CN202745846U - Perforating, fracturing and sand washing integrated string for coiled tubing - Google Patents

Perforating, fracturing and sand washing integrated string for coiled tubing Download PDF

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Publication number
CN202745846U
CN202745846U CN 201220338058 CN201220338058U CN202745846U CN 202745846 U CN202745846 U CN 202745846U CN 201220338058 CN201220338058 CN 201220338058 CN 201220338058 U CN201220338058 U CN 201220338058U CN 202745846 U CN202745846 U CN 202745846U
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CN
China
Prior art keywords
fracturing
coiled tubing
string
perforating
sand washing
Prior art date
Application number
CN 201220338058
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Chinese (zh)
Inventor
姜勇
任国富
王治国
邵媛
张丽娟
胡相君
任勇
王在强
冯飞
蒙鑫
Original Assignee
中国石油天然气股份有限公司
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Priority to CN 201220338058 priority Critical patent/CN202745846U/en
Application granted granted Critical
Publication of CN202745846U publication Critical patent/CN202745846U/en

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Abstract

The utility model discloses a perforating, fracturing and sand washing integrated string for coiled tubing, which is designed for realizing the integrated operation of perforating, fracturing and post-fracturing sand washing. The string is composed of coiled tubing, a connector, a shear release, a mechanical casing collar locator, an injector and a tail pipe which are connected, a wiper block and a nozzle which is fixed by a pressing cap are arranged on the outside of the injector, a wiper block is arranged on the outside of the tail pipe, a cross baffle and a steel ball are arranged in the tail pipe, and the lower part of the tail pipe is a guide shoe on which small through holes are uniformly distributed. According to the string, the tail pipe is adopted for replacing and undertaking all functions of a conventional coiled tubing fracturing string centralizer, a check valve and a guide shoe, so that the distance between a nozzle and a sand surface is shortened, the injector has a positive sand washing ability, and an operation of carrying out perforating, fracturing and sand washing on an oil-gas reservoir can be realized by using the string once, therefore, the construction efficiency is high. The string carries out interlayer sand filling packing through the under-pressure dragging of the coiled tubing, so that the number of construction sections is not restricted; through adopting the perforating and annulus fracturing of the coiled tubing, the increasing of the size of fracturing construction is facilitated; and after the fracturing is completed, a shaft can maintain a large drift diameter, which facilitates the late secondary modification operation of oil-gas wells.

Description

Coiled tubing perforation, pressure break and sand washing integrated pipe column
Technical field
The utility model relates to a kind of coiled tubing perforation, pressure break and sand washing integrated pipe column, belongs to oil and gas wells in oil fields fracturing technique field.
Background technology
Long celebrating oil gas field multilayer build-up, opening as far as possible more multi-layered number has become one of effective way that improves well yield.Conventionally adopt the mode of mechanical packer and sliding bush combination to carry out separate stratum fracfturing, but limited with the hop count of this technological transformation, the pit shaft latus rectum is less after the pressure break.Although well completion of casing sliding sleeve separate stratum fracfturing technique can address the above problem, high to the cementing quality requirement, because there not being the perforation link, the phenomenon of the layer of not turning up the soil can appear pressing in the fracturing process.
The coiled tubing fracturing technique have transform the number of plies unrestricted, can with pressurely drag operation and pressure break after pit shaft keep the advantages such as large latus rectum, at present, be subjected to the restriction of coiled tubing size, each major oil and gas field uses the reforming technology of coiled tubing hydraulic jet perforation, annular fracturing usually, and this technique can be taked back-up sand layering and mechanical packer layering dual mode.The downhole tool of mechanical packer layering is complicated, has larger bit freezing risk.Because domestic fracturing pipe column of continuous oil pipe do not possess the sand washing function, in fracturing process and in the sand washing operation of pressure break after complete, be lowered to sand-flushing pipe column one time, so construction sequence is many, the cycle is long.
Summary of the invention
The purpose of this utility model is to provide a kind of coiled tubing perforation, pressure break and sand washing integrated pipe column, and it can with pressurely drag realizes perforation, pressure break and press the rear integrated operation of sand washing.
Concrete technical scheme of the present utility model is as follows:
This integrated pipe column coiled tubing lower end connects connector, and the connector lower end connects to shear gives up, and shears the lower end of giving up and connects the mechanical type casing collar locator (CCL), and mechanical casing collar locator lower end connects ejector, ejector lower end union tail.
The housing outer wall top of ejector is provided with uniform wiper block, and the housing barrel is provided with radially screw, and nozzle is fixed on radially in the screw by pressure cap.
The housing outer wall top of tail pipe is provided with uniform wiper block, the inner walls top cross baffle that is threaded, and steel ball is located at housing internal taper hole bottom, and lower housing portion is guide shoe, is evenly equipped with the fluid small through hole on the guide shoe barrel.
The utility model integrated pipe column utilizes tail pipe to substitute and bear the repertoire of conventional fracturing pipe column of continuous oil pipe centralizer, ball-and-seat and guide shoe, can shorten nozzle apart from the distance of sand face, make the standby positive sand washing ability of ejector, do not need to descend specially again sand-flushing pipe column, but one-trip string is realized perforation, pressure break and the sand washing of oil-gas Layer, and efficiency of construction is high.Carry out interlayer back-up sand packing by with pressure the dragging of coiled tubing, make the construction hop count unrestricted, adopt coiled tubing perforation and annular fracturing, can make string friction little, be beneficial to the pressing crack construction scale that increases, after pressure break finishes, pit shaft can keep large latus rectum, is convenient to the Late reformation operation of Oil/gas Well.
Description of drawings
Fig. 1 is coiled tubing perforation, pressure break and sand washing integrated pipe column schematic diagram.
Fig. 2 is the ejector sectional drawing.
Fig. 3 is the tail pipe sectional drawing.
The specific embodiment
Further specify referring to figs. 1 through 3 couples of embodiment of the present utility model:
Embodiment:
This integrated pipe column coiled tubing 1 lower end connects connector 2, connector 2 lower ends connect to shear gives up 3, shearing 3 lower ends of giving up connect mechanical type casing collar locator (CCL) 4, and mechanical casing collar locator 4 lower ends connect ejector 5, ejector 5 lower end union tails 6.
The housing 51 outer wall tops of ejector 5 are provided with six uniform wiper blocks 54, and housing 5 barrels are provided with the radially screw that three apertures are φ 4.0~φ 5.5mm, and nozzle 53 is fixed on radially in the screw by pressure cap 52.
The housing 61 outer wall tops of tail pipe 6 are provided with six uniform wiper blocks 65, and steel ball 63 is located at housing 61 internal taper hole bottoms, and the cross baffle 62 of restriction steel ball 63 scopes of activities is threaded in housing 61 upper inside wall.Housing 61 bottoms are the columnar guide shoe 64 of back cover, are evenly equipped with the fluid small through hole on guide shoe 64 barrels.
The utility model coiled tubing perforation, pressure break and the sand washing integrated pipe column course of work are as follows:
1. be lowered to integrated pipe column, by mechanical casing collar locator 4 location, ejector 5 aimed at the first floor position that needs transformation.
2. hydraulic jet perforation: inject perforating fluid and carry out hydraulic perforating from coiled tubing 1, when load fluid to the distance of nozzle 53 is 200m, improve discharge capacity, abrasive perforating, perforating fluid injects from coiled tubing 1, returns out from oil, cover annular space.
3, annular fracturing: after perforation is finished, inject fracturing fluid from oil, cover annular space, coiled tubing 1 keeps 0.1m simultaneously 3The fracturing fluid discharge capacity of/min.
4, the anti-back-up sand that circulates: behind the complete first paragraph of pressure break, replace corresponding sand amount by main pressure break latter end oil, cover annular space, sedimentation was visited the sand face after 1 hour.Such as needs, can carry out the reverse circulation sand washing by this tubing string, adjust sand face height.
5, reverse circulation sand washing: repeat the 1-4 step and finish all the other two-layer pressure breaks, utilize the direct circulation of this tubing string sand grains to be rushed (because tail pipe 6 length are shorter, nozzle 53 is apart from sand washing sand identity distance from also corresponding shortening, sand cleaning fluid out can feed through to the sand washing sand face that needs from nozzle 53, and sand grains is rushed), then adopt anti-circulation that sand grains is carried out pit shaft, finish the sand washing operation.
6, completion: after sand washing is finished, trip out integrated pipe column, be lowered to conventional flow string, completion production.

Claims (1)

1. a coiled tubing perforation, pressure break and sand washing integrated pipe column is characterized in that:
The coiled tubing lower end connects connector (2), connector (2) lower end connects shears give up (3), shearing (3) lower end of giving up connects mechanical type casing collar locator (CCL) (4), mechanical casing collar locator (4) lower end connects ejector (5), ejector (5) lower end union tail (6);
Housing (51) the outer wall top of ejector (5) is provided with uniform wiper block (54), and housing (5) barrel is provided with radially screw, and nozzle (53) is fixed on radially in the screw by pressure cap (52);
Housing (61) the outer wall top of tail pipe (6) is provided with uniform wiper block (65), housing (61) the upper inside wall cross baffle (62) that is threaded, steel ball (63) is located at housing (61) internal taper hole bottom, housing (61) bottom is guide shoe (64), is evenly equipped with the fluid small through hole on guide shoe (64) barrel.
CN 201220338058 2012-07-12 2012-07-12 Perforating, fracturing and sand washing integrated string for coiled tubing CN202745846U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220338058 CN202745846U (en) 2012-07-12 2012-07-12 Perforating, fracturing and sand washing integrated string for coiled tubing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220338058 CN202745846U (en) 2012-07-12 2012-07-12 Perforating, fracturing and sand washing integrated string for coiled tubing

Publications (1)

Publication Number Publication Date
CN202745846U true CN202745846U (en) 2013-02-20

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CN 201220338058 CN202745846U (en) 2012-07-12 2012-07-12 Perforating, fracturing and sand washing integrated string for coiled tubing

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244083A (en) * 2013-04-25 2013-08-14 中国石油天然气股份有限公司 Foam-assisted hydraulic sandblasting perforating technique pipe string and method
CN103306645A (en) * 2013-06-20 2013-09-18 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 Once drilling fracturing completion pipe string of horizontal well and drilling fracturing completion technology
CN103498648A (en) * 2013-10-17 2014-01-08 中国科学院广州能源研究所 Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology
CN104213895A (en) * 2013-06-05 2014-12-17 中国石油天然气股份有限公司 Hydraulic sand jet perforation, fracture and sand filling integrated technological method
CN104213891A (en) * 2013-06-05 2014-12-17 中国石油天然气股份有限公司 Coiled tubing controllable packer process tubular column for repeated oil well transformation
CN104481489A (en) * 2014-11-11 2015-04-01 中国石油天然气股份有限公司 Coiled tube fracturing and well completion integration technological method for vertical gas well
CN105089553A (en) * 2014-05-14 2015-11-25 中国石油天然气股份有限公司 Pressure-carried multisection fracturing transformation operation valve of oil field horizontal well and back washing well unfreezing method
CN105089554A (en) * 2014-05-14 2015-11-25 中国石油天然气股份有限公司 Oil field horizontal well under-pressure dragging fracturing modification operation valve and reverse well-flushing unfreezing method
CN105201461A (en) * 2015-09-02 2015-12-30 北京泰坦通源天然气资源技术有限公司 Multistage sand jet perforation and fracture combined operation method adopting coiled tubing and bottom packer
CN104453798B (en) * 2014-10-31 2017-02-15 克拉玛依市红都有限责任公司 PVC sleeve pipe waterpower sand blasting perforation device and using method thereof
CN107905776A (en) * 2017-12-04 2018-04-13 中国石油天然气股份有限公司 A kind of gas well fracturing drainage system and method
CN108104757A (en) * 2017-08-17 2018-06-01 中国石油天然气股份有限公司 releasing tool and releasing method
CN109469463A (en) * 2018-10-23 2019-03-15 中国石油集团渤海钻探工程有限公司 The more shower holes of straight well coiled tubing and back-up sand connection make fracturing process
CN109989723A (en) * 2017-12-29 2019-07-09 中国石油天然气股份有限公司 Explosion is given up more shower Kong Lianzuo pressure break sealing devices

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244083A (en) * 2013-04-25 2013-08-14 中国石油天然气股份有限公司 Foam-assisted hydraulic sandblasting perforating technique pipe string and method
CN103244083B (en) * 2013-04-25 2015-10-14 中国石油天然气股份有限公司 Foam assists hydraulic jet perforation process pipe string and method
CN104213895A (en) * 2013-06-05 2014-12-17 中国石油天然气股份有限公司 Hydraulic sand jet perforation, fracture and sand filling integrated technological method
CN104213891A (en) * 2013-06-05 2014-12-17 中国石油天然气股份有限公司 Coiled tubing controllable packer process tubular column for repeated oil well transformation
CN104213895B (en) * 2013-06-05 2018-02-02 中国石油天然气股份有限公司 Hydraulic jet perforation pressure break and back-up sand combination operation process method
CN103306645A (en) * 2013-06-20 2013-09-18 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 Once drilling fracturing completion pipe string of horizontal well and drilling fracturing completion technology
CN103306645B (en) * 2013-06-20 2015-10-28 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 Horizontal well the pressure of the drill splits completion tubular column and technique thereof
CN103498648A (en) * 2013-10-17 2014-01-08 中国科学院广州能源研究所 Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology
CN105089553A (en) * 2014-05-14 2015-11-25 中国石油天然气股份有限公司 Pressure-carried multisection fracturing transformation operation valve of oil field horizontal well and back washing well unfreezing method
CN105089554A (en) * 2014-05-14 2015-11-25 中国石油天然气股份有限公司 Oil field horizontal well under-pressure dragging fracturing modification operation valve and reverse well-flushing unfreezing method
CN104453798B (en) * 2014-10-31 2017-02-15 克拉玛依市红都有限责任公司 PVC sleeve pipe waterpower sand blasting perforation device and using method thereof
CN104481489A (en) * 2014-11-11 2015-04-01 中国石油天然气股份有限公司 Coiled tube fracturing and well completion integration technological method for vertical gas well
CN105201461A (en) * 2015-09-02 2015-12-30 北京泰坦通源天然气资源技术有限公司 Multistage sand jet perforation and fracture combined operation method adopting coiled tubing and bottom packer
CN108104757A (en) * 2017-08-17 2018-06-01 中国石油天然气股份有限公司 releasing tool and releasing method
CN108104757B (en) * 2017-08-17 2020-04-10 中国石油天然气股份有限公司 Unfreezing tool and unfreezing method
CN107905776A (en) * 2017-12-04 2018-04-13 中国石油天然气股份有限公司 A kind of gas well fracturing drainage system and method
CN109989723A (en) * 2017-12-29 2019-07-09 中国石油天然气股份有限公司 Explosion is given up more shower Kong Lianzuo pressure break sealing devices
CN109469463A (en) * 2018-10-23 2019-03-15 中国石油集团渤海钻探工程有限公司 The more shower holes of straight well coiled tubing and back-up sand connection make fracturing process

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