CN107288602B - A kind of automatically controlled toe-end fracturing sliding bush - Google Patents
A kind of automatically controlled toe-end fracturing sliding bush Download PDFInfo
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- CN107288602B CN107288602B CN201710400533.2A CN201710400533A CN107288602B CN 107288602 B CN107288602 B CN 107288602B CN 201710400533 A CN201710400533 A CN 201710400533A CN 107288602 B CN107288602 B CN 107288602B
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- inner cylinder
- fracturing
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- 238000007789 sealing Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 21
- 238000005488 sandblasting Methods 0.000 claims description 25
- 238000012545 processing Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 235000014121 butter Nutrition 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 description 17
- 210000002445 nipple Anatomy 0.000 description 16
- 239000007789 gas Substances 0.000 description 12
- 238000005422 blasting Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Body Structure For Vehicles (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of automatically controlled toe-end fracturing sliding bushs, comprising: sliding sleeve inner cylinder, sliding sleeve outer cylinder, sliding sleeve.The fracturing sliding bush further includes driving cylinder, and both ends are connect with crossover sub and top connection respectively, and inner cavity is connected with the inner cavity of sliding sleeve inner cylinder, and control assembly, motor driver, the motor being sequentially electrically connected are provided in side wall.Pressure transmission channel, is axially arranged in the side wall of crossover sub.Radial passage is arranged in the side wall of crossover sub, and is connected with the inner cavity in pressure transmission channel and driving cylinder.Sealing bar is connected to motor, and is used to open or blocks pressure transmission channel.Displacement sensor is arranged in radial passage, is electrically connected for detecting the position of sealing bar, and with control assembly.The automatically controlled toe-end fracturing sliding bush precisely, reliably control by opening of the electric signal to sliding sleeve, it avoids and uncertainty caused by the opening of sliding sleeve is controlled by pressure in the prior art, the success rate for improving sliding sleeve smooth opening realizes the safe pressure testing of pit shaft.
Description
Technical field
The present invention relates to natural gas extraction field, in particular to a kind of automatically controlled toe-end fracturing sliding bush.
Background technique
Shale gas is a kind of Unconventional gas hidden oneself in rammell or shale layer with free or adsorbed state, shale
Gas can be used as civilian and chemical fuel, it can also be used to chemical industry and power generation etc..Currently, shale gas mainly uses coiled tubing to make
Industry is exploited using horizontal well stage fracturing technology.It is more than 3500m, horizontal section length for depth of reservoirs is more than 1500m's
When using horizontal well stage fracturing technology, due to the limitation of continuous oil pipe operation length, it is sliding need to use toe-end pressure break instead for shale gas well
It covers and establishes first segment pressure break channel in net horizontal section, then just can be carried out subsequent fracturing work.Establish first segment pressure break channel
When, it needs in the preset fracturing device of net horizontal section toe-end, is opened fracturing device by higher pressure, so that net horizontal section two
The rock of side generates crack, so that the oil between rock, gas etc. be made to enter in pit shaft, realizes the acquisition of oil, gas.Wherein, toe-end
Fracturing sliding bush can open be directly related to first segment pressure break channel success establish and subsequent pressing crack construction process can
It goes on smoothly, therefore it provides a kind of can guarantee that the toe-end fracturing sliding bush successfully opened is very necessary.
The prior art provides a kind of blasting type fracturing control valve, comprising: sliding sleeve inner cylinder and sliding sleeve outer cylinder, both ends respectively with
Top connection is connected with crossover sub, and corresponding position is provided with sandblasting hole on side wall, is additionally provided on the inner wall of sliding sleeve inner cylinder
Explosive valve.Sliding sleeve is fixed between sliding sleeve inner cylinder and the annular space of sliding sleeve outer cylinder by shear pin, for making sliding sleeve inner cylinder and cunning
Sandblasting hole on set outer cylinder is connected to or separates.The lower part of crossover sub, which is sequentially connected, to be carried body, leads quick-fried device and lower contact.It carries
It is provided with demolition bomb in body, leads quick-fried device inner wall equipped with inlet opening.The ignition pressure for leading quick-fried device is greater than opening for explosive valve
Open pressure.
In use, lower part is equipped in the staged fracturing tool string tripping in pit shaft of blasting type fracturing control valve, tripping in
Separate the sandblasting hole on sliding sleeve inner cylinder and sliding sleeve outer cylinder by sliding sleeve in journey, even if blasting type fracturing control valve, which is in, closes shape
State.In pit shaft after the completion of well cementation, pressure testing, enter highly pressurised liquid in the annular space of sliding sleeve inner cylinder and sliding sleeve outer cylinder by explosive valve,
Apply downward pressure to sliding sleeve, until shear pin is cut, sliding sleeve is moved downward, at this time on sliding sleeve inner cylinder and sliding sleeve outer cylinder
Sandblasting hole connection, that is, realize blasting type fracturing control valve opening.If cement slurry when being cemented the well due to explosive valve is blocked
And can not be normally-open, cause sliding sleeve to open failure, the pumping pressure of highly pressurised liquid can be improved, is led by highly pressurised liquid starting
Quick-fried device, and then demolition bomb is ignited, a hole is blasted on sliding sleeve inner cylinder and sliding sleeve outer cylinder, makes inner cavity and the pit shaft of sliding sleeve inner cylinder
It is connected, to realize the unlatching of sliding sleeve.The blasting type fracturing control valve, on the basis of open sliding sleeve by conventional methods,
A kind of spare opening ways (i.e. ignition demolition bomb) are increased, to improve the probability that sliding sleeve is successfully opened.
Inventor has found that the prior art at least has following technical problem:
The blasting type fracturing control valve that the prior art provides, being damaged to a certain extent property of demolition bomb therein were easy to week
The casing enclosed damages, and influences the normal exploitation of shale gas.Moreover, demolition bomb has certain risk, sliding sleeve is caused to be opened
It is higher to open operating risk.In addition, since the pressure that quick-fried device is led in starting is greater than pressure test pressure (i.e. the pressure of shaft safety operation),
Whether shale gas well is in safe operational pressure when can not determine demolition bomb explosion, and there are some potential safety problemss.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that sliding sleeve safety can be guaranteed, successfully open by providing one kind
The automatically controlled toe-end fracturing sliding bush of wellbore pressure test is opened, realizes, specific technical solution is as follows:
The embodiment of the invention provides a kind of automatically controlled toe-end fracturing sliding bushs, comprising: sliding sleeve inner cylinder, both ends connect with conversion respectively
Head is connected with lower contact, and the first sandblasting hole is provided on barrel.
Sliding sleeve outer cylinder is sleeved on the outside of the sliding sleeve inner cylinder, and both ends connect with the crossover sub and the lower contact respectively
It connects, second sandblasting hole opposite with first sandblasting hole is provided on barrel.
Sliding sleeve is fixed in the annular space between the sliding sleeve inner cylinder and the sliding sleeve outer cylinder by shear pin.
The fracturing sliding bush further include:
Cylinder is driven, both ends are connect with the crossover sub and top connection respectively, the inner cavity of inner cavity and the sliding sleeve inner cylinder
It is connected, control assembly, motor driver, the motor being sequentially electrically connected is provided in side wall.
Pressure transmission channel is axially arranged in the side wall of the crossover sub, and with the sliding sleeve inner cylinder and the sliding sleeve
Annular space connection between outer cylinder.
Radial passage is arranged radially in the side wall of the crossover sub, and with the pressure transmission channel and the driving
The inner cavity of cylinder is connected to.
Sealing bar is protruded into the pressure transmission channel or is retracted by the motor driven.
Displacement sensor, setting is electrically connected in the radial passage, and with the control assembly, described close for detecting
Seal the position of bar.
Specifically, preferably, the sliding sleeve inner cylinder and the sliding sleeve are tightly connected by the first sealing ring, the sliding sleeve
It is tightly connected with the sliding sleeve outer cylinder by the second sealing ring.
Specifically, preferably, the outer wall of the crossover sub and the sliding sleeve inner cylinder is tightly connected, outside the sliding sleeve
The inner thread of cylinder is tightly connected, and is tightly connected with the driving cylinder screw.
Specifically, preferably, the outer wall thread of the lower contact and the sliding sleeve inner cylinder is tightly connected, with the sliding sleeve
The inner thread of outer cylinder is tightly connected.
Specifically, preferably, being coated with butter solid in the radial passage, for preventing the radial passage to be solidified
Cement slurry blocking afterwards.
Specifically, preferably, the driving cylinder includes:
Inner cylinder is driven, both ends are separately connected the top connection and the crossover sub.
Outer cylinder is driven, is sleeved on the outside of the driving inner cylinder, and both ends are separately connected the top connection and the conversion connects
Head.
Driving arm is arranged between the driving outer cylinder and the driving inner cylinder, for fixing the control assembly, institute
State motor driver and annular battery.
Specifically, preferably, the driving arm includes:
First groove is arranged on the side wall of the driving arm, for accommodating the control assembly.
Second groove is arranged on the side wall of the driving arm, for accommodating the motor driver.
Annular groove is arranged on the side wall of the driving arm, for accommodating the annular battery.
Specifically, preferably, having one section of annular space, the motor between the driving arm and the crossover sub
It is arranged in the annular space.
Specifically, preferably, the outer wall thread of the top connection and the driving inner cylinder is tightly connected, with the driving
The inner thread of outer cylinder is tightly connected.
Specifically, preferably, the control assembly includes: that the signal being sequentially electrically connected sends and receivees module, signal
Conversion module, signal processing module.
Technical solution provided in an embodiment of the present invention has the benefit that
Automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention increases on the top of crossover sub and drives cylinder, and
Control assembly, motor driver, the motor that setting is sequentially electrically connected in the side wall of cylinder are driven, is existed by motor driven sealing bar
Pressure transmission is moved in channel, to carry out Electronic control by opening of the sealing bar to pressure transmission channel.Pass through the radial direction in crossover sub
Displacement sensor is set in channel, is detected by position of the displacement sensor to sealing bar, and will test result and be sent to
Assembly is controlled, when displacement sensor detects that sealing bar makes pressure transmission channel in the open state, control assembly is to motor driven
Device issues stop signal, and sealing bar is made to stop movement.After pressure transmission channel is opened, highly pressurised liquid in fracturing sliding bush inner cavity will be through
Radial passage enters pressure transmission channel, applies downward pressure to sliding sleeve by highly pressurised liquid, until shear pin is cut, sliding sleeve
It moves downward, so that the first sandblasting hole be made to be connected to the second sandblasting hole, realizes the opening of fracturing sliding bush.The embodiment of the present invention provides
Automatically controlled toe-end fracturing sliding bush controlled by opening of the electric signal to sliding sleeve, control process precisely, it is reliable, avoid existing
Uncertainty caused by the opening of sliding sleeve is controlled in technology by pressure, improves the success rate of sliding sleeve smooth opening, and grasp
Make it is safe, easy to use, be suitable for large-scale promotion application.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structure chart of automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention；
Fig. 2 is the partial enlarged view of automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention；
Fig. 3 is the structure chart of driving arm provided in an embodiment of the present invention.
Appended drawing reference respectively indicates:
1 sliding sleeve inner cylinder,
101 first sandblasting holes,
2 crossover subs,
201 pressure transmission channels,
202 radial passages,
3 lower contacts,
4 sliding sleeve outer cylinders,
401 second sandblasting holes,
5 sliding sleeves,
6 driving cylinders,
601 control assemblies,
602 motor drivers,
603 motors,
604 driving inner cylinders,
605 driving outer cylinders,
606 driving arms,
7 top connections,
8 sealing bars,
9 displacement sensors,
10 butter solids.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below
Step ground detailed description.
The embodiment of the invention provides a kind of automatically controlled toe-end fracturing sliding bushs, as shown in Figure 1 and Figure 2, the fracturing sliding bush
It include: sliding sleeve inner cylinder 1, both ends are connect with crossover sub 2 and lower contact 3 respectively, and the first sandblasting hole 101 is provided on barrel；It is sliding
Outer cylinder 4 is covered, the outside of sliding sleeve inner cylinder 1 is sleeved on, both ends connects with crossover sub 2 and lower contact 3 respectively, are provided on barrel and the
Corresponding second sandblasting hole 401 in one sandblasting hole, 101 position；Sliding sleeve 5 is fixed on sliding sleeve inner cylinder 1 and sliding sleeve by shear pin
In annular space between outer cylinder 4.
The fracturing sliding bush further include: driving cylinder 6, both ends are connect with crossover sub 2 and top connection 7 respectively, inner cavity and cunning
The inner cavity of set inner cylinder 1 is connected, and the control assembly 601 being sequentially electrically connected, motor driver 602, motor are provided in side wall
603；Pressure transmission channel 201 is axially arranged in the side wall of crossover sub 2, and between sliding sleeve inner cylinder 1 and sliding sleeve outer cylinder 4
Annular space is connected；Radial passage 202 is arranged radially in the side wall of crossover sub 2, and with pressure transmission channel 201 and driving cylinder
The inner cavity of body 6 is connected；Sealing bar 8 is protruded into pressure transmission channel 201 or is retracted by the driving of motor 603；Displacement sensor 9, setting
It is electrically connected in radial passage 202, and with control assembly 601, for detecting the position of sealing bar 8.
The working principle of automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention is illustrated below:
Lower part is equipped in the staged fracturing tool string tripping in pit shaft of automatically controlled toe-end fracturing sliding bush, automatically controlled toe-end pressure break is sliding
The bottom of set is also connected with the oil pipe with plug, so that the inner cavity of staged fracturing tool string is closed, guarantees the progress of pressure testing.
During staged fracturing tool string tripping in pit shaft, sliding sleeve 5 is fixed on sliding sleeve inner cylinder 1 and sliding sleeve by shear pin
In annular space between outer cylinder 4, separate the first sandblasting hole 101 with the second sandblasting hole 401, i.e., fracturing sliding bush 5 is in close state.
After the completion of pressure testing in pit shaft, operator is issued by well head wireless signal transmitting device to control assembly 601
Enabling signal, control assembly 601 receive the signal and issue enabling signal to motor driver 602 again, pass through motor driver
602 driving motors 603 rotation, move upwards sealing bar connect with motor 603 8, up to displacement sensor 9 can't detect it is close
Bar 8 is sealed, i.e. sealing bar 8 no longer plays plugging action to pressure transmission channel 201, and pressure transmission channel 201 is in the open state, pressure transmission channel
201 are connected with radial passage 202.Testing result at this time is sent to control assembly 601 by displacement sensor 9, controls assembly
601 issue stop signal to motor driver 602, and motor 603 no longer rotates, and sealing bar 8 also no longer moves upwards.Pressure transmission channel
After 201 open, the highly pressurised liquid in fracturing sliding bush inner cavity will enter pressure transmission channel 201 through radial passage 202, pass through high pressure liquid
Body applies downward pressure to sliding sleeve 5, until shear pin is cut, sliding sleeve 5 is moved downward, to make the first sandblasting hole 101
It is connected to the second sandblasting hole 401, realizes the opening of fracturing sliding bush 5.After fracturing sliding bush 5 is opened, then successively carry out subsequent segmentation
Fracturing work.
Automatically controlled toe-end fracturing sliding bush 5 provided in an embodiment of the present invention increases driving cylinder 6 on the top of crossover sub 2, and
The control assembly 601, motor driver 602, motor 603 being sequentially electrically connected are set on the side wall of driving cylinder 6, pass through motor
603 driving the moving up and down in pressure transmission channel 201 of sealing bar 8, to beat Push And Release to pressure transmission channel 201 by sealing bar 8
Close carry out Electronic control.By the way that displacement sensor 9 is arranged in the radial passage of crossover sub 2 202, pass through displacement sensor 9
The position of sealing bar 8 is detected, and will test result and be sent to control assembly 601, by control assembly 601 to sealing bar
8 movement position is controlled, and then realizes the control to fracturing sliding bush open and close status.It is provided in an embodiment of the present invention
Automatically controlled toe-end fracturing sliding bush 5 is controlled by opening of the electric signal to sliding sleeve 5, and control process precisely, reliably, avoids existing
Uncertainty caused by the opening of sliding sleeve 5 is controlled in technology by pressure, improves the success rate of 5 smooth opening of sliding sleeve, and
Safe operation, it is easy to use, be suitable for large-scale promotion application.
Specifically, automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention can be divided into two parts up and down, upper part
To drive pipe nipple, including driving cylinder 6, lower part is divided into sliding-sleeve nipple, including sliding sleeve inner cylinder 1, sliding sleeve outer cylinder 4 and sliding sleeve 5.Driving
Connected between pipe nipple and sliding-sleeve nipple by crossover sub 2, connect at the top of driving pipe nipple with top connection 7, sliding-sleeve nipple bottom and
Lower contact 3 connects.The setting of top connection 7 and lower contact 3, convenient for its in automatically controlled toe-end fracturing sliding bush and staged fracturing tool string
He is connected component.
Sliding-sleeve nipple is the part for realizing automatically controlled toe-end fracturing sliding bush basic function.Sliding sleeve outer cylinder 4 is sleeved on sliding sleeve inner cylinder 1
Outside, and there are certain gap between sliding sleeve inner cylinder 1, the both ends of sliding sleeve outer cylinder 4 and sliding sleeve inner cylinder 1 respectively with conversion
Connector 2 and lower contact 3 connect.Sliding sleeve 5 is fixed in the annular space between sliding sleeve inner cylinder 1 and sliding sleeve outer cylinder 4 by shear pin.It is sliding
The axial length of set 5 is less than the axial length of annular space between sliding sleeve inner cylinder 1 and sliding sleeve outer cylinder 4, to guarantee that sliding sleeve 5 can be in annular space
In move downwardly to the first sandblasting hole 101 and the position below of the second sandblasting hole 401, enable the first sandblasting hole 101 and second
Sandblasting hole 401 is connected to, even if the inner cavity of sliding sleeve inner cylinder 1 is connected with pit shaft, enables highly pressurised liquid in sliding sleeve inner cylinder 1 from spray
Sand hole sprays, it is ensured that fracturing work is gone on smoothly.
In order to guarantee that the closing of automatically controlled toe-end fracturing sliding bush, sliding sleeve inner cylinder 1 and sliding sleeve 5 are connected by the sealing of the first sealing ring
It connects, sliding sleeve 5 and sliding sleeve outer cylinder 4 are tightly connected by the second sealing ring.For example, the upper and lower part point of the inner sidewall in sliding sleeve 5
Not She Zhi one circle sealed groove, the first sealing ring is put into sealed groove, thus by the first sealing ring make sliding sleeve inner cylinder 1 and
Sliding sleeve 5 is tightly connected, avoid gap leakage of the highly pressurised liquid between sliding sleeve inner cylinder 1 and sliding sleeve 5 and cause sliding sleeve 5 be difficult to by
Lower promotion, anti-anti-skid sheath 5 open failure.The one circle sealed groove of setting on the top of 4 inner sidewall of sliding sleeve outer cylinder, in sealed groove
It is put into the second sealing ring, to make sliding sleeve outer cylinder 4 and sliding sleeve 5 be tightly connected by the second sealing ring, avoids the impurity in pit shaft
The annular space between sliding sleeve outer cylinder 4 and sliding sleeve inner cylinder 1 is penetrated into, the unlatching of sliding sleeve 5 is impacted.In order to improve sealing effect, the
One sealing ring and the second sealing ring can be set to multiple.
Sliding sleeve outer cylinder 4 is connect with lower contact 3 with the lower part of sliding sleeve inner cylinder 1, specifically, lower contact 3 and sliding sleeve inner cylinder 1
Outer wall thread is tightly connected, and is tightly connected with the inner thread of sliding sleeve outer cylinder 4.Sealed connection can be realized by sealing ring.It is logical
It crosses lower contact 3 to close the lower part of sliding-sleeve nipple, to pass through sliding sleeve outer cylinder 4,3 shape of sliding sleeve inner cylinder 1, sliding sleeve 5 and lower contact
At a closed toroidal cavity, reserve sufficient space for moving down for sliding sleeve 5, guarantee automatically controlled toe-end fracturing sliding bush at
Function is opened.
Crossover sub 2 for connect sliding-sleeve nipple and driving pipe nipple, for the ease of sliding-sleeve nipple and driving pipe nipple dismounting,
It avoids sliding-sleeve nipple and drives the loosening of pipe nipple, the outer wall of crossover sub 2 and sliding sleeve inner cylinder 1 is tightly connected, with sliding sleeve outer cylinder 4
Inner thread is tightly connected, and is connect with driving 6 thread seal of cylinder.Sealed connection can be realized by sealing ring, so that sliding sleeve
Pipe nipple and driving pipe nipple pass through crossover sub 2 and are connected to become a sealing, firm entirety, prevent in automatically controlled toe-end fracturing sliding bush
The leakage of chamber mesohigh liquid guarantees the safety work of automatically controlled toe-end fracturing sliding bush.
As shown in Fig. 2, it is additionally provided with radial passage 202 in the side wall of crossover sub 2, is coated in radial passage 202 solid
Body butter 10, for the cement slurry blocking after preventing radial passage 202 to be solidified.In the pressure transmission channel of automatically controlled toe-end fracturing sliding bush
Before 201 open, need into staged fracturing tool string that carry out well cementing operation, cement slurry is easy to be trapped in diameter grout injection
It will cause the blocking of radial passage 202 into channel 202, after solidification, to influence the opening of automatically controlled toe-end fracturing sliding bush.Therefore,
It needs to coat butter solid 10 resistant to high temperature in radial passage 202, enters radial direction in the cement slurry for preventing solid phase particles more
While channel 202, highly pressurised liquid is allowed to flow through radial passage 202, to guarantee that highly pressurised liquid is able to enter pressure transmission channel
201, realize the opening of automatically controlled toe-end fracturing sliding bush, while avoiding the blocking of radial passage 202.
It is additionally provided with displacement sensor 9 in the radial passage 202 of crossover sub 2, for the ease of displacement sensor 9 and control
The electrical connection of assembly 601 is additionally provided with longitudinal cable passage on the side wall of crossover sub 2, convenient for passing through for cable, guarantees displacement
Sensor 9 is electrically connected with control assembly 601.
Driving cylinder 6 is used to drive the movement of sealing bar 8, to control the opening and closure in pressure transmission channel 201.Drive cylinder
6 include: driving inner cylinder 604, and both ends are separately connected top connection 7 and crossover sub 2；Outer cylinder 605 is driven, driving inner cylinder is sleeved on
604 outsides, and both ends are separately connected top connection 7 and crossover sub 2；Driving arm 606, setting is in driving outer cylinder 605 and driving
Between inner cylinder 604, for fixed control assembly 601 and motor driver 602.
Driving inner cylinder 604 is connected with sliding sleeve inner cylinder 1, is used for 1 conveying high-pressure liquid of pressure transmission channel 201 and sliding sleeve inner cylinder
Body, to carry out fracturing work.It drives the internal diameter of inner cylinder 604 consistent with the internal diameter of sliding sleeve inner cylinder 1, is 112mm, so that automatically controlled toe
It holds fracturing sliding bush consistent with the whole internal diameter of staged fracturing tool string, ensure that the integrality of staged fracturing tool string.Driving is outer
Cylinder 605 is sleeved on the outside of driving inner cylinder 604, for carrying out to the equipment between driving inner cylinder 604 and driving 605 annular space of outer cylinder
Protection.The setting of driving arm 606 is driven between driving outer cylinder 605 and driving inner cylinder 604 for fixed control assembly 601, motor
Dynamic device 602 and annular battery.
As shown in Fig. 3, driving arm 606 includes: the first groove, is arranged on the side wall of driving arm 606, for holding
It receives and controls assembly 601；Second groove is arranged on the side wall of driving arm 606, for accommodating motor driver 602；Annular groove
(left end of driving arm 606 in attached drawing 3), is arranged on the side wall of driving arm 606, for accommodating annular battery.Control
Assembly 601 processed is electrically connected with motor driver 602, is adjusted for the working condition to motor 603.Motor driver 602 is logical
It crosses shaft coupling to connect with motor 603, the up and down motion of sealing bar 8 is adjusted by the control of 603 working condition of motor.Ring
Shape battery can provide power supply with electric device for control assembly 601, motor driver 602 etc., eliminate the tripping in electricity into pit shaft
The link of cable makes the more convenient to use of automatically controlled toe-end fracturing sliding bush.Meanwhile annular battery is embedded in annular groove, makes to drive
Cylinder 6 it is compact-sized, convenient for driving cylinder 6 enter pit shaft in carry out operation.
The axial length of driving arm 606 is slightly less than driving outer cylinder 605 and drives the axial direction of annular space between inner cylinder 604 long
Degree, i.e., have one section of annular space between driving arm 606 and crossover sub 2, motor 603 is arranged in the annular space.
Driving outer cylinder 605 is arranged in motor 603 and is driven in the annular space between inner cylinder 604, so that automatically controlled toe-end fracturing sliding bush structure
It is compact, and overall appearance is convenient in automatically controlled toe-end fracturing sliding bush tripping in pit shaft in the tubulose of rule.
Control assembly 601 is the core element of electric control part in automatically controlled toe-end fracturing sliding bush, and control assembly 601 includes: suitable
The signal of secondary electrical connection sends and receivees module, signal conversion module, signal processing module.
Operator needs the working condition to control assembly 601 to control, therefore controls and need to be arranged in assembly 601
Signal sends and receivees module.Module is sended and received by signal, makes to control assembly 601 and well head wireless signal transmitting device
Establish communication.After the completion of well cementation, pressure testing, is issued and started to work to control assembly 601 by well head wireless signal transmitting device
Electromagnetic wave signal, with starting control assembly 601.It, can be to motor driver after control assembly 601 opens pressure transmission channel 201
602 send stop signal, and highly pressurised liquid enters pressure transmission channel 201 and applies downward pressure to sliding sleeve 5 at this time, to realize electricity
Control the opening of toe-end fracturing sliding bush.
Signal conversion module is amplified for signal to be sended and received the analog signal that module receives, and by its turn
Digital signal is changed into, in order to which signal processing module handles the signal.Signal processing module is to the signal transmitted
After being handled, feedback can be also made, issues new digital signal, which also is converted into simulating through signal conversion module
It after signal, is transmitted to signal and sends and receivees module, to send stop signal to motor driver 602.
Signal processing module is for being decoded processing to the digital signal received.Signal processing module receives starting
After the signal for controlling assembly 601, module can be sended and received by signal to motor driver 602 and issues enabling signal, is passed through
602 driving motor 603 of motor driver is gradually opened pressure transmission channel 201 so that sealing bar 8 be driven to run up.It is same with this
When, displacement sensor 9 always detects the position of sealing bar 8, and will test result and be sent to signal processing module.It is such as attached
Shown in Fig. 2, displacement sensor 9 is corresponding with the position of sealing bar 8, and sealing bar 8 is connect with motor 603, and motor 603 is fixed on drive
In annular space between dynamic outer cylinder 605 and driving inner cylinder 604, and it can drive sealing bar 8 that can stretch out outside motor 603 or retract electricity
In machine 603, it is adjusted with sealing bar 8 being protruded into or being exited the state in pressure transmission channel 201.When sealing bar 8 protrudes into pressure transmission channel
When in 201, the detection signal that displacement sensor 9 issues forwards can be blocked by sealing bar 8, illustrate that sealing bar 8 is logical in pressure transmission
In road 201, pressure transmission channel 201 is not connected to radial passage 202, and pressure transmission channel 201 is in sealed condition.When sealing bar 8 is in electricity
It is constantly retracted upwards under the driving of machine 603, until displacement sensor 9 issues forwards when moving to the top of displacement sensor 9
Detection signal be no longer influenced by blocking, illustrate that sealing bar 8 leaves pressure transmission channel 201, pressure transmission channel 201 and radial passage at this time
202 are connected, and pressure transmission channel 201 is in the open state.Letter of the displacement sensor 9 by pressure transmission channel 201 in the open state
Number it is transferred to signal processing module, after signal processing module is handled, module is sended and received to motor driver by signal
602 issue stop signal, and motor 603 is made to stop operating, and the stopping of sealing bar 8 moves upwards, and avoid the waste of electric energy.At this point, electric
Controlling the highly pressurised liquid in fracturing sliding bush inner cavity will enter in pressure transmission channel 201, and automatically controlled toe-end fracturing sliding bush is opened, is carried out
Subsequent staged fracturing operation.
In order to avoid the element in driving 6 side wall of cylinder is by liquid corrosion, the top of cylinder 6 is driven to connect with top connection 7,
The outer wall thread of top connection 7 and driving inner cylinder 604 is tightly connected, and is tightly connected with the inner thread of driving outer cylinder 605, to prevent
The leakage of liquid corrodes electric elements.
Automatically controlled toe-end fracturing sliding bush provided in an embodiment of the present invention, is applicable not only to low permeability oil field, shale gas field, also suitable
For the staged fracturing of the natural gas well, coal bed gas well, using good in horizontal well, vertical well, high angle hole.In addition, should
Automatically controlled toe-end fracturing sliding bush especially suitable for deep-well long horizontal sections shale gas (vertical depth >=3500m, horizontal section length >=
1500m) the staged fracturing operation of well.
The foregoing is merely presently preferred embodiments of the present invention, the protection scope being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (7)
1. a kind of automatically controlled toe-end fracturing sliding bush, comprising: sliding sleeve inner cylinder (1), both ends respectively with crossover sub (2) and lower contact (3)
It connects, is provided with the first sandblasting hole (101) on barrel；
Sliding sleeve outer cylinder (4) is sleeved on the outside of the sliding sleeve inner cylinder (1), both ends respectively with the crossover sub (2) and it is described under connect
Head (3) connects, and is provided with second sandblasting hole (401) opposite with first sandblasting hole (101) on barrel；
Sliding sleeve (5) is fixed in the annular space between the sliding sleeve inner cylinder (1) and the sliding sleeve outer cylinder (4) by shear pin；
It is characterized in that, the fracturing sliding bush further include:
It drives cylinder (6), driving cylinder (6) inner cavity is connected with the inner cavity of the sliding sleeve inner cylinder (1), is provided in side wall
Control assembly (601), motor driver (602), the motor (603) being sequentially electrically connected；
The driving cylinder (6) includes: driving inner cylinder (604), and both ends are separately connected top connection (7) and the crossover sub (2)；
It drives outer cylinder (605), is sleeved on the outside of the driving inner cylinder (604), and both ends are separately connected the top connection (7) and described turn
Changing-over head (2)；
Driving arm (606) is arranged between the driving outer cylinder (605) and the driving inner cylinder (604), described in fixed
Control assembly (601), the motor driver (602) and annular battery；
The driving arm (606) includes: the first groove, is arranged on the side wall of the driving arm (606), for accommodating
State control assembly (601)；Second groove is arranged on the side wall of the driving arm (606), for accommodating the motor driven
Device (602)；Annular groove is arranged on the side wall of the driving arm (606), for accommodating the annular battery；
There is one section of annular space between the driving arm (606) and the crossover sub (2), motor (603) setting exists
In the annular space；
Pressure transmission channel (201), is axially arranged in the side wall of the crossover sub (2), and with the sliding sleeve inner cylinder (1) and institute
State the annular space connection between sliding sleeve outer cylinder (4)；
Radial passage (202), is arranged radially in the side wall of the crossover sub (2), and with the pressure transmission channel (201) and
The inner cavity connection of driving cylinder (6)；
Sealing bar (8), the sealing bar (8) connect with the motor (603), protrude into the biography by the motor (603) driving
In pressure passageway (201) or retract；
Displacement sensor (9), setting are electrically connected with the control assembly (601) in the radial passage (202), are used for
Detect the position of the sealing bar (8).
2. fracturing sliding bush according to claim 1, which is characterized in that the sliding sleeve inner cylinder (1) passes through with the sliding sleeve (5)
First sealing ring is tightly connected, and the sliding sleeve (5) and the sliding sleeve outer cylinder (4) are tightly connected by the second sealing ring.
3. fracturing sliding bush according to claim 1, which is characterized in that the crossover sub (2) and the sliding sleeve inner cylinder (1)
Outer wall be tightly connected, be tightly connected with the inner thread of the sliding sleeve outer cylinder (4), with driving cylinder (6) thread seal
Connection.
4. fracturing sliding bush according to claim 1, which is characterized in that the lower contact (3) and the sliding sleeve inner cylinder (1)
Outer wall thread is tightly connected, and is tightly connected with the inner thread of the sliding sleeve outer cylinder (4).
5. fracturing sliding bush according to claim 1, which is characterized in that be coated with butter solid in the radial passage (202)
(10), it is blocked for the cement slurry after preventing the radial passage (202) to be solidified.
6. fracturing sliding bush according to claim 1, which is characterized in that the top connection (7) and the driving inner cylinder (604)
Outer wall thread be tightly connected, with it is described driving outer cylinder (605) inner thread be tightly connected.
7. fracturing sliding bush according to claim 1, which is characterized in that the control assembly (601) includes: sequentially to be electrically connected
Signal send and receive module, signal conversion module, signal processing module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710400533.2A CN107288602B (en) | 2017-05-31 | 2017-05-31 | A kind of automatically controlled toe-end fracturing sliding bush |
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| CN201710400533.2A CN107288602B (en) | 2017-05-31 | 2017-05-31 | A kind of automatically controlled toe-end fracturing sliding bush |
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| CN107288602B true CN107288602B (en) | 2019-11-12 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179998A (en) * | 2017-12-12 | 2018-06-19 | 中国石油天然气集团公司 | Cable transmission pressure blasting perforation system and perforating methods |
| CN108425656A (en) * | 2018-03-16 | 2018-08-21 | 江苏航天鸿鹏数控机械有限公司 | The cementing well stage collar and control method controlled by geostatic pressure wave |
| CN108518198A (en) * | 2018-03-16 | 2018-09-11 | 江苏航天鸿鹏数控机械有限公司 | Remote control hydraulic pressure cementing well stage collar and control method |
| CN108518197A (en) * | 2018-03-16 | 2018-09-11 | 江苏航天鸿鹏数控机械有限公司 | The cementing well stage collar and control method controlled by downhole optic fiber |
| CN109339757B (en) * | 2018-08-21 | 2021-03-09 | 中国石油天然气股份有限公司 | Time-delay sliding sleeve |
| CN114320228B (en) * | 2021-12-25 | 2023-02-28 | 四川大学 | Underground self-generating electric control type switch sliding sleeve |
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| CN107288602A (en) | 2017-10-24 |
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