CN107780912A - Cased well fracturing fluid drainage method and system - Google Patents
Cased well fracturing fluid drainage method and system Download PDFInfo
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- CN107780912A CN107780912A CN201610799784.8A CN201610799784A CN107780912A CN 107780912 A CN107780912 A CN 107780912A CN 201610799784 A CN201610799784 A CN 201610799784A CN 107780912 A CN107780912 A CN 107780912A
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- electrodynamic type
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 title abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 230000005520 electrodynamics Effects 0.000 claims description 47
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 10
- 238000012856 packing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a cased well fracturing fluid drainage method and system, and belongs to the field of petroleum industry. The method comprises the following steps: the tool string is connected and comprises an electric centralizer, an electric submersible pump and an electric packer from bottom to top; connecting an armored cable to the tool string; lowering the tool string to a predetermined downhole location; starting the electric centralizer to perform centralizing operation; starting the electric packer to set and anchor the packer; and starting the electric submersible pump to discharge liquid. The method and the system provided by the invention are not influenced by the dynamic liquid property when liquid is discharged, and the liquid discharging efficiency can be improved. The invention adopts the cased well fracturing liquid discharge technology to discharge liquid.
Description
Technical field
The present invention relates to petroleum industry field, more particularly to a kind of cased well fracturing liquid discharging method and system.
Background technology
With the fast development of petroleum industry, people produce the yield of liquid and quality to stratum higher requirement.In oil
In the work of exploration and development in field, in order to obtain more preferable production capacity, a kind of cased well fracturing liquid discharging mode can be taken as volume increase
Means.
Current cased well fracturing liquid discharging mode is mostly hydraulic jet pump discharge opeing, it is necessary to which supporting high-pressure ground pump, passes through
The high-pressure ground pump conveys power fluid into the power fluid injection pipeline of Christmas tree wellhead.Hydraulic jet pump includes connecting successively
High-pressure ground pump, mixing chamber, sealing mechanism and the low-pressure chamber connect, specific implementation process are：By high-pressure ground pump to oil
Power fluid is pumped into pipe, power fluid throttles at the nozzle of high-pressure ground pump, in nozzle and trunnion (high-pressure ground pump and hybrid chamber
Room junction) place's formation negative pressuren zone, formation fluid and power fluid mix, flow through the anemostat in low-pressure chamber, mix here
Liquid is when by the anemostat, and because area of passage gradually increases, mixing flow velocity is reduced, and pressure increase, mixed liquor is pressed herein
Ground is lifted to by oil pipe annular space in the presence of power.
During the present invention is realized, inventor has found that prior art at least has problems with：
Hydraulic jet pump discharge opeing requires high to power fluid fluidity, if power fluid has bulk hard impurity, easily block pumps
Core nozzle, influence discharge opeing efficiency.
The content of the invention
Pump core nozzle can be blocked in order to solve the problems, such as that power fluid fluidity is impure, the embodiments of the invention provide a kind of sleeve pipe
Well fracturing liquid discharging method and system.The technical scheme is as follows：
On the one hand, there is provided a kind of cased well fracturing liquid discharging method, methods described include：
Fastening means string, the tool string are respectively electric centralizer, electric submersible pump and electrodynamic type packer from the bottom to top；
Armored cable is connected into the tool string；
The tool string is transferred to underground precalculated position；
Start the electric centralizer and carry out righting operation；
Start the electrodynamic type packer and carry out packer setting and grappling；
Start the electric submersible pump discharge opeing.
Further, it is described that armored cable is connected into the tool string, including：
By armored cable, through cable blowout control box after connect the tool string；
The tool string is transferred to before the precalculated position of underground described, methods described also includes：
The tool string is sling, is entered through production tree in well；
The cable blowout control box is arranged on the production tree.
Wherein, the tool string is respectively electric centralizer, electric submersible pump, electrodynamic type packer and single current from the bottom to top
Valve.
Further, it is described that armored cable is connected into the tool string, including：
Armored cable in vehicle-mounted roller measuring truck is connected into the tool string, is configured with the vehicle-mounted roller measuring truck
Discharge opeing control system, data collecting system is provided with the electric submersible pump, and the discharge opeing control system is used to pass through the armouring
Cable carries out the transmission of data with the data collecting system.
Optionally, after the startup electric submersible pump discharge opeing, methods described also includes：
The data collecting system gathers downhole data；
The discharge opeing control system receives the downhole data of the data collecting system collection by the armored cable, and
The lifting rate of the electric submersible pump is adjusted according to the downhole data.
On the other hand, there is provided a kind of cased well fracturing liquid discharging system, the system include：
Electrodynamic type packer, electric submersible pump and the electric centralizer being from top to bottom electrically connected successively with armored cable,
The electrodynamic type packer, the electric submersible pump and the electric centralizer are arranged at underground.
Optionally, the system also includes：Cable blowout control box and production tree, the cable blowout control box are arranged on the oil recovery
On tree；
The armored cable sequentially pass through after the cable blowout control box and the production tree with electrodynamic type packer electricity
Connection.
Optionally, the system also includes：Ball-and-seat, the ball-and-seat are connected with the electrodynamic type packer, the armour
Dress cable electrically connects through the ball-and-seat with the electrodynamic type packer.
Optionally, the system also includes：Vehicle-mounted roller measuring truck, discharge opeing control is configured with the vehicle-mounted roller measuring truck
System processed, described armored cable one end electrically connect with the discharge opeing control system, and the other end is electrically connected with the electrodynamic type packer
Connect；
Be provided with data collecting system on the electric submersible pump, the discharge opeing control system be used for by the armored cable with
The data collecting system carries out the transmission of data.
Further, the data collecting system includes：Pressure gauge.
Further, the electrodynamic type packer, the electric submersible pump and the electric centralizer are threadedly coupled successively.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Cased well fracturing liquid discharging method provided in an embodiment of the present invention, it is by the instrument of connection in specific operation process
String decentralization to underground precalculated position carries out discharge opeing, the tool string of connection be respectively from the bottom to top electrodynamic type packer, electric submersible pump and
Electric centralizer, and be attached using electric connection mode with armored cable, power fluid driving is not needed in discharge opeing, because
This, this method is not influenceed by power fluid fluidity, can improve discharge opeing efficiency.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of cased well fracturing liquid discharging method flow diagram that the embodiment of the present invention one provides；
Fig. 2 is a kind of cased well fracturing liquid discharging method flow diagram that the embodiment of the present invention two provides；
Fig. 3 is a kind of cased well fracturing liquid discharging system structure diagram that the embodiment of the present invention three provides.
Wherein, it is as follows to each label declaration of accompanying drawing：
1 vehicle-mounted roller measuring truck, 2 cable blowout control boxes, 3 production trees, 4 armored cables, 5 ball-and-seats, 6 electrodynamic type packers, 7
Electric submersible pump, 8 data collecting systems, 9 electric centralizers.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
A kind of cased well fracturing liquid discharging method is present embodiments provided, referring to Fig. 1, this method flow is specific as follows：
Step 101, fastening means string, tool string are respectively electric centralizer, electric submersible pump and electrodynamic type envelope from the bottom to top
Every device.
Step 102, by armored cable fastening means string.
Step 103, tool string transferred to underground precalculated position.
Step 104, start electric centralizer progress righting operation.
Step 105, start electrodynamic type packer progress packer setting and grappling.
Step 106, start electric submersible pump discharge opeing.
In summary, cased well fracturing liquid discharging method provided in an embodiment of the present invention, it is by even in specific operation process
The tool string connect is transferred to underground precalculated position and carries out discharge opeing, the tool string of connection be respectively from the bottom to top electrodynamic type packer,
Electric submersible pump and electric centralizer, and be attached using electric connection mode with armored cable, do not need power in discharge opeing
Liquid is driven, and therefore, this method is not influenceed by power fluid fluidity, can improve discharge opeing efficiency.
The embodiments of the invention provide a kind of cased well fracturing liquid discharging method, and referring to Fig. 2, this method flow includes：
Step 201, fastening means string, tool string are respectively electric centralizer, electric submersible pump and electrodynamic type envelope from the bottom to top
Every device.
Example, as shown in figure 3, electric centralizer 9, electric submersible pump 7 and electrodynamic type envelope can be sequentially connected from the bottom to top
Every device 6, the tool string after being connected, electric submersible pump 7 and electrodynamic type packer 6 can also be first connected, then the electricity after connection is dived
Pump 7 and electrodynamic type packer 6 are attached with electric centralizer 9, the tool string after being connected.It should be noted that this
Embodiment is not defined to the order of connection of tool string, can be attached according to the order of connection mentioned in the step,
Can be other orders of connection.
In practical application, tool string can also include ball-and-seat 5, and the ball-and-seat 5 is arranged on the upper of electrodynamic type packer 6
Side, that is to say the tool string after connection is respectively electric centralizer 9, electric submersible pump 7, electrodynamic type packer 6 and list from the bottom to top
Flow valve 5.In addition, ball-and-seat 5 can prevent liquid from flowing backwards, so as to protect electric submersible pump 7.
202nd, the armored cable in vehicle-mounted roller measuring truck is connected into the tool string, configured on the vehicle-mounted roller measuring truck
There is discharge opeing control system, data collecting system is provided with electric submersible pump, discharge opeing control system is used to pass through armored cable and data
Acquisition system carries out the transmission of data.
Specifically, the armored cable fastening means string in vehicle-mounted roller measuring truck refers to the rolling in vehicle-mounted roller measuring truck
The connector of the armored cable other end, is then connected by cylinder winding armored cable with the tool string.It should be noted that armour
Dress cable is to be processed to flexible solid combination mounted in having in the metal sleeve of insulating materials by different material conductors
Body, in actual applications, the discharge opeing control system configured on vehicle-mounted roller measuring truck and the data acquisition system set on electric submersible pump
When system carries out data transmission, armored cable can be as the carrier of data transfer.
In practical application, in discharge opeing process is carried out, blowout can be prevented by installing cable blowout control box, can be construction
Safety provides safeguard., can be by armored cable, through cable blowout control box for example, when armored cable is connected into the tool string
After connect the tool string, then sling the tool string using crane, through production tree enter well in, finally by cable blowout control
Box is arranged on production tree.
It should be noted that cable blowout control box mainly includes buffering instrument structure, sealing structure of cylinder, overfall and armour
Cable inlet is filled, buffering instrument structure is connected by sealing structure of cylinder respectively at overfall and armored cable entrance.Armour
Filling cable concatenation instrument can be through on the central axis of whole blowout prevention box, for raising and decentralizing instrument.
Step 203, tool string transferred to underground precalculated position.
It should be noted that when underground precalculated position refers to carry out discharge opeing, staff sets according to different hole conditions
Different drain locations.Example, the tool string can be sling using crane and is transferred to underground precalculated position.
Step 204, start electric centralizer progress righting operation.
It should be noted that electric centralizer mainly includes control circuit, direct current generator, the control circuit can receive
Enabled instruction, the direct current generator can be started and rotated, the righting arm of centralizer is shunk or is opened, helped so as to realize
Orthofunction.
Specifically, in the present embodiment, electric centralizer carries out righting by the way of electronic, on vehicle-mounted roller measuring truck
The discharge opeing control system of configuration can be by armored cable transmitting telecommunication number, and then starts electric centralizer and carry out righting work
Industry.
Step 205, start electrodynamic type packer progress packer setting and grappling.
It should be noted that electrodynamic type packer mainly includes motor, packing element, power transmission shaft, transmission nut, branch
Bar and support watt etc., its operation principle is specially motor rotation, and power transmission shaft rotation, two transmission nut bands are driven by motor
Move two poles to go in the same direction, support watt is opened, envelope that packing element is swollen.While packing element swollen envelope is realized, balance
Piston is moved to right, and relief hole is blocked, and sleeve pipe is divided into left and right oil pocket by packing element, so as to complete setting for packing element.
Specifically, in the present embodiment, electrodynamic type packer is completed by the way of electronic, is configured on vehicle-mounted roller measuring truck
Discharge opeing control system can carry out packer setting and anchor by armored cable transmitting telecommunication number, and then to electrodynamic type packer
It is fixed.
Step 206, start electric submersible pump discharge opeing.
In practical application, start electric submersible pump discharge opeing before, it is necessary to complete this qualified process of applied pressure by annulus pressure testing, Ran Houqi
Dynamic electric submersible pump carries out discharge opeing.
It should be noted that electric submersible pump can be a kind of electric centrifugal pump be connected in series by multistage blade guiding wheel, work as latent oil
When blade guiding wheel on motor driven pump shaft rotates at a high speed, liquid the using in centrifugal force in impeller, from impeller central
The surrounding to impeller is got rid of along interlobate runner, because liquid is acted on by blade, its pressure and speed increase simultaneously, are leading
Speed can be transformed into pressure energy again under the further effect of wheel, while flow to next stage impeller eye, so successively pass through multistage
The effect of blade guiding wheel, fluid pressure energy gradually increase and flowed when obtaining the energy for being enough to overcome the pipe resistance after pump discharge
To ground, reach the purpose of oil exploitation.
Step 207, data collecting system can gather downhole data.
Specifically, downhole data refers to the pressure data of the pressure gauge collection in data collecting system, armouring can be passed through
Cable is real-time transmitted to the discharge opeing control system on vehicle-mounted roller measuring truck.In addition, the present embodiment is not adopted to data collecting system
The mode of collection downhole data is specifically limited, and can carry out data acquisition by prior art.In the present embodiment, data acquisition
Pressure gauge is carried in system, pressure gauge collection downhole data can be utilized.
It should be noted that pressure gauge is the instrument for measuring Fluid pressure.All it is generally by by measuring pressure and some
Reference pressure (such as atmospheric pressure or other setting pressures) is compared, thus what is measured is relative pressure or pressure differential.
The downhole data that step 208, discharge opeing control system are gathered by armored cable reception data collecting system, and according to
Downhole data adjusts the lifting rate of electric submersible pump.
Specifically, carrier of the armored cable as data transfer, the underground number that pressure gauge in data collecting system is gathered
According to the discharge opeing control system being real-time transmitted on vehicle-mounted roller measuring truck, the discharge opeing of electric submersible pump can be adjusted according to real time data
Amount.
In summary, cased well fracturing liquid discharging method provided in an embodiment of the present invention, it is by even in specific operation process
The tool string connect is transferred to underground precalculated position and carries out discharge opeing, the tool string of connection be respectively from the bottom to top electrodynamic type packer,
Electric submersible pump and electric centralizer, and be attached using electric connection mode with armored cable, do not need power in discharge opeing
Liquid is driven, and therefore, this method is not influenceed by power fluid fluidity, can improve discharge opeing efficiency.In addition, data collecting system can be with
Downhole data is real-time transmitted to by discharge opeing control system by armored cable, and the discharge opeing of electric submersible pump is adjusted according to downhole data
Amount, so as to improve discharge opeing efficiency.
Referring to Fig. 3, the embodiments of the invention provide a kind of cased well fracturing liquid discharging system, the system includes：
Electrodynamic type packer 6, electric submersible pump 7 and the electric centralizer being from top to bottom electrically connected successively with armored cable
9, electrodynamic type packer 6, electric submersible pump 7 and electric centralizer 9 are arranged at underground.
In summary, cased well fracturing liquid discharging method provided in an embodiment of the present invention, it is by even in specific operation process
The tool string connect is transferred to underground precalculated position and carries out discharge opeing, the tool string of connection be respectively from the bottom to top electrodynamic type packer,
Electric submersible pump and electric centralizer, and be attached using electric connection mode with armored cable, do not need power in discharge opeing
Liquid is driven, and therefore, this method is not influenceed by power fluid fluidity, can improve discharge opeing efficiency.
Further, the system also includes：Cable blowout control box 2 and production tree 3, cable blowout control box 2 are arranged on production tree 3
On.
Armored cable 4 electrically connects after sequentially passing through cable blowout control box 2 and production tree 4 with electrodynamic type packer 6.
Further, the system also includes：Ball-and-seat 5, ball-and-seat 5 are connected with electrodynamic type packer 6, and armored cable 4 is worn
Ball-and-seat 5 is crossed to electrically connect with electrodynamic type packer 6.
Further, the system also includes：Vehicle-mounted roller measuring truck 1, discharge opeing control is configured with the vehicle-mounted roller measuring truck 1
System processed, the one end of armored cable 4 electrically connect with discharge opeing control system, and the other end electrically connects with electrodynamic type packer 6.
Data collecting system 8 is provided with electric submersible pump 7, discharge opeing control system is used for by armored cable 4 and the data
Acquisition system 8 carries out the transmission of data.
Wherein, data collecting system includes：Pressure gauge.
Specifically, pressure gauge is the instrument for measuring Fluid pressure.Generally all it is that will be pressed by measuring pressure and some reference
Power (such as atmospheric pressure or other setting pressures) is compared, thus what is measured is relative pressure or pressure differential.In practical application,
Downhole data can be gathered using pressure gauge, the discharge opeing control on vehicle-mounted roller measuring truck 1 is real-time transmitted to by armored cable 4
System processed.
Further, electrodynamic type packer 6, electric submersible pump 7 and electric centralizer 9 are threadedly coupled successively.
Specifically, the present embodiment is not carried out to the connected mode of electrodynamic type packer 6, electric submersible pump 7 and electric centralizer 9
Limit, herein using threaded connection.
In summary, cased well fracturing liquid discharging method provided in an embodiment of the present invention, it is by even in specific operation process
The tool string connect is transferred to underground precalculated position and carries out discharge opeing, the tool string of connection be respectively from the bottom to top electrodynamic type packer,
Electric submersible pump and electric centralizer, and be attached using electric connection mode with armored cable, do not need power in discharge opeing
Liquid is driven, and therefore, this method is not influenceed by power fluid fluidity, can improve discharge opeing efficiency.In addition, data collecting system can be with
Downhole data is real-time transmitted to by discharge opeing control system by armored cable, and the discharge opeing of electric submersible pump is adjusted according to downhole data
Amount, so as to improve discharge opeing efficiency.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
With the specific work process of device, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (11)
- A kind of 1. cased well fracturing liquid discharging method, it is characterised in that including：Fastening means string, the tool string are respectively electric centralizer, electric submersible pump and electrodynamic type packer from the bottom to top；Armored cable is connected into the tool string；The tool string is transferred to underground precalculated position；Start the electric centralizer and carry out righting operation；Start the electrodynamic type packer and carry out packer setting and grappling；Start the electric submersible pump discharge opeing.
- 2. according to the method for claim 1, it is characterised in that it is described that armored cable is connected into the tool string, including：By armored cable, through cable blowout control box after connect the tool string；The tool string is transferred to before the precalculated position of underground described, methods described also includes：The tool string is sling, is entered through production tree in well；The cable blowout control box is arranged on the production tree.
- 3. according to the method for claim 1, it is characterised in that the tool string is respectively electrodynamic type righting from the bottom to top Device, electric submersible pump, electrodynamic type packer and ball-and-seat.
- 4. according to the method for claim 1, it is characterised in thatIt is described that armored cable is connected into the tool string, including：Armored cable in vehicle-mounted roller measuring truck is connected into the tool string, discharge opeing is configured with the vehicle-mounted roller measuring truck Control system, data collecting system is provided with the electric submersible pump, and the discharge opeing control system is used to pass through the armored cable The transmission of data is carried out with the data collecting system.
- 5. according to the method for claim 4, it is characterised in that after the startup electric submersible pump discharge opeing, the side Method also includes：The data collecting system gathers downhole data；The downhole data that the discharge opeing control system is gathered by the armored cable reception data collecting system, and according to The downhole data adjusts the lifting rate of the electric submersible pump.
- 6. a kind of cased well fracturing liquid discharging system, it is characterised in that the system includes：Electrodynamic type packer, electric submersible pump and the electric centralizer being from top to bottom electrically connected successively with armored cable, it is described Electrodynamic type packer, the electric submersible pump and the electric centralizer are arranged at underground.
- 7. system according to claim 6, it is characterised in that the system also includes：Cable blowout control box and production tree, institute Cable blowout control box is stated to be arranged on the production tree；The armored cable electrically connects after sequentially passing through the cable blowout control box and the production tree with the electrodynamic type packer.
- 8. system according to claim 6, it is characterised in that the system also includes：Ball-and-seat,The ball-and-seat is connected with the electrodynamic type packer, and the armored cable seals through the ball-and-seat and the electrodynamic type Electrically connected every device.
- 9. system according to claim 6, it is characterised in that the system also includes：Vehicle-mounted roller measuring truck, the car Carry and be configured with discharge opeing control system on roller measuring truck, described armored cable one end electrically connects with the discharge opeing control system, separately One end electrically connects with the electrodynamic type packer；Be provided with data collecting system on the electric submersible pump, the discharge opeing control system be used for by the armored cable with it is described Data collecting system carries out the transmission of data.
- 10. system according to claim 9, it is characterised in that the data collecting system includes：Pressure gauge.
- 11. according to any described system of claim 6 to 10, it is characterised in that the electrodynamic type packer, the electric submersible pump It is threadedly coupled successively with the electric centralizer.
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| CN201610799784.8A CN107780912B (en) | 2016-08-31 | 2016-08-31 | Cased well fracturing fluid drainage method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872940A (en) * | 2018-08-29 | 2020-03-10 | 中国石油天然气股份有限公司 | Liquid discharge device and using method thereof |
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| WO2003042496A1 (en) * | 2001-11-15 | 2003-05-22 | Bp Exploration Operating Company Limited | Method for diverting treatment fluid into a low permeability zone of a formation |
| US20040251019A1 (en) * | 2003-06-11 | 2004-12-16 | Wood Group Esp, Inc. | Bottom discharge seal section |
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| CN104912545A (en) * | 2015-06-08 | 2015-09-16 | 河北昆瑞工程技术有限公司 | Well testing system combining electric control type oil pipe inner packer and direct reading pressure meter and well testing method combining electric control type oil pipe inner packer and direct reading pressure meter |
| CN105239970A (en) * | 2015-11-12 | 2016-01-13 | 杭州乾景科技有限公司 | Submersible direct-drive screw pump oil production equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110872940A (en) * | 2018-08-29 | 2020-03-10 | 中国石油天然气股份有限公司 | Liquid discharge device and using method thereof |
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