CN201924905U - Differential pressure open sliding sleeve for horizontal well fracturing - Google Patents

Differential pressure open sliding sleeve for horizontal well fracturing Download PDF

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Publication number
CN201924905U
CN201924905U CN 201020685585 CN201020685585U CN201924905U CN 201924905 U CN201924905 U CN 201924905U CN 201020685585 CN201020685585 CN 201020685585 CN 201020685585 U CN201020685585 U CN 201020685585U CN 201924905 U CN201924905 U CN 201924905U
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CN
China
Prior art keywords
sliding sleeve
urceolus
inner sliding
horizontal well
sand jet
Prior art date
Application number
CN 201020685585
Other languages
Chinese (zh)
Inventor
程智远
韩永亮
何志勇
刘志斌
张鹏
田文江
詹鸿运
骆劲羽
郑永哲
Original Assignee
中国石油集团渤海钻探工程有限公司
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Priority to CN 201020685585 priority Critical patent/CN201924905U/en
Application granted granted Critical
Publication of CN201924905U publication Critical patent/CN201924905U/en

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Abstract

The utility model relates to a differential pressure open sliding sleeve for horizontal well fracturing, which comprises an upper joint, an outer cylinder and a lower joint which are connected sequentially in a threaded manner. An inner sliding sleeve and the outer cylinder are fixed by a shear pin, and a split ring is nested in an annular groove on the outer wall at the bottom of the inner sliding sleeve. The differential pressure open sliding sleeve without a ball seat structure needs no special ball throwing operation, and is opened by the aid of the area difference between the upper section and the lower section of the inner sliding sleeve. The differential pressure open sliding sleeve has the advantages of locking in downward shifting, simple structure and convenience in operation, and is mainly used for sectional fracturing technology of a horizontal well in an oil and gas field.

Description

Fractured horizontal well is with differential unlatching sliding sleeve

Technical field

The utility model relates to a kind of fractured horizontal well with differential unlatching sliding sleeve, is mainly used in the fractured horizontal well reforming technology in the oilfield exploitation procedure, belongs to the wellbore operations instrument that the oil gas well development is used.

Background technology

At present, the sandblast sliding sleeve of using in the oil gas field separate stratum fracfturing process pipe string all is the form of ball socket structure, must sliding sleeve be opened by pitching (valve ball and valve seat are complementary), and, do not need retaining mechanism just can finish fracturing work all at straight well or inclined shaft design.But for the horizontal well in segments pressure break, needing ball with top to return after pressing crack construction finishes discharges, so just require first order sliding sleeve for not containing the structure of ball seat, simultaneously on inner sliding sleeve, move the shutoff sand jet outlet, cause valve ball return row not smoothly, output reduces, recovery ratio reduces, influence the operation such as discharge opeing, formation testing gas testing in later stage, this just need be designed to inner sliding sleeve to move down the form of structure of locking.

The utility model content

The purpose of this utility model is to provide a kind of fractured horizontal well with differential unlatching sliding sleeve, this sliding sleeve does not have ball socket structure, do not need the pitching operation, be that area difference by the upper and lower cross section of inner sliding sleeve is opened sliding sleeve, the inner sliding sleeve of this sliding sleeve adopts the form of structure that moves down locking simultaneously, avoid moving the shutoff sand jet outlet on the inner sliding sleeve, guarantee that sand jet outlet keeps normally open when producing.

The utility model adopts following technical scheme, be a kind of fractured horizontal well with differential unlatching sliding sleeve, constitute by being threaded by top connection, urceolus, lower contact successively from top to bottom, it is characterized in that inner sliding sleeve is tubular, inner sliding sleeve places in the urceolus, the inner sliding sleeve of initial position is fixed on the inwall of urceolus by shear pin, and inner sliding sleeve has hidden the sand jet outlet on the outer tube wall, on the outer wall of inner sliding sleeve bottom, have circumferential groove, be provided with split ring in the circumferential groove, have pressure transmission hole on the bottom barrel of urceolus.The external diameter of split ring is greater than the internal diameter of urceolus, and the split ring nest is in the circumferential groove on the inner sliding sleeve.

The upper port of inner sliding sleeve of the present utility model is the funnel-form of convergence, and load fluid was to the erosion of inner sliding sleeve when this design can reduce pressing crack construction; Can also guarantee that the valve ball that is complementary with seat blocking seat can pass through smoothly.

Seal by sealing ring between inner sliding sleeve of the present utility model and outer tube inner wall, in addition, top connection and urceolus junction, urceolus and lower contact junction all seal with sealing ring.

Have a plurality of sand jet outlets on the urceolus, sand jet outlet is along the urceolus circumferential arrangement, sand jet outlet is vertical slotted hole, have annular ditch groove on the position of corresponding sand jet outlet on the outer tube inner wall, all sand jet outlets are communicated with, the area sum of each sand jet outlet should be greater than the area of passage of tubing string, the restriction loss in the time of can reducing liquid by sand jet outlet.

Operating principle of the present utility model, when suppressing by oil pipe, because the upper and lower cross section of the area official post inner sliding sleeve in the upper and lower cross section of inner sliding sleeve forms pressure reduction, when this pressure reduction reach shear pin cut off pressure the time, shear pin is cut off, pressure continues to promote inner sliding sleeve and moves down, when inner sliding sleeve is displaced downwardly to a certain position of lower contact inner chamber, the circumferential groove on the inner sliding sleeve and the inwall of urceolus stagger, split ring spreading in the circumferential groove, can realize locking, at this moment the sand jet outlet on the urceolus all exposes, for fracturing fluid or oil gas provide flow channel.

The utility model is simple in structure, and is safe and reliable, is applicable to the staged fracturing construction technology of horizontal well.

Description of drawings

Fig. 1 is the structure chart of fractured horizontal well with differential unlatching sliding sleeve;

In the drawings: top connection 1, urceolus 2, sand jet outlet 3, shear pin 4, sealing ring 5, split ring 6, lower contact 7, inner sliding sleeve 8, pressure transmission hole 9.

The specific embodiment

Below in conjunction with accompanying drawing, structure of the present utility model is further specified, as shown in Figure 1, fractured horizontal well of the present utility model is with differential unlatching sliding sleeve, from top to bottom successively by top connection 1, urceolus 2, lower contact 7 is by the formation that is threaded, it is characterized in that inner sliding sleeve 8 is tubular, inner sliding sleeve 8 places in the urceolus 2, the inner sliding sleeve 8 of initial position is fixed on the inwall of urceolus 2 by shear pin, and inner sliding sleeve 8 has hidden the sand jet outlet 3 on urceolus 2 walls, on the outer wall of inner sliding sleeve 8 bottoms, have circumferential groove, be provided with split ring 6 in the circumferential groove, have pressure transmission hole 9 on the bottom barrel of urceolus 2.

Above-mentioned fractured horizontal well is with the external diameter of the split ring 6 of the differential unlatching sliding sleeve internal diameter greater than urceolus 2, and split ring 6 nests are in the circumferential groove on inner sliding sleeve 8 bottom outer wall.

The upper port of inner sliding sleeve 8 of the present utility model is the funnel-form of convergence, and load fluid can also guarantee that to the erosion of inner sliding sleeve the valve ball that is complementary with seat blocking seat can pass through smoothly when this design can reduce pressing crack construction.

By sealing ring 5 sealings, in addition, top connection and urceolus junction, urceolus and lower contact junction are all with sealing ring 5 sealings between inner sliding sleeve 8 of the present utility model and urceolus 2 inwalls.

Have six sand jet outlets 3 on the urceolus 2, sand jet outlet 3 is along urceolus 2 circumferential arrangement, sand jet outlet is parallel to the axial vertical slotted hole of urceolus 2, have annular ditch groove on the position of corresponding sand jet outlet on urceolus 2 inwalls, all sand jet outlets 3 are communicated with, the area sum of each sand jet outlet is the twice of the area of passage of tubing string in the present embodiment, has reduced the restriction loss when liquid passes through sand jet outlet.

Claims (5)

1. a fractured horizontal well is with differential unlatching sliding sleeve, from top to bottom successively by top connection (1), urceolus (2), lower contact (7) by the formation that is threaded, it is characterized in that inner sliding sleeve (8) is tubular, inner sliding sleeve (8) places in the urceolus (2), the inner sliding sleeve of initial position (8) is fixed on the inwall of urceolus (2) by shear pin, and inner sliding sleeve (8) has hidden the sand jet outlet (3) on urceolus (2) wall, on the outer wall of inner sliding sleeve (8) bottom, have circumferential groove, be provided with in the circumferential groove on the bottom barrel of split ring (6) urceolus (2) and have pressure transmission hole (9).
2. fractured horizontal well as claimed in claim 1 is characterized in that the internal diameter of the external diameter of described split ring (6) greater than urceolus (2) with differential unlatching sliding sleeve, and split ring (6) nest is in the circumferential groove on inner sliding sleeve (8) bottom outer wall.
3. fractured horizontal well as claimed in claim 1 is characterized in that with differential unlatching sliding sleeve the upper port of described inner sliding sleeve (8) is the funnel-form of convergence.
4. fractured horizontal well as claimed in claim 1 is with differential unlatching sliding sleeve, it is characterized in that being sealed by sealing ring (5) between the outer wall of described inner sliding sleeve (8) and urceolus (2) inwall.
5. fractured horizontal well as claimed in claim 1 is with differential unlatching sliding sleeve, it is characterized in that having on the described urceolus (2) six sand jet outlets (3), sand jet outlet (3) is along urceolus (2) circumferential arrangement, sand jet outlet is for being parallel to the axial vertical slotted hole of urceolus (2), have annular ditch groove on the position of corresponding sand jet outlet on urceolus (2) inwall, all sand jet outlets (3) are communicated with.
CN 201020685585 2010-12-23 2010-12-23 Differential pressure open sliding sleeve for horizontal well fracturing CN201924905U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201020685585 CN201924905U (en) 2010-12-23 2010-12-23 Differential pressure open sliding sleeve for horizontal well fracturing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201020685585 CN201924905U (en) 2010-12-23 2010-12-23 Differential pressure open sliding sleeve for horizontal well fracturing

Publications (1)

Publication Number Publication Date
CN201924905U true CN201924905U (en) 2011-08-10

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CN 201020685585 CN201924905U (en) 2010-12-23 2010-12-23 Differential pressure open sliding sleeve for horizontal well fracturing

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352746A (en) * 2011-10-17 2012-02-15 中国石油天然气股份有限公司 Reducing sliding sleeve of bushing
CN102619494A (en) * 2012-04-16 2012-08-01 江苏如通石油机械股份有限公司 Multi-section sliding sleeve type sand jet perforating and fracturing tool
CN102979494A (en) * 2012-12-28 2013-03-20 中国石油集团渤海钻探工程有限公司 Throwing open type multi-cluster sliding sleeve
CN103032058A (en) * 2011-10-03 2013-04-10 克拉玛依特隆油田技术服务有限责任公司 Horizontal multi-stage fracturing sliding sleeve of an oil field and opening tool
CN103089227A (en) * 2011-11-03 2013-05-08 中国石油天然气股份有限公司 Large drift diameter drilling-free segmented fracture well completion sliding sleeve device
CN103452542A (en) * 2012-05-28 2013-12-18 中国石油天然气股份有限公司 Switchable fracturing sliding sleeve
CN104100232A (en) * 2013-04-15 2014-10-15 中国石油化工股份有限公司 Double-piston hydraulic switch and application thereof
CN104929603A (en) * 2015-06-05 2015-09-23 中国石油集团渤海钻探工程有限公司 Infinite stage type sectional cracking method for sleeve
CN105569606A (en) * 2014-10-11 2016-05-11 中国石油化工股份有限公司 Switchable pressure differential sliding sleeve
CN107701162A (en) * 2017-11-24 2018-02-16 中国石油集团渤海钻探工程有限公司 A kind of self locking type bidirectional blocks sanding machine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103032058A (en) * 2011-10-03 2013-04-10 克拉玛依特隆油田技术服务有限责任公司 Horizontal multi-stage fracturing sliding sleeve of an oil field and opening tool
CN102352746B (en) * 2011-10-17 2014-06-04 中国石油天然气股份有限公司 Reducing sliding sleeve of bushing
CN102352746A (en) * 2011-10-17 2012-02-15 中国石油天然气股份有限公司 Reducing sliding sleeve of bushing
CN103089227A (en) * 2011-11-03 2013-05-08 中国石油天然气股份有限公司 Large drift diameter drilling-free segmented fracture well completion sliding sleeve device
CN103089227B (en) * 2011-11-03 2015-12-09 中国石油天然气股份有限公司 Big orifice exempts to bore staged fracturing well completion sliding sleeve device
CN102619494A (en) * 2012-04-16 2012-08-01 江苏如通石油机械股份有限公司 Multi-section sliding sleeve type sand jet perforating and fracturing tool
CN103452542A (en) * 2012-05-28 2013-12-18 中国石油天然气股份有限公司 Switchable fracturing sliding sleeve
CN103452542B (en) * 2012-05-28 2016-04-06 中国石油天然气股份有限公司 Can switch fracturing sliding bush
CN102979494A (en) * 2012-12-28 2013-03-20 中国石油集团渤海钻探工程有限公司 Throwing open type multi-cluster sliding sleeve
CN102979494B (en) * 2012-12-28 2015-10-28 中国石油集团渤海钻探工程有限公司 Pitching open-type many bunches of sliding sleeves
CN104100232A (en) * 2013-04-15 2014-10-15 中国石油化工股份有限公司 Double-piston hydraulic switch and application thereof
CN105569606B (en) * 2014-10-11 2018-06-29 中国石油化工股份有限公司 A kind of switchable differential sliding sleeve
CN105569606A (en) * 2014-10-11 2016-05-11 中国石油化工股份有限公司 Switchable pressure differential sliding sleeve
CN104929603B (en) * 2015-06-05 2017-07-11 中国石油集团渤海钻探工程有限公司 Sleeve pipe infinite stages staged fracturing method
CN104929603A (en) * 2015-06-05 2015-09-23 中国石油集团渤海钻探工程有限公司 Infinite stage type sectional cracking method for sleeve
CN107701162A (en) * 2017-11-24 2018-02-16 中国石油集团渤海钻探工程有限公司 A kind of self locking type bidirectional blocks sanding machine

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