CN203321473U - Dual-hole ball seat - Google Patents
Dual-hole ball seat Download PDFInfo
- Publication number
- CN203321473U CN203321473U CN2013201284779U CN201320128477U CN203321473U CN 203321473 U CN203321473 U CN 203321473U CN 2013201284779 U CN2013201284779 U CN 2013201284779U CN 201320128477 U CN201320128477 U CN 201320128477U CN 203321473 U CN203321473 U CN 203321473U
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- ball seat
- sliding sleeve
- ball
- ditrysian type
- type ball
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Abstract
The utility model discloses a dual-hole ball seat. The dual-hole ball seat (6) is fixedly arranged in a sliding sleeve and comprises a pair of ball holes which are formed in the same horizontal plane of the sliding sleeve; transitional inclined planes and spherical arc surfaces (9) are arranged on the upper edge and the lower edge of both the two ball holes; the diameter of each ball hole is matched with that of a tripping ball (5). The dual-hole ball seat avoids that the tripping ball (5) is clamped, can be matched with a tripping ball (5) with smaller diameter for use, and can achieve the inverse discharge of the primary tripping ball.
Description
Technical field
The utility model relates to a kind of petroleum oil well completion instrument, particularly, the present invention relates to a kind of fracturing sliding bush with ditrysian type ball seat for multistage sliding sleeve staged fracturing construction.
Background technology
Low-permeability oil gas field, shale gas field are the oil fields of exploitation during " 12 ", and multistage sliding sleeve staged fracturing construction technology is one of the major measure in exploitation low-permeability oil gas field, shale gas field.Multistage sliding sleeve staged fracturing technology is the needs according to stratum geological condition and reservoir exploitation, adopt packer that horizontal well is separated into to some sections, drop into the ascending ball that builds the pressure by ground pitching control device in well, open step by step sliding sleeve, targetedly payzone is carried out to staged fracturing.Along with the progress of stimulation technology, the progression of staged fracturing is more and more, and because the internal diameter of pressure break oil pipe is certain, along with the increase of pressure break progression, the differential of the bulb diameter that builds the pressure of injection constantly reduces, and the diameter of the required ball that builds the pressure is also in continuous minimizing.When the diameter of ball and the ball seat internal diameter is little just can affect to a certain extent that operational discharge capacity, production fluid are counter to be arranged and gather (the single hole diameter be take 42mm as boundary usually, and lower than 42mm, construction effect is poor) of oil gas.
The device that multistage sliding sleeve staged fracturing construction adopts usually is fracturing sliding bush.Chinese utility model patent CN201650256 discloses a kind of ball seat type fracturing slide sleeve, and it comprises top connection, splicing sleeve, sliding sleeve pipe, split ring, ball seat and lower contact.Its ball seat is monotrysian type, be positioned at the lower contact top, be fixed on the inboard, lower end of sliding sleeve pipe, the ball seat lower end arranges the taper lug boss, said structure can only be larger with diameter the ball that builds the pressure be used in conjunction with, when required division progression more, the diameter of the required ball that builds the pressure hour, in the situation that discharge capacity is higher, hole again less (for 4-1/2 " sliding sleeve; while referring to single hole diameter≤42mm); there will be larger choke pressure when construction, the sliding sleeve flowing hole is opened in advance, throttle effect occurs.In addition, the taper lug boss of lower end is unfavorable for the build the pressure anti-row of ball of upper level.
The utility model content
In order to solve the ball that builds the pressure that existing fracturing sliding bush can not be less with diameter, be used in conjunction with, chock pressure difference is crossed ambassador's sliding sleeve flowing hole and is opened in advance and be unfavorable for the build the pressure anti-row's of ball problem of upper level, the utility model provides a kind of ditrysian type ball seat, the ball that builds the pressure that its ditrysian type ball seat is can fit diameter less use (for 4-1/2 " sliding sleeve; can realize the ball that builds the pressure of single hole diameter≤42mm); avoided chock pressure difference excessive; the problem that sliding sleeve is opened in advance, the build the pressure anti-row of ball of upper level has been realized at the oblique angle, lower end of above-mentioned ditrysian type ball seat in addition.
A kind of ditrysian type ball seat provided by the utility model, described ditrysian type ball seat 6 is fixedly installed in sliding sleeve; Described ditrysian type ball seat 6 comprises a pair of ball hole, and described two ball holes are arranged on the same level in sliding sleeve; On described two ball holes, lower edge is provided with transition inclined-plane and spherical arc 9; The diameter adaptation of the ball 5 that builds the pressure of the diameter in described two ball holes and input.
In order to solve the technical problems such as ball is blocked that build the pressure, the upper lower edge in two ball holes of described ditrysian type ball seat 6 is provided with two transition inclined-planes: upper transition inclined-plane 8 and lower transition inclined-plane 10, and be provided with spherical arc 9 between upper transition inclined-plane 8 and ball hole.The upper transition inclined-plane 8 of ball seat can prevent from building the pressure in ball 5 folding processes occur by the card phenomenon; The radian that spherical arc 9 has can coordinate the radian of the ball 5 that builds the pressure, and its cambered surface increased the contact area with the ball 5 that builds the pressure, and under same pressure, the suffered contact stress of ball 5 that makes to build the pressure reduces, thereby has improved the bearing capacity of the ball 5 that builds the pressure.The ball that builds the pressure (be upper level build the pressure ball) that the lower transition inclined-plane 10 of ball seat can prevent from being arranged in the sliding sleeve bottom anti-row's process occur by the card phenomenon.
In concrete enforcement, the angle on described upper transition inclined-plane 8 and lower transition inclined-plane 10 is 20～45 °; The curvature of described spherical arc 9 is 50～70.
In order to realize fixing, described ditrysian type ball seat 6 is fixedly installed in described sliding sleeve, and described ditrysian type ball seat 6 is fixedly connected with by screw thread with the inner sleeve 3 of sliding sleeve.
Described sliding sleeve comprises top connection 1, urceolus 2, inner sleeve 3, shear pin 4, lower contact 7, described top connection 1 is inboard joins with the sliding sleeve inner sleeve, the outside, lower end of this top connection 1 joins with urceolus 2 inboards, upper end, described urceolus 2 is provided with flowing hole, described inner sleeve 3 is fixed in urceolus 2 by shear pin 4, the outside, upper end of described lower contact 7 joins with urceolus 2 inboards, lower end, and these lower contact 7 inboards join with the sliding sleeve inner sleeve.
Concrete, described top connection 1 inboard arranges internal thread and fixes with the external screw thread with the sliding sleeve inner sleeve, the lower end arranged outside external screw thread of this top connection 1 is to fix with the inboard internal thread arranged in urceolus 2 upper ends, the upper end arranged outside external screw thread of described lower contact 7 is to fix with the inboard internal thread arranged in urceolus 2 lower ends, these lower contact 7 inboards arrange internal thread and fix with the external screw thread with the sliding sleeve inner sleeve, and the outside of ditrysian type ball seat 6 is provided with the internal thread that external screw thread and inner sleeve 3 inboards are provided with and fixes.
The utlity model has the ditrysian type ball seat, for fracturing fluid provides enough flow channels, avoided chock pressure difference, can be less with diameter (for 4-1/2 " sliding sleeve, single hole diameter≤42mm) the ball that builds the pressure is used in conjunction with, this ball seat has level and smooth transition inclined-plane, the phenomenon that the ball of having avoided building the pressure is blocked, the cambered surface of ball seat has increased the area contacted with the ball that builds the pressure, improved the bearing capacity of the ball that builds the pressure, the inner sleeve of this ball seat and sliding sleeve is fixed by screw thread, the ditrysian type ball seat has increased pressure break progression, and can realize the build the pressure anti-row of ball of upper level, increase construction simultaneously and finished the required area of draining.
The accompanying drawing explanation
Fig. 1 is that the master who the utlity model has ditrysian type ball seat fracturing sliding bush looks the half section structural representation.
Fig. 2 is the structural representation that the utlity model has the ditrysian type ball seat of ditrysian type ball seat fracturing sliding bush.
Description of reference numerals:
The 1-top connection, 2-urceolus, 3-inner sleeve, 4-shear pin, the 5-ball that builds the pressure, 6-ditrysian type ball seat, the upper transition of 7-lower contact 8-inclined-plane, 9-spherical arc, transition inclined-plane under 10-
The specific embodiment
The fracturing sliding bush with ditrysian type ball seat as depicted in figs. 1 and 2, it comprises top connection 1, urceolus 2, inner sleeve 3, ball seat, lower contact 7, described top connection 1 inboard arranges internal thread and fixes with the external screw thread with the sliding sleeve inner sleeve, the lower end arranged outside external screw thread of this top connection 1 is to fix with the inboard internal thread arranged in urceolus 2 upper ends, described urceolus 2 is provided with flowing hole, for fracturing fluid provides flow channels, described inner sleeve 3 is fixed in urceolus 2 by shear pin 4, the upper end arranged outside external screw thread of described lower contact 7 is to fix with the inboard internal thread arranged in urceolus 2 lower ends, these lower contact 7 inboards arrange internal thread and fix with the external screw thread with the sliding sleeve inner sleeve, described ball seat is ditrysian type ball seat 6, its outside is provided with the internal thread that external screw thread and inner sleeve 3 inboards are provided with and fixes, this ditrysian type ball seat 6 comprises two ball holes that are arranged at respectively this ball seat both sides equal-height position, upper transition inclined-plane 8, spherical arc 9 and lower transition inclined-plane 10, described spherical arc 9 is between upper transition inclined-plane 8 and lower transition inclined-plane 10, should upper transition inclined-plane 8 can prevent from building the pressure in ball 5 folding processes occur by the card phenomenon, the radian that spherical arc 9 has can coordinate the radian of ball 5 that builds the pressure, and has increased and the contact area of ball 5 that builds the pressure, thereby has increased the bearing capacity of the ball 5 that builds the pressure, the ball that builds the pressure (be upper level build the pressure ball) that the lower transition inclined-plane 10 of ball seat can prevent from being arranged in the sliding sleeve bottom anti-row's process occur by the card phenomenon.
Carry out the ground experiment of fracturing sliding bush, take 4-1/2 " sliding sleeve is the example explanation; adopt the different monotrysian type sliding sleeve in a plurality of ball seats aperture and ditrysian type sliding sleeve according to aperture order series connection from big to small tested; this experiment be take aperture 38mm as boundary; the sliding sleeve that aperture is less than or equal to 38mm is the ditrysian type sliding sleeve; the sliding sleeve that aperture is greater than 38mm is the monotrysian type sliding sleeve, and not-go-end is differential sliding sleeve.Above-mentioned fracturing sliding bush all is positioned at horizontal well and is connected into horizontal tubing string, in opening the process of differential sliding sleeve, phenomenon does not appear opening in the ditrysian type sliding sleeve that aperture is less than or equal to 38mm, it is the sliding sleeve that its pressure is more than or equal to not-go-end, but aperture is greater than the monotrysian type sliding sleeve of 38mm phenomenon occurred opening in advance, it is the sliding sleeve that its pressure is less than not-go-end, above-mentioned phenomenon shows to have chock pressure difference in the process of pressure break, the ball that builds the pressure of two couplings (the present embodiment is the ball that builds the pressure of diameter 38mm) is at liquid, it is the ball seat place that can arrive smoothly the shaft bottom coupling under of the fracturing fluid pumping, and shutoff two ball holes, the sliding sleeve top of this grade just can form closed containing cavity, thereby can be built the pressure, open this sliding sleeve flowing hole and above-mentioned two balls that build the pressure can be sent into to same pressure break level in well.Above evidence, ditrysian type sliding sleeve of the present utility model, its flowing hole is not opened in advance, has overcome the pressure reduction effect, and the ball that builds the pressure that can be less with diameter is used in conjunction with.
Claims (6)
1. a ditrysian type ball seat, is characterized in that, described ditrysian type ball seat (6) is fixedly installed in sliding sleeve; Described ditrysian type ball seat (6) comprises a pair of ball hole, and described two ball holes are arranged on the same level in sliding sleeve; On described two ball holes, lower edge is provided with transition inclined-plane and spherical arc (9); The diameter adaptation of the ball that builds the pressure (5) of the diameter in described two ball holes and input.
2. a kind of ditrysian type ball seat according to claim 1, is characterized in that,
The upper lower edge in two ball holes of described ditrysian type ball seat (6) is provided with two transition inclined-planes: upper transition inclined-plane (8) and lower transition inclined-plane (10), and be provided with spherical arc (9) between upper transition inclined-plane (8) and ball hole.
3. a kind of ditrysian type ball seat according to claim 2, is characterized in that,
The angle on described upper transition inclined-plane (8) and lower transition inclined-plane (10) is 20～45 °; The curvature of described spherical arc (9) is 50～70.
4. a kind of ditrysian type ball seat according to claim 1, is characterized in that,
Described ditrysian type ball seat (6) is fixedly installed in described sliding sleeve, and described ditrysian type ball seat (6) is fixedly connected with by screw thread with the inner sleeve (3) of sliding sleeve.
5. according to the described a kind of ditrysian type ball seat of claim 1 or 4, it is characterized in that,
Described sliding sleeve comprises top connection (1), urceolus (2), inner sleeve (3), shear pin (4), lower contact (7), described top connection (1) is inboard joins with the sliding sleeve inner sleeve, the outside, lower end of this top connection (1) joins with urceolus (2) inboard, upper end, described urceolus (2) is provided with flowing hole, described inner sleeve (3) is fixed in urceolus (2) by shear pin (4), the outside, upper end of described lower contact (7) joins with urceolus (2) inboard, lower end, and this lower contact (7) is inboard joins with the sliding sleeve inner sleeve.
6. a kind of ditrysian type ball seat according to claim 5 is characterized in that:
Described top connection (1) inboard arranges internal thread and fixes with the external screw thread with the sliding sleeve inner sleeve, the lower end arranged outside external screw thread of this top connection (1) is to fix with the inboard internal thread arranged in urceolus (2) upper end, the upper end arranged outside external screw thread of described lower contact (7) is to fix with the inboard internal thread arranged in urceolus (2) lower end, this lower contact (7) inboard arranges internal thread and fixes with the external screw thread with the sliding sleeve inner sleeve, and the outside of ditrysian type ball seat (6) is provided with the internal thread that external screw thread and inner sleeve (3) inboard be provided with and fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201284779U CN203321473U (en) | 2013-03-20 | 2013-03-20 | Dual-hole ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201284779U CN203321473U (en) | 2013-03-20 | 2013-03-20 | Dual-hole ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203321473U true CN203321473U (en) | 2013-12-04 |
Family
ID=49660836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201284779U Expired - Lifetime CN203321473U (en) | 2013-03-20 | 2013-03-20 | Dual-hole ball seat |
Country Status (1)
| Country | Link |
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| CN (1) | CN203321473U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507868A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Ball seat of ball injection activated sliding sleeve, manufacture method of ball seat and sliding sleeve |
| CN105735941A (en) * | 2014-12-12 | 2016-07-06 | 中国石油天然气股份有限公司 | Ball seat |
| CN106930742A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | Opening method of damaged fracturing sliding sleeve |
| CN110397586A (en) * | 2019-08-12 | 2019-11-01 | 宝鸡和新机电设备有限公司 | Modified spring-loaded plunger for pluger type hydraulic pump |
| WO2020037033A1 (en) * | 2018-08-15 | 2020-02-20 | Baker Hughes, A Ge Company, Llc | Top tooth ball seat |
-
2013
- 2013-03-20 CN CN2013201284779U patent/CN203321473U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507868A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Ball seat of ball injection activated sliding sleeve, manufacture method of ball seat and sliding sleeve |
| CN105735941A (en) * | 2014-12-12 | 2016-07-06 | 中国石油天然气股份有限公司 | Ball seat |
| CN105735941B (en) * | 2014-12-12 | 2018-05-08 | 中国石油天然气股份有限公司 | Ball seat |
| CN106930742A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | Opening method of damaged fracturing sliding sleeve |
| WO2020037033A1 (en) * | 2018-08-15 | 2020-02-20 | Baker Hughes, A Ge Company, Llc | Top tooth ball seat |
| US10851619B2 (en) | 2018-08-15 | 2020-12-01 | Baker Hughes, A Ge Company, Llc | Top tooth ball seat |
| CN110397586A (en) * | 2019-08-12 | 2019-11-01 | 宝鸡和新机电设备有限公司 | Modified spring-loaded plunger for pluger type hydraulic pump |
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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 |
Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |