CN108343396A - A kind of remote pressure control self-sealing underground pressure difference sliding sleeve - Google Patents
A kind of remote pressure control self-sealing underground pressure difference sliding sleeve Download PDFInfo
- Publication number
- CN108343396A CN108343396A CN201810103681.2A CN201810103681A CN108343396A CN 108343396 A CN108343396 A CN 108343396A CN 201810103681 A CN201810103681 A CN 201810103681A CN 108343396 A CN108343396 A CN 108343396A
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- China
- Prior art keywords
- sliding sleeve
- underground
- pressure difference
- pressure
- outer housing
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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
-
- 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
- E21B34/16—Control means therefor being outside the borehole
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The present invention provides a kind of remote pressure control self-sealing underground pressure difference sliding sleeve, belong to oil/gas well reservoir reconstruction field, including outer housing (1), flap seat slot (2), sliding sleeve valve (3), outer sleeve (4), battery (5), lower contact (6), shear pin (7), through-hole (8), flap (9), battery (5), underground control circuit board (14) is installed in the groove body opened up on outer housing (1) outer wall, pressure-sensitive end on the outside of down-hole pressure transmitter (15) is contacted with downhole well fluid, the lead end of inside is arranged in groove body.The present invention can be opened in ground remote control underground pressure difference sliding sleeve, need pitching or tripping in sliding sleeve switch instrument to open relative to existing underground sliding sleeve, easy to operate；And the case where for same well tripping in multiple underground pressure difference sliding sleeves, it can be that each underground pressure difference sliding sleeve distribute different control instructions, the mutual indepedent control unlatching between multiple underground pressure difference sliding sleeves in same well may be implemented.
Description
Technical field
The invention belongs to oil/gas well reservoir reconstruction fields more particularly to a kind of remote pressure control self-sealing underground pressure difference to slide
Set.
Background technology
Currently, oil field layered treatment process, testing set, testing leakage etc. and be connected to down-hole switch work commonly using various oil jackets in tubing strings
Tool.Patent publication No 200520106918.0 (double sand blower of sliding sleeve), due to being needed afterwards in place under its Structural Design Requirement tool
Pitching can just be suppressed, and channel is made to open, and when having dirty, sand production for pit shaft, there are pitching is not in place or pitching
The problems such as waiting for a long time afterwards；Occur pitching it is not in place when, the packer of string matching cannot be set, only originally former tubing string weight
It could be worked normally under new, influence the normal work in oil field.
The patent No. 200920088637.5 (underground switch slide bushing), by top connection, central tube, sealing piston, pressure drop piston,
Spring, pressure regulation cap form, and are a step on the inner tubal wall in the middle part of central tube, and the internal diameter of the step is less than the interior of central tube upper end
Diameter, pressure drop piston outside are variable-diameter structure, are mounted on by shear pin on the inner wall on central tube top, pressure drop piston upper/lower terminal
Be separately installed with sealing ring, the lower part of central tube is equipped with pressure regulation cap by screw thread, and by surely following closely fixation, pressure regulation cap with above connect
It is cased with sealing piston and spring in center pipe outer wall between head；It is provided on the position corresponding with sealing piston of center and center
Manage the fluid hole being connected with the annular space that pressure drop piston is formed.
Above-mentioned underground switch slide bushing is squeezed in oil field layered pressure break, seperated layer water injection, layering to be blocked up, tests set, tests the measures such as leakage construction
In, tubing string in place after, suppressed by tubing string, you can so that oil jacket is connected to, after the completion of measure, stop suppressing, you can partition oil jacket ring
Sky prevents stratum liquid from entering in tubing string, realizes stratum pressurize.But above-mentioned apparatus, there are when a deficiency, spring is using
There is deformation in the process, requirement cannot be met after being used for multiple times.
In existing design, there are the devices that multiple sliding sleeves are placed in underground, and it carries out staged fracturing acidification, need when construction
It is separately turned on.It such as uses pitching sliding sleeve, segmentation series to be restricted, and manages interior latus rectum and be limited, be unfavorable for later stage exploitation；Such as
Fruit uses underground sliding bush switching tool open sliding sleeve, then there is a problem of that duty cycle is long, cost is excessively high.
Invention content
It is an object of the invention to solve the problems of the above-mentioned prior art, a kind of remote pressure control self-sealing is provided
Underground pressure difference sliding sleeve can realize the channel that quickly packing casing/oil tube fluid circulates downwards, and pass through the outspoken speed of surface well
The open sliding sleeve that builds the pressure realizes the connection of outer fluid in annular space oil jacket.
The present invention adopts the following technical scheme that：
A kind of remote pressure control self-sealing underground pressure difference sliding sleeve, including it is outer housing 1, flap seat slot 2, sliding sleeve valve 3, outer
Sleeve 4, battery 5, lower contact 6, shear pin 7, through-hole 8, flap 9, valve limiting lock 10, hinge 11, lock executing agency 12, first are close
Seal 13, underground control circuit board 14, down-hole pressure transmitter 15, the second sealing ring 16.
Battery 5, underground control circuit board 14 are mounted in the groove body on outer housing 1,15 outside of down-hole pressure transmitter
Pressure-sensitive end is contacted with the fluid in pit shaft, and the lead end of inside is in groove body, from threaded and sealing ring in the middle part of pressure transmitter,
For external fluid to be isolated.
Outer sleeve 4 is connected through a screw thread with outer housing 1, and the first seal groove, the second seal groove are also set up on outer housing 1,
First sealing ring 13 is set in the first seal groove, and the second sealing ring 16 is set in the second seal groove, and outer sleeve 4, first is close
Seal 13, the second sealing ring 16 seal groove body, realize by battery 5, underground control circuit board 14, down-hole pressure transmitter 15 with
Fluid isolation in pit shaft.
Sliding sleeve valve 3 is provided on the inner wall of outer housing 1, sliding sleeve valve 3 is fixed on by shear pin 7 on outer housing 1, sliding sleeve
Third groove body, the 4th groove body are offered on valve 3, and sealing ring is both provided in third groove body, the 4th groove body, is gone back on outer housing 1
Be provided with through-hole 8, through-hole 8 between third groove body and the 4th groove body, be additionally provided on sliding sleeve valve 3 flap 9 and with flap 9
Corresponding flap seat slot 2, flap 9 are fixed on by valve limiting lock 10 on outer housing 1,10 bottom of valve limiting lock and outer housing
Hinge 11 is additionally provided between 1, lower contact 6 is installed on outer housing 1, and positioned at the downside of outer sleeve 4.
The down-hole pressure transmitter 15 acquires the signal that ground is sent, and signal is passed to underground control circuit board
14, down-hole pressure transmitter 15 is connected with 14 signal of underground control circuit board, underground control circuit board 14 and lock executing agency 12
Signal is connected, and lock executing agency 12 is connected with valve limiting lock 10.
The present invention can be opened in ground remote control underground pressure difference sliding sleeve, relative to existing underground sliding sleeve need pitching or
Tripping in sliding sleeve switch instrument opening ways, it is easy to operate；And the case where for same well tripping in multiple underground pressure difference sliding sleeves, energy
Enough it is that each underground pressure difference sliding sleeve distributes different control instructions, may be implemented in same well between multiple underground pressure difference sliding sleeves
Mutual indepedent control open.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is closed state structural schematic diagram of the present invention；
Fig. 3 is open state structural schematic diagram of the present invention；
Fig. 4 is the schematic diagram that the present invention realizes that pressure difference sliding sleeve is opened by pressure.
In figure：1- outer housings, 2- flaps seat slot, 3- sliding sleeves valve, 4- outer sleeves, 5- batteries, 6- lower contacts, 7- shear pins,
8- through-holes, 9- flaps, 10- valves limiting lock, 11- hinges, 12- locks executing agency, the first sealing rings of 13-, the undergrounds 14- control electricity
Road plate, 15- down-hole pressures transmitter, the second sealing rings of 16-, the ground 17- high voltage power equipment, 18- well heads, 19- casings/oil
Pipe, 20- sliding sleeves 1,21- sliding sleeves 2,22- sliding sleeves n.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the technical solution below in the present invention carries out clear
Chu is fully described by, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of remote pressure control self-sealing underground pressure difference sliding sleeve of the present invention, including outer housing 1, flap
Seat slot 2, sliding sleeve valve 3, outer sleeve 4, battery 5, lower contact 6, shear pin 7, through-hole 8, flap 9, valve limiting lock 10, hinge 11,
Lock executing agency 12, the first sealing ring 13, underground control circuit board 14, down-hole pressure transmitter 15, the second sealing ring 16.
Battery 5, underground control circuit board 14 are mounted in the groove body opened up on 1 outer wall of outer housing, down-hole pressure transmitter
The pressure-sensitive end in 15 outsides is contacted with downhole well fluid, and the lead end of inside is mounted in groove body, 15 middle part of down-hole pressure transmitter
Prevent fluid from entering groove body for external fluid to be isolated from threaded and sealing ring.
Outer sleeve 4 is connected through a screw thread with outer housing 1, and the first seal groove, the second seal groove are also set up on outer housing 1,
First sealing ring 13 is set in the first seal groove, and the second sealing ring 16 is set in the second seal groove, and outer sleeve 4, first is close
Battery 5, underground control circuit board 14 are sealed in groove body by seal 13, the second sealing ring 16, and realization is isolated with downhole well fluid.
Sliding sleeve valve 3 is provided on the inner wall of outer housing 1, sliding sleeve valve 3 is fixed on by shear pin 7 on outer housing 1, sliding sleeve
Third groove body, the 4th groove body are offered on valve 3, and sealing ring is both provided in third groove body, the 4th groove body, is gone back on outer housing 1
Offer through-hole 8, through-hole 8 between third groove body and the 4th groove body, be additionally provided on sliding sleeve valve 3 flap 9 and with flap 9
Corresponding flap seat slot 2, flap 9 are fixed on by valve limiting lock 10 on outer housing 1,10 bottom of valve limiting lock and outer housing
Hinge 11 is additionally provided between 1, lower contact 6 is installed on outer housing 1, and positioned at the downside of outer sleeve 4.
The down-hole pressure transmitter 15 acquires the signal that ground is sent, and it is defeated that signal is converted to standard analog signal
Go out, 15 signal output end of down-hole pressure transmitter is connected with 14 signal input part of underground control circuit board, underground control circuit board
14 are connected with 12 signal of executing agency is locked, and lock executing agency 12 is connected with valve limiting lock 10.
Further technical solution be further include casing/oil pipe 19, several self-sealing underground pressure difference sliding sleeves are mounted on set
On pipe/oil pipe 19, it is sent into underground together.
Further preferred technical solution is that the 5th seal groove, the 5th seal groove are additionally provided on the sliding sleeve valve 3
Sealing ring is inside installed, the 5th seal groove is located at 2 lower section of flap seat slot, and the effect of the 5th seal groove is, when flap 9 is in flap
After in seat slot 2, the 5th seal groove realizes the fluid of packing 9 upper and lower end of flap with flap 9 jointly.
Further technical solution is that the multiple pressure difference sliding sleeves of installation are in the different height of casing/oil pipe 19, well in a well
The different control instruction of setting in lower control circuit board 14 realizes that underground pressure difference sliding sleeve is independently opened, as there is sliding sleeve in underground
I20, sliding sleeve II21 ..., sliding sleeve n22, realize that the independent of pressure difference sliding sleeve is opened respectively by the way that different control instruction is arranged.
Further technical solution is that the multiple pressure difference sliding sleeves of installation are in the different height of casing/oil pipe 19, well in a well
Lower control circuit board 14 is arranged to identical control instruction, underground pressure difference sliding sleeve while being opened when needing, as there is sliding sleeve in underground
I20, sliding sleeve | | 21 ..., sliding sleeve n22, opened while realizing pressure difference sliding sleeve respectively by the way that identical control instruction is arranged.
The working method of the present invention：
As shown in figure 4, after pressure difference sliding sleeve is sent into underground with casing or 19 tubing string of oil pipe, starting differential pressure sliding sleeve is needed
When：
Ground sends signal, and down-hole pressure transmitter 15 acquires the pressure signal that ground high voltage power equipment 17 is sent, and
Pressure signal is transferred in the form of standard analog signal underground control circuit board 14, underground control circuit board 14 is to underground pressure
The signal that power transmitter 15 is sent is handled, and is converted into one group of binary code and is identified.
As shown in Figure 2,3, if the control instruction of the order received and 14 preset configuration of underground control circuit board not
Match, is then acted without next step；If the control instruction of the order received and 14 preset configuration of underground control circuit board
Match, then the control of underground control circuit board 14 lock executing agency 12 acts, and valve limiting lock 10 is opened, flap 9 in its own gravity and
It is voluntarily closed in the flap seat slot 2 on sliding sleeve valve 3 under the collective effect of 11 reaction force of hinge.
Meanwhile ground high-tension apparatus 17 builds the pressure to well head 18 again, 9 upper flow pressure of flap is flowed more than 9 lower part of flap
Body pressure, sliding sleeve valve 3 moves down after cutting shear pin 7, terminates on the closing in shoulder inside outer housing 4, at this point, being arranged in shell
Through-hole 8 on body 4 is opened, and external fluid enters underground pressure difference sliding sleeve by through-hole 8, and pressure difference sliding sleeve is opened.
Due to casing/oil pipe 19 be sent into multiple pressure difference sliding sleeves and each pressure difference sliding sleeve setting position not
Together, the pressure difference sliding sleeve of different vertical heights is arbitrarily opened by controlling ground signal sending device in this way, you can to different layers position
Oil reservoir exploited.
Certainly with casing/oil pipe 19 be sent into multiple pressure difference sliding sleeves and each pressure difference sliding sleeve setting position not
Together, the open command of pressure difference sliding sleeve can be arranged to identical, same instruction can be achieved in this way and realize the same of all pressure difference sliding sleeves
Shi Kaiqi.
2 embodiment 2 of embodiment is to make following optimization on the basis of embodiment 1：
As shown in Figure 1, a kind of remote pressure control self-sealing underground pressure difference sliding sleeve of the present invention, including outer housing 1, flap
Seat slot 2, sliding sleeve valve 3, outer sleeve 4, battery 5, lower contact 6, shear pin 7, through-hole 8, flap 9, valve limiting lock 10, hinge 11,
Lock executing agency 12, the first sealing ring 13, underground control circuit board 14, down-hole pressure transmitter 15, the second sealing ring 16.
Battery 5, underground control circuit board 14 are mounted in the groove body opened up on 1 outer wall of outer housing, down-hole pressure transmitter
The pressure-sensitive end in 15 outsides is contacted with downhole well fluid, and the lead end of inside is mounted in groove body, 15 middle part of down-hole pressure transmitter
Prevent fluid from entering groove body for external fluid to be isolated from threaded and sealing ring.
Outer sleeve 4 is connected through a screw thread with outer housing 1, and the first seal groove, the second seal groove are also set up on outer housing 1,
First sealing ring 13 is set in the first seal groove, and the second sealing ring 16 is set in the second seal groove, and outer sleeve 4, first is close
Battery 5, underground control circuit board 14 are sealed in groove body by seal 13, the second sealing ring 16, and realization is isolated with downhole well fluid.
Sliding sleeve valve 3 is provided on the inner wall of outer housing 1, sliding sleeve valve 3 is fixed on by shear pin 7 on outer housing 1, sliding sleeve
Third groove body, the 4th groove body are offered on valve 3, and sealing ring is both provided in third groove body, the 4th groove body, is gone back on outer housing 1
Offer through-hole 8, through-hole 8 between third groove body and the 4th groove body, be additionally provided on sliding sleeve valve 3 flap 9 and with flap 9
Corresponding flap seat slot 2, flap 9 are fixed on by valve limiting lock 10 on outer housing 1,10 bottom of valve limiting lock and outer housing
Hinge 11 is additionally provided between 1, lower contact 6 is installed on outer housing 1, and positioned at the downside of outer sleeve 4.
The down-hole pressure transmitter 15 acquires the signal that ground is sent, and it is defeated that signal is converted to standard analog signal
Go out, 15 signal output end of down-hole pressure transmitter is connected with 14 signal input part of underground control circuit board, underground control circuit board
14 are connected with 12 signal of executing agency is locked, and lock executing agency 12 is connected with valve limiting lock 10.
Further preferred technical solution is, flap seat slot 2 uses magnetic material, flap 9 to use ferromagnetic material, in this way,
After valve limiting lock 10 is opened, flap 9 is voluntarily closed under its own gravity and the collective effect of hinge 11 on sliding sleeve valve 3
Flap seat slot 2 on, in this process, flap seat slot 2 itself can by magnetic absorption flap 9, be flap 9 can seat in
One is provided in flap seat slot 2 beneficial to help.
Meanwhile in flap 9 after in flap seat slot 2, due to magnetic adsorptive power between flap 9 and flap seat slot 2
In the presence of, it is ensured that flap 9 is more difficult after flap seat slot 2 to be opened by the effect of opposite force.
Further technical solution be further include casing/oil pipe 19, several self-sealing underground pressure difference sliding sleeves are mounted on set
On pipe/oil pipe 19, it is sent into underground together.
Further preferred technical solution is that the 5th seal groove, the 5th seal groove are additionally provided on the sliding sleeve valve 3
Sealing ring is inside installed, the 5th seal groove is located at 2 lower section of flap seat slot, and the effect of the 5th seal groove is, when flap 9 is in flap
After in seat slot 2, the 5th seal groove realizes the fluid of packing 9 upper and lower end of flap with flap 9 jointly.
Further technical solution is that the multiple pressure difference sliding sleeves of installation are in the different height of casing/oil pipe 19, well in a well
The different control instruction of setting in lower control circuit board 14 realizes that underground pressure difference sliding sleeve is independently opened, as there is sliding sleeve in underground |
20, sliding sleeve | | 21 ..., sliding sleeve n22, realize that the independent of pressure difference sliding sleeve is opened respectively by the way that different control instruction is arranged.
Further technical solution is that the multiple pressure difference sliding sleeves of installation are in the different height of casing/oil pipe 19, well in a well
Lower control circuit board 14 is arranged to identical control instruction, underground pressure difference sliding sleeve while being opened when needing, as there is sliding sleeve in underground |
20, sliding sleeve | | 21 ..., sliding sleeve n22, opened while realizing pressure difference sliding sleeve by the way that identical control instruction is arranged.
The working method of embodiment 2 is the same as embodiment 1.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (5)
1. a kind of remote pressure control self-sealing underground pressure difference sliding sleeve, including outer housing (1), flap seat slot (2), sliding sleeve valve
(3), outer sleeve (4), battery (5), lower contact (6), shear pin (7), through-hole (8), flap (9), valve limiting lock (10), hinge
(11), lock executing agency (12), the first sealing ring (13), underground control circuit board (14), down-hole pressure transmitter (15), second
Sealing ring (16), which is characterized in that battery (5), underground control circuit board (14), which are installed in, to be opened up on outer housing (1) outer wall
In groove body, the pressure-sensitive end on the outside of down-hole pressure transmitter (15) is contacted with downhole well fluid, and the lead end of inside is arranged in groove body
Interior, outer sleeve (4) is connected through a screw thread with outer housing (1), and the first seal groove, the second seal groove are also set up on outer housing (1),
First sealing ring (13) is set in the first seal groove, and the second sealing ring (16) is set in the second seal groove, outer sleeve (4),
First sealing ring (13), the second sealing ring (16) seal groove body, realize battery (5), underground control circuit board (14) and well
The isolation of fluid in cylinder；
Sliding sleeve valve (3) is provided on the inner wall of outer housing (1), sliding sleeve valve (3) is fixed on outer housing (1) by shear pin (7)
On, third groove body, the 4th groove body are offered on sliding sleeve valve (3), are both provided with sealing ring in third groove body, the 4th groove body, outside
Through-hole (8) is further opened on shell (1), between third groove body and the 4th groove body, sliding sleeve valve is also set through-hole (8) on (3)
It is equipped with flap (9) and flap seat slot (2) corresponding with flap (9), flap (9) is fixed on outer housing by valve limiting lock (10)
(1) on, hinge (11) is additionally provided between valve limiting lock (10) bottom and outer housing (1), lower contact (6) is installed on outer housing
(1) on, and positioned at the downside of outer sleeve (4)；
Down-hole pressure transmitter (15) acquires the pressure signal that ground is sent, and it is defeated that pressure signal is converted to standard analog signal
Go out, down-hole pressure transmitter (15) signal output end is connected with underground control circuit board (14) signal input part, underground control electricity
Road plate (14) is connected with lock executing agency (12) signal, and lock executing agency (12) is connected with valve limiting lock (10), and battery (5) is
Control circuit board (14) is powered.
2. a kind of remote pressure control self-sealing underground according to claim 1 pressure difference sliding sleeve, which is characterized in that described
It is additionally provided with the 5th seal groove on sliding sleeve valve (3), sealing ring is installed in the 5th seal groove, the 5th seal groove is located at flap seat
On the downside of slot (2).
3. a kind of remote pressure control self-sealing underground according to claim 2 pressure difference sliding sleeve, which is characterized in that further include
Casing/oil pipe (19), several self-sealing underground pressure difference sliding sleeves are mounted on casing/oil pipe (19), are sent into underground together.
4. a kind of remote pressure control self-sealing underground according to claim 3 pressure difference sliding sleeve, which is characterized in that peace in well
Multiple pressure difference sliding sleeves are filled in the different control of setting in the different height of casing/oil pipe (19), underground control circuit board (14) to refer to
It enables, realizes that underground pressure difference sliding sleeve is independently opened.
5. a kind of remote pressure control self-sealing underground according to claim 3 pressure difference sliding sleeve, which is characterized in that peace in well
Multiple pressure difference sliding sleeves are filled in the identical control of setting in the different height of casing/oil pipe (19), underground control circuit board (14) to refer to
It enables, realizes that underground pressure difference sliding sleeve is opened simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103681.2A CN108343396B (en) | 2018-02-01 | 2018-02-01 | Remote pressure control self-sealing type underground differential pressure sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103681.2A CN108343396B (en) | 2018-02-01 | 2018-02-01 | Remote pressure control self-sealing type underground differential pressure sliding sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108343396A true CN108343396A (en) | 2018-07-31 |
| CN108343396B CN108343396B (en) | 2022-08-16 |
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|---|---|---|---|
| CN201810103681.2A Active CN108343396B (en) | 2018-02-01 | 2018-02-01 | Remote pressure control self-sealing type underground differential pressure sliding sleeve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472716A (en) * | 2020-04-22 | 2020-07-31 | 中国石油天然气集团有限公司 | Method for improving temporary plugging effect of wide natural cracks or artificial cracks |
| CN115110941A (en) * | 2022-06-23 | 2022-09-27 | 大庆宏测技术服务有限公司 | Sand blower for multi-layer fracturing |
| CN115324526A (en) * | 2022-07-25 | 2022-11-11 | 中国石油天然气集团有限公司 | Magnetic field mutation detection-based underground sliding sleeve system and control method thereof |
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|---|---|---|---|---|
| CN111472716A (en) * | 2020-04-22 | 2020-07-31 | 中国石油天然气集团有限公司 | Method for improving temporary plugging effect of wide natural cracks or artificial cracks |
| CN111472716B (en) * | 2020-04-22 | 2022-05-17 | 中国石油天然气集团有限公司 | Method for improving temporary plugging effect of wide natural cracks or artificial cracks |
| CN115110941A (en) * | 2022-06-23 | 2022-09-27 | 大庆宏测技术服务有限公司 | Sand blower for multi-layer fracturing |
| CN115110941B (en) * | 2022-06-23 | 2023-06-20 | 大庆宏测技术服务有限公司 | Sand blaster for multi-layer fracturing |
| CN115324526A (en) * | 2022-07-25 | 2022-11-11 | 中国石油天然气集团有限公司 | Magnetic field mutation detection-based underground sliding sleeve system and control method thereof |
| CN115324526B (en) * | 2022-07-25 | 2024-02-09 | 中国石油天然气集团有限公司 | Underground sliding sleeve system based on magnetic field mutation detection and control method thereof |
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| CN108343396B (en) | 2022-08-16 |
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