CN104912516A - Ground controllable type underground switch valve - Google Patents
Ground controllable type underground switch valve Download PDFInfo
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- CN104912516A CN104912516A CN201510271525.3A CN201510271525A CN104912516A CN 104912516 A CN104912516 A CN 104912516A CN 201510271525 A CN201510271525 A CN 201510271525A CN 104912516 A CN104912516 A CN 104912516A
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- lock dog
- urceolus
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- valve body
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Abstract
The invention provides a ground controllable type underground switch valve. The valve comprises an outer cylinder, a connecting body, a sealing assembly, a locking block seat, a locking block, an inner sleeve, a sleeve and an upper joint. The upper end of the outer cylinder is in threaded connection with the lower end of the connecting body, and the connecting body is sleeved with the sealing assembly; the upper end of the connecting body is in threaded connection with the lower end of the locking block seat, the inner cylinder is sleeved with the locking block seat, and the locking block seat is in sliding connection with the inner cylinder; the locking block is embedded in the middle portion of the locking block seat, and the upper end of the locking block seat is in threaded connection with the sleeve. The inner cylinder is in threaded connection with the upper joint, and a locking ring for preventing the inner cylinder from moving upwards is in threaded connection with the upper end of the locking block seat; slope steps which are matched are arranged between the locking block and the inner cylinder, and a valve body is arranged in the outer cylinder; and a fluid channel communicated with a liquid inlet in the lower end of the outer cylinder is arranged between the valve body and the outer cylinder, and when the valve body is closed or opened, the fluid channel is cut off or communicated. The ground controllable type underground switch valve is high in safety, high in stability and convenient to fish, the valve can be easily controlled to be opened and closed, and repeated opening and closing can be achieved.
Description
Technical field
The invention belongs to oil gas field completion steel wire operation technical field, be specifically related to a kind of surface controllable examination underground switching valve.
Background technology
In completion steel wire operation field, when having oil pipe completion, usually use circulation slide sleeve to realize down-hole open and close well, set up and close circulation canal; During tubingless completion, then need to realize driving a well of down-hole and closing well by the down-hole switch instrument of preset (steel wire operation).
Underground switching valve i.e. storm valve, storm valve is a kind of downhole tool preventing blowout, ensure production safety.In oil exploration industry, when carrying out underground work, often there is the situation because the reasons such as mining equipment breaks down cause hydrocarbon fluid flow velocity to increase, at this moment just need to close fluid passage in time, guarantee that operation is complete, avoid larger accident occurs.In actual production, usually use storm valve to close fluid passage, when there are abnormal conditions in well, realize the block function of oil pipe inner fluid.
Environmental protection and safety in production are more and more paid attention in countries in the world; the safety in production of a lot of country to Oil/gas Well has detailed legal provisions, emphasize to be positioned at densely populated areas, Important Economic district, ocean and territorial water body, blowing may be there is or excessive Oil/gas Well all will install storm valve.At present, domestic Shanghai is all provided with storm valve by the Oil/gas Well of blowing ability, oil field, land also practical safety valve in Oil/gas Well more and more.
In long celebrating project completion steel wire operation field, southern Jiangsu, employing be 3.5 inches of single cased hole completion, by steel wire operation down-hole switch instrument is installed in preset seating nipple and realizes driving a well and closing well of down-hole.Schlumberger clock type down-hole switch instrument is mounted in well after seating nipple, realizes driving a well of down-hole by electronic timer and electric machine in the preset time.In use, existence and stability is poor, down-hole fault rate is higher, can not the problem of switch repeatedly for this instrument.Footpath salvaged by this instrument is 1.75 inches, and the gap in the oil pipes of 3.5 inches (internal diameter 2.922 inches) and between oil pipe tube wall is comparatively large, easy accumulation of deposits and not easily salvaging, and causes larger risk to construction.
Summary of the invention
The object of the invention is to overcome poor stability that in prior art, Schlumberger clock type down-hole switch instrument in use exists, down-hole fault rate higher, can not the problem such as switch and solve that to salvage footpath because of this instrument be 1.75 inches repeatedly, gap in the oil pipes of 3.5 inches (internal diameter 2.922 inches) and between oil pipe tube wall is larger, easy accumulation of deposits and not easily salvaging, causes the problem of larger risk to construction.
For this reason, the invention provides the surface controllable that a kind of safety is high, stability strong, be convenient to salvage, switch is easy to control, can realize repeatedly switch and try underground switching valve.
Technical scheme of the present invention is: a kind of surface controllable formula underground switching valve, comprise urceolus, connector, seal assembly, lock dog seat, lock dog, inner core, sleeve and top connection, the upper end of described urceolus is threaded with the lower end of connector, connector is arranged with seal assembly, the upper end of connector is threaded with the lower end of lock dog seat, lock dog cover for seat is located at the outside of inner core and is slidably connected with inner core, and described lock dog is embedded in the middle part of lock dog seat, and the upper end of lock dog seat is connected with bush whorl; Be threaded between inner core with top connection; Lock dog seat threaded upper ends is connected with the clamp ring stoping inner core to move up, the slope step cooperatively interacted is provided with between lock dog and inner core, valve body is provided with in described urceolus, the fluid passage being communicated with urceolus lower end inlet is provided with between valve body with urceolus, this fluid passage is cut-off when described valve body is closed, and is communicated with when described valve body is opened.
It is stifled that above-mentioned valve body comprises piston rod, spool and the end; The middle part of piston rod be threaded between urceolus and be provided with O RunddichtringO, piston rod sidewall has liquid-through hole and lower liquid-through hole; Described piston rod removes middle part threaded joints exceptionally, is provided with fluid passage between its external surface and inner surface of urceolus; The lower end of described spool is provided with the piston one be slidably connected with piston rod, and the middle part of spool is provided with the piston two be slidably connected with piston rod; When valve body is in closed condition, piston one and the end be positioned at bottom piston rod, blocked up and contact, and piston two is between upper and lower liquid-through hole; The upper end of described spool is also provided with fishing neck; When valve body is in open mode, piston one is positioned at the lower position of lower liquid-through hole and piston two is positioned at the top position of liquid-through hole.
Above-mentioned piston one and be equipped with O RunddichtringO between piston two and piston rod.
Be provided with jump ring between above-mentioned spool upper end and urceolus, jump ring upper end is provided with and stops the gland that moves up of spool, be provided with between gland and urceolus be threaded on outer tube inner wall for regulating the hexagon socket cap head screw with stationary gland position.
The quantity of above-mentioned lock dog is 3, and in being uniformly distributed along the circumference of lock dog seat.
O RunddichtringO is provided with between above-mentioned urceolus and connector.
Above-mentioned seal assembly is tubular structure, and its material is rubber.
The inner side of above-mentioned sleeve upper end be connected with between top connection and sleeve for horizontal fixing top connection and reduce top connection up time block to the direct impact force of sleeve.
Beneficial effect of the present invention: the present invention is directed to the deficiency that Schlumberger clock type down-hole switch instrument exists, provide a kind of brand-new underground switching valve, this underground switching valve realizes the open and close of down-hole valve body by the mode of steel wire operation, can time of gauge tap well accurately; By using supporting salvaging 1.375 " outer salvage footpath on hit fishing socket of slipping out of the hand, unlatching repeatedly, closedown that blind hammer instrument can realize underground switching valve, make work progress safe and efficient.Salvaging footpath of the present invention is designed to and pipe aperture (2.922 " close 2.313 "), so that salvage.Relative to Schlumberger clock type underground switching valve, it has, and safety is high, stability is strong, be convenient to salvage, switch is easy to control, can realize repeatedly the distinguishing features such as open and close well.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention;
Fig. 2 (a) is the schematic diagram of switch of the present invention when closing;
Schematic diagram when Fig. 2 (b) is switch opens of the present invention;
Fig. 3 (a) is about to lock dog to strut the schematic diagram at lock dog position when the present invention is in the lock state under inner core;
Fig. 3 (b) is the schematic diagram that the up lock dog of inner core is in lock dog position when free position the present invention is in released state;
Fig. 4 (a) is the schematic diagram of clamp ring when being in free state;
Fig. 4 (b) is the schematic diagram of clamp ring when being in squeezed state.
Description of reference numerals: 1, urceolus; 2, the end, is blocked up; 3, piston rod; 4, spool; 5, jump ring; 6, gland; 7, connector; 8, seal assembly; 9, lock dog seat; 10, lock dog; 11, inner core; 12, clamp ring; 13, block; 14, sleeve; 15, top connection; 16, piston one; 17, fluid passage; 18, upper through hole; 19, hexagon socket cap head screw; 20, lower through-hole; 21, piston two.
Detailed description of the invention
The present invention seeks to overcome Schlumberger clock type down-hole switch instrument in prior art in use existence and stability be poor, down-hole fault rate is higher, can not repeatedly switch problem and solve that to salvage footpath because of this instrument be 1.75 inches, gap in the oil pipes of 3.5 inches (internal diameter 2.922 inches) and between oil pipe tube wall is larger, easy accumulation of deposits and not easily salvaging, causes the problem of greater risk to construction.The surface controllable that the present invention is that a kind of safety is high, stability is strong, be convenient to salvage, switch is easy to control, can realize repeatedly opening tries underground switching valve.
Embodiment 1:
A kind of surface controllable formula underground switching valve as shown in Figure 1, comprise urceolus 1, connector 7, seal assembly 8, lock dog seat 9, lock dog 10, inner core 11, sleeve 14 and top connection 15, the upper end of described urceolus 1 is threaded with the lower end of connector 7, connector 7 is arranged with seal assembly 8, the upper end of connector 7 is threaded with the lower end of lock dog seat 9, lock dog seat 9 is sheathed on the outside of inner core 11 and is slidably connected with inner core 11, be inlaid with lock dog 10 (as shown in Figure 3) at the middle part of lock dog seat 9, lock dog 10 can stretch out and bounce back.The upper end of lock dog seat 9 is threaded with sleeve 14; Be threaded between inner core 11 with top connection 15; Lock dog seat 9 threaded upper ends is connected with the clamp ring 12 stoping inner core 11 to move up, the inner side of sleeve 14 upper end is connected with the block 13 for laterally fixing top connection 15 between top connection 15 and sleeve 14, and clamp ring 12 and block 13 are in order to limit the sliding position of inner core 11 in sleeve 14; Be provided with the slope step cooperatively interacted between lock dog 10 and inner core 11, inner core 11 has sliding space to slide up and down in sleeve 14, and the slope step cooperatively interacted set on inner core 11 and lock dog 10, is realized the folding of lock dog 10 by the diverse location of inner core 11; Be provided with valve body in described urceolus 1, be provided with the fluid passage 17 being communicated with urceolus 1 lower end inlet between valve body with urceolus 1, this fluid passage 17 is cut-off when described valve body is closed, and is communicated with when described valve body is opened.
The quantity of described lock dog 10 is 3, and in being uniformly distributed along the circumference of lock dog seat 9, has good stability when stressed.
O RunddichtringO is provided with between described urceolus 1 and connector 7.
Described seal assembly 8 is tubular structures that rubber does, its Main Function is sealing blanking plug urceolus and the annular section being located pipe nipple, gasket design quantity is 6,3 is a prescription to unanimously, 2 groups of packing ring directions are contrary, respectively subject upwards or downward active force, have certain sealing function when free state to sealing drum, but sealing is thorough, when be subject to from it on or its time active force time gasket deforms turn up absolute sealing function played to sealing drum.
The concrete mosaic mode of described lock dog 10 is: three lock dogs are triangular in shape to be symmetrically distributed in around lock dog seat 9, and as shown in Figure 3, when inner core 11 is descending, strutted by lock dog, tool lock fixes in pit shaft; When inner core 11 is up, lock dog is in free position, and instrument is in released state.Described block 13 is four piece of 1/4 circular block, is assembled into an annulus, and the impact of top connection 15 and sleeve 14 is fixed and cushioned to the transverse direction in order to top connection 15.
As shown in Figure 4, described clamp ring 12 is " C " shape ring that can produce deformation, be enclosed within the groove set by inner core 11 outer wall, for the axial restraint of top connection 15, lock dog seat 9 upper sleeve end face is designed to 30 ° of chamferings, clamp ring external margin is also 45 ° of chamferings, when top connection 15 is descending, very large squeezing action is played to clamp ring 12, clamp ring 15 starts by free state crimp, diameter starts to reduce, effect reaches clamp ring undergauge to when can enter the state of sleeve, at this moment locking spindle and clamp ring starts synchronously to move down, clamp ring starts to enter in clamp ring groove, now the reducing table top of inner core 11 forces lock dog to stretch out, top connection 15 lower surface contacts with sleeve 14 upper surface, instrument is fixed, setting locking completes.
Embodiment 2:
On the basis of embodiment 1, as shown in Figures 1 and 2, described valve body comprises piston rod 3, spool 4 and the end stifled 2; The middle part of piston rod 3 be threaded between urceolus 1 and be provided with O RunddichtringO, piston rod 3 sidewall has liquid-through hole 18 and lower liquid-through hole 20; Described piston rod 3 removes middle part threaded joints exceptionally, is provided with fluid passage 17 between the inner surface of its external surface and urceolus 1; The lower end of described spool 4 is provided with the piston 1 be slidably connected with piston rod 3, and the middle part of spool 4 is provided with the piston 2 17 be slidably connected with piston rod 3; When valve body is in closed condition, piston 1 contacted with the end be positioned at bottom piston rod 3 stifled 2, and piston 2 21 is positioned at upper and lower liquid-through hole 18, between 20; The upper end of described spool 4 is also provided with fishing neck; When valve body is in open mode, piston 1 is positioned at the lower position of lower liquid-through hole 20 and piston 2 21 is positioned at the top position of liquid-through hole 18; Slided up and down in the piston rod 3 of valve body by spool 4, can link up or close fluid passage.Piston 1 and be equipped with O RunddichtringO between piston 2 21 and piston rod 3.
Be provided with jump ring 5 between described spool 4 upper end and urceolus, jump ring 5 upper end is provided with the gland 6 stopping that spool 4 moves up spacing, and gland 6 limits spool 4 by step outstanding on spool 4 and exceeds spacing.Be provided with between gland 6 and urceolus 1 be threaded in urceolus 1 inwall outstanding position on for regulating the hexagon socket cap head screw 19 with stationary gland 6 position.Therefore, the object of jump ring 5 and gland 6 is fixed spool 4 positions, and hexagon socket cap head screw 19 is in order to regulate and stationary gland 6.
Concrete practice application of the present invention: in the well well completing test operation of Chang Qing company, what Schlumberger clock type underground switching valve is arranged on 3835.46 meters of by steel wire operation is located in pipe nipple, after 72 hours, well head is without pressure, and do not changed by electronic pressure gauge detection liquid level position, judge that underground switching valve is not opened at preset time (72 hours), enter fishing tool down immediately to salvage, hit on after catching instrument switch valve to be salvaged for tens of times and be located pipe nipple, fishing tool is made to exit fishing neck for avoiding accident by shearing pin nail, by increasing pulling force after taking out fishing tool, jarring number of times and dynamics, all fail of the effect.
Think there is Impurity deposition between fishing neck and pit shaft, cause this instrument to be difficult to deblocking.In the Chang Qing company well well completing test operation of identical geological condition subsequently, what our the homemade mechanical downhole switch valve provided in the present embodiment is arranged on 3923.32 meters of by steel wire operation is located in pipe nipple, opener is entered by under steel wire operation after 96 hours, after catching gauge tap fishing neck, upwards jarring once successfully opens valve member, and continue jarring 4 times, opener is slipped out of the hand, take out steel wire tool string, be successfully completed down-hole and drive a well.
The underground switching valve that employing the present embodiment provides is in a certain object well completing test job execution of Chang Qing company southern Jiangsu, switching tools under first lower going-into-well, this instrument connects monitoring pressure meter 2, instrument is in closed condition, enter well by Special fishing tool before productivity test and catch spool 4, upwards jarring makes it open, productivity test is after 7 days, under enter the downward vibration of blind hammer instrument, close spool thus realize downhole closing, down-hole pressure measures the strata pressure recovery situation of this well, after pressure detecting January, again descend Special fishing tool, switch valve is opened.
This time construction achieves a closing well, drives a well for twice, is once success, obtains Construction Party and highly praise.Table 1 is prior art and the present invention's Contrast on effect table in construction.
Table 1: prior art and the present invention be Contrast on effect table in construction
The invention belongs to mechanical downhole switch valve, it possesses following features:
1 mechanical open closing well, be easy to control, stability is strong;
2) " shell clearance is less, not easily deposits, and is convenient to salvage to salvage footpath and 3.5;
3) switch well repeatedly can be realized;
4) switch well at any time can be realized;
5 operating risks are less.
Wherein mechanical open closing well has been come by steel wire operation, and footpath salvaged by internal control switch well is 1.375 ".
Salvaging footpath of the present invention is 2.313 ", be interior salvaging mode.
The kit that the present invention realizes switch well is repeatedly respectively salvaging 1.375 " salvage footpath on hit fishing socket of slipping out of the hand, blind hammer instrument.
This underground switching valve is located pipe nipple inwall by the sealing assembly 8 on its urceolus with pit shaft and forms microgap compound seal thus seal oil pipe; By special fishing socket and blind hammer instrument, control spool 4 and move up and down, reach the object of open and close well.
During installation, by steel wire operation mode, the input of this valve is located pipe nipple to pit shaft, bumper jar is used to carry out jarring downwards, block 13 slips off, top connection 15 and inner core 11 move down in sleeve 14, and lock dog 10 opens in lock dog seat 9, and clamp ring 12 is fixed, sealing assembly 8 is close to and is located pipe nipple inwall, is fixed on by switch valve to be located in pipe nipple and to be formed with tube inner wall to seal.Continue downward jarring and shear release pin, delivery tool (GS) and switch valve are slipped out of the hand, and reclaim steel wire operation tool string.
During closing well, by entering special blind hammer instrument under steel wire operation mode, bumper jar is used to carry out jarring downwards, spool 4 moves down in valve body, О type circle sealed outer cylinder 1 on piston one and piston two and spool 4, O RunddichtringO sealed outer cylinder 1 between the middle part of piston rod 3 and urceolus 1 set by connection of thread and piston rod 4, O RunddichtringO set between urceolus 1 and connector 7 seals whole oil pipe and realizes closing well.Reclaim steel wire operation tool string.
When driving a well, enter special fishing socket by under steel wire operation mode, after catching spool 4, use bumper jar upwards to carry out jarring, spool 4 in valve body on move, thus be communicated with oil-gas Layer and pit shaft, realize driving a well.Jump ring 5 and gland 6 are in order to fixed spool 4 position, and hexagon socket cap head screw 19 is in order to regulate and stationary gland 6, and continue upwards to carry out jarring, shear release pin, special fishing socket (JU) and spool are slipped out of the hand, and reclaim steel wire operation tool string.
During recovery, by entering fishing tool (GS) under steel wire operation mode, after catching fishing neck, bumper jar is used upwards to carry out jarring, top connection 15 and inner core 11 in sleeve 14 on move, lock dog 10 shrinks, and underground switching valve discharges from being located pipe nipple, upwards trip out steel wire operation tool string, i.e. this valve recyclable.
This brand-new underground switching valve that theres is provided of deficiency that Schlumberger clock type down-hole switch instrument exists is provided, is realized the open and close of down-hole valve body by the mode of steel wire operation, can time of gauge tap well accurately; By using supporting salvaging 1.375 " outer salvage footpath on hit fishing socket of slipping out of the hand, unlatching repeatedly, closedown that blind hammer instrument can realize underground switching valve, make work progress safe and efficient.Salvaging footpath of the present invention is designed to and pipe aperture (2.922 " close 2.313 "), so that salvage.Relative to Schlumberger clock type underground switching valve, it has, and safety is high, stability is strong, be convenient to salvage, switch is easy to control, can realize repeatedly the distinguishing features such as open and close well.
The part do not described in detail in present embodiment belongs to the known conventional means of the industry, does not describe one by one here.More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (8)
1. a surface controllable formula underground switching valve, comprise urceolus (1), connector (7), seal assembly (8), lock dog seat (9), lock dog (10), inner core (11), sleeve (14) and top connection (15), it is characterized in that: the upper end of described urceolus (1) is threaded with the lower end of connector (7), connector (7) is arranged with seal assembly (8), the upper end of connector (7) is threaded with the lower end of lock dog seat (9), lock dog seat (9) is sheathed on the outside of inner core (11) and is slidably connected with inner core (11), described lock dog (10) is embedded in the middle part of lock dog seat (9), the upper end of lock dog seat (9) is threaded with sleeve (14), be threaded between inner core (11) with top connection (15), lock dog seat (9) threaded upper ends is connected with the clamp ring (12) stoping inner core (11) to move up, the slope step cooperatively interacted is provided with between lock dog (10) and inner core (11), described urceolus is provided with valve body in (1), the fluid passage (17) being communicated with urceolus (1) lower end inlet is provided with between valve body with urceolus (1), this fluid passage (17) is cut-off when described valve body is closed, and is communicated with when described valve body is opened.
2. a kind of surface controllable formula underground switching valve as claimed in claim 1, is characterized in that: described valve body comprises piston rod (3), spool (4) and the end stifled (2); The middle part of piston rod (3) be threaded between urceolus (1) and be provided with O RunddichtringO, piston rod (3) sidewall has liquid-through hole (18) and lower liquid-through hole (20); Described piston rod (3) except middle part threaded joints exceptionally, be provided with fluid passage (17) between the inner surface of its external surface and urceolus (1); The lower end of described spool (4) is provided with the piston one (16) be slidably connected with piston rod (3), and the middle part of spool (4) is provided with the piston two (17) be slidably connected with piston rod (3); When valve body is in closed condition, piston one (16) contacted with the end stifled (2) being positioned at piston rod (3) bottom, and piston two (21) is positioned between upper and lower liquid-through hole (18,20); The upper end of described spool (4) is also provided with fishing neck; When valve body is in open mode, piston one (16) is positioned at the lower position of lower liquid-through hole (20) and piston two (21) is positioned at the top position of liquid-through hole (18).
3. a kind of surface controllable formula underground switching valve as claimed in claim 2, is characterized in that: described piston one (16) and be equipped with O RunddichtringO between piston two (21) and piston rod (3).
4. a kind of surface controllable formula underground switching valve as claimed in claim 2, it is characterized in that: described spool (4) is provided with jump ring (5) between upper end and urceolus, jump ring (5) upper end is provided with and stops spool (4) gland (6) that moves up, is provided with the hexagon socket cap head screw (19) for adjustment and stationary gland (6) position be threaded on urceolus (1) inwall between gland (6) and urceolus (1).
5. a kind of surface controllable formula underground switching valve as claimed in claim 1, is characterized in that: the quantity of described lock dog (10) is 3, and in being uniformly distributed along the circumference of lock dog seat (9).
6. a kind of surface controllable formula underground switching valve as claimed in claim 1, is characterized in that: be provided with O RunddichtringO between described urceolus (1) and connector (7).
7. a kind of surface controllable formula underground switching valve as claimed in claim 1, it is characterized in that: described seal assembly (8) is tubular structure, its material is rubber.
8. a kind of surface controllable formula underground switching valve as claimed in claim 1, is characterized in that: the inner side of described sleeve (14) upper end be connected be positioned between top connection (15) and sleeve (14) for horizontal fixing top connection (15) and reduce top connection (15) up time block (13) to the direct impact force of sleeve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510271525.3A CN104912516B (en) | 2015-05-25 | 2015-05-25 | Ground controllable type underground switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510271525.3A CN104912516B (en) | 2015-05-25 | 2015-05-25 | Ground controllable type underground switch valve |
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| CN104912516A true CN104912516A (en) | 2015-09-16 |
| CN104912516B CN104912516B (en) | 2017-05-24 |
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| CN201510271525.3A Expired - Fee Related CN104912516B (en) | 2015-05-25 | 2015-05-25 | Ground controllable type underground switch valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457377A (en) * | 1982-09-03 | 1984-07-03 | Halliburton Company | Sliding valve float collar |
| CN201546675U (en) * | 2009-11-17 | 2010-08-11 | 中国石油天然气股份有限公司 | Interlayer control valve used for well completion |
| CN202117628U (en) * | 2011-07-05 | 2012-01-18 | 中国石油集团海洋工程有限公司 | Liquid flow diversion valve |
| WO2013147638A1 (en) * | 2012-03-27 | 2013-10-03 | Ufimtsev Vladimir Anatolyevich | Manometer needle valve |
| CN103742102A (en) * | 2014-01-09 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Preset packer and packing and fishing tool |
| CN204738785U (en) * | 2015-05-25 | 2015-11-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Controllable formula in ground is ooff valve in pit |
-
2015
- 2015-05-25 CN CN201510271525.3A patent/CN104912516B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457377A (en) * | 1982-09-03 | 1984-07-03 | Halliburton Company | Sliding valve float collar |
| CN201546675U (en) * | 2009-11-17 | 2010-08-11 | 中国石油天然气股份有限公司 | Interlayer control valve used for well completion |
| CN202117628U (en) * | 2011-07-05 | 2012-01-18 | 中国石油集团海洋工程有限公司 | Liquid flow diversion valve |
| WO2013147638A1 (en) * | 2012-03-27 | 2013-10-03 | Ufimtsev Vladimir Anatolyevich | Manometer needle valve |
| CN103742102A (en) * | 2014-01-09 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Preset packer and packing and fishing tool |
| CN204738785U (en) * | 2015-05-25 | 2015-11-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Controllable formula in ground is ooff valve in pit |
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| CN104912516B (en) | 2017-05-24 |
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