CN114934759B - N-type removable oil pipe inner bridge plug - Google Patents
N-type removable oil pipe inner bridge plug Download PDFInfo
- Publication number
- CN114934759B CN114934759B CN202210610085.XA CN202210610085A CN114934759B CN 114934759 B CN114934759 B CN 114934759B CN 202210610085 A CN202210610085 A CN 202210610085A CN 114934759 B CN114934759 B CN 114934759B
- Authority
- CN
- China
- Prior art keywords
- mandrel
- sliding sleeve
- bridge plug
- outer cylinder
- oil pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
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)
- Bridges Or Land Bridges (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a bridge plug, in particular to an N-type removable oil pipe inner bridge plug. An N-type removable oil pipe inner bridge plug comprises a mandrel, wherein the upper end of the mandrel is fixedly connected with a stress rod, and the stress rod is provided with an annular shear groove. The outside of the mandrel is sequentially sleeved with an outer cylinder, an upper sliding sleeve, slips, a lower sliding sleeve, a sealing rubber cylinder and an end sleeve from top to bottom. The beneficial effects of the invention are as follows: the removable bridge plug is high in bearing pressure and easy to operate, is scientific and reasonable in structural design, is easy to realize, is subjected to seat sealing through a feeding tool, is lifted up for unsealing, can be used as a bridge plug, a hanger and a packer, and has good application and popularization values.
Description
Technical Field
The invention relates to a bridge plug, in particular to an N-type removable oil pipe inner bridge plug.
Background
Oil and gas well testing, completion, and other operations sometimes require permanent or temporary plugging in the tubing. The bridge plug has the functions of an oil-gas well sealing layer, has the characteristics of less construction procedures, short period and accurate clamping sealing position, and is divided into a permanent bridge plug and a removable bridge plug. The removable bridge plug is generated along with the appearance of the permanent bridge plug, is formed in the 80 s, and is widely used as an underground plugging tool for oil fields in oil field exploration and development for plugging the lower well section during the construction of separate fracturing, separate acidizing and separate oil testing of an oil-water well. The problems of complex setting, salvaging and deblocking operations and low using success rate are well solved. The functional part can replace a releasing, a packer, a permanent bridge plug and an ash injection plugging, and is a safe, reliable, low-cost and complete-function underground plugging tool. When the bridge plug is in a well, the bridge plug is connected with a setting tool through the breaking rod and the breaking ring, and after the bridge plug is conveyed to a preset position of a shaft by using a cable or a pipe column, the bridge plug is set and released through ground ignition detonation or pressing from the inside of an oil pipe, so that the bridge plug is safe and reliable. When in salvaging, the salvaging tool is only required to be lowered to open the central pipe locking mechanism on the bridge plug, and then the pipe column is put on, so that the unsealing can be realized. The method has the characteristics of simple setting, salvaging and deblocking operations, convenient construction, high success rate of use and the like.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and providing an N-type removable oil pipe inner bridge plug.
The invention is realized by the following technical scheme:
An N-type removable oil pipe inner bridge plug comprises a mandrel, wherein the upper end of the mandrel is fixedly connected with a stress rod, and the stress rod is provided with an annular shear groove. The outside of the mandrel is sequentially sleeved with an outer cylinder, an upper sliding sleeve, slips, a lower sliding sleeve, a sealing rubber cylinder and an end sleeve from top to bottom.
The outer cylinder is provided with a through hole, the mandrel is provided with a blind hole, the through hole is aligned with the blind hole and is provided with a pin, and the specific outer cylinder is fixedly connected with the mandrel through a plurality of pins. The contact surface of the outer cylinder and the mandrel is respectively provided with a ratchet, the outer cylinder and the mandrel are connected through the ratchet, and the ratchet limits the outer cylinder to slide along the mandrel. The outer cylinder is provided with a connecting neck which extends out of the stress rod, and the outer port of the connecting neck is provided with a flange.
The upper sliding sleeve is in sliding connection with the mandrel, the upper end of the upper sliding sleeve is abutted with the outer cylinder, the upper end of the upper sliding sleeve is provided with a step part, and the step part is inserted into the outer cylinder.
The slips are provided with an upper inclined plane and a lower inclined plane which are parallel to each other, the upper inclined plane of each slip is abutted with the lower end inclined plane of the upper sliding sleeve, the lower inclined plane is abutted with the upper end inclined plane of the lower sliding sleeve, and the outer surface of each slip is provided with a latch.
The lower end of the lower sliding sleeve is abutted with the upper end of the sealing rubber cylinder, the lower end of the sealing rubber cylinder is abutted with the end sleeve, the end sleeve is fixedly connected with the mandrel, and the sealing rubber cylinder is of a cavity structure made of elastic materials.
The dabber is equipped with the pressure release hole, and the lower extreme opening in pressure release hole is located the dabber lower extreme, and the other end opening in pressure release hole is located between slips and the upper sliding sleeve.
The beneficial effects of the invention are as follows: the removable bridge plug is high in bearing pressure and easy to operate, is set by a running tool, is lifted up for deblocking, and can be used as a bridge plug, a hanger and a packer. The oil pipe bridge plug is connected with the running tool through the stress rod, the position distance between the running tool and the bridge plug body is adjusted, the pressure outer cylinder is guaranteed to be in contact with the running tool and the bridge plug body, and then the oil pipe bridge plug is put into the appointed position of the oil pipe, and at the moment, the pressure in the bridge plug is balanced with the annular pressure.
After the oil pipe bridge plug is put into a designated position, the feeding tool pushes the outer barrel to shear the pin, the outer barrel pushes the upper sliding sleeve, the upper sliding sleeve and the lower sliding sleeve squeeze the slips, so that the slips are deformed and anchored with the inner wall of the oil pipe, and meanwhile, the lower sliding sleeve squeezes the sealing rubber barrel, so that the sealing rubber barrel forms a seal with the inner wall of the oil pipe after expanding, and after the outer barrel pushes the sliding sleeve to move, the sliding sleeve seals the pressure relief hole, so that the seat sealing process is completed
And then, the running tool continues to push the pressure outer cylinder, when a certain pushing force is reached, the stress rod is sheared, the ratchet inside the bridge plug and the slips form locking, the bridge plug completes seat sealing, and the running tool is taken out.
Drawings
Fig. 1 shows a schematic diagram of a front view structure of an embodiment of the present invention.
In the figure: 1. the mandrel is characterized by comprising a mandrel, a stress rod, an outer barrel, an upper sliding sleeve, a slip, a lower sliding sleeve, a sealing rubber cylinder, an end sleeve, a pin and a pressure release hole.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present invention. All other embodiments, based on the embodiments of the invention, which would be apparent to one of ordinary skill in the art without making any inventive effort are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
As shown in the figure, the N-type removable oil pipe inner bridge plug comprises a mandrel 1, wherein the upper end of the mandrel is fixedly connected with a stress rod 2, and the stress rod is provided with an annular shear groove. The outside of the mandrel is sequentially sleeved with an outer cylinder 3, an upper sliding sleeve 4, slips 5, a lower sliding sleeve 6, a sealing rubber cylinder 7 and an end sleeve 8 from top to bottom.
The outer cylinder is provided with a through hole, the mandrel is provided with a blind hole, the through hole is aligned with the blind hole and is provided with a pin 9, and the specific outer cylinder is fixedly connected with the mandrel through a plurality of pins. The contact surface of the outer cylinder and the mandrel is respectively provided with a ratchet, the outer cylinder and the mandrel are connected through the ratchet, and the ratchet limits the outer cylinder to slide along the mandrel. The outer cylinder is provided with a connecting neck which extends out of the stress rod, and the outer port of the connecting neck is provided with a flange.
The upper sliding sleeve is in sliding connection with the mandrel, the upper end of the upper sliding sleeve is abutted with the outer cylinder, the upper end of the upper sliding sleeve is provided with a step part, and the step part is inserted into the outer cylinder.
The slips are provided with an upper inclined plane and a lower inclined plane which are parallel to each other, the upper inclined plane of each slip is abutted with the lower end inclined plane of the upper sliding sleeve, the lower inclined plane is abutted with the upper end inclined plane of the lower sliding sleeve, and the outer surface of each slip is provided with a latch.
The lower end of the lower sliding sleeve is abutted with the upper end of the sealing rubber cylinder, the lower end of the sealing rubber cylinder is abutted with the end sleeve, the end sleeve is fixedly connected with the mandrel, and the sealing rubber cylinder is of a cavity structure made of elastic materials.
The dabber is equipped with pressure release hole 10, and pressure release hole's lower extreme opening is located the dabber lower extreme, and pressure release hole's other end opening is located between slips and the upper sliding sleeve.
The working principle of the embodiment is as follows:
1, preparation:
(1) Confirming that the breaking force of the bridge plug stress rod matches the maximum pull force of the running tool.
(2) The operating temperature of the cement and the well Wen Pipei being lowered into the well are determined.
(3) Determining the total shear value of the bridge plug unsealing pin; and the shearing, deblocking and recycling in the future are facilitated.
(4) The running tool, the bridge plug adapter and the bridge plug are connected.
2, The process of entering and seating:
The oil pipe bridge plug is connected with the running tool through the stress rod, the position distance between the running tool and the bridge plug body is adjusted, the pressure outer cylinder is guaranteed to be in contact with the running tool and the bridge plug body, and then the oil pipe bridge plug is put into the appointed position of the oil pipe, and at the moment, the pressure in the bridge plug is balanced with the annular pressure.
After the oil pipe bridge plug is put into a designated position, the feeding tool pushes the outer barrel to shear the pin, the outer barrel pushes the upper sliding sleeve, the upper sliding sleeve and the lower sliding sleeve squeeze the slips, so that the slips are deformed and anchored with the inner wall of the oil pipe, and meanwhile, the lower sliding sleeve squeezes the sealing rubber barrel, so that the sealing rubber barrel forms a seal with the inner wall of the oil pipe after expanding, and after the outer barrel pushes the sliding sleeve to move, the sliding sleeve seals the pressure relief hole, so that the seat sealing process is completed
And then, the running tool continues to push the pressure outer cylinder, when a certain pushing force is reached, the stress rod is sheared, the ratchet inside the bridge plug and the slips form locking, the bridge plug completes seat sealing, and the running tool is taken out.
And 3, the recovery tool is put down, namely the recovery tool is put down and touches the bridge plug salvaging neck, the salvaging neck pushes the salvaging spear in the recovery tool and compresses the spring, and the recovery tool is continuously put down to push the salvaging spear to open so as to lock the bridge plug salvaging neck.
(1) Changing a running tool in the running tool string into a special GS salvage anchor;
(2) The GS fishing spear is inserted into the bridge plug by the falling and striking;
(3) After successful butt joint with the bridge plug is confirmed, the device is up-clicked. And (3) a locking ring for vibrating open the bridge plug.
(4) And (3) lifting, namely judging that the bridge plug mandrel moves upwards and is balanced.
(5) Lifting, the suspending weight disappears, and the bridge plug is unsealed.
The beneficial effects of the invention are as follows: the removable bridge plug is high in bearing pressure and easy to operate, and is lifted and unsealed through a running tool seat seal. And can be used as a bridge plug, a hanger and a packer.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (3)
1. An N-type removable oil pipe inner bridge plug is characterized by comprising a mandrel;
The upper end of the mandrel is fixedly connected with a stress rod, and the stress rod is provided with an annular shear groove;
the outer cylinder, the upper sliding sleeve, the slips, the lower sliding sleeve, the sealing rubber cylinder and the end sleeve are sleeved outside the mandrel in sequence from top to bottom;
The outer cylinder is provided with a through hole, the mandrel is provided with a blind hole, the through hole is aligned with the blind hole and is provided with a pin, the contact surfaces of the outer cylinder and the mandrel are respectively provided with a ratchet, the outer cylinder is provided with a connecting neck, the connecting neck extends out of the stress rod, the outer port of the connecting neck is provided with a flange, the outer cylinder is connected with the mandrel through the ratchet, and the ratchet limits the outer cylinder to slide along the mandrel;
the upper sliding sleeve is in sliding connection with the mandrel, and the upper end of the upper sliding sleeve is abutted with the outer cylinder;
the slip is provided with an upper inclined plane and a lower inclined plane which are parallel to each other, the upper inclined plane of the slip is abutted with the inclined plane at the lower end of the upper sliding sleeve, the lower inclined plane is abutted with the inclined plane at the upper end of the lower sliding sleeve, and the outer surface of the slip is provided with a latch;
the lower end of the lower sliding sleeve is abutted with the upper end of the sealing rubber cylinder, the lower end of the sealing rubber cylinder is abutted with the end sleeve, the end sleeve is fixedly connected with the mandrel, and the sealing rubber cylinder is of a cavity structure made of elastic materials;
The dabber is equipped with the pressure release hole, the lower extreme opening in pressure release hole is located the dabber lower extreme, the other end opening in pressure release hole is located between slips and the upper sliding sleeve.
2. An N-type removable oil pipe inner bridge as defined in claim 1, wherein said outer barrel and said mandrel are fixedly connected by a plurality of pins.
3. The N-type removable oil pipe inner bridge plug according to claim 1, wherein a step portion is arranged at the upper end of the upper sliding sleeve, and the step portion is inserted into the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210610085.XA CN114934759B (en) | 2022-06-01 | 2022-06-01 | N-type removable oil pipe inner bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210610085.XA CN114934759B (en) | 2022-06-01 | 2022-06-01 | N-type removable oil pipe inner bridge plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114934759A CN114934759A (en) | 2022-08-23 |
| CN114934759B true CN114934759B (en) | 2024-05-14 |
Family
ID=82866630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210610085.XA Active CN114934759B (en) | 2022-06-01 | 2022-06-01 | N-type removable oil pipe inner bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114934759B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1199086A (en) * | 1968-10-29 | 1970-07-15 | Schlumberger Technology Corp | Retrivable Well Packer |
| US4051897A (en) * | 1975-12-30 | 1977-10-04 | Gulf Research & Development Company | Well testing tool |
| US4834176A (en) * | 1988-04-11 | 1989-05-30 | Otis Engineering Corporation | Well valve |
| US5577560A (en) * | 1991-06-14 | 1996-11-26 | Baker Hughes Incorporated | Fluid-actuated wellbore tool system |
| CN104499988A (en) * | 2014-12-31 | 2015-04-08 | 牡丹江博实石油机械科技有限公司 | Anchor detachable packer |
| CN205778714U (en) * | 2016-05-31 | 2016-12-07 | 中国石油天然气股份有限公司 | The Recyclable packer of hydraulic setting |
| CN107605428A (en) * | 2017-12-11 | 2018-01-19 | 中国石油天然气股份有限公司 | One kind can pressure release shut-in well bridging plug |
| CN109798087A (en) * | 2019-03-13 | 2019-05-24 | 荆州市赛瑞能源技术有限公司 | A kind of retrievable hanging packer of double packing elements |
| CN209875110U (en) * | 2019-04-22 | 2019-12-31 | 盐城市鑫源石化机械有限公司 | Well completion packer with pressure relief balance channel |
| CN212614626U (en) * | 2020-06-04 | 2021-02-26 | 中石化石油工程技术服务有限公司 | Be applied to big inclination, complicated orbit well test packer |
-
2022
- 2022-06-01 CN CN202210610085.XA patent/CN114934759B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1199086A (en) * | 1968-10-29 | 1970-07-15 | Schlumberger Technology Corp | Retrivable Well Packer |
| US4051897A (en) * | 1975-12-30 | 1977-10-04 | Gulf Research & Development Company | Well testing tool |
| US4834176A (en) * | 1988-04-11 | 1989-05-30 | Otis Engineering Corporation | Well valve |
| US5577560A (en) * | 1991-06-14 | 1996-11-26 | Baker Hughes Incorporated | Fluid-actuated wellbore tool system |
| CN104499988A (en) * | 2014-12-31 | 2015-04-08 | 牡丹江博实石油机械科技有限公司 | Anchor detachable packer |
| CN205778714U (en) * | 2016-05-31 | 2016-12-07 | 中国石油天然气股份有限公司 | The Recyclable packer of hydraulic setting |
| CN107605428A (en) * | 2017-12-11 | 2018-01-19 | 中国石油天然气股份有限公司 | One kind can pressure release shut-in well bridging plug |
| CN109798087A (en) * | 2019-03-13 | 2019-05-24 | 荆州市赛瑞能源技术有限公司 | A kind of retrievable hanging packer of double packing elements |
| CN209875110U (en) * | 2019-04-22 | 2019-12-31 | 盐城市鑫源石化机械有限公司 | Well completion packer with pressure relief balance channel |
| CN212614626U (en) * | 2020-06-04 | 2021-02-26 | 中石化石油工程技术服务有限公司 | Be applied to big inclination, complicated orbit well test packer |
Non-Patent Citations (1)
| Title |
|---|
| Y422可取压裂桥塞的研制与应用;吴恩成;赵骊川;张书进;何艳;;石油机械;20051231(第12期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114934759A (en) | 2022-08-23 |
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