CN114718501A - Quick casing tie-back sealing device and operation method thereof - Google Patents
Quick casing tie-back sealing device and operation method thereof Download PDFInfo
- Publication number
- CN114718501A CN114718501A CN202210333419.3A CN202210333419A CN114718501A CN 114718501 A CN114718501 A CN 114718501A CN 202210333419 A CN202210333419 A CN 202210333419A CN 114718501 A CN114718501 A CN 114718501A
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- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- 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
- E21B17/08—Casing joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a quick tieback sealing device for a casing and an operation method thereof, wherein the device comprises a top joint, a lower joint, a guide shoe and a spiral slip; the method is simple to operate, and the operation timeliness is improved; the stopping teeth can ensure the continuous pressurization of the piston and ensure the firmness of the tieback part; the holding range of the spiral slips is 9-12 mm, and the deformation adaptability of the tie-back casing is high; the lead ring and the rubber seal can be effectively attached to the outer wall of the sleeve, and the small-range deformation part of the sleeve can be sealed; the baffle ring is provided with a pressure transmission hole, so that pressure can be transmitted to an annular space between the lead ring and the rubber seal; the pressure test can be carried out on the interface after the tie-back, thereby ensuring the tie-back quality.
Description
Technical Field
The invention belongs to the technical field of offshore oil downhole operation, and particularly relates to a quick casing tie-back sealing device and an operation method thereof.
Background
With the upgrade of domestic safety and environmental protection management, the technical requirements for rapidly plugging and recovering the integrity of a shaft after an offshore oil and gas well is higher and higher. At present, aiming at the damage of a casing at a wellhead area, the lower part of the damaged part of the casing needs to be cut, and then operations such as casing tie-back sealing, wellhead device installation and the like are carried out. However, the damaged position of the casing is random, the distance between the cutting opening and the next coupling is long or short, the cement in the annular space is extremely difficult to treat, the requirement of quickly recovering the integrity of the shaft cannot be met, and the pressure test on the opening cannot be timely carried out after the back connection.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a quick casing tie-back sealing device and an operation method thereof.
The invention is realized by the following technical scheme:
a quick tieback sealing device for a casing comprises a top joint, a lower joint, a guide shoe and a spiral slip;
the lower end of the top joint is connected with the lower joint through threads, a limiting step is formed on the inner wall of the top joint, a groove is formed on the inner wall of the top joint, a lead ring, a baffle ring, a rubber seal and a piston are sequentially arranged in the groove from top to bottom, a stopping tooth is arranged on the inner wall of the top joint at the position of the groove, and a seat hole is formed in the cylinder wall of the top joint beside a piston packing;
the lower end of the lower joint is connected with a guide shoe through threads, and a spiral slip is connected inside the lower joint;
in the technical scheme, the upper part of the top connector is provided with a casing thread for connecting with a casing.
In the technical scheme, the outer part of the spiral slip is provided with wide sawtooth left-handed threads, the inner grasping teeth are provided with multi-start left-handed sawtooth threads, and the lower part of the spiral slip is welded with a finger-shaped key which is used for being matched with the control card to prevent the slip from rotating.
In the technical scheme, a pressure test hole is formed in the cylinder wall of the top connector at the rubber sealing installation position.
In the above technical scheme, the baffle ring is provided with a pressure transmission hole.
The operation method of the quick tieback sealing device for the casing comprises the following steps:
step one, lowering the tool to a cut sleeve cutting opening, introducing the sleeve into the tool through a guide shoe, lowering the pipe column until the sleeve cutting opening contacts a limiting step, lifting the pipe column, confirming that a spiral slip grasps the sleeve, and lowering the pipe column to a neutral point;
connecting the hand pump to a seat hole, pushing the piston by pressing, pushing the rubber seal and the baffle ring to extrude the lead ring by the piston, continuously extruding the rubber seal by the baffle ring to complete expansion sealing after the lead ring achieves the expansion sealing effect, locking the piston by the stopping teeth after the seat sealing is finished, and continuously extruding the lead ring and the rubber seal without generating relative motion; releasing the pressure, detaching the hand pump, and installing a blind plug in the setting hole;
and step three, connecting the hand pump to the pressure test hole, testing the pressure of the annular space between the lead ring and the rubber seal by pressing, ensuring the effectiveness of the two seals, releasing the pressure after the pressure test is finished, disassembling the hand pump, and installing the pressure test hole in a blind manner.
The invention has the beneficial effects that:
firstly, the operation is simple, and the operation timeliness is improved.
And secondly, the stopping teeth can ensure that the piston continuously pressurizes and ensure the firmness of the tie-back part.
And thirdly, the holding range of the spiral slips is 9-12 mm, and the deformation adaptability of the tie-back casing is high.
And fourthly, the lead ring and the rubber seal can be effectively attached to the outer wall of the sleeve, and the deformation part of the sleeve in a small range can be sealed.
And fifthly, the baffle ring is provided with a pressure transmission hole, so that the pressure can be transmitted to an annular space between the lead ring and the rubber seal.
And sixthly, the pressure test can be carried out on the interface after the tie-back, so that the tie-back quality is ensured.
Drawings
Fig. 1 is a full sectional view of a quick tieback seal for a casing.
Fig. 2 is a full sectional view of the quick casing tie-back sealing device after tie-back.
Wherein: 1. a thread; 2. a tool centerline; 3. a top joint; 4. a limiting step; 5. a lead ring; 6. a baffle ring; 7. sealing with rubber; 8. a piston; 9. a piston packing; 10. setting holes; 11. a lower joint; 12. a spiral slip; 13. a control card; 14. guiding shoes; 15. stopping teeth; 16. and (5) pressure testing holes.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical scheme of the invention is further explained by combining specific examples.
Examples
Referring to fig. 1, the quick tieback sealing device for the casing comprises a casing thread 1, a top connector 3, a limiting step 4, a lead ring 5, a baffle ring 6, a rubber seal 7, a piston 8, a piston packing 9, a setting hole 10, a lower connector 11, a spiral slip 12, a control card 13, a guide shoe 14, a stopping tooth 15, a pressure test hole 16 and the like.
The upper part of the top connector 3 is provided with a sleeve thread for connecting with a sleeve; the lower part is provided with threads and is used for connecting with a lower joint 11; the inner part is provided with a limiting step 4 and a groove for placing a lead ring 5, a baffle ring 6, a rubber seal 7 and a piston 8. And the limiting step 4 is used for limiting the upward movement of the sleeve. And the lead ring 5 is used for sealing the inner wall of the top connector 3 and the outer wall of the sleeve to prevent the pressure in the sleeve from escaping. And the baffle ring 6 is used for transmitting thrust to extrude the lead ring 5 and the rubber seal 7. And the rubber seal 7 is used for sealing the inner wall of the top connector 3 and the outer wall of the sleeve to prevent the pressure in the sleeve from escaping. And the piston 8 is used for extruding the lead ring 5 and the rubber seal 7. And the piston packing 9 is used for sealing the piston 8 and the inner wall of the top joint 3 and ensuring that hydraulic pressure acts on the piston surface. And the seating hole 10 is used for pressing and pushing the outer wall of the sealing sleeve of the piston 8 and the inner wall of the top connector 3. The upper part of the lower joint 11 is provided with threads and is used for being connected with the top joint 3; the lower part is provided with threads for connecting the guide shoe 14; internally threaded to cooperate with the screw slips 12 for securing the casing. The outer part of the spiral slip 12 is a wide sawtooth left-handed thread which is matched with the inner thread of the lower joint 11; the internal grasping teeth are multi-head left-handed sawtooth-shaped screw teeth and are used for fixing the sleeve; finger keys are welded on the lower part and are used for matching with the control card 13 to prevent the slips from rotating. And the control card 13 is used for fixing the spiral slips 12 and preventing the slips from rotating. The guide shoe 14 is used to guide the top of the casing into the tieback seal. The retaining teeth 15 are used for preventing the piston 8 from moving downwards. And the pressure test hole 16 is used for testing the sealing property between the lead ring 5 and the rubber seal 7.
The working principle of the invention is as follows:
taking a tie-back wellhead casing as an example, the tool is lowered to a cutting opening of the cutting casing, the casing is introduced into the tool through the guide shoe 14, the pipe string is lowered until the cutting opening of the casing contacts the limiting step 4, the pipe string is lifted, the spiral slips 12 are confirmed to grasp the casing, and the pipe string is lowered to a neutral point. Connect the hand pump to sit and seal hole 10, promote piston 8 through suppressing, piston 8 promotes rubber seal 7 and keeps off ring 6 extrusion lead ring 5, keeps off ring 6 and continues to extrude rubber seal 7 and accomplish the expand sealing after lead ring 5 reaches the expand sealing effect, sits and seals the back that finishes, and piston 8 receives stopping tooth 15 to lock, no longer produces relative motion, continues to extrude lead ring 5 and rubber seal 7. And releasing the pressure, detaching the hand pump and installing the blind plug in the setting hole. Connecting the hand pump to the pressure test hole, carrying out pressure test on the annular space between the lead ring 5 and the rubber seal 7 by pressing, ensuring the effectiveness of two seals, releasing pressure after the pressure test is finished, detaching the hand pump, and installing the pressure test hole for blind plugging.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (6)
1. The utility model provides a quick tieback sealing device of sleeve pipe which characterized in that: comprises a top joint, a lower joint, a guide shoe and a spiral slip;
the lower end of the top joint is connected with the lower joint through threads, a limiting step is formed on the inner wall of the top joint, a groove is formed on the inner wall of the top joint, a lead ring, a baffle ring, a rubber seal and a piston are sequentially arranged in the groove from top to bottom, a stopping tooth is arranged on the inner wall of the top joint at the position of the groove, and a seat hole is formed in the cylinder wall of the top joint beside a piston packing;
the lower end of the lower joint is connected with a guide shoe through threads, and a spiral slip is connected inside the lower joint.
2. The quick casing tieback seal of claim 1, wherein: and the upper part of the top connector is provided with a sleeve thread for connecting with a sleeve.
3. The quick tieback seal of a casing as claimed in claim 1, wherein: the outer part of the spiral slip is provided with wide sawtooth left-hand threads, the inner grasping teeth are multi-head left-hand sawtooth threads, and finger-shaped keys are welded at the lower part of the spiral slip and used for being matched with the control card to prevent the slip from rotating.
4. The quick tieback seal of a casing as claimed in claim 1, wherein: and a pressure test hole is formed in the cylinder wall of the top connector at the rubber sealing installation position.
5. The quick tieback seal of a casing as claimed in claim 1, wherein: and the baffle ring is provided with a pressure transmission hole.
6. An operation method of a quick casing tie-back sealing device is characterized in that:
step one, placing the tool to a cutting opening of a cutting casing, introducing the casing into the tool through a guide shoe, placing a pipe column until the cutting opening of the casing contacts a limiting step, lifting the pipe column, confirming that a spiral slip grabs the casing, and placing the pipe column to a neutral point;
connecting a hand pump to the hole sealing hole, pushing a piston through pressing, pushing a rubber seal and a baffle ring to extrude a lead ring by the piston, continuously extruding the rubber seal by the baffle ring after the lead ring achieves the expansion sealing effect to complete the expansion sealing, locking the piston by a retaining tooth after the setting is finished, and continuously extruding the lead ring and the rubber seal without generating relative motion; releasing the pressure, detaching the hand pump, and installing a blind plug in the setting hole;
and step three, connecting the hand pump to the pressure test hole, testing the pressure of the annular space between the lead ring and the rubber seal by pressing, ensuring the effectiveness of the two seals, releasing the pressure after the pressure test is finished, disassembling the hand pump, and installing the pressure test hole in a blind manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333419.3A CN114718501B (en) | 2022-03-31 | 2022-03-31 | Quick tieback sealing device for sleeve and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333419.3A CN114718501B (en) | 2022-03-31 | 2022-03-31 | Quick tieback sealing device for sleeve and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114718501A true CN114718501A (en) | 2022-07-08 |
| CN114718501B CN114718501B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210333419.3A Active CN114718501B (en) | 2022-03-31 | 2022-03-31 | Quick tieback sealing device for sleeve and operation method thereof |
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4465134A (en) * | 1982-07-26 | 1984-08-14 | Hughes Tool Company | Tie-back connection apparatus and method |
| US6142230A (en) * | 1996-11-14 | 2000-11-07 | Weatherford/Lamb, Inc. | Wellbore tubular patch system |
| CN2450659Y (en) * | 2000-09-21 | 2001-09-26 | 张绍喜 | Multifunctional instrument checking apparatus |
| CN2464926Y (en) * | 2000-05-30 | 2001-12-12 | 中国通化石油工具股份有限公司 | Lead seal cement pouring sleeve joint |
| US20020040787A1 (en) * | 1998-12-07 | 2002-04-11 | Cook Robert Lance | Forming a wellbore casing while simultaneously drilling a wellbore |
| US6554062B1 (en) * | 1999-05-19 | 2003-04-29 | Smith International, Inc. | Anchor apparatus and method |
| CN101666215A (en) * | 2009-09-30 | 2010-03-10 | 安东石油技术（集团）有限公司 | Sleeve pipe tieback device |
| CN201650179U (en) * | 2009-12-18 | 2010-11-24 | 贵州高峰石油机械股份有限公司 | Packer type sleeve repairing and connecting device with spiral slip |
| CN102042935A (en) * | 2010-10-29 | 2011-05-04 | 马利芳 | Method for detecting hydrostatic pressure of thin-wall steel pipe under end face seal condition |
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| CN114198042A (en) * | 2021-07-26 | 2022-03-18 | 中海油能源发展股份有限公司 | Ball throwing type cutting and fishing integrated tool and using method thereof |
-
2022
- 2022-03-31 CN CN202210333419.3A patent/CN114718501B/en active Active
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| US6142230A (en) * | 1996-11-14 | 2000-11-07 | Weatherford/Lamb, Inc. | Wellbore tubular patch system |
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| US6554062B1 (en) * | 1999-05-19 | 2003-04-29 | Smith International, Inc. | Anchor apparatus and method |
| CN2464926Y (en) * | 2000-05-30 | 2001-12-12 | 中国通化石油工具股份有限公司 | Lead seal cement pouring sleeve joint |
| CN2450659Y (en) * | 2000-09-21 | 2001-09-26 | 张绍喜 | Multifunctional instrument checking apparatus |
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| CN215860068U (en) * | 2021-08-19 | 2022-02-18 | 胜利油田中利石油工程技术有限公司 | Pressure testing type casing pipe patching device |
| CN113803013A (en) * | 2021-08-30 | 2021-12-17 | 贵州高峰石油机械股份有限公司 | Easy-to-introduce lead-removable oil seal casing pipe patching device |
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| Title |
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| 杨春和;张春明;习玉光;宋学英;孙庆仁;: "套管修复的多功能膨胀技术", 国外油田工程, vol. 24, no. 04, pages 24 - 27 * |
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| Publication number | Publication date |
|---|---|
| CN114718501B (en) | 2023-07-28 |
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