CN111119771B - Releasing device and drilling string comprising same - Google Patents
Releasing device and drilling string comprising same Download PDFInfo
- Publication number
- CN111119771B CN111119771B CN201811293585.5A CN201811293585A CN111119771B CN 111119771 B CN111119771 B CN 111119771B CN 201811293585 A CN201811293585 A CN 201811293585A CN 111119771 B CN111119771 B CN 111119771B
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- Prior art keywords
- joint
- wall
- upper joint
- sub
- sleeve
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- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a releasing device and a drilling string comprising the same. And the tooth joint assembly is arranged between the upper joint and the lower joint and is circumferentially arranged, wherein in a first working state, the lower joint is fixedly connected with the upper joint and acts on the tooth joint assembly, in a second working state, the lower joint is fixedly released from the upper joint and acts on the tooth joint assembly, the releasing device can be directly connected onto a drill rod, the drilling requirement is met, the releasing operation can be conveniently realized, and technical support is provided for the well drilling and completion integration of the lower drill rod serving as a lower well completion pipe column.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas, in particular to a releasing device and a drilling string comprising the same.
Background
With the development of the integrated drilling and completion process, after drilling is completed, the lower drill pipe is separated from the upper drill pipe, and the lower drill pipe may be placed downhole as a lower completion string. However, it is difficult to separate the lower drill rod from the upper drill rod during actual construction operations. Therefore, the invention provides a releasing device which can meet the drilling requirement and the releasing requirement and is used for the technical problem to be solved.
Disclosure of Invention
In view of some or all of the above technical problems in the prior art, the present invention provides a releasing device and a drilling string including the same. The releasing device can be directly connected to the drill rod, meets the drilling requirement, can conveniently realize releasing operation, and provides technical support for the integration of drilling and completion with the lower drill rod as a lower completion string.
According to a first aspect of the present invention, there is provided a releasing device comprising:
a cylindrical upper joint, a cylindrical lower joint and a cylindrical upper joint,
a cylindrical lower joint which is partially sleeved at the lower end of the upper joint,
a circumferentially arranged toothing assembly arranged between the upper joint and the lower joint,
wherein, under the first operating condition, the lower clutch is constructed as and is connected with top connection fixed connection, and the tooth joint subassembly effect, and under the second operating condition, the lower clutch is constructed as and is released fixedly with the top connection, and the tooth joint subassembly effect is invalid.
In one embodiment, the toothing assembly has:
a plurality of first teeth circumferentially spaced on the outer wall of the upper joint,
a plurality of second teeth arranged on the inner wall of the lower joint at intervals in the circumferential direction,
after the lower end of the upper joint is sleeved in an inner cavity at the upper end of the lower joint, the first teeth are meshed with the second teeth in a concave-convex matching manner.
In one embodiment, the ratio of the tooth height of each first tooth to the tooth base of each second tooth is 0.3 to 1.
In one embodiment, a locking assembly is provided between the upper joint and the lower joint at the overlap, the locking assembly comprising:
a locking block which is embedded into a groove arranged on the inner wall of the lower joint and radially penetrates through the wall of the upper joint,
a supporting sleeve used for limiting the locking block, the supporting sleeve is sleeved in the inner cavity of the upper joint,
a shear pin that enables the support sleeve to be selectively fixed relative to the upper sub.
In one embodiment, a ball seat is provided on the inner wall of the support sleeve.
In one embodiment, the locking assembly further comprises an inner sleeve disposed between the support sleeve and the upper joint, the inner sleeve being disposed in the inner cavity of the upper joint and having a lower end surface abutting on a first step surface disposed on an inner wall of the upper joint, the shear pin being disposed between the inner sleeve and the support sleeve.
In one embodiment, a resilient member is disposed between the bottom wall of the groove and the locking block.
In one embodiment, guide ramps are provided between the upper end surface and the outer wall surface and between the lower end surface and the outer wall surface of the locking block.
In one embodiment, a receiving basket is provided at the lower end of the upper sub for receiving the support sleeve.
According to a second aspect of the present invention, there is provided a drilling string comprising a lost device as described above.
Compared with the prior art, the invention has the advantages that the tooth joint assembly is arranged between the upper joint and the lower joint of the releasing device, and the releasing device can transmit large torque when arranged on a drill rod. In addition, under different working states, the upper joint and the lower joint can be selectively and fixedly connected or separated, so that the releasing operation is realized. Therefore, the releasing device can provide equipment support for the integrated process of drilling and completion.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows a releasing device according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view B-B from FIG. 1;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 shows a releasing device 100 according to the present invention. As shown in fig. 1, the releasing device 100 comprises an upper joint 1, a lower joint 2 and a tooth joint assembly. Wherein, the upper joint 1 is in a cylinder shape, and the upper end is used for being connected with a drill rod. The lower joint 2 is partially sleeved at the lower end of the upper joint 1 and is of a cylindrical structure, and the lower end of the lower joint is connected with a drill rod. The toothing assembly is arranged between the upper joint 1 and the lower joint 2 and is circumferentially arranged to define a relative circumferential movement therebetween. In the first operating condition, the lower coupling 2 is fixedly connected to the upper coupling 1, and at this time, the toothing assembly functions to enable the releasing device 100 to transmit a large torque without affecting the drilling construction operation. In the second operating condition, the lower sub 2 is axially separated from the upper sub 1 and the ratcheting assembly function is disabled, at which point the upper sub 1 can be lifted out of the wellbore while the lower sub 2 remains in the wellbore as part of the completion string. The structure enables the releasing device 100 to transmit large torque in the process of drilling, ensures the smooth implementation of drilling operation, can realize releasing operation, and provides equipment support for the integrated process of drilling and well completion.
In one embodiment, as shown in FIG. 2, the toothing assembly has a plurality of first teeth 11 and a plurality of second teeth 21. Wherein, a plurality of first teeth 11 are arranged on the outer wall of the upper joint 1 at intervals in the circumferential direction. And a plurality of second teeth 21 are circumferentially spaced on the inner wall of the lower joint 2. After the lower end of the upper joint 1 extends and is sleeved in the inner cavity of the lower joint 2, the first tooth 11 and the second tooth 21 can be engaged in a concave-convex matching manner. This cooperation limits the circumferential movement of the lower joint 2 and the upper joint 1, i.e. the lower joint 2 will follow the rotation of the upper joint 1 during drilling. The radial cross-sectional shape of the first tooth 11 may be triangular or trapezoidal. Preferably, the ratio of the tooth height dimension of each first tooth 11 to the dimension of the corresponding tooth base is 0.3-1, for example 0.5. Correspondingly, the tooth shape and the outer dimensions of the second tooth 21 match those of the first tooth 11. The arrangement can ensure the tooth joint strength between the upper joint 1 and the lower joint 2, thereby ensuring that the releasing device 100 can transmit huge drilling torque.
In one embodiment, the lower end of the upper connector 1 is inserted into the inner cavity of the lower connector 2 and extends downward. A locking assembly is provided between the upper joint 1 and the lower joint 2 for securing the upper joint 1 and the lower joint 2 during drilling and releasing the upper joint 1 and the lower joint 2 during the need of releasing so that the upper joint 1 can move relative to the lower joint 2.
The locking assembly comprises a locking block 3, a support sleeve 4, a shear pin 5 and an inner sleeve 6. Wherein the locking block 3 penetrates radially through the wall of the upper joint 1, partly fitting into a groove 22 provided on the inner wall of the lower joint 2. The locking block 3 plays a role of fixing the upper joint 1 and the lower joint 2, and meanwhile, the arrangement is beneficial to transmission of drilling torque to ensure the working safety of the releasing device 100. In order to ensure the fixation of the locking block 3, a support sleeve 4 is sleeved in the inner cavity of the upper joint 1 for limiting the radial displacement of the locking block 3, thereby ensuring the stable fixation position of the upper joint 1 and the lower joint 2. The inner sleeve 6 is disposed between the support sleeve 4 and the upper joint 1. A first step surface 12 is provided on the inner wall of the upper joint 1. The inner sleeve 6 is sleeved in the inner cavity of the upper joint 1, the lower end face of the inner sleeve abuts against the first step face 12, and the upper end face of the inner sleeve is abutted by the upper drill rod joint and is axially fixed. The shear pin 5 connects the inner sleeve 6 and the support sleeve 4 to define the position of the support sleeve 4 relative to the upper joint 1. The structure is simple and easy to install. Before releasing the hand, the position of the locking block 3 is defined by the interaction of the inner sleeve 6, the support sleeve 4 and the shear pin 5, thereby ensuring a fixed connection of the upper joint 1 and the lower joint 2. Under the action of external force, the shear pin 5 can be sheared so that the support sleeve 4 moves downwards. At this time, the locking piece 3 is unlocked, and when the upper joint 1 is lifted, the locking piece 3 can move radially inward, releasing the fixation of the upper joint 1 and the lower joint 2. And the upper joint 1 is continuously lifted, so that the upper joint 1 is separated from the lower joint 2, and the releasing operation is realized.
The shear pin 5 may be actuated to shear by hydraulic means. Specifically, a ball seat 7 is provided on an inner wall of the support sleeve 4. Preferably, the ball seat 7 may be configured as an arc-shaped concave surface provided between the inner wall and the upper end surface of the support sleeve 4. During the release, ball 200 is thrown from the surface into the drill pipe and ball 200 engages ball seat 7 during the fall, thereby sealing off the inner cavity of release device 100. At this point, pressure may be applied from the wellhead, increasing the pressure to eventually shear the shear pin 5. Thereafter, the support sleeve 4 and the ball 200 move down due to the loss of the confinement, thereby releasing the confinement of the lock block 3.
Preferably, an elastic member (not shown in the figures) is provided between the locking block 3 and the bottom wall of the groove 22. The elastic member may be a spring. The resilient member may be fixedly arranged on the outside of the locking block 3. After the locking block 3 is mounted, radial pressure is applied to the locking block 3 by the support sleeve 4, whereby the elastic member is compressed. After the support sleeve 4 moves downwards, the radial limitation of the locking block 3 is released, and under the action of the elastic force of the elastic piece, the locking block 3 drives the elastic piece to move inwards in the radial direction, so that the locking state of the upper joint 1 and the lower joint 2 can be smoothly released.
Preferably, guide slopes 31 are provided between the upper end surface and the outer wall surface and between the lower end surface and the outer wall surface of the lock block 3. The guide slope 31 helps the locking piece 3 to be smoothly released from the groove 22, and the locked state of the upper joint 1 and the lower joint 2 is released.
At the lower end of the lower joint 1 a receiving basket 8 is arranged, which receiving basket 8 is located in the inner cavity of the lower joint 2 for receiving the dropped support sleeve 4 and the ball 200. Structurally, the receiving basket 8 is cylindrical, and the inner cavity of the receiving basket is communicated with the upper joint 1. A radial projection 81 is provided on the inner wall of the lower end of the receiving basket 8 for limiting the further downward movement of the support sleeve 4. The outer wall of the receiving basket 8 is provided with a communication hole 82 which is communicated with the inside and the outside, and after the support sleeve 4 and the ball 300 are seated on the protruding platform 81, the inner cavity and the outer cavity of the releasing device 100 are communicated through the communication hole 82, so that the pressure relief is completed. The bearing basket 8 and the lower joint 1 can be of an integral structure or a split structure.
The device 100 is also provided with a seal 9 to ensure a seal between the respective connected parts. For example, a seal 9 is provided between the upper and lower couplings 1, 2 to ensure sealing of the inner cavity of the device 100 from the outside. Similarly, a seal 9 is also provided between the support sleeve 4 and the upper sub 1 to ensure the pressure holding effect of the inner cavity of the device 100 after the throw.
The application also relates to a drilling string (not shown in the figures) comprising a device 100 as described above, the upper and lower joints 1 and 2 of the device 100 being connected to drill pipes, respectively. The device 100 is a part of the drill pipe that can transmit torque during drilling. After drilling is complete, the release device 100 is operated to perform a release operation, leaving the lower sub 2 and other components below in the wellbore as part of the completion string. Thus, the releasing device 100 can help to meet the integrated process requirements of drilling and completion.
In this application, the "first operating state" refers to a state where the releasing device 100 is not released and the upper joint 1 and the lower joint 2 are fixedly connected, and the "second operating state" refers to a state where the releasing device 100 is released and the upper joint 1 and the lower joint 2 are released from the fixed connection.
In the present application, the orientation terms "upper" and "lower" are used with reference to the actual operating orientation of the releasing device 100.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A releasing device, comprising:
a cylindrical upper joint, a cylindrical lower joint and a cylindrical upper joint,
a cylindrical lower joint which is partially sleeved at the lower end of the upper joint,
a circumferentially disposed ratcheting assembly disposed between the upper sub and the lower sub,
wherein in a first operating condition the lower sub is configured to be fixedly connected to the upper sub and the toothing assembly is active, and in a second operating condition the lower sub is configured to be released from the upper sub and the toothing assembly is inactive,
providing a locking assembly between the upper joint and the lower joint at the overlap, the locking assembly comprising:
a locking block embedded in a groove provided on an inner wall of the lower joint and radially penetrating a wall of the upper joint;
the supporting sleeve is used for limiting the locking block and is sleeved in the inner cavity of the upper joint;
a shear pin capable of selectively securing the support sleeve relative to the upper sub; and
the inner sleeve is arranged between the supporting sleeve and the upper joint, the inner sleeve is sleeved in an inner cavity of the upper joint, the lower end face of the inner sleeve abuts against a first step face arranged on the inner wall of the upper joint, and the shearing pin is arranged between the inner sleeve and the supporting sleeve.
2. The releasing device of claim 1, wherein the tooth interface assembly has:
a plurality of first teeth circumferentially spaced on an outer wall of the upper fitting,
a plurality of second teeth circumferentially spaced on an inner wall of the lower sub,
and after the lower end of the upper joint is sleeved in an inner cavity at the upper end of the lower joint, the first teeth are meshed with the second teeth in a concave-convex matching manner.
3. The releasing device as in claim 2, wherein each of the first teeth and each of the second teeth has a tooth height to corresponding tooth base ratio of 0.3 to 1.
4. The releasing device of claim 1, wherein a ball seat is provided on an inner wall of the support sleeve.
5. A release device according to any of claims 1-4, wherein a resilient member is provided between the bottom wall of the recess and the locking block.
6. A release device according to any of claims 1 to 4, wherein guide ramps are provided between the upper end face and the outer wall face and between the lower end face and the outer wall face of the locking block.
7. A release device according to any of claims 1 to 4, wherein a receiving basket is provided at the lower end of the upper sub for receiving the support sleeve.
8. A drilling string comprising a release device according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293585.5A CN111119771B (en) | 2018-11-01 | 2018-11-01 | Releasing device and drilling string comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293585.5A CN111119771B (en) | 2018-11-01 | 2018-11-01 | Releasing device and drilling string comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111119771A CN111119771A (en) | 2020-05-08 |
| CN111119771B true CN111119771B (en) | 2022-03-04 |
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ID=70494708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811293585.5A Active CN111119771B (en) | 2018-11-01 | 2018-11-01 | Releasing device and drilling string comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111119771B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922580A (en) | 2022-06-07 | 2022-08-19 | 西南石油大学 | Controllable downhole drilling and completion tool separation device and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387258Y (en) * | 1999-07-02 | 2000-07-12 | 辽河石油勘探局钻采工艺研究院 | Giving up appts. for double enclosed tail pipe well completion pipe column |
| CN200978658Y (en) * | 2006-08-23 | 2007-11-21 | 马绍国 | Sand-proof and filling tool for oil well |
| AU2014208263A1 (en) * | 2012-10-01 | 2014-08-21 | Weatherford Technology Holdings, Llc | Insert units for non-metallic slips oriented normal to cone face |
| CN204941405U (en) * | 2015-09-17 | 2016-01-06 | 中国石油化工股份有限公司 | A kind of pitching releasing tool |
| CN105464601A (en) * | 2015-12-24 | 2016-04-06 | 中国石油天然气股份有限公司 | Multipurpose releasing tool capable of being used for continuous operation |
| CN105484676A (en) * | 2016-01-12 | 2016-04-13 | 中国石油化工股份有限公司 | Layered gas injection safety joint and using method thereof |
| CN105625954A (en) * | 2016-01-12 | 2016-06-01 | 中国石油大学(华东) | Safety device for intelligent well completion |
| CN205977165U (en) * | 2016-08-22 | 2017-02-22 | 中国石油化工股份有限公司 | Well blanking plug of giving up |
| CN108019158A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Fluid pressure type back-off sub |
| CN108131103A (en) * | 2017-11-15 | 2018-06-08 | 中国石油天然气股份有限公司 | Interlocking connector tool and above carry expanding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5086843A (en) * | 1990-09-27 | 1992-02-11 | Union Oil Company Of California | Oil tool release joint |
| CN205330562U (en) * | 2016-01-12 | 2016-06-22 | 中国石油化工股份有限公司 | Layering gas injection safety joint |
-
2018
- 2018-11-01 CN CN201811293585.5A patent/CN111119771B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387258Y (en) * | 1999-07-02 | 2000-07-12 | 辽河石油勘探局钻采工艺研究院 | Giving up appts. for double enclosed tail pipe well completion pipe column |
| CN200978658Y (en) * | 2006-08-23 | 2007-11-21 | 马绍国 | Sand-proof and filling tool for oil well |
| AU2014208263A1 (en) * | 2012-10-01 | 2014-08-21 | Weatherford Technology Holdings, Llc | Insert units for non-metallic slips oriented normal to cone face |
| CN204941405U (en) * | 2015-09-17 | 2016-01-06 | 中国石油化工股份有限公司 | A kind of pitching releasing tool |
| CN105464601A (en) * | 2015-12-24 | 2016-04-06 | 中国石油天然气股份有限公司 | Multipurpose releasing tool capable of being used for continuous operation |
| CN105484676A (en) * | 2016-01-12 | 2016-04-13 | 中国石油化工股份有限公司 | Layered gas injection safety joint and using method thereof |
| CN105625954A (en) * | 2016-01-12 | 2016-06-01 | 中国石油大学(华东) | Safety device for intelligent well completion |
| CN205977165U (en) * | 2016-08-22 | 2017-02-22 | 中国石油化工股份有限公司 | Well blanking plug of giving up |
| CN108019158A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Fluid pressure type back-off sub |
| CN108131103A (en) * | 2017-11-15 | 2018-06-08 | 中国石油天然气股份有限公司 | Interlocking connector tool and above carry expanding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111119771A (en) | 2020-05-08 |
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