CN221074163U - Oil gas well sleeve pipe anchor - Google Patents
Oil gas well sleeve pipe anchor Download PDFInfo
- Publication number
- CN221074163U CN221074163U CN202323290984.5U CN202323290984U CN221074163U CN 221074163 U CN221074163 U CN 221074163U CN 202323290984 U CN202323290984 U CN 202323290984U CN 221074163 U CN221074163 U CN 221074163U
- Authority
- CN
- China
- Prior art keywords
- arm
- gas well
- wall
- anchor
- oil
- 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
- 238000004873 anchoring Methods 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 7
- 241001330002 Bambuseae Species 0.000 claims abstract description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 7
- 239000011425 bamboo Substances 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The utility model discloses an oil and gas well casing pipe anchoring device, which comprises an anchor tile (14) and a supporting cylinder (11), and is characterized in that: there is the cavity in the middle of support section of thick bamboo (11), motor combination (1) is installed to the upper end of cavity, install electromagnetic clutch (2) between motor combination (1) and ball pair (5), the lower extreme of ball pair (5) is connected through coupling mechanism with the upper end of flexible arm (12), the lower extreme of flexible arm (12) is connected with the upper end of support arm (15), anchor tile (14) are installed in the junction of flexible arm (12) and support arm (15), the lower extreme of support arm (15) is connected on support section of thick bamboo (11) through second connecting pin (16). The utility model has the advantages of convenient anchoring, high working efficiency, low cost and convenient use, and the anchoring of the anchor tiles is controlled by using an electric adjustment mode of the motor combination, so that the operation is simpler and more convenient.
Description
Technical Field
The utility model provides a device for anchoring a downhole instrument on the inner wall of a casing by adopting an electric adjustment mode, relates to the technical field of oil and gas field exploitation anchors, and relates to the technical field of perforation completion and production logging in oil and gas field exploitation.
Background
Completion perforation construction is an important means of current oil and gas exploitation, and cable transmission directional perforation technology is the development trend of directional perforation. The cable transmission directional perforation technology is a technology for integrating the functions of depth correction, gyroscopic orientation, automatic control of the orientation of a perforating gun under a well by a power device, layered starting control of perforating charges by a ground instruction and the like, and realizing multi-layer orientation perforation during one-time well descending. In the azimuth perforating process, the underground instrument string is required to be fixed on the inner wall of the casing, so that other instruments are prevented from rotating when the azimuth of the perforating gun is adjusted, and the azimuth accuracy is prevented from being influenced. The use of casing anchoring means is required to effect the securing of the tool string to the inner wall of the casing. Casing anchoring devices are also required in many production logs to secure downhole tools to the inside wall of the casing. The patent application number 201120464415.6 discloses a hydraulic anchor for an oilfield anchoring tubing string, after the hydraulic anchor is lowered to a preset position, pressurized liquid in the tubing pushes an upper cone and a lower cone to move inwards through a central tube, a slip anchoring sleeve is propped open, and the slip anchoring sleeve is locked by virtue of a clamp spring. After the underground operation is completed, the lifting pipe column is sheared off to unclamp the shear pins, so that the clamping can be released; the hydraulic anchor has large anchoring force; mechanical locking, the anchoring force is not influenced after pressure relief; and the lifting pipe column is released, so that the releasing is reliable. However, the liquid pressurizing mode used by the utility model is troublesome, the tightness of the liquid injection part needs to be ensured, the manufacturing requirement on the device is high, the manufacturing cost of the device is increased, the lifting pipe column needs to shear the unsealing shear pin, new shear pins need to be reassembled each time of use, the working efficiency is low, and the use is inconvenient; the hydraulic anchor requires pressurized fluid through tubing and is not suitable for use in cable perforation operations.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the oil and gas well casing pipe anchoring device, which aims to solve the problems of troublesome anchoring mode, low working efficiency, high cost and inconvenient use in the prior art and is suitable for cable perforation operation.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an oil gas well sleeve pipe anchor, includes anchor tile and support section of thick bamboo, there is the cavity in the middle of the support section of thick bamboo, and motor combination is installed to the upper end of cavity, installs electromagnetic clutch between motor combination and the ball pair, and the lower extreme of ball pair is connected through coupling mechanism with the upper end of flexible arm, and the lower extreme of flexible arm is connected with the upper end of support arm, and the anchor tile is installed to the junction of flexible arm and support arm, and the lower extreme of support arm is connected on the support section of thick bamboo through the second connecting pin.
The connecting mechanism comprises a sliding rod, a sliding seat and a first connecting pin, wherein the sliding rod is cylindrical, the inner wall of the sliding rod is fixed on the outer wall of the lower end of the ball screw assembly, the upper end of the sliding seat is provided with a groove, the lower end of the sliding rod is embedded and fixed in the groove at the upper end of the sliding seat, and the sliding seat is connected with the telescopic arm through the first connecting pin.
The inner wall of the cavity of the supporting cylinder is fixedly provided with a screw protecting cylinder, a bearing is fixed on the inner wall of the supporting cylinder at the upper end of the screw protecting cylinder, a ball screw pair is supported by the bearing, a cavity is formed between the screw protecting cylinder and the outer wall of the sliding rod, a sliding block is placed in the cavity, the sliding block is fixed at the upper end of the outer wall of the sliding rod, the sliding block is in sliding connection with the inner wall of the supporting cylinder, and a compression spring is arranged between the lower end of the sliding block and the end face of the lower end of the cavity.
The telescopic arm is connected with the supporting arm through a safety pin, and the anchor shoe is arranged on the safety pin.
The output shaft of the motor combination is connected with the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is connected with the ball screw pair.
The anchor tile, the telescopic arm and the supporting arm are connected to form a group of anchor mechanisms, and three groups of anchor mechanisms are uniformly distributed in the circumferential direction of the supporting cylinder.
The anchor tile is provided with transverse and vertical crossed friction stripes.
An anchoring method of an oil and gas well casing anchoring device, comprising the following steps: firstly, the electromagnetic clutch is powered on and then is attracted, the motor combination transmits torque to the ball screw pair through the electromagnetic clutch, the ball screw pair moves downwards along the direction of the supporting cylinder, the telescopic arm gradually expands along with the movement of the ball screw pair, the supporting arm gradually expands along with the telescopic arm, the anchor tile gradually approaches the sleeve wall along with the expansion of the telescopic arm and the supporting arm, and the anchor tile is anchored on the sleeve wall.
When the system fails and the motor combination cannot be adjusted to enable the ball screw pair to move upwards or downwards, the power supply of the electromagnetic clutch is cut off, linkage between the ball screw pair and the motor combination is cut off, the compression spring resets and rebounds to push the sliding block upwards, the sliding block drives the sliding rod upwards, the sliding rod drives the ball screw of the ball screw pair to rotate reversely and move upwards, the sliding seat also moves upwards along with the sliding rod, the sliding seat drives the telescopic arm to retract, and the anchor tile is unfolded and anchored along with the retraction of the telescopic arm.
When the system fails and the linkage between the ball screw pair and the motor combination cannot be cut off, the downhole instrument is lifted up, so that the safety pin is sheared off, and the anchoring state is relieved.
The beneficial effects of the utility model are as follows: the utility model has the advantages of convenient anchoring, high working efficiency, low cost and convenient use,
1) The anchoring of the anchor tile is controlled by using an electric adjustment mode of the motor combination, so that the operation is simpler and more convenient.
2) The expansion degree of the telescopic arm can be adjusted through the ball screw pair, and the telescopic arm is suitable for 5.5 'sleeves and 7' sleeves.
3) The anchor tile is provided with the transverse and vertical crossed friction stripes, so that the circumference rotation resistance and the axial anti-slip performance of the anchoring device can be enhanced, and the anchoring capability of the anchoring device is further enhanced.
4) The motor combination adopts a high Wen Dingzhi damping motor to be matched with a special reduction gearbox, and the telescopic arm can be self-locked after being opened in place.
5) The ball screw pair is adopted to convert the rotation moment output by the motor combination into axial thrust, and the rotation motion of the motor combination output shaft is converted into the linear motion of the sliding block, so that the telescopic arm is driven to do the connecting rod motion, and the retraction of the anchor tile is realized.
6) The electromagnetic clutch is adopted, and the electromagnetic clutch is only used as a connecting transmission part between the motor combination and the ball screw pair in the electrified suction state. And in the power-off separation state, the linkage between the ball screw pair and the motor combination is conveniently cut off.
7) When the motor combination fails or the system is powered off, the ball screw is driven to rotate reversely by using the reset axial force of the compression spring as power, and the telescopic arm is retracted, so that the safety protection effect is achieved.
8) The safety pin is arranged between the supporting arm and the telescopic arm, and when the system fails and the telescopic arm cannot be retracted by means of the motor and the rolling screw pair, the safety pin can be sheared off by lifting the downhole instrument, so that the anchoring state is relieved.
Drawings
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and examples.
FIG. 1 is a cross-sectional view of the present utility model;
In the figure, the motor is combined, the electromagnetic clutch is 2-, the bearing is 3-, the screw is 4-, the ball screw is 5-, the sliding block is 6-, the compression spring is 7-, the sliding rod is 8-, the sliding seat is 9-, the first connecting pin is 10-, the supporting cylinder is 11-, the telescopic arm is 12-, the safety pin is 13-, the anchor tile is 14-, the supporting arm is 15-and the second connecting pin is 16-.
Detailed Description
Example 1
The oil and gas well casing anchoring device according to fig. 1 comprises an anchor tile 14 and a supporting cylinder 11, wherein a cavity is formed in the middle of the supporting cylinder 11, a motor assembly 1 is installed at the upper end of the cavity, an electromagnetic clutch 2 is installed between the motor assembly 1 and a ball screw pair 5, the lower end of the ball screw pair 5 is connected with the upper end of a telescopic arm 12 through a connecting mechanism, the lower end of the telescopic arm 12 is connected with the upper end of a supporting arm 15, the anchor tile 14 is installed at the joint of the telescopic arm 12 and the supporting arm 15, and the lower end of the supporting arm 15 is connected to the supporting cylinder 11 through a second connecting pin 16.
The connecting mechanism comprises a sliding rod 8, a sliding seat 9 and a first connecting pin 10, wherein the sliding rod 8 is cylindrical, the inner wall of the sliding rod 8 is fixed on the outer wall of the lower end of the ball screw pair 5, the upper end of the sliding seat 9 is provided with a groove, the lower end of the sliding rod 8 is embedded and fixed in the groove at the upper end of the sliding seat 9, and the sliding seat 9 is connected with a telescopic arm 12 through the first connecting pin 10.
The inner wall of the cavity of the supporting cylinder 11 is fixedly provided with a screw protecting cylinder 4, a bearing 3 is fixed on the inner wall of the supporting cylinder 11 at the upper end of the screw protecting cylinder 4, a ball screw pair 5 is supported by the bearing 3, a cavity is formed between the screw protecting cylinder 4 and the outer wall of the sliding rod 8, a sliding block 6 is placed in the cavity, the sliding block 6 is fixed at the upper end of the outer wall of the sliding rod 8, the sliding block 6 is in sliding connection with the inner wall of the supporting cylinder 11, and a compression spring 7 is arranged between the lower end of the sliding block 6 and the end face of the lower end of the cavity.
The telescopic arm 12 is connected with the supporting arm 15 through the safety pin 13, and the anchor shoe 14 is arranged on the safety pin 13.
The output shaft of the motor combination 1 is connected with the input end of the electromagnetic clutch 2, and the output end of the electromagnetic clutch 2 is connected with the ball screw pair 5.
The anchor tile 14, the telescopic arm 12 and the supporting arm 15 are connected to form a group of anchor mechanisms, and three groups of anchor mechanisms are uniformly distributed in the circumferential direction of the supporting cylinder 11.
The anchor tile 14 has friction stripes crossing vertically and horizontally.
An anchoring method of an oil and gas well casing anchoring device, comprising the following steps: firstly, the electromagnetic clutch 2 is powered and then is attracted, the motor assembly 1 transmits torque to the ball screw pair 5 through the electromagnetic clutch 2, the ball screw pair 5 moves downwards along the direction of the supporting cylinder 11, the telescopic arm 12 gradually expands along with the movement of the ball screw pair 5, the supporting arm 15 gradually expands along with the expansion of the telescopic arm 12, the anchor shoe 14 gradually approaches the casing wall along with the expansion of the telescopic arm 12 and the supporting arm 15 until the anchor shoe 14 is anchored on the casing wall.
When the system fails and the motor assembly 1 cannot be adjusted to enable the ball screw assembly 5 to move upwards or downwards, the power supply of the electromagnetic clutch 2 is cut off, linkage between the ball screw assembly 5 and the motor assembly 1 is cut off, the compression spring 7 resets and rebounds to push the sliding block 6 upwards, the sliding block 6 drives the sliding rod 8 upwards, the sliding rod 8 drives the ball screw of the ball screw assembly 5 to rotate reversely and move upwards, the sliding seat 9 also moves upwards along with the sliding rod 8, the sliding seat 9 drives the telescopic arm 12 to retract, and the anchor tile 14 is unfolded and anchored along with the retraction of the telescopic arm 12.
When the system fails and the linkage between the ball screw assembly 5 and the motor assembly 1 cannot be cut off, the downhole tool is lifted up, and the safety pin 13 is sheared off, so that the anchoring state is released.
Example 2
The motor combination adopts a high Wen Dingzhi damping motor to be matched with a reduction gearbox.
With the oil and gas well casing anchoring device as shown in fig. 1, anchoring is performed in a 5.5' casing, firstly, a downhole instrument is placed at a preset depth of the casing, then the electromagnetic clutch 2 is powered, the electromagnetic clutch 2 is powered and then is attracted, the motor combination 1 transmits torque to the ball screw pair 5 through the electromagnetic clutch 2, the ball screw pair 5 moves downwards along the direction of the supporting cylinder 11, the telescopic arm 12 gradually expands along with the movement of the ball screw pair 5, and the anchor shoe 14 moves along with the telescopic arm 12 until the anchor shoe 14 is anchored on the casing wall.
When the operation is performed or the anchoring state of the anchor shoe 14 is required to be adjusted after the operation is completed, the motor combination is adjusted to enable the ball screw pair 5 to move upwards or downwards, and further the telescopic arm 12 is retracted and expanded, so that the anchoring state of the anchor shoe 14 is controlled.
When the system fails and the motor assembly 1 cannot be adjusted to enable the ball screw assembly 5 to move upwards or downwards, the power supply of the electromagnetic clutch 2 is cut off, linkage between the ball screw assembly 5 and the motor assembly 1 is cut off, the compression spring 7 resets and rebounds to push the sliding block 6 upwards, the sliding block 6 drives the sliding rod 8 upwards, the sliding rod 8 drives the ball screw of the ball screw assembly 5 to rotate reversely and move upwards, the sliding seat 9 also moves upwards along with the sliding rod 8, the sliding seat 9 drives the telescopic arm 12 to retract, and the anchor tile 14 is unfolded and anchored along with the retraction of the telescopic arm 12.
When the system fails and the linkage between the ball screw assembly 5 and the motor assembly 1 cannot be cut off, the downhole tool is lifted up, and the safety pin 13 is sheared off, so that the anchoring state is released.
Example 3
With the oil and gas well casing anchoring device as shown in fig. 1, anchoring is performed in a 7' casing, a downhole instrument is firstly put into the casing, then the electromagnetic clutch 2 is powered, the electromagnetic clutch 2 is powered and then is attracted, the motor combination 1 transmits torque to the ball screw pair 5 through the electromagnetic clutch 2, the ball screw pair 5 moves downwards along the direction of the supporting cylinder 11, the telescopic arm 12 gradually expands along with the movement of the ball screw pair 5, and the anchor shoe 14 moves along with the telescopic arm 12 until the anchor shoe 14 is anchored on the casing wall.
When the operation is performed or the anchoring state of the anchor shoe 14 is required to be adjusted after the operation is completed, the motor assembly 1 is adjusted to enable the ball screw pair 5 to move upwards or downwards, and further the telescopic arm 12 is retracted and expanded, so that the anchoring state of the anchor shoe 14 is controlled.
When the system fails and the motor assembly 1 cannot be adjusted to enable the ball screw assembly 5 to move upwards or downwards, the power supply of the electromagnetic clutch 2 is cut off, linkage between the ball screw assembly 5 and the motor assembly 1 is cut off, the compression spring 7 resets and rebounds to push the sliding block 6 upwards, the sliding block 6 drives the sliding rod 8 upwards, the sliding rod 8 drives the ball screw of the ball screw assembly 5 to rotate reversely and move upwards, the sliding seat 9 also moves upwards along with the sliding rod 8, the sliding seat 9 drives the telescopic arm 12 to retract, and the anchor tile 14 is unfolded and anchored along with the retraction of the telescopic arm 12.
When the system fails and the linkage between the ball screw assembly 5 and the motor assembly 1 cannot be cut off, the downhole tool is lifted up, and the safety pin 13 is sheared off, so that the anchoring state is released.
Claims (7)
1. An oil and gas well casing anchoring device comprises an anchor shoe (14) and a supporting cylinder (11), and is characterized in that: there is the cavity in the middle of support section of thick bamboo (11), motor combination (1) is installed to the upper end of cavity, install electromagnetic clutch (2) between motor combination (1) and ball pair (5), the lower extreme of ball pair (5) is connected through coupling mechanism with the upper end of flexible arm (12), the lower extreme of flexible arm (12) is connected with the upper end of support arm (15), anchor tile (14) are installed in the junction of flexible arm (12) and support arm (15), the lower extreme of support arm (15) is connected on support section of thick bamboo (11) through second connecting pin (16).
2. An oil and gas well casing anchoring device according to claim 1, wherein: the connecting mechanism comprises a sliding rod (8), a sliding seat (9) and a first connecting pin (10), wherein the sliding rod (8) is cylindrical, the inner wall of the sliding rod (8) is fixed on the outer wall of the lower end of the ball screw pair (5), the upper end of the sliding seat (9) is provided with a groove, the lower end of the sliding rod (8) is embedded and fixed in the groove at the upper end of the sliding seat (9), and the sliding seat (9) is connected with the telescopic arm (12) through the first connecting pin (10).
3. An oil and gas well casing anchoring device according to claim 1, wherein: the cavity inner wall of a supporting cylinder (11) is fixedly provided with a screw protecting cylinder (4), a bearing (3) is fixed on the inner wall of the supporting cylinder (11) at the upper end of the screw protecting cylinder (4), a ball screw pair (5) is supported by the bearing (3), a cavity is formed between the screw protecting cylinder (4) and the outer wall of a sliding rod (8), a sliding block (6) is placed in the cavity, the sliding block (6) is fixed at the upper end of the outer wall of the sliding rod (8), the sliding block (6) is in sliding connection with the inner wall of the supporting cylinder (11), and a compression spring (7) is arranged between the lower end of the sliding block (6) and the end face of the lower end of the cavity.
4. An oil and gas well casing anchoring device according to claim 1, wherein: the telescopic arm (12) is connected with the supporting arm (15) through the safety pin (13), and the anchor shoe (14) is arranged on the safety pin (13).
5. An oil and gas well casing anchoring device according to claim 1, wherein: the output shaft of the motor combination (1) is connected with the input end of the electromagnetic clutch (2), and the output end of the electromagnetic clutch (2) is connected with the ball screw pair (5).
6. An oil and gas well casing anchoring device according to claim 1, wherein: a group of anchoring mechanisms is formed by connecting an anchor tile (14), a telescopic arm (12) and a supporting arm (15), and three groups of anchoring mechanisms are uniformly distributed in the circumferential direction of the supporting cylinder (11).
7. An oil and gas well casing anchoring device according to claim 1, wherein: the anchor tile (14) is provided with transverse and vertical crossed friction stripes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323290984.5U CN221074163U (en) | 2023-12-04 | 2023-12-04 | Oil gas well sleeve pipe anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323290984.5U CN221074163U (en) | 2023-12-04 | 2023-12-04 | Oil gas well sleeve pipe anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074163U true CN221074163U (en) | 2024-06-04 |
Family
ID=91260436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323290984.5U Active CN221074163U (en) | 2023-12-04 | 2023-12-04 | Oil gas well sleeve pipe anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074163U (en) |
-
2023
- 2023-12-04 CN CN202323290984.5U patent/CN221074163U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109267982B (en) | Staged fracturing and water control well completion method, tubular column and underground sliding sleeve switch system | |
| US20240254837A1 (en) | Coiled tubing flexible drill rod ultra-short radius radial drilling string, system and method | |
| CN102943637A (en) | Device for clamping a pipe on a drilling rig | |
| CA2810098A1 (en) | Expandable casing patch | |
| CN103277049B (en) | Slip type whipstock | |
| CN104453717A (en) | Long auger drilling and bottom expanding device and expanded anchor rod construction method | |
| WO2023197948A1 (en) | Positioning and orientating apparatus for branch well, and positioning and orientating method | |
| CN111119784A (en) | Suspension plugging device for open hole well and use method | |
| CN109763784B (en) | Split bridge plug hydraulic setting tool and setting method thereof | |
| CN115977564B (en) | Automatically controlled well drilling safety release instrument | |
| CN205000943U (en) | But anchor tile modus ponens casing packer | |
| CN111852385A (en) | A automatically controlled packer of repeatedly setting deblocking for test of oil gas well layering section | |
| CN107091058B (en) | Hydraulic control starting telescopic pipe capable of transmitting torque | |
| CN221074163U (en) | Oil gas well sleeve pipe anchor | |
| CN108179991B (en) | Bridge plug capable of being salvaged after fracturing | |
| CN117365344A (en) | Oil-gas well casing pipe anchoring device and method | |
| CN218780327U (en) | Oil pipe pressurized operation equipment with hydraulic control pipe | |
| CN219101298U (en) | Degradable expansion rubber plug for oil pipe | |
| CN111963103A (en) | Bridge plug convenient for mounting anchoring device | |
| CN203374205U (en) | Slip type whipstock | |
| CN212803147U (en) | A automatically controlled packer of repeatedly setting deblocking for test of oil gas well layering section | |
| CN202900113U (en) | Down-hole in-pipe support device | |
| CN110965951B (en) | Large-drift-diameter hydraulic anchor and use method thereof | |
| CN113803018A (en) | Extension hanger capable of achieving tie-back | |
| CN113969760A (en) | Electric channeling-checking leakage-finding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |