CN111827913A - Well drilling operation unfreezing device - Google Patents
Well drilling operation unfreezing device Download PDFInfo
- Publication number
- CN111827913A CN111827913A CN201910307033.3A CN201910307033A CN111827913A CN 111827913 A CN111827913 A CN 111827913A CN 201910307033 A CN201910307033 A CN 201910307033A CN 111827913 A CN111827913 A CN 111827913A
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- China
- Prior art keywords
- upper joint
- torque
- lower joint
- joint
- key groove
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
Abstract
The invention provides a stuck freeing device for drilling operation, comprising: the upper joint is of a cylindrical structure, the middle part of the upper joint is provided with pin holes and liquid discharge holes which are arranged at intervals in the radial direction, and the inner wall of one end of the upper joint is provided with an upper joint key groove; the lower joint is of a cylindrical structure, one end of the lower joint is connected with the outer wall of one end of the upper joint, a lower joint key groove is formed in the middle of the lower joint, and the upper joint key groove and the lower joint key groove are correspondingly and fixedly connected; the torque-bearing mandrel can be arranged in the upper joint and the lower joint in a sliding mode, a pin groove corresponding to the pin hole is formed in one end of the torque-bearing mandrel, an outer convex key is arranged at the other end of the torque-bearing mandrel, and the outer convex key can be connected with the upper joint key groove and the lower joint key groove in a matched mode. The hydraulic unfreezing device has the advantages that unfreezing can be carried out through hydraulic power, the situation that the unfreezing cannot be effectively carried out by a conventional unfreezing means is avoided, and borehole collapse or borehole scrapping cannot be caused.
Description
Technical Field
The invention relates to the field of petroleum and natural gas drilling and completion, in particular to a stuck releasing device for drilling operation.
Background
The stuck drill is an accident frequently occurred in the drilling operation, and the stuck drill mainly comprises falling objects, adhesion, collapse, sand bridge, necking and the like. The conventional stuck drill processing method comprises stuck freeing means such as soaking, explosion and the like. The well tracks of deep wells and ultra-deep wells are irregular, the stratum is complex, and the risk of drill sticking is high during drilling operation. As deep wells and ultra-deep wells have well depth and are complicated underground, the conventional unfreezing means cannot effectively unfreeze the borehole, and the borehole is easily collapsed by soaking unfreezing and explosion unfreezing, so that the borehole is scrapped.
Disclosure of Invention
The invention provides a stuck releasing device for drilling operation, which aims to achieve the purpose of releasing a pipe column from stuck releasing.
The technical scheme adopted by the invention for solving the technical problems is as follows: a drilling operation stuck freeing apparatus comprising: the upper joint is of a cylindrical structure, the middle part of the upper joint is provided with pin holes and liquid discharge holes which are arranged at intervals in the radial direction, and the inner wall of one end of the upper joint is provided with an upper joint key groove; the lower joint is of a cylindrical structure, one end of the lower joint is connected with the outer wall of one end of the upper joint, a lower joint key groove is formed in the middle of the lower joint, and the upper joint key groove and the lower joint key groove are correspondingly and fixedly connected; the torque-bearing mandrel can be arranged in the upper joint and the lower joint in a sliding mode, a pin groove corresponding to the pin hole is formed in one end of the torque-bearing mandrel, an outer convex key is arranged at the other end of the torque-bearing mandrel, and the outer convex key can be connected with the upper joint key groove and the lower joint key groove in a matched mode.
Furthermore, the number of the convex keys is multiple, the convex keys are symmetrically arranged at the other end of the torque-bearing mandrel, and the number of the upper joint key grooves and the number of the lower joint key grooves correspond to the number of the convex keys.
Furthermore, the torque-bearing mandrel is provided with an assembling position and a releasing position, when in the assembling position, the outer convex key is matched and connected with the upper joint key groove and the lower joint key groove, and one end of the torque-bearing mandrel can block the liquid discharge hole; when the position of unfreezing, the convex key is connected with the lower joint key groove in a matching mode, and two ends of the liquid discharge hole are respectively communicated with the inside and the outside of the upper joint.
Further, when in the assembling position, a shearing pin is arranged in the pin hole and is connected with the pin groove.
Furthermore, a sealing groove is formed in the outer surface of one end of the torque bearing mandrel, and a sealing ring for sealing is arranged in the sealing groove.
Further, the number of the sealing grooves is at least two, and in the assembling position, the pin hole and the liquid discharge hole are located between the at least two sealing grooves.
Further, the end face of one end of the torque bearing mandrel is provided with a conical matching part used for matching with the plugging ball.
Further, one end of the lower joint is in threaded connection with the outer wall of one end of the upper joint.
Further, the other end of the lower joint is provided with a connecting thread.
Furthermore, the pin hole is a threaded hole, and the liquid discharge hole is a unthreaded hole.
The hydraulic unfreezing device has the advantages that unfreezing can be carried out through hydraulic power, the situation that the unfreezing cannot be effectively carried out by a conventional unfreezing means is avoided, and borehole collapse or borehole scrapping cannot be caused.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of an embodiment of the present invention in an assembled position;
fig. 2 is a schematic structural diagram of the embodiment of the present invention in the jam release position.
Reference numbers in the figures: 1. an upper joint; 3. shearing the pin; 4. a torque-receiving mandrel; 5. a lower joint; 6. plugging the ball; 11. a pin hole; 12. a drain hole; 13. an upper joint keyway; 41. a pin slot; 42. a male key; 43. a sealing groove; 51. lower joint keyway.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 2, the embodiment of the invention provides a well drilling operation unfreezing device, which comprises an upper joint 1, a lower joint 5 and a torque-bearing mandrel 4. The upper joint 1 is of a cylindrical structure, the middle of the upper joint 1 is provided with pin holes 11 and liquid discharge holes 12 which are arranged at intervals in the radial direction, and the inner wall of one end of the upper joint 1 is provided with an upper joint key groove 13. The lower joint 5 is a cylindrical structure, one end of the lower joint 5 is connected with the outer wall of one end of the upper joint 1, a lower joint key groove 51 is arranged in the middle of the lower joint 5, and the upper joint key groove 13 corresponds to and is connected with the lower joint key groove 51. The torque bearing mandrel 4 is provided with a central through hole, the torque bearing mandrel 4 can be slidably arranged in the upper joint 1 and the lower joint 5, one end of the torque bearing mandrel 4 is provided with a pin groove 41 corresponding to the pin hole 11 (a shearing pin 3 is arranged in the pin hole 11, and the shearing pin 3 is connected with the pin groove 41), the other end of the torque bearing mandrel 4 is provided with an outer convex key 42, and the outer convex key 42 can be matched and connected with the upper joint key groove 13 and the lower joint key groove 51.
The embodiment of the invention can be unlocked through water power, and the phenomenon that the conventional unlocking means cannot be used for effectively unlocking the well and the collapse of the well hole or the abandonment of the well hole cannot be caused is avoided.
The pin hole 11 is a screw hole, and the drain hole 12 is a smooth hole. One end of the shearing pin 3 is provided with a thread and is in threaded connection with the pin hole 11; one end of the pin is in a cylindrical structure and is in clearance fit with the pin groove 41 on the outer surface of the torque-bearing mandrel 4.
Furthermore, the torque-bearing mandrel 4 is of a cylindrical structure, the outer surface of the torque-bearing mandrel 4 is a stepped shaft joint, one end of the torque-bearing mandrel 4 is a cylinder with a larger outer diameter, and a pin groove 41 is processed on the surface of the torque-bearing mandrel 4; the other end of the torque-bearing mandrel 4 is a small-diameter cylinder, and an outer convex key 42 is processed on the outer surface.
Preferably, the number of the male keys 42 is plural, and the male keys are symmetrically arranged at the other end of the torque receiving mandrel 4, and the number of the upper joint key grooves 13 and the number of the lower joint key grooves 51 correspond to the number of the male keys 42. In the embodiment of the present invention, there are two outward protruding keys 42, and the number of the upper joint key slots 13 and the lower joint key slots 51 is two, and the positions of the two outward protruding keys correspond to the positions of the outward protruding keys 42.
As shown in fig. 1 and 2, the torque receiving mandrel 4 has an assembly position and an unlocking position:
in the assembling position, the convex key 42 is matched and connected with the upper joint key groove 13 and the lower joint key groove 51, and one end of the torque bearing mandrel 4 can block the liquid discharge hole 12.
In the unlocking position, the male key 42 is engaged with the lower joint key groove 51, and both ends of the liquid discharge hole 12 communicate with the inside and outside of the upper joint 1, respectively.
The embodiment of the invention can be connected to the upper end of a power drill, and when in an assembling position, the torque-bearing mandrel 4 is simultaneously connected with the corresponding upper joint key groove 13 and the lower joint key groove 51 in the upper joint 1 and the lower joint 5 through the outer convex key 42, so that the threads of the left-handed threads at the connecting part in the upper joint 1 and the lower joint 5 are not loosened in the drilling operation process.
When a drill sticking accident occurs, a blocking ball 6 is put into the inner part of the embodiment of the invention, and the blocking ball 6 blocks the central through hole of the torque-bearing mandrel 4 and forms water hole pressure building. When the pressure rises to a certain value, the torque bearing mandrel 4 shears the shear pin 3 and moves downwards, the convex key 42 of the torque bearing mandrel 4 is separated from the upper joint key groove 13, the torque of the upper joint 1 and the lower joint 5 is relieved, the liquid discharge hole 12 is opened, the pressure drops suddenly, and the pump is stopped. And simultaneously, the drill stem is rotated clockwise, and the left-handed thread is loosened. And (4) lifting the pipe column to drop the hanging weight and then tripping the drill to realize releasing the stuck pipe.
Preferably, the outer surface of one end of the torque receiving mandrel 4 is provided with a sealing groove 43, and a sealing ring for sealing is arranged in the sealing groove 43. The number of the seal grooves 43 is at least two, and the pin hole 11 and the drain hole 12 are located between the at least two seal grooves 43 in the assembled position. The sealing rings are used for sealing the pin hole 11 and the drain hole 12.
Further, one end of the lower joint 5 is in threaded connection with the outer wall of one end of the upper joint 1. The other end of the lower joint 5 is provided with a connecting thread. The end face of one end of the torque bearing mandrel 4 is provided with a conical matching part used for matching with the plugging ball 6.
The upper joint 1 has a cylindrical structure and an outer diameter of 172 mm. One end of the upper joint 1 is provided with a reverse-rotation male thread which is in threaded connection with the lower joint 5. And a positive-rotation female thread is processed at the other end of the upper joint 1 and is in threaded connection with an upper drill string.
The lower joint 5 is of a cylindrical structure, the outer diameter of the lower joint is 172mm, and one end of the lower joint 5 is provided with a reverse-rotation female thread which is in threaded connection with the upper joint 1; the other end of the lower joint 5 is processed with a positive-rotation male thread and is in threaded connection with a lower drill string. The embodiment of the invention is suitable for the downhole power drill with opposite rotation directions to respectively drive the reamer and the pilot bit, and the reamer is not limited to a fixed wing reamer.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the embodiment of the invention can be unlocked through water power, and the phenomenon that the conventional unlocking means cannot be used for effectively unlocking the well and the collapse of the well hole or the abandonment of the well hole cannot be caused is avoided.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (10)
1. A drilling operation stuck freeing apparatus comprising:
the upper joint (1) is of a cylindrical structure, pin holes (11) and liquid discharge holes (12) which are radially arranged at intervals are formed in the middle of the upper joint (1), and an upper joint key groove (13) is formed in the inner wall of one end of the upper joint (1);
the lower joint (5) is of a cylindrical structure, one end of the lower joint (5) is connected with the outer wall of one end of the upper joint (1), a lower joint key groove (51) is formed in the middle of the lower joint (5), and the upper joint key groove (13) is corresponding to and connected with the lower joint key groove (51);
the torque-bearing mandrel (4) is arranged in the upper joint (1) and the lower joint (5) in a sliding mode, a pin groove (41) corresponding to the pin hole (11) is formed in one end of the torque-bearing mandrel (4), an outer convex key (42) is arranged at the other end of the torque-bearing mandrel (4), and the outer convex key (42) can be connected with the upper joint key groove (13) and the lower joint key groove (51) in a matched mode.
2. The well drilling operation unfreezing device according to claim 1, wherein the number of the convex keys (42) is multiple, the convex keys are symmetrically arranged at the other end of the torque-bearing mandrel (4), and the number of the upper joint key grooves (13) and the number of the lower joint key grooves (51) correspond to the number of the convex keys (42).
3. Drilling operation stuck freeing according to claim 1, characterised in that the torque-receiving mandrel (4) has an assembly position and a stuck freeing position,
when the assembly position is reached, the outer convex key (42) is matched and connected with the upper joint key groove (13) and the lower joint key groove (51), and one end of the torque-bearing mandrel (4) can block the liquid discharge hole (12);
and in the unlocking position, the outer convex key (42) is matched and connected with the lower connector key groove (51), and two ends of the liquid discharge hole (12) are respectively communicated with the inside and the outside of the upper connector (1).
4. Drilling operation stuck freeing apparatus according to claim 3, characterised in that in the assembled position, a shear pin is provided in the pin hole (11) and connected to the pin groove (41).
5. The well drilling operation unfreezing device of claim 3, wherein a sealing groove (43) is formed in the outer surface of one end of the torque-bearing mandrel (4), and a sealing ring for sealing is arranged in the sealing groove (43).
6. Drilling operation stuck freeing apparatus according to claim 5, characterised in that there are at least two sealing grooves (43), and in the assembled position the pin hole (11) and the drainage hole (12) are located between at least two sealing grooves (43).
7. Drilling operation unfreezing device according to claim 1, characterized in that the end face of one end of the torque receiving mandrel (4) is provided with a conical engagement portion for engagement with the plugging ball (6).
8. The well drilling unfreezing device of claim 1, wherein one end of the lower joint (5) is in threaded connection with the outer wall of one end of the upper joint (1).
9. Drilling operation stuck freeing according to claim 1, characterised in that the other end of the lower joint (5) is provided with a connecting thread.
10. Drilling trip device according to claim 1, characterized in that the pin hole (11) is a threaded hole and the drain hole (12) is a smooth hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307033.3A CN111827913A (en) | 2019-04-17 | 2019-04-17 | Well drilling operation unfreezing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307033.3A CN111827913A (en) | 2019-04-17 | 2019-04-17 | Well drilling operation unfreezing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111827913A true CN111827913A (en) | 2020-10-27 |
Family
ID=72915607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910307033.3A Pending CN111827913A (en) | 2019-04-17 | 2019-04-17 | Well drilling operation unfreezing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111827913A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB849283A (en) * | 1958-02-06 | 1960-09-21 | Kenneth Edward Waggener | Releasable safety joint for well strings |
| US4064953A (en) * | 1976-06-22 | 1977-12-27 | Gulf Oil Corporation | Shear sub for drill string |
| CN1061069A (en) * | 1990-09-27 | 1992-05-13 | 加利福尼亚联合石油公司 | Oil tool release joint |
| CN201212359Y (en) * | 2008-04-16 | 2009-03-25 | 青岛普瑞思德科技有限公司 | Hydraulic releasing mechanism |
| CN201212360Y (en) * | 2008-06-18 | 2009-03-25 | 北京华油油气技术开发有限公司 | Ring-releasing safety joint |
| CN203547574U (en) * | 2013-11-04 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | Safety joint of sliding sleeve |
| CN105221083A (en) * | 2015-09-22 | 2016-01-06 | 西南石油大学 | A kind of apparatus and method for reclaiming drill string in accident well |
| CN206309299U (en) * | 2016-11-22 | 2017-07-07 | 中国石油天然气股份有限公司 | A kind of safety joint |
-
2019
- 2019-04-17 CN CN201910307033.3A patent/CN111827913A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB849283A (en) * | 1958-02-06 | 1960-09-21 | Kenneth Edward Waggener | Releasable safety joint for well strings |
| US4064953A (en) * | 1976-06-22 | 1977-12-27 | Gulf Oil Corporation | Shear sub for drill string |
| CN1061069A (en) * | 1990-09-27 | 1992-05-13 | 加利福尼亚联合石油公司 | Oil tool release joint |
| CN201212359Y (en) * | 2008-04-16 | 2009-03-25 | 青岛普瑞思德科技有限公司 | Hydraulic releasing mechanism |
| CN201212360Y (en) * | 2008-06-18 | 2009-03-25 | 北京华油油气技术开发有限公司 | Ring-releasing safety joint |
| CN203547574U (en) * | 2013-11-04 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | Safety joint of sliding sleeve |
| CN105221083A (en) * | 2015-09-22 | 2016-01-06 | 西南石油大学 | A kind of apparatus and method for reclaiming drill string in accident well |
| CN206309299U (en) * | 2016-11-22 | 2017-07-07 | 中国石油天然气股份有限公司 | A kind of safety joint |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20201027 |