CN202338279U - Variable-diameter fracturing valve - Google Patents
Variable-diameter fracturing valve Download PDFInfo
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- CN202338279U CN202338279U CN2011203946426U CN201120394642U CN202338279U CN 202338279 U CN202338279 U CN 202338279U CN 2011203946426 U CN2011203946426 U CN 2011203946426U CN 201120394642 U CN201120394642 U CN 201120394642U CN 202338279 U CN202338279 U CN 202338279U
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Abstract
The utility model discloses a variable-diameter fracturing valve which is applicable to fracturing reforming construction of an oil and gas field. An upper pressure transmission joint is fixed on the top of an upper pressure transmission channel; an upper joint is provided with an axial fracturing channel; an outer sliding sleeve and an inner sliding sleeve are arranged in the upper joint; the lower end of the upper joint is connected with a cylinder sleeve; an upper connection cylinder is sleeved in the cylinder sleeve; a guide sleeve is sleeved in the upper connection cylinder; the upper connection cylinder is connected with the guide sleeve through a shear pin; a supporting seat is in threaded connection with the upper connection cylinder and is arranged in the upper connection cylinder; a variable-diameter ball seat is arranged in the supporting seat; the cylinder sleeve is in threaded connection with a lower pressure transmission body; the upper end of the lower pressure transmission body is connected with a lower connection cylinder; the lower pressure transmission body is provided with a lower pressure transmission channel; a lower pressure transmission joint is arranged at the lower end of the lower pressure transmission channel; and the lower end of the lower pressure transmission body is connected with a lower joint. The variable-diameter fracturing valve has the advantages that the variable-diameter ball seat sequentially shrinks in the fracturing process to form a ball seat, sealing balls with the same diameter are put repeatedly, the fracturing valve is turned on to sequentially finish multi-time fracturing without limitation of borehole diameter, and unlimited section fracturing construction of tubular column descending for one time is realized.
Description
Technical field
The utility model relates to oil-gas field fracturing rebuilding construction technical field, particularly a kind of pressure break valve, but be a kind of reducing pressure break valve that is applicable to oil gas field multi-section multi-layer fracturing reform.
Background technology
At present; Cable perforation, mechanical packer separate stratum fracfturing and hydraulic jet perforation separate stratum fracfturing technology are mainly adopted in the transformation of domestic sleeve in oil field well multiple fracturing; The isolation of all adopting the ball sealer of throwing ascending different size to accomplish the unlatching of each layer sliding sleeve (sandblaster) and transformed layer; But owing to receive the restriction of well head, pit shaft, operating tool string, instrument design size etc., though through technology, instrument continue to optimize and perfect, also only can accomplish the separate stratum fracfturing transformation of the limited number of plies.
Along with the development of oil gas field, more than the technology can not satisfy the more transformation needs of multilayer number.Therefore,, developed a kind of pressure break valve of not limitting progression, can realize not limitting the progression separate stratum fracfturing to transform, had development prospect preferably in order to improve the pressure break hop count.Be lowered to the pressure break valve with sleeve pipe, during pressure break, at first perforation first floor and pressure break, opening for first order pressure break valve provides fluid passage.Drop into ball sealer then, open first order pressure break valve and shutoff construction layer, simultaneously, operation pressure makes upper level reducing ball seat undergauge through pressure guiding pipeline, forms ball seat, the pressure break second layer; Accomplish the multilayer transformation successively.One Chinese patent application numbers 201020187726 provides a kind of spherically seated pressure break sliding sleeve, relates to oil well staged fracturing liquid conversion control device technical field.It comprises top connection, splicing sleeve, sliding sleeve pipe, split ring, ball seat and lower contact.It is low to have the operational pressure of unlatching, and ball seat does not fall into the shaft bottom, the advantage that can not impact for the construction in later period operation.This technological deficiency is the restriction that the sliding sleeve size is increased by ball size step by step, can only realize the separate zone stimulation of finite progression; The pressure break sliding sleeve need carry out perforation in the oil pipe lower going-into-well, pressure break again, and construction sequence is many.One Chinese patent application ZL200820123843.0 provides a kind of pressure break with high pressure sandblast sliding sleeve, and pressure break is fixed in the separate stratum fracfturing tubing string with high pressure sandblast sliding sleeve, suppresses through pitching and realizes opening the flank passage, accomplishes between the oil jacket and links up.This simple in structure, quick detachable and assembling.Be applicable to that oil machinery looks in the operations such as water blockoff, branch (choosing) lamination split, acidifying.This technological deficiency is the restriction that the sliding sleeve size is increased by ball size step by step equally, can't realize the separate zone stimulation of infinite series, can't satisfy the growth requirement of present oil gas field.
Summary of the invention
The purpose of the utility model is: but a kind of reducing pressure break valve is provided, be connected on the tubing string, can realize not limitting the separate stratum fracfturing transformation of progression, satisfy the needs of oil gas field multistage fracturing reform.But in the fracturing process reducing pressure break valve place successively reducing form ball seat, can repeatedly drop into the ball sealer of same diameter, open the pressure break valve and accomplish repeatedly pressure break successively, do not receive the restriction of hole diameter, can realize being lowered to infinitely section pressing crack construction of one-trip string.The restriction that pressure break valve inner sliding sleeve size is increased by ball sealer no longer step by step realizes latus rectums such as whole tubing string.Drop into the ball sealer of same diameter, realize not limitting the separate stratum fracfturing transformation of progression.
The technical scheme that the utility model adopts is: but reducing pressure break valve comprises and uploads crimp head, uploads pressure passageway, top connection, fluid hole, outer sliding sleeve, inner sliding sleeve, inlet opening, shear pin, fairlead, lock ring, cylinder sleeve, goes up connecting cylinder, reducing ball seat, supporting seat, pressure break passage, connecting cylinder, pressure transmission passage, pressure transmission body, pressure transmission joint and lower contact down down down down; It is characterized in that: the upper end centre bore of top connection has internal thread, can be connected on the pressure break casing string.An axial pressure passageway of uploading is arranged on the top connection upper end wall, and the upper end of uploading pressure passageway is communicated with the centre bore of uploading crimp head; The lower end of uploading pressure passageway is communicated with the centre bore of top connection.Uploading the crimp head lower end has external screw thread, uploads the crimp head screw thread and fixedly uploads the pressure passageway top, and uploading the crimp head upper end has internal thread, can connect pressure guiding pipeline; Be evenly equipped with the pressure break passage of three axial long troughs on the top connection outer wall; Outer sliding sleeve is arranged in the top connection, be with inner sliding sleeve in the outer sliding sleeve, outer sliding sleeve and inner sliding sleeve are cylindrical shape; The annular space chamber is arranged between outer sliding sleeve and the inner sliding sleeve; Outer sliding sleeve and inner sliding sleeve are integrally welded, and a radially fluid hole is arranged on the outer sliding sleeve wall, in fluid hole both sides and " O " RunddichtringO is arranged on the outer sliding sleeve outer wall up and down.Fluid hole inner with interior outer sliding sleeve between annular chamber is communicated with fluid hole outer end and upload the pressure passageway lower ending opening, and connection with it to right; Outer sliding sleeve and inner sliding sleeve can slide along the top connection inwall, and outer sliding sleeve and inner sliding sleeve block the pressure break passage.Outer sliding sleeve and inner sliding sleeve can be opened the pressure break passage to lower slider, link up the stratum, can carry out pressing crack construction.Outer sliding sleeve and inner sliding sleeve have been opened and have been uploaded pressure passageway in the time of lower slider, and highly pressurised liquid is by uploading pressure passageway, but reach upper level reducing pressure break valve through pressure guiding pipeline, but prepare for upper level reducing pressure break valve pressing crack construction.
There is external screw thread the lower end of top connection, is connected with a columnar cylinder sleeve in the lower end of top connection; In cylinder sleeve, be with connecting cylinder on, the annular space chamber is arranged between last connecting cylinder and the cylinder sleeve; There is internal thread last connecting cylinder upper end, and there is external screw thread the outer sliding sleeve lower end, and the outer sliding sleeve lower end is threaded with last connecting cylinder upper end.In last connecting cylinder, be with fairlead, the outer wall of fairlead is a stairstepping, and fairlead top smaller diameter end is enclosed within on the inwall of outer sliding sleeve, and " O " RunddichtringO is arranged between fairlead and the outer sliding sleeve; The annular step surface of fairlead is the upper surface of piston; On last connection barrel, inlet opening is radially arranged, inlet opening be positioned at the piston upper surface; Link together through shear pin between last connecting cylinder and the fairlead, in the bottom of shear pin and " O " RunddichtringO arranged between fairlead and last connecting cylinder; Next stage is caught the piston upper surface that the high pressure liquid physical efficiency of coming reaches inlet opening through the annular space chamber between last connecting cylinder and the cylinder sleeve and arrives fairlead; When pressure rises to the shear strength of shear pin; Shear pin is cut off, fairlead along at last connecting cylinder inwall to lower slider.Simultaneously, fairlead drives the tooth form button downward stepping of lock ring on the last connecting cylinder inwall.
On last connecting cylinder inwall, screw thread is arranged, supporting seat is threaded with last connecting cylinder, and described supporting seat is a cylindrical shape, and supporting seat is in last connecting cylinder; The upper end centre bore of supporting seat has two place's undergauges, and the undergauge place is by the taper seat transition; A reducing ball seat is arranged on the taper seat on top; The fairlead lower end is enclosed within the supporting seat, and fairlead outer wall and supporting seat inwall are slidingly matched; And the lower surface of fairlead contacts with the upper surface of reducing ball seat; Said reducing ball seat be shaped as an annular jaggy, there is outer conical surface the lower end of reducing ball seat, reducing ball seat lower end outer conical surface is identical with the angle of the supporting seat upper end transition circle conical surface; When fairlead during to lower slider, promote the reducing ball seat along the last taper seat of supporting seat to lower slider, the breach of reducing ball seat is closed, internal diameter diminishes, the formation ball seat; The ball sealer that drops into from well head can seat on the reducing ball seat, shutoff lower floor.
There is internal thread the lower end of cylinder sleeve, and screw thread is connected with the following pressure transmission body of annular in the lower end of cylinder sleeve; Following pressure transmission body centre bore lower end screw thread is connected with lower contact, and there is external screw thread the lower contact lower end, can be connected on the pressure break casing string; Following connecting cylinder is a cylindrical shape, and following connecting cylinder lower end is enclosed within the pressure transmission body, and the upper end is enclosed between connecting cylinder lower end and the supporting seat, between the upper end outer wall of following connecting cylinder and the last connecting cylinder lower end inwall " O " RunddichtringO is arranged; Between the upper end inwall of following connecting cylinder and the supporting seat lower end outer wall " O " RunddichtringO is arranged; Last connecting cylinder can slide between cylinder sleeve and following connecting cylinder.An annular pressure transmission chamber is arranged between inboard wall of cylinder liner and following connecting cylinder outer wall; Down on the pressure transmission body lower end wall an axial following pressure transmission passage is being arranged, the upper end of following pressure transmission passage is communicated with annular pressure transmission chamber between cylinder sleeve and the following connecting cylinder.There is internal thread following pressure transmission passage lower end, and screw thread is fixed with a following pressure transmission joint in following pressure transmission passage lower end; There is screw thread following pressure transmission joint centre bore lower end, can connect pressure guiding pipeline.
In order to reduce the pressing crack construction risk, fairlead can be fixed in the connecting cylinder, after lower slider with established ball seat locking.Between last connecting cylinder inwall and fairlead, the lock ring groove is arranged, the lock ring of unidirectional stepping is arranged in the lock ring groove.Lock ring is annular; Inner and outer wall all has unidirectional stepping button; And unidirectional stepping button is in the opposite direction, and the tooth form of lock ring outer wall can only be along the downward stepping of internal thread groove of last connecting cylinder, and can not upwards withdraw from; The tooth form of lock ring inwall is connected with the external screw thread groove of fairlead, and fairlead can not be along the downward stepping of the tooth form of lock ring inwall.When fairlead was promoted by piston force, fairlead can only drive the tooth form button downward stepping of lock ring along last connecting cylinder inwall, promoted the path that the reducing ball seat gets into supporting seat; Form ball seat; Mutual self-locking takes place in fairlead and last connecting cylinder, and fairlead can not move up, and causes ball seat to form and loses efficacy.
In order to realize down-hole string all-pass footpath, the utility model reducing ball seat adopts aluminum alloy materials, is prone to bore.After brill grinds off ball sealer and reducing ball seat, can realize pipe string all-pass footpath, down-hole, be beneficial to the later stage operation.
But the operating principle of summary reducing pressure break valve: consult Fig. 1 and Fig. 2.When but reducing pressure break valve was gone into the well, multistage variable footpath pressure break valve was threaded onto on the fracturing string, but and the following pressure transmission joint 20 of next stage reducing pressure break valve be connected a pressure guiding pipeline between the crimp head 1 with uploading of upper level.With clip pressure guiding pipeline is stuck on the casing wall.
When the variable footpath of certain one-level pressure break valve carries out pressure break; The highly pressurised liquid that the pressure guiding pipeline that following pressure transmission joint 20 connects transmits gets into pressure transmission passage 18 down through pressure transmission joint 20 down, and gets into cylinder sleeve 12, goes up the annular space chamber of forming between connecting cylinder 13 and the following connecting cylinder 17, and entering inlet opening 7; Liquid arrives the piston upper surface of fairlead 10; Under the downward thrust that hydraulic pressure produces, to cut off pin 8 and cut off, fairlead 10 is to lower slider; Rely on lock ring 11 and last connecting cylinder 13 mutual self-lockings, fairlead 10 can only move downward and can not move round about.Fairlead 10 promotes reducing ball seats 14 downwards, and reducing ball seat 14 is pressed into the path of supporting seat 15, and reducing ball seat 14 dwindles radially that breach is closed simultaneously, and reducing ball seat 14 forms ball seats.In a single day ball seat forms, and reducing ball seat 14 just can not move up again.Drop into ball sealer from well head, ball sealer drops to reducing ball seat 14 places that radially dwindle and is hampered shutoff lower floor.At this moment, continue in the sleeve pipe to build the pressure, the fluid pressure in the sleeve pipe promotes supporting seat 15, and the last connecting cylinder 13 of drive, outer sliding sleeve 5 and inner sliding sleeve 6 together move down.When the top of outer sliding sleeve 5 and inner sliding sleeve 6 slides into the pressure break passage below 16, the pressure break passage 16 of top connection 3 makes that sleeve pipe is inside and outside to be communicated with.Realize fracturing work from pressure break passage 16 entering stratum from the highly pressurised liquid that well head injects.
But be communicated with through pressure guiding pipeline between the following pressure transmission joint 20 of uploading crimp head 1 and adjacent upper level reducing pressure break valve of the variable footpath of certain one-level pressure break valve.When the variable footpath of certain one-level pressure break valve carried out pressure break, outer sliding sleeve 5 together moved down with inner sliding sleeve 6.When being moved down into, the upper surface of outer sliding sleeve 5 and inner sliding sleeve 6 uploads pressure passageway 2 lower ends; Uploading pressure passageway 2 is communicated with top connection 3 centre bores; Highly pressurised liquid is uploaded crimp head 1 from uploading pressure passageway 2 entering; Through pressure guiding pipeline but pressure is reached the following pressure transmission joint 20 of upper level reducing pressure break valve, highly pressurised liquid gets into the following pressure transmission passage 18 of upper level.Through the last connecting cylinder 13 of upper level and the annular space chamber between the cylinder sleeve 12, get into the inlet opening 7 of upper level, arrive the piston upper surface of fairlead 10; Rise to the shearing force of shear pin 8 until pressure; The shear pin pin 8 of upper level is cut off, and the fairlead 10 of upper level moves down the upper cone face of upper level reducing ball seat 14 along supporting seat 15, advances the path of the supporting seat 15 of upper level; But the ball seat of upper level reducing pressure break valve forms, for upper level pitching pressure break is got ready.
For another set of pressure transmission mechanism is set, ensure the pressure transmission success rate, an annular space cavity is arranged between outer sliding sleeve 5 and inner sliding sleeve 6.When interior outer sliding sleeve is opened failure; Can adopt perforating gun perforation on inner sliding sleeve 6 walls; Highly pressurised liquid gets into outer sliding sleeve 5 and inner sliding sleeve 6 through the hole annular space chamber gets into from fluid hole 4 uploads pressure passageway 2, pressure is passed to upload crimp head 1, but and reach upper level reducing pressure break valve through pressure guiding pipeline.With perforating gun perforation on inner sliding sleeve 6 walls, those skilled in the art can accomplish.
The beneficial effect of the utility model: but utility model reducing pressure break valve can realize not limitting the separate stratum fracfturing transformation of progression, satisfies the needs of oil gas field multistage fracturing reform.The restriction that pressure break valve inner sliding sleeve size is increased by ball sealer no longer step by step realizes latus rectums such as whole tubing string.Like this, drop into the ball sealer of same specification, can realize not limitting the separate zone stimulation of progression.
Description of drawings
But Fig. 1 is the utility model reducing pressure break valve the first half structural profile sketch map.
But Fig. 2 is the utility model reducing pressure break valve the latter half structural profile sketch map.
Fig. 3 is the A-A generalized section of Fig. 1.
Among the figure, 1. upload crimp head, 2. upload pressure passageway, 3. top connection, 4. fluid hole, 5. outer sliding sleeve; 6. inner sliding sleeve, 7. inlet opening, 8. shear pin, 9.O RunddichtringO, 10. fairlead, 11. lock rings; 12. cylinder sleeve, connecting cylinder on 13., 14. reducing ball seats, 15. supporting seats, 16. pressure break passages; 17. following connecting cylinder, 18 pressure transmission passages, 19. times pressure transmission bodies, 20. times pressure transmission joints, 21. lower contacts.
The specific embodiment
Embodiment 1: but be example with a reducing pressure break valve, the utility model is done further explain.
Consult Fig. 1.But the utility model reducing pressure break valve comprises and uploads pressure head 1, uploads pressure passageway 2, top connection 3, fluid hole 4, outer sliding sleeve 5, inner sliding sleeve 6, inlet opening 7, shear pin 8, fairlead 10, lock ring 11, cylinder sleeve 12, goes up connecting cylinder 13, reducing ball seat 14, supporting seat 15, pressure break passage 16, connecting cylinder 17, pressure transmission passage 18, pressure transmission body 19, pressure transmission joint 20 and lower contact 21 down down down down.
There is internal thread the centre bore upper end of top connection 3, can be connected on the pressure break casing string; An axial pressure passageway 2 of uploading is arranged on top connection 3 upper end wall, and the passage internal diameter of uploading pressure passageway 2 is 5mm, long 158mm, and the upper end of uploading pressure passageway 2 is communicated with the centre bore of uploading crimp head 1; The lower end of uploading pressure passageway 2 is communicated with the centre bore of top connection 3; Uploading crimp head 1 lower end has external screw thread, is fixed on through screw thread and uploads pressure passageway 2 tops, and uploading crimp head 1 upper end has internal thread, can connect pressure guiding pipeline; Be evenly equipped with the pressure break passage 16 of three axial long troughs on top connection 3 outer walls, pressure break passage 16 long 140mm, wide 10mm.Outer sliding sleeve 5 is arranged in the top connection 3, be with inner sliding sleeve 6 in the outer sliding sleeve 5, outer sliding sleeve 5 is a cylindrical shape with inner sliding sleeve 6; Outer sliding sleeve 5 external diameter 140mm, inner sliding sleeve internal diameter 97mm has the annular space chamber of wide 2mm between outer sliding sleeve 5 and the inner sliding sleeve 6; Outer sliding sleeve 5 is integrally welded with inner sliding sleeve 6; A radially fluid hole 4 is arranged on outer sliding sleeve 5 walls, and the diameter of fluid hole 4 is 4mm, and about in the of 4 both sides and " O " RunddichtringO is arranged on outer sliding sleeve 5 outer walls at fluid hole.Fluid hole 4 inner with interior outer sliding sleeve between annular chamber is communicated with fluid hole 4 outer ends and to upload pressure passageway 2 lower ending openings relative, and connection with it; Outer sliding sleeve 5 can slide outer sliding sleeve 5 and inner sliding sleeve 6 shutoff pressure break passages 16 along top connection 3 inwalls with inner sliding sleeve 6.
There is external screw thread the lower end of top connection 3, is connected with a columnar cylinder sleeve 12 in the lower end of top connection 3; In cylinder sleeve 12, be with connecting cylinder 13 on, between last connecting cylinder 13 and the cylinder sleeve 12 the annular space chamber arranged, the high pressure liquid physical efficiency of next stage reaches inlet opening 7 through the annular space cavity and arrives the piston upper surface of fairlead 10, promotes fairlead 10 and moves down; There is internal thread last connecting cylinder 13 upper ends, and there is external screw thread outer sliding sleeve 5 lower ends, and outer sliding sleeve 5 lower ends are threaded with last connecting cylinder 13 upper ends.In last connecting cylinder 13, be with a fairlead 10, fairlead 10 internal diameter 97mm, the outer wall of fairlead 10 is a stairstepping, fairlead 10 top smaller diameter end are enclosed within on the inwall of outer sliding sleeve 5, and " O " RunddichtringO is arranged between fairlead 10 and the outer sliding sleeve 5; The annular step surface of fairlead 10 is upper surfaces of piston; On last connecting cylinder 13 walls, inlet opening 7 is radially arranged, inlet opening 7 diameters are 4mm, and the position of inlet opening 7 promptly is positioned at the upper surface of piston on the top of the annular step of fairlead 10; Link together through four equally distributed shear pins 8 between last connecting cylinder 13 and the fairlead 10, the diameter of shear pin 8 is 8mm, and material is No. 45 steel.In the bottom of shear pin 8 and " O " RunddichtringO 9 arranged between fairlead 10 and last connecting cylinder 13;
On last connecting cylinder 13 inwalls, screw thread is arranged, supporting seat 15 is threaded with last connecting cylinder 13, and described supporting seat 15 is a cylindrical shape, and supporting seat 15 is in last connecting cylinder 13; The upper end centre bore of supporting seat 15 has two place's undergauges, i.e. stepped central hole, and supporting seat 15 upper end centre bore internal diameters carry out the transition to the Zhongdao 96mm of 108mm by 115mm, have between the centre bore of undergauge by the taper seat transition.A reducing ball seat 14 is arranged on the taper seat on top; Fairlead 10 lower ends are in supporting seat 15, and fairlead 10 outer walls and supporting seat 15 inwalls are slidingly matched, and the lower surface of fairlead 10 contacts with the upper surface of reducing ball seat 14.Fairlead 10 promotes reducing ball seat 14 taper seat on the supporting seat 15 and gets into undergauge hole, top when lower slider, and reducing ball seat 14 breach are closed, and forming internal diameter is the ball seat of 89mm, and the undergauge hole, bottom of supporting seat 15 is that reducing ball seat 14 provides the location.From the ball sealer diameter of well head input is that 92mm sets on ball seat, shutoff lower floor.Ball sealer adopts aluminum alloy materials to process.Said reducing ball seat 14 is an annulus jaggy, and there is outer conical surface the lower end of reducing ball seat 14, and the outer conical surface of reducing ball seat 14 lower ends is identical with the angle of the supporting seat 15 transition circle conical surfaces.Consult Fig. 3.The external diameter of reducing ball seat 14 is 115mm, and internal diameter is 96mm, the wide 22mm of breach, and reducing ball seat 14 adopts aluminum alloy materials to process.Consult Fig. 1.Between last connecting cylinder 13 inwalls and fairlead 10, a lock ring groove is arranged, the lock ring 11 of unidirectional stepping is arranged in the lock ring groove.Lock ring 11 is annular, and lock ring 11 length are 20mm, wall thickness 7mm.Inner and outer wall all has unidirectional stepping button, and in the opposite direction.
Consult Fig. 2.There is internal thread the lower end of cylinder sleeve 12, and screw thread is connected with the following pressure transmission body 19 of annular in the lower end of cylinder sleeve 12; There is internal thread following pressure transmission body 19 centre bore lower ends, and following pressure transmission body 19 centre bore lower end screw threads are connected with cylindrical shape lower contact 21, and there is external screw thread lower contact 21 lower ends, can be connected on the pressure break casing string; Connecting cylinder 17 is a cylindrical shape; Following connecting cylinder 17 lower ends are enclosed within down in the pressure transmission body 19; The upper end is between the lower end and supporting seat 15 of last connecting cylinder 13; Between the upper end outer wall of following connecting cylinder 17 and the last connecting cylinder 13 lower end inwalls " O " RunddichtringO is arranged, between the upper end inwall of following connecting cylinder 17 and the supporting seat 15 lower end outer walls " O " RunddichtringO is arranged; Between cylinder sleeve 12 inwalls and following connecting cylinder 17 outer walls, an annular pressure transmission chamber is arranged; On pressure transmission body 19 lower end walls an axial following pressure transmission passage 18 is being arranged down, the internal diameter of following pressure transmission passage 18 is 5mm, long 158mm.The upper end of following pressure transmission passage 18 is communicated with annular pressure transmission chamber between cylinder sleeve 12 and the following connecting cylinder 17.There is internal thread following pressure transmission passage 18 lower ends, are fixed with a following pressure transmission joint 20 at following pressure transmission passage 18 lower end screw threads; There is internal thread following pressure transmission joint 20 lower ends.Can connect pressure guiding pipeline, the external diameter 8mm of pressure guiding pipeline, internal diameter 4mm.
Claims (3)
1. but reducing pressure break valve comprises and uploads crimp head (1), uploads pressure passageway (2), top connection (3), fluid hole (4), outer sliding sleeve (5), inner sliding sleeve (6), inlet opening (7), shear pin (8), fairlead (10), lock ring (11), cylinder sleeve (12), goes up connecting cylinder (13), reducing ball seat (14), supporting seat (15), pressure break passage (16), connecting cylinder (17), pressure transmission passage (18), pressure transmission body (19), pressure transmission joint (20) and lower contact (21) down down down down; It is characterized in that: the upper end centre bore of top connection (3) has internal thread; Upload pressure passageway (2) on top connection (3) the upper end wall axial direction, the upper end of uploading pressure passageway (2) is communicated with the centre bore of uploading crimp head (1); The lower end of uploading pressure passageway (2) is communicated with the centre bore of top connection (3); There is internal thread the upper end of uploading pressure passageway (2); Uploading crimp head (1) lower end has external screw thread, is fixed on through screw thread and uploads pressure passageway (2) top; Be evenly equipped with the pressure break passage (16) of three axial long troughs on top connection (3) the outer wall circumferencial direction; Be with outer sliding sleeve (5) in the top connection (3), be with inner sliding sleeve (6) in the outer sliding sleeve (5), outer sliding sleeve (5) and inner sliding sleeve (6) are cylindrical shape; Between outer sliding sleeve (5) and the inner sliding sleeve (6) the annular space chamber is arranged; Outer sliding sleeve (5) and inner sliding sleeve (6) are integrally welded, and a radially fluid hole (4) is arranged on outer sliding sleeve (5) wall, in fluid hole (4) both sides and on outer sliding sleeve (5) outer wall, " O " RunddichtringO is arranged up and down; Fluid hole (4) inner with interior outer sliding sleeve between the annular space chamber is communicated with outer end and to upload pressure passageway (2) lower ending opening relative, and connection with it; Outer sliding sleeve (5) can slide outer sliding sleeve (5) and inner sliding sleeve (6) shutoff pressure break passage (16) with inner sliding sleeve (6) along top connection (3) inwall;
There is external screw thread the lower end of top connection (3), is connected with a columnar cylinder sleeve (12) in the lower end of top connection (3); In cylinder sleeve (12), be with one and go up connecting cylinder (13), between last connecting cylinder (13) and the cylinder sleeve (12) the annular space chamber is arranged, there is internal thread last connecting cylinder (13) upper end, and there is external screw thread outer sliding sleeve (5) lower end, and outer sliding sleeve (5) lower end is threaded with last connecting cylinder (13) upper end; In last connecting cylinder (13), be with fairlead (10), the outer wall of fairlead (10) is a stairstepping, and fairlead (10) top smaller diameter end is enclosed within on the inwall of outer sliding sleeve (5), between fairlead (10) and the outer sliding sleeve (5) " O " RunddichtringO is arranged; The annular step surface of fairlead (10) is the upper surface of piston; Inlet opening (7) is radially arranged on last connecting cylinder (13) wall, inlet opening (7) be positioned at the piston upper surface; Link together through shear pin (8) between last connecting cylinder (13) and the fairlead (10), in the bottom of shear pin (8) and between fairlead (10) and last connecting cylinder (13), " O " RunddichtringO (9) is arranged;
On last connecting cylinder (13) inwall, screw thread is arranged, supporting seat (15) is threaded with last connecting cylinder (13), and described supporting seat (15) is a cylindrical shape, and supporting seat (15) is in last connecting cylinder (13); The last centre bore of supporting seat (15) has two place's undergauges, between the undergauge centre bore by the taper seat transition; A reducing ball seat (14) is arranged on the taper seat on top; Fairlead (10) lower end is in supporting seat (15), and fairlead (10) outer wall and supporting seat (15) inwall are slidingly matched; And the lower surface of fairlead (10) contacts with the upper surface of reducing ball seat (14); Said reducing ball seat (14) be shaped as an annular jaggy, there is outer conical surface the lower end of reducing ball seat (14), the outer conical surface of reducing ball seat (14) lower end is identical with the angle of supporting seat (15) the top transition circle conical surface;
There is internal thread the lower end of cylinder sleeve (12), is connected with the following pressure transmission body (19) of annular at the lower end screw thread of cylinder sleeve (12); There is internal thread following pressure transmission body (19) centre bore lower end, and through the lower contact that has been threaded (21), there is external screw thread lower contact (21) lower end; Following connecting cylinder (17) is a cylindrical shape; The lower end of following connecting cylinder (17) is enclosed within down in the pressure transmission body (19); The upper end is enclosed between the lower end and supporting seat (15) of connecting cylinder (13), between the upper end outer wall of following connecting cylinder (17) and last connecting cylinder (13) the lower end inwall " O " RunddichtringO is arranged; Between the upper end inwall of following connecting cylinder (17) and supporting seat (15) the lower end outer wall O RunddichtringO is arranged; Between cylinder sleeve (12) inwall and following connecting cylinder (17) outer wall, an annular pressure transmission chamber is arranged; Down on pressure transmission body (19) lower end wall an axial following pressure transmission passage (18) is being arranged, the upper end of following pressure transmission passage (18) is communicated with annular pressure transmission chamber between cylinder sleeve (12) and the following connecting cylinder (17); There is internal thread following pressure transmission passage (18) lower end, and screw thread is fixed with a following pressure transmission joint (20) in following pressure transmission passage (18) lower end; There is internal thread following pressure transmission joint (20) lower end.
2. but reducing pressure break valve according to claim 1 is characterized in that: between last connecting cylinder (13) inwall and fairlead (10), the lock ring groove is arranged, the lock ring (11) of unidirectional stepping is arranged in the lock ring groove; Lock ring (11) is annular, and inner and outer wall all has unidirectional stepping button.
3. but reducing pressure break valve according to claim 1 is characterized in that: described reducing ball seat (14) adopts aluminum alloy materials to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946426U CN202338279U (en) | 2011-10-17 | 2011-10-17 | Variable-diameter fracturing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946426U CN202338279U (en) | 2011-10-17 | 2011-10-17 | Variable-diameter fracturing valve |
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| Publication Number | Publication Date |
|---|---|
| CN202338279U true CN202338279U (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203946426U Expired - Lifetime CN202338279U (en) | 2011-10-17 | 2011-10-17 | Variable-diameter fracturing valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337862A (en) * | 2011-10-17 | 2012-02-01 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
| CN104234683A (en) * | 2014-09-12 | 2014-12-24 | 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 | Reducing mechanism |
| WO2015110486A1 (en) * | 2014-01-21 | 2015-07-30 | Tendeka As | Downhole flow control device and method |
| CN104975835A (en) * | 2015-06-11 | 2015-10-14 | 中国石油天然气股份有限公司 | Elastic fracturing ball seat |
| CN107587860A (en) * | 2017-10-31 | 2018-01-16 | 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 | A kind of double sliding sleeves based on compression packer set locking mechanism |
| CN108729895A (en) * | 2017-04-18 | 2018-11-02 | 中国石油天然气股份有限公司 | A kind of casing ball seat Multistage fracturing tool |
| CN114809986A (en) * | 2022-04-12 | 2022-07-29 | 中海油田服务股份有限公司 | Double-pipeline control hydraulic sliding sleeve and well completion tool |
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2011
- 2011-10-17 CN CN2011203946426U patent/CN202338279U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102337862A (en) * | 2011-10-17 | 2012-02-01 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
| CN102337862B (en) * | 2011-10-17 | 2014-01-15 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
| WO2015110486A1 (en) * | 2014-01-21 | 2015-07-30 | Tendeka As | Downhole flow control device and method |
| US11434722B2 (en) | 2014-01-21 | 2022-09-06 | Tendeka As | Downhole flow control device and method |
| CN104234683A (en) * | 2014-09-12 | 2014-12-24 | 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 | Reducing mechanism |
| CN104975835A (en) * | 2015-06-11 | 2015-10-14 | 中国石油天然气股份有限公司 | Elastic fracturing ball seat |
| CN104975835B (en) * | 2015-06-11 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of elastic pressure break ball seat |
| CN108729895A (en) * | 2017-04-18 | 2018-11-02 | 中国石油天然气股份有限公司 | A kind of casing ball seat Multistage fracturing tool |
| CN107587860A (en) * | 2017-10-31 | 2018-01-16 | 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 | A kind of double sliding sleeves based on compression packer set locking mechanism |
| CN107587860B (en) * | 2017-10-31 | 2019-11-08 | 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 | A kind of double sliding sleeves based on compression packer set locking mechanism |
| CN114809986A (en) * | 2022-04-12 | 2022-07-29 | 中海油田服务股份有限公司 | Double-pipeline control hydraulic sliding sleeve and well completion tool |
| CN114809986B (en) * | 2022-04-12 | 2024-02-13 | 中海油田服务股份有限公司 | Double-pipeline control hydraulic sliding sleeve and well completion tool |
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