CN102102500B - Motor-driven worm gear transmission underground sleeve valve - Google Patents
Motor-driven worm gear transmission underground sleeve valve Download PDFInfo
- Publication number
- CN102102500B CN102102500B CN 201010593466 CN201010593466A CN102102500B CN 102102500 B CN102102500 B CN 102102500B CN 201010593466 CN201010593466 CN 201010593466 CN 201010593466 A CN201010593466 A CN 201010593466A CN 102102500 B CN102102500 B CN 102102500B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 21
- 210000002445 nipple Anatomy 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the field of underbalanced drilling in petroleum engineering, in particular to a motor-driven worm gear transmission underground casing valve. The outer side of the eccentric cylinder (5) of the casing valve main body is provided with two elongated slots, namely an electronic chamber (21) and a driving chamber (55), the inner side of the lower half part of the main body eccentric cylinder (5) is provided with a valve tongue switch cylinder (13), an electronic component (22), a printed circuit board (23) and a connecting signal line (25) are arranged in the electronic chamber (21), the middle section of the electronic chamber (21) is provided with two Hall sensors, the upper inner part of the driving chamber (55) is provided with a rubber corrugated pipe framework (42), the rubber corrugated pipe framework (42) is connected with a driving assembly shell (50), and a motor winding connector lug (46), a motor (47), a multi-stage reduction gearbox (48), an upper worm bearing (49) and a mechanical seal assembly (52) are arranged in the driving assembly shell (50) in sequence. The invention realizes simple operation and reduces fault sources.
Description
Technical field:
The present invention relates to a kind of petroleum works under balance pressure drilling field, particularly a kind of motor driven worm gear transmission underground sleeve valve.
Background technology:
The down hole sleeve valve that oil field under balance pressure drilling is at present used, the on-off mode of its clack valve is to connect two hydraulic pressure capillary oil pipelines on the switch hydraulic cavities of down hole sleeve valve by the ground hydraulic switch board, and the operation of facing the hydraulic control cabinet by ground makes a certain logical high pressure of two hydraulic pressure capillary oil pipes realize the opening and closing of clack valve of down hole sleeve valve.Well head operation in the installation process of the down hole sleeve valve of this pattern is all pretty troublesome with down-hole operation.This can cause certain negative effect to normal wellbore construction.On the other hand, capillary line is generally only done the short tube use of several meters long, and the high pressure capillary oil pipeline of therefore nearly km is exactly a high-risk source of trouble in drilling well down-hole use itself.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of motor driven worm gear transmission underground sleeve valve, and this down hole sleeve valve has been realized easy and simple to handle, reduces the source of trouble.Overcome existing down hole sleeve valve troublesome poeration, had the deficiency of the high-risk source of trouble.
the technical solution used in the present invention is: the order screwed connection from top to bottom of a kind of motor driven worm gear transmission underground sleeve valve, casing coupling, upper sleeve pipe nipple, main body eccentric cylinder, bottom urceolus and lower eccentric crossover sub, the outside of main body eccentric cylinder has the electronics chamber and drives two elongated slots of chamber, and be fixed with electronics chamber cover plate and actuator chamber room cover plate, the inboard of main body eccentric cylinder Lower Half is provided with clack valve switch cylinder, main body eccentric cylinder lower end and valve seat gun iron link, valve seat one side external stability has valve seat pivot pin gusset, clack valve is fastened with the clack valve gusset, clack valve gusset and valve seat pivot pin gusset are hinged by the clack valve rotating shaft pin, be connected with torsion spring between clack valve and valve seat, be provided with electronic devices and components in the electronics chamber, printed circuit board (PCB) be connected holding wire, the upper end of electronics chamber is provided with two line outlets, a stube cable wire terminal, another connects motor winding output connection head, the lower end is provided with a line outlet Bonding pressure sensor, have the pressure guide hole on the valve seat corresponding with pressure sensor, the stage casing of electronics chamber is provided with two Hall elements, one, top is clack valve complete shut-down Hall element, one of bottom is clack valve standard-sized sheet Hall element, a side is installed permanent magnet on clack valve switch cylinder, the indoor top of actuator chamber is the rubber bellows skeleton, the rubber bellows skeleton connects the driving assembly shell, the outer surface cover of rubber bellows skeleton has rubber bellows, drive in assembly shell and by the transmission order, motor winding connection head is housed, motor, the multi-stage speed-reducing case, worm screw upper bearing (metal) and mechanical seal assembly, driving chamber upper end is provided with a line outlet and is connected with motor winding input wires head, the worm screw upper end is connected with the worm screw upper bearing (metal) of driving chamber lower end, the lower end is connected with the worm screw lower bearing, the worm tooth of worm screw is meshed with clack valve switch cylinder wrom tooth.
Screwed connection place of bottom urceolus and lower eccentric crossover sub is provided with the anti-rotation spiral pin, lower eccentric crossover sub inboard is provided with clack valve and forever opens seating nipple and corresponding non-return pin assembly, and lower eccentric crossover sub outer upper is provided with lower eccentric crossover sub sealing ring.
Electricity consumption sub-chamber cover plate for sealing circle sealing between electronics chamber and electronics chamber cover plate, electronics chamber cover plate is fastened on the electronics chamber with the cover plate fastening bolt, drive and use the sealing of actuator chamber room cover plate sealing ring between chamber and actuator chamber room cover plate, the actuator chamber room cover plate is fastened on the cover plate fastening bolt and drives on chamber.
Be connected by connecting concrete steel between main body eccentric cylinder lower end and valve seat, valve seat one side is outside fixes valve seat pivot pin gusset with valve seat pivot pin bolt, and clack valve use clack valve gusset bolt is fastening with the clack valve gusset.
Main body eccentric cylinder bottom and valve seat top are provided with respectively main body eccentric cylinder sealing ring and valve seat insert gives seal isolation.
The rubber bellows skeleton is provided with rubber bellows backbone sealing ring and skeleton pressure guide hole, also has pressure guide hole on corresponding main body eccentric cylinder.
Clack valve switch cylinder wrom tooth is one of the outside side setting of clack valve switch cylinder is having certain width that the straight worm gear tooth bar of narrow length that is processed into of length of certain-length is arranged on axially on hoop, corresponding clack valve switch cylinder wrom tooth is processed into a long fillet window and matches on the main body eccentric cylinder that drives between chamber and clack valve switch cylinder, make it to form the relation of key and keyway.
The outer surface cover of the motor winding leads that is connected between motor winding output connection head, motor winding input wires head and motor winding output connection head and motor winding input wires head has one to cross the line protective sleeve; cross and be filled with the dielectric force feed in the line protective sleeve, be filled with insulation lubrication oil in rubber bellows.
the invention has the beneficial effects as follows: the present invention is because the single core cable that has adopted the directional well steering tool to use connects ground and down hole sleeve valve, keyboard or mouse input command are passed through by computer in ground, the clack valve of controlling the down-hole carries out switch motion, while down-hole single-chip computer control system timing sampling pressure sensor, the parameter value of clack valve standard-sized sheet Hall element and clack valve complete shut-down Hall element, and parameter signal is changed by cable issued ground, guarantee that ground-based computer is in the mode of Real Time Monitoring down hole sleeve valve state, thereby have easy and simple to handle, reduce the advantage of the source of trouble.
Description of drawings:
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is power supply of the present invention and signal flow block diagram.
Fig. 2 is Mechanical ﹠ Electrical Transmission FB(flow block) of the present invention.
Fig. 3 is outward appearance top view of the present invention.
Fig. 4 is that the A-A of Fig. 3 is to the cross section constructional drawing.
Fig. 5 is that the B-B of Fig. 3 is to the cross section constructional drawing.
Fig. 6 is that the C-C of Fig. 5 is to the vertical section constructional drawing.
Fig. 7 is that the D-D of Fig. 5 is to the vertical section constructional drawing.
The specific embodiment:
As shown in Figure 1, by keyboard or mouse input command, this command signal reaches the down-hole single-chip computer control system through interface box by cable by ground-based computer in the switch motion of down hole sleeve valve clack valve, simultaneously by interface box with power delivery to downhole system.The down-hole single-chip computer control system sends motor drive signal after receiving the control signal on ground, to control the rotating of motor.While single-chip computer control system timing sampling pressure sensor, the parameter value of clack valve fully open position sensor and clack valve complete shut-down position sensor, and parameter signal is changed by cable issued ground.Keep thus ground-based computer to be in the process of Real Time Monitoring down hole sleeve valve state.
As shown in Figure 2, the motor control signal that the down-hole single-chip computer control system sends is through the oriented rotation of drive circuit rear drive motor, thereby reach by electric power to mechanically operated conversion, what motor shaft was exported is the low torque mechanical force of high rotating speed, must convert slow-speed of revolution large torque mechanical force to through the multi-stage speed-reducing case and go to drive the wrom tooth transmission.On the other hand, by mechanical seal, motor and multi-stage speed-reducing case and wrom tooth running part are separated, guarantee motor and reduction box oil lubrication.The switch of clack valve is made axially reciprocating and clack valve torsion spring by clack valve switch cylinder and is coordinated and to complete, and the wrom tooth transport characteristics is to have self-lock ability and large torque gearratio.
as shown in Fig. 3,4,5,6 and 7, the order screwed connection from top to bottom of casing coupling 1, upper sleeve pipe nipple 2, main body eccentric cylinder 5, bottom urceolus 9 and lower eccentric crossover sub 12, screwed connection place of its middle and lower part urceolus 9 and lower eccentric crossover sub 12 is provided with anti-rotation spiral pin 10, lower eccentric crossover sub 12 inboards are provided with clack valve and forever open seating nipple 39 and corresponding non-return pin assembly 11, and outer upper is provided with lower eccentric crossover sub sealing ring 38, the thicker outside of main body eccentric cylinder 5 has electronics chamber 21 and drives 55 two elongated slots of chamber, and be provided with electronics chamber cover plate 6 and actuator chamber room cover plate 7 and corresponding electronics chamber cover plate sealing ring 18 and actuator chamber room cover plate sealing ring 19 and give inside and outside protective separation and sealing, electronics chamber cover plate 6 and actuator chamber room cover plate 7 all use cover plate fastening bolt 8 fastening, the inboard of main body eccentric cylinder 5 Lower Halves is provided with clack valve switch cylinder 13, main body eccentric cylinder 5 bottoms are connected with valve seat 28 with connecting muscle 30, valve seat 28 1 side outer setting valve seat pivot pin gusset 33, and with valve seat pivot pin bolt 32, that it is fastening, clack valve 37 use clack valve gusset bolts 35 are fastening with clack valve gusset 36, clack valve gusset 36 and valve seat pivot pin gusset 33 are hinged by clack valve rotating shaft pin 54, and force all the time clack valve 37 and valve seat 28 to be in the trend of closing by torsion spring 34, main body eccentric cylinder 5 bottoms and valve seat 28 upper ends are provided with respectively main body eccentric cylinder sealing ring 29 and valve seat insert 31 is isolated, be provided with the connection holding wire 25 that the electronic devices and components 22 of single-chip computer control system are connected with printed circuit board (PCB) and are attached thereto in electronics chamber 21, the upper end of electronics chamber 21 is provided with two line outlets, one connects cable adapter 4, another connects motor winding output connection 20, the lower end is provided with a line outlet and connects pressure sensor 26, being introduced by the pressure guide hole 27 that is located on valve seat 28 by measuring pressure of pressure sensor 26, what measure is the force value of clack valve 37 bottoms, the stage casing of electronics chamber 21 is provided with two Hall elements, one, top is clack valve complete shut-down Hall element 24, one of bottom is clack valve standard-sized sheet Hall element 14, the distance of these two Hall elements is the spacing of clack valve switch cylinder axially-movable just, clack valve complete shut-down Hall element 24 just has a state-change output when clack valve switch cylinder moves upward to the permanent magnet 15 that makes on clack valve switch cylinder 13 and aligns with clack valve complete shut-down Hall element 24, same when clack valve switch cylinder 13 moves downward the permanent magnet 15 that makes on clack valve switch cylinder 13 and aligns with clack valve standard-sized sheet Hall element 14 clack valve standard-sized sheet Hall element 14 just have a state-change and export, driving chamber 55 internal upper parts is rubber bellows skeleton 42, the bottom is the driving assembly shell 50 that is attached thereto, rubber bellows skeleton 42 is provided with rubber bellows backbone sealing ring 41 and skeleton pressure guide hole 43 and outer surface cover rubber bellows 45, also have pressure guide hole 44 on corresponding main body eccentric cylinder 5, drive in assembly shell 50 and by the transmission order, motor winding connection head 46 is housed, motor 47, multi-stage speed-reducing case 48, worm screw upper bearing (metal) 49 and mechanical seal assembly 52, and be provided with and drive assembly shell sealing ring 51, wherein the single-chip computer control system motor control signal that sends in down-hole is through the 47 oriented rotations of drive circuit rear drive motor, thereby reach by electric power to mechanically operated conversion, what motor shaft was exported is the low torque mechanical force of high rotating speed, must convert slow-speed of revolution large torque mechanical force to through multi-stage speed-reducing case 48 and go to drive the wrom tooth transmission.on the other hand, by mechanical seal assembly 52, motor 47 and multi-stage speed-reducing case 48 are separated with the wrom tooth running part, assurance motor 47 and multi-stage speed-reducing case 48 and worm screw upper bearing (metal) 49 are used oil lubrication, skeleton pressure guide hole 43 and the pressure guide hole 44 at the rubber bellows skeleton 42 of rubber bellows 45 correspondences and main body eccentric cylinder 5 places are all located among identical drilling tool water hole pressure inside and outside making rubber bellows 45 inside and outside and motor 47, multi-stage speed-reducing case 48, worm screw upper bearing (metal) 49 and mechanical seal, driving chamber 55 upper ends are provided with a line outlet and are connected with motor winding input wires head 40, worm screw 17 upper ends are connected with the worm screw upper bearing (metal) 49 of driving chamber 55 lower ends, the lower end is connected with worm screw lower bearing 53, on the other hand, the outside side of clack valve switch cylinder 13 is provided with one is having certain width that narrow of the length of certain-length is arranged on axially on hoop, and be processed into long straight worm gear tooth bar, it is clack valve switch cylinder wrom tooth 16, clack valve switch cylinder wrom tooth 16 forms the wrom tooth transmission with the worm tooth engagement, corresponding clack valve switch cylinder wrom tooth 16 is processed into a long fillet window and matches on the main body eccentric cylinder 5 that drives between chamber 55 and clack valve switch cylinder 13, make it to form the relation of key and keyway, the self-lock ability that adds the wrom tooth transmission make clack valve switch cylinder 13 axially and hoop can vibration and rotation, this design feature make drilling tool rotation or on put and can not make clack valve switch cylinder 13 produce unnecessary involuntary maneuvers to the frictional resistance effect of clack valve switch cylinder 13 inwalls because of drilling tool in letting slip journey.
The present invention self has the permanent unlatching of clack valve 37 and auto-lock function.When this function breaks down need to be by force during permanent opening valve flap valve tongue 37, can be lowered to special tool and first open clack valve 37, block again clack valve and forever open seating nipple 39 inwalls, on carry and be sold back to a grain-producing area to end assembly more than 11, the pin of non-return pin assembly 11 is opened block clack valve and forever opened seating nipple 39, can complete the permanent unlatching of clack valve 37.Non-return pin assembly 11 can arrange a plurality of in the axial direction.
Claims (8)
1. motor driven worm gear transmission underground sleeve valve, comprise casing coupling (1), upper sleeve pipe nipple (2), main body eccentric cylinder (5), bottom urceolus (9) and lower eccentric crossover sub (12), the order screwed connection from top to bottom of casing coupling (1), upper sleeve pipe nipple (2), main body eccentric cylinder (5), bottom urceolus (9) and lower eccentric crossover sub (12), it is characterized in that: the outside of main body eccentric cylinder (5) has electronics chamber (21) and drives (55) two elongated slots of chamber, and be fixed with electronics chamber cover plate (6) and actuator chamber room cover plate (7), the inboard of main body eccentric cylinder (5) Lower Half is provided with clack valve switch cylinder (13), main body eccentric cylinder (5) lower end and valve seat (28) gun iron link, valve seat (28) one side external stabilities have valve seat pivot pin gusset (33), clack valve (37) is fastened with clack valve gusset (36), clack valve gusset (36) and valve seat pivot pin gusset (33) are hinged by clack valve rotating shaft pin (54), be connected with torsion spring (34) between clack valve (37) and valve seat (28), be provided with electronic devices and components (22) in electronics chamber (21), printed circuit board (PCB) (23) be connected holding wire (25), the upper end of electronics chamber (21) is provided with two line outlets, a stube cable wire terminal (4), another connects motor winding output connection head (20), the lower end of electronics chamber (21) is provided with a line outlet Bonding pressure sensor (26), have pressure guide hole (27) on the valve seat (28) corresponding with pressure sensor (26), the stage casing of electronics chamber (21) is provided with two Hall elements, one, top is clack valve complete shut-down Hall element (24), one of bottom is clack valve standard-sized sheet Hall element (14), in the upper side of clack valve switch cylinder (13), permanent magnet (15) is installed, driving chamber (55) internal upper part is rubber bellows skeleton (42), rubber bellows skeleton (42) connects driving assembly shell (50), the outer surface cover of rubber bellows skeleton (42) has rubber bellows (45), drive in assembly shell (50) and by the transmission order, motor winding connection head (46) is housed, motor (47), multi-stage speed-reducing case (48), worm screw upper bearing (metal) (49) and mechanical seal assembly (52), driving chamber (55) upper end is provided with a line outlet and is connected with motor winding input wires head (40), worm screw (17) upper end is connected with the worm screw upper bearing (metal) (49) of driving chamber (55) lower end, worm screw (17) lower end is connected with worm screw lower bearing (53), the worm tooth of worm screw (17) is meshed with clack valve switch cylinder wrom tooth (16).
2. according to down hole sleeve valve claimed in claim 1, it is characterized in that: screwed connection place of described bottom urceolus (9) and lower eccentric crossover sub (12) is provided with anti-rotation spiral pin (10), lower eccentric crossover sub (12) inboard is provided with clack valve and forever opens seating nipple (39) and corresponding non-return pin assembly (11), and lower eccentric crossover sub (12) outer upper is provided with lower eccentric crossover sub sealing ring (38).
3. according to down hole sleeve valve claimed in claim 1, it is characterized in that: electricity consumption sub-chamber's cover plate for sealing circle (18) sealing between described electronics chamber (21) and electronics chamber cover plate (6), electronics chamber cover plate (6) is fastened on electronics chamber (21) with cover plate fastening bolt (8), drive and use actuator chamber room cover plate sealing ring (19) sealing between chamber (55) and actuator chamber room cover plate (7), actuator chamber room cover plate (7) is fastened on cover plate fastening bolt (8) and drives on chamber (55).
4. according to down hole sleeve valve claimed in claim 1, it is characterized in that: pass through to connect muscle (30) gun iron link between described main body eccentric cylinder (5) lower end and valve seat (28), valve seat (28) one sides are outside fixing with valve seat pivot pin gusset (33) with valve seat pivot pin bolt (32), and clack valve (37) is fastening with clack valve gusset (36) with clack valve gusset bolt (35).
5. according to down hole sleeve valve claimed in claim 1, it is characterized in that: described main body eccentric cylinder (5) bottom and valve seat (28) top are provided with respectively main body eccentric cylinder sealing ring (29) and valve seat insert (31) gives seal isolation.
6. according to down hole sleeve valve claimed in claim 1, it is characterized in that: described rubber bellows skeleton (42) is provided with rubber bellows backbone sealing ring (41) and skeleton pressure guide hole (43), also has pressure guide hole (44) on corresponding main body eccentric cylinder (5).
7. according to down hole sleeve valve claimed in claim 1, it is characterized in that: described clack valve switch cylinder wrom tooth (16) is one of the outside side setting of clack valve switch cylinder (13) is having certain width that the straight worm gear tooth bar of narrow length that is processed into of length of certain-length is arranged on axially on hoop, corresponding clack valve switch cylinder wrom tooth (16) is processed into a long fillet window and matches on the main body eccentric cylinder (5) that drives between chamber (55) and clack valve switch cylinder (13), make it to form the relation of key and keyway.
8. according to down hole sleeve valve claimed in claim 1; it is characterized in that: the outer surface cover of the motor winding leads that is connected between described motor winding output connection head (20), motor winding input wires head (40) and motor winding output connection head (20) and motor winding input wires head (40) has one to cross line protective sleeve (3); cross in line protective sleeve (3) and be filled with the dielectric force feed, rubber bellows is filled with insulation lubrication oil in (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010593466 CN102102500B (en) | 2010-12-17 | 2010-12-17 | Motor-driven worm gear transmission underground sleeve valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010593466 CN102102500B (en) | 2010-12-17 | 2010-12-17 | Motor-driven worm gear transmission underground sleeve valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102500A CN102102500A (en) | 2011-06-22 |
| CN102102500B true CN102102500B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010593466 Expired - Fee Related CN102102500B (en) | 2010-12-17 | 2010-12-17 | Motor-driven worm gear transmission underground sleeve valve |
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| Country | Link |
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| CN (1) | CN102102500B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493785A (en) * | 2011-12-02 | 2012-06-13 | 中国石油集团长城钻探工程有限公司 | Automatic control sleeve valve |
| CN103104217B (en) * | 2013-02-06 | 2015-07-08 | 北京六合伟业科技股份有限公司 | Drilling following cable underground hydraulic control sleeving valve |
| US10725442B2 (en) * | 2014-09-12 | 2020-07-28 | Fisher-Rosemount Systems, Inc. | Methods and apparatus to communicatively couple on/off valves to controllers in a process control system |
| CN107676079B (en) * | 2017-11-14 | 2020-08-14 | 北京盛锐马科技有限公司 | Microminiature high integration shear type mud pulser control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426013Y (en) * | 2000-04-17 | 2001-04-04 | 大庆石油管理局钻井研究所 | Hydraulic controlled casing valve for well cementing |
| CN2697310Y (en) * | 2004-04-22 | 2005-05-04 | 新疆石油管理局钻井工艺研究院 | Under-balance downhole casing-valve |
| CN2698966Y (en) * | 2004-05-26 | 2005-05-11 | 中国石化集团胜利石油管理局钻井工艺研究院 | Hydraulic down-hole casing valve for under balance drilling |
| CN200964826Y (en) * | 2006-11-08 | 2007-10-24 | 新疆石油管理局钻井工艺研究院 | Under-balanced downhole casing valve capable of permanently locking |
-
2010
- 2010-12-17 CN CN 201010593466 patent/CN102102500B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426013Y (en) * | 2000-04-17 | 2001-04-04 | 大庆石油管理局钻井研究所 | Hydraulic controlled casing valve for well cementing |
| CN2697310Y (en) * | 2004-04-22 | 2005-05-04 | 新疆石油管理局钻井工艺研究院 | Under-balance downhole casing-valve |
| CN2698966Y (en) * | 2004-05-26 | 2005-05-11 | 中国石化集团胜利石油管理局钻井工艺研究院 | Hydraulic down-hole casing valve for under balance drilling |
| CN200964826Y (en) * | 2006-11-08 | 2007-10-24 | 新疆石油管理局钻井工艺研究院 | Under-balanced downhole casing valve capable of permanently locking |
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| CN102102500A (en) | 2011-06-22 |
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