CN215057127U - Offset correcting tool for petroleum development drilling and workover rig - Google Patents
Offset correcting tool for petroleum development drilling and workover rig Download PDFInfo
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- CN215057127U CN215057127U CN202121287061.2U CN202121287061U CN215057127U CN 215057127 U CN215057127 U CN 215057127U CN 202121287061 U CN202121287061 U CN 202121287061U CN 215057127 U CN215057127 U CN 215057127U
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Abstract
The utility model discloses a frock that oil development bores offset correction for workover rig, including returning the shape loading board, the below of returning the shape loading board is equipped with back the shape base, and the left side activity of returning the shape base has clamped supplementary slope seat, and the top of supplementary slope seat sets up to the inclined plane, the bottom front side and the bottom rear side of returning the shape loading board all nestification have a plurality of support balls, it is provided with and returns shape loading board matched with multidirectional displacement guiding mechanism of quick detach formula on the shape base to return, the multidirectional displacement guiding mechanism of quick detach formula is including setting up the rectangle box in returning the shape base. The utility model relates to a rationally, be convenient for to the quick displacement adjustment of a plurality of directions about the drilling and workover rig, through the mode of a plurality of directions adjustments about, can adjust the drilling and workover rig fast when the skew and correct, improve and correct precision and efficiency, and be convenient for to supplementary slope seat, shape loading board and shape base of returning and tear open the group, convenient follow-up transportation to this device split is favorable to using.
Description
Technical Field
The utility model relates to a technical field is corrected in the brill workover rig skew, especially relates to a frock that oil development brill workover rig was corrected with skew.
Background
The workover rig or the tractor hoist is the most basic and main power source in workover and underground operation construction, and is divided into two forms of a crawler type and a tire type according to the operation structure; the vehicle-mounted type and the self-propelled type are classified according to the walking chassis.
The existing workover rig is in place at a well site of the workover rig and is difficult to center, the phenomenon of deviation to a certain side often occurs, a driver needs to move the workover rig for many times to correct the deviation, the moving mode is difficult to correct quickly, the accuracy is low, the deviation correcting efficiency is low, and the using requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and the frock of correcting is bored in oil development workover rig with skew that proposes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a frock that oil development drilling and workover rig was corrected with skew, includes back the shape loading board, the below of returning the shape loading board is equipped with back the shape base, and the left side activity of returning the shape base clamps has supplementary slope seat, and the top of supplementary slope seat sets up to the inclined plane, the bottom front side and the bottom rear side of returning the shape loading board all nestification have a plurality of support balls, be provided with on returning the shape base and return the multidirectional displacement adjustment mechanism of shape loading board matched with quick detach formula.
Preferably, the quick-release multidirectional displacement adjusting mechanism comprises a rectangular box arranged in a square-shaped base, a rectangular clamping sleeve is fixedly connected between the inner wall of the front side and the inner wall of the rear side of the square-shaped bearing plate, a moving seat is slidably mounted on the inner wall of the bottom of the rectangular box, the top of the moving seat extends into the square-shaped bearing plate and is in movable contact with the bottom of the rectangular clamping sleeve, a rectangular clamping block is fixed at the top of the moving seat, the rectangular clamping sleeve is movably clamped on the rectangular clamping block, the top of the right side of the rectangular clamping block is provided with an inclined plane, the right side of the rectangular clamping block is provided with a rectangular clamping groove with openings on the front side and the rear side, a clamping rod is movably clamped in the rectangular clamping groove, the left side of the clamping rod is provided with an inclined section, the inclined section on the clamping rod is matched with the inclined plane on the rectangular clamping block, the right end of the clamping rod extends out of the rectangular clamping sleeve and is fixedly connected with a pull ring, and a rectangular groove is formed at the top of the clamping rod, a positioning rod is fixedly connected between the inner walls of the two sides of the rectangular groove, a fixing sleeve is slidably sleeved on the positioning rod and fixedly mounted with the rectangular cutting sleeve, a spring is fixedly connected between the left side of the fixing sleeve and the inner wall of the left side of the rectangular groove, and the spring is movably sleeved on the positioning rod;
the utility model discloses a rectangle box, including rectangle box, first electric telescopic handle, two guide bars of the equal fixedly connected with in both sides of rectangle box, the slide sleeve of shape base is established on four guide bars, and the shape base is gone back to inlay on the right side inner wall of shape base and is equipped with second electric telescopic handle, and the right side top fixed connection of the end that stretches out and rectangle box of second electric telescopic handle.
Preferably, two first clamping grooves are formed in the left side of the square-shaped base, two clamping columns are fixedly connected to the right side of the auxiliary slope seat, and the clamping columns are clamped with the corresponding first clamping grooves.
Preferably, a rectangular hole is formed in the inner wall of the right side of the rectangular clamping sleeve, the inner wall of the rectangular hole is in sliding connection with the outer side of the clamping rod, and the inner wall of the top of the rectangular hole is fixedly connected with the top of the fixing sleeve.
Preferably, the slope and slant of the inclined cross section on the clamping rod and the slope on the rectangular clamping block are the same.
Preferably, fixedly connected with T shape slide rail on the bottom inner wall of rectangle box, the T shape spout that front side and rear side are the opening setting is seted up to the bottom of removal seat, T shape spout and T shape slide rail sliding connection.
Preferably, two circular grooves are formed in the inner walls of the two sides of the square-shaped base, and the inner walls of the circular grooves are in sliding connection with the outer sides of the corresponding guide rods.
Preferably, an embedded groove is formed in the inner wall of the right side of the square base, and the inner wall of the embedded groove is fixedly connected with the outer side of the second electric telescopic rod.
Preferably, a circular through hole is formed in the inner wall of the front side of the rectangular box, and the extending end of the first electric telescopic rod is located in the circular through hole and is not in contact with the inner wall of the circular through hole.
Compared with the prior art, the beneficial effects of the utility model are that:
the auxiliary slope seat of the drilling and workover rig diameter is driven to move to the square bearing plate by a driver through the square bearing plate, the square base, the auxiliary slope seat, the clamping column, the supporting balls, the rectangular box, the guide rods, the moving seat, the first electric telescopic rod, the rectangular clamping sleeve, the rectangular clamping block, the rectangular clamping groove, the clamping rod, the rectangular groove, the positioning rod, the fixing sleeve, the spring, the second electric telescopic rod and the pull ring which are matched with the T-shaped slide rail, the rectangular box drives the auxiliary slope seat of the drilling and workover rig diameter to move to the square bearing plate, when the deviation occurs and the position needs to be adjusted for centering, the second electric telescopic rod is started to drive the rectangular box to move left and right, the rectangular box drives the four guide rods to respectively slide in the corresponding circular grooves, the rectangular box sequentially drives the square bearing plate to move left and right through the T-shaped slide rail, the moving seat, the rectangular clamping block and the rectangular clamping sleeve, the square bearing plate drives the plurality of supporting balls to roll left and right in the square base, and right of the drilling and left adjustment, when the front-back direction adjustment is needed, the first electric telescopic rod is started to drive the moving seat to slide back and forth on the T-shaped slide rail, the moving seat sequentially drives the clip-shaped bearing plate to move back and forth through the rectangular clamping block and the rectangular clamping sleeve, the clip-shaped bearing plate drives the drilling and workover rig to move back and forth for adjustment, so that the drilling and workover rig can be adjusted in multiple directions from left to right, and the drilling and workover rig can be adjusted and corrected quickly during deviation in multiple directions from left to right, so that the correction accuracy and efficiency are improved;
when the device is needed to be disassembled and transported after subsequent use, the auxiliary slope seat is moved leftwards to drive the two clamping columns to be separated from the corresponding first clamping grooves leftwards respectively, the pull ring is pulled rightwards to drive the clamping rods to be separated from the rectangular clamping grooves rightwards, the clamping rods drive the positioning rods to slide rightwards in the fixed sleeves and compress the springs to release the clamping, the clip-shaped bearing plate is moved upwards to drive the rectangular clamping sleeves to be separated from the rectangular clamping blocks upwards, the disassembly is completed, the transportation is convenient, when the device is needed to be assembled and used, the clamping columns on the auxiliary slope seat are clamped into the corresponding first clamping grooves rightwards, the clip-shaped bearing plate is moved downwards to drive the rectangular clamping sleeves to be downwards clamped and sleeved on the rectangular clamping blocks, the inclined cross sections of the clamping rods are driven by the rectangular clamping sleeves to downwards extrude the inclined surfaces of the rectangular clamping blocks, the clamping rods move rightwards under extrusion force and compress the springs, when the clamping rods move downwards to be aligned with the rectangular clamping grooves, at the moment, the elastic force of the spring in the compressed state drives the clamping rod to rebound leftwards and be clamped into the rectangular clamping groove, and the assembly is completed.
The utility model relates to a rationally, be convenient for to the quick displacement adjustment of a plurality of directions about the drilling and workover rig, through the mode of a plurality of directions adjustments about, can adjust the drilling and workover rig fast when the skew and correct, improve and correct precision and efficiency, and be convenient for to supplementary slope seat, shape loading board and shape base of returning and tear open the group, convenient follow-up transportation to this device split is favorable to using.
Drawings
Fig. 1 is a schematic structural diagram of a tool for correcting offset for an oil development drilling and workover rig according to the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of part A of FIG. 2;
fig. 4 is the utility model provides a circle shape loading board, support ball and the rectangle cutting ferrule connecting piece of the frock that oil development drilling and workover rig was corrected with skew are from upward perspective structure schematic diagram.
In the figure: 100 return shape loading boards, 101 return shape bases, 102 auxiliary slope seats, 1 clamping column, 2 supporting balls, 3 rectangular boxes, 4 guide rods, 5 moving seats, 6 first electric telescopic rods, 7 rectangular clamping sleeves, 8 rectangular clamping blocks, 9 rectangular clamping grooves, 10 clamping rods, 11 rectangular grooves, 12 positioning rods, 13 fixing sleeves, 14 springs, 15 second electric telescopic rods, 16 pull rings and 17T-shaped sliding rails.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, the offset correcting tool for the petroleum development well drilling and repairing machine comprises a square-shaped bearing plate 100, a square-shaped base 101 is arranged below the square-shaped bearing plate 100, an auxiliary slope seat 102 is movably clamped on the left side of the square-shaped base 101, the top of the auxiliary slope seat 102 is provided with an inclined surface, a plurality of supporting balls 2 are nested on the front side and the rear side of the bottom of the square-shaped bearing plate 100, and a quick-release type multidirectional displacement adjusting mechanism matched with the square-shaped bearing plate 100 is arranged on the square-shaped base 101;
the quick-dismantling type multidirectional displacement adjusting mechanism comprises a rectangular box 3 arranged in a square-shaped base 101, a rectangular clamping sleeve 7 is fixedly connected between the front side inner wall and the rear side inner wall of a square-shaped bearing plate 100, a moving seat 5 is slidably mounted on the bottom inner wall of the rectangular box 3, the top of the moving seat 5 extends into the square-shaped bearing plate 100 and is in movable contact with the bottom of the rectangular clamping sleeve 7, a rectangular clamping block 8 is fixed at the top of the moving seat 5, the rectangular clamping sleeve 7 is movably clamped on the rectangular clamping block 8, the top of the right side of the rectangular clamping block 8 is provided with an inclined plane, a rectangular clamping groove 9 with an opening at the front side and the rear side is formed in the right side of the rectangular clamping block 8, a clamping rod 10 is movably clamped in the rectangular clamping groove 9, the left side of the clamping rod 10 is provided with an inclined section, the inclined section on the clamping rod 10 is matched with the inclined plane on the rectangular clamping block 8, the right end of the clamping rod 10 extends out of the rectangular pull ring 7 and is fixedly connected with a pull ring 16, the top of the clamping rod 10 is provided with a rectangular groove 11, a positioning rod 12 is fixedly connected between the inner walls of the two sides of the rectangular groove 11, a fixing sleeve 13 is slidably sleeved on the positioning rod 12, the fixing sleeve 13 and the rectangular clamping sleeve 7 are fixedly installed, a spring 14 is fixedly connected between the left side of the fixing sleeve 13 and the inner wall of the left side of the rectangular groove 11, and the spring 14 is movably sleeved on the positioning rod 12;
the utility model has the advantages of reasonable design, convenient adjustment of the multi-direction quick displacement of the drilling and repairing well machine in the left and right and the front and the back, fast adjustment and correction of the drilling and repairing well machine in the deviation process by the multi-direction adjustment of the left and the back, improved correction precision and efficiency, convenient disassembly and assembly of the auxiliary slope seat 102, the back bearing plate 100 and the back base 101, convenient follow-up disassembly and transportation of the device, is beneficial to use.
In the utility model, two first clamping grooves are arranged on the left side of the clip-shaped base 101, two clamping posts 1 are fixedly connected on the right side of the auxiliary slope seat 102, the clamping posts 1 are clamped with the corresponding first clamping grooves, a rectangular hole is arranged on the right side inner wall of the rectangular clamping sleeve 7, the inner wall of the rectangular hole is in sliding connection with the outer side of the clamping rod 10, the top inner wall of the rectangular hole is fixedly connected with the top of the fixed sleeve 13, the inclined section of the clamping rod 10 is the same with the slope and slant of the inclined plane on the rectangular clamping block 8, a T-shaped slide rail 17 is fixedly connected with the bottom inner wall of the rectangular box 3, the bottom of the movable seat 5 is provided with a T-shaped slide groove with the front side and the rear side both being open, the T-shaped slide rail is in sliding connection with the T-shaped slide rail 17, two circular grooves are arranged on the inner walls on the two sides of the clip-shaped base 101, the inner walls of the circular grooves are in sliding connection with the outer sides of the corresponding guide rods 4, a groove is arranged on the right side inner wall of the clip-shaped base 101, and the inner wall of inlay groove and the outside fixed connection of second electric telescopic handle 15, offered the circle perforation on the front side inner wall of rectangle box 3, the end that stretches out of first electric telescopic handle 6 is located the circle perforation and contactless with the fenestrate inner wall of circle, the utility model relates to a rationally, be convenient for to the quick displacement adjustment of a plurality of directions around the rig, through the mode of a plurality of directions adjustment around controlling, can adjust and correct the rig fast when the skew, improve and correct precision and efficiency, and be convenient for tear open and organize supplementary slope seat 102, shape loading board 100 and shape base 101 back, make things convenient for follow-up transportation to this device split, be favorable to using.
The working principle is as follows: when the device is used, the device is arranged at one side of a well site position needing well repair, a driver drives the auxiliary slope seat 102 of the drilling and repairing machine diameter to the clip-shaped bearing plate 100, when the auxiliary slope seat deviates from the well repair position and needs to be adjusted, and when the auxiliary slope seat deviates towards the left side and needs to be adjusted towards the right side, the second electric telescopic rod 15 is reversely started, the extending end of the second electric telescopic rod 15 drives the rectangular box 3 to move towards the right, the rectangular box 3 drives the four guide rods 4 to respectively slide towards the right in the corresponding circular grooves, the rectangular box 3 drives the movable seat 5 to move towards the right through the T-shaped slide rail 17, the movable seat 5 drives the rectangular clamping sleeve 7 to move towards the right through the rectangular clamping sleeve 8, the rectangular clamping sleeve 7 drives the clip-shaped bearing plate 100 to move towards the right, the clip-shaped bearing plate 100 drives the plurality of supporting balls 2 to roll towards the right in the clip-shaped base 101, and the clip-shaped bearing plate 100 drives the drilling and repairing machine to move towards the right for adjustment, when the left adjustment is needed, the second electric telescopic rod 15 is started in the forward direction, when the front and back direction adjustment is needed, the first electric telescopic rod 6 is started, the first electric telescopic rod 6 drives the moving seat 5 to slide back and forth on the T-shaped slide rail 17, the moving seat 5 drives the rectangular clamping sleeve 7 to move back and forth through the rectangular clamping block 8, the rectangular clamping sleeve 7 drives the clip-shaped bearing plate 100 to move back and forth, the clip-shaped bearing plate 100 drives the drilling and workover rig to move back and forth for adjustment, so that the left and right adjustment and the front and back adjustment can be carried out in multiple directions, the drilling and workover rig can be adjusted and corrected quickly during the deviation through the left and right adjustment and the front and back adjustment, and the correction accuracy and the efficiency are improved;
after the device is used subsequently, and after the drilling and workover rig is moved away, when the device needs to be disassembled and transported, the auxiliary slope seat 102 is firstly moved leftwards, the auxiliary slope seat 102 drives the two clamping columns 1 to be separated from the corresponding first clamping grooves leftwards respectively, at the moment, the pull ring 16 is pulled rightwards, the pull ring 16 drives the clamping rod 10 to be separated from the rectangular clamping groove 9 rightwards, the clamping rod 10 drives the positioning rod 12 to slide rightwards in the fixing sleeve 13 and compress the spring 14 to release clamping, at the moment, the clip-shaped bearing plate 100 is moved upwards to drive the rectangular clamping sleeve 7 to be separated upwards from the rectangular clamping block 8, the disassembly is completed, the auxiliary slope seat 102, the clip-shaped bearing plate 100 and the clip-shaped base 101 are conveniently disassembled, the subsequent transportation is convenient, when the device needs to be assembled and used, the clamping columns 1 on the auxiliary slope seat 102 are firstly clamped rightwards into the corresponding first clamping sleeves, then the clip-shaped bearing plate 100 is moved downwards to drive the rectangular clamping sleeve 7 to be downwards clamped on the rectangular clamping block 8, the rectangular clamping sleeve 7 drives the clamping rod 10 to move downwards, the inclined section of the clamping rod 10 extrudes the inclined surface of the rectangular clamping block 8 downwards, the clamping rod 10 moves rightwards and compresses the spring 14 under extrusion force, when the clamping rod 10 moves downwards to be aligned with the rectangular clamping groove 9, the elastic force of the spring 14 in a compression state drives the clamping rod 10 to rebound leftwards and be clamped into the rectangular clamping groove 9, clamping is achieved, and assembly is completed.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a frock that oil development drilling and workover rig was corrected with skew, includes back shape loading board (100), the below of returning shape loading board (100) is equipped with back shape base (101), and the left side activity of returning shape base (101) clamps has supplementary sloping seat (102), and the top of supplementary sloping seat (102) sets up to the inclined plane, its characterized in that, the bottom front side and the bottom rear side of returning shape loading board (100) all nestedly have a plurality of support ball (2), be provided with on returning shape base (101) and return shape loading board (100) matched with quick detach formula multidirectional displacement adjustment mechanism.
2. The offset correcting tool for the oil development drilling and workover rig according to claim 1, wherein the quick-release multidirectional displacement adjusting mechanism comprises a rectangular box (3) arranged in a square base (101), a rectangular clamping sleeve (7) is fixedly connected between the inner wall of the front side and the inner wall of the rear side of the square bearing plate (100), a movable base (5) is slidably mounted on the inner wall of the bottom of the rectangular box (3), the top of the movable base (5) extends into the square bearing plate (100) and is in movable contact with the bottom of the rectangular clamping sleeve (7), a rectangular clamping block (8) is fixed on the top of the movable base (5), the rectangular clamping sleeve (7) is movably clamped on the rectangular clamping block (8), the top of the right side of the rectangular clamping block (8) is arranged to be an inclined plane, and a rectangular clamping groove (9) with openings in the front side and the rear side is arranged on the right side of the rectangular clamping block (8), a clamping rod (10) is movably clamped in the rectangular clamping groove (9), the left side of the clamping rod (10) is set to be an inclined cross section, the inclined cross section on the clamping rod (10) is matched with an inclined plane on the rectangular clamping block (8), the right end of the clamping rod (10) extends out of the rectangular clamping sleeve (7) and is fixedly connected with a pull ring (16), a rectangular groove (11) is formed in the top of the clamping rod (10), a positioning rod (12) is fixedly connected between the inner walls of two sides of the rectangular groove (11), a fixing sleeve (13) is slidably sleeved on the positioning rod (12), the fixing sleeve (13) is fixedly installed with the rectangular clamping sleeve (7), a spring (14) is fixedly connected between the left side of the fixing sleeve (13) and the inner wall of the left side of the rectangular groove (11), and the spring (14) is movably sleeved on the positioning rod (12);
the utility model discloses a rectangle box, including rectangle box (3), the front side top fixed mounting of rectangle box (3) has first electric telescopic handle (6), and the end that stretches out of first electric telescopic handle (6) extend to in rectangle box (3) and with the front side fixed connection who removes seat (5), two guide bars (4) of the equal fixedly connected with in both sides of rectangle box (3), return shape base (101) slip cap and establish on four guide bars (4), it is equipped with second electric telescopic handle (15) to inlay on the right side inner wall of shape base (101) to return, and the right side top fixed connection that stretches out end and rectangle box (3) of second electric telescopic handle (15).
3. The offset correcting tool for the oil development drilling and workover rig according to claim 1, wherein two first clamping grooves are formed in the left side of the square base (101), two clamping columns (1) are fixedly connected to the right side of the auxiliary slope seat (102), and the clamping columns (1) are clamped with the corresponding first clamping grooves.
4. The offset correcting tool for the oil development drilling and workover rig according to claim 2, wherein a rectangular hole is formed in the right inner wall of the rectangular cutting sleeve (7), the inner wall of the rectangular hole is in sliding connection with the outer side of the clamping rod (10), and the top inner wall of the rectangular hole is fixedly connected with the top of the fixing sleeve (13).
5. The offset correcting tool for the oil development drilling and workover rig according to claim 2, wherein the inclined section on the clamping rod (10) and the inclined surface on the rectangular clamping block (8) have the same slope and inclination.
6. The offset correcting tool for the oil development drilling and workover rig according to claim 2, wherein a T-shaped slide rail (17) is fixedly connected to the inner wall of the bottom of the rectangular box (3), a T-shaped sliding groove with an opening on both the front side and the rear side is formed in the bottom of the movable seat (5), and the T-shaped sliding groove is slidably connected with the T-shaped slide rail (17).
7. The offset correcting tool for the oil development drilling and workover rig according to claim 2, wherein two circular grooves are formed in the inner walls of the two sides of the square base (101), and the inner walls of the circular grooves are in sliding connection with the outer sides of the corresponding guide rods (4).
8. The tool for correcting the offset for the oil development drilling and workover rig according to claim 2, wherein an embedded groove is formed in the inner wall of the right side of the square base (101), and the inner wall of the embedded groove is fixedly connected with the outer side of the second electric telescopic rod (15).
9. The tool for correcting the offset for the oil development drilling and workover rig according to claim 2, wherein a circular through hole is formed in the inner wall of the front side of the rectangular box (3), and the extending end of the first electric telescopic rod (6) is located in the circular through hole and is not in contact with the inner wall of the circular through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121287061.2U CN215057127U (en) | 2021-06-09 | 2021-06-09 | Offset correcting tool for petroleum development drilling and workover rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121287061.2U CN215057127U (en) | 2021-06-09 | 2021-06-09 | Offset correcting tool for petroleum development drilling and workover rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215057127U true CN215057127U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121287061.2U Expired - Fee Related CN215057127U (en) | 2021-06-09 | 2021-06-09 | Offset correcting tool for petroleum development drilling and workover rig |
Country Status (1)
| Country | Link |
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| CN (1) | CN215057127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117868683A (en) * | 2023-12-19 | 2024-04-12 | 浙江省电力建设有限公司 | Directional drilling correction device, equipment and construction method for natural gas submarine pipeline |
-
2021
- 2021-06-09 CN CN202121287061.2U patent/CN215057127U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117868683A (en) * | 2023-12-19 | 2024-04-12 | 浙江省电力建设有限公司 | Directional drilling correction device, equipment and construction method for natural gas submarine pipeline |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |