CN107461174A - A kind of storm valve - Google Patents

A kind of storm valve Download PDF

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Publication number
CN107461174A
CN107461174A CN201710883093.0A CN201710883093A CN107461174A CN 107461174 A CN107461174 A CN 107461174A CN 201710883093 A CN201710883093 A CN 201710883093A CN 107461174 A CN107461174 A CN 107461174A
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CN
China
Prior art keywords
valve
ball
valve seat
collecting rack
piston cylinder
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
CN201710883093.0A
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Chinese (zh)
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CN107461174B (en
Inventor
唐洋
刘清友
陈志�
牟冠男
何玉发
张中根
易典学
安家伟
李旺
舒将军
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.)
Shenzhen Lite Energy Technology Co ltd
Southwest Petroleum University
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Southwest Petroleum University
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Priority to CN201710883093.0A priority Critical patent/CN107461174B/en
Publication of CN107461174A publication Critical patent/CN107461174A/en
Application granted granted Critical
Publication of CN107461174B publication Critical patent/CN107461174B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • E21B34/10Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole

Abstract

A kind of storm valve, it includes valve casing(1), be arranged at valve casing(1)Interior top plugging mechanism, bottom plugging mechanism, valve casing(1)Screw top be connected with tubing string(2), valve casing(1)Bottom be sequentially threaded with ring flange(3)And lower tubular column(4).The beneficial effect of invention is:Stable drive is accurate, and moment of torsion is big, can shear steel wire, coiled tubing etc.;With dual-plugging structure, and the automatic shutdown mechanism of hydraulic failure;Malleation connection can be achieved, discharge underground high-pressure fluid function;Can directly it be exchanged with joints such as drilling rod, oil pipe and water injection pipes, wide adaptation range.

Description

A kind of storm valve
Technical field
The present invention relates to Oil/gas Well exploration and development technical field, and in particular to pacifies a kind of underground for oil-gas exploration and development Full valve.
Background technology
In oil and gas exploration and development process, there are complex situations often in underground work(Overflow, well are invaded, blowout), Cause downhole fluid flow velocity and pressure anomaly, in addition it is uncontrollable, in order to ensure job safety, it is necessary to quickly and reliably block Underground high-pressure fluid.It is internal for drilling rod, oil pipe or water injection pipe etc. in actual production, it is necessary to a kind of storm valve is set, When there are complex situations, the closure of pit shaft inner high voltage fluid can be achieved;When in complex situations, pit shaft inner high voltage stream can be achieved Body safe release;It when in normal condition, can reopen, recover passage.Storm valve is a kind of guarantee production safety Downhole tool.For the high-pressure fluid in rapid and safe plugging tubing string, at the same such storm valve should also have with Lower feature and function, compact-sized, reliability is high, easy for installation, and service life is grown;Exportable high pulling torque, shear in pit shaft Steel wire, coiled tubing and cable etc.;Hydraulic control is failed, automatic plugging protection mechanism.However, existing storm valve is not The requirement of all kinds of operation techniques in petroleum exploration and development process can be met very well, and there are the following problems:Transmission mechanism design is multiple It is miscellaneous, poor reliability;Bumpy motion, easily failure under complex environment;Mostly single valve structure, the automatic shutdown mechanism of no-failure;Without just Press connectivity capabilities, it is impossible to coordinate kill-job operation.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art, realize that stable drive is accurate, and moment of torsion is big, can shear steel Silk, coiled tubing etc.;With dual-plugging structure, and the automatic shutdown mechanism of hydraulic failure;Malleation connection can be achieved, discharge well Lower high-pressure fluid function;Can directly it be exchanged with drilling rod, oil pipe and water injection pipe etc., wide adaptation range.
The purpose of the present invention is achieved through the following technical solutions:A kind of storm valve, it includes valve casing, is arranged at valve Top plugging mechanism, bottom plugging mechanism in shell, the screw top of valve casing are connected with tubing string, the bottom of valve casing sequentially screw thread Ring flange and lower tubular column are connected with, scotch is installed with valve casing, connecting cylinder, the top plugging mechanism are interspersed with scotch It is arranged at including top positioning valve seat, top ball-collecting rack valve seat, upper piston, upper piston cylinder and compression spring A, top ball-collecting rack valve seat In connecting cylinder upper shed, top positioning valve seat is arranged between top ball-collecting rack valve seat and valve casing top surface, upper piston cylinder slip cap Outside connecting cylinder, it is installed with upper piston cylinder along the axially arranged rack of valve casing, upper piston is arranged at the top of upper piston cylinder, Formed with upper annular oil cavity between upper piston and valve casing top surface, compression spring A is sheathed on outside connecting cylinder and its both ends is distinguished It is connected on upper piston cylinder and scotch, upper ball valve element is arranged between top positioning valve seat and top ball-collecting rack valve seat, top The both ends of ball valve core are provided with the fixing axle through ball-collecting rack valve seat, and gear, wheel and rack engagement are provided with fixing axle;
The bottom plugging mechanism includes bottom ball-collecting rack valve seat, bottom positioning valve seat, lower ball valve element, lower piston cylinder, bottom work Plug and compression spring B, the upper end set of bottom ball-collecting rack valve seat are fixed in the bottom of connecting cylinder, and bottom positioning valve seat is arranged at bottom Between ball-collecting rack valve seat and ring flange, lower piston cylinder slides the outside for being placed on lower ball frame valve seat, is installed with lower piston cylinder along valve The axially arranged rack of shell, lower piston are arranged at the bottom of lower piston cylinder, formed with lower ring between lower piston and ring flange Shape oil pocket, compression spring B is sheathed on outside the ball-collecting rack valve seat of bottom and its both ends is connected between scotch and lower piston cylinder, The lower ball valve element is arranged between bottom ball-collecting rack valve seat and bottom positioning valve seat, and the both ends of lower ball valve element, which are provided with, wears The fixing axle of ball-collecting rack valve seat is crossed, gear, wheel and rack engagement are installed in fixing axle;
Oil inlet A, oil inlet B and two oil inlet C are provided with the top of the valve casing, oil inlet A connects with upper annular oil cavity, Oil inlet B connects with lower annular oil cavity, the region between one of oil inlet C connection scotch and upper piston cylinder, another Oil inlet C connects the region between scotch and lower piston cylinder;U is offered on described upper ball valve element and lower ball valve element Type groove.
The bottom of described top positioning valve seat is provided with semi-circular hole I, and the top of described top ball-collecting rack valve seat is set There is semi-circular hole II.
Fixing axle on described upper ball valve element is between semi-circular hole I and semi-circular hole II.
It is in arranged for interval to be connected with spring between described bottom positioning valve seat and ring flange.
It is in arranged for interval that spring is connected between described top ball-collecting rack valve seat and connecting cylinder.
Two oil inlet A, two oil inlet B and two oil inlet C are provided with the top of described valve casing.
Described top positioning valve seat is mounted on sealing with valve casing contact position, connecting cylinder and bottom ball-collecting rack valve seat contact position Circle.
Elongated slot and square groove are provided with described upper piston cylinder and lower piston cylinder, square groove is connected with elongated slot, and the rack is set It is placed in elongated slot, gear is arranged in square groove.
Brief description of the drawings
Fig. 1 is the main sectional view of the present invention;
Fig. 2 is the structural representation of valve casing;
Fig. 3 is the structural representation that top positions valve seat;
Fig. 4 is the structural representation of top ball-collecting rack valve seat;
Fig. 5 is the structural representation of upper piston cylinder;
Fig. 6 is the scheme of installation of upper piston cylinder and rack;
Fig. 7 is the structural representation of upper ball valve element;
In figure, 1- valve casings, the upper tubing strings of 2-, 3- ring flanges, 4- lower tubular columns, 5- scotch, 6- connecting cylinders, 7- tops positioning valve seat, 8- tops ball-collecting rack valve seat, 9- upper ball valve elements, 10- upper pistons, 11- upper piston cylinders, 12- compression springs A, 13- rack, 14- Upper annular oil cavity, 15- fixing axles, 16- gears, 17- bottoms ball-collecting rack valve seat, 18- bottoms positioning valve seat, 19- lower ball valve elements, 20- lower piston cylinders, 21- lower pistons, annular oil cavity under 22- compression springs B, 23-, 24- oil inlets A, 25- oil inlet B, 26- Oil inlet C, 27-U type groove, 28- semi-circular holes I, 29- semi-circular hole II, 30- spring, 31- sealing rings, 32- elongated slots, 33- side Groove, 91- through holes a, 191- through hole b.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to as described below:
As shown in Fig. 1 ~ 7, a kind of storm valve, it includes valve casing 1, the top plugging mechanism being arranged in valve casing 1, bottom envelope Stifled mechanism, the screw top of valve casing 1 are connected with tubing string 2, and the bottom of valve casing 1 is sequentially threaded with ring flange 3 and lower tubular column 4, scotch 5 is installed with valve casing 1, connecting cylinder 6 is interspersed with scotch 5, the top plugging mechanism includes top normal valve Seat 7, top ball-collecting rack valve seat 8, upper piston 10, upper piston cylinder 11 and compression spring A12, top ball-collecting rack valve seat 8 are arranged at connection In 6 upper sheds of cylinder, top positioning valve seat 7 is arranged between top ball-collecting rack valve seat 8 and the top surface of valve casing 1, and upper piston cylinder 11 slides It is placed on outside connecting cylinder 6, is installed with along the axially arranged rack 13 of valve casing 1, upper piston 10 and is arranged in upper piston cylinder 11 The top of piston cylinder 11, is sheathed between upper piston 10 and the top surface of valve casing 1 formed with upper annular oil cavity 14, compression spring A12 Connecting cylinder 6 is outer and its both ends is connected on upper piston cylinder 11 and scotch 5, and upper ball valve element 9 is arranged at top normal valve Between seat 7 and top ball-collecting rack valve seat 8, the both ends of upper ball valve element 9 are provided with the fixing axle 15 through ball-collecting rack valve seat, fixing axle Gear 16 is installed, gear 16 engages with rack 13 on 15;
The bottom plugging mechanism includes bottom ball-collecting rack valve seat 17, bottom positioning valve seat 18, lower ball valve element 19, lower piston cylinder 20th, lower piston 21 and compression spring B22, the upper end set of bottom ball-collecting rack valve seat 17 are fixed in the bottom of connecting cylinder 6, and bottom is fixed Position valve seat 18 is arranged between bottom ball-collecting rack valve seat 17 and ring flange 3, and lower piston cylinder 20 slides and is placed on lower ball frame valve seat 17 Outside, it is installed with along the axially arranged rack 13 of valve casing 1, lower piston 21 in lower piston cylinder 20 and is arranged at the bottom of lower piston cylinder 20 Portion, formed with lower annular oil cavity 23 between lower piston 21 and ring flange 3, compression spring B22 is sheathed on bottom ball-collecting rack valve seat 17 Outside and its both ends are connected between scotch 5 and lower piston cylinder 20, and the lower ball valve element 19 is arranged at bottom ball-collecting rack Between valve seat 17 and bottom positioning valve seat 18, the both ends of lower ball valve element 19 are provided with the fixing axle 15 through ball-collecting rack valve seat, Gear 16 is installed, gear 16 engages with rack 13 in fixing axle 15;
The top of the valve casing 1 is provided with oil inlet A24, oil inlet B25 and two oil inlet C26, oil inlet A24 and upper annular Oil pocket 14 connects, and oil inlet B25 connects with lower annular oil cavity 23, one of oil inlet C26 connection scotch 5 and upper piston cylinder Region between 11, the region between another oil inlet C26 connection scotch 5 and lower piston cylinder 20;Described upper ball valve U-type groove 27 is offered on core 9 and lower ball valve element 19.
The bottom of described top positioning valve seat 7 is provided with semi-circular hole I28, the top of described top ball-collecting rack valve seat 8 It is provided with semi-circular hole II29.
Fixing axle 15 on described upper ball valve element 9 is between semi-circular hole I28 and semi-circular hole II29.Described It is in arranged for interval 30 that bottom, which positions and is connected with spring between valve seat 18 and ring flange 3,.Described top ball-collecting rack valve seat 8 and connecting cylinder It is in arranged for interval 30 to connect lower piston cylinder 20 between 6 to be connected to spring.The top of described valve casing 1 be provided with two oil inlet A24 and Two oil inlet B25.Described top positioning valve seat 7 and the contact position of valve casing 1, connecting cylinder 6 and the contact position of bottom ball-collecting rack valve seat 17 It is mounted on sealing ring 31.
Described upper piston cylinder 11 and it is interior be provided with elongated slot 32 and square groove 33, square groove 33 connects with elongated slot 32, the rack 13 are arranged in elongated slot 32, and gear 16 is arranged in square groove 33.
The course of work of the present invention is as follows:Under original state, the top of valve casing 1 is pin thread, tubing string 2 in connection, valve casing 1 Bottom is box, connects lower tubular column 4.When the hydraulic oil being passed through to oil inlet A24 enters in upper annular oil cavity 14, hydraulic oil promotes Upper piston 10 and upper piston cylinder 11 move downwardly together, and in moving process, rack 13 rotates with moving gear 16, so as to drive The smooth rotation of upper ball valve element 9, the one end of compression spring 12 is motionless against scotch 5, and the other end continues to be compressed downwards, until upper Portion's ball valve core 9 is fully opened, and the upper ball valve core 9 for realizing storm valve of the present invention is opened.When the liquid being passed through to oil inlet B25 Force feed enters in lower annular oil cavity 23, promotes lower piston 21 and lower piston cylinder 20 to move upwardly together, in moving process, tooth Bar 13 rotates with moving gear 16, and so as to drive the smooth rotation of lower ball valve element 19, the one end of compression spring 22 abuts scotch 5 not Dynamic, the other end continues to be compressed downwards, until lower ball valve element 19 fully opens, realizes the lower ball of storm valve of the present invention Valve element 19 is opened.When being passed through hydraulic oil simultaneously into oil inlet A24 and oil inlet B25, the process causes the logical of upper ball valve element 9 Hole a91 is connected with the through hole b191 of lower ball valve element 19, realizes fully opening for storm valve of the present invention.Underground of the present invention The core of ball valve up and down of safety valve has the independent function of opening and open simultaneously, and can better meet oil field all kinds of techniques of production will Ask.
In the on state, to oil inlet C26 be passed through hydraulic oil enter region between scotch 5 and upper piston cylinder 11 and Region between scotch 5 and lower piston cylinder 20, hydraulic oil promote upper piston cylinder 11 and upper piston 10 together along connecting cylinder 6 to Upper movement, in moving process, rack 13 rotates with moving gear 16, so as to drive the smooth rotation of upper ball valve element 9, drives top Ball valve core 9 rotates.Hydraulic oil promotes lower piston cylinder 20 and lower piston 21 to move downwardly together, in moving process, rack 13 Band moving gear 16 rotates, so as to drive the smooth rotation of lower ball valve element 19.So that upper ball valve element 9 and lower ball valve element 19 are realized Completely close.In above process, compression spring A12 acts on upper piston cylinder 11, compression spring B22 effects and lower piston cylinder 20, piston movement is further driven, so as to realize the closing assisted of upper ball valve element 9 and lower ball valve element 19, realizes this hair Bright storm valve completely closes.Double ball valve cores of storm valve of the present invention cause the present invention to have dual protection mechanism, The stability of closed mode of the present invention is improved, more reliably blocks underground abnormal pressure fluid.
In closing process, the present invention is internal to have coiled tubing, cable etc. in some operations, so in emergency Under need shear pit shaft internal reasons, complete effective closure to underground high-pressure fluid.From oil inlet C26 to scotch 5 with High pressure liquid force feed is passed through in cavity between lower piston cylinder 20, promotes lower piston 21 and lower piston cylinder 20 to move downwardly together, In moving process, rack 13 rotates with moving gear 16, so as to drive the smooth rotation of lower ball valve element 19, when lower ball valve core 19 After turning an angle, the U-type groove 27 on lower ball valve element 19 cuts internal reasons, it is achieved thereby that underground of the present invention is pacified The shearing function of full valve.The coiled tubing sheared, steel wire or cable of storm valve of the present invention etc., ensure in operation process Urgent closing well during middle generation abnormal conditions, effectively blocks underground high-pressure fluid.
In the on state, if storm valve hydraulic failure, i.e. hydraulic oil do not enter into hydraulic line, in pressure In the presence of the compression spring A12 and compression spring B22 of contracting state, upper ball valve element 9 and lower ball valve element 19 will close automatically Close, close automatically during the hydraulic failure for realizing storm valve of the present invention.The fail-safe mechanisms of storm valve of the present invention, It is automatic to close double ball valve cores, ensure that downhole fluid is in controllable state, be that hydraulic failure plays budget effect under abnormal hole condition.
In the closed state, i.e. when upper and lower ball valve core is in closing.When to the pump of upper through-hole 34 of upper ball valve element 9 Enter highly pressurised liquid, when its pressure exceedes the cavity fluid pressure of connecting cylinder 6 and the pretightning force of spring 30, then what is be closed is upper A bit of displacement occurs downwards for being pumped under high-pressure fluid promotes in upper through-hole 34 of portion's ball valve core 9, and spring 30 is compressed, tooth Wheel 16 realizes that gear 16 rotates with the interaction of rack 13, so that the rotation low-angle of upper ball valve element 9, in upper through-hole 34 High-pressure fluid can position the space between valve seat 7 and top ball-collecting rack valve seat 8 with top by U-type groove 27 and connect connecting cylinder 6.Connect , when top is pumped into high-pressure fluid and lower ball valve element 19 and directly acted on, and its pressure exceedes the bottom of lower ball valve element 19 and led to The pretightning force of the fluid pressure of hole 35 and spring 30, then the lower ball valve element 19 being closed promote in top high-pressure fluid A bit of displacement occurs downwards down, spring 30 is compressed, and gear 16 realizes that gear 16 rotates with the interaction of rack 13, so that Lower ball valve element 19 rotates low-angle, and the high-pressure fluid that top is pumped into can be fixed by U-type groove 27 and bottom ball-collecting rack valve seat 17, bottom Space connection lower through-hole 35 between the valve seat 18 of position.Finally, the storm valve being closed, positive to it(On Portion)One low-angle of ball valve core generation skew up and down is pumped into the presence of high-pressure fluid, so as to realize the connection in whole tubing string(Open Open), realize the malleation connectivity capabilities of storm valve of the present invention.The pump of storm valve of the present invention leads to function, can be with controllable Ground discharges underground high-pressure fluid, operation of quickly and safely resuming production.

Claims (8)

  1. A kind of 1. storm valve, it is characterised in that:It includes valve casing(1), be arranged at valve casing(1)Interior top plugging mechanism, Bottom plugging mechanism, valve casing(1)Screw top be connected with tubing string(2), valve casing(1)Bottom be sequentially threaded with flange Disk(3)And lower tubular column(4), valve casing(1)Inside it is installed with scotch(5), scotch(5)Inside it is interspersed with connecting cylinder(6), the top Plugging mechanism includes top positioning valve seat(7), top ball-collecting rack valve seat(8), upper piston(10), upper piston cylinder(11)With compression bullet Spring A(12), top ball-collecting rack valve seat(8)It is arranged at connecting cylinder(6)In upper shed, top positioning valve seat(7)It is arranged at top ball-collecting rack Valve seat(8)With valve casing(1)Between top surface, upper piston cylinder(11)Slip is placed on connecting cylinder(6)Outside, upper piston cylinder(11)It is interior solid Provided with along valve casing(1)Axially arranged rack(13), upper piston(10)It is arranged at upper piston cylinder(11)Top, upper piston (10)With valve casing(1)Formed with upper annular oil cavity between top surface(14), compression spring A(12)It is sheathed on connecting cylinder(6)It is outer and Its both ends is connected to upper piston cylinder(11)And scotch(5)On, upper ball valve element(9)It is arranged at top positioning valve seat(7) With top ball-collecting rack valve seat(8)Between, upper ball valve element(9)Both ends be provided with the fixing axle through ball-collecting rack valve seat(15)Gu Dead axle(15)On gear is installed(16), gear(16)With rack(13)Engagement;
    The bottom plugging mechanism includes bottom ball-collecting rack valve seat(17), bottom positioning valve seat(18), lower ball valve element(19), lower work Plug tube(20), lower piston(21)With compression spring B(22), bottom ball-collecting rack valve seat(17)Upper end set be fixed in connecting cylinder(6) Bottom, bottom positioning valve seat(18)It is arranged at bottom ball-collecting rack valve seat(17)With ring flange(3)Between, lower piston cylinder(20)It is sliding It is dynamic to be placed on bottom ball-collecting rack valve seat(17)Outside, lower piston cylinder(20)Inside it is installed with along valve casing(1)Axially arranged rack(13), Lower piston(21)It is arranged at lower piston cylinder(20)Bottom, lower piston(21)With ring flange(3)Between formed with lower annular Oil pocket(23), compression spring B(22)It is sheathed on bottom ball-collecting rack valve seat(17)Outside and its both ends are connected to scotch(5)With Lower piston cylinder(20)Between, the lower ball valve element(19)It is arranged at bottom ball-collecting rack valve seat(17)Valve seat is positioned with bottom(18)It Between, lower ball valve element(19)Both ends be provided with the fixing axle through ball-collecting rack valve seat(15), fixing axle(15)Upper installation is with teeth Wheel(16), gear(16)With rack(13)Engagement;
    The valve casing(1)Top be provided with oil inlet A(24), oil inlet B(25)With two oil inlet C(26), oil inlet A (24)With upper annular oil cavity(14)Connection, oil inlet B(25)With lower annular oil cavity(23)Connection, one of oil inlet C(26) Connect scotch(5)With upper piston cylinder(11)Between region, another oil inlet C(26)Connect scotch(5)With lower piston Cylinder(20)Between region;Described upper ball valve element(9)With lower ball valve element(19)On offer U-type groove(27).
  2. A kind of 2. storm valve according to claim 1, it is characterised in that:Described top positioning valve seat(7)Bottom Portion is provided with semi-circular hole I(28), described top ball-collecting rack valve seat(8)Top be provided with semi-circular hole II(29).
  3. A kind of 3. storm valve according to claim 1, it is characterised in that:Described upper ball valve element(9)On consolidate Dead axle(15)Positioned at semi-circular hole I(28)With semi-circular hole II(29)Between.
  4. A kind of 4. storm valve according to claim 1, it is characterised in that:Described bottom positioning valve seat(18)With method Blue disk(3)Between to be connected with spring be in arranged for interval(30).
  5. A kind of 5. storm valve according to claim 1, it is characterised in that:Described top ball-collecting rack valve seat(8)With connecting Connect cylinder(6)Between to be connected with spring be in arranged for interval(30).
  6. A kind of 6. storm valve according to claim 1, it is characterised in that:Described valve casing(1)Top be provided with Two oil inlet A(24)With two oil inlet B(25)With two oil inlet C(26).
  7. A kind of 7. storm valve according to claim 1, it is characterised in that:Described top positioning valve seat(7)With valve Shell(1)Contact position, connecting cylinder(6)With bottom ball-collecting rack valve seat(17)Contact position is mounted on sealing ring(31).
  8. A kind of 8. storm valve according to claim 1, it is characterised in that:Described upper piston cylinder(11)And lower piston Cylinder(20)Inside it is provided with elongated slot(32)And square groove(33), square groove(33)With elongated slot(32)Connection, the rack(13)It is arranged at length Groove(32)It is interior, gear(16)It is arranged at square groove(33)It is interior.
CN201710883093.0A 2017-09-26 2017-09-26 Underground safety valve Active CN107461174B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710883093.0A CN107461174B (en) 2017-09-26 2017-09-26 Underground safety valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710883093.0A CN107461174B (en) 2017-09-26 2017-09-26 Underground safety valve

Publications (2)

Publication Number Publication Date
CN107461174A true CN107461174A (en) 2017-12-12
CN107461174B CN107461174B (en) 2023-07-21

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Application Number Title Priority Date Filing Date
CN201710883093.0A Active CN107461174B (en) 2017-09-26 2017-09-26 Underground safety valve

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CN (1) CN107461174B (en)

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Publication number Priority date Publication date Assignee Title
CN108533775A (en) * 2018-04-27 2018-09-14 林明 A kind of multistage flow safety valve of Petroleum Production
CN110206509A (en) * 2019-05-24 2019-09-06 中国地质科学院地质力学研究所 A kind of water level differential pressure control valve
CN111734318A (en) * 2020-06-30 2020-10-02 合力(天津)能源科技股份有限公司 Multifunctional hydraulic safety device for oil pipe

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108533775A (en) * 2018-04-27 2018-09-14 林明 A kind of multistage flow safety valve of Petroleum Production
CN108533775B (en) * 2018-04-27 2019-10-15 深圳海力德油田技术开发有限公司 A kind of multistage flow safety valve of Petroleum Production
CN110206509A (en) * 2019-05-24 2019-09-06 中国地质科学院地质力学研究所 A kind of water level differential pressure control valve
CN110206509B (en) * 2019-05-24 2022-05-27 中国地质科学院地质力学研究所 Water level differential pressure control valve
CN111734318A (en) * 2020-06-30 2020-10-02 合力(天津)能源科技股份有限公司 Multifunctional hydraulic safety device for oil pipe
CN111734318B (en) * 2020-06-30 2022-01-18 合力(天津)能源科技股份有限公司 Multifunctional hydraulic safety device for oil pipe

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