CN101148975B - Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof - Google Patents

Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof Download PDF

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Publication number
CN101148975B
CN101148975B CN2007101445303A CN200710144530A CN101148975B CN 101148975 B CN101148975 B CN 101148975B CN 2007101445303 A CN2007101445303 A CN 2007101445303A CN 200710144530 A CN200710144530 A CN 200710144530A CN 101148975 B CN101148975 B CN 101148975B
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China
Prior art keywords
tubing string
drilling rod
unfreezing
tool
milling
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CN2007101445303A
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CN101148975A (en
Inventor
刘合
兰中孝
张国良
艾教银
余龙
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Petrochina Co Ltd
Daqing Oilfield Co Ltd
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Daqing Oilfield Co Ltd
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Abstract

The present invention is jamming eliminating and junk fishing apparatus and process for horizontal well. The jamming eliminating and junk fishing apparatus has one milling tool, one safety joint, one powered boring tool, one slope drill pipe and one heavy wall drill pipe connected successively. The jamming eliminating and junk fishing process includes setting the milling tool to 1-2 m above the fish head, delivering well repairing fluid in the displacement of 0.4-0.6 sq m/min and pump pressure of 10-13 MPa, and initiating the powered boring tool to drive the milling tool. The present invention can eliminate jamming in and fishing junk from horizontal well effectively.

Description

Horizontal well unfreezing fishing device and unfreezing fishing method thereof
Technical field
The present invention relates to a kind of down-hole unfreezing fishing device and unfreezing fishing method thereof.
Background technology
Along with the increase of various operation number of times such as fractured horizontal well, perforation, acidifying, water detection, water blockoff, production logging, disconnected the taking off of blocked portion of various tubing strings or instrument appears unavoidably.Because horizontal well is big at the bending section hole curvature and the particularity of aspect such as the horizontal segment hole angle big (general 90 spend about), when implementing the unfreezing fishing workover treatment, mainly there is following technical difficulty: 1. down-hole fish (being commonly called as of trouble of lost tool in hole, such as tubing string, cable, wire rope, instrument, instrument etc.) be close to the casing wall downside, the fish head is introduced and the finishing difficulty; 2. major diameter rigidity drilling tool has been lowered to relatively difficulty, and the unfreezing fishing method is selected limited; 3. moment of torsion, pulling force and the pressure of the drill transmission loss are big, the unfreezing fishing difficulty; Whether 4. tubing string mill resistance influence is big, drag for to obtain when salvaging a small amount of junk to be difficult for judging; 5. the part oilfield horizontal well is compared characteristics such as having borehole size is little, hole curvature is big, horizontal segment length with other oil field, has bigger limitation and repairs difficulty.Therefore, the renovation technique of the existing straight well of employing can't be realized the reparation to horizontal well.
Summary of the invention
The objective of the invention is to realize unfreezing problem to horizontal well providing a kind of horizontal well unfreezing fishing device and unfreezing fishing method thereof for the renovation technique that solve to adopt existing straight well.Horizontal well unfreezing fishing device of the present invention is made up of combination flooding milling unfreezing tubing string and upside-down mounting jarring releasing fishing process tubing string, described combination flooding milling unfreezing tubing string is by milling tool, safety joint, power drilling tool, first centralizer, straight screw rod, second centralizer, the slope drilling rod, heavy weight drill pipe and drilling rod are formed, described upside-down mounting jarring releasing fishing process tubing string is by fishing tool, the safety joint of tubing string, the first slope drilling rod of tubing string, the heavy weight drill pipe of tubing string, the drilling rod of tubing string, the second slope drilling rod of universal joint and tubing string is formed, one end of milling tool is connected with an end of safety joint, the other end of safety joint is connected with an end of power drilling tool, the other end of power drilling tool is connected with an end of first centralizer, the other end of first centralizer is connected with an end of straight screw rod, the other end of straight screw rod is connected with an end of second centralizer, the other end of second centralizer is connected with the lower end of slope drilling rod, the upper end of slope drilling rod is connected with the lower end of heavy weight drill pipe, the upper end of heavy weight drill pipe is connected with the lower end of drilling rod, one end of fishing tool is connected with an end of the safety joint of tubing string, the other end of the safety joint of tubing string is connected with an end of the first slope drilling rod of tubing string, the other end of the first slope drilling rod of tubing string is connected with an end of universal joint, the other end of universal joint is connected with an end of the second slope drilling rod of tubing string, the other end of the second slope drilling rod of tubing string is connected with an end of the heavy weight drill pipe of tubing string, and the other end of the heavy weight drill pipe of tubing string is connected with the lower end of the drilling rod of tubing string.Horizontal well unfreezing fishing method of the present invention is realized by following steps: at first be lowered to combination flooding milling unfreezing tubing string, milling tool arrives 1~2m place, fish head (trouble of lost tool in hole) top, starts the circulation workover fluid, and the discharge capacity of workover fluid is 0.4~0.6m 3/ min, pump pressure is 10~13Mpa, transfers combination flooding milling unfreezing tubing string gradually to fish head place, until the sand setting on junk (fish head) top is rinsed well, power drilling tool is started working and the milling tool that drives the bottom is started working; Start rotating disk simultaneously drilling rod drive heavy weight drill pipe and slope drilling rod are started working, rotary speed is 20~30r/min, and the pressure of the drill is 10~20KN, and power drilling tool and slope drilling rod drive simultaneously, are compound driving; In boring milling cover process, dispose the fish at blocked portion place, to remove blocked portion, after unfreezing finishes, trip out combination flooding milling unfreezing tubing string, implement again to salvage.
The present invention has following beneficial effect: one, device of the present invention adopts the combination flooding braking technique that power drilling tool and drilling rod drive simultaneously, both can reduce the friction of tubing string to horizontal well casing pipe during unfreezing, has protected sleeve pipe, can improve the operating efficiency of boring the milling cover again.Two, in tubing string, add centralizer and safety joint, preferably resolve the eccentric wear sidetracking and the safety problem of tubing string.Three, method of the present invention is used for horizontal well bending section or horizontal segment and the smallclothes junk is fallen unfreezing, tubing string behind the well jam falls behind the well by the unfreezing behind other smallclothes junk jam or other releasing method last unfreezing measure after invalid, the final unfreezing fishing of realizing horizontal well is blocked junk.
Description of drawings
Fig. 1 is the overall structure schematic diagram of horizontal well unfreezing fishing device of the present invention, and Fig. 2 is the overall structure schematic diagram of upside-down mounting jarring releasing fishing process tubing string in the specific embodiment two.
The specific embodiment
The specific embodiment one: (referring to Fig. 1) present embodiment horizontal well unfreezing fishing device is by milling tool 1, safety joint 2, power drilling tool 3, first centralizer 4, straight screw rod 5, second centralizer 6, slope drilling rod 7, heavy weight drill pipe 8 and drilling rod 9 are formed, one end of milling tool 1 is connected with an end of safety joint 2, the other end of safety joint 2 is connected with an end of power drilling tool 3, the other end of power drilling tool 3 is connected with an end of first centralizer 4, the other end of first centralizer 4 is connected with an end of straight screw rod 5, the other end of straight screw rod 5 is connected with an end of second centralizer 6, the other end of second centralizer 6 is connected with the lower end of slope drilling rod 7, the upper end of slope drilling rod 7 is connected with the lower end of heavy weight drill pipe 8, and the upper end of heavy weight drill pipe 8 is connected with the lower end of drilling rod 9.
The specific embodiment two: (referring to Fig. 1) present embodiment horizontal well unfreezing fishing method is realized by following steps: at first be lowered to combination flooding milling unfreezing tubing string, milling tool 1 arrives 1~2m place, fish head (trouble of lost tool in hole) top, start the circulation workover fluid, the discharge capacity of workover fluid is 0.4~0.6m 3/ min, pump pressure is 10~13Mpa, transfers combination flooding milling unfreezing tubing string gradually to fish head place, until the sand setting on junk (fish head) top is rinsed well, power drilling tool 3 is started working and the milling tool 1 that drives the bottom is started working; Start rotating disk simultaneously drilling rod 9 drive heavy weight drill pipes 8 and slope drilling rod 7 are started working, rotary speed is 20~30r/min, and the pressure of the drill is 10~20KN, and power drilling tool 3 and slope drilling rod 7 drive simultaneously, are compound driving; In boring milling cover process, dispose the fish at blocked portion place, to remove blocked portion, after unfreezing finishes, trip out combination flooding milling unfreezing tubing string, implement again to salvage.Under the situation that can't implement to salvage 1 pair of milling tool by the card fish carry out destructiveness handle (as to cable, wire rope, running string and fall well tool etc. and bore mill, overlap and mill), directly the fish brill is ground off.What the described salvaging of enforcement again was used is upside-down mounting jarring releasing fishing process tubing string (see figure 2), this upside-down mounting jarring releasing fishing process tubing string is by fishing tool 11, the safety joint 12 of tubing string, the first slope drilling rod 13 of tubing string, the heavy weight drill pipe 14 of tubing string, the drilling rod 15 of tubing string, the second slope drilling rod 17 of universal joint 16 and tubing string is formed, one end of fishing tool 11 is connected with an end of the safety joint 12 of tubing string, the other end of the safety joint 12 of tubing string is connected with an end of the first slope drilling rod 13 of tubing string, the other end of the first slope drilling rod 13 of tubing string is connected with an end of universal joint 16, the other end of universal joint 16 is connected with an end of the second slope drilling rod 17 of tubing string, the other end of the second slope drilling rod 17 of tubing string is connected with an end of the heavy weight drill pipe 14 of tubing string, and the other end of the heavy weight drill pipe 14 of tubing string is connected with the lower end of the drilling rod 15 of tubing string.The heavy weight drill pipe 14 of tubing string is placed in the straight well section, the heavy weight drill pipe 14 of tubing string can produce bigger the pressure of the drill to whole tubing string, improve the transmission effect of power by the transfers of tubing string, first slope drilling rod 13 of tubing string and the second slope drilling rod of tubing string 17 times are at horizontal segment and bending section, can effectively prevent the scratching sleeve pipe, arrest fish after upside-down mounting jarring releasing fishing process tubing string is lowered to, junk is pulled out.The principle that also can utilize upside-down mounting jarring releasing fishing process tubing string inverted drill string to be easy to transmit the pressure of the drill is directly carried out jarring until unfreezing to junk, after the unfreezing junk is pulled out.
The specific embodiment three: the discharge capacity of present embodiment workover fluid is 0.5m 3/ min.Other is identical with the specific embodiment two.
The specific embodiment four: the pump pressure of present embodiment is 11.5Mpa.Other is identical with the specific embodiment two.
The specific embodiment five: the rotary speed of present embodiment is 25r/min.Other is identical with the specific embodiment two.
The specific embodiment six: the pressure of the drill of present embodiment is 15KN.Other is identical with the specific embodiment two.

Claims (6)

1. horizontal well unfreezing fishing device, it is made up of combination flooding milling unfreezing tubing string and upside-down mounting jarring releasing fishing process tubing string, described combination flooding milling unfreezing tubing string is by milling tool (1), safety joint (2), power drilling tool (3), first centralizer (4), straight screw rod (5), second centralizer (6), slope drilling rod (7), heavy weight drill pipe (8) and drilling rod (9) are formed, described upside-down mounting jarring releasing fishing process tubing string is by fishing tool (11), the safety joint of tubing string (12), the first slope drilling rod (13) of tubing string, the heavy weight drill pipe of tubing string (14), the drilling rod of tubing string (15), the second slope drilling rod (17) of universal joint (16) and tubing string is formed, an end that it is characterized in that milling tool (1) is connected with an end of safety joint (2), the other end of safety joint (2) is connected with an end of power drilling tool (3), the other end of power drilling tool (3) is connected with an end of first centralizer (4), the other end of first centralizer (4) is connected with an end of straight screw rod (5), the other end of straight screw rod (5) is connected with an end of second centralizer (6), the other end of second centralizer (6) is connected with the lower end of slope drilling rod (7), the upper end of slope drilling rod (7) is connected with the lower end of heavy weight drill pipe (8), the upper end of heavy weight drill pipe (8) is connected with the lower end of drilling rod (9), one end of fishing tool (11) is connected with an end of the safety joint (12) of tubing string, the other end of the safety joint of tubing string (12) is connected with an end of the first slope drilling rod (13) of tubing string, the other end of the first slope drilling rod (13) of tubing string is connected with an end of universal joint (16), the other end of universal joint (16) is connected with an end of the second slope drilling rod (17) of tubing string, the other end of the second slope drilling rod (17) of tubing string is connected with an end of the heavy weight drill pipe (14) of tubing string, and the other end of the heavy weight drill pipe of tubing string (14) is connected with the lower end of the drilling rod (15) of tubing string.
2. a kind of horizontal well unfreezing fishing method of using the device of claim 1 to carry out, it is characterized in that horizontal well unfreezing fishing method is realized by following steps: at first be lowered to combination flooding milling unfreezing tubing string, milling tool (1) arrives fish 1~2m place, top, start the circulation workover fluid, the discharge capacity of workover fluid is 0.4~0.6m 3/ min, pump pressure is 10~13Mpa, transfers combination flooding milling unfreezing tubing string gradually to fish head place, until the sand setting on junk top is rinsed well, power drilling tool (3) is started working and the milling tool (1) that drives the bottom is started working; Start rotating disk simultaneously drilling rod (9) drive heavy weight drill pipe (8) and slope drilling rod (7) are started working, rotary speed is 20~30r/min, and the pressure of the drill is 10~20KN, and power drilling tool (3) and slope drilling rod (7) drive simultaneously, are compound driving; In boring milling cover process, dispose the fish at blocked portion place, to remove blocked portion, after unfreezing finishes, trip out combination flooding milling unfreezing tubing string, implement again to salvage.
3. horizontal well unfreezing fishing method according to claim 2, the discharge capacity that it is characterized in that workover fluid is 0.5m 3/ min.
4. horizontal well unfreezing fishing method according to claim 2 is characterized in that pump pressure is 115Mpa.
5. horizontal well unfreezing fishing method according to claim 2 is characterized in that rotary speed is 25r/min.
6. horizontal well unfreezing fishing method according to claim 2 is characterized in that the pressure of the drill is 15KN.
CN2007101445303A 2007-10-31 2007-10-31 Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof Active CN101148975B (en)

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CN101148975B true CN101148975B (en) 2010-10-27

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101899956B (en) * 2010-03-17 2013-02-27 北京华油油气技术开发有限公司 Method for salvaging electric pump pipe column fish
US8261830B2 (en) * 2010-09-01 2012-09-11 Baker Hughes Incorporated Fishing tool and method
CN101994496B (en) * 2010-09-17 2013-06-19 北京奥瑞安能源技术开发有限公司 Method for treating drilling tool jamming accident in coalbed methane multi-branch horizontal well
CN101956548B (en) * 2010-09-25 2013-05-08 北京奥瑞安能源技术开发有限公司 Coal bed methane multi-branch horizontal well system and modification method thereof
CN102174880B (en) * 2011-02-28 2013-09-11 中国石油集团川庆钻探工程有限公司 Releasing method applicable to packer layered sand fracturing string
CN102322228B (en) * 2011-06-23 2014-03-19 北京市三一重机有限公司 Centralizer and drill rod and engineering machine applying same
CN103967439A (en) * 2014-04-28 2014-08-06 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 Continuous milling and salvage integrated tool and milling and salvage method thereof
CN106089141B (en) * 2016-07-27 2019-07-16 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 A method of implementing back-off in net horizontal section and salvages

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Effective date of registration: 20211228

Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Longnan Victory Road No. 1

Patentee after: Daqing Oilfield Co.,Ltd.

Patentee after: PetroChina Co Ltd

Address before: 163513 Heilongjiang Province, Daqing City Ranghulu District Longnan Victory Road No. 1

Patentee before: Daqing Oilfield Co.,Ltd.