CN105909205B - A kind of New Active hydraulic control packer - Google Patents
A kind of New Active hydraulic control packer Download PDFInfo
- Publication number
- CN105909205B CN105909205B CN201610495456.9A CN201610495456A CN105909205B CN 105909205 B CN105909205 B CN 105909205B CN 201610495456 A CN201610495456 A CN 201610495456A CN 105909205 B CN105909205 B CN 105909205B
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- Prior art keywords
- hydraulic cylinder
- oil circuit
- mandrel
- hydraulic
- chamber
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
Abstract
The invention discloses a kind of New Active hydraulic control packer, the promotion hydraulic cylinder being threadedly coupled between each other is also sequentially arranged on mandrel, act hydraulic cylinder and power hydraulic cylinder, the fuel feeding end of axial plunger pump is communicated to power hydraulic cylinder right chamber, oil circuit I is offered on mandrel, oil circuit II, oil circuit III and oil circuit IV, the magnetic valve for controlling it to open and close by controller is respectively equipped with above-mentioned four oil circuits, power hydraulic cylinder left chamber is communicated to action hydraulic cylinder left chamber by oil circuit I, action hydraulic cylinder right chamber is communicated to by oil circuit II and promotes hydraulic cylinder vacuum chamber, power hydraulic cylinder left chamber is communicated to action hydraulic cylinder right chamber by oil circuit III, action hydraulic cylinder left chamber is communicated to by oil circuit IV and promotes hydraulic cylinder vacuum chamber；The present invention includes multi-cylinder combination drive module, pump valve integration module, mandrel asphalt channel and vacuum chamber setting etc., so as to reduce the complexity of packer, improves the reliability of system.
Description
Technical field
The present invention relates to a kind of underground oil layer protection packer, concretely relates to a kind of high in petroleum production engineering high temperature
Petroleum pipe column can be completely cut off payzone by pressing under severe working environment, the active hydraulic control packer of protection sleeve pipe.
Background technology
Packer is that different oil reservoirs, water layer are separated in the wellbore and bear the downhole tool of certain pressure difference.It is full
Sufficient DP technology requirement, can descend pit shaft precalculated position, packing is tight, and and can has durability in underground.
Due to the shortage of current oil resource, the depth of oil exploitation is gradually deepened, so as to cause the increase of the difficulty of exploitation,
The environment of exploitation is more and more severe, so the structure to packer and performance specification more and more higher.Existing hydraulic control packing
Problems with mostly in real work be present in device：Tedious process, and be unable to recycled for multiple times, during so as to have a strong impact on work
Between and efficiency, increase cost；Because in the fluid power system of hydraulic control packer, reliability link is more, complicated, modularization
Difference, cause maintenance and installation difficult, and be difficult to ensure that the reliability to be worked under the deep-well environment of HTHP, easily cause packing
Device fails or scrapped in the course of the work, so as to influence packer normal work.
The content of the invention
It is an object of the present invention to for solve present in existing hydraulic control packer it is complicated, modularization is poor, can not
The problems such as repeatedly recycling, it is proposed that a kind of New Active hydraulic control packer, including multi-cylinder combination drive module, pump valve integrate
Module, mandrel asphalt channel and vacuum chamber setting etc., so as to reduce the complexity of packer, improve the reliable of system
Property.
To achieve the above object, the technical solution adopted in the present invention is：A kind of New Active hydraulic control packer, including：
The mandrel of fixed setting, is arranged with top connection and lower contact on mandrel, top connection one end and lower contact one end be in close contact and on
The outside of joint and lower contact is threadedly coupled by liner ring, and the inner side of top connection and lower contact passes through balancing sleeve and mandrel spiral shell
Line connects；Contiguous block is additionally provided with mandrel, one end of contiguous block is threadedly coupled with the other end of lower contact；
Also it has been sequentially arranged on the mandrel and has promoted hydraulic cylinder, action hydraulic cylinder and power hydraulic cylinder, above-mentioned three and core
It is that gap coordinates between axle, described power hydraulic cylinder one end and action hydraulic cylinder one end, and the other end of action hydraulic cylinder
With promoting one end of hydraulic cylinder to be connected using double thread；Briquetting is also arranged with mandrel, promotes the other end and pressure of hydraulic cylinder
Block is connected using double thread, and packing element is provided between contiguous block and briquetting；
Floating piston is provided with the cylinder barrel of the power hydraulic cylinder, the power hydraulic cylinder other end is connected with protective cover, protection
Hydraulic manifold block is provided with cover, hydraulic manifold block is threadedly coupled with mandrel and hydraulic manifold block with protective cover, Hydraulic integration
Motor, decelerator, axial plunger pump and magnetic valve are equiped with block；
The fuel feeding end of the axial plunger pump passes sequentially through the oil circuit on hydraulic manifold block and the oil circuit being opened on mandrel
Power hydraulic cylinder right chamber is communicated to, oil circuit I, oil circuit II, oil circuit III and oil circuit IV, oil circuit I, oil circuit are offered on described mandrel
IIth, magnetic valve b, magnetic valve c, magnetic valve d, the electromagnetism for controlling it to open and close by controller are respectively arranged with oil circuit III and oil circuit IV
Valve a, it is provided with mandrel and passes through oil for the electromagnetism plug and power interface to above-mentioned solenoid valve, power hydraulic cylinder left chamber
Road I is communicated to action hydraulic cylinder left chamber, and action hydraulic cylinder right chamber is communicated to by oil circuit II and promotes hydraulic cylinder vacuum chamber, power fluid
Cylinder pressure left chamber is communicated to action hydraulic cylinder right chamber by oil circuit III, and action hydraulic cylinder left chamber is communicated to promotion hydraulic pressure by oil circuit IV
Cylinder vacuum chamber；
Opening magnetic valve b and magnetic valve c and in the state of simultaneously closing off magnetic valve a and magnetic valve d, floating piston and each
The motion in the same direction simultaneously of individual Barrel of Hydraulic Cylinders, the displacement of floating piston is twice of Barrel of Hydraulic Cylinders displacement under the same time, and then
Fluid in power hydraulic cylinder left chamber is squeezed generation pressure, and fluid enters in action hydraulic cylinder left chamber, promotes hydraulic pressure
Cylinder drives briquetting, to extrude packing element, to complete to set to left movement.
As a further improvement, being also arranged with inner support on the mandrel, inner support is threadedly coupled with hydraulic manifold block,
Axial plunger pump is arranged on inner support.
As a further improvement, the inner chamber of the promotion hydraulic cylinder is vacuum cavity configuration.
As a further improvement, between the action hydraulic cylinder and promotion hydraulic cylinder and promotion hydraulic cylinder and briquetting
Using O-ring end face seal.
It is threadedly coupled as a further improvement, being used between the protective cover and top connection.
It is threadedly coupled as a further improvement, the contiguous block uses with mandrel.
It is threadedly coupled as a further improvement, the balancing sleeve uses with inner support.
As a further improvement, between multigroup hydraulic cylinder and mandrel, and in floating piston and power hydraulic cylinder
Also sealed between wall from O-ring.
As a further improvement, end face seal is carried out using O-ring between the axial plunger pump and inner support.
Compared with prior art, beneficial effects of the present invention are：
1. the present invention is multi-cylinder combination driving, this kind of design is with machining is convenient, manufacturing cost is low, is easy to tie up
The advantages that repairing and repeatedly recycling；
2. being attached between multigroup hydraulic cylinder of the present invention by double thread, and O-ring end face seal is selected, so as to protect
Demonstrate,prove the sealing property between hydraulic cylinder；
3. the present invention in whole work process, promotes the load suffered by hydraulic cylinder to be eventually transferred to multigroup hydraulic cylinder
Connection screw thread at, the shell of multigroup hydraulic cylinder is also that shell serves as push rod to final load bearing component afterwards in itself, with play knot
The purpose that structure simplifies；
4. because packer overall structure requires compact, each Hydraulic Elements are installed in order to save space, designed
Special hydraulic manifold block, is easily installed and debugs；
5. the oil circuit design on hydraulic manifold block and mandrel, makes hydraulic oil be directly entered the power hydraulic cylinder right chamber of packer
It is interior, promote floating piston work, it is possible to increase the operating efficiency for setting and unsealing, shorten working hours；
6. promoting the structure design of hydraulic cylinder vacuum chamber, the oil return efficiency for setting and unsealing can be improved.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the operation principle schematic diagram of the present invention.
Fig. 3 is the operation principle schematic diagram for the process that sets.
Fig. 4 is the operation principle schematic diagram of deblocking process.
Marked in figure：1st, top connection, 2, balancing sleeve, 3, liner ring, 4, lower contact, 5, contiguous block, 6, packing element, 7, pressure
Block, 8, promote hydraulic cylinder, 801, promote hydraulic cylinder vacuum chamber, 9, mandrel, 10, action hydraulic cylinder, 1001, action hydraulic cylinder it is left
Chamber, 1002, action hydraulic cylinder right chamber, 11, floating piston, 12, hydraulic manifold block, 13, magnetic valve, 14, inner support, 15, slow down
Device, 16, motor, 17, electromagnetism plug, 18, power interface, 19, axial plunger pump, 20, protective cover, 21, power hydraulic cylinder,
2101st, power hydraulic cylinder right chamber, 2102, power hydraulic cylinder left chamber.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
As depicted in figs. 1 and 2, a kind of New Active hydraulic control packer, include the mandrel 9 of fixed setting, be arranged on mandrel 9
There are top connection 1 and lower contact 4, the one end of top connection 1 and the one end of lower contact 4 are in close contact and the outside of top connection 1 and lower contact 4 leads to
Cross liner ring 3 to be threadedly coupled, the inner side of top connection 1 and lower contact 4 is threadedly coupled by balancing sleeve 2 with mandrel 9；On mandrel 9
Contiguous block 5 is additionally provided with, one end of contiguous block 5 is threadedly coupled with the other end of lower contact 4, and contiguous block 5 is connected with mandrel 9 using screw thread
Connect.
Also be sequentially arranged on mandrel 9 and promoted hydraulic cylinder 8, action hydraulic cylinder 10 and power hydraulic cylinder 21, above-mentioned three with
It is that gap coordinates between mandrel 9.The present invention is made up of multigroup hydraulic cylinder, if multigroup cylinder design into an entirety knot
Structure, then inner loop, which is reduced, lacks, and can improve the reliability of design to a certain extent.But, it is contemplated that machining difficulty or ease into
Degree, the factor such as manufacturing cost, therefore by multigroup hydraulic cylinder separate design, the one end of power hydraulic cylinder 21 and action hydraulic cylinder 10 1
End, and the other end of action hydraulic cylinder 10 are connected with one end of promotion hydraulic cylinder 8 using double thread；Also it is arranged on mandrel 9
There is briquetting 7, promote the other end of hydraulic cylinder 8 to be connected with briquetting 7 using double thread, packing element 6 is provided between contiguous block 5 and briquetting 7；
Act hydraulic cylinder 10 and promote hydraulic cylinder 8 and promote close using O-ring end face between hydraulic cylinder 8 and briquetting 7
Envelope.The inner chamber for promoting hydraulic cylinder 8 is vacuum cavity configuration.
Floating piston 11 is provided with the cylinder barrel of power hydraulic cylinder 21, the other end of power hydraulic cylinder 21 is connected with protective cover 20.
Because packer overall structure requires compact, each Hydraulic Elements are installed in order to save space, devise special liquid
Integrated package is pressed, is easily installed and debugs, hydraulic manifold block 12 is arranged in protective cover 20, between hydraulic manifold block 12 and mandrel 9
Using threaded connection, motor 16, decelerator 15, axial plunger pump 19 and magnetic valve 13 are equiped with hydraulic manifold block 12, is protected
Cover 20 is connected with the threaded one end of the top connection 1 of another packer.Protective cover 20 is carried out with hydraulic manifold block 12 by screw thread
Connection, plays buffer action, so as to ensure that magnetic valve and control line etc. are not disturbed by extraneous adverse circumstances.
Five wire-passing tubes and four oil circuits are offered on mandrel 9, are angularly distributed along the circumference of mandrel, hydraulic manifold block 12
It is upper it is corresponding with mandrel 9 devise five wire-passing tubes and four oil-outs, what the hydraulic system was taken is monoblock type fuel tank, shell
The hydraulic oil being inside full of serves the effect of fuel tank, the hydraulic oil that axial plunger pump 19 exports, by four magnetic valves to each oil
Road is controlled.
C holes are offered in power hydraulic cylinder left chamber 2102, action hydraulic cylinder left chamber 1001 offers B holes, acts hydraulic cylinder
Right chamber 1002 offers F holes, promotes hydraulic cylinder vacuum chamber 801 to offer E holes, power hydraulic cylinder left chamber 2102 offers G holes, pushed away
Hydrodynamic cylinder pressure vacuum chamber 801 offers A holes, and power hydraulic cylinder right chamber 2101 offers the D holes that feed flow force feed enters.
The fuel feeding end of the axial plunger pump 19 passes sequentially through the oil circuit on hydraulic manifold block 12 and is opened on mandrel 9
Oil communication offers oil circuit I, oil circuit II, oil circuit III and oil circuit IV to power hydraulic cylinder right chamber 2101 on described mandrel 9,
Magnetic valve b, magnetic valve c, the electricity for controlling it to open and close by controller are respectively arranged with oil circuit I, oil circuit II, oil circuit III and oil circuit IV
Magnet valve d, magnetic valve a, it is provided with for the electromagnetism plug 17 and power interface 18 to above-mentioned solenoid valve, power on mandrel 9
Hydraulic cylinder left chamber 2102 is communicated to action hydraulic cylinder left chamber 1001 by oil circuit I, and action hydraulic cylinder right chamber 1002 passes through oil circuit II
It is communicated to and promotes hydraulic cylinder vacuum chamber 801, power hydraulic cylinder left chamber 2102 is communicated to action hydraulic cylinder right chamber by oil circuit III
1002, action hydraulic cylinder left chamber 1001 is communicated to by oil circuit IV promotes hydraulic cylinder vacuum chamber 801；
Inner support 14 is also arranged with mandrel 9, inner support 14 is threadedly coupled with hydraulic manifold block 12, and axial plunger pump 19 is pacified
On inner support 14, end face seal is carried out using O-ring between axial plunger pump 19 and inner support 14.Balancing sleeve 2 and core
Between axle 9, and it is attached between balancing sleeve 2 and inner support 14 by screw thread.
Its operation principle is：
Start after setting, in the state of opening magnetic valve b and magnetic valve c and simultaneously closing off magnetic valve a and magnetic valve d,
Floating piston 11 and the motion in the same direction simultaneously of each Barrel of Hydraulic Cylinders, the displacement of floating piston 11 is Barrel of Hydraulic Cylinders under the same time
Twice of displacement, the i.e. movement velocity of floating piston 11 are twice of the movement velocity of cylinder barrel, and then power hydraulic cylinder left chamber
Fluid in 2102 is squeezed generation pressure, and fluid is entered in action hydraulic cylinder left chamber 1001, promotes the band of hydraulic cylinder 8
Dynamic pressure block 7, to extrude packing element 6, is completed to set to left movement.The load of this forces hydraulic cylinder 8 has been eventually transferred to multigroup liquid
At the connection screw thread of cylinder pressure, the shell of multigroup hydraulic cylinder is also that shell serves as push rod to final load bearing component afterwards in itself.
Start solution to be honored as a queen, in the state of opening magnetic valve a and magnetic valve d and simultaneously closing off magnetic valve b and magnetic valve c,
Power hydraulic cylinder left chamber 2102 is connected with action hydraulic cylinder right chamber 1002 and the pressure of two chambers is equal, hydraulic oil propulsion power hydraulic pressure
Cylinder right chamber 2101 drives whole outer cylinder to be unsealed, and the displacement of floating piston 11 is approximately 0, and outer cylinder drives briquetting 7 to transport to the right
Dynamic, packing element 6 restores, and completes deblocking.
Between multigroup hydraulic cylinder and mandrel 9, and O-ring is also selected between floating piston 11 and the inwall of power hydraulic cylinder 21
Sealed.In view of the oil temperature of hydraulic oil residing for sealing ring rubber can be made to have certain expansion, expansion system is eliminated in the change of oil temperature
Outside number changes, the elastic mould of rubber will also change.So the present invention is selected after being analyzed according to actual condition
Select, fluorubber is applied to petrochemical industry, and oil resistant is ageing-resistant, is the optimal selection that oil packer uses sealing ring.
As shown in Figure 3, it is assumed that floating piston moves x1 with respect to mandrel, and power hydraulic cylinder moves x2, instrument end with respect to mandrel
End final mean annual increment movement is x3, and oil pocket area is A.
When setting motion, floating piston produces motion with power hydraulic cylinder, it is assumed that and both direction of motion is downward, and two
Person makes fluid produce extruding and produces flow, the flow Q of fluid is because movement velocity is different：Q=(x1-x2) * A, this part
The flow squeezed out, which is entered in action hydraulic cylinder left chamber 1001, promotes outer cylinder to move downward, therefore has：Q= x3*A
The formula of simultaneous two can obtain
(x1-x2)*A= x3*A
That is x1-x2=x3 x1=x3+x2
Because cylinder barrel is generally rigidly connected, have
x2=x3
That is x1=2x2=2x3
It can be obtained by above result of calculation, the displacement of piston is 2 times of outer cylinder displacement.
It is assumed that floating piston moves x1 with respect to mandrel, power hydraulic cylinder moves x2, instrument end with respect to mandrel
End final mean annual increment movement is x3, and oil pocket area is A.During deblocking motion, it is assumed that floating piston moves downward with respect to mandrel, power hydraulic cylinder
Motion upwards, fluid is produced extruding and produce flow, the flow Q of fluid is：Q=(x1+x2) * A, the flow that this portion extrusion goes out
Entering in action hydraulic cylinder right chamber 1002 drives outer cylinder to move upwards, therefore has：
Q=x3*A
The formula of simultaneous two can obtain "
(x1+x2)*A= x3*A
That is x1+x2=x3 x1=x3-x2
Because cylinder barrel is generally rigidly connected, have：
x2=x3
That is x1=0, piston relative mandrel during deblocking are inactive state, power resources on floating piston with environment
The connected power area of pressure.
It can be seen that the displacement of piston is approximately 0 by above result of calculation, extraneous cylinder barrel motion.
Claims (9)
1. a kind of New Active hydraulic control packer, including：The mandrel of fixed setting（9）, mandrel（9）On be arranged with top connection（1）
And lower contact（4）, top connection（1）One end and lower contact（4）One end is in close contact and top connection（1）And lower contact（4）Outside
Pass through liner ring（3）Threaded connection, top connection（1）And lower contact（4）Inner side pass through balancing sleeve（2）With mandrel（9）Screw thread
Connection；Mandrel（9）On be additionally provided with contiguous block（5）, contiguous block（5）One end and lower contact（4）Other end threaded connection, it is special
Sign is：
The mandrel（9）On be also sequentially arranged promotion hydraulic cylinder（8）, action hydraulic cylinder（10）And power hydraulic cylinder（21）, on
State three and mandrel（9）Between be gap coordinate, the power hydraulic cylinder（21）One end and action hydraulic cylinder（10）One end, with
And action hydraulic cylinder（10）The other end with promote hydraulic cylinder（8）One end using double thread connect；Mandrel（9）On be also arranged
There is briquetting（7）, promote hydraulic cylinder（8）The other end and briquetting（7）Connected using double thread, contiguous block（5）With briquetting（7）Between
Provided with packing element（6）；
The power hydraulic cylinder（21）Cylinder barrel in be provided with floating piston（11）, power hydraulic cylinder（21）The other end is connected with protection
Cover（20）, protective cover（20）It is interior to be provided with hydraulic manifold block（12）, hydraulic manifold block（12）With mandrel（9）And hydraulic manifold block
（12）With protective cover（20）It is threadedly coupled, hydraulic manifold block（12）On be equiped with motor（16）, decelerator（15）, axial plunger
Pump（19）And magnetic valve（13）；
The axial plunger pump（19）Fuel feeding end pass sequentially through hydraulic manifold block（12）On oil circuit and be opened in mandrel（9）On
Oil communication to power hydraulic cylinder right chamber（2101）, described mandrel（9）On offer oil circuit I, oil circuit II, oil circuit III and oil
Road IV, magnetic valve b, the electromagnetism for controlling it to open and close by controller are respectively arranged with oil circuit I, oil circuit II, oil circuit III and oil circuit IV
Valve c, magnetic valve d, magnetic valve a, mandrel（9）On be provided with for the electromagnetism plug to above-mentioned solenoid valve（17）Connect with power supply
Mouthful（18）, power hydraulic cylinder left chamber（2102）Action hydraulic cylinder left chamber is communicated to by oil circuit I（1001）, act hydraulic cylinder right chamber
（1002）It is communicated to by oil circuit II and promotes hydraulic cylinder vacuum chamber（801）, power hydraulic cylinder left chamber（2102）Connected by oil circuit III
Pass to action hydraulic cylinder right chamber（1002）, act hydraulic cylinder left chamber（1001）It is communicated to by oil circuit IV and promotes hydraulic cylinder vacuum chamber
（801）；
In the state of opening magnetic valve b and magnetic valve c and simultaneously closing off magnetic valve a and magnetic valve d, floating piston（11）With it is each
The motion in the same direction simultaneously of individual Barrel of Hydraulic Cylinders, floating piston under the same time（11）Displacement be twice of Barrel of Hydraulic Cylinders displacement,
And then power hydraulic cylinder left chamber（2102）Interior fluid is squeezed generation pressure, and fluid enters action hydraulic cylinder left chamber（1001）
It is interior, promote hydraulic cylinder（8）Drive briquetting（7）To left movement to extrude packing element（6）, complete to set.
A kind of 2. New Active hydraulic control packer according to claim 1, it is characterised in that：The mandrel（9）On also cover
Provided with inner support（14）, inner support（14）With hydraulic manifold block（12）Threaded connection, axial plunger pump（19）Installed in inner support
（14）On.
A kind of 3. New Active hydraulic control packer according to claim 1 or 2, it is characterised in that：The promotion hydraulic cylinder
（8）Inner chamber be vacuum cavity configuration.
A kind of 4. New Active hydraulic control packer according to claim 1, it is characterised in that：The action hydraulic cylinder（10）
With promoting hydraulic cylinder（8）And promote hydraulic cylinder（8）With briquetting（7）Between use O-ring end face seal.
A kind of 5. New Active hydraulic control packer according to claim 1, it is characterised in that：The protective cover（20）With it is upper
Joint（1）Between using threaded connection.
A kind of 6. New Active hydraulic control packer according to claim 1, it is characterised in that：The contiguous block（5）With core
Axle（9）Using threaded connection.
A kind of 7. New Active hydraulic control packer according to claim 2, it is characterised in that：The balancing sleeve（2）With
Inner support（14）Using threaded connection.
A kind of 8. New Active hydraulic control packer according to claim 1, it is characterised in that：Multigroup hydraulic cylinder and core
Axle（9）Between, and floating piston（11）With power hydraulic cylinder（21）Also sealed between inwall from O-ring.
A kind of 9. New Active hydraulic control packer according to claim 1, it is characterised in that：The axial plunger pump（19）
With inner support（14）Between using O-ring carry out end face seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610495456.9A CN105909205B (en) | 2016-06-30 | 2016-06-30 | A kind of New Active hydraulic control packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610495456.9A CN105909205B (en) | 2016-06-30 | 2016-06-30 | A kind of New Active hydraulic control packer |
Publications (2)
| Publication Number | Publication Date |
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| CN105909205A CN105909205A (en) | 2016-08-31 |
| CN105909205B true CN105909205B (en) | 2018-04-10 |
Family
ID=56758867
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610495456.9A Active CN105909205B (en) | 2016-06-30 | 2016-06-30 | A kind of New Active hydraulic control packer |
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| CN112145109A (en) * | 2020-09-14 | 2020-12-29 | 南通大学 | Bridge plug valveless hydraulic setting tool |
| CN112324382B (en) * | 2020-11-03 | 2022-12-02 | 中国石油化工股份有限公司 | Plugging device and method for full-current-collection type gas production profile testing instrument |
| CN112664157A (en) * | 2020-12-30 | 2021-04-16 | 核工业北京地质研究院 | Pressure regulation and control device and method for packer |
| CN113445957B (en) * | 2021-09-01 | 2021-11-26 | 东营金昱技术开发有限公司 | Packer capable of protecting rubber cylinder for oil field water injection well |
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| Publication number | Publication date |
|---|---|
| CN105909205A (en) | 2016-08-31 |
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