CN103061733B - Sleeve valve type fracturing production-increasing tool - Google Patents

Sleeve valve type fracturing production-increasing tool Download PDF

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Publication number
CN103061733B
CN103061733B CN201310012382.5A CN201310012382A CN103061733B CN 103061733 B CN103061733 B CN 103061733B CN 201310012382 A CN201310012382 A CN 201310012382A CN 103061733 B CN103061733 B CN 103061733B
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CN
China
Prior art keywords
ball
pawl
valve
sleeve
clasp
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201310012382.5A
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Chinese (zh)
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CN103061733A (en
Inventor
祝效华
张向宁
刘清友
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Southwest Petroleum University
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Southwest Petroleum University
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Priority to CN201310012382.5A priority Critical patent/CN103061733B/en
Publication of CN103061733A publication Critical patent/CN103061733A/en
Application granted granted Critical
Publication of CN103061733B publication Critical patent/CN103061733B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a sleeve valve type fracturing production-increasing tool which can be used in directional wells and horizontal wells and has efficacy of freeness of mutual fleeing of fluid during sealing with well walls and recyclability of tools. The technical scheme includes that an upper snap ring joint of a three-rubber-sleeve packer is connected with a mandrel through a thread, the upper snap ring joint and a snap ring fasten a rubber sleeve to prevent shedding and extruding, a fracturing ball valve is connected with the three-rubber-sleeve packer through a thread, a short ball paw sleeve is fixed with an upper connector through a ball seat shear pin and covers a spray hole and is fixed with an outer ball paw through a screw, a rectangular through groove is arranged around the outer ball paw, and the upper connector is in threaded connection with a lower connector. The sleeve valve type fracturing production-increasing tool is high in sealability, high in safety of the rubber sleeve packer, simple in structure manufacturing of the fracturing ball valve and reusable and is used in well completion of oil-gas wells.

Description

A kind of cover valve type fracturing yield increasing instrument
Technical field
The present invention relates to the special downhole tool for conventional gas and oil, shale oil gas, fine and close oil gas, is a kind of cover valve type fracturing yield increasing instrument that not only can be used for directional well but also can be used for horizontal well.
Background technology
In modern oil gas well completion technology, cover valve type fracturing yield increasing instrument is widely used in horizontal well, the exploitation of directional well staged fracturing, reservoir reconstruction, well cementation fracturing technique, but push the operation form of set packer and supporting instrument to adopt release portion tubing string weight habitually in the past, under enter in process to occur premature setting (malfunction), as premature setting then must could continue to transfer by upper lifting pipe post deblocking, another kind then needs meet oil or meet water, and expanding, it is slow to set speed.In addition, instrument in the past and pressure break ability are often confined to three sections, maximum tens sections (but tool design is complicated, and need throwing more than ten to plant the ball of specification).Volume increase instrument in the past and operating type cost high, efficiency is low, and the block that China needs to do massive hydraulic fracturing volume increase has the features such as reservoir dispersion, low abundance, hyposmosis usually, urgent need be that integrated cost is low but the fracturing technique that operating efficiency is high and instrument.The operating efficiency of existing volume increase instrument and operating type thereof, operation economy and work capacity obviously cannot meet the massive hydraulic fracture demand of the oil-gas reservoirs such as China's hyposmosis, low abundance and shale gas.
For overlapping valve type fracturing yield increasing instrument Problems existing in massive hydraulic fracturing, devising and a kind ofly avoid setting by mistake and the efficient cover valve type fracturing yield increasing instrument of multilayer or super multilayer can be set simultaneously.This instrument adopts hydraulic setting mode to avoid down setting by mistake; The form of structure of design can be thrown a ball and be set multilayer simultaneously; Locking clamp deadlock structure in Tubing Packer ensure that packing element can not bounce back after extrusion, and the sealing borehole wall avoids fluid to alter layer, guarantees the service behaviour of packer under larger pressure reduction; Except the widgets such as ball valve, instrument major part parts are all reusable.
Summary of the invention
The object of the invention is :for solving the deficiencies in the prior art, spy provides a kind of and avoids setting by mistake and can set the efficient cover valve type fracturing yield increasing instrument of multilayer or super multilayer simultaneously.
For achieving the above object, the technical scheme that head it off of the present invention is taked is: a kind of cover valve type fracturing yield increasing instrument, by three Tubing Packer, pressure break ball valve, single Tubing Packer, ball pawl ball valve connects to form successively, it is characterized in that: the clasp top connection of three Tubing Packer is connected with spindle thread, clasp top connection and clasp fasten clasp packing element and prevent from coming off and extruding, the short ball pawl cover of pressure break ball valve is fixed by ball seat shear pin and upper binding head and hides spray-hole, fixed by screw and ectosphere pawl, ectosphere pawl surrounding has rectangular through slot, ground pitching is lowered in pressure break ball valve, open after being advanced into groove under promoting ectosphere pawl after cutting off ball seat shear pin, ectosphere pawl opens and allows pitching enter next stage, the interior ball pawl of ball pawl ball valve is placed in long ball pawl and overlaps and be stopped at rollback block.
The ratchet of lock ring top connection and the ratchet of lock ring piston of single Tubing Packer fix, and the rollback block of ball pawl ball valve is by rollback after groove, and interior ball pawl is passed through, and interior ball pawl and pitching pallet are fixed by screw.
Compared with prior art, the beneficial effect had is in the present invention: (1) can be avoided down setting by mistake; (2) form of structure designed can be thrown a ball and be set multilayer simultaneously; (3) the locking clamp deadlock structure in Tubing Packer ensure that packing element can not bounce back after extrusion, and the sealing borehole wall avoids fluid to alter layer, guarantees the service behaviour of packer under larger pressure reduction; (4) except the widgets such as ball valve, instrument major part parts are all reusable.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation overlapping valve type fracturing yield increasing instrument of the present invention;
Fig. 2 is the structural representation of the present invention three Tubing Packer 1 and pressure break ball valve 15;
Fig. 3 is the structural representation of list Tubing Packer 24 of the present invention and ball pawl ball valve 27;
Fig. 4 is the structural representation of pressure break ball valve 15A of the present invention local;
Fig. 5 is the structural representation of ball pawl ball valve 27B of the present invention local;
Fig. 6 is the three-dimensional structure schematic diagram of ectosphere pawl 21 of the present invention;
Fig. 7 is the three-dimensional structure schematic diagram of ball pawl 29 in the present invention;
Fig. 8 is the three-dimensional structure schematic diagram of pitching pallet 30 of the present invention.
In figure: 1. three Tubing Packer, 2. clasp top connection, 3. axle, 4. clasp packing element, 5. clasp, 6. sealing ring, 7. pressure guide hole, 8. lock ring piston, 9. locking clamp deadlock structure, 10. fixing pin, 11. clasp pistons, 12. extrusion rings, 13. locating snap rings, 14. shear pins, 15. pressure break ball valves, 16. upper binding heads, 17. ball seat shear pins, 18. short ball pawl covers, 19. spray-holes, 20. screws, 21. ectosphere pawls, 22. pitchings, 23. lower union joints, 24. single Tubing Packer, 25. lock ring top connections, 26. single packing elements, 27. ball pawl ball valves, 28. long ball pawl covers, ball pawl in 29., 30. pitching pallets, 31. rollback blocks.
Detailed description of the invention
By Fig. 1, Fig. 2, shown in Fig. 3, a kind of cover valve type fracturing yield increasing instrument, clasp top connection 2 and the axle 3 of three Tubing Packer 1 are threaded connection, clasp top connection 2 and clasp 5 fasten clasp packing element 4 and prevent from coming off and extruding, lock ring piston 8 upper end contacts with clasp 5 lower end, by end ratchet and middle lock stuck mechanism 9 ratchet up and down and end fixing pin 10 be fixedly connected with clasp piston 11, clasp piston 11 and extrusion ring 12 are fixed packing element and are prevented packing element colloid from extruding, three Tubing Packer 1 end stop rings 13 are equipped with shear pin 14 in order to deblocking packer, pressure break ball valve 15 upper end is connected with three Tubing Packer 1 lower ends by screw thread, short ball pawl overlaps 18 upper ends to be fixed by ball seat shear pin 17 and upper binding head 16 and is hidden spray-hole 19, centre is fixed by screw 20 and ectosphere pawl 21 upper end, ectosphere pawl 21 surrounding has rectangular through slot, upper binding head 16 end is connected with lower union joint 23 threaded upper ends, the lock ring top connection 25 of single Tubing Packer 24 is threaded connection with axle 3, the middle ratchet of lock ring top connection 25 end ratchet and lock ring piston 8 fixes, fixing pin 10 coordinates fixing, lock ring piston 8 and locating snap ring 13 fix single packing element 26, shear pin 14 end stop ring 13 is equipped with in order to deblocking packer, ball pawl ball valve 27 upper end is connected with single Tubing Packer 24 lower end by screw thread, long ball pawl overlaps 28 upper ends to be fixed by ball seat shear pin 17 and upper binding head 16 inwall and is hidden spray-hole 19, interior ball pawl 29 is placed in long ball pawl cover 28 and is stopped at rollback block 31, rollback block 31 is by rollback after groove, interior ball pawl 29 is allowed to pass through smoothly with pitching 22, interior ball pawl 29 surrounding has rectangular through slot and end and pitching pallet 30 are fixed by screw 20, upper binding head 16 end is connected with lower union joint 23 threaded upper ends.
By shown in Fig. 4 to Fig. 8, after three Tubing Packer 1 of cover valve type fracturing yield increasing instrument and pressure break ball valve 15 are lowered into object well depth, to sprain in tubing string pressure, by pressure guide hole 7 after pressure increase, promote lock ring piston 8 and clasp piston 11 reverse motions, and then cut off fixing pin 10, lock ring piston 8 promotes clasp 5 and extrudes clasp packing element 4, in like manner, clasp piston 11 and extrusion ring 12 extrude packing element simultaneously, the locking of ratchet up and down lock ring piston 8 and the ratchet on clasp piston 11 of locking clamp deadlock structure 9, keep swelling state to bounce back after ensure that packing element extruding, after three Tubing Packer 1 set, ground pitching 22 is lowered in pressure break ball valve 15, promote after cutting off ball seat shear pin 17 to open after ectosphere pawl is advanced into groove 21 times, ectosphere pawl 21 and short ball pawl overlap 18 to be fixed by screw 20, ectosphere pawl 21 surrounding has rectangular through slot and can open under a certain pressure and allow pitching 22 enter next stage, hydraulic jetting fracturing after all spray-holes 19 to be opened, after having constructed, the shear pin 14 in all three Tubing Packer 1 on locating snap ring 13 cut off by upper lifting pipe post, takes out down-hole string after packing element retraction, in like manner, after single Tubing Packer 24 is lowered into the object degree of depth with ball pawl ball valve 27, to sprain in tubing string pressure, by pressure guide hole 7 after pressure increase, after cutting off fixing pin 10, promotion lock ring piston 8 is descending extrudes single packing element 26 with locating snap ring 13 simultaneously, and lock ring top connection 25 and the ratchet on lock ring piston 8 ensure that single packing element keeps spreading to bounce back after extruding, after single Tubing Packer 24 sets, ground pitching 22 is lowered in ball pawl ball valve 27, after cutting off ball seat shear pin 17, promote pitching pallet 30, interior ball pawl 29, long ball pawl cover 28, rollback block 31 is descending, rollback block 31 enters rollback after groove, promote pitching pallet 30 descending with interior ball pawl 29, interior ball pawl 29 opens relief pitching 22 and enters next stage and be stopped at lower union joint step, hydraulic jetting fracturing after all spray-holes 19 to be opened, after having constructed, the shear pin 14 in all single Tubing Packer 24 on locating snap ring 13 cut off by upper lifting pipe post, down-hole string is taken out after packing element retraction.Enter well casing post and connect three Tubing Packer 1 successively at each interval, pressure break ball valve 15, single Tubing Packer 24, ball pawl ball valve 27; In like manner so syndeton is until final stage, and every section only needs a pitching 22; Upper lifting pipe post is only needed to take out instrument after pressure break is complete.

Claims (2)

1. a cover valve type fracturing yield increasing instrument, by three Tubing Packer (1), pressure break ball valve (15), single Tubing Packer (24), ball pawl ball valve (27) connects to form successively, it is characterized in that: the clasp top connection (2) of three Tubing Packer (1) is threaded with axle (3), clasp top connection (2) and clasp (5) fasten clasp packing element (4) and prevent from coming off and extruding, the short ball pawl cover (18) of pressure break ball valve (15) is fixed by ball seat shear pin (17) and upper binding head (16) and is hidden spray-hole (19), fixed by screw (20) and ectosphere pawl (21), ectosphere pawl (21) surrounding has rectangular through slot, ground pitching (22) is lowered in pressure break ball valve (15), cut off after being advanced into groove under ball seat shear pin (17) promotes ectosphere pawl (21) afterwards and open, ectosphere pawl (21) opens and allows pitching (22) enter next stage, the interior ball pawl (29) of ball pawl ball valve (27) is placed in long ball pawl cover (28) and is stopped at rollback block (31).
2. cover valve type fracturing yield increasing instrument according to claim 1, it is characterized in that: the ratchet of the lock ring top connection (25) of single Tubing Packer (24) and the ratchet of lock ring piston (8) fix, the rollback block (31) of ball pawl ball valve (27) is by rollback after groove, interior ball pawl (29) is passed through, and interior ball pawl (29) is fixed by screw (20) with pitching pallet (30).
CN201310012382.5A 2013-01-14 2013-01-14 Sleeve valve type fracturing production-increasing tool Expired - Fee Related CN103061733B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310012382.5A CN103061733B (en) 2013-01-14 2013-01-14 Sleeve valve type fracturing production-increasing tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310012382.5A CN103061733B (en) 2013-01-14 2013-01-14 Sleeve valve type fracturing production-increasing tool

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CN103061733B true CN103061733B (en) 2015-07-01

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110331969B (en) * 2019-06-14 2021-04-20 弗润联科(北京)石油科技有限公司 Cross-isolation type oil testing and repeated fracturing tool system
CN113914832B (en) * 2021-12-15 2022-03-01 东营市福利德石油科技开发有限责任公司 Horizontal well full-drift-diameter infinite-stage fracturing tool

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US6216785B1 (en) * 1998-03-26 2001-04-17 Schlumberger Technology Corporation System for installation of well stimulating apparatus downhole utilizing a service tool string
GB2435656B (en) * 2005-03-15 2009-06-03 Schlumberger Holdings Technique and apparatus for use in wells
CN2851554Y (en) * 2005-06-07 2006-12-27 长庆石油勘探局井下技术作业处 Sliding sleeve pressure-conducting valve
US20090260814A1 (en) * 2008-04-21 2009-10-22 Malone Bradley P System and Method to Facilitate Treatement and Sand Control in a Wellbore
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CN201474666U (en) * 2009-08-20 2010-05-19 新疆华油油气工程有限公司 Underground ball throwing control switch valve
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