CN102777139B - Method for downhole coat transferring - Google Patents
Method for downhole coat transferring Download PDFInfo
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- CN102777139B CN102777139B CN201210252864.3A CN201210252864A CN102777139B CN 102777139 B CN102777139 B CN 102777139B CN 201210252864 A CN201210252864 A CN 201210252864A CN 102777139 B CN102777139 B CN 102777139B
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- bridge plug
- hydraulic
- slide sleeve
- circulation
- pressure bridge
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Abstract
The invention provides a method for downhole coat transferring. The method includes steps of firstly, performing mud lubrication until stability; secondly, placing a hydraulic bridge plug tubular column and disposing a circulating slide sleeve which is provided with an openable fluid flow passage connecting to interior of the tubular column and a tubular column annulus on a string above the bridge plug; thirdly, seat sealing the hydraulic bridge plug and releasing; fourthly, probing the hydraulic bridge plug surface; fifthly, removing a blowout preventer and mounting a Christmas tree; sixthly, opening the fluid flow passage of the circulating slide sleeve; seventhly, performing mud replacing and well washing by the aid of connection of the fluid flow passage and the interior of the tubular column and the tubular column annulus; and eighthly, testing and qualifying the hydraulic bridge plug. By the method, the problem of multiple tripping operations is solved, construction cycle is shortened, and production efficiency and product quality are improved. The method is widely applicable to various coat sealing operations in well constructions, simple in principles, practical, high in adaptability, high in popularization value and application value and the like.
Description
Technical field
The present invention relates to oil and gas exploration and development field, specifically a kind of down-hole turns the method for layer operation.
Background technology
As shown in Figure 1, turn in layer operation in the construction of down-hole sealing, concrete steps are as follows: 1, adopt mud lubrication to steady; 2, oil pipe 2 tubing string of hydraulic-pressure bridge plug 3 under group in sleeve pipe 1; 3, setting hydraulic-pressure bridge plug 3; 4, visit hydraulic-pressure bridge plug 3 and fill in face; 5, the oil pipe 2 pipe string of hydraulic-pressure bridge plug 3 in well is played; 6, in sleeve pipe 1 again under group for washing and starching well casing string; 7, for washing and starching well; 8, qualified to hydraulic-pressure bridge plug 3 pressure testing.Because, after the setting hydraulic-pressure bridge plug 3 of successful implementation is given up, the latus rectum of its releasing device is only 30mm, in order to avoid occurring in for washing and starching in well construction process releasing device by the phenomenon of stinging leakage, take step 5 and propose pipe string in well, step 6 again under group for the way of blank tubing pipe string of washing and starching well.At present, the well of more than 80% has all carried out mud lubrication in early stage, generally all piling up a large amount of mud, now all needing to carry out for washing and starching well operations in sleeve 1 under group during hydraulic-pressure bridge plug 3, in sleeve pipe 1.But, which need to transfer for twice and on carry pipe string in well, not only working procedure is complicated, the cycle is longer, and cost is higher, wastes a large amount of manpower and materials, has well control safety risk., easily precipitate because mud in well can not circulate for a long time meanwhile, cause the generation of well control safety risk and construction complex situations.
Summary of the invention
The object of the invention is to: provide a kind of highly effective and safe, once group pipe can complete the method that whole down-hole turns layer operation.
The technical solution adopted in the present invention is:
Down-hole turns a method for layer operation, and concrete steps are:
(1) adopt mud lubrication to steady;
(2) the lower hydraulic-pressure bridge plug tubing string of group, the pipe string above hydraulic-pressure bridge plug is arranged a circulation slide sleeve, and this circulation slide sleeve has can the fluid passage of folding, and this fluid passage connects the inner and tubing annulus of tubing string;
(3) setting hydraulic-pressure bridge plug, operation of giving up;
(4) hydraulic-pressure bridge plug plug face is visited;
(5) tear preventer open, production tree is installed;
(6) circulation slide sleeve fluid passage is opened;
(7) the inner and tubing annulus of tubing string is connected, for washing and starching well by fluid passage;
(8) qualified to hydraulic-pressure bridge plug pressure testing.
Described circulation slide sleeve is connected between pipe string and hydraulic-pressure bridge plug by tubing nipple.
Described circulation slide sleeve comprises overcoat and core retainer plate, and described overcoat two ends are fixedly connected with pipe string, side face is provided with circulation port; Core retainer plate laminating outer casing inner wall, covering circulation port are arranged, and core retainer plate is connected on outer casing inner wall by cutting off pin.
In described step (6), stretching into circulation slide sleeve inside by pushing device, holding out against core retainer plate front end, apply external force and make to cut off that pin fractures, core retainer plate slide downward, open the outer circulation port put.
The beneficial effect that the present invention produces is:
Down-hole of the present invention turns a layer operational method, hydraulic-pressure bridge plug pipe string upper design circulation canal under group, carrying out for washing and starching well operations with timely open sliding sleeve, carrying out immediately for washing and starching well operations after hydraulic-pressure bridge plug success is setting, reducing the well mud static time of staying.The present invention successfully solves a difficult problem for multiple trips, reduce the mud static time of staying in the wellbore, avoid the generation causing the well control safety risks such as precipitation card bury drills and construction complex situations because mud can not circulate for a long time, shorten construction period, improve production timeliness and quality of achievement.Can be used widely in the operation of every construction well sealing, have the advantages such as operating principle is simple, practical, applicability is strong, has wide application value.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art down-hole when turning layer operation;
Fig. 2 is the structural representation of down-hole of the present invention when turning layer operation;
Fig. 3 is the structural representation of circulation slide sleeve of the present invention;
Fig. 4 is the sectional structure schematic diagram of circulation slide sleeve of the present invention;
Number in the figure represents: 1-sleeve pipe, 2-oil pipe, 3-hydraulic-pressure bridge plug, 4-circulation slide sleeve, 5-overcoat, 6-circulation port, 7-cut off pin, 8-core retainer plate, a-top connection, b-lower contact.
Detailed description of the invention
As shown in figures 2-3, the present invention is a kind of method that down-hole turns layer operation, first to adopting the sealing pipe string of hydraulic-pressure bridge plug 3 under 2 groups, oil pipe to be optimized, particularly utilizing on tubing nipple, pipe string above hydraulic-pressure bridge plug 3 and arranging a circulation slide sleeve 4.This circulation slide sleeve 4 has can the fluid passage of folding, when this fluid passage is opened, can connect the inside of tubing string 1 and the annular space of tubing string 1.Concrete: circulation slide sleeve 4 contacts with each other by two, is socketed two sleeve pipes be integrated and forms, and specifically overcoat 5 and core retainer plate 8, the two ends of overcoat 5 are provided with top connection a and lower contact b.In this detailed description of the invention: top connection a is the female mouth be arranged on outer casing inner wall, lower contact b is the male mouth be arranged on overcoat 5; The male mouth in lower end of the top connection a connected pipes 2 of overcoat 5, the female mouth in the upper end of lower contact b connected pipes pipe nipple, tubing nipple connects hydraulic-pressure bridge plug 3.Side face is provided with two circulation ports split 6 in the middle part of overcoat 5, core retainer plate 8 fit overcoat 5 inwall install, cover in circulation port 6 completely and arrange, meanwhile, core retainer plate 8 is fixedly connected on the inwall of overcoat 5 by cutting off pin 7.That is, the circulation port 6 on overcoat 5, as the fluid passage of circulation slide sleeve 4, controls it and close and open, and circulation port 6 is closed by the initial position of core retainer plate 8 by core retainer plate 8.
The concrete steps that down-hole of the present invention turns layer operational method are:
(1) adopt mud lubrication to steady; In sleeve pipe 1, inject mud, utilize the deadweight of mud to be pushed down by the gas in reservoir, its state is tended to be steady.
(2) connect circulation slide sleeve 4, tubing nipple and hydraulic-pressure bridge plug 3 from top to bottom, successively by oil pipe 2, form complete tubing string, and the tubing string combined is transferred to the correspondence position in sleeve pipe 1.Now, the fluid passage of circulation slide sleeve 4 is closed, and namely core retainer plate 6 blocks inside the circulation port 6 of overcoat 5.
(3) setting hydraulic-pressure bridge plug 3 operation of giving up accordingly;
(4) visit hydraulic-pressure bridge plug 3 and fill in face;
(5) tear preventer open, production tree is installed;
(6) opening the fluid passage of circulation slide sleeve 4, is operated from oil pipe 2 lowered inside, the device that pushes that stretches into circulation slide sleeve 4 inside by one.Concrete: after making the bottom pushing device hold out against the top of core retainer plate 8, to apply external force, make to cut off pin 7 and fracture instantaneously, thus promote core retainer plate 8 slide downward, open the circulation port 6 on overcoat 4.
(7) connect tubing string 1 inside and tubing string 1 annular space by fluid passage, inject for slurry, well-flushing;
(8) qualified to hydraulic-pressure bridge plug 3 pressure testing.The pressure testing operation of this hydraulic-pressure bridge plug 3 can complete in down-hole, also can complete outside well by upper lifting pipe post.
Claims (3)
1. down-hole turns a method for layer operation, it is characterized in that: concrete steps are:
(1) adopt mud lubrication to steady;
(2) the lower hydraulic-pressure bridge plug tubing string of group, the pipe string above hydraulic-pressure bridge plug is arranged a circulation slide sleeve, and this circulation slide sleeve has can the fluid passage of folding, and this fluid passage connects the inner and tubing annulus of tubing string;
(3) setting hydraulic-pressure bridge plug, operation of giving up;
(4) hydraulic-pressure bridge plug plug face is visited;
(5) tear preventer open, production tree is installed;
(6) stretching into circulation slide sleeve inside by pushing device, holding out against core retainer plate front end, apply external force and make to cut off that pin fractures, core retainer plate slide downward, open the outer circulation port put, thus open the fluid passage of circulation slide sleeve;
(7) the inner and tubing annulus of tubing string is connected, for washing and starching well by fluid passage;
(8) qualified to hydraulic-pressure bridge plug pressure testing.
2. down-hole according to claim 1 turns the method for layer operation, it is characterized in that: described circulation slide sleeve is connected between pipe string and hydraulic-pressure bridge plug by tubing nipple.
3. down-hole according to claim 1 turns the method for layer operation, it is characterized in that: described circulation slide sleeve comprises overcoat and core retainer plate, and described overcoat two ends are fixedly connected with pipe string, side face is provided with circulation port; Core retainer plate laminating outer casing inner wall, covering circulation port are arranged, and core retainer plate is connected on outer casing inner wall by cutting off pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252864.3A CN102777139B (en) | 2012-07-20 | 2012-07-20 | Method for downhole coat transferring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252864.3A CN102777139B (en) | 2012-07-20 | 2012-07-20 | Method for downhole coat transferring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777139A CN102777139A (en) | 2012-11-14 |
| CN102777139B true CN102777139B (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210252864.3A Active CN102777139B (en) | 2012-07-20 | 2012-07-20 | Method for downhole coat transferring |
Country Status (1)
| Country | Link |
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| CN (1) | CN102777139B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11421507B2 (en) | 2020-10-15 | 2022-08-23 | Saudi Arabian Oil Company | Reinforcing wellbores prior to casing and cementing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089980U (en) * | 1991-05-27 | 1991-12-04 | 四川石油管理局川中矿区油气勘探开发研究所 | Underwell device for stake pressing crack acidification well |
| US5509442A (en) * | 1995-03-28 | 1996-04-23 | Claycomb; Jackson R. | Mud saver valve |
| CN1752404A (en) * | 2004-09-20 | 2006-03-29 | 西安益友石油科技有限公司 | Gas well separate layer fracturing and producing integrated well completing pipe string and technique |
| CN201144682Y (en) * | 2008-01-16 | 2008-11-05 | 中国石油化工股份有限公司西南油气分公司工程技术研究院 | Multiple fracturing pipe column for petroleum and gas well |
| WO2010071656A1 (en) * | 2008-12-19 | 2010-06-24 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
| CN202250018U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
-
2012
- 2012-07-20 CN CN201210252864.3A patent/CN102777139B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089980U (en) * | 1991-05-27 | 1991-12-04 | 四川石油管理局川中矿区油气勘探开发研究所 | Underwell device for stake pressing crack acidification well |
| US5509442A (en) * | 1995-03-28 | 1996-04-23 | Claycomb; Jackson R. | Mud saver valve |
| CN1752404A (en) * | 2004-09-20 | 2006-03-29 | 西安益友石油科技有限公司 | Gas well separate layer fracturing and producing integrated well completing pipe string and technique |
| CN201144682Y (en) * | 2008-01-16 | 2008-11-05 | 中国石油化工股份有限公司西南油气分公司工程技术研究院 | Multiple fracturing pipe column for petroleum and gas well |
| WO2010071656A1 (en) * | 2008-12-19 | 2010-06-24 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
| CN202250018U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
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| Publication number | Publication date |
|---|---|
| CN102777139A (en) | 2012-11-14 |
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