CN202338320U - Tubular column for improving separate-stratum fracturing in well completion of casing sliding sleeve - Google Patents
Tubular column for improving separate-stratum fracturing in well completion of casing sliding sleeve Download PDFInfo
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- CN202338320U CN202338320U CN2011203942694U CN201120394269U CN202338320U CN 202338320 U CN202338320 U CN 202338320U CN 2011203942694 U CN2011203942694 U CN 2011203942694U CN 201120394269 U CN201120394269 U CN 201120394269U CN 202338320 U CN202338320 U CN 202338320U
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Abstract
The utility model discloses a tubular column for improving separate-stratum fracturing in well completion of a casing sliding sleeve, which is applied in stratum fracturing of an oil field. The tubular column is characterized in that a first casing sliding sleeve is connected with the lower end of an oil pipe; the lower end of the first casing sliding sleeve is connected with a second casing sliding sleeve by an oil pipe; a pressure guiding pipeline is arranged between the first casing sliding sleeve and the second casing sliding sleeve, and is fixed on the outer wall of the oil pipe by adopting a clamping hoop; the lower end of the second casing sliding sleeve is connected with a third casing sliding sleeve by an oil pipe, so that a plurality of casing sliding sleeves are connected; the quantity of the connecting casing sliding sleeves is between 3 and 50; the lower end of the lower casing sliding sleeve is connected with a start sliding sleeve by an oil pipe, and a pressure guide line is connected between the lower casing sliding sleeve and the start sliding sleeve; the lower end of the start sliding sleeve is connected with a float collar by an oil pipe; and the lower end of the float collar is connected with a floating shoe. The tubular column has the advantages that no matter what the size of a borehole is, steel balls with the same diameter can be put to realize separate-stratum fracturing improvement, so that the construction period is shortened, the cost is saved, and the secondary pollution to the stratum is reduced.
Description
Technical field
The utility model relates to multilevel hierarchy fracturing reform under oil gas well straight well (special well) the cased hole completion mode and the process pipe string that designs, can realize not limitting the separate stratum fracfturing transformation of progression.
Background technology
At present, domestic sleeve in oil field well multistage fracturing reform mode mainly contains two big types: the one, and cable perforation, mechanical packer realize the packing between interval, through opening the pressure break sliding sleeve successively, accomplish the multistage fracturing transformation; The 2nd, carry out hydraulic perforation through the jetting fracturing tool, utilize the hydraulic jet effect to realize the interlayer packing, spray pressure break and accomplish multistage transformation.More than mainly adopt during two kinds of technique subsections the ball sealer of throwing ascending different size to accomplish the unlatching of sliding sleeve sandblasters at different levels and the isolation of the section of transformation; But owing to receive the restriction of well head, pit shaft, operating tool string, instrument design size etc.; Even through technology, instrument continue to optimize and perfect, also only can accomplish the separate stratum fracfturing transformation of finite progression.Simultaneously, what these technologies often adopted is the integrated of pressure break and production, owing to receive the restriction of technology, downhole tool design, these technologies generally do not possess the function of later stage control production, selectivity exploitation yet.Along with the development of oil gas field, the separate stratum fracfturing reforming technology of finite progression just is difficult to satisfy the demand of the more multistage several fracturing reforms of oil gas well, needs exploratory development to adapt to the more oil gas field separate stratum fracfturing reforming technology technology of multilayer number.
The utility model content
The purpose of the utility model is: provide a kind of sleeve pipe sliding sleeve completion separate stratum fracfturing to transform tubing string, realization oil gas well straight well is not limit the separate stratum fracfturing transformation of progression.Satisfy the technological requirement that the oil gas field multistage fracturing is transformed.
The technical scheme that the utility model adopts is: tubing string is transformed in the separate stratum fracfturing of sleeve pipe sliding sleeve completion, mainly is made up of oil pipe, sleeve pipe sliding sleeve, pressure guiding pipeline, startup sliding sleeve, float collar and float shoe.It is characterized in that: be connected with the first sleeve pipe sliding sleeve in the lower end of oil pipe; Lower end at the first sleeve pipe sliding sleeve is connected with the second sleeve pipe sliding sleeve through oil pipe; Between the first sleeve pipe sliding sleeve and the second sleeve pipe sliding sleeve, be connected with pressure guiding pipeline, adopt clip described pressure guiding pipeline to be fixed on the outer wall of oil pipe; Lower end at the second sleeve pipe sliding sleeve connects the 3rd sleeve pipe sliding sleeve through oil pipe, so connects a plurality of sleeve pipe sliding sleeves; The quantity that the sleeve pipe sliding sleeve connects is between 3～50; Connect through oil pipe in the lower end of the sleeve pipe sliding sleeve of bottom and to start sliding sleeve, between the sleeve pipe sliding sleeve of bottom and startup sliding sleeve, be connected with pressure guiding pipeline; The lower end that starts sliding sleeve is connected with float collar through oil pipe, and the lower end of float collar is connected with float shoe.
At first with process pipe string down to oil gas well precompressed parting position.Drop into steel ball from well head then, steel ball falls into ball seat and the sealing that starts sliding sleeve; Open simultaneously and start sliding sleeve foundation control fluid passage, pressure break foot stratum simultaneously.After opening the startup sliding sleeve, pressure is reached upper level sleeve pipe sliding sleeve, upper level sleeve pipe sliding sleeve forms steel ball seat, and the steel ball of the same diameter of well head input is opened upper level sleeve pipe sliding sleeve, a stratum on the pressure break, and the like, finally realize the separate stratum fracfturing on whole stratum.Close a layer discharge opeing at last, ask product.If carry out the selectivity exploitation, bore the grinder tool by the coiled tubing band, after brill grinds off steel ball and steel ball seat, adopt the sliding sleeve switch instrument, open or close the sleeve pipe sliding sleeve.
Described sleeve pipe sliding sleeve comprises to be uploaded crimp head, uploads pressure passageway, top connection, fluid hole, outer sliding sleeve, inner sliding sleeve, inlet opening, shear pin, fairlead, lock ring, cylinder sleeve, go 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; Upload pressure passageway on the top connection upper end wall axial direction, 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; There is internal thread the upper end of uploading pressure passageway; Uploading the crimp head lower end has external screw thread, is fixed on through screw thread and uploads the pressure passageway top; Be evenly equipped with the pressure break passage of three axial long troughs on the top connection outer wall circumferencial direction; Be with outer sliding sleeve 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 the annular space chamber is communicated with outer end and to upload the pressure passageway lower ending opening relative, and connection with it; Outer sliding sleeve and inner sliding sleeve can slide outer sliding sleeve and inner sliding sleeve shutoff pressure break passage along the top connection inwall;
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;
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 last centre bore of supporting seat has two place's undergauges, between the undergauge centre bore by the taper seat transition; A reducing ball seat is arranged on the taper seat on top; The fairlead lower end is in 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, the outer conical surface of reducing ball seat lower end is identical with the angle of the supporting seat top transition circle conical surface;
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; There is internal thread following pressure transmission body centre bore lower end, and through the lower contact that has been threaded, there is external screw thread the lower contact lower end; Following connecting cylinder is a cylindrical shape, and the lower end of following connecting cylinder is enclosed within down in the pressure transmission body, and the upper end is enclosed between the lower end and supporting seat of connecting cylinder, 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; 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 internal thread following pressure transmission joint lower end.
Described reducing ball seat adopts aluminum alloy materials to process.
The structure of described startup sliding sleeve and sleeve pipe sliding sleeve is basic identical, and what difference was that the sleeve pipe sliding sleeve adopts is the reducing ball seat; And the employing of startup sliding sleeve is the annular ball seat.
The beneficial effect of the utility model: tubing string is transformed in the separate stratum fracfturing of the utility model sleeve pipe sliding sleeve completion, no matter borehole size is big or small, all can drops into the identical steel ball of external diameter and realize the separate stratum fracfturing transformation, has satisfied the technological requirement that the oil gas field multistage fracturing is transformed.After pressure break is accomplished, can steel ball and steel ball seat brill be ground off, directly carry out the sleeve pipe discharge opeing, reduce the time of liquid holdup reservoir, reduce secondary pollution the stratum.Any repeat switch sleeve pipe of the switching tools sliding sleeve that also available coiled tubing band is special-purpose carries out the selectivity exploitation.
Description of drawings
Fig. 1 is that the tubular column structure sketch map is transformed in the separate stratum fracfturing of the utility model sleeve pipe sliding sleeve completion.
Fig. 2 is sleeve pipe sliding sleeve 102 the first half structural profile sketch mapes.
Fig. 3 is sleeve pipe sliding sleeve 102 the latter half structural profile sketch mapes.
Fig. 4 is the A-A generalized section of Fig. 2.
Among the figure, the 101-oil pipe, 102-sleeve pipe sliding sleeve, the 103-pressure guiding pipeline, 104-starts sliding sleeve, 105-float collar, 106-float shoe.
The specific embodiment
Embodiment 1: transforming tubing string with a sleeve pipe sliding sleeve completion separate stratum fracfturing is example, and the utility model is done further explain.
Consult Fig. 1.Tubing string is transformed in the separate stratum fracfturing of the utility model sleeve pipe sliding sleeve completion, and tubing string is transformed in the separate stratum fracfturing of sleeve pipe sliding sleeve completion, mainly is made up of oil pipe 101, sleeve pipe sliding sleeve 102, pressure guiding pipeline 103, startup sliding sleeve 104, float collar 105 and float shoe 106.Be connected with the first sleeve pipe sliding sleeve 102 in the lower end of oil pipe 101; Lower end at the first sleeve pipe sliding sleeve 102 is connected with the second sleeve pipe sliding sleeve 102 through oil pipe; Between the first sleeve pipe sliding sleeve 102 and the second sleeve pipe sliding sleeve 102, be connected with pressure guiding pipeline 103, adopt clip that described pressure guiding pipeline 103 is fixed on the outer wall of oil pipe.Lower end at the second sleeve pipe sliding sleeve 102 connects the 3rd sleeve pipe sliding sleeve 102 through oil pipe, so is connected with four sleeve pipe sliding sleeves 102.Connect through oil pipe in the lower end of the sleeve pipe sliding sleeve 102 of bottom and to start sliding sleeve 104, between the sleeve pipe sliding sleeve 102 of bottom and startup sliding sleeve 104, be connected with pressure guiding pipeline 103.The lower end that starts sliding sleeve 104 is connected with a float collar 105 through oil pipe, and the lower end of float collar 105 is connected with a float shoe 106.
Consult Fig. 2.Sleeve pipe sliding sleeve 102 comprises to be uploaded 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, go 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. 4.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. 2.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. 3.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. tubing string is transformed in a sleeve pipe sliding sleeve completion separate stratum fracfturing, mainly is made up of oil pipe (101), sleeve pipe sliding sleeve (102), pressure guiding pipeline (103), startup sliding sleeve (104), float collar (105) and float shoe (106); It is characterized in that: be connected with the first sleeve pipe sliding sleeve (102) in the lower end of oil pipe (101); Lower end at the first sleeve pipe sliding sleeve (102) is connected with the second sleeve pipe sliding sleeve (102) through oil pipe; Between the first sleeve pipe sliding sleeve (102) and the second sleeve pipe sliding sleeve (102), be connected with pressure guiding pipeline (103), adopt clip that described pressure guiding pipeline (103) is fixed on the outer wall of oil pipe; Lower end at the second sleeve pipe sliding sleeve (102) connects the 3rd sleeve pipe sliding sleeve (102) through oil pipe, so connects a plurality of sleeve pipe sliding sleeves (102); The quantity that sleeve pipe sliding sleeve (102) connects is between 3～50; Connect through oil pipe in the lower end of the sleeve pipe sliding sleeve (102) of bottom and to start sliding sleeve (104), between the sleeve pipe sliding sleeve 102 of bottom and startup sliding sleeve (104), be connected with pressure guiding pipeline (103); The lower end that starts sliding sleeve (104) is connected with float collar (105) through oil pipe, and the lower end of float collar (105) is connected with float shoe (106).
2. tubing string is transformed in sleeve pipe sliding sleeve completion separate stratum fracfturing according to claim 1, it is characterized in that: described sleeve pipe sliding sleeve (102) comprises to be uploaded 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), go 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.
3. tubing string is transformed in sleeve pipe sliding sleeve completion separate stratum fracfturing according to claim 2, it 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 |
|---|---|---|---|
| CN2011203942694U CN202338320U (en) | 2011-10-17 | 2011-10-17 | Tubular column for improving separate-stratum fracturing in well completion of casing sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203942694U CN202338320U (en) | 2011-10-17 | 2011-10-17 | Tubular column for improving separate-stratum fracturing in well completion of casing sliding sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202338320U true CN202338320U (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203942694U Expired - Fee Related CN202338320U (en) | 2011-10-17 | 2011-10-17 | Tubular column for improving separate-stratum fracturing in well completion of casing sliding sleeve |
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| CN (1) | CN202338320U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696748A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation |
| CN103806888A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Downhole infinite level digital control fracture sliding sleeve |
| CN104420835A (en) * | 2013-08-23 | 2015-03-18 | 中国石油天然气股份有限公司 | Multi-cluster perforating and fracturing completion pipe string and construction method |
| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Bushing sliding sleeve and hydraulic bridge plug combined type completion pipe string and rapid fracturing method |
-
2011
- 2011-10-17 CN CN2011203942694U patent/CN202338320U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696748A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation |
| CN103696748B (en) * | 2012-09-28 | 2016-10-12 | 中国石油天然气股份有限公司 | Do not limit the intelligent well cementation sliding sleeve separate stratum fracfturing reforming technology tubing string of progression |
| CN103806888A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Downhole infinite level digital control fracture sliding sleeve |
| CN103806888B (en) * | 2012-11-12 | 2016-05-11 | 中国石油天然气股份有限公司 | Down-hole infinite series control fracturing sliding bush |
| CN104420835A (en) * | 2013-08-23 | 2015-03-18 | 中国石油天然气股份有限公司 | Multi-cluster perforating and fracturing completion pipe string and construction method |
| CN104420835B (en) * | 2013-08-23 | 2017-08-04 | 中国石油天然气股份有限公司 | Many cluster perforating and fracturing completion tubular columns and construction method |
| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Bushing sliding sleeve and hydraulic bridge plug combined type completion pipe string and rapid fracturing method |
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