CN111852367A - Intubation type releasing joint and using method thereof - Google Patents
Intubation type releasing joint and using method thereof Download PDFInfo
- Publication number
- CN111852367A CN111852367A CN202010780171.6A CN202010780171A CN111852367A CN 111852367 A CN111852367 A CN 111852367A CN 202010780171 A CN202010780171 A CN 202010780171A CN 111852367 A CN111852367 A CN 111852367A
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- mandrel
- joint
- pipe column
- sealing
- release
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002627 tracheal intubation Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 3
- 238000010168 coupling process Methods 0.000 claims 3
- 238000005859 coupling reaction Methods 0.000 claims 3
- 230000008569 process Effects 0.000 abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000017105 transposition Effects 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 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
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to an intubation type releasing joint and a using method thereof. The mandrel assembly is characterized in that a pawl is arranged between the upper connector and the mandrel assembly, an upper connector and a sealing outer barrel are arranged on the outer side of the pawl, the sealing outer barrel is arranged on the outer side of the mandrel assembly, the mandrel assembly is composed of an upper mandrel, a lower mandrel and a pressing cap which are connected with each other, a sealing component is arranged on the outer side of the upper mandrel, and a sealing component is arranged on the outer side of the lower mandrel. The invention abandons the arrangement of the transposition groove of the traditional releaser, reduces the possibility of improper transposition in the wellhead operation process, reduces the influence of special shafts such as deep wells, inclined wells, horizontal wells and the like on the pipe column, improves the releasing success rate of the pipe column and enables the water blocking releasing and blocking releasing process to have more choices.
Description
Technical Field
The invention relates to the field of oil testing well completion engineering, in particular to an insertion pipe type release joint and a using method thereof.
Background
With the gradual deepening of oil and gas field development, most old oil areas of various high-strength oil fields enter a high-water-content exploitation stage, special wells such as deep wells, inclined wells, directional wells and horizontal wells in new drilling wells are more and more, and the layering of oil layers is more and more refined. In the later development stage, finding water plugging is an important process measure for improving the recovery ratio of the oil field; the mechanical layered blocking water and oil production technology is reliable and easy to implement, and becomes a method commonly adopted by western oil fields. Meanwhile, the hydraulic packer is matched with the water blocking and layering process pipe column of the releasing tool, and the hydraulic packer is more and more widely applied to complex well conditions such as deep wells, horizontal wells, inclined wells, directional wells and the like by virtue of the advantages that the packer is not influenced by well repairing operations such as a pump detection and the like and alternating load action and the like. From the whole releasing process pipe column, the performance of the releasing tool is the key of the success or failure of the releasing process pipe column. The traditional mechanical releasing device is influenced by the well depth, well deviation and drilling fluid performance, the transposition is difficult, and the releasing operation is difficult; the hydraulic releasing device cannot realize back-plugging fishing operation due to structural restriction.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an insertion pipe type release joint, which can effectively reduce the influence of well conditions, solve the problem that the back insertion cannot be carried out in the later period and the like, greatly improve the water plugging process efficiency, realize the adaptation to various working conditions and provide powerful guarantee for the smooth production and yield increasing measures after the completion of an oil-gas well.
The invention relates to an intubation type releasing joint, which comprises: one end of the mandrel assembly is fixedly connected with an upper joint, and the outside and the other end of the mandrel assembly are coated by a sealing sleeve; a pawl is arranged at the contact position of the sealing sleeve and the upper joint; the shaft core assembly comprises an upper core shaft, a lower core shaft and a pressing cap which are connected in sequence, the upper core shaft, the lower core shaft and the pressing cap are wrapped by a sealing sleeve, a convex shoulder is arranged on the outer side of the upper core shaft, an annular groove is arranged on one side of the convex shoulder, and a pawl is fixedly arranged between the upper core shaft and the annular groove; and a through hole is formed in the position, close to the upper mandrel, of the sealing sleeve and used for installing a retaining nail, and the retaining nail penetrates through the through hole and is fixedly connected with the other side of the upper mandrel shoulder.
In the above scheme, the front ends of the upper joint and the upper mandrel are provided with the first O-shaped sealing ring.
In the scheme, the upper joint is connected with the upper mandrel of the mandrel assembly through threads.
In the above scheme, the front ends of the upper joint and the upper mandrel are provided with the first O-shaped sealing ring.
In the above scheme, a first sealing assembly is arranged between the upper mandrel and the sealing sleeve.
In the above scheme, a second sealing assembly is arranged between the lower mandrel and the sealing sleeve.
In the above scheme, the end part of the threaded connection between the upper mandrel and the lower mandrel is provided with the second O-shaped sealing ring.
In the above scheme, the end part of the threaded connection between the lower mandrel and the pressing cap is provided with a third O-shaped sealing ring.
The invention also provides a using method of the intubation type releasing joint, which comprises the following steps:
after the setting and the seal checking of the hydraulic packer are qualified, when the hydraulic packer is in a setting and seal checking operation, the pipe column is rotated forward 14-15 circles under the condition of slight tension, the backstop pin on the insert pipe type release joint is firstly cut off, so that the thread buckle of the insert pipe type release joint mandrel assembly is gradually screwed out of the sealing outer cylinder, and the pipe column is lifted up, thereby realizing the release;
when the pipe column needs to be inserted back, after the outer sealing cylinder of the insertion pipe type releasing joint is washed, the pipe column is directly pressed down, and the telescopic thread buckle can be clamped into a thread buckle groove in the lower sealing outer cylinder; under the extrusion action of the mandrel of the upper joint of the insertion pipe type releasing joint, the special threads are tightly fastened and tightly bitten in the fastening groove of the sealing outer cylinder, and the original well pipe column can be taken out by lifting the pipe column.
The implementation of the intubation type releasing joint and the releasing method thereof has the following beneficial effects:
1. according to the invention, the arrangement of the traditional transposition groove is changed, so that the possibility of not-in-place transposition in the well head operation process is reduced, and the influence of special shafts such as deep wells, inclined wells and horizontal wells on the pipe column is reduced.
2. The plug-in pipe type releasing joint is subjected to rotary tripping and pin shearing releasing, so that negative effects on screw threads at other parts of a pipe string are not easily generated in the releasing operation process, the plug-in pipe type releasing joint is also suitable for releasing operation of a mechanical packer, and the reliability and the application range of water plugging operation are greatly improved.
3. Compared with the prior traditional releasing joint, the releasing joint has the advantages of high temperature resistance, high tensile strength and smart matching of the special thread button and the upper joint mandrel, and also well solves the problems of back insertion and occlusion.
4. The advantages of the mechanical and hydraulic releasing device at the early stage are integrated, so that more choices are provided in the water blocking and releasing process.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of the intubation type releasing joint of the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the intubation type releasing sub of the invention comprises: one end of the mandrel assembly is fixedly connected with an upper joint 1, and the outside and the other end of the mandrel assembly are covered by a sealing sleeve 11; a pawl 3 is arranged at the contact position of the sealing sleeve 11 and the upper joint 1; the shaft core assembly comprises an upper core shaft 4, a lower core shaft 7 and a pressing cap 10 which are connected in sequence, the upper core shaft 4, the lower core shaft 7 and the pressing cap are wrapped by a sealing sleeve 11, a convex shoulder is arranged on the outer side of the upper core shaft 4, an annular groove is arranged on one side of the convex shoulder, and the pawl 3 is fixedly arranged between the upper core shaft 4 and the annular groove; and a through hole is formed in the position, close to the upper mandrel 4, of the sealing sleeve 11 and used for installing a retaining nail 12, and the retaining nail 12 penetrates through the through hole and is fixedly connected with the other side of the shoulder of the upper mandrel 4.
The upper joint 1 is connected with the upper mandrel 4 through threads; a first O-shaped sealing ring 2 is arranged between the upper joint 1 and the upper mandrel 4; the pawl 3 is connected with the sealing outer cylinder 11 through threads; the upper mandrel 4 is connected with the lower mandrel 7 through threads; the lower mandrel 7 is connected with the pressing cap 10 through threads; a second O-shaped sealing ring 6 is arranged between the upper mandrel 4 and the lower mandrel 7; a third O-shaped sealing ring 9 is arranged between the lower mandrel 7 and the pressing cap 10; and a backstop pin 12 is arranged between the sealing outer cylinder 11 and the upper mandrel 4.
The plug pipe type releasing joint and the process pipe column thereof can be applied to zonal reconstruction, zonal injection, zonal oil production and zonal well washing in oilfield production and comprise an upper pipe section, a releasing joint and a lower pipe section which are sequentially connected in series from top to bottom, wherein the lower pipe section is provided with a packer and/or a hanger with a reversing mechanism, so that the process pipe column needs to be rotated in the process of setting and unsealing, and the setting and unsealing of the process pipe column are carried out through the reversing of the reversing mechanism.
When not in use, the relative fixation between the sealing sleeve 11 and the upper mandrel 4 is achieved by means of the retaining nail 12: the retaining nail 12 penetrates through a through hole formed in the sealing sleeve 11 and is fixedly connected with the upper mandrel 4, so that the relative fixation of the positions of the sealing sleeve 11 and the upper mandrel 4 is realized. Even if the upper mandrel 4 and the sealing sleeve 11 cannot move relative to each other at this time. After the retaining nail 12 is cut off, the thread buckle of the pawl 3 can be gradually screwed out of the sealing outer cylinder 11 through the thread arranged on the mandrel assembly. The pipe column is sleeved outside the release, when the release is operated, the pawl 3 is extended out, the pipe column is rotated forward for 14-15 circles only under the condition that the pipe column is slightly pulled, the backstop pin 12 on the insertion pipe type release joint is firstly cut off, then the pawl 3 thread buckle always supported on the upper portion of the insertion pipe type release joint is gradually screwed out of the sealing outer cylinder 11, and the pipe column is lifted up, so that the release is realized. When the pipe column needs to be inserted back, the pipe column is directly pressed down, and the retractable pawl 3 can be clamped into the thread buckle groove in the lower sealing outer cylinder 11 through the thread buckle. Under the extrusion action of the mandrel of the upper joint of the insertion pipe type releasing joint, the special threads are tightly fastened and tightly bitten in the catching groove of the sealing outer cylinder 11, and the original well pipe column can be taken out by lifting the pipe column.
When the releasing joint is used for setting operation, the process pipe column in the embodiment is lowered to a designed position, then the process pipe column is rotated, so that the reversing mechanisms of the packer and the hanger are reversed, and setting is pressed; and when the deblocking is needed, reversely rotating the process pipe column for deblocking.
In addition, the invention also provides a using method of the intubation type releasing joint, which comprises the following steps:
after the setting and the seal checking of the hydraulic packer are qualified, in the releasing operation, the pipe column is rotated forward 14-15 circles under the condition of slight tension, the backstop pin 12 on the insert pipe type releasing joint is firstly cut off, then the pawl 3 thread buckle always supported on the upper part of the insert pipe type releasing joint is gradually screwed out of the sealing outer cylinder 11, and the pipe column is lifted up, so that the releasing is realized.
When the pipe column needs to be inserted back, after the outer sealing cylinder 11 of the insertion pipe type releasing joint is washed, the pipe column is directly pressed down, and the retractable pawl 3 thread buckle can be clamped into the thread buckle groove in the lower sealing outer cylinder 11. Under the extrusion action of the mandrel of the upper joint of the insertion pipe type releasing joint, the special threads are tightly fastened and tightly bitten in the catching groove of the sealing outer cylinder 11, and the original well pipe column can be taken out by lifting the pipe column.
The implementation of the intubation type releasing joint and the releasing method thereof has the following beneficial effects:
1. according to the invention, the arrangement of the traditional transposition groove is changed, so that the possibility of not-in-place transposition in the well head operation process is reduced, and the influence of special shafts such as deep wells, inclined wells and horizontal wells on the pipe column is reduced.
2. The plug-in pipe type releasing joint is subjected to rotary tripping and pin shearing releasing, so that negative effects on screw threads at other parts of a pipe string are not easily generated in the releasing operation process, the plug-in pipe type releasing joint is also suitable for releasing operation of a mechanical packer, and the reliability and the application range of water plugging operation are greatly improved.
3. Compared with the prior traditional releasing joint, the releasing joint has the advantages of high temperature resistance, high tensile strength and smart matching of the special thread button and the upper joint mandrel, and also well solves the problems of back insertion and occlusion.
4. The advantages of the mechanical and hydraulic releasing device at the early stage are integrated, so that more choices are provided in the water blocking and releasing process.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The intubation type releasing joint is characterized by comprising a mandrel assembly, wherein one end of the mandrel assembly is fixedly connected with an upper joint, and the outside and the other end of the mandrel assembly are coated by a sealing sleeve; a pawl is arranged at the contact position of the sealing sleeve and the upper joint; the mandrel assembly comprises an upper mandrel, a lower mandrel and a pressing cap which are connected in sequence, the upper mandrel, the lower mandrel and the pressing cap are wrapped by a sealing sleeve, a convex shoulder is arranged on the outer side of the upper mandrel, an annular groove is arranged on one side of the convex shoulder, and a pawl is fixedly arranged between the upper mandrel and the annular groove; the position of the sealing sleeve close to the upper mandrel is provided with a through hole for installing a retaining nail, and the retaining nail penetrates through the through hole and is fixedly connected with the other side of the upper mandrel shoulder.
2. The stinger release joint of claim 1, wherein the upper joint is threadably connected to the upper mandrel of the mandrel assembly.
3. The stinger release joint of claim 2, wherein a first O-ring seal is disposed between the upper joint and the front end of the upper mandrel.
4. The stinger release coupling of claim 1, wherein the pawl is threadably engaged with the outer seal barrel.
5. The stinger release joint of claim 1, wherein a first seal assembly is disposed between the upper mandrel and the seal sleeve.
6. The stinger release joint of claim 1, wherein a second seal assembly is disposed between the lower mandrel and the seal sleeve.
7. The stinger release joint of claim 1, wherein a second O-ring seal is provided at the end of the threaded connection between the upper mandrel and the lower mandrel.
8. The stinger release coupling of claim 1, wherein the end of the threaded connection between the lower mandrel and the crimp cap is provided with a third O-ring seal.
9. A method of using a stinger-type release coupling as claimed in any of claims 1 to 8, comprising the steps of:
after the setting and the seal checking of the hydraulic packer are qualified, when the hydraulic packer is in a setting and seal checking operation, the pipe column is rotated forward 14-15 circles under the condition of slight tension, the backstop pin on the insert pipe type release joint is firstly cut off, so that the thread buckle of the insert pipe type release joint mandrel assembly is gradually screwed out of the sealing outer cylinder, and the pipe column is lifted up, thereby realizing the release;
when the pipe column needs to be inserted back, after the outer sealing cylinder of the insertion pipe type releasing joint is washed, the pipe column is directly pressed down, and the telescopic thread buckle can be clamped into a thread buckle groove in the lower sealing outer cylinder; under the extrusion action of the mandrel of the upper joint of the insertion pipe type releasing joint, the special threads are tightly fastened and tightly bitten in the fastening groove of the sealing outer cylinder, and the original well pipe column can be taken out by lifting the pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780171.6A CN111852367A (en) | 2020-08-05 | 2020-08-05 | Intubation type releasing joint and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780171.6A CN111852367A (en) | 2020-08-05 | 2020-08-05 | Intubation type releasing joint and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111852367A true CN111852367A (en) | 2020-10-30 |
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ID=72972185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010780171.6A Pending CN111852367A (en) | 2020-08-05 | 2020-08-05 | Intubation type releasing joint and using method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN111852367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374430A (en) * | 2021-07-07 | 2021-09-10 | 中石化石油工程技术服务有限公司 | Large-drift-diameter differential pressure type multifunctional releasing tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808594A (en) * | 2012-08-17 | 2012-12-05 | 中国海洋石油总公司 | Device and method for multi-stage layering sand prevention and well completion by one-step pipe column |
| CN103291235A (en) * | 2013-06-08 | 2013-09-11 | 四机赛瓦石油钻采设备有限公司 | Tool for sending hydraulic packer into well |
| CN205154078U (en) * | 2015-12-04 | 2016-04-13 | 武汉亿达联创石油科技有限公司 | Release device |
| CN108825157A (en) * | 2018-08-23 | 2018-11-16 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
| CN210370560U (en) * | 2019-08-28 | 2020-04-21 | 荆州市赛瑞能源技术有限公司 | Multipurpose packer feeding tool |
| CN212614601U (en) * | 2020-08-05 | 2021-02-26 | 中石化石油工程技术服务有限公司 | Intubation type releasing joint |
-
2020
- 2020-08-05 CN CN202010780171.6A patent/CN111852367A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808594A (en) * | 2012-08-17 | 2012-12-05 | 中国海洋石油总公司 | Device and method for multi-stage layering sand prevention and well completion by one-step pipe column |
| CN103291235A (en) * | 2013-06-08 | 2013-09-11 | 四机赛瓦石油钻采设备有限公司 | Tool for sending hydraulic packer into well |
| CN205154078U (en) * | 2015-12-04 | 2016-04-13 | 武汉亿达联创石油科技有限公司 | Release device |
| CN108825157A (en) * | 2018-08-23 | 2018-11-16 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
| CN210370560U (en) * | 2019-08-28 | 2020-04-21 | 荆州市赛瑞能源技术有限公司 | Multipurpose packer feeding tool |
| CN212614601U (en) * | 2020-08-05 | 2021-02-26 | 中石化石油工程技术服务有限公司 | Intubation type releasing joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374430A (en) * | 2021-07-07 | 2021-09-10 | 中石化石油工程技术服务有限公司 | Large-drift-diameter differential pressure type multifunctional releasing tool |
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