CN202215223U - Technology for limit-free staged fracturing down-hole string of horizontal open well - Google Patents
Technology for limit-free staged fracturing down-hole string of horizontal open well Download PDFInfo
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- CN202215223U CN202215223U CN2011202641469U CN201120264146U CN202215223U CN 202215223 U CN202215223 U CN 202215223U CN 2011202641469 U CN2011202641469 U CN 2011202641469U CN 201120264146 U CN201120264146 U CN 201120264146U CN 202215223 U CN202215223 U CN 202215223U
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- packer
- oil pipe
- staged fracturing
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Abstract
A technology for limit-free staged fracturing a down-hole string of a horizontal open well is applied in oil field well fracturing construction. The middle part of an oil pipe is connected with a hydraulic anchor, a seal insertion pipe and a suspension packer; the lower end of the oil pipe which is connected with the lower end of the suspension packer is connected with 2-15 sealing and partitioning sand blasting groups; and each sealing and partitioning sand blasting group consists of a sand blaster, a self expansion packer and a pressure pipe which have the same drift diameters, and the lower end of the self expansion packer of the sealing and partitioning sand blasting group at the lowest part is connected with a differential pressure type sliding sleeve and a float shoe. The technology provided by the utility model has the effects that: the immovable string can be fractured by sections and reproduced without limit, so the technical bottleneck of limited reproduction section number of the existing horizontal open well staged fracturing reproduction technology is solved.
Description
Technical field
The utility model relates to oil gas field gas well staged fracturing technical field of construction, and particularly the process pipe string of long horizontal segment staged fracturing under the open-hole horizontal well completion mode can be accomplished the transformation of fixed tubular column staged fracturing.
Background technology
At present, technology such as bore hole compression packer, self-expanding packer, hydraulic sand blasting staged fracturing have at home and abroad obtained using widely in the gas water horizontal well staged fracturing.Mainly adopt the ball sealer of throwing ascending different size to accomplish the unlatching of each section sandblaster and the isolation of the section of transformation during its segmentation of these technologies; But owing to receive the restriction of well head, pit shaft, operating tool string, instrument design size etc.; Even through technology, instrument continue to optimize and perfect, also only can accomplish the staged fracturing transformation of Finite segment.Simultaneously; What these technologies often adopted is the integrated of pressure break and production; Owing to receive the restriction of technology, downhole tool design; These technologies generally do not possess the function of later stage control production, selectivity exploitation yet, and for the complicated horizontal well of air water relation, this kind form of construction work might have influence on its final recovery ratio.Go into the well casing post, particularly generally can not (be difficult to) after the tubing string completion of reservoir section move again, the tubing string internal diameter of reservoir section is less in addition, and difficulty is just compared in the transformation that repeats of the wellbore operations in horizontal well later stage or reservoir.
Progress and reservoir reconstruction lifting along with drilling technology; The horizontal well horizontal section length is more and more longer; It is also more and more to transform hop count; Therefore, the separate stratum fracfturing reforming technology of Finite segment just be difficult to satisfy long horizontal well more multiple pressure split the technical need of hop count, need exploratory development to adapt to the technological and open-hole horizontal well of the gas water horizontal well staged fracturing reforming technology of multi-section multi-layer more and do not limit progression staged fracturing down-hole string.
The utility model content
The purpose of the utility model is: provide a kind of open-hole horizontal well not limit progression staged fracturing down-hole string; Employing waits latus rectum sandblaster and self-expanding packer; The fracturing reform hop count does not receive the restriction of borehole size; Can realize the staged fracturing transformation of infinite stages, satisfy the technological requirement of the long horizontal segment multistage of gas field open-hole horizontal well pressure break.
The technical scheme that the utility model adopts is: open-hole horizontal well is not limit progression staged fracturing down-hole string, mainly by oil pipe, hydraulic anchor, sealing intubate, hanging packer, etc. latus rectum sandblaster, self-expanding packer, connecting pipe, differential sliding sleeve and float shoe form.Middle part at oil pipe is connected with hydraulic anchor, and the lower end of hydraulic anchor connects the sealing intubate, and the lower end of sealing intubate connects hanging packer; The lower end of hanging packer connects oil pipe; The lower end of the oil pipe that connects in the lower end of hanging packer is connected with 2～15 packing sandblast groups; Described packing sandblast group is by waiting latus rectum sandblaster, self-expanding packer and connecting pipe to form, and the upper end of packing sandblast group is to wait the latus rectum sandblaster, connects connecting pipe in the lower end of waiting the latus rectum sandblaster, connects the self-expanding packer in the lower end of connecting pipe; Self-expanding packer lower end in the packing sandblast group of foot connects a differential sliding sleeve, connects a float shoe in the lower end of differential sliding sleeve.
The summary open-hole horizontal well is not limit the operating process of progression staged fracturing down-hole string.(1) descends repeatedly drifting to net horizontal section bottom of drifting tubing string drifting, trip out the drifting drilling tool.(2) the pressing crack construction tubing string is lowered to.Adopt drilling rod that open-hole horizontal well is not limit and arrive design attitude under the progression staged fracturing down-hole string, mud in the pit shaft is replaced out.After waiting for that the self-expanding packer setting is accomplished, pitching sets hanging packer, and the pitching latus rectum multistage fracturing technology tubing strings such as open-hole horizontal well of giving up trip out the above drilling rod of sealed tube again, are lowered to the pressing crack construction tubing string again.To seal intubate fill-in well lower tubular column, accomplish being lowered to and docking of pressing crack construction tubing string.(3) the staged fracturing construction is divided into first section of pressure break, second section of pressure break ...First section pressure break: at first oil pipe pressurization; Open differential sliding sleeve; Implement fracturing through oil pipe to first section, simultaneously, pressure guiding pipeline conducts to second section with the pressure in the fracturing process and waits in the latus rectum sandblaster; Highly pressurised liquid waits the compression set of latus rectum sandblaster to start with second section, forces original waiting in the latus rectum sandblaster to form a undersized ball seat.After first section pressure break accomplished; Drop into ball sealer from oil pipe, ball to be sealed drops on second section and waits on the little ball seat that forms in the latus rectum sandblaster oil pipe pressurization; Be connected pin between shearing the pressure-bearing cover and pressure transmission being overlapped; Sliding sleeve and ball sealer together fall on the sleeve base, and at this moment, oil pipe waits latus rectum sandblaster sand jet outlet and second section gas-bearing formation section to link up through second; Ball seat and ball sealer shutoff the first gas-bearing formation section; The annular space of the self-expanding packer packing is separated oil pipe and bore hole under the situation of fixed tubular column, carries out second section pressure break.C, the frac pressure through leading portion successively in the same way form the ball seat of back segment, drop into the ball sealer of same size from well head and can accomplish the multistage pressure break of not limitting progression.(4) close then a layer discharge opeing, ask product.(5) if carry out selectivity exploitation, bore the grinder tool by the coiled tubing band, bore grind off ball sealer and ball seat after; Adopt the sliding sleeve switch instrument again, open and close sliding sleeve, can carry out the selectivity exploitation; If which section is produced water, can the sliding sleeve of this section be barred up, only let the aerogenesis section produce.
The beneficial effect of the utility model: open-hole horizontal well is not limit progression staged fracturing down-hole string,
The first, fixed tubular column can realize not limitting the staged fracturing transformation of progression, has solved the long horizontal segment segmentation of present bore hole reforming technology and has had the limited technical bottleneck of transformation hop count.
The second, self-expanding packer has increased the packing reliability under the irregular open hole well, has improved the staged fracturing effect.
Three, after brill grinds off ball sealer and ball seat, down-hole pipe string can be realized the all-pass footpath, is beneficial to the later stage operation.After brill grinds off ball sealer and ball seat, wait the sliding sleeve switch arbitrarily in the latus rectum sandblaster, can carry out the selectivity exploitation or close certain fractured interval.Even can not bore fully and grind off ball sealer and ball seat, liquid outlet that also can the shutoff upper level when closing layer discharge opeing.
Description of drawings
Fig. 1 is that the utility model open-hole horizontal well is not limit progression staged fracturing down-hole string structural representation.
Among the figure: the 1-well head, the 2-oil pipe, the 3-hydraulic anchor, 4-seals intubate, 5-hanging packer, latus rectum sandblasters such as 6-, 7-self-expanding packer, 8-connecting pipe, the differential sliding sleeve of 9-, 10-float shoe.
The specific embodiment
Embodiment 1: consult Fig. 1.The utility model open-hole horizontal well is not limit progression staged fracturing down-hole string, mainly by oil pipe 2, hydraulic anchor 3, sealing intubate 4, hanging packer 5, etc. latus rectum sandblaster 6, self-expanding packer 7, connecting pipe 8, differential sliding sleeve 9 and float shoe 10 form.
Be connected with a hydraulic anchor 3 at the middle part of oil pipe 2, the lower end of hydraulic anchor 3 connects a sealing intubate 4, and the lower end of sealing intubate 4 connects a hanging packer 5.The lower end of hanging packer 5 connects oil pipe 2.The lower end of the oil pipe 2 that connects in the lower end of hanging packer 5 is connected with six packing sandblast groups.
Described packing sandblast group waits latus rectum sandblaster 6, a self-expanding packer 7 and a connecting pipe 8 to form by one.The upper end of packing sandblast group is to wait latus rectum sandblaster 6, connects connecting pipe 8 in the lower end of waiting latus rectum sandblaster 6, connects self-expanding packer 7 in the lower end of connecting pipe 8.Self-expanding packer 7 lower ends in the packing sandblast group of foot connect a differential sliding sleeve 9, connect a float shoe 10 in the lower end of differential sliding sleeve 9.
Work progress: at first, the drifting of following drifting tubing string, repeatedly drifting to net horizontal section bottom trips out the drifting drilling tool.Utilize drilling rod and releasing device that following pipe strings such as hanging packer are arrived design attitude down, mud in the pit shaft is replaced out.After waiting for that the self-expanding packer setting is accomplished; Pitching sets hanging packer; The pitching string such as pipe below the hanging packer etc. of giving up again; Trip out drilling rod and releasing device tubing string, be lowered to fracturing fluid again and inject oil pipe 2, hydraulic anchor 3, sealed tube 4 operating tool strings and dock with down-hole string, the completion open-hole horizontal well is not limit being lowered to of progression staged fracturing down-hole string.Be fixed on the upper end that open-hole horizontal well is not limit progression staged fracturing down-hole string to well head 1.Differential sliding sleeve 9 is opened at first oil pipe 2 pressurizations, implements fracturing for 2 pairs first section through oil pipe, simultaneously, utilizes the effect of this section pressure, waits in the latus rectum sandblaster 6 at second section to form ball seat; After first section pressure break accomplished, drop into ball sealer from oil pipe, ball to be sealed drops on second section and waits on the ball seat that forms in the latus rectum sandblaster 6; Oil pipe pressurizes, and shears the pin that is connected between pressure-bearing cover and the pressure transmission cover, and sliding sleeve and ball sealer together fall on the sleeve base; At this moment, oil pipe waits latus rectum sandblaster spout and second section gas-bearing formation section to link up through second, at this moment; Elastic base and ball sealer shutoff the passage of oil pipe and first section gas-bearing formation section; The annular space of the self-expanding packer packing is separated oil pipe and bore hole under the situation of fixed tubular column, carries out second section pressure break.Through the frac pressure of leading portion, form the ball seat of back segment so successively, accomplish the multistage separate stratum fracfturing of not limitting progression.Close a layer discharge opeing at last, ask product.If carry out the selectivity exploitation, bore the grinder tool by the coiled tubing band, after brill grinds off ball sealer and ball seat, adopt the sliding sleeve switch instrument again, open and close sliding sleeve arbitrarily, carry out selectivity exploitation aerogenesis section and produce.
Claims (1)
1. an open-hole horizontal well is not limit progression staged fracturing down-hole string, mainly by oil pipe (2), hydraulic anchor (3), sealing intubate (4), hanging packer (5), etc. latus rectum sandblaster (6), self-expanding packer (7), connecting pipe (8), differential sliding sleeve (9) and float shoe (10) form; Be connected with hydraulic anchor (3) at the middle part of oil pipe (2), the lower end of hydraulic anchor (3) connects sealing intubate (4), and the lower end of sealing intubate (4) connects hanging packer (5); The lower end of hanging packer (5) connects oil pipe (2); It is characterized in that: the lower end of the oil pipe (2) that connects in the lower end of hanging packer (5) is connected with 2～15 packing sandblast groups; Described packing sandblast group is by waiting latus rectum sandblaster (6), self-expanding packer (7) and connecting pipe (8) to form; The upper end of packing sandblast group is to wait latus rectum sandblaster (6); Connect connecting pipe (8) in the lower end of waiting latus rectum sandblaster (6), connect self-expanding packer (7) in the lower end of connecting pipe (8); Self-expanding packer (7) lower end in the packing sandblast group of foot connects a differential sliding sleeve (9), connects a float shoe (10) in the lower end of differential sliding sleeve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641469U CN202215223U (en) | 2011-07-25 | 2011-07-25 | Technology for limit-free staged fracturing down-hole string of horizontal open well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641469U CN202215223U (en) | 2011-07-25 | 2011-07-25 | Technology for limit-free staged fracturing down-hole string of horizontal open well |
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| CN202215223U true CN202215223U (en) | 2012-05-09 |
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| CN2011202641469U Expired - Lifetime CN202215223U (en) | 2011-07-25 | 2011-07-25 | Technology for limit-free staged fracturing down-hole string of horizontal open well |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075138A (en) * | 2013-01-10 | 2013-05-01 | 中国海洋石油总公司 | Staged fracturing and staged oil production integrated string for horizontal well |
| CN103277079A (en) * | 2013-06-04 | 2013-09-04 | 中国海洋石油总公司 | String and fracturing construction method for horizontal well fracturing completion |
| CN103628864A (en) * | 2013-11-22 | 2014-03-12 | 中国石油天然气股份有限公司 | Multi-segment fractured horizontal well intelligent test system and method |
| CN103806888A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Downhole infinite level digital control fracture sliding sleeve |
| CN104131782A (en) * | 2014-07-10 | 2014-11-05 | 上海大学 | Drifting bottom hole assembly determining method |
| US9605531B2 (en) | 2013-11-22 | 2017-03-28 | Petrochina Company Limited | Intelligent test system and method for multi-segment fractured horizontal well |
-
2011
- 2011-07-25 CN CN2011202641469U patent/CN202215223U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806888A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Downhole infinite level digital control fracture sliding sleeve |
| CN103806888B (en) * | 2012-11-12 | 2016-05-11 | 中国石油天然气股份有限公司 | Down-hole infinite series control fracturing sliding bush |
| CN103075138A (en) * | 2013-01-10 | 2013-05-01 | 中国海洋石油总公司 | Staged fracturing and staged oil production integrated string for horizontal well |
| CN103277079A (en) * | 2013-06-04 | 2013-09-04 | 中国海洋石油总公司 | String and fracturing construction method for horizontal well fracturing completion |
| CN103277079B (en) * | 2013-06-04 | 2015-12-09 | 中国海洋石油总公司 | A kind of tubing string of horizontal well fracturing completion and pressing crack construction method thereof |
| CN103628864A (en) * | 2013-11-22 | 2014-03-12 | 中国石油天然气股份有限公司 | Multi-segment fractured horizontal well intelligent test system and method |
| CN103628864B (en) * | 2013-11-22 | 2016-01-06 | 中国石油天然气股份有限公司 | Multistage pressure break horizontal well intelligent test system and method for testing |
| US9605531B2 (en) | 2013-11-22 | 2017-03-28 | Petrochina Company Limited | Intelligent test system and method for multi-segment fractured horizontal well |
| CN104131782A (en) * | 2014-07-10 | 2014-11-05 | 上海大学 | Drifting bottom hole assembly determining method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |