shaft 1 is preferably a hollow shaft, threads are respectively arranged at two ends of the central shaft 1, the two ends of the central shaft 1 can be connected with other parts through the threads arranged on the central shaft, and fluid is allowed to move inside; the form of the threads on the central shaft 1 and the cam driving cylinder 5 is not particularly limited, and the rotation motion of the central shaft 1 can be converted into the linear motion of the cam driving cylinder 5, but as a specific implementation manner, in this embodiment, a T-shaped left-handed thread is arranged on the outer wall of the central shaft 1, and a T-shaped left-handed thread matched with the T-shaped left-handed thread is formed on the inner side of the cam driving cylinder 5; the sealing form of the piston mechanism is not particularly limited, and only the piston liquid is ensured not to leak.
According to the underwater wellhead installation tool provided by the embodiment, the rotation motion of the central shaft 1 can be converted into the linear motion of the cam driving cylinder 5 along the axial direction by utilizing the cooperation of the central shaft 1, the cam driving cylinder 5 and the anti-rotation structure, and when the cam driving cylinder 5 makes the linear motion, the connection and the disconnection of the underwater wellhead installation tool and the underwater wellhead 20 are realized by utilizing the piston pressure. The embodiment has the advantages of simple structure principle, fewer parts, easy installation and operation, and can drive the central shaft 1 to rotate after the underwater wellhead 20 is put in place, so that the underwater wellhead installation tool is disengaged from the underwater wellhead 20, and the performance is more reliable.
Based on the above structure, in this embodiment, the central shaft 1 is connected with the cam driving cylinder 5 by left-handed threads, and the threads at both ends of the central shaft 1 are right-handed threads; when the right-hand tube column is released, the central shaft 1 drives the cam driving cylinder 5 to move upwards, and the connection between the central shaft 1 and the lower tube column is not released.
On the basis of the above structure, in this embodiment, the anti-rotation structure includes the driving cylinder lock pin 10 and the anti-rotation pin 11, the driving cylinder lock pin 10 is used for limiting the rotation between the cam driving cylinder 5 and the housing 6, the housing 6 and the underwater wellhead 20 are limited by the anti-rotation pin 11, the rotation of the driving cylinder lock pin 10 and the cam driving cylinder 5 is not limited specifically, the arrangement can be performed according to specific needs, the two connected components can be prevented from generating relative rotation, the flange part is sleeved on the underwater wellhead 20, the driving cylinder lock pin 10 and the anti-rotation pin 11 are installed respectively, the structure is simple, the installation is convenient, and after the underwater wellhead 20 is put in place, the flange part is easy to separate from the underwater wellhead 20, and the performance is more reliable.
In order to prevent the whole parts such as the flange part, the cam driving cylinder 5 and the like from moving along the axial direction during the rotation of the central shaft 1 and affecting the sealing effect, in the embodiment, the lower end of the flange part is abutted to the shaft shoulder of the central shaft 1, and the central shaft 1 is provided with an axial limiting structure abutted to the upper end of the flange part; preferably, the axial limiting structure is a clamping ring sleeved on the central shaft 1, and a groove for accommodating the clamping ring is formed in the outer wall of the central shaft 1.
In order to prevent the problem that the locking chuck cannot be aligned with the locking groove of the underwater wellhead during the installation process, a limiting disc 4 is arranged for guiding the alignment; when the installation tool enters the underwater wellhead 20, the locking chuck 7 is aligned with the locking groove of the underwater wellhead 20 when the lower end face of the limiting disc 4 is contacted with the upper end face of the underwater wellhead 20.
On the basis of the structure, the anti-rotation pin 11 is provided with an elastic telescopic function, and the installation tool is in a retracted state when entering the underwater wellhead 20; when the installation tool rotates in the underwater wellhead 20, the anti-rotation pin 11 is aligned with the key slot in the underwater wellhead 20 and then ejects the installation tool shell to enter the key slot in the inner wall of the underwater wellhead 20.
In order to further improve the tightness of the locking clamp 7 in cooperation with the underwater wellhead 20, the cam driving cylinder 5 is externally provided with a guiding conical surface for providing a mechanical limiting effect for the locking clamp 7; when the locking chuck 7 is extended, the guide conical surface synchronously descends to tightly cling to the locking chuck, the end part of the locking chuck 7 is subjected to the mechanical limiting effect of the guide conical surface except the action of piston pressure, and when the locking chuck is completely extended, the maximum outer diameter of the cam driving cylinder 5 descends to the locking chuck 7.
On the basis of the above structure, when the cam driving cylinder 5 is up, the piston chamber volume increases and the pressure decreases. The pressure difference between the two end faces of the locking clamp 7 withdraws the locking clamp 7 from the locking groove of the underwater wellhead 20.
In order to clearly indicate the locking/unlocking state of the underwater wellhead installation tool, the underwater entrance tool further comprises a state indication rod 2, wherein the state indication rod 2 is preferably arranged on the flange in a penetrating manner, more specifically, the lower end of the state indication rod 2 is arranged at the upper end of the cam driving cylinder 5, the lower end of the state indication rod 2 is provided with a shaft shoulder, the shaft shoulder is sleeved with a compression spring, the upper end of the state indication rod penetrates through and protrudes out of the flange, and the state indication rod 2 is not connected with the cam driving cylinder 5.
The present embodiment also provides a subsea wellhead assembly comprising a subsea wellhead 20 and the above subsea wellhead installation tool.
The underwater wellhead assembly provided by the embodiment has the advantages that due to the adoption of the underwater wellhead mounting tool, the principle is simple, parts are few, the installation and the operation are easy, the underwater wellhead mounting tool can be connected with or disconnected from the underwater wellhead 20 through the rotation center shaft 1, the operation actions are few, and the performance is more reliable.
The working principle of the utility model is as follows:
The assembly process comprises the following steps: mounting the locking clamp 7 in the concave hole of the shell 6; the cam driving cylinder 5 is screwed on the outer thread of the central shaft 1, and the shell 6 and the piston base 8 are sleeved below the central shaft 1; the bearing ring 9 is sleeved in a groove of the central shaft 1, and the shell 6 is connected with the piston base 8 through threads; penetrating the state indicating rod 2 into a through hole of a sealing flange plate, connecting the sealing flange plate with a limiting plate 4, sleeving the sealing flange plate with the limiting plate 4 from above the center, aligning threaded holes of the sealing flange plate, the limiting plate 4 and a shell 6, fixing the sealing flange plate, the limiting plate 4 and the shell 6 by using a screw 3, and tightly attaching the bottom of the state indicating rod to the top end of a cam driving cylinder under the action of a spring; the anti-rotation pin 11 is mounted in a keyway of the housing 6.
The working process comprises the following steps: installing an underwater wellhead installation tool according to the assembly process, wherein the upper end of the underwater wellhead installation tool is connected with a drill rod; lifting the underwater wellhead installation tool to the position above the underwater wellhead 20, slowly placing the underwater wellhead 20, at the moment, withdrawing the anti-rotation pin 11 into the key groove under the elastic action, and stopping the underwater wellhead installation tool when the bottom end of the limit disc 4 abuts against the upper end surface of the underwater wellhead 20; the left-hand central shaft 1, the central shaft 1 drives the cam driving cylinder 5 to move downwards, the cam driving cylinder 5 moves downwards to reduce the volume of the piston and increase the pressure, the locking chuck 7 stretches outwards under the action of the piston pressure to bite into the groove of the underwater wellhead 20, and the state indicating rod 2 moves downwards synchronously in the descending process of the cam driving cylinder 5; lifting the central shaft 1, observing lifting load, confirming the locking state of the locking chuck 7 and the underwater wellhead 20 until the complete locking is confirmed, and recording lifting load data; lowering an underwater wellhead installation tool and an underwater wellhead 20 to a seabed mud line through a drill string, recording lifting load data, and cementing well cementation; releasing the weight of the underwater wellhead, observing the difference between the load data of the drill string and the data of the load data of the two times, determining the position of a neutral point of the drill string at the underwater wellhead mounting tool, rotating the drill string to the right, driving the central shaft 1 to rotate to the right by the drill string, pushing the cam driving cylinder 5 to move upwards, increasing the volume of the piston cavity, reducing the pressure, and withdrawing the locking chuck under the action of the pressure difference of the hydrostatic pressure of the seabed and the piston pressure, so as to be separated from the groove of the underwater wellhead 20; and lifting the drill string, and driving the underwater wellhead installation tool to be separated from the underwater wellhead 20 by the drill string to complete the underwater wellhead 20 installation operation.
Although embodiments of the utility model have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the utility model as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the utility model, provided that such modifications are within the scope of the appended claims.
Claims (7)
1. The hydraulic drive type underwater wellhead installation tool is characterized by comprising a central shaft (1), a worm and gear mechanism, a piston mechanism, a locking mechanism and an anti-rotation mechanism, wherein the worm and gear mechanism comprises the central shaft (1), a cam driving cylinder (5) and a driving cylinder lock pin (10); the piston mechanism comprises a cam driving cylinder (5), a central shaft (1), a shell (6) and a piston base (8); the locking bearing mechanism comprises a shell (6), a locking chuck (7), a piston base (8) and a bearing ring (9), wherein the upper end and the lower end of a central shaft (1) are used for connecting a drill rod, and a cam driving cylinder (5) is used for changing rotary motion into linear motion and simultaneously provides a mechanical limiting and locking function; the locking mechanism is used for providing hydraulic pressure or negative pressure, pushing the locking chuck (7) to be embedded into or separated from the locking groove of the underwater wellhead, and connecting or locking the installation tool with the underwater wellhead; the locking chuck (7) uses the negative pressure rebound of the piston cavity.
2. A hydraulically driven subsea wellhead installation tool according to claim 1, wherein: the anti-rotation mechanism comprises a flange part, a driving cylinder lock pin (10) and an anti-rotation pin (11), wherein the flange part is sleeved on the central shaft (1), the driving cylinder lock pin (10) is used for penetrating through the flange part and the underwater wellhead (20) along the axial direction, the anti-rotation pin (11) penetrates through the flange part and the cam driving cylinder (5) along the axial direction, the driving cylinder lock pin (10) is used for limiting rotation between the cam driving cylinder (5) and the shell (6), and rotation is limited between the shell (6) and the underwater wellhead (20) through the anti-rotation pin (11).
3. A hydraulically driven subsea wellhead installation tool according to claim 1, wherein: the central shaft (1) is provided with a bearing ring (9) for bearing the weight of the shell (6), the piston base (8) and the external underwater wellhead (20), and simultaneously, the axial displacement of the shell (6) and the piston base (8) is limited.
4. A hydraulically driven subsea wellhead installation tool according to claim 1, wherein: the piston mechanism generates pressure change by changing the volume of the piston, the piston pressure pushes the locking chuck (7) to extend out of the shell (6), when the piston mechanism descends to the bottom, the locking chuck (7) continuously provides hydraulic pressure during locking, and the hydraulic locking function is provided through the action of incompressible fluid.
5. A hydraulically driven subsea wellhead installation tool according to claim 4, wherein: when the locking chuck (7) is locked, the cam driving cylinder (5) continues to move downwards, the outer wall abuts against the tail of the locking chuck (7), the locking chuck (7) is prevented from rebounding through mechanical limiting, and a mechanical locking function is provided.
6. A hydraulically driven subsea wellhead installation tool according to claim 1, wherein: the outer wall of the locking chuck (7) is provided with a locking protrusion which is used for being matched with a locking groove of the underwater wellhead (20).
7. A hydraulically driven subsea wellhead installation tool according to claim 1, wherein: the underwater wellhead installation tool further comprises a status indication rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323282533.7U CN221096465U (en) | 2023-12-04 | 2023-12-04 | Hydraulically driven type underwater wellhead installation tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323282533.7U CN221096465U (en) | 2023-12-04 | 2023-12-04 | Hydraulically driven type underwater wellhead installation tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221096465U true CN221096465U (en) | 2024-06-07 |
Family
ID=91310092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323282533.7U Active CN221096465U (en) | 2023-12-04 | 2023-12-04 | Hydraulically driven type underwater wellhead installation tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221096465U (en) |
-
2023
- 2023-12-04 CN CN202323282533.7U patent/CN221096465U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019205479A1 (en) | Casing head and annulus sealing device running tool for deepwater drilling, and method for using same | |
| US4185856A (en) | Pipe joint with remotely operable latch | |
| CN112627755A (en) | Lifting drilling type large-diameter well bottom in-situ pressure maintaining coring drilling tool | |
| CN110593777B (en) | Double-gradient drilling string disconnecting and tieback device without marine riser | |
| CN112324371A (en) | Tool for feeding and recovering tubing hanger of underwater Christmas tree | |
| NO345206B1 (en) | System and procedure for high pressure, high temperature feedback | |
| CN221096465U (en) | Hydraulically driven type underwater wellhead installation tool | |
| CN112112588A (en) | Press-in type rope coring drilling tool and coring process method thereof | |
| CN116752925A (en) | Corrosion-resistant cap for underwater wellhead | |
| CN214273581U (en) | Lifting drilling type large-diameter well bottom in-situ pressure maintaining coring drilling tool | |
| CN113006695B (en) | PDC drill bit pulse impact device and method | |
| CN111894478B (en) | RD type safety joint | |
| CN208564436U (en) | It is a kind of with the conductor housing running tool for continuing drilling function | |
| CN113107436A (en) | Underground self-locking safety valve for deep-sea natural gas hydrate double-layer pipe exploitation | |
| CA3033949C (en) | Combined casing and drill-pipe fill-up, flow-back and circulation tool | |
| CN221322347U (en) | Underwater wellhead metal sealing device for synchronous implementation of sealing and locking | |
| CN111980618B (en) | Well head connector with emergency mechanical unlocking function | |
| CN111337283B (en) | Function test experimental device and method for deepwater surface conduit feeding tool | |
| CN213511140U (en) | Hard sealing rod type oil well pump and special pipe pump connecting, sealing and fixing device | |
| CN218177197U (en) | Can salvage and exempt from to bore cementing well device | |
| CN115162989B (en) | Lifting drilling type pressure maintaining coring drilling tool | |
| CN217106909U (en) | Hydraulic and mechanical combined underwater wellhead feeding tool for ocean deep water | |
| CN115142811B (en) | Non-rotary repeatable setting packer and setting and unsetting methods thereof | |
| US11891871B1 (en) | Mechanical hanger running tool with fluid bearing system and method | |
| CN208672314U (en) | Operation testing tool for boll-weevil hanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |