CN104948156B - A kind of full-bore hydraulic-driven layering fluid injection and fracturing device - Google Patents
A kind of full-bore hydraulic-driven layering fluid injection and fracturing device Download PDFInfo
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- CN104948156B CN104948156B CN201510343063.1A CN201510343063A CN104948156B CN 104948156 B CN104948156 B CN 104948156B CN 201510343063 A CN201510343063 A CN 201510343063A CN 104948156 B CN104948156 B CN 104948156B
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- constant pressure
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- 238000002347 injection Methods 0.000 title claims abstract description 47
- 239000007924 injection Substances 0.000 title claims abstract description 47
- 239000012530 fluid Substances 0.000 title claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000009825 accumulation Methods 0.000 claims abstract description 13
- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- 230000033001 locomotion Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 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
- 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
- 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
- 230000008034 disappearance Effects 0.000 description 1
- 230000009429 distress 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
- 238000003860 storage 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Filling, Topping-Up Batteries (AREA)
- Actuator (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The present invention relates to a kind of layering fluid injection of full-bore hydraulic-driven and fracturing 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 full-bore hydraulic-driven layering fluid injection and pressure break dress
Put.
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 purpose of the present invention is layered aiming at the drawbacks described above that prior art is present there is provided a kind of full-bore hydraulic-driven
Fluid injection and fracturing device, technique are simple, it is not necessary to transfer multilayer pipe string, and dispensing is clear and definite.
A kind of full-bore hydraulic-driven that the present invention is mentioned is layered fluid injection and fracturing device, and its technical scheme is：Including upper
Joint, central tube, sealing piston, constant pressure switch, single current slipway, seal cylinder sleeve, conversion pressure cap, change, track pin, accumulation of energy
Mechanism, energy-accumulation pad, pressure regulation ring, shop bolt, lower contact, are connected by central tube between top connection and lower contact, above connect
The outside of head and lower contact is provided with seal cylinder sleeve, is sequentially provided with sealing piston between central tube and seal cylinder sleeve from top to bottom, determines
Compress switch, single current slipway, change pressure cap, change, sealing piston, constant pressure switch, single current slipway, change pressure cap, change group
Into movable body, constant pressure switch, constant pressure switch bottom connection single current slipway, single current slideway are provided between sealing piston and central tube
The bottom of body is change, and 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 storage
Energy mechanism, accumulating mechanism bottom connection energy-accumulation pad, energy-accumulation pad bottom connection pressure regulation ring, it is fixed that described pressure regulation ring passes through
Position pin is connected with seal cylinder sleeve, and the inside middle of central tube is provided with track, and liquid passes through sealing piston, constant pressure switch, single current
Slipway applies pressure, is moved by track pin in track, realizes 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 layering fluid injection of full-bore hydraulic-driven and the electrolyte filling method of fracturing device that the present invention is mentioned, including it is following several
Individual step：
A）Central tube is connected through a screw thread to the external connection sealing cylinder of top connection and lower contact, top connection and lower contact
Set, is sealed between seal 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
Slipway, track pin enters on short track, and liquid, which is pressed on short track, carries out fluid injection or fracturing work, when overhead-liquid pressure
After disappearance, up so as to commutate in the presence of the accumulating mechanism of bottom, track pin enters in long track, is realized on long track
Close；When track pin is in short track, due to the inhibition of track pin, so that movable body is just moved to suitably
Position realizes 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, sealing piston
Stroke exceedes the injection orifice on central tube, and 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
The difference of layered 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, under arrive
The water filling layer needed, realizes that multilayer connects water filling, underground water-injection operation is adjustable, can close, realize seperated layer water injection, while can be with
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, sealing cylinder
Set 7, conversion pressure cap 8, change 9, track pin 10, accumulating mechanism 11, energy-accumulation pad 12, pressure regulation ring 13, shop bolt 14, under
Joint 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, it is long 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 layering fluid injection of full-bore hydraulic-driven and fracturing device that the present invention is mentioned, including top connection 1,
Central tube 2, sealing piston 4, constant 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, lead between top connection 1 and lower contact 15
Cross central tube 2 to connect, the outside of top connection 1 and lower contact 15 is provided with seal cylinder sleeve 7, by upper between central tube 2 and seal cylinder sleeve 7
Sealing piston 4, constant pressure switch 5, single current slipway 6, change pressure cap 8, change 9 are sequentially provided with downwards, sealing piston 4, level pressure are opened
5, single current slipway 6, change pressure cap 8, the component movement body of change 9 are closed, constant pressure switch is provided between sealing piston 4 and central tube 2
5, the bottom of constant pressure switch 5 connection single current slipway 6, the bottom of single current slipway 6 is change 9, and the top of change 9 passes through change pressure
Cap 8 is connected, and change 9 is rotated around central tube 2, and the bottom of movable body is provided with accumulating mechanism 11, the connection accumulation of energy of the bottom of accumulating mechanism 11
Pad 12, the bottom of energy-accumulation pad 12 connection pressure regulation ring 13, described pressure regulation ring 13 passes through shop bolt 14 and seal cylinder sleeve 7
Connection, the inside middle of central tube 2 is provided with track c, and liquid applies pressure by sealing piston 4, constant pressure switch 5, single current slipway 6
Power, is moved by track pin 10 in track c, realizes 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 layering fluid injection of full-bore hydraulic-driven and the electrolyte filling method of fracturing device that the present invention is mentioned, including it is following several
Individual step：
A）Central tube 2 is connected through a screw thread to the external connection of top connection 1 and lower contact 15, top connection 1 and lower contact 15
Seal 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 by injection orifice 2.1 in the presence of constant pressure switch 5, passed 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, works as top
After portion's fluid pressure disappears, up so as to commutate in the presence of bottom accumulating mechanism 11, track pin 10 enters long track d
It is interior, 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
Movable body is just moved to suitable position and realize that constant pressure switch 5 is opened, so as to complete the note such as water filling, acid filling or polymer injection
Liquid works；
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；Work as track pin
Nail 10 is in short track e, due to the inhibition of track pin 10, so that movable body just moves to suitable position and realized
Constant 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, which to be opened up, connected inside guiding gutter, guiding gutter provided with spring with ball realization, so as to realize fluid injection
Function.
The above, is only the part preferred embodiment of the present invention, and any those of ordinary skill 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 full-bore hydraulic-driven layering fluid injection and fracturing device, it is characterized in that：Including top connection（1）, central tube（2）、
Sealing piston（4）, constant pressure switch（5）, single current slipway（6）, seal cylinder sleeve（7）, conversion pressure cap（8）, change（9）, track pin
Nail（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）And seal cylinder sleeve（7）Between be sequentially provided with sealing piston from top to bottom（4）, constant pressure switch（5）, single current slide
Road body（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）Component movement body, sealing piston（4）With central tube（2）Between be provided with constant pressure switch（5）, constant pressure switch（5）
Bottom connects single current slipway（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
Connect energy-accumulation pad（12）, energy-accumulation pad（12）Bottom connects pressure regulation ring（13）, described pressure regulation ring（13）Pass through positioning
Pin（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 slipway（6）Apply pressure, pass through track pin（10）In track（c）Middle motion, realizes change（9）
Rotation commutation.
2. a kind of full-bore hydraulic-driven layering fluid injection according to claim 1 and fracturing device, it is characterized in that：Described
Accumulating mechanism（11）For spring or rubber or air bag.
3. a kind of full-bore hydraulic-driven layering fluid injection according to claim 1 and fracturing device, it is characterized in that：Described
Constant pressure switch（5）Including spring and piston, spring is installed in the inside of piston, and different level pressure are set by the length for adjusting spring
Value.
4. a kind of full-bore hydraulic-driven layering fluid injection according to claim 1 and fracturing device, it is characterized in that：Described
Top connection（1）And central tube（2）Pass through check pin（3）It is fixedly connected, prevents central tube（2）Axial rotation at work.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710542566.0A CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201510343063.1A CN104948156B (en) | 2015-06-19 | 2015-06-19 | A kind of full-bore hydraulic-driven layering fluid injection and fracturing device |
| CN201710543025.XA 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 |
| CN201710543431.6A CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
Applications Claiming Priority (1)
| 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 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710543025.XA Division 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 |
| CN201710542566.0A Division CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201710543431.6A Division CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
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| Publication Number | Publication Date |
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| CN104948156A CN104948156A (en) | 2015-09-30 |
| CN104948156B true CN104948156B (en) | 2017-07-14 |
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| 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 |
| CN201710542566.0A Active CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201710543431.6A Active CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
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| CN201710542566.0A Active CN107191166B (en) | 2015-06-19 | 2015-06-19 | Equipment for oil extraction in oil field |
| CN201710543431.6A Active CN107165603B (en) | 2015-06-19 | 2015-06-19 | A kind of oil field layered priming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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***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 |
| CN109707605B (en) * | 2018-11-21 | 2020-04-24 | 大连华科机械有限公司 | Improved device based on gas well pressure self-pumping pump |
| CN109667749B (en) * | 2018-11-21 | 2020-04-10 | 大连华科机械有限公司 | Gas well pressure self-pumping pump |
| 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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Also Published As
| Publication number | Publication date |
|---|---|
| CN107165603B (en) | 2019-08-13 |
| CN104948156A (en) | 2015-09-30 |
| CN107191166A (en) | 2017-09-22 |
| CN107165603A (en) | 2017-09-15 |
| CN107339085A (en) | 2017-11-10 |
| CN107339085B (en) | 2019-09-24 |
| CN107191166B (en) | 2020-06-09 |
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