CN107165603A - A kind of oil field layered priming device - Google Patents
A kind of oil field layered priming device Download PDFInfo
- Publication number
- CN107165603A CN107165603A CN201710543431.6A CN201710543431A CN107165603A CN 107165603 A CN107165603 A CN 107165603A CN 201710543431 A CN201710543431 A CN 201710543431A CN 107165603 A CN107165603 A CN 107165603A
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- Prior art keywords
- change
- track
- central tube
- pressure switch
- single current
- Prior art date
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- 230000037452 priming Effects 0.000 title claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- 238000009825 accumulation Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 9
- 230000005764 inhibitory process Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009429 distress Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Filling, Topping-Up Batteries (AREA)
- Extraction Or Liquid Replacement (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The present invention relates to a kind of oil field layered priming device, its technical scheme is：Connected between top connection and lower contact by central tube, sealing piston, constant pressure switch, single current slipway, change pressure cap, change component movement body, constant pressure switch is provided between sealing piston and central tube, constant pressure switch bottom connects single current slipway, the bottom of single current slipway is change, the top of change is connected by change pressure cap, change is rotated around central tube, the bottom of movable body is provided with accumulating mechanism, accumulating mechanism bottom connects energy-accumulation pad, energy-accumulation pad bottom connects pressure regulation ring, described pressure regulation ring is connected by shop bolt with seal cylinder sleeve, the inside middle of central tube is provided with track；The beneficial effects of the invention are as follows：Technique is simple, it is not necessary to transfer multilayer pipe string, and dispensing clearly, is suppressed from the top down, lower to the water filling layer needed, realizes that multilayer connects water filling, underground water-injection operation is adjustable, can close, and realizes seperated layer water injection, while note can be closed.
Description
Technical field
The present invention relates to a kind of oil recovery equipment, more particularly to a kind of oil field layered priming device.
Background technology
In oilfield production, multilayer position is a common phenomenon, and in numerous layer positions, the profit content of liquid is not
With, in order to increase the benefit, it is necessary to which the mode such as cement injecting, water shutoff agent, chemical water shutoff blocks water layer in the production in oil field, open
Producing horizon, to improve tar productivity, reduces expense, increases benefit.Also there is mechanical delamination device in later stage, but it is the problem of exist
It is：Instrument can not realize commutation.Dispensing situation in current oil well is that one is to use eccentric injection mandrel, using eccentric injection mandrel
Need to quantify, underground water-injection operation is non-adjustable, it is impossible to close, it is impossible to inject different liquid；Two be using layering grafting injection
Method, advantage is can to reach the purpose of dispensing, can inject different liquid, and simultaneous to have the disadvantage, complex process is lower more
Layer tubing string, operating difficulties, it is impossible to realize that more than two layers of conjunction is noted.
The content of the invention
The drawbacks described above that the purpose of the present invention is present aiming at prior art there is provided a kind of oil field layered priming device,
Technique is simple, it is not necessary to transfer multilayer pipe string, and dispensing is clear and definite.
A kind of oil field layered priming device that the present invention is mentioned, its technical scheme is：Including top connection, central tube, sealing
Piston, constant pressure switch, single current slipway, seal cylinder sleeve, conversion pressure cap, change, track pin, accumulating mechanism, energy-accumulation pad, pressure
Regulation ring, shop bolt, lower contact, are connected between top connection and lower contact by central tube, the outside of top connection and lower contact
It is sequentially provided with sealing piston, constant pressure switch, single current slideway from top to bottom provided with seal cylinder sleeve, between central tube and seal cylinder sleeve
Body, change pressure cap, change, sealing piston, constant pressure switch, single current slipway, change pressure cap, change component movement body, sealing are lived
Constant pressure switch is provided between plug and central tube, constant pressure switch bottom connects single current slipway, and the bottom of single current slipway is change,
The top of change is connected by change pressure cap, and change is rotated around central tube, and the bottom of movable body is provided with accumulating mechanism, accumulating mechanism
Bottom connects energy-accumulation pad, and energy-accumulation pad bottom connection pressure regulation ring, described pressure regulation ring passes through shop bolt and sealing cylinder
Set connection, the inside middle of central tube is provided with track, and liquid applies pressure by sealing piston, constant pressure switch, single current slipway,
Moved by track pin in track, realize the rotation commutation of change.
Above-mentioned central tube top is provided with injection orifice, and described track includes long track and short track, and track pin edge is long
Track and short track are moved back and forth, wherein, the top dead-centre of long track is made up of long prescribe with short point interval of closing；Described short track
Bottom dead centre be made up of length identical reversal point interval.
Above-mentioned single current slipway includes sliding way body and glide path body, and the outside of sliding way body is provided with sealed groove, on
The diameter of slipway is less than the diameter of glide path body, and the external connections of sliding way body and glide path body are provided with convex shoulder, described
The internal connection of sliding way body and glide path body is provided with gear platform.
Above-mentioned accumulating mechanism is spring or rubber or air bag.
Above-mentioned constant pressure switch includes spring and piston, and the inside of piston is installed spring, set by the length for adjusting spring
Fixed different level pressure value.
Above-mentioned top connection is fixedly connected with central tube by check pin, prevents central tube axial rotation at work.
A kind of electrolyte filling method for oil field layered priming device that the present invention is mentioned, including following steps：
A）Central tube is connected through a screw thread to the external connection seal cylinder sleeve of top connection and lower contact, top connection and lower contact, it is close
Sealed between envelope cylinder sleeve and top connection and lower contact by seal washer；
B）Liquid is injected from top connection, liquid is moved downward in the presence of constant pressure switch by injection orifice, passes through single current slideway
Body, track pin enters on short track, and liquid, which is pressed on short track, carries out fluid injection or fracturing work, when overhead-liquid distress resolves
Afterwards, up so as to commutate in the presence of the accumulating mechanism of bottom, track pin enters in long track, realizes and closes on long track
Close；When track pin is in short track, due to the inhibition of track pin, so that movable body just moves to suitable position
Put and realize that constant pressure switch is opened, so as to complete the fluid injections such as water filling, acid filling or polymer injection work；
C）One level pressure value can be set according to the requirement of different wells, when track pin is in long track, the stroke of sealing piston
More than the injection orifice on central tube, injection orifice is not switched on, and realizes injection bore closure；When track pin is in short track, due to
The inhibition of track pin, so that movable body just moves to suitable position and realizes that constant pressure switch is opened, due to layering
The difference of combination, it is possible to achieve individual layer list is noted and how laminated note.
The beneficial effects of the invention are as follows：The present invention by sealing piston, constant pressure switch, single current slipway, change pressure cap, turn
Ring group is into the movable body of whole device, movable body being total to due to fluid pressure and accumulating mechanism between central tube and seal cylinder sleeve
Same-action is moved back and forth, and because the track length on central tube is different, the landing-switch of expression is also different, so the instrument can
The constant pressure switch completed in the function of seperated layer water injection and pressure break, movable body can set a level pressure according to the requirement of different wells
Value, when track pin is in long track, the stroke of sealing piston exceedes the injection orifice on central tube, is not switched on, therefore injection
Hole, which is realized, to be closed；When track pin is in short track, due to the inhibition of track pin, so that movable body is just moved to
Suitable position realizes that constant pressure switch is opened, so that completing fluid injection includes water filling, acid filling or polymer injection etc., works as distress resolves
When, movable body is up in the presence of accumulating mechanism, so as to commutate；
The device and technique of the present invention is simple, it is not necessary to transfer multilayer pipe string, and dispensing clearly, is suppressed from the top down, lower to needs
Water filling layer, realize multilayer connect water filling, underground water-injection operation is adjustable, can close, realize seperated layer water injection, while can close
Note.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the top half of the present invention；
Accompanying drawing 2 is the structural representation of the latter half of the present invention；
Accompanying drawing 3 is the structural representation of central tube；
Accompanying drawing 4 is the structural representation of single current slipway；
In upper figure：Joint 1, central tube 2, check pin 3, sealing piston 4, constant pressure switch 5, single current slipway 6, seal cylinder sleeve 7,
Change pressure cap 8, change 9, track pin 10, accumulating mechanism 11, energy-accumulation pad 12, pressure regulation ring 13, shop bolt 14, lower contact
15；Injection orifice 2.1, sliding way body 6.1, glide path body 6.2, sealed groove 6.3, gear platform 6.4, convex shoulder 6.5, length prescribe a, short pass
Point b, track c, long track d, short track e, reversal point f.
Embodiment
With reference to accompanying drawing 1-4, the invention will be further described：
Embodiment 1：A kind of oil field layered priming device that the present invention is mentioned, including it is top connection 1, central tube 2, sealing piston 4, fixed
Compress switch 5, single current slipway 6, seal cylinder sleeve 7, conversion pressure cap 8, change 9, track pin 10, accumulating mechanism 11, energy-accumulation pad 12,
Pressure regulation ring 13, shop bolt 14, lower contact 15, are connected, top connection between top connection 1 and lower contact 15 by central tube 2
1 and lower contact 15 outside be provided with seal cylinder sleeve 7, be sequentially provided with sealing piston from top to bottom between central tube 2 and seal cylinder sleeve 7
4th, constant pressure switch 5, single current slipway 6, change pressure cap 8, change 9, sealing piston 4, constant pressure switch 5, single current slipway 6, change
Pressure cap 8, the component movement body of change 9, are provided with constant pressure switch 5 between sealing piston 4 and central tube 2, the connection of the bottom of constant pressure switch 5 is single
Slipway 6 is flowed, the bottom of single current slipway 6 is change 9, and the top of change 9 is connected by change pressure cap 8, and change 9 is around central tube
2 rotate, and the bottom of movable body is provided with accumulating mechanism 11, the bottom of accumulating mechanism 11 connection energy-accumulation pad 12, the connection of the bottom of energy-accumulation pad 12
Pressure regulation ring 13, described pressure regulation ring 13 is connected by shop bolt 14 with seal cylinder sleeve 7, in the centre of central tube 2
Portion is provided with track c, and liquid applies pressure by sealing piston 4, constant pressure switch 5, single current slipway 6, existed by track pin 10
Moved in track c, realize the rotation commutation of change.
Wherein, the top of central tube 2 is provided with injection orifice 2.1, and described track c includes long track d and short track e, track pin
Nail 10 is moved back and forth along long track d and short track e, wherein, long track d top dead-centre prescribes a and short pass point b intervals group by length
Into；Described short track e bottom dead centre is made up of length identical reversal point f intervals.
Single current slipway 6 includes sliding way body 6.1 and glide path body 6.2, and the outside of sliding way body 6.1 is provided with sealed groove
6.3, the diameter of sliding way body 6.1 is less than the external connection of the diameter of glide path body 6.2, sliding way body 6.1 and glide path body 6.2
Place is provided with convex shoulder 6.5, and described sliding way body 6.1 and the internal connection of glide path body 6.2 are provided with gear platform 6.4.
Wherein, accumulating mechanism 11 is spring or rubber or air bag；Constant pressure switch 5 includes spring and piston, the inside of piston
Spring is installed, different level pressure values are set by the length for adjusting spring；In addition, top connection 1 and central tube 2 pass through check pin
3 are fixedly connected, and prevent central tube axial rotation at work.
A kind of electrolyte filling method for oil field layered priming device that the present invention is mentioned, including following steps：
A）Central tube 2 is connected through a screw thread to the external connection sealing of top connection 1 and lower contact 15, top connection 1 and lower contact 15
Cylinder sleeve 7, is sealed between seal cylinder sleeve 7 and top connection 1 and lower contact 15 by seal washer；
B）Liquid is injected from top connection 1, liquid is moved downward in the presence of constant pressure switch 5 by injection orifice 2.1, passes through single current
Slipway 6, track pin 10 enters on short track e, and liquid, which is pressed on short track e, carries out fluid injection or fracturing work, when top liquid
After body distress resolves, up so as to commutate in the presence of bottom accumulating mechanism 11, track pin 10 enters in long track d,
Realize and close on long track d；When track pin 10 is in short track e, due to the inhibition of track pin 10, so that motion
Body just moves to suitable position and realizes that constant pressure switch 5 is opened, so as to complete the fluid injection work such as water filling, acid filling or polymer injection
Make；
C）One level pressure value can be set according to the requirement of different wells, when track pin 10 is in long track d, sealing piston 4
Stroke exceedes the injection orifice 2.1 on central tube 2, and injection orifice 2.1 is not switched on, and realizes that injection orifice 2.1 is closed；When track pin 10
In short track e, due to the inhibition of track pin 10, so that movable body just moves to suitable position and realizes level pressure
Switch 5 is opened, due to the difference of layered combination, it is possible to achieve individual layer list is noted and how laminated note.
The present invention constitutes whole device by sealing piston 4, constant pressure switch 5, single current slipway 6, change pressure cap 8, change 9
Movable body, movable body is between central tube 2 and seal cylinder sleeve 7 because the collective effect of fluid pressure and accumulating mechanism is back and forth transported
Dynamic, because the track length on central tube 2 is different, the landing-switch of expression is also different, so the instrument can complete layering note
Constant pressure switch 5 in the function of water and pressure break, movable body can set a level pressure value according to the requirement of different wells, work as track pin
Nail 10 is in long track d, and the stroke of sealing piston 4 exceedes the injection orifice 2.1 on central tube 2, is not switched on, therefore injection orifice
2.1 realize closing；When track pin 10 is in short track e, due to the inhibition of track pin 10, so that movable body is just
Move to suitable position and realize that constant pressure switch 5 is opened, so that completing fluid injection includes water filling, acid filling or polymer injection etc., work as pressure
When power disappears, movable body is up in the presence of accumulating mechanism, so as to commutate.
Embodiment 2：As different from Example 1, constant pressure switch 5 is cancelled, opening up micro-constant in sealing piston 4 presses off
Close, miniature constant pressure switch is set on single current slipway, at the top of sealing piston provided with fluting, fluting is internal to be provided with spring and rolling
Pearl, the bottom of single current slipway opens up guiding gutter, and guiding gutter inside is realized provided with spring with ball to be connected, so as to realize fluid injection
Function.
It is described above, only it is the part preferred embodiment of the present invention, any those skilled in the art may profit
Equivalent technical scheme is changed or is revised as with the technical scheme of above-mentioned elaboration.Therefore, the technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (4)
1. a kind of oil field layered priming device, it is characterized in that：Including top connection（1）, central tube（2）, sealing piston（4）, level pressure
Switch（5）, single current slipway（6）, seal cylinder sleeve（7）, conversion pressure cap（8）, change（9）, track pin（10）, accumulating mechanism
（11）, energy-accumulation pad（12）, pressure regulation ring（13）, shop bolt（14）, lower contact（15）, top connection（1）And lower contact（15）
Between pass through central tube（2）Connection, top connection（1）And lower contact（15）Outside be provided with seal cylinder sleeve（7）, central tube（2）With
Seal cylinder sleeve（7）Between be sequentially provided with sealing piston from top to bottom（4）, constant pressure switch（5）, single current slipway（6）, change pressure cap
（8）And change（9）, and sealing piston（4）, constant pressure switch（5）, single current slipway（6）, change pressure cap（8）And change（9）Composition
Movable body, sealing piston（4）With central tube（2）Between be provided with constant pressure switch（5）, constant pressure switch（5）Bottom connects single current slideway
Body（6）, single current slipway（6）Bottom be change（9）, change（9）Top pass through change pressure cap（8）Connection, change（9）Around
Central tube（2）Rotate, the bottom of movable body is provided with accumulating mechanism（11）, accumulating mechanism（11）Bottom connects energy-accumulation pad（12）, store
Can pad（12）Bottom connects pressure regulation ring（13）, described pressure regulation ring（13）Pass through shop bolt（14）With seal cylinder sleeve
（7）Connection, central tube（2）Inside middle be provided with track（c）, liquid passes through sealing piston（4）, constant pressure switch（5）, single current slide
Road body（6）Apply pressure, pass through track pin（10）In track（c）Middle motion, realizes change（9）Rotation commutation；
Described central tube（2）Top is provided with injection orifice（2.1）, described track（c）Including long track（d）With short track（e）,
Track pin（10）Along long track（d）With short track（e）Move back and forth, wherein, long track（d）Top dead-centre by length prescribe（a）
With short pass point（b）Interval composition；Described short track（e）Bottom dead centre by length identical reversal point（f）Interval composition.
2. a kind of oil field layered priming device according to claim 1, it is characterized in that：Described accumulating mechanism（11）For bullet
Spring or rubber or air bag.
3. a kind of oil field layered priming device according to claim 1, it is characterized in that：Described constant pressure switch（5）Including
Spring is installed in spring and piston, the inside of piston, and different level pressure values are set by the length for adjusting spring.
4. a kind of oil field layered priming device according to claim 1, it is characterized in that：Described top connection（1）And center
Pipe（2）Pass through check pin（3）It is fixedly connected, prevents central tube（2）Axial rotation at work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543431.6A CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510343063.1A CN104948156B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven layering fluid injection and fracturing device |
| CN201710543431.6A CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510343063.1A Division CN104948156B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven layering fluid injection and fracturing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165603A true CN107165603A (en) | 2017-09-15 |
| CN107165603B CN107165603B (en) | 2019-08-13 |
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ID=54163164
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710543431.6A Active CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
| CN201710542566.0A Active CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201510343063.1A Active CN104948156B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven layering fluid injection and fracturing device |
| CN201710543025.XA Active CN107339085B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven is layered the electrolyte filling method of fluid injection and fracturing device |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710542566.0A Active CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201510343063.1A Active CN104948156B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven layering fluid injection and fracturing device |
| CN201710543025.XA Active CN107339085B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven is layered the electrolyte filling method of fluid injection and fracturing device |
Country Status (1)
| Country | Link |
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| CN (4) | CN107165603B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667749A (en) * | 2018-11-21 | 2019-04-23 | 大连华科机械有限公司 | Gas well pressure takes out pump certainly |
| CN109707605A (en) * | 2018-11-21 | 2019-05-03 | 大连华科机械有限公司 | The improvement device pumped based on gas well pressure from pumping |
| CN111206904A (en) * | 2019-11-15 | 2020-05-29 | 王凯 | Hydraulic switch capable of automatically realizing reversing balance of oil sleeve pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035341B (en) * | 2017-06-14 | 2019-05-10 | 西南石油大学 | Exempt from the control of pitching pressure and realizes the sliding sleeve tool opened |
| CN107618885A (en) * | 2017-10-23 | 2018-01-23 | 中国石油化工股份有限公司中原油田分公司石油工程技术研究院 | The conveying device and carrying method of granular material |
| CN109113693A (en) * | 2018-09-28 | 2019-01-01 | 中国石油化工股份有限公司 | Hydraulic control changes layer water filling device and changes layer water injection string and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109667749A (en) * | 2018-11-21 | 2019-04-23 | 大连华科机械有限公司 | Gas well pressure takes out pump certainly |
| CN109707605A (en) * | 2018-11-21 | 2019-05-03 | 大连华科机械有限公司 | The improvement device pumped based on gas well pressure from pumping |
| CN111206904A (en) * | 2019-11-15 | 2020-05-29 | 王凯 | Hydraulic switch capable of automatically realizing reversing balance of oil sleeve pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165603B (en) | 2019-08-13 |
| CN107191166A (en) | 2017-09-22 |
| CN104948156A (en) | 2015-09-30 |
| CN107191166B (en) | 2020-06-09 |
| CN104948156B (en) | 2017-07-14 |
| CN107339085B (en) | 2019-09-24 |
| CN107339085A (en) | 2017-11-10 |
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