CN112555564A - Leakage-repairing lining pipe for oil well casing - Google Patents
Leakage-repairing lining pipe for oil well casing Download PDFInfo
- Publication number
- CN112555564A CN112555564A CN202110208076.3A CN202110208076A CN112555564A CN 112555564 A CN112555564 A CN 112555564A CN 202110208076 A CN202110208076 A CN 202110208076A CN 112555564 A CN112555564 A CN 112555564A
- Authority
- CN
- China
- Prior art keywords
- pipe
- wall
- sealing ring
- oil well
- bottom end
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1657—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section lengths of rigid pipe being inserted
Abstract
The invention discloses a leakage-repairing lining pipe for an oil well casing, which comprises an upper sealing pipe, a lower sealing pipe, an upper sealing ring, a lower sealing ring, a lining pipe, a positioning slip, a slip seat and a shearing disc, wherein the upper sealing pipe is connected with the upper sealing pipe; the upper and lower sealing pipes are symmetrically and slidably sleeved in the top end and the bottom end of the liner pipe; the upper sealing ring is sleeved on the outer wall of the upper sealing pipe, the top end of the upper sealing ring is fixed with the upper sealing pipe in a sealing manner, and the bottom end of the upper sealing ring is fixed with the liner pipe in a sealing manner; the lower sealing ring is sleeved on the outer wall of the lower sealing pipe, the bottom end of the lower sealing ring is fixed with the lower sealing pipe in a sealing way, and the top end of the lower sealing ring is fixed with the liner pipe in a sealing way; the bottom end of the lower sealing pipe is slidably sleeved on the outer wall of the top end of the slip seat, a plurality of inclined plane protrusions are arranged on the outer wall of the bottom of the lower sealing pipe in a surrounding mode, the diameter of the top end of each inclined plane protrusion is larger than that of the bottom end of each inclined plane protrusion, a positioning slip is arranged on the outer wall of each inclined plane protrusion, the inner wall of each positioning slip is matched with the inclined plane protrusions in a sliding mode, a first boss is arranged at the bottom of; the bottom end of the slip seat is detachably connected with the shearing disc, and the device is simple and efficient in operation, high in success rate, low in cost, durable and remarkable in economic benefit.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to an oil well casing leakage repairing lining pipe.
Background
In the process of oil exploitation and production, after long-time use, an oil well casing can be corroded and damaged to cause perforation leakage, so that oil exploitation cannot be smoothly carried out.
In the prior art, various leakage repairing modes for oil well casings, such as plugging agent leakage repairing, cement injection plugging and the like, however, the commonly adopted leakage repairing method in the prior art has the disadvantages of complex operation procedure, long construction period, high cost and short service life, and is difficult to meet the requirements of actual production.
Therefore, how to improve the plugging efficiency, simplify the plugging process, and make the plugging effect good and durable is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an oil well casing leakage repairing lining pipe, which uses temperature-resistant and corrosion-resistant plastic metal as an effective leakage stopping structure, and is simple and convenient to construct through the structural arrangement of the lining pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil well casing leakage repair lining pipe comprises an upper sealing pipe, an upper sealing ring, a lining pipe, a lower sealing ring, a positioning slip, a slip seat and a shearing disc;
the bottom end of the upper sealing pipe is slidably sleeved on the inner side of the top end of the liner pipe;
the upper sealing ring is sleeved on the outer wall of the upper sealing pipe, the top end edge of the upper sealing ring is relatively fixed with the upper sealing pipe in a sealing manner, and the bottom end edge of the upper sealing ring is fixed with the top end edge of the liner pipe in a sealing manner;
the top end of the lower sealing pipe is slidably sleeved on the inner side of the bottom end of the liner pipe;
the lower sealing ring is sleeved on the outer wall of the lower sealing pipe, the bottom end edge of the lower sealing ring is fixed to the lower sealing pipe in a sealing mode, and the top end edge of the lower sealing ring is fixed to the bottom end edge of the liner pipe in a sealing mode;
the bottom end of the lower sealing pipe is slidably sleeved on the outer wall of the top end of the slip seat;
the bottom of the slip seat is provided with a first boss;
the outer wall of the bottom of the lower sealing pipe is provided with a plurality of inclined plane bulges in a surrounding manner, and the diameter of the top ends of the inclined plane bulges is larger than that of the bottom ends of the inclined plane bulges;
a positioning slip is arranged on the outer wall of the inclined plane protrusion, the inner wall of the positioning slip is of a sliding matching structure with the inclined plane protrusion, and the bottom end of the positioning slip is in contact matching with the first boss;
the bottom end of the slip seat is detachably connected with the shearing disc.
Furthermore, the upper sealing pipe is provided with a second boss, and the top edge of the upper sealing ring is fixed with the second boss in a sealing mode.
Further, the top end edge of the upper sealing ring is welded with the second boss.
Furthermore, the lower sealing pipe is provided with a boss III, and the bottom edge of the lower sealing ring is oppositely fixed with the boss in a sealing manner.
Further, the bottom edge of the lower sealing ring is welded with the boss III.
Further, the positioning slips are tooth slips.
Further, the shearing disc comprises a sleeve, an integrally arranged shearing ring is arranged on the inner wall of the sleeve, and the inner side of the top end of the sleeve is in threaded matching connection with the bottom end of the slip seat.
Further, the lower sealing pipe is connected with the slip seat through an assembling shear pin.
Furthermore, the side wall of the lower sealing pipe is also provided with a positioning shear pin, and the initial position of the positioning shear pin is located at the top end of the inclined plane protrusion.
Furthermore, the upper sealing ring and the lower sealing ring are both temperature-resistant corrosion-resistant plastic metal sealing rings.
According to the technical scheme, compared with the prior art, the oil well casing leakage repair lining pipe has the following beneficial effects:
the bushing pipe device for bushing leakage repair disclosed by the invention is placed at a bushing leakage perforation when in use, the leakage point is sealed and isolated by utilizing the plasticity of the temperature-resistant corrosion-resistant plastic metal sealing ring, the operation is simple and efficient, the repair success rate is high, the cost is low, the service life after repair is long, and the bushing pipe device has remarkable economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a view showing an overall structure of a leakage repairing liner for an oil well casing according to the present invention;
FIG. 2 is a view showing an assembly structure of a leakage repairing liner for an oil well casing according to the present invention;
FIG. 3 is a view showing a working condition structure of the leakage repairing lining pipe of the oil well casing according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following embodiments, "upper", "lower", and the like are described in a relative relationship and do not represent any orientation limitation.
Example 1
As shown in the attached drawings 1-3, the leakage repairing lining pipe for the oil well casing comprises an upper sealing pipe 1, an upper sealing ring 2, a lining pipe 3, a lower sealing pipe 4, a lower sealing ring 5, a positioning slip 6, a slip seat 7 and a shearing disc 8;
the bottom end of the upper sealing pipe 1 is slidably sleeved on the inner side of the top end of the liner pipe 3;
the upper sealing ring 2 is sleeved on the outer wall of the upper sealing pipe 1, the upper sealing pipe 1 is provided with a second boss 11, the top end edge of the upper sealing ring 2 is fixed with the second boss 11 in a sealing mode, and the bottom end edge is fixed with the top end edge of the liner pipe 3 in a sealing mode;
the top end of the lower sealing pipe 4 is slidably sleeved on the inner side of the bottom end of the liner pipe 3;
the lower sealing ring 5 is sleeved on the outer wall of the lower sealing pipe 4, the lower sealing pipe 4 is provided with a boss III 41, the bottom end edge of the lower sealing ring 5 is fixed with the boss III 51 in a sealing mode, and the top end edge is fixed with the bottom end edge of the liner pipe 3 in a sealing mode;
the bottom end of the lower sealing pipe 4 is slidably sleeved on the outer wall of the top end of the slip seat 7 and is connected through an assembling shear pin 9;
the bottom of the slip seat 7 is provided with a first boss;
the outer wall of the bottom of the lower sealing tube 4 is provided with a plurality of inclined plane bulges 42 in a surrounding manner, the top diameters of the inclined plane bulges 42 are larger than the diameters of the bottom ends, and the inclined plane bulges 42 are a plurality of centrosymmetric independent individuals uniformly distributed on the outer wall of the lower sealing tube 4 or are of an annular integral structure.
The outer wall of the inclined plane bulge 42 is provided with a positioning slip 6, the inner wall of the positioning slip 6 is in a sliding matching structure with the inclined plane bulge 42, and the bottom end of the positioning slip 6 is in contact matching with the first boss;
the bottom end of the slip seat 7 is detachably connected with the shearing disc 8, the shearing disc 8 comprises a sleeve 81, the inner wall of the sleeve 81 is provided with an integrally arranged shearing ring 82, and the inner side of the top end of the sleeve 81 is connected with the bottom end of the slip seat 7 in a matching manner through threads;
the upper sealing ring 2 and the lower sealing ring 5 are both temperature-resistant corrosion-resistant plastic metal sealing rings.
The principle of the technical scheme is as follows: when the leakage repairing work is carried out, the oil well casing leakage repairing lining pipe is integrally sleeved outside the tension hydraulic cylinder and is put into the underground casing to the position needing leakage repairing (shown in figure 2, the opening of the side wall is the damaged position of the casing), the bottom end of the tension hydraulic cylinder is abutted against the bottom surface of the shearing ring 82 of the shearing disc 8, the tension hydraulic cylinder contracts to generate tension, under the action of the tension, the slip seat 7 and the lower sealing pipe 4 have the trend of relative displacement, after the shearing nail 9 is assembled and disconnected under the action of force, the slip seat 7 and the lower sealing pipe 4 relatively displace and drive the positioning slip 6 to move along the inclined plane bulge 42, under the expansion action of the inclined plane bulge 42, the positioning slip 6 expands to be attached to the inner wall of the casing and then clamped on the inner wall of the oil well casing (shown in figure 3), at the moment, the position of the liner pipe 3 is anchored at the designed position of the casing, and the position of, and then the tension hydraulic cylinder continues to contract to generate tension, the upper sealing pipe 1 and the lower sealing pipe 4 move oppositely, the upper sealing ring 2 and the lower sealing ring 5 are enabled to generate plastic deformation and bulge by extrusion force, then the upper sealing ring and the lower sealing ring are tightly attached to the inner wall of the oil well casing, the upper sealing ring 2 and the lower sealing ring 5 form two annular sealing strips, a sealing space (shown in an attached drawing 3) is formed by the two annular sealing strips and the liner pipe 3, an old oil well is corroded, perforated and sealed (shown in the attached drawing 3), and the purpose of leakage repairing of the oil well casing is achieved. Then the pulling force hydraulic cylinder continues to contract to generate pulling force, under the action of strong pulling force, the shearing ring 82 of the shearing disc 8 is disconnected, and the pulling force hydraulic cylinder can be lifted out of the well mouth after losing the blocking effect of the shearing ring 82, so that the plugging operation is completed.
In some specific technical schemes, the top end edge of the upper sealing ring 2 is welded with the second boss 11.
In some specific technical schemes, the edge of the bottom end of the lower sealing ring 3 is welded with a boss three 41.
The effect and principle of the technical scheme are as follows: the welding operation is simple and convenient, the cost is low and the sealing effect is good.
In some specific embodiments, the positioning slips 6 are toothed positioning slips.
The effect and principle of the technical scheme are as follows: the slip with the teeth can prevent the slip and the sleeve from sliding relatively, so that the positioning is more accurate.
In some specific technical solutions, the sidewall of the lower sealing tube 4 is further provided with a positioning shear pin 43, and an initial position of the positioning shear pin 43 is located at the top end of the inclined plane protrusion 42.
The effect and principle of the technical scheme are as follows: the positioning of the locating shear pin 43 facilitates accurate positioning during assembly.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The leakage-repairing lining pipe for the oil well casing is characterized by comprising an upper sealing pipe, an upper sealing ring, a lining pipe, a lower sealing ring, a positioning slip, a slip seat and a shearing disc;
the bottom end of the upper sealing pipe is slidably sleeved on the inner side of the top end of the liner pipe;
the upper sealing ring is sleeved on the outer wall of the upper sealing pipe, the top end edge of the upper sealing ring is relatively fixed with the upper sealing pipe in a sealing manner, and the bottom end edge of the upper sealing ring is fixed with the top end edge of the liner pipe in a sealing manner;
the top end of the lower sealing pipe is slidably sleeved on the inner side of the bottom end of the liner pipe;
the lower sealing ring is sleeved on the outer wall of the lower sealing pipe, the bottom end edge of the lower sealing ring is fixed to the lower sealing pipe in a sealing mode, and the top end edge of the lower sealing ring is fixed to the bottom end edge of the liner pipe in a sealing mode;
the bottom end of the lower sealing pipe is slidably sleeved on the outer wall of the top end of the slip seat;
the bottom of the slip seat is provided with a first boss;
the outer wall of the bottom of the lower sealing pipe is provided with a plurality of inclined plane bulges in a surrounding manner, and the diameter of the top ends of the inclined plane bulges is larger than that of the bottom ends of the inclined plane bulges;
a positioning slip is arranged on the outer wall of the inclined plane protrusion, the inner wall of the positioning slip is of a sliding matching structure with the inclined plane protrusion, and the bottom end of the positioning slip is in contact matching with the first boss;
the bottom end of the slip seat is detachably connected with the shearing disc.
2. The oil well casing leakage repair liner according to claim 1, wherein the upper seal pipe has a second boss, and the top edge of the upper seal ring is sealingly fixed to the second boss.
3. The oil well casing leakage repair liner according to claim 2, wherein the top edge of the upper sealing ring is welded to the second boss.
4. The oil well casing leakage repair liner according to claim 1, wherein the lower seal pipe has a third boss, and the bottom edge of the lower seal ring is sealingly fixed to the third boss.
5. The oil well casing leakage repair liner according to claim 4, wherein the bottom edge of the lower seal ring is welded to the boss III.
6. The oil well casing leakage repair liner of claim 1, wherein the positioning slips are tooth slips.
7. The oil well casing leakage repair liner according to claim 1, wherein the shear disk comprises a casing having an integral shear ring disposed on an inner wall thereof, and wherein an inner side of a top end of the casing is threadedly engaged with a bottom end of the slip bowl.
8. The oil well casing leakage repair liner pipe of claim 1, wherein said lower seal pipe and said slip bowl are connected by a fitting shear pin.
9. The oil well casing leakage repair liner pipe as claimed in claim 1, wherein the side wall of the lower seal pipe is further provided with a positioning shear pin, and the initial position of the positioning shear pin is located at the top end of the inclined plane protrusion.
10. The oil well casing leakage repair liner according to claim 1, wherein the upper seal ring and the lower seal ring are both temperature-resistant corrosion-resistant plastic metal seal rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110208076.3A CN112555564A (en) | 2021-02-25 | 2021-02-25 | Leakage-repairing lining pipe for oil well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110208076.3A CN112555564A (en) | 2021-02-25 | 2021-02-25 | Leakage-repairing lining pipe for oil well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112555564A true CN112555564A (en) | 2021-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110208076.3A Pending CN112555564A (en) | 2021-02-25 | 2021-02-25 | Leakage-repairing lining pipe for oil well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112555564A (en) |
Citations (19)
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| US1471184A (en) * | 1920-08-13 | 1923-10-16 | Miles Arthur | Means for repairing tubes |
| US2500601A (en) * | 1945-01-26 | 1950-03-14 | Diamond Alkali Co | Pipe sealer |
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| US2731041A (en) * | 1952-06-18 | 1956-01-17 | Mueller Co | By-pass assembly for service pipes |
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| CN202483512U (en) * | 2011-12-30 | 2012-10-10 | 中国石油天然气股份有限公司 | Mechanical shifting valve |
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| CN203685114U (en) * | 2014-01-24 | 2014-07-02 | 李延青 | Oil recovery packer |
| CN203891847U (en) * | 2014-06-06 | 2014-10-22 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Deep atomization drainage and gas recovery device easy to salvage |
| CN109519146A (en) * | 2018-12-26 | 2019-03-26 | 四川长宁天然气开发有限责任公司 | A kind of solvable bridge plug of small size |
| CN110864173A (en) * | 2019-11-01 | 2020-03-06 | 上海誉亿建筑安装工程有限公司 | Natural gas conveying pipeline joint structure and construction process thereof |
-
2021
- 2021-02-25 CN CN202110208076.3A patent/CN112555564A/en active Pending
Patent Citations (19)
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| US1471184A (en) * | 1920-08-13 | 1923-10-16 | Miles Arthur | Means for repairing tubes |
| US2500601A (en) * | 1945-01-26 | 1950-03-14 | Diamond Alkali Co | Pipe sealer |
| US2543954A (en) * | 1948-12-11 | 1951-03-06 | Mcrlin E Barber | Compression by-pass and wrench device |
| US2731041A (en) * | 1952-06-18 | 1956-01-17 | Mueller Co | By-pass assembly for service pipes |
| US2756779A (en) * | 1952-06-18 | 1956-07-31 | Mueller Co | By-pass assembly for service pipe and method of installation |
| US2784627A (en) * | 1952-06-18 | 1957-03-12 | Mueller Co | By-pass assembly for service pipes and wrench for installation of the same |
| US3696447A (en) * | 1970-04-02 | 1972-10-10 | Ernest M Mckown | Leak sealing device |
| US4377945A (en) * | 1978-10-30 | 1983-03-29 | Giovanni Bernard A Di | Service line interior by-pass |
| CN1158156A (en) * | 1995-07-19 | 1997-08-27 | Gec阿尔松·斯坦工业公司 | Device sealably connectable to at least one cylindrical element |
| CN2345686Y (en) * | 1998-01-13 | 1999-10-27 | 辽河石油勘探局井下作业公司 | Retrievable bridging plug |
| DK1173655T3 (en) * | 1999-04-30 | 2006-05-08 | Thru Tubing Technology Inc | Rib reinforced sealing member and methods of use |
| CN201424934Y (en) * | 2009-06-08 | 2010-03-17 | 辽河石油勘探局 | Hydraulic releasing cement squeezing tool |
| CN202176307U (en) * | 2011-08-02 | 2012-03-28 | 盘锦鑫富远石油机械厂 | Thermal recovery packer |
| CN202483512U (en) * | 2011-12-30 | 2012-10-10 | 中国石油天然气股份有限公司 | Mechanical shifting valve |
| CN203570259U (en) * | 2013-08-16 | 2014-04-30 | 深圳市百勤石油技术有限公司 | Anchoring packer |
| CN203685114U (en) * | 2014-01-24 | 2014-07-02 | 李延青 | Oil recovery packer |
| CN203891847U (en) * | 2014-06-06 | 2014-10-22 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Deep atomization drainage and gas recovery device easy to salvage |
| CN109519146A (en) * | 2018-12-26 | 2019-03-26 | 四川长宁天然气开发有限责任公司 | A kind of solvable bridge plug of small size |
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Application publication date: 20210326 |
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| RJ01 | Rejection of invention patent application after publication |