CN2603846Y - Superpressure hydraulic control reversing slide valve - Google Patents
Superpressure hydraulic control reversing slide valve Download PDFInfo
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- CN2603846Y CN2603846Y CN 02288067 CN02288067U CN2603846Y CN 2603846 Y CN2603846 Y CN 2603846Y CN 02288067 CN02288067 CN 02288067 CN 02288067 U CN02288067 U CN 02288067U CN 2603846 Y CN2603846 Y CN 2603846Y
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Abstract
An ultra-high pressure hydraulic control reversal spool valve relates to reversing valve for petroleum underground tool, which solves the conventional soft sealing technology problems of ultra-high pressure, high temperature, high pollution and water medium; the utility model comprises a valve body(1), a sliding reversing mechanism(2), a hydraulic control mechanism(3) and a spring expansion mechanism(4); the reversing mechanism(2) comprises combination valve sleeves(21,22,23,24,25) and a valve core(26), as adopting an original combination groove structure(252,2624,2614), the utility model can use conventional soft sealing technology, that is a standard O-ring(252) to seal and realize that the cyclic reversing and reduction of the hydraulic control spool valve are reliably finished by clear water; the spool valve is particularly useful on the control of downhole tools, meets the service conditions of downhole high pressure, high temperature and high pollution, can prevent the cut wound and extrusion of the sealing ring(252), so the utility model has the advantages of strong pressure-resistant, high reliability, long service life, reduction of machining accuracy and tolerance requirement of spool valve, improvement of sewage tolerance ability and anti-jamming, etc.
Description
Technical field the utility model relates to a kind of oil oil gas well downhole tool reversal valve, particularly can satisfy operating modes such as down-hole high temperature, high pressure, high pollution and can use the liquid controlled reversing guiding valve of special medias such as clear water.
Technical background is in existing hydraulic technique, and reversing slide valve adopts clearance seal more, owing to use the bigger hydraulic oil of viscosity, seal clearance can be done more greatly, and the clearance seal guiding valve is widely used.But in the control system of using water medium, because dielectric viscosity is low, for guaranteeing sealing effectiveness, must select minimum seal clearance for use when adopting the clearance seal sliding valve structure, in the extra high voltage system more than 40MPa, the seal clearance of requirement is littler.Therefore, the clearance seal guiding valve that under similar applications, uses, not only requirement on machining accuracy is high, to the performance of medium with filter and require also extremely harshly, but also exists problems such as responsive to temperatures, the cost height, realizes that difficulty is big, condition of compatibility is limited.U.S. Pat 4928757 has provided a kind of reversing slide valve structure that adopts soft seal, reset by pressure control commutation, spring control, can adapt to the water medium condition, can satisfy the control requirement that downhole tool is worked under the environment of high temperature, high pressure, easily pollution.But this structural requirement uses special sealing ring, and structure is huge.Summary of the invention goal of the invention of the present utility model is need satisfy super-pressure at the oil downhole tool with the liquid controlled reversing guiding valve, the service condition of high temperature and high pollution and the requirement that needs to use special medias such as clear water, exist to need use defectives such as special sealing ring and structure be huge at prior art, solve the liquid controlled reversing guiding valve and using special media such as clear water and at super-pressure, conventional soft seal technical barrier under high temperature and the high pollution service condition, to improve the reliability and the application life of soft seal, and simplify product structure and reduce production costs, thereby provide the optimized super-pressure liquid controlled reversing of a kind of functional structure guiding valve.
Goal of the invention of the present utility model is by innovating a kind of combination groove structure that adopts conventional soft seal technology just can satisfy super-pressure, high temperature and high pollution service condition, by developing a kind of conventional soft seal slip changement simple in structure and utilizing special media such as clear water to carry out that hydraulic control commutation and the technical scheme that resets realize, its concrete technical scheme is:
The utlity model has cylinder valve, conventional soft seal slip changement, hydraulic control and telescopic spring mechanism; The slip changement is inserted in the cylinder of valve body, and hydraulic control is installed in an end of valve body; Telescopic spring mechanism is installed in the other end of valve body; Under the elastic force acting in conjunction of the hydraulic coupling of hydraulic control and telescopic spring mechanism, the spool of slip changement reciprocatingly slide the circulation commutation that realizes guiding valve with reset;
Have a plurality of on the cylinder sides of valve body of the present utility model as 5 liquid flow holes, the one end has little caliber inner screw thread, and its other end has big caliber inner screw thread;
Conventional soft seal slip changement of the present utility model is made of combination valve pocket and spool, and the combination valve pocket is made up of as 2 baffle rings as 3 valve pockets and respective numbers a plurality of; Valve pocket is a cylinder, has the common annular groove of installation code O shape circle on its urceolus face, has the dovetail shaped annular groove of installation code O shape circle on its inner core face, has liquid flow hole between its inside and outside tube face, and the inner core mask of middle valve pocket has ring cavity; Baffle ring is a cylinder, and they are between two adjacent valve pockets, and the interior round mouth at its two ends has flange, and the inner core mask between two flange openings has the ring cavity of diameter greater than valve core diameter, is evenly equipped with a plurality of as 4 liquid flow holes between urceolus face middle part circumference and the ring cavity; Spool is a cylinder, have a plurality of on its cylinder as 4 band arc transition small inclinations as 15.The liquid stream annular groove of groove along the circumferential direction is evenly equipped with a plurality of on the cylinder of liquid stream annular groove one side as 4 liquid stream flutes, and liquid stream flute has the platform of band small inclination as 15 ° of gradients, and flute one end and annular groove join, and the flute degree of depth is greater than the annular groove degree of depth; The combination valve pocket is relative with valve body static, and the liquid flow hole of the two is corresponding one by one; Spool can reciprocatingly slide in the combination valve pocket, adopt the standard seal with O ring between spool and the valve pocket, when the liquid stream flute of spool slides into the position of O shape circle in the valve pocket, the relevant liquid stream flute and the liquid stream annular groove of spool just form fluid course, the combination groove structure of Here it is the utility model innovation, the ring cavity of the groove of spool and the liquid flow hole of valve pocket and baffle ring and liquid flow hole match and realize circulation commutation of the present utility model and reset;
Hydraulic control of the present utility model is made of hydraulic cylinder, hydraulic piston and hydraulic pressure end socket; Hydraulic cylinder is a cylinder, it is inserted in the cylinder of valve body, the upper and lower part of its cylinder has O shape circle annular groove, the middle part has symmetrical hydraulic pressure hole, has liquid stream annular groove on the cylinder at place, hydraulic pressure hole, the position of liquid flow hole is corresponding on the position in hydraulic pressure hole and the valve body, and one end center to hydraulic pressure hole has the hydraulic piston hole; Hydraulic piston is a cylinder, and its diameter is less than valve core diameter; The hydraulic pressure end socket is a cylinder, and the one end has external screw thread, and its other end is spanner side, and its male end is threaded with the path female end of valve body;
Telescopic spring of the present utility model mechanism is made of housing, spring, spring slide plate, spring slide bar, slide bar cylinder sleeve, spring seat board and lifting end socket; Housing is a cylinder, and its male end is threaded with the big caliber inner screw thread end of valve body, and its female end is threaded with lifting end socket male end, and its middle part has liquid flow hole; The slide bar cylinder sleeve inserts valve body inner bore, and its flange disk cooperates with the round platform rank of the installation housing of valve body, has a plurality of on its casing wall as 2 liquid flow holes; The lifting end socket has center screw, and lifting bolt, lifting bolt adjustable springs elastic force are installed in the center screw.
The utility model is than prior art, owing to the conventional soft seal slip changement with original creation, the combination valve pocket of the changement that particularly slides has adopted the dovetail shaped annular groove of installation code O shape circle and spool to adopt the liquid stream annular groove of being with arc transition small inclination groove and the liquid stream flute of being with small inclination gradient platform and realized the functional structure optimization; The combination valve pocket adopts dovetail shaped O shape circle annular groove can utilize standard O shape circle to realize soft seal to super-pressure, water medium, can prevent that sealing ring from extruding and improve its voltage endurance capability, can reduce machining accuracy and cooperate to require and improve durability against pollution and prevent jam; Spool adopts the combination groove structure of the liquid stream flute of the liquid stream annular groove of band arc transition small inclination groove and band small inclination gradient platform, in the time of can reducing commutation groove by the resistance of sealing ring, the incised wound that prevents sealing ring with extrude, improve sealing life; The coupling of the location parameter of spool stroke and groove, the positiver sealing when having guaranteed to reset and finish effective vent latus rectum after the commutation; Utilize clearance seal to form throttling in the commutation process, make commutation softer, also reduced the pressure reduction of sealing ring front and back, can further eliminate the unfavorable factor that sealing ring is extruded, hurt; Utilize operating pressure control commutation and reset, thereby the function of conventional pressure-control valve and reversal valve is integrated in one; The coupling of the structural parameters of hydraulic control and telescopic spring mechanism has guaranteed to realize regular event under 80MPa super-pressure pressure, has reduced the requirement to physical dimension and intensity; Work stressor is taken from pressure control source, has realized by regulating the function of pump outlet pressure control commutation action.
Description of drawings: the utility model has adopted five width of cloth accompanying drawings, promptly
Fig. 1 is the structural representation of the utility model under reset mode;
Fig. 2 is the structural representation of the utility model under commutation states;
Fig. 3 is that part section I is the combination groove structure schematic diagram of valve pocket and spool among Fig. 2;
Fig. 4 is that part section II is the dovetail shaped O shape circle annular groove schematic diagram of valve pocket among Fig. 3;
Fig. 5 is that A-A is the groove structure schematic diagram of spool to part section among Fig. 3.
The specific embodiment: summary of the invention of the present utility model further is described as follows in detail by the following examples and accompanying drawing thereof:
See figures.1.and.2, the utility model is made of cylinder valve (1), conventional soft seal slip changement (2), hydraulic control (3) and telescopic spring mechanism (4); Slip changement (2) is inserted in the cylinder of valve body (1), and hydraulic control (3) is installed in an end of valve body (1), and telescopic spring mechanism (4) is installed in the other end of valve body (1); Under the elastic force acting in conjunction of the fluid power of hydraulic control (3) and telescopic spring mechanism (4), the spool (26) of slip changement (2) reciprocatingly slide the circulation commutation that realizes valve with reset.
See figures.1.and.2, have a plurality of on the cylinder sides of valve body of the present utility model (1) as 5 liquid flow holes (K, L1, A, P, B), the one end has little caliber inner screw thread, and its other end has big caliber inner screw thread.
With reference to Fig. 1～Fig. 5, conventional soft seal slip changement of the present utility model (2) is made of combination valve pocket (21,22,23,24,25) and spool (26), and combination valve pocket (21,22,23,24,25) is made up of as 2 baffle rings (22,24) as 3 valve pockets (21,23,25) and respective numbers a plurality of; Valve pocket (21,23,25) is a cylinder, has the common annular groove (211 of installation code O shape circle on its urceolus face; 231; 232; 251) the dovetail shaped annular groove (212 that, has installation code O shape circle on its inner core face; 233,234; 252), have liquid flow hole (235,253) between its inside and outside tube face, the inner core mask of middle valve pocket (23) has ring cavity (236); Baffle ring (22,24) is a cylinder, the interior round mouth (221,222 at its two ends; 241,242) has flange, two flange openings (221,222; 241, the inner core 242) is that diameter is greater than flange openings (221,222; 241, the 242) ring cavity of diameter (223,243) is evenly equipped with a plurality of as 4 liquid flow holes (224 between urceolus face middle part circumference and the ring cavity (223,243); 244); Spool (26) is a cylinder, have a plurality of on its cylinder as 4 liquid stream annular grooves (2611 of being with the arc transition small inclination as 15 ° of grooves, 2612,2613,2614), liquid stream annular groove (2611,2612,2613,2614) along the circumferential direction be evenly equipped with a plurality of on the cylinder of a side as 4 liquid stream flutes (2621,2622,2623,2624), liquid stream flute (2621,2622,2623,2624) have the platform (2631 of band small inclination as 15 ° of gradients, 2632,2633,2634), flute (2621,2622,2623,2624) end and annular groove (2611,2612,2613,2614) join, the flute degree of depth is greater than the annular groove degree of depth; The combination valve pocket (21,22,23,24,25) relative static with valve body (1), the liquid flow hole of the two (235, P; 253, L1) corresponding one by one; Spool (26) can reciprocatingly slide in combination valve pocket (21,22,23,24,25), adopt the standard seal with O ring between spool (26) and the valve pocket (21,23,25), when the liquid stream flute (2621,2622,2623,2624) of spool (26) slided into the position of O shape circle (212,233,234,252) in the valve pocket (21,23,25), the related fluid stream flute (2621,2622,2623,2624) and the liquid stream annular groove (2611,2612,2613,2614) of spool (26) just formed fluid course; The liquid stream groove (2621,2622,2623,2624 of spool (26); 2611,2612,2613,2614) match, can realize the circulation commutation of guiding valve and reset with the liquid flow hole (224,235,244,253) of combination valve pocket (21,22,23,24,25) and the liquid flow hole (L1, A, P, B) of ring cavity (223,236,243), valve body (1).
See figures.1.and.2, hydraulic control of the present utility model (3) is made of hydraulic cylinder (31), hydraulic piston (32) and hydraulic pressure end socket (33); Hydraulic cylinder (31) is a cylinder, it is inserted in the cylinder of valve body (1), on its cylinder, the bottom has O shape circle annular groove (311,312), the middle part has symmetrical hydraulic pressure hole (313), has liquid stream annular groove (314) on the cylinder that hydraulic pressure hole (313) is located, the position in hydraulic pressure hole (313) is corresponding with the position that valve body (1) is gone up liquid flow hole (K), one end center to hydraulic pressure hole (313) have hydraulic piston hole (315): hydraulic piston (32) is a cylinder, its diameter is less than spool (26) diameter, and its middle part has the annular groove (321) of installation code O shape circle; Hydraulic pressure end socket (33) is a cylinder, and the one end has external screw thread, and its other end is spanner side, and its male end is threaded with the path female end of valve body (1).
See figures.1.and.2, telescopic spring mechanism of the present utility model (4) is made of housing (41), spring (42), spring slide plate (43), spring slide bar (44), slide bar cylinder sleeve (45), spring seat board (46) and lifting end socket (47); Housing (41) is a cylinder, and its male end is threaded with the big caliber inner screw thread end of valve body (1), and its female end is threaded with lifting end socket (47) male end, and its middle part has liquid flow hole (L2); Slide bar cylinder sleeve (45) inserts in the cylinder of valve body (1), and its flange disk (451) cooperates with the round platform rank of the installation housing (41) of valve body (1), has a plurality of on its casing wall as 2 liquid flow holes (452); Lifting end socket (47) has center screw (471), and lifting bolt (472), lifting bolt (472) adjustable springs (42) elastic force are installed in the center screw (471).
The course of work of the present utility model is as follows:
The control hydraulic power source is connected to the K mouth of valve body (1), and the working solution potential source is connected to the P mouth of valve body (1).
With reference to Fig. 1, when controlled pressure hydraulic coupling during less than spring force, guiding valve is in reset mode, and spool (26) is in reset position.At this moment, operating pressure liquid enters executing agency such as fluid cylinder outside the guiding valve by the P mouth of valve body (1) behind the A mouth of the ring cavity (243) of the annular groove (2613) of the liquid flow hole (235) of valve pocket (23) and ring cavity (236), spool (26) and flute (2623), baffle ring (24) and liquid flow hole (244), valve body (1); Operating pressure liquid in executing agency such as the fluid cylinder is discharged through flute (2621) and annular groove (2611), the liquid flow hole (452) of slide bar cylinder sleeve (45), the peripheral clearance of spring slide plate (43), the liquid flow hole (L2) of housing (41) of the liquid flow hole (224) of baffle ring (22) and ring cavity (223), spool (26) by the B mouth of valve body (1).
With reference to Fig. 2, when the controlled pressure hydraulic coupling was elevated to the commutation pressure of guiding valve gradually, guiding valve was in commutation states, and spool (26) is in commutation position.At this moment, the P mouth of valve body (1) and the fluid course between the A mouth (235,236; 2613,2623; 243,244) by standard O shape circle (234) seal isolation; Operating pressure liquid enters executing agency such as fluid cylinder outside the guiding valve by the P mouth of valve body (1) behind the B mouth of the ring cavity (223) of the annular groove (2612) of the liquid flow hole (235) of valve pocket (23) and ring cavity (236), spool (26) and flute (2622), baffle ring (22) and liquid flow hole (224), valve body (1); Operating pressure liquid in executing agency such as the fluid cylinder is discharged through flute (2624) and annular groove (2614), the liquid flow hole (253) of valve pocket (25) and the L1 mouth of valve body (1) of the liquid flow hole (244) of baffle ring (24) and ring cavity (243), spool (26) by the A mouth of valve body (1).
See figures.1.and.2, the controlled pressure liquid of guiding valve and operating pressure liquid can be selected same pressure liquid source for use, can finish the commutation and the reseting procedure of guiding valve circularly by the pressure of regulating pressure liquid source, thereby reach the purpose of control executing agency do action, this working method is particularly useful to the control of downhole tool etc.
Claims (9)
1, a kind of super-pressure liquid controlled reversing guiding valve, have cylinder valve (1), hydraulic control (3) and telescopic spring mechanism (4), it is characterized in that having conventional soft seal slip changement (2), slip changement (2) is inserted in the cylinder of valve body (1), hydraulic control (3) is installed in an end of valve body (1), and telescopic spring mechanism (4) is installed in the other end of valve body (1); Under the elastic force acting in conjunction of the hydraulic coupling of hydraulic control (3) and telescopic spring mechanism (4), the spool (26) of slip changement (2) reciprocatingly slide the circulation commutation that realizes guiding valve with reset.
2, according to the described guiding valve of claim 1, it is characterized in that having a plurality of as 5 liquid flow holes (K, L1, A, P, B) on the cylinder sides of valve body (1), the one end has little caliber inner screw thread, and its other end has big caliber inner screw thread.
3,, it is characterized in that conventional soft seal slip changement (2) is made of combination valve pocket (21,22,23,24,25) and spool (26) according to the described guiding valve of claim 1; The combination valve pocket (21,22,23,24,25) relative static with valve body (1), the liquid flow hole of the two (235, P; 253, L1) corresponding one by one; Spool (26) can reciprocatingly slide in combination valve pocket (21,22,23,24,25).
4, according to the described guiding valve of claim 1, the combination valve pocket (21,22,23,24,25) that it is characterized in that conventional soft seal slip changement (2) is made up of as 2 baffle rings (22,24) as 3 valve pockets (21,23,25) and respective numbers a plurality of, and baffle ring (22,24) is positioned at adjacent two valve pockets (21,23; 23,25).
5, according to the described guiding valve of claim 1, it is characterized in that the valve pocket (21,23,25) of conventional soft seal slip changement (2) is a cylinder, have the common annular groove (211 of installation code O shape circle on its urceolus face; 231,232; 251) the dovetail shaped annular groove (212 that, has installation code O shape circle on its inner core face; 233,234; 252), have liquid flow hole (235,253) between its inside and outside tube face, the inner core mask of middle valve pocket (23) has ring cavity (236).
6, according to the described guiding valve of claim 1, the baffle ring (22,24) that it is characterized in that conventional soft seal slip changement (2) is a cylinder, the interior round mouth at its two ends (221,222; 241,242) has flange, two flange openings (221,222; 241, the inner core mask 242) has the ring cavity (223,243) of diameter greater than spool (26) diameter, is evenly equipped with a plurality of as 4 liquid flow holes (224 between urceolus face middle part circumference and the ring cavity (223,243); 244).
7, according to the described guiding valve of claim 1, the spool (26) that it is characterized in that conventional soft seal slip changement (2) is a cylinder, have a plurality of on its cylinder as 4 liquid stream annular grooves (2611 of being with the arc transition small inclination as 15 ° of grooves, 2612,2613,2614), liquid stream annular groove (2611,2612,2613,2614) along the circumferential direction be evenly equipped with a plurality of on the cylinder of a side as 4 liquid stream flutes (2621,2622,2623,2624), liquid stream flute (2621,2622,2623,2624) have the platform (2631 of band small inclination as 15 ° of gradients, 2632,2633,2634), flute (2621,2622,2623,2624) end and annular groove (2611,2612,2613,2614) join, the flute degree of depth is greater than the annular groove degree of depth; Adopt the standard seal with O ring between spool (26) and the valve pocket (21,23,25), the liquid stream flute (2621,2622,2623,2624) of spool (26) slides into the position of the interior O shape circle of valve pocket (21,23,25) (212,233,234,252), and the related fluid stream flute (2621,2622,2623,2624) and the liquid stream annular groove (2611,2612,2613,2614) of spool (26) just form fluid course; The liquid stream groove (2621,2622,2623,2624 of spool (26); 2611,2612,2613,2614) match, can realize the circulation commutation of guiding valve and reset with the liquid flow hole (224,235,244,253) of combination valve pocket (21,22,23,24,25) and the liquid flow hole (L1, A, P, B) of ring cavity (223,236,243), valve body (1).
8,, it is characterized in that hydraulic control (3) is made of hydraulic cylinder (31), hydraulic piston (32) and hydraulic pressure end socket (33) according to the described guiding valve of claim 1; Hydraulic cylinder (31) is a cylinder, it is inserted in the cylinder of valve body (1), the upper and lower part of its cylinder has O shape circle annular groove (311,312), the middle part has symmetrical hydraulic pressure hole (313), has liquid stream annular groove (314) on the cylinder that hydraulic pressure hole (313) is located, the position in hydraulic pressure hole (313) is corresponding with the position that valve body (1) is gone up liquid flow hole (K), and one end center to hydraulic pressure hole (313) have hydraulic piston hole (315); Hydraulic piston (32) is a cylinder, and its diameter is less than spool (26) diameter, and its middle part has the annular groove (321) of installation code O shape circle; Hydraulic pressure end socket (33) is a cylinder, and the one end has external screw thread, and its other end is spanner side, and its male end is threaded with the path female end of valve body (1).
9,, it is characterized in that telescopic spring mechanism (4) is made of housing (41), spring (42), spring slide plate (43), spring slide bar (44), slide bar cylinder sleeve (45), spring seat board (46) and lifting end socket (47) according to the described guiding valve of claim 1; Housing (41) is a cylinder, and its male end is threaded with the big caliber inner screw thread end of valve body (1), and its female end is threaded with lifting end socket (47) male end, and its middle part has liquid flow hole (L2); Slide bar cylinder sleeve (45) inserts in the cylinder of valve body (1), and its flange disk (451) cooperates with the round platform rank of the installation housing (41) of valve body (1), has a plurality of on its casing wall as 2 liquid flow holes (452); Lifting end socket (47) has center screw (471), and lifting bolt (472), lifting bolt (472) adjustable springs (42) elastic force are installed in the center screw (471).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288067 CN2603846Y (en) | 2002-11-26 | 2002-11-26 | Superpressure hydraulic control reversing slide valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288067 CN2603846Y (en) | 2002-11-26 | 2002-11-26 | Superpressure hydraulic control reversing slide valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2603846Y true CN2603846Y (en) | 2004-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02288067 Expired - Fee Related CN2603846Y (en) | 2002-11-26 | 2002-11-26 | Superpressure hydraulic control reversing slide valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2603846Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354499C (en) * | 2005-09-29 | 2007-12-12 | 中国海洋石油总公司 | Automatic switching three-way circulation joint for oil well |
| WO2008043300A1 (en) * | 2006-09-28 | 2008-04-17 | Accelergy Shanghai R & D Center Co., Ltd. | Valve suitable for high pressure applications |
| CN104454797A (en) * | 2014-11-27 | 2015-03-25 | 冯广建 | Sequence hydraulic controller of hydraulic control system |
| CN107975365A (en) * | 2017-10-26 | 2018-05-01 | 中国石油天然气集团公司 | Simulate the experimental provision and experimental method of gas condensate reservoir straight well |
-
2002
- 2002-11-26 CN CN 02288067 patent/CN2603846Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354499C (en) * | 2005-09-29 | 2007-12-12 | 中国海洋石油总公司 | Automatic switching three-way circulation joint for oil well |
| WO2008043300A1 (en) * | 2006-09-28 | 2008-04-17 | Accelergy Shanghai R & D Center Co., Ltd. | Valve suitable for high pressure applications |
| CN104454797A (en) * | 2014-11-27 | 2015-03-25 | 冯广建 | Sequence hydraulic controller of hydraulic control system |
| CN107975365A (en) * | 2017-10-26 | 2018-05-01 | 中国石油天然气集团公司 | Simulate the experimental provision and experimental method of gas condensate reservoir straight well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA PETROLEUM GROUP DRILLING ENGINEERING TECHNOL Free format text: FORMER NAME OR ADDRESS: JIANGHAN MECHANICAL INSTITUTE IN THE SCIENCE AND TECHNICAL INSTITUTE OF CHINA NA |
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| CP03 | Change of name, title or address |
Address after: 434000 Jingzhou city of Hubei Province, Shashi District, with Lake Road No. 12 Patentee after: Jianghan Machinery Research Institute of CNPC Drilling Engineering Technology Institute Address before: 434000 Jingzhou city of Hubei Province, Shashi District, with Lake Road No. 12 Chinese Petroleum Group Science and Technology Research Institute of Jianghan Machinery Research Institute Patentee before: Jianghan Machinery Inst., Sci. & Tech. Research Inst. China National Petroleum C |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040218 Termination date: 20101126 |