CN106988707A - Double coal seam four-way packer layered pressure controls combine mining device and method - Google Patents

Double coal seam four-way packer layered pressure controls combine mining device and method Download PDF

Info

Publication number
CN106988707A
CN106988707A CN201710227604.3A CN201710227604A CN106988707A CN 106988707 A CN106988707 A CN 106988707A CN 201710227604 A CN201710227604 A CN 201710227604A CN 106988707 A CN106988707 A CN 106988707A
Authority
CN
China
Prior art keywords
coal seam
packer
liquid
mining
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710227604.3A
Other languages
Chinese (zh)
Other versions
CN106988707B (en
Inventor
李彬刚
万志杰
高腾飞
范耀
庞涛
刘嘉
巫修平
张东亮
何国龙
史小平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Research Institute Co Ltd of CCTEG
Original Assignee
Xian Research Institute Co Ltd of CCTEG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Research Institute Co Ltd of CCTEG filed Critical Xian Research Institute Co Ltd of CCTEG
Priority to CN201710227604.3A priority Critical patent/CN106988707B/en
Publication of CN106988707A publication Critical patent/CN106988707A/en
Application granted granted Critical
Publication of CN106988707B publication Critical patent/CN106988707B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14Obtaining from a multiple-zone well

Abstract

The present invention relates to a kind of mining device and method, belong to cbm development technical field, and in particular to a kind of pair of coal seam four-way packer layered pressure control joint mining device and method.The present invention is by two coal seam packings in different pressure systems, upper coal seam crosses liquid channel upper and was connected with liquid pipe, certain liquid depth can be kept, even if pit shaft liquid level is reduced to below superjacent, superjacent is not resulted in exposed, so as in the case where ensureing the optimal aerogenesis effect of underlying seam, can still ensure the optimal aerogenesis effect of superjacent yet, reservoir damage is reduced, the interlayer interference during the mining of double coal seams is reduced.

Description

Double coal seam four-way packer layered pressure controls combine mining device and method
Technical field
The present invention relates to a kind of mining device and method, belong to cbm development technical field, and in particular to a kind of coal seam The double coal seam four-way packer layered pressure control joint mining device and methods of gas well.
Background technology
Double coal seam cbm development straight wells are more by the way of layer mining is closed at this stage, because double coal seams have two pressure controls The aerogenesis phase, into after pressure control stable production period, if the aerogenesis effect in order to ensure superjacent, serious sluggish underlying seam gas is entered Enter the time of pressure control aerogenesis phase, similarly, in order to ensure the aerogenesis effect of underlying seam, level certainly will drop to superjacent it Under, so that superjacent be exposed.How to control the reservoir pressure of two layers of coal simultaneously by mining technique, reduce reservoir damage, The aerogenesis effect for ensureing two coal seams simultaneously is the technical barrier of the double coal seam minings of coal bed gas well.
A kind of " double-jacket tube list pump layering control pressing layer mining technology and the device " of Patent No. 201310446063.5 is carried A kind of double coal seam layering discharge and mining methods of coal bed gas well are supplied, its double-jacket tube operation technique is complicated, cost is high.
Therefore, in view of drawbacks described above, designer of the invention is by concentrating on studies and designing, comprehensive long campaigns correlation production The experience and achievement of industry, the double coal seam four-way packer layered pressure control joint mining devices of research and design coal output layer gas well and side Method, to overcome drawbacks described above.
The content of the invention
It is an object of the invention to provide the double coal seam four-way packer layered pressure control joint mining devices of coal bed gas well and side Two coal seam sections are separated by method in pit shaft, are prevented effectively from double coal seam exploitation straight wells and are closed the complicated layer produced during layer mining Between interference effect, solve the problems, such as double coal seams mining layering pressure controls, improve gas well deliverability.
To solve the above problems, according to an aspect of the invention, there is provided a kind of pair of coal seam four-way packer layered Pressure control combines mining device, including:
Packer, is provided with main product liquid passage, lower coal seam aerogenesis passage, upper coal seam and crosses liquid passage, and pass through master Production liquid passage is fixed on oil pipe;
Lower coal seam generating tube, is connected with lower coal seam aerogenesis passage, for the gas in lower coal seam to be exported;
Liquid pipe is crossed in upper coal seam, and its lower end is crossed liquid passage with upper coal seam and is connected, and upper end is located at the optimal aerogenesis effect of superjacent When liquid level position, the liquid level for coal seam above and below UNICOM.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control joint mining device, in addition to upper end are logical Cross coal seam and cross liquid passage and upper coal seam and cross the discharging tube that liquid passage is connected, the lower end of the discharging tube is located in lower coal seam.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control joint mining device, the bottom of the oil pipe Portion is sequentially connected pump barrel, screen casing, sand sediment pipe, and the sucker rod of connection plunger is provided with it.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control combines mining device, the pump barrel and oil The connected one end of pipe is provided with moving valve, and the one end being connected with screen casing is provided with standing valve.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control joint mining device, in addition to pass through four The cable passage of passage packer is connected and sealed pressure gauge cable with pressure bomb.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control joint mining device, the upper coal seam mistake Liquid level is apart from sum when liquid pipe length is superjacent optimal to superjacent to packer distance and packer aerogenesis effect.
Optimization, a kind of pair of above-mentioned coal seam four-way packer layered pressure control joint mining device, the lower coal seam production Air tubing length crosses liquid pipe length more than upper coal seam.
In order to solve the above problems, there is provided a kind of pair of coal seam four-way packer point according to another aspect of the present invention Layer pressure control joint discharge and mining method, includes following step:
Step 1: reservoir pressure when calculating the optimal aerogenesis effect in top and the bottom coal seam, and pressure value is converted into fluid column Highly;
Step 2: packer is connected on oil pipe, packer location is between two coal seams and avoids collar;Will Upper coal seam on packer, which crosses liquid passage upper end and crosses liquid pipe with upper coal seam, to be connected, and lower end is connected with discharging tube;By on packer Lower coal seam aerogenesis channel upper be connected with lower coal seam generating tube;By pressure gauge cable by the cable passage on packer after It is fixed on the pressure gauge pipe nipple on screen casing top and seals;
Step 3: by after tubing string+packer tripping in projected depth, set packer is suppressed by well head;
Step 4: installing well head, start normal extraction program, monitoring pressure in real time is counted, when liquid level was down to Adjustment Liquid output in time behind liquid pipe top, it is ensured that reservoir pressure when pressure gauge reading stable and continuous is down to the optimal aerogenesis effect in lower coal seam Power, carries out voltage stabilizing mining by adjusting jig frequency afterwards.
By the above, the present invention has advantages below:
(1) by two coal seam packings in two different pressure systems, upper coal seam crosses liquid channel upper and was connected with liquid pipe, Certain liquid depth can be kept, even if pit shaft liquid level is reduced to below superjacent, it is exposed also not result in superjacent, so that In the case of ensureing underlying seam aerogenesis, superjacent aerogenesis can be still ensured, reservoir damage is reduced, double coal seams mining is reduced During interlayer interference;
(2) can effectively it solve the problem of packer is subjected to displacement caused by there is pressure oscillation underground and coal seam coal dust deposition And husky problem is told, reduce the probability of down-hole accident generation.
Brief description of the drawings
Fig. 1 is the principle schematic of the present invention;
Fig. 2 is four-way packer profile;
In Fig. 1:1. sucker rod, 2. oil pipes, 3. sleeve pipes, 4. pressure gauge cables, liquid pipe, 6. times coal seam aerogenesis are crossed in coal seam on 5. Pipe, 7. superjacents, 8. four-way packers, 9. underlying seams, 10. plungers, 11. moving valves, 12. pump barrels, 13. standing valves, 14. pressure gauge, 15. screen casings, 16. desilting pipes, coal seam is crossed liquid passage, 18. times coal seam aerogenesis passages, 19. main product liquid and led on 17. Cable passage, 21. discharging tubes, 22. telescoping tubes, 23. safety joints, 24. circulating valves are crossed in road, 20..
Embodiment
Referring to Fig. 1-2, it is shown that a kind of double coal seam four-way packer layered pressure control joint rows of coal bed gas well of the invention Device for picking, it includes flow string 2,12,15,16, four-way packer 8, pressure gauge cable 4, lower coal seam generating tube 6, upper coal Layer crosses liquid pipe 5, it is characterised in that:
The flow string includes oil pipe 2, pump barrel 12, screen casing 15, sand sediment pipe 16, and other kinds of flow string also may be selected Post, such as fluid power Rodless oil extraction tubing string, jet pump tubing string and hydraulic piston pump tubing string.
Described four-way packer 8 is connected by the screw thread up and down of main product liquid passage 19 with flow string 2.
Wherein, the four-way packer 8 include parallel arrangement of main product liquid passage 19, lower coal seam aerogenesis passage 18, on Coal seam crosses liquid passage 17 and crosses cable passage 20.
Wherein, the packer 5 is suppressed by flow string 2 by ground high-pressure pump sets, unseals, and sets, unseals principle Similar to Y344 type packers.
The pressure gauge cable 4 is connected and close by the cable passage 20 of crossing of four-way packer 8 with pressure bomb 14 Envelope.
Wherein, the cable passage 20 of crossing is sealed with pressure gauge cable 4 by packing nut and packing, can also be passed through The other modes such as glass cement are sealed.
The reserved screw thread phase for the lower upper end of coal seam aerogenesis passage 18 that the lower coal seam generating tube 6 passes through four-way packer 8 Connection, can also lead to provided pipe crimping etc. other connected modes be connected.
Wherein, the length of lower coal seam generating tube 6 crosses the length of liquid pipe 5 more than upper coal seam, and is fixed on oil with centralizer or steel band On tubing string 2, keep being relatively fixed with tubing string 2.
The reserved screw thread phase that liquid pipe 5 crosses the upper end of liquid passage 17 by the upper coal seam of four-way packer 8 is crossed in the upper coal seam Connection, can also lead to provided pipe crimping etc. other connected modes be connected.
Wherein, the upper coal seam crosses the length of liquid pipe 5 and arrives packer 8 apart from the+optimal aerogenesis of superjacent 7 for superjacent 7 Liquid level during effect, and be fixed on centralizer or steel band on tubing string 2, keep being relatively fixed with tubing string 2.
Combine mining device, double coal seam four-ways of the invention by above-mentioned double coal seam four-way packer layered pressure controls Packer layered pressure control combines discharge and mining method, includes following step:
Step 1: when calculating top and the bottom coal seam 7,9 optimal aerogenesis effect by numerical simulation or early stage mining data Reservoir pressure, is converted into liquid-column height a and b;
Step 2: four-way packer 8 is connected on oil pipe 2, the top connected pipes 2+ telescoping tubes of main product liquid passage 19 22+ safety joint 23+ circulating valves 24, bottom connected pipes 2+ pump barrel 12+ screen casing 15+ desiltings pipe 16, the position of packer 8 is in two Between coal seam 7,9 and avoid collar;Upper coal seam is crossed the upper end of liquid passage 17 and is connected with crossing liquid pipe 5, crosses liquid pipe 5 and passes through righting Device or steel band are fixed on oil pipe 2, are crossed liquid level a+ packers when liquid pipe 5 length is the optimal aerogenesis effect of superjacent 7 and are arrived Upper coal seam distance, upper coal seam is crossed the lower end of liquid passage 17 and is connected with discharging tube 21, and discharging tube 21 is fixed by centralizer or steel band On oil pipe 2, liquid level height when the length of discharging tube 21 is more than underlying seam optimal to packer distance-underlying seam aerogenesis effect Spend b;The lower top of coal seam aerogenesis passage 18 is connected with lower coal seam generating tube 6, and lower coal seam generating tube 6 is solid by centralizer or steel band It is scheduled on oil pipe 2, its length was more than 2-3 meters of liquid pipe, ground can also be extended directly to and measured;Pressure gauge cable 4 leads to Be fixed on the pressure gauge pipe nipple on the top of screen casing 15 after cable passage 20, and sealed the upper and lower opening of cable passage 20.
Step 3: by after the tripping in projected depth of tubing string+packer 8, set packer 8 is suppressed by well head;
Step 4: installing well head, start normal extraction program, the data of monitoring pressure in real time meter 14, when liquid level is down to Superjacent is crossed adjusts Liquid output in time behind the top of liquid pipe 5, it is ensured that pressure gauge reading stable and continuous is down to the optimal aerogenesis in lower coal seam 9 Reservoir pressure during effect, carries out voltage stabilizing mining by adjusting jig frequency afterwards.
After said structure and method, the present invention insulates in two coal seams in different pressure systems, upper coal seam mistake Liquid channel upper was connected with liquid pipe, can keep certain liquid depth, even if pit shaft liquid level is reduced to below superjacent, also not Superjacent can be caused exposed, so as in the case of ensureing underlying seam aerogenesis, can still ensure superjacent aerogenesis, reduce storage Layer injury, reduces the interlayer interference during the mining of double coal seams.
Also, in the present embodiment, telescoping tube 22 is provided with oil pipe 2.If there is pressure oscillation underground, packing is applied to On device 8, packer 8 can be caused to be subjected to displacement, telescoping tube 22 can efficiently solve this problem;In the present embodiment, on oil pipe 2 It is in order to avoid because superjacent tells sand in process of production or tells coal dust, being deposited on packer, make to set circulating valve 24 It can not be risen out into the solution of packer 8 tubing string of being honored as a queen.Now deposit can be returned out by well head by the well-flushing of circulating valve 24, so that will pipe Post rises;If rising still to be obstructed by tubing string after clean-out service, it is impossible to normal to rise, now can upper lifting pipe post until safety Joint 23 sets pulling force, and safety joint 23 is realized and given up, and instrument of the safety joint below 23 stayed in into underground, safety joint 23 with Upper tubing string can smoothly rise out, then be salvaged or bored milling by remaining tubing string and instrument, reduce the probability of down-hole accident generation simultaneously Give processing scheme.
It is readily apparent that the description and record of the above are only illustrated in the disclosure being not intended to be limiting of the invention Hold, using or use.Although being described in embodiment and embodiment being described in the drawings, the present invention is not limited By accompanying drawing example and described in embodiment as it is now recognized that optimal mode to implement the particular case of the teachings of the present invention Son, the scope of the present invention is by any embodiment including falling into description and appended claims above.

Claims (8)

1. a kind of pair of coal seam four-way packer layered pressure control joint mining device, it is characterised in that including:
Packer (8), is provided with main product liquid passage (19), lower coal seam aerogenesis passage (18), upper coal seam and crosses liquid passage (17), And it is fixed on by main product liquid passage (19) on oil pipe (2);
Lower coal seam generating tube (6), is connected with lower coal seam aerogenesis passage (18), for the gas in lower coal seam to be exported;
Liquid pipe (5) is crossed in upper coal seam, and its lower end is crossed liquid passage (17) with upper coal seam and is connected, and upper end is located at the optimal aerogenesis effect of superjacent Liquid level position during fruit, the liquid level for coal seam above and below UNICOM.
2. a kind of pair of coal seam four-way packer layered pressure control according to claim 1 combines mining device, its feature exists In, in addition to upper end crosses liquid passage (17) with upper coal seam by upper coal seam and crosses the discharging tube (21) that liquid passage (17) is connected, it is described The lower end of discharging tube (21) is located in lower coal seam.
3. a kind of pair of coal seam four-way packer layered pressure control according to claim 1 combines mining device, its feature exists In the bottom of the oil pipe (2) is sequentially connected pump barrel (12), screen casing (15), sand sediment pipe (16), is provided with connection plunger in it (10) sucker rod (1).
4. a kind of pair of coal seam four-way packer layered pressure control according to claim 2 combines mining device, its feature exists In the pump barrel (12) is provided with moving valve (11) with one end that oil pipe (2) is connected, and the one end being connected with screen casing (15) is provided with Standing valve (13).
5. a kind of pair of coal seam four-way packer layered pressure control according to claim 1 combines mining device, its feature exists In, in addition to cable passage (20) by four-way packer (8) is connected and sealed pressure gauge with pressure bomb (14) Cable (4).
6. a kind of pair of coal seam four-way packer layered pressure control according to claim 1 combines mining device, its feature exists In the upper coal seam crosses liquid pipe (5) length and arrives superjacent with packer (8) for superjacent (7) to packer (8) distance (7) during optimal aerogenesis effect liquid level apart from sum.
7. a kind of pair of coal seam four-way packer layered pressure control according to claim 1 combines mining device, its feature exists In lower coal seam generating tube (6) length crosses liquid pipe (5) length more than upper coal seam.
8. a kind of pair of coal seam four-way packer layered pressure control joint discharge and mining method, it is characterised in that include following step:
Step 1: reservoir pressure when calculating superjacent and the optimal aerogenesis effect of underlying seam, and pressure value is converted into Liquid-column height;
Step 2: packer is connected on oil pipe, packer location is between two coal seams and avoids collar;Will packing Upper coal seam on device, which crosses liquid passage upper end and crosses liquid pipe with upper coal seam, to be connected, and lower end is connected with discharging tube;Under on packer Coal seam aerogenesis channel upper is connected with lower coal seam generating tube;Pressure gauge cable is passed through fixed after the cable passage on packer On the pressure gauge pipe nipple on screen casing top and seal;
Step 3: by after tubing string+packer tripping in projected depth, set packer is suppressed by well head;
Step 4: installing well head, start normal extraction program, monitoring pressure in real time is counted, when liquid level was down to liquid pipe Adjustment Liquid output in time behind top, it is ensured that reservoir pressure when pressure gauge reading stable and continuous is down to the optimal aerogenesis effect in lower coal seam, Afterwards voltage stabilizing mining is carried out by adjusting jig frequency.
CN201710227604.3A 2017-04-10 2017-04-10 Layered pressure control combined drainage and mining device and method for double-coal-bed four-channel packer Active CN106988707B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710227604.3A CN106988707B (en) 2017-04-10 2017-04-10 Layered pressure control combined drainage and mining device and method for double-coal-bed four-channel packer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710227604.3A CN106988707B (en) 2017-04-10 2017-04-10 Layered pressure control combined drainage and mining device and method for double-coal-bed four-channel packer

Publications (2)

Publication Number Publication Date
CN106988707A true CN106988707A (en) 2017-07-28
CN106988707B CN106988707B (en) 2019-12-17

Family

ID=59415015

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710227604.3A Active CN106988707B (en) 2017-04-10 2017-04-10 Layered pressure control combined drainage and mining device and method for double-coal-bed four-channel packer

Country Status (1)

Country Link
CN (1) CN106988707B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU447515A1 (en) * 1972-05-05 1974-10-25 Ордена Трудового Красного Знамени Институт Горного Дела Им.А.А.Скочинского The way to deal with dust and gas in coal mines
CN102434135A (en) * 2011-12-02 2012-05-02 河南理工大学 Multi-layer discharge and mining device for multiple seam developed area
CN103061724A (en) * 2013-01-21 2013-04-24 中煤科工集团西安研究院 Layered pressure control combined drainage-production device for double coal-beds prone to dust and sand spraying
CN103527148A (en) * 2013-09-26 2014-01-22 中煤科工集团西安研究院有限公司 Technology and device for controlling pressure in layered mode and discharging and extracting oil in layer combined mode through double bushes and single pump
CN103089204B (en) * 2013-01-21 2015-04-08 中煤科工集团西安研究院有限公司 Double-coal-bed layered pressure control device combining coal discharging and coal mining
CN104912522A (en) * 2015-05-11 2015-09-16 中国矿业大学 Multi-hydraulic-fracturing-layer drainage and mining device for coal-bed gas well in high-stress region and multi-hydraulic-fracturing-layer drainage and mining process for coal-bed gas well in high-stress region
CN105649578A (en) * 2016-01-29 2016-06-08 西南石油大学 Vertical-well double-layer partial-pressure commingling method and device for coalbed methane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU447515A1 (en) * 1972-05-05 1974-10-25 Ордена Трудового Красного Знамени Институт Горного Дела Им.А.А.Скочинского The way to deal with dust and gas in coal mines
CN102434135A (en) * 2011-12-02 2012-05-02 河南理工大学 Multi-layer discharge and mining device for multiple seam developed area
CN103061724A (en) * 2013-01-21 2013-04-24 中煤科工集团西安研究院 Layered pressure control combined drainage-production device for double coal-beds prone to dust and sand spraying
CN103089204B (en) * 2013-01-21 2015-04-08 中煤科工集团西安研究院有限公司 Double-coal-bed layered pressure control device combining coal discharging and coal mining
CN103527148A (en) * 2013-09-26 2014-01-22 中煤科工集团西安研究院有限公司 Technology and device for controlling pressure in layered mode and discharging and extracting oil in layer combined mode through double bushes and single pump
CN104912522A (en) * 2015-05-11 2015-09-16 中国矿业大学 Multi-hydraulic-fracturing-layer drainage and mining device for coal-bed gas well in high-stress region and multi-hydraulic-fracturing-layer drainage and mining process for coal-bed gas well in high-stress region
CN105649578A (en) * 2016-01-29 2016-06-08 西南石油大学 Vertical-well double-layer partial-pressure commingling method and device for coalbed methane

Also Published As

Publication number Publication date
CN106988707B (en) 2019-12-17

Similar Documents

Publication Publication Date Title
CN102747967A (en) Multi-stage segmented release water exploration pipe column and method for casing well completion multi-stage fractured horizontal well
CN103306643B (en) A kind of water drainage gas production device and method
CN105134141A (en) Process pipe column
CN102230377A (en) Multifunctional gas lifting strata testing string
WO2020082716A1 (en) Multi-seam independent gas-bearing system pressure control and single-pump production device and production method
CN205936557U (en) Water injection oil production pipe
CN104234682A (en) Coiled tubing separate-layer fracturing method suitable for multiple thin coal seams
CN103089204A (en) Double-coal-bed layered pressure control device combining coal discharging and coal mining
CN104213861B (en) A kind of expansion tube expanding process and tool system
CN202832439U (en) Oil filed in-layer subdivision water injection technology tubular column
CN104213875A (en) Method for relieving annular belt pressure of natural gas and gas storage well
CN103061724B (en) Towards the layering pressure control associating mining device easily telling powder and telling the two coal seam of sand
CN106988707A (en) Double coal seam four-way packer layered pressure controls combine mining device and method
CN202081890U (en) All-service gas lifting stratum testing tubular column
CN205243462U (en) Shallow layer cover leaks big latus rectum metal inflation reinforcing apparatus
RU131075U1 (en) Installation for simultaneous separate production and pumping in one well
CN205558881U (en) Bridge type layering water injection string
CN104234638A (en) Casing completion multiple-segment fracturing horizontal well water exploration tubular pile and water exploration method thereof
CN105781506B (en) A kind of method of oil well delamination water filling
CN106640026A (en) Pressure control type intelligent production pipe column capable of injecting acid by layer selection and production method
CN206554888U (en) Pump assembly extracting device of oil is sprayed in the direct circulation of single tube post in oil pipe
CN107120072A (en) A kind of steel pipe type cable traversing device
CN206220933U (en) Oil recovery process units
CN107023259B (en) A kind of well system based on double-wall drill pipe
CN107339096A (en) A kind of quick groundwater prospecting method of horizontal well

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant