CN105840163A - Ball seat assembly and ball-pitching sliding sleeve type fracturing device - Google Patents
Ball seat assembly and ball-pitching sliding sleeve type fracturing device Download PDFInfo
- Publication number
- CN105840163A CN105840163A CN201510020565.0A CN201510020565A CN105840163A CN 105840163 A CN105840163 A CN 105840163A CN 201510020565 A CN201510020565 A CN 201510020565A CN 105840163 A CN105840163 A CN 105840163A
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- Prior art keywords
- pressure break
- ball
- inner sleeve
- fracturing
- sleeve
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- 238000000034 method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 210000001109 blastomere Anatomy 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 230000007547 defect Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 14
- 238000012856 packing Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 9
- 239000000956 alloy Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
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- 239000012535 impurity Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 239000003721 gunpowder Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Abstract
The invention relates to a ball seat assembly and a ball-pitching sliding sleeve type fracturing device. The ball-pitching sliding sleeve type fracturing device comprises an inner sleeve, and outer sleeve, a fracturing ball, and the ball seat assembly. The inner sleeve is slidably sleeved in the outer sleeve. The inner sleeve and the outer sleeve are respectively provided with fracturing windows. The inner sleeve slides to open or close the fracturing window. The inner side surface of the outer sleeve is provided with a fracturing ball releasing groove. The fracturing ball is pitched on the ball seat assembly. When the ball seat assembly moves to the fracturing ball releasing groove, the fracturing ball generates thrust under the action of external forces, to push a plurality of ball seat supports to move outward along a radial direction, and the fracturing ball passes through the ball seat assembly and falls into a next section of the ball-pitching sliding sleeve type fracturing device. Using the ball-pitching sliding sleeve type fracturing device can realize an objective of fracturing an infinite layer section by just pitching a ball, and construction cost is reduced and yield of a single well is increased. The device solves defects in the prior art of range limitation of a fracturing sliding sleeve and influence of sliding of the inner sleeve after a shear pin is cut off.
Description
Technical field
The present invention relates to hydrocarbon well completions apparatus field, particularly relate to a kind of ball seat assembly and pitching sleeve type pressure
Split device.
Background technology
For shale gas reservoir transformation, the construction technology of low-permeability reservoir reconstruction in prior art, generally adopt
Composite bridge plug or packer is coordinated to coordinate at the bottom of fracturing sliding bush or coiled tubing band with cable transmission perforation rifle
Envelope drive technology realizes, but these existing construction technologies all have certain limitation.
When the form of construction work using cable perforation to coordinate composite bridge plug, costly, and perforation can for perforation
Stratum can be damaged；Pumping bridging plug needs substantial amounts of water；Bore except costly, boring except the time is longer.
And, after operation one segment distance, needing to trip out cable and change bridging plug and perforating bullet, the cycle of construction is considerably long；
Work progress also needs to employ cable car.Additionally, the examination & approval of perforating bullet, setting tool and gunpowder, fortune
Defeated the most highly difficult, efficiency of construction can be affected.
When the form of construction work using packer to coordinate fracturing sliding bush, during operation, need termination of pumping pitching, release,
Operation also needs to after completing bore except ball seat or salvage ball seat；Due to the reasons in structure of fracturing sliding bush self, point
Section layering progression is restricted.Additionally, the mill quality of boring of ball seat will directly affect the follow-up difficulty repeating transformation
Easily degree.
Use coiled tubing band underseal drive technology time, perforation costly, may be to coiled tubing
Damage；Limited by coiled tubing length, and the expense of Operation Tubing Aggregate is the highest.Additionally,
This form of construction work also can face the risk of sand card.
Summary of the invention
The technical problem to be solved in the present invention is to solve drawbacks described above of the prior art, it is provided that Yi Zhongqiu
Holder assembly and pitching sliding sleeve fracturing device, can realize only throwing a ball and get final product the purpose of the unlimited interval of pressure break,
And construction cost can be reduced, increase well yield, the pole of the fracturing sliding bush used in solution prior art
The defect of difference restriction and shear pin affect, after being cut off, the defect that inner sleeve is slided.
For solving above-mentioned technical problem, the invention provides a kind of ball seat assembly, for pitching sleeve type pressure
Splitting device, including multiple ball seat supports being separated from each other, it is a hollow that the plurality of ball seat support encloses
Annular base body；Each described ball seat support includes interconnective limiting plate and supporting part, described limiting plate
Being fastened between inner sleeve and the overcoat of described pitching sliding sleeve fracturing device, described supporting part is through described interior
Set also stretches out from the internal face of described inner sleeve.
Present invention also offers a kind of pitching sliding sleeve fracturing device, including inner sleeve, overcoat, pressure break ball and
Foregoing ball seat assembly；Described inner sleeve is slidably set in the inside of described overcoat, described inner sleeve
The pressure break window supplying pressure break liquid stream to go out to implement pressure break, described inner sleeve edge is offered respectively with described outer putting
Slide axially to be turned on and off described pressure break window；Offer pressure break ball on the medial surface of described overcoat to release
Putting groove, described pressure break ball is thrown on described ball seat assembly；When described ball seat assembly moves to described
During pressure break ball release groove, described pressure break ball produces lower thrust under external force, promotes the plurality of
Ball seat support is moved radially outwards so that the internal diameter of described ball seat assembly becomes big, and described pressure break ball passes
Described ball seat assembly falls in next section of pitching sliding sleeve fracturing device.
In a specific embodiment of the present invention, pitching sliding sleeve fracturing device also include being arranged on described in
Detent mechanism between set and described overcoat, described detent mechanism includes being opened on described outer wall of inside race face
Gathering sill and the positioning sleeve that is set between described inner sleeve and described overcoat, the shape of described gathering sill with
The default mobile route of described inner sleeve matches, and the inner side of described positioning sleeve is provided with described in extending to and leads
Location division in groove；Described inner sleeve is slided relative to described overcoat under external force, described location division
Sidewall along described gathering sill moves, and moves along preset path controlling described inner sleeve.
In the present embodiment, pitching sliding sleeve fracturing device also includes the reset bullet being set in described overcoat
Spring, one end of described back-moving spring fixes, and its other end abuts against with the end of described inner sleeve；In described
The preset path that set is limited along described detent mechanism under external force moves down, and compresses described reset
Spring also makes described pressure break window open to implement pressure break；After stopping pressure break and discharging pressure, described multiple
Position spring reset, the preset path reversely promoting described inner sleeve to be limited along described detent mechanism moves.
In the present embodiment, described gathering sill has multiple along the axially extending of described inner sleeve and along described interior
The lower column position that the circumference of set sets gradually:
Initial position, is positioned at the bottom of described gathering sill, described pitching sliding sleeve fracturing device installation
Time, described position point is closed in described initial position, described pressure break window；
Pressure break position, is positioned at one end away from described initial position on described gathering sill, when described location division
When being positioned at described pressure break position, described pressure break window is opened to implement pressure break；
Remove pressure position, be positioned at the bottom of described gathering sill, when described position point in described remove pressure position time,
Described pressure break close is to suspend pressure break；
Pressure break ball off-position, is positioned at one end away from described initial position on described gathering sill, when described
Position point is when described pressure break ball off-position, and described ball seat assembly moves to the release of described pressure break ball recessed
At groove, the internal diameter of described ball seat assembly becomes big, and described pressure break ball falls to next through described ball seat assembly
In section pitching sliding sleeve fracturing device；
Automatically reset position, is positioned at the bottom of described gathering sill, when described position point is in described the most multiple
During position, position, described pressure break close, the fracturing process of pitching sliding sleeve fracturing device described in this paragraph is complete
Become.
Preferably, described gathering sill also include along the circumference of described inner sleeve be successively set on described in remove pressure position
And secondary fracturing position and secondary between described pressure break ball off-position remove pressure position；Described secondary fracturing
Position, is positioned at one end away from described initial position on described gathering sill, when described position point is in described
During secondary fracturing position, described pressure break window is opened to be again carried out pressure break；Described secondary removes pressure position,
It is positioned at the bottom of described gathering sill, when described position point removes pressure position in described secondary, described pressure break
Window is again switched off suspending pressure break.
In the present embodiment, described gathering sill also include along the circumference of described inner sleeve be successively set on described from
Move the adjustment position between reset position and described initial position and sliding sleeve open position；
Described adjustment position, for judging its location by the mobile route of described inner sleeve；Institute
State sliding sleeve open position, be positioned at the top of described pressure break ball off-position on described gathering sill, when described fixed
When position portion is positioned at described sliding sleeve open position, described pressure break window is opened and described inner sleeve is led to described overcoat
Cross the fixing connection of fixed mechanism.
In the present embodiment, pitching sliding sleeve fracturing device also include being positioned at described inner sleeve and described overcoat it
Between fixed mechanism；Described fixed mechanism includes retainer ring, retainer ring holding tank and retainer ring release groove；
Described retainer ring is fastened between described inner sleeve and described overcoat with compressive state；Described retainer ring holding tank
Be opened in described in put, for accommodating the described retainer ring after compression；Described retainer ring release groove is offered
On described outer set, when described retainer ring holding tank moves to when connecting with described retainer ring release groove, institute
State retainer ring elastic expansion to snapping in described retainer ring release groove, make described inner sleeve stop sliding and with institute
State the fixing connection of overcoat.
In the present embodiment, pitching sliding sleeve fracturing device also includes the shearing ring assembly of split blade type, described
Shearing ring assembly includes the shearing ring that cross section is L-shaped, and described shearing ring is fastened on described inner sleeve with described
Between overcoat, including being mutually perpendicular to and fixing the fixed part and cut part connected；Described inner sleeve with described outside
The space for the described fixed part that is fixedly clamped it is formed with between set；Put in described and offer for accommodating
The shear groove of described cut part.
In the present embodiment, described inner sleeve circumferentially offers multiple first pressure break window, described overcoat edge
Circumference offers multiple second pressure break window, described inner sleeve of sliding, and makes described first pressure break window with described
Second pressure break window overlaps to open described pressure break window；It is provided with anti-between described inner sleeve and described overcoat
Erosion grip assembly, described corrosion-proof cover assembly has the 3rd pressure break window and is fixed on the inner side of described overcoat, making
Described 3rd pressure break window overlaps with described second pressure break window.
Implement ball seat assembly provided by the present invention and pitching sliding sleeve fracturing device, there is following useful effect
Really:
(1) ball seat assembly is the split-type mechanism being made up of the ball seat support of multiple separation, in preset state
Under open to discharge pressure break ball 5, fall in next section of pitching sliding sleeve fracturing device, it is achieved only throw a ball
And can the purpose of the unlimited interval of pressure break.Furthermore, it is not necessary that the ball injector of complexity, ball-receiver, and can save
Substantial amounts of pumped liquid, reduces construction cost.
(2) this pitching sliding sleeve fracturing device is internal is big orifice, all ball seat assemblies equivalently-sized,
When the later stage needs refracturing, it is not necessary to bore except entering supporting refracturing pipe under any parts
String carries out pressure break is repeated several times, and greatly increases well yield, reduces construction cost.
(3) it is enclosed within the guide effect of detent mechanism and slides by preset path, it is achieved pitching sleeve type pressure
Split the unlatching of device, close, discharge pressure break ball and the locking action such as inner sliding sleeve, improve automaticity,
Substantially reduce construction period.
(4) pressure break window is provided with corrosion-proof cover assembly, prevents pressure break window from rushing at the fluid high-pressure of fracturing fluid
Erosion is lower there is damaged or corrosion, it is possible to prevent fracturing fluid from overflowing and causing pressure to decline.
(5) the conventional shear pin that the shearing ring in the present invention can solve used in prior art is cut
Have no progeny and affect the defect that inner sleeve is slided.
(6) spring protecting jacket can be used for preventing because impurity enters spring in well cementation and fracturing process
In and the operation of this pitching sliding sleeve fracturing device that causes is affected.
(7) without differential restriction, unlimited number of sliding sleeve can i.e. be used in well, it is achieved infinite stages pressure break,
Farthest to improve yield；And, fracturing process need not wireline operation car or coiled tubing
Car, it also avoid the injury to ground caused because of perforation, greatly reduces construction cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the pitching sliding sleeve fracturing device in the present invention one specific embodiment；
Fig. 2 is the close-up schematic view of A section in Fig. 1；
Fig. 3 is the structural representation of shearing ring in Fig. 2；
Fig. 4 is the sectional view of shearing ring in Fig. 2；
Fig. 5 is the close-up schematic view of B section in Fig. 1；
Fig. 6 is the structural representation of corrosion-proof cover assembly in Fig. 1；
Fig. 7 is the axonometric chart of pressure break overcoat in Fig. 1；
Fig. 8 is the sectional view of pressure break overcoat in Fig. 1；
Fig. 9 is the axonometric chart of hard alloy sleeve in Fig. 1；
Figure 10 is the top view of ball seat assembly in Fig. 1；
Figure 11 is the axonometric chart of ball seat assembly in Fig. 1；
Figure 12 is the close-up schematic view of C section in Fig. 1；
Figure 13 is to control internal axle sleeve and the axonometric chart of detent mechanism in Fig. 1；
Figure 14 is the axonometric chart of positioning sleeve in Figure 13；
Figure 15 is the close-up schematic view of D section in Fig. 1；
Figure 16 is the expansion schematic diagram of the gathering sill in Figure 13；
Figure 17 show when position point in initial position, remove pressure position and secondary remove pressure position time, pitching
The state diagram of sliding sleeve fracturing device；
Figure 18 shows when position point is in pressure break position and secondary fracturing position, pitching sliding sleeve fracturing
The state diagram of device；
Figure 19 shows when position point is in pressure break ball off-position, the shape of pitching sliding sleeve fracturing device
State figure；
Figure 20 shows when position point is in sliding sleeve open position, the state of pitching sliding sleeve fracturing device
Figure.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, the present invention is further elaborated.It should be appreciated that tool described herein
Body embodiment is only used for explaining the present invention, is not intended to limit the present invention.
Fig. 1 shows the structural representation of the pitching sliding sleeve fracturing device in the present invention one specific embodiment.
For the clearer details illustrating this pitching sliding sleeve fracturing device, it is divided into vertically A, B, C
Conduct further description, referring specifically to Fig. 2, Fig. 3, Fig. 7 and Figure 13 with D tetra-sections.
This fracturing device includes inner sleeve 1, overcoat 2, top connection 3, lower contact 4, pressure break ball 5, ball seat group
Offer respectively on part 6 and spring 9, inner sleeve 1 and overcoat 2 to go out to implement the pressure break of pressure break for pressure break liquid stream
Window, inner sleeve 1 slides axially to be turned on and off described pressure break window.
As it is shown in figure 1, inner sleeve 1 includes pressure break inner sleeve 11, controls internal axle sleeve 12 and spring protecting jacket 13,
Overcoat 2 includes that joint is installed overcoat 21, pressure break overcoat 22, controlled outer shaft 23 and spring overcoat 24.
Inner sleeve 1 and overcoat 2 are split as the multiple ingredients removably connected, are conducive to transporting and being carried to
Job site.
One end of joint installation overcoat 21 plugs and is fixed with top connection 3, its other end and pressure break overcoat 22
End grafting；One end of pressure break overcoat 22 is enclosed within joint and installs the outside of overcoat 21, its other end and control
The end grafting of outer shaft 23 processed；The one end controlling outer shaft 23 is enclosed within the outside of pressure break overcoat 22, its
The other end and the end grafting of spring overcoat 24；One end of spring overcoat 24 is enclosed within and controls outer shaft 23
Outside, its other end is inserted with lower contact 4.Outside top connection 3, lower contact 4, installation overcoat 21, pressure break
Overlap 22, controlling respectively can by modes such as common helicitic textures between outer shaft 23 and spring overcoat 24
The connection of dismounting.
Pressure break inner sleeve 11 is through described pressure break overcoat 22, and its one end extends joint and installs in overcoat 21,
Its other end extends in control outer shaft 23；The one end controlling internal axle sleeve 12 extends in control outer shaft 23
And mutually abut with pressure break inner sleeve 11, in its other end extends spring overcoat 24 and with spring protecting jacket 13
Mutually abut；One end of spring protecting jacket 13 abuts with controlling internal axle sleeve 12, and its other end is free end.
Wherein, pressure break inner sleeve 11 circumferentially offers multiple first pressure break window 111, pressure break overcoat 22 edge
Circumference offers multiple second pressure break window 221, and the fracturing fluid being passed through high pressure promotes inner sleeve 1 relative to overcoat 2
During slip, the first pressure break window 111 is made to overlap to open pressure break window with the second pressure break window 221.Can
To be understood by, the concrete shape of the first pressure break window 111 and the second pressure break window 221 is in this no limit,
It is preferably the kidney-shaped in the present embodiment.
Top connection 3 is for connecting the sleeve pipe fracturing fluid with offer high pressure at the construction field (site), and top connection 3 has
Top connection through hole 301.
Lower contact 4 is also used for being connected with sleeve pipe and having lower contact through hole 401, spring protecting jacket 13 from
Extended in lower contact through hole 401 by end.
When installing the pitching sliding sleeve fracturing device in the present invention, top connection 3 upward, lower contact 4 court
Under be placed in bore hole, therefore be called top near the position of top connection 3, near the position of lower contact 4 be
Bottom.
As in figure 2 it is shown, this pitching sliding sleeve fracturing device also includes the shearing ring assembly 14 of split blade type, use
In allowing inner sleeve 1 be maintained at initial position a, to avoid inner sleeve 1 under gravity before starting pressure break
Move to bottom.
In conjunction with Fig. 3, the split blade type structure of shearing ring assembly 14 is the installation for the ease of the later stage, including three
Section cross section is shearing ring 141 and the baffle ring 142 of L-shaped, and each shearing ring 141 and baffle ring 142 all block and set
Between inner sleeve 1 and overcoat 2, preferably it is fastened on connection end and the joint of top connection 3 and pressure break inner sleeve 11
Install between overcoat 21, but be not limited to this.
In conjunction with Fig. 4, each shearing ring 141 includes being mutually perpendicular to and fixing the fixed part 141a connected and cut
Cutting portion 142b, three sections of shearing rings 141 are spliced into a complete annular around inner sleeve 1.
It is understood that shearing ring assembly 14 is not limited only to the three sections of shearing rings including in the application
141, it is also possible to be by two, four or more shearing ring 141 surround, concrete numeral is at this not
Make concrete restriction, as long as can ensure that all shearing rings 141 are evenly distributed in the circumference of inner sleeve 1, and energy
Inner sleeve 1 is jointly made to be maintained at initial position a before pressure break starts.
Joint is installed overcoat 21 and is become big, with on wall within it at the position internal diameter being provided with shearing ring 141
Form the recess for accommodating fixed part 141a.Offer in pressure break inner sleeve 11 for accommodating cut part 141b
Annular shear groove 112.When external force is sufficiently large, when being i.e. passed through the fracturing fluid of high pressure, inner sleeve 1 to
The bottom of overcoat 2 is moved, and shearing ring 141 is cut off, and fixed part 141a separates with cut part 142b.
Shearing ring 141 is used for making inner sleeve 1 be maintained at initial position a, and shearing ring 141 to be cut off needs to reach
Certain force value, the moment of shearing can find out in the pressure oscillation above Pressure gauge.Therefore, ground
Can judge whether shearing ring 141 is cut off with this during construction, and as the fracturing device in the application be
The no reference opened.
Additionally, before putting into pressure break ball 5, cement plug (also referred to as cementing plug) can be put into and carries out
Well cementation, this cement plug likely can because of through ball seat suppressed pressure and the pressure break in the application
Device is opened by mistake, and therefore, shearing ring 141 can also allow fracturing device be in initial pass in well cementing process
Closed state.
As it is shown in figure 5, this pitching sliding sleeve fracturing device also includes being arranged between inner sleeve 1 and overcoat 2
Corrosion-proof cover assembly 7, for preventing the first pressure break window 111 and the second pressure break window 221 at fracturing fluid
Damaged or corrosion occurs under high pressure effect, is also used for preventing fracturing fluid along the seam between inner sleeve 1 and overcoat 2
Gap is overflowed and is caused pressure to decline.
In the present embodiment, this corrosion-proof cover assembly 7 is arranged between pressure break inner sleeve 21 and pressure break overcoat 22.
In conjunction with Fig. 4, this corrosion-proof cover assembly 7 specifically includes hard alloy sleeve 71 and two groups of black boies 72.
The material of hard alloy sleeve 71 itself has erosion resistant speciality, in fracturing process, can pump into big
The fracturing fluid of amount and fracturing sand, pressure break notch all can be caused certain erosion by these, in order to prevent it to be subject to
This hard alloy sleeve 71 it is provided with to erosion.The 3rd pressure break window 711 is offered in hard alloy sleeve 71
And be fixed on the internal face of pressure break overcoat 22 by helicitic texture, make the 3rd pressure break window 711 and second
Pressure break window 221 overlaps.
In conjunction with Fig. 7, Fig. 8 and Fig. 9, pressure break overcoat 22 offers and passes through for screw element or pin for suppressing metal
First installation through hole 222, in hard alloy sleeve 71, correspondence offers the second installation through hole 712.3rd
Pressure break window 711 is preferably the waist through hole matched with the second pressure break window 221.
The two ends being arranged on hard alloy sleeve 71 that two groups of black boies 72 are respectively symmetrically, play sealing
Effect, it is to avoid degradation phenomenon under the pressure caused because fracturing fluid leaks.Often group black box includes respectively
It is close that cross section is that circular O RunddichtringO 721, O RunddichtringO packing ring 722, cross section have the V-type of concave arc
Seal 723 and V-seal packing 724, sealing back ring 725 and Sealing shield ring 726.Often organize black box
72 all arrange to reach best sealing effectiveness one by one by the position in Fig. 4, do not repeat them here.
Wherein, O RunddichtringO 721 seals, and O RunddichtringO packing ring 722 is for suppressing
Journey is protected O RunddichtringO 721；O RunddichtringO 721 can deform because of pressurized, and O type seals
Circle packing ring 722 prevents it to be damaged in extrusion process by limiting its deformation.
V-seal packing 724 plays the effect of sealing further, and V-shaped seal ring 723 is used for protecting V-type
Sealed packing 724 and O RunddichtringO 721, prevents the process moved back and forth at fracturing process or inner sleeve 1
In, sealed packing 724 and O RunddichtringO 721 damages because being squeezed.Seal back ring 725 and portion
Divide and snap in the Sealing shield ring 726 in pressure break overcoat 22 inwall, be also for fixing V-seal packing 724
With O RunddichtringO 721.
Owing to pressure break inner sleeve 21 and V-seal packing 724 and O RunddichtringO 721 all have Relative friction,
The reciprocating motion of pressure break inner sleeve 21 can make V-seal packing 724 and O RunddichtringO 721 also move,
In order to avoid these sealing members are damaged in moving process, need to add V-shaped seal ring 723, seal
Back ring 725 and Sealing shield ring 726.
Fig. 5 combines Figure 10 and Figure 11, and ball seat assembly 6 includes multiple ball seat support 61 being separated from each other,
These ball seat supports 61 are a point flap, and are encircled into the annular base body of a hollow.Each ball seat support 61
All include interconnective limiting plate 611 and supporting part 612.
In the present embodiment, limiting plate 611 and supporting part 612 are formed in one structure.
Limiting plate 611 is fastened between inner sleeve 1 and overcoat 2, and supporting part 612 is through inner sleeve 1 and from interior
Stretch out on the internal face of set 1.In the present embodiment, limiting plate 611 be preferably fastened on pressure break inner sleeve 11 with
Control between outer shaft 23, and be resisted against on the internal face of pressure break overcoat 22；Supporting part 612 is through pressure
Split the ball seat support through holes 113 offered in inner sleeve 11 and stretch out from the internal face of pressure break inner sleeve 11, with
Carrying pressure break ball 5.
Preferably, supporting part 612 is provided with inclined plane 613 away from a lateral edges of described limiting plate 611,
The inclined plane 613 of multiple ball seat supports 61 being separated from each other encloses formation the most gradually to ball
The annular slope that the middle part of seat support 61 tilts, to prevent pressure break ball 5 from rocking.
It is disjunct between adjacent tees support 61 in point flap ball seat assembly 6, when putting into pressure break ball
When 5, pressure break ball 5 falls on ball seat assembly 6, thus the pipe string of ball sealer holder assembly more than 6, formed close
Envelope, to keep the pressure of the follow-up pressure liquid squeezed into.Although the gap between two adjacent tees supports 61 is very
Little, have a small amount of pressure liquid and pass out, but, relative to the large discharge pump car of Oil Field,
This amount of leakage is negligible, because the discharge capacity that liquid squeezed into by pump truck is the biggest.So, silent
Recognizing to be formed when pressure break ball 5 falls on ball seat assembly 6 and seal, fracturing fluid can not pass through, thus produce pressure
Power promotes the inner sleeve 1 being connected with ball seat assembly 6 overall.
In conjunction with Figure 12, the medial surface of overcoat 2 is further opened with pressure break ball release groove 231, in this enforcement
In example, pressure break ball release groove 231 be opened in control outer shaft 23 inside, pressure break ball 5 thrown in
On ball seat assembly 6；Suppress on the ground, be filled with fracturing fluid, further pressure break ball 5 is pressed on annular
On ball seat assembly 6, the through hole that ball seat assembly 6 is surrounded blocked by pressure break ball 5, plays and seals fracturing fluid
Effect.Persistently suppressing along with ground, the pressure of fracturing fluid is gradually increased, pressure break ball 5 and ball seat group
Part 6 is formed and seals piston structure, under the pressure effect of fracturing fluid, drives whole inner sleeve 1 to slide.
When ball seat assembly 6 moves to pressure break ball release groove 231, multiple ball seat support 61 is in pressure break
It is moved radially outwards under the action of gravity of ball 5, until limiting plate 611 is against pressure break ball release groove 231
Bottom so that the internal diameter of ball seat assembly 6 becomes big, and pressure break ball 5 falls to next through ball seat assembly 6
In section pitching sliding sleeve fracturing device.
Fig. 5 combines Figure 12, and the pitching sliding sleeve fracturing device in the present invention also includes being positioned at inner sleeve 1 with outer
Fixed mechanism 15 between set 2, this fixed mechanism 15 includes retainer ring 151, retainer ring holding tank 152
With retainer ring release groove 153.
Wherein, retainer ring 151 is preferably arranged to have the c-type semi-ring of otch, on the side of semi-loop
Offer otch so that it is can compressive deformation under external force.When mounted, it is fastened on pressure break with compressive state
Between inner sleeve 15 and overcoat 2；Retainer ring holding tank 152 is circumferentially opened in pressure break inner sleeve 15 outside wall surface
On, the retainer ring 151 after accommodating compression；Retainer ring release groove 153 is opened in control outer shaft 23
Internal face on.It is understood that retainer ring 151 uses two semi-rings relatively to form, also for
The facility of assembling, it is also possible to be divided into more multistage arcuate structure, be not especially limited at this.
During inner sleeve 1 moves relative to overcoat 2, when retainer ring holding tank 152 moves to solid
Determine ring release groove 153 when connecting, retainer ring 151 elastic expansion to snapping in retainer ring release groove 153,
Inner sleeve 1 is made to stop sliding and fixing with the control outer shaft 23 of overcoat 2 being connected.
Figure 12 combines Figure 13 and Figure 14, and the pitching sliding sleeve fracturing device in the present invention also includes being arranged on
Detent mechanism 8 between inner sleeve 1 and overcoat 2, is preferably provided at spring overcoat 24 and control in the present embodiment
In the space surrounded between internal axle sleeve 12 processed.
Detent mechanism 8 includes being opened in the gathering sill 801 controlled in internal axle sleeve 12 outside wall surface and being set in control
Positioning sleeve 802 between internal axle sleeve 12 processed and spring overcoat 24, the shape of gathering sill 801 and inner sleeve 1
Default mobile route matches, and the inner side of positioning sleeve 802 is provided with and extends to determining in gathering sill 801
Position portion 803.Control internal axle sleeve 12 to slide relative to overcoat 2 under external force, and then promote inner sleeve 1
Whole slide, location division 803 is moved along the sidewall of gathering sill 801, to guarantee that inner sleeve 1 is along preset path
Mobile.
As shown in figure 14, the preferably circular projection in location division 803, it is also possible to be the structures such as straight pin, with
Realize smooth guiding；Offer in the outside wall surface of positioning sleeve 802 and be connected for spring overcoat 24 fixing
Recess 804.
Figure 12 combines Figure 15, and the pitching sliding sleeve fracturing device in the present invention also includes being set in spring overcoat
Back-moving spring 9 in 24, one end of this back-moving spring 9 fixes, the end of the other end and spring protecting jacket 13
Portion abuts against.
Inner sleeve 1 is under the high pressure effect of fracturing fluid, and promotion is formed by pressure break ball 5 and ball seat assembly 6
Sealing piston moves, and then promotes preset path that whole inner sleeve 1 limited along detent mechanism 8 to moving down
Dynamic, compression reseting spring 9 also makes pressure break window open, and fracturing fluid implements pressure break by pressure break window.When
After stopping pressure break and discharging the pressure of fracturing fluid, back-moving spring 9 resets, and reversely promotes inner sleeve 1 along location
The preset path that mechanism 8 is limited moves.
Preferably, the spring protecting jacket 13 arranged in inner sleeve 1 can protect back-moving spring 9, to avoid pressure break
The impurity such as sand enter in controlling internal axle sleeve 12 and between back-moving spring 9, thus avoid hindering back-moving spring 9
Reset and compression procedure.
Show in conjunction with Figure 13, Figure 16 and be opened in gathering sill 801 edge controlled in internal axle sleeve 12 outside wall surface
The shape of circumferentially deploying, gathering sill 801 has multiple along the axially extending of inner sleeve 1 and along controlling internal axle sleeve
The lower column position that the circumference of 12 sets gradually:
Initial position a, is positioned at the bottom of gathering sill 801.During pitching sliding sleeve fracturing device installation,
Location division 803 is positioned at initial position a, the first pressure break window 111 and the second pressure break window 221 and the 3rd pressure
Split window 711 to stagger, make pressure break window be closed, referring specifically to Figure 17.
Pressure break position b, is positioned at one end away from initial position a on gathering sill 801.When 803, location division
When the b of pressure break position, back-moving spring 9 is compressed, first pressure break window the 111, second pressure break window 221
And the 3rd pressure break window 711 overlap, make pressure break window open to implement pressure break, referring specifically to Figure 18.
Remove pressure position c, be positioned at the bottom of gathering sill 801.When location division 803 is positioned at and removes pressure position c,
Back-moving spring 9 resets, and pressure break close is to suspend pressure break, referring specifically to Figure 17.
Secondary fracturing position d, is positioned at one end away from initial position a on gathering sill 801, works as location division
803 when being positioned at secondary fracturing position d, and back-moving spring 9 is compressed, and pressure break window is opened to be again carried out pressure
Split, referring specifically to Figure 18.
Secondary removes pressure position e, is positioned at the bottom of gathering sill 801, removes pressure position when location division 803 is positioned at secondary
When putting e, back-moving spring 9 resets, and pressure break window is again switched off suspending pressure break, referring specifically to Figure 17.
Pressure break ball off-position f, is positioned at one end away from initial position a on gathering sill 801.Work as location division
803 when being positioned at pressure break ball off-position f, and back-moving spring 9 is further compressed, and ball seat assembly 6 moves
Moving to pressure break ball release groove 231, the internal diameter of ball seat assembly 6 becomes big, and pressure break ball 5 is through ball seat group
Part 6 falls in next section of pitching sliding sleeve fracturing device, referring specifically to Figure 19.
Automatically reset position g, is positioned at the bottom of gathering sill 801, when location division 803 is positioned at the position that automatically resets
When putting g, back-moving spring 9 resets, pressure break close.Now, pitching sliding sleeve fracturing device is similar to
State in Figure 17, simply pressure break ball 5 has been released.
There is certain risk owing to being controlled the motion of whole inner sleeve 1 by pressure, therefore be additionally arranged secondary pressure
Splitting position d and secondary removes pressure position e, the operation of refracturing, to avoid not completing pressure break, location division
803 are just moved into pressure break ball off-position f, thus the phenomenon such as avoid pressure break insufficient.Secondary pressure
Split position d and secondary to remove pressure position e be to provide the sufficient time for fracturing process, it is ensured that pressure break quality.
When location division 803 from initial position move to automatically reset position g time, this section of pitching sleeve type pressure
The fracturing process splitting device completes.
Additionally, for the pitching sliding sleeve fracturing device in all sections of disposable opening, need to coordinate hydraulic pressure
Switching tools (not shown) replaces fracturing fluid, it is provided that the power that inner sleeve 1 is slided.
Also include on gathering sill 801 being successively set on along the circumference of inner sleeve 1 and automatically reset position g with initial
Adjustment position between a of position and sliding sleeve open position h.
Adjust position, for judging its location by the mobile route of inner sleeve 1, specifically include
The first adjustment position j1 shown in figure, the second adjustment position j2, the 3rd adjustment position j3 and the 4th adjust
Whole position j4, but when moving in adjusting position, pressure break ball 5 has discharged.
First adjusts position j1, is positioned at one end away from initial position a on gathering sill 801.Work as location division
803 when being positioned at the first adjustment position j1, and back-moving spring 9 is compressed, this device with shown in Figure 18
State is close.
Second adjusts position j2, is positioned at the bottom of gathering sill 801.When location division 803 is positioned at the second adjustment
During the j2 of position, back-moving spring 9 resets, and this device is close with the state shown in Figure 17.
When location division 803 is positioned at the 3rd adjustment position j3, the state of this device and location division 803 are positioned at the
During one adjustment position j, the state of this device is similar, when location division 803 is positioned at the 4th adjustment position j4, and should
When the state of device is positioned at the second adjustment position j2 to location division 803, the state of this device is similar, at this not
Repeat again.
Above-mentioned adjustment position be provided with the most ground workmen, according to inner sleeve 1 according to this adjust
Whole position carry out successively on carry, decline, on carry and the rule that declines is to judge switching tools and this device institute
The position at place and state.
Sliding sleeve open position h, is positioned at the top of pressure break ball off-position f on gathering sill 801, works as location division
803 when being positioned at sliding sleeve open position h, and pressure break window is opened and inner sleeve 1 passes through fixed mechanism with overcoat 2
15 fixing connections, make this pitching sliding sleeve fracturing device be maintained at state as shown in figure 20.Now, multiple
The degree that position spring 9 is compressed is maximum, and pressure break window is opened.
In conjunction with Figure 16 to Figure 20 the operation principle of the pitching sliding sleeve fracturing device in the present invention carried out as
Under illustrate.
This pitching sliding sleeve fracturing device can coordinate packer (not shown) to carry out segmentation installation:
First, packer (figure is entered under in bore hole (not shown) or sleeve pipe (not shown)
Not shown in), interval to insulate the annular between bore hole or sleeve pipe and flow string.Then, circulate pitching,
Closing ball seat, oil pipe pressurizes with set packer, i.e. squeezes into highly pressurised liquid by pump truck and ball is pumped to ball
Seat.Here ball is not previously mentioned pressure break ball 5, but the ball that a diameter is less than pressure break ball 5,
Referred to herein as ball seat be not previously mentioned split-type ball seat assembly 6, and be in whole pipe string end
Existing ball seat；When this ball arrives this existing ball seat, whole oil pipe will be closed, thus
Packer can be suppressed, it may be said that this ball is for set packer.Finally, pitching sliding sleeve is installed
Formula fracturing device, fracturing sliding bush is now in the state of pressure break close illustrated in fig. 17, location division
803 are positioned at initial position a.
This pitching sliding sleeve fracturing device can also connect sleeve pipe (not shown) and go into the well and cement the well:
First, pitching sliding sleeve fracturing device connection sleeve pipe is gone into the well；Then, circulation bruising is with well cementation.
Now, fracturing sliding bush is now in the state of pressure break close illustrated in fig. 17,803, location division
In initial position a.
After pitching sliding sleeve fracturing device in installing the present invention, proceed by fracturing process:
1) putting into pressure break ball 5 from well head, pressure break ball 5 can drop at first pitching sliding sleeve fracturing device
In ball seat assembly 6 on, together with ball seat assembly 6 formed be similar to seal piston structure.
2) top connection 3 connects external pipe persistently to squeeze into fracturing fluid, high pressure effect produced by fracturing fluid
On pressure break ball 5 with ball seat assembly 6.Formed after being adjacent to ball seat assembly 6 due to pressure break ball 5 and seal, pressure
Split the overall slide downward of pushed at high pressure inner sleeve 1 of liquid, compression reseting spring 9.
And when pitching sliding sleeve fracturing device installs, shearing ring 141 is for preventing inner sleeve 1 from occurring
Sliding；After thrust produced by fracturing fluid is higher than the shear strength of shearing ring 141, shearing ring 141
Cut off, i.e. fixed part 141a separates with cut part 141b, and now, inner sleeve 1 entirety just starts leading
Slide downward under the guide effect of groove 801.
When location division 803 is moved to pressure break position b, first pressure break window the 111, second pressure break window
221 and the 3rd pressure break window 711 overlap, make pitching sliding sleeve fracturing device open to implement for the first time pressure
Split, referring specifically to Figure 18.
3) after pressure break terminates for the first time, ground bleeds off pressure, and has i.e. withdrawn and has been applied to pressure break ball 5 and ball seat assembly 6
On thrust, now, inner sleeve 1 moves up under the elastic-restoring force effect of back-moving spring 9, location
Portion 803 can move to removing pressure position c in automatic reverse.Now, the first pressure break window 111 and the second pressure break window
Mouth 221 and the 3rd pressure break window 711 stagger, and make pressure break window be closed.
4) low pressure is beaten on ground, carries out refracturing.Now, pressure break ball 5 and ball seat assembly 6 are at fracturing fluid
Promotion under, drive inner sleeve 1 again move down, compression reseting spring 9；When location division 803 is from moving
In time moving to secondary fracturing position d, pressure break window is opened to be again carried out pressure break.
5) ground bleeds off pressure again, and inner sleeve 1 moves up under the elastic-restoring force effect of back-moving spring 9,
Location division 803 automatic reverse is moved to secondary to remove and is pressed position e.
6) ground repressurization, pressure break ball 5 and ball seat assembly 6, under the promotion of fracturing fluid, drive inner sleeve
1 moves down, compression reseting spring 9, until ball seat assembly 6 move to pressure break ball discharge groove 231 institute
The position at place.Now, pressure break ball 5 produces downforce under fracturing fluid, gravity or other External Force Actings,
Ball seat assembly 6 and then move near the direction of overcoat 2 under the effect of pressure break ball 5, ball seat assembly 6
Being flared out so that internal diameter becomes big, pressure break ball 5 is released through ball seat assembly 6；Meanwhile, location division 803
Automatic reverse is moved to pressure break ball off-position f.
7) being released due to pressure break ball 5, sealed destroyed, the power promoting inner sleeve 1 to slide disappears,
Inner sleeve 1 will not be further continued for gliding.Ground bleeds off pressure, and inner sleeve 1 is in the elastic-restoring force effect of back-moving spring 9
Under move up, to close the pressure break window of this pitching sliding sleeve fracturing device, location division 803 is from moving
To mobile to the position g that automatically resets.
According to above-mentioned operation principle, pressure break ball 5 drops down onto second segment, the throwing of the 3rd section to final stage successively
In ball sliding sleeve fracturing device.Owing to the pitching sliding sleeve fracturing device of top is because releasing pressure ball 5
And be all turned off, so for each section of pitching sliding sleeve fracturing device, the most repeatable aforesaid operations 1) extremely
7), until completing whole fracturing process.
After above-mentioned pressing crack construction terminates, entering hydraulic selector instrument under needs, this switching tools drives with outside
Dynamic device is connected, and for disposable opening all pitchings sliding sleeve fracturing device, specifically comprises the following steps that
1) by switching tools down to shaft bottom, when close to last pitching sliding sleeve fracturing device, start
Suppress；Now, the on & off switch block of switching tools can flick expansion, and switching tools is automatically locked at inner sleeve 1
On, so by carry or transfer switching tools, realize the slip of inner sleeve 1.
2) location division 803 is positioned at the position g that automatically resets after fracturing process terminates,
First, by pressure switches instrument, make inner sleeve 1 be moved downward to location division 803 and be positioned at the first tune
Whole position j1；
Then, by carry switching tools, make inner sleeve 1 be moved upward to location division 803 and be positioned at the second tune
Whole position j2；
And then, by pressure switches instrument, make inner sleeve 1 be moved downward to location division 803 and be positioned at the 3rd tune
Whole position j3；
Finally, by carry switching tools, make inner sleeve 1 be moved upward to location division 803 and be positioned at the 4th tune
Whole position j4, now, whole adjustment process terminates.
3) by pressure switches instrument, due to the motive force of inner sleeve 1 entirely from switching tools, because of
This can pressurize and make location division 803 move to sliding sleeve open position h being positioned at gathering sill 801 top.This
Time, retainer ring 151 flicks and snaps in retainer ring release groove 153, by this pitching sliding sleeve fracturing device
It is locked in the state forever opened.
4) according to the method described above, open successively second from the bottom, third from the bottom until all of pitching sleeve type
Fracturing device.
5) after all of pitching sliding sleeve fracturing device is all opened, take out switching tools, whole constructed
Journey completes.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in
The detailed description of the invention stated, above-mentioned detailed description of the invention is only schematic rather than restrictive,
Those of ordinary skill in the art is under the enlightenment of the present invention, without departing from present inventive concept and claim
Under the ambit protected, it may also be made that a lot of form, within these belong to the protection of the present invention.
Claims (10)
1. a ball seat assembly, for pitching sliding sleeve fracturing device, it is characterised in that include multiple phase
The ball seat support (61) separated mutually, it is the annular base body of a hollow that the plurality of ball seat support (61) encloses；
Each described ball seat support (61) includes interconnective limiting plate (611) and supporting part (612),
Described limiting plate (611) is fastened on inner sleeve (1) and the overcoat (2) of described pitching sliding sleeve fracturing device
Between, described supporting part (612) are through described inner sleeve (1) and from the internal face of described inner sleeve (1)
Stretch out.
2. a pitching sliding sleeve fracturing device, it is characterised in that include inner sleeve (1), overcoat (2),
Ball seat assembly (6) described in pressure break ball (5) and claim 1；
Described inner sleeve (1) is slidably set in the inside of described overcoat (2), described inner sleeve (1) and
The pressure break window going out to implement pressure break for pressure break liquid stream, described inner sleeve is offered respectively on described overcoat (2)
(1) slide axially to be turned on and off described pressure break window；
Pressure break ball release groove (231), described pressure break ball (5) is offered on the medial surface of described overcoat (2)
Thrown on described ball seat assembly (6)；
When described ball seat assembly (6) mobile extremely described pressure break ball release groove (231) place, described pressure
Blastomere (5) produces lower thrust under external force, promote the plurality of ball seat support (61) radially to
Outer movement so that the internal diameter of described ball seat assembly (6) becomes big, and described pressure break ball (5) passes described ball
Holder assembly (6) falls in next section of pitching sliding sleeve fracturing device.
Pitching sliding sleeve fracturing device the most according to claim 2, it is characterised in that also include setting
Put the detent mechanism (8) between described inner sleeve (1) and described overcoat (2), described detent mechanism (8)
Including the gathering sill (801) being opened in described inner sleeve (1) outside wall surface be set in described inner sleeve (1)
And the positioning sleeve (802) between described overcoat (2), the shape of described gathering sill (801) is interior with described
The default mobile route of set (1) matches, and the inner side of described positioning sleeve (802) is provided with and extends to
Location division (803) in described gathering sill (801)；
Described inner sleeve (1) is slided relative to described overcoat (2) under external force, described location division (803)
Sidewall along described gathering sill (801) moves, and moves along preset path controlling described inner sleeve (1).
Pitching sliding sleeve fracturing device the most according to claim 3, it is characterised in that also include set
The back-moving spring (9) being located in described overcoat (2), one end of described back-moving spring (9) fixes, its
The other end abuts against with the end of described inner sleeve (1)；
The preset path that described inner sleeve (1) is limited along described detent mechanism (8) under external force to
Lower movement, compresses described back-moving spring (9) and makes described pressure break window open to implement pressure break；Work as stopping
Pressure break after discharging pressure, described back-moving spring (9) resets, and reversely promotes described inner sleeve (1) along institute
State the preset path that detent mechanism (8) limited to move.
Pitching sliding sleeve fracturing device the most according to claim 3, it is characterised in that described guiding
Groove (801) has multiple circumference along the axially extending of described inner sleeve (1) and along described inner sleeve (1) and depends on
The lower column position of secondary setting:
Initial position (a), is positioned at the bottom of described gathering sill (801), and described pitching sliding sleeve fracturing fills
When putting installation, described location division (803) are positioned at described initial position (a), at described pressure break window
In closed mode；
Pressure break position (b), is positioned on described gathering sill (801) away from the one of described initial position (a)
End, when described location division (803) are positioned at described pressure break position (b), described pressure break window open with
Implement pressure break；
Remove pressure position (c), be positioned at the bottom of described gathering sill (801), when described location division (803)
When removing pressure position (c) described in being positioned at, described pressure break close is to suspend pressure break；
Pressure break ball off-position (f), is positioned on described gathering sill (801) away from described initial position (a)
One end, when described location division (803) are positioned at described pressure break ball off-position (f), described ball seat
Assembly (6) is mobile to described pressure break ball release groove (231) place, the internal diameter of described ball seat assembly (6)
Becoming big, described pressure break ball (5) falls to next section of pitching sleeve type pressure through described ball seat assembly (6)
Split in device；
Automatically reset position (g), is positioned at the bottom of described gathering sill (801), when described location division (803)
Automatically reset described in being positioned at position (g) time, described pressure break close, pitching sleeve type pressure described in this paragraph
The fracturing process splitting device completes.
Pitching sliding sleeve fracturing device the most according to claim 5, it is characterised in that described guiding
Groove (801) also include along the circumference of described inner sleeve (1) be successively set on described in remove pressure position (c) and institute
State secondary fracturing position (d) between pressure break ball off-position (f) and secondary removes pressure position (e)；
Described secondary fracturing position (d), is positioned on described gathering sill (801) away from described initial position (a)
One end, when described location division (803) are positioned at described secondary fracturing position (d), described pressure break window
Mouth is opened to be again carried out pressure break；
Described secondary removes pressure position (e), is positioned at the bottom of described gathering sill (801), when described location division
(803) be positioned at described secondary remove pressure position (e) time, described pressure break window is again switched off suspending pressure break.
Pitching sliding sleeve fracturing device the most according to claim 5, it is characterised in that described guiding
Groove (801) also include along the circumference of described inner sleeve (1) be successively set on described in automatically reset position (g)
And the adjustment position between described initial position (a) and sliding sleeve open position (h)；
Described adjustment position, for judging its location by the mobile route of described inner sleeve；
Described sliding sleeve open position (h), is positioned at the upper described pressure break ball off-position of described gathering sill (801)
The top of (f), when described location division (803) are positioned at described sliding sleeve open position (h), described pressure
Split window unlatching and described inner sleeve (1) to be connected by fixed mechanism (15) is fixing with described overcoat (2).
Pitching sliding sleeve fracturing device the most according to claim 2, it is characterised in that also include position
Fixed mechanism (15) between described inner sleeve (1) and described overcoat (2)；
Described fixed mechanism (15) includes retainer ring (151), retainer ring holding tank (152) and retainer ring
Release groove (153)；
Described retainer ring (151) with compressive state be fastened on described inner sleeve (1) and described overcoat (2) it
Between；
Described retainer ring holding tank (152) is opened in described inner sleeve (1), after accommodating compression
Described retainer ring (151)；
Described retainer ring release groove (153) is opened on described overcoat (2), when described retainer ring accommodates
Groove (152) moves when extremely connecting with described retainer ring release groove (153), described retainer ring (151) bullet
Property be expanded to snap in described retainer ring release groove (153), make described inner sleeve (1) stop sliding and with
Described overcoat (2) is fixing to be connected.
Pitching sliding sleeve fracturing device the most according to claim 2, it is characterised in that also include point
The shearing ring assembly (14) of chip, described shearing ring assembly (14) includes the shearing ring that cross section is L-shaped
(141), described shearing ring (141) is fastened between described inner sleeve (1) and described overcoat (2), bag
Include and be mutually perpendicular to and fix the fixed part (141a) and cut part (141b) connected；
It is formed for the described fixed part (141a) that is fixedly clamped between described inner sleeve (1) and described overcoat (2)
Space；The shear groove (112) for accommodating described cut part (141b) is offered in described inner sleeve (1).
Pitching sliding sleeve fracturing device the most according to claim 2, it is characterised in that in described
Set (1) circumferentially offers multiple first pressure break window (111), and described overcoat (2) is circumferentially offered
There are multiple second pressure break window (221), described inner sleeve of sliding (1), make described first pressure break window (111)
Overlap to open described pressure break window with described second pressure break window (221)；
Corrosion-proof cover assembly (7), described corrosion protection it is provided with between described inner sleeve (1) and described overcoat (2)
Grip assembly (7) has the 3rd pressure break window (711) and is fixed on the inner side of described overcoat, makes described
Three pressure break windows (711) overlap with described second pressure break window (221).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020565.0A CN105840163B (en) | 2015-01-15 | 2015-01-15 | Ball seat component and pitching sliding sleeve fracturing device |
| PCT/CN2015/080588 WO2016112612A1 (en) | 2015-01-15 | 2015-06-02 | Ball seat assembly and ball throwing sliding sleeve type fracturing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020565.0A CN105840163B (en) | 2015-01-15 | 2015-01-15 | Ball seat component and pitching sliding sleeve fracturing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840163A true CN105840163A (en) | 2016-08-10 |
| CN105840163B CN105840163B (en) | 2019-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510020565.0A Active CN105840163B (en) | 2015-01-15 | 2015-01-15 | Ball seat component and pitching sliding sleeve fracturing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105840163B (en) |
| WO (1) | WO2016112612A1 (en) |
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| CN106194110A (en) * | 2016-09-23 | 2016-12-07 | 中国石油集团西部钻探工程有限公司 | Spin Control stepless pitching fracturing sliding bush |
| CN108398246A (en) * | 2017-02-07 | 2018-08-14 | 中国石油化工股份有限公司 | Sliding sleeve specification detection device |
| CN107143307A (en) * | 2017-07-20 | 2017-09-08 | 中国石油化工股份有限公司 | A kind of sliding sleeve fracturing device |
| CN111164272A (en) * | 2017-08-02 | 2020-05-15 | 地球动力学公司 | Opening casing using hydraulic power setting tool |
| US11333003B2 (en) | 2017-08-02 | 2022-05-17 | Geodynamics, Inc. | Opening a casing with a hydraulic-powered setting tool |
| CN108590615A (en) * | 2018-03-03 | 2018-09-28 | 东北石油大学 | A kind of multistage fracturing pitching control tool |
| CN108590615B (en) * | 2018-03-03 | 2023-06-27 | 东北石油大学 | Multistage fracturing ball-throwing control tool |
| CN109339751A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | It is a kind of easily to bore formula composite throttling device and application method |
| CN112049605A (en) * | 2020-09-26 | 2020-12-08 | 东北石油大学 | Underground full-bore infinite-stage ball-throwing counting fracturing sliding sleeve |
| CN112049605B (en) * | 2020-09-26 | 2022-11-01 | 东北石油大学 | Underground full-bore infinite-stage ball-throwing counting fracturing sliding sleeve |
| CN114016952A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Integrated ball seat sliding sleeve structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016112612A1 (en) | 2016-07-21 |
| CN105840163B (en) | 2019-03-12 |
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