CN201810261U - Water-injecting packer capable of being backwashed - Google Patents
Water-injecting packer capable of being backwashed Download PDFInfo
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- CN201810261U CN201810261U CN 201020225672 CN201020225672U CN201810261U CN 201810261 U CN201810261 U CN 201810261U CN 201020225672 CN201020225672 CN 201020225672 CN 201020225672 U CN201020225672 U CN 201020225672U CN 201810261 U CN201810261 U CN 201810261U
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- backwash valve
- well
- pipe
- central tube
- packing element
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Abstract
The utility model discloses a water-injecting packer capable of being backwashed, which comprises a center pipe, a well washing sleeve which is sheathed at the outer side of the upper part of the center pipe, a backwashing valve seat and a glue cylinder inner pipe, wherein an overflowing annular gap is remained between the glue cylinder inner pipe and the center pipe, the well washing sleeve is provided with a well washing opening which is communicated with the overflowing annular gap, an annular cavity between the well washing sleeve and the center pipe is assembled with a backwashing valve which is matched with the backwashing valve seat for sealing a flow channel between the well washing opening and the overflowing annular gap by means of sealing and sliding, the upper end surface of the backwashing valve seat is axially provided with an annular groove, the annular groove is internally embedded with a sealing glue cushion which is pressed and matched with the backwashing valve seat in a sealing way, and the upper end surface of the sealing glue cushion is not lower than the upper end of the glue cylinder inner pipe. The packer is simple in structure, prevents the phenomenon that impurity is precipitated and deposited on the backwashing valve seat, and 0effectively solves the problems of the layer cross flow and the like caused by the bad seal of the backwashing valve and the large differential pressures among layers after a well is backwashed by the existing water injecting packer, thus improving the stability and the reliability.
Description
Technical field
The utility model belongs to the oilfield exploitation technical field, be particularly related to a kind of self-closed type packer of separate water injection well, effectively solve behind the anti-flushing well that backwash valve is poorly sealed, problem such as big, the crossflow of interlayer pressure reduction in the injecting process, belong to the compression water injection packer.
Background technology
Water injection well adopts packer to realize seperated layer water injection in the process of producing, and daily management needs regular anti-flushing well, and during the metaideophone of the qualified back of well-flushing, the packer backwash valve is not closed completely, and the packer leakage causes normally dispensing; In the injecting process, because of the water injection pressure fluctuation, backwash valve has the problem of leaving backwash valve seat blow-by face; At some separate water injection wells, because interlayer pressure difference is big, in the process of stopping annotating, high pressure zone backs down backwash valve, flows backwards to the low pressure layer, and these problems cause normally dispensing.The water injection packer of down-hole string employing does not at present generally adopt the self closing structure, and easily leakage stops the notes process and causes the crossflow problem behind the anti-flushing well, influences the dispensing flood effectiveness.
The patent No. is that the Chinese utility model patent manual of ZL200520145526.5 discloses a kind of seperated layer water injection washing well packer, this packer comprises backwash valve pocket, backwash piston, piston seat, piston bush, central tube and excenter tube, leave fluid course between central tube and the excenter tube, put in backwash valve and to offer the backwash intake chamber, offer the backwash mouth of a river of bar shaped on piston seat, backwash intake chamber, the backwash mouth of a river and fluid course constitute the backwash passage of packer.Between backwash valve pocket and central tube, be provided with ring cavity, extend downwards the bottom of ring cavity, below the opening of the backwash mouth of a river and backwash intake chamber, form a circle annular groove, the backwash piston is inserted into after pressurized is descending in this annular groove, and the O-ring seal of dependence backwash piston inner wall setting and piston seat are sealed and matched and close the backwash passage.But during owing to backwash, often be mingled with silt in the water, flushing fluid is by the ring cavity between backwash valve pocket and the piston seat time, silt can precipitate alluvial in the annular groove of ring cavity bottom, cause the backwash piston can not descendingly to put in place when pressurized is descending, O-ring seal on the backwash piston and piston seat can't form and be sealed and matched, and cause backwash valve to be not closed completely, form crossflow during water filling easily, influence flood effectiveness.
The utility model content
The purpose of this utility model is: a kind of simple in structure, reliable back-washable water injection packer of well-flushing pathway closure is provided.
The technical solution of the utility model is: a kind of back-washable water injection packer, comprise central tube and be sleeved on the well-flushing cover of central tube upper outside and packing element in manage, well-flushing puts and offers the well-flushing mouth, in packing element, be provided with between pipe and the central tube and be used for the overcurrent annular space that backwash liquor flows through, between well-flushing cover and central tube, be provided with the annular valve pocket that is communicated with well-flushing mouth and overcurrent annular space, the valve pocket bottom is provided with the runner that is communicated with well-flushing mouth and overcurrent annular space, be provided with the backwash valve that is used to seal this runner in the valve pocket, in packing element, be set with the backwash valve seat that cooperates with backwash valve on the upper end outer wall of pipe, axially offer annular groove on the upper surface of described backwash valve seat, be embedded with the seal gasket that is sealed and matched with the backwash valve roof pressure in the annular groove, the upper surface of seal gasket is not less than the upper end of pipe in the packing element.
Described seal gasket is the up-small and down-big L-shaped annulus structure in longitudinal section, and the vertical sectional shape of described annular groove is identical with the vertical sectional shape of seal gasket.
Described backwash valve and well-flushing cover and central tube difference sealed sliding are movingly, annular valve pocket is separated into the described runner of pressure pocket and bottom on top, offer on the center tube wall above the described backwash valve be communicated with pressure pocket on inlet opening, the upper and lower of described backwash valve is respectively equipped with and is used to promote the pressure-bearing end face that backwash valve moves, and the area of described backwash valve upper end pressure-bearing end face is greater than the area of its underpart pressure-bearing end face.
Radially convex with annular boss being arranged on the central tube outer wall in annular plate valve chamber, the lower inner wall of described backwash valve and this annular boss sealed sliding are movingly.
In described packing element, be set with cartridge outside the pipe, the bottom roof pressure of cartridge is equipped with adjustable ring, bottom at adjustable ring is fixedly connected with retaining mechanism, described retaining mechanism comprises being connected with adjustable ring and is sleeved in the packing element the outside lock tube of pipe, in packing element, be fixed with the snap lock pawl of downward extension on the lower end inwall of pipe, the top of snap lock pawl and central tube outer wall are sealed and matched, leave radial elastic between the bottom of snap lock pawl and the central tube outer wall and actuate the gap, correspondence is provided with the lock tooth between lock tube and snap lock pawl, on the central tube outer wall below the snap lock pawl, be fixed with axial upwardly extending release cover, the upper end of this release cover is provided with the enlarging structure that is used to draw in the snap lock pawl, and corresponding release is arranged with the closing in structure in the lower end of snap lock pawl.
Geometrical clamp is provided with sand stop ring between pipe and the snap lock pawl in described packing element, and this sand stop ring is slidingly matched along the inwall that extends radially outwardly with lock tube of central tube.
The utility model adopts technique scheme, because the upper surface that cooperates with backwash valve on the seal gasket is not less than the upper end of pipe in the packing element, thereby contamination precipitation alluvial phenomenon can not appear, backwash valve keeps closely cooperating with the seal gasket roof pressure under pressurized, efficiently solve the problems such as crossflow that backwash valve is poorly sealed, interlayer pressure difference causes greatly behind the existing water injection packer anti-flushing well, improved stable, the reliability of water injection packer.
Described backwash valve and well-flushing cover and central tube difference sealed sliding are movingly, annular valve pocket is separated into the described runner of pressure pocket and bottom on top, offer on the center tube wall above the described backwash valve be communicated with pressure pocket on inlet opening, the upper and lower of described backwash valve is respectively equipped with and is used to promote the pressure-bearing end face that backwash valve moves, and the area of described backwash valve upper end pressure-bearing end face is greater than the area of its underpart pressure-bearing end face.The downward active force that makes backwash valve be subjected to is greater than the active force that makes progress that is subjected to, thereby have only when sleeve pipe hydraulic pressure is higher than the specified pressure of oil pipe hydraulic pressure, backwash valve just can be opened, play phenomenon about the backwash valve of having avoided occurring causing because of the interlayer pressure difference disturbance has guaranteed the normal operation of packer seperated layer water injection work.
Central tube is provided with the convex type ring platform, backwash valve is spacing, simultaneously backwash valve lower end inwall and this convex type ring platform sealed sliding movingly, it has increased the sealing between backwash valve and the central tube, thereby further avoids occurring the crossflow problem that causes because of backwash valve is poorly sealed.
It is the structure of L type that annular groove on seal gasket and the backwash valve seat all adopts the longitudinal section, can the installation stability of enhanced leaktightness rubber cushion in packer, prevent that seal gasket is come off by hydraulic action, and guarantee that the sealingly secure of backwash valve is reliable.
Adopt lock tube, snap lock pawl and discharge the retaining mechanism that cover constitutes, its locking is stable, and convenient for unlocking has further improved the dependability of water injection packer.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, back-washable water injection packer of the present utility model is by managing 10 in top connection 1, protection seat 2, deblocking pin 3, well-flushing cover 4, upper piston 5, piston baffle ring 6, backwash valve 7, backwash valve seat 9, the packing element, central tube 11, spacer ring 12, packing element 13, adjustable ring 14, sand stop ring 15, snap lock pawl 16, lock tube 17, discharging cover 18, piston 19, cylinder sleeve 20, lower contact 21, set pin 22 and dowel bushing 23 is formed.Pipe in fixing composition that be threaded is adopted in top connection 1, central tube 11, lower contact 21 successively, and pipe 10, adjustable ring 14, lock tube 17 and cylinder sleeve 20 connect to form outer tube successively in well-flushing cover 4, backwash valve seat 9, the packing element.Wherein, well-flushing cover 4 is fixed on the outside of top connection 1 by liberation pin 3, is provided with protection seat 2 above being positioned at well-flushing cover 4, and protection seat 2 is by being threaded in the top connection upper end.Offer the well-flushing mouth 26 that is used for by flushing fluid on the well-flushing cover 4, the lower end of well-flushing cover 4 is by the interior button backwash valve seat 9 that is threaded, backwash valve seat 9 bottoms are threaded by interior button and manage 10 in the packing element, be provided with overcurrent annular space 27 between pipe 10 and the central tube 11 in the packing element, form annular valve pocket between well-flushing cover 4 and the central tube 11, sealing is slided and is equipped with backwash valve 7 in the valve pocket, backwash valve 7 is separated into the pressure pocket on top and the runner that the bottom is used to be communicated with well-flushing mouth 26 and overcurrent annular space 27 with annular valve pocket, offers with pressure pocket to be communicated with on the center tube wall above the backwash valve 7, be used to promote the descending last inlet opening 24 of backwash valve 7; The upper and lower of backwash valve 7 is respectively equipped with and is used to promote the pressure-bearing end face that backwash valve 7 moves, it is positioned at the pressure-bearing face area of the area of the pressure-bearing end face on the backwash valve greater than its underpart, thereby maintenance that can be stable under tubing pressure is to the sealing of backwash runner.The inside and outside wall on backwash valve 7 tops overlaps 4 sealed sliding movingly with central tube 11 and well-flushing respectively, radially convex with annular boss on the central tube outer wall that is positioned at backwash valve 7 bottoms, the inside wall of backwash valve 7 bottoms and this annular boss sealed sliding are movingly and spacing by it.Upper surface at backwash valve seat 9 axially offers annular groove, the longitudinal section of annular groove is up-small and down-big L shaped structure, be embedded with in the annular groove and be used for the seal gasket 8 that is sealed and matched with backwash valve 7, seal gasket 8 and annular groove inwall coincide, and to be the longitudinal section be L shaped annulus structure, for preventing in seal gasket 8 places generation sediment deposition alluvial phenomenon, the upper surface that is used for cooperating with backwash valve 7 on the seal gasket 8 is not less than the upper end of pipe 10 in the packing element, in the present embodiment, the upper surface of seal gasket 8 is a little more than the upper end of pipe 10 in the packing element.Be the pressure of balance backwash valve 7, above backwash valve 7, the lower end outer cover of top connection is equipped with upper piston 5, button is threaded upper piston 5 is spacing outside piston baffle ring 6 and top connection 1 lower end.
In packing element on pipe 10 the outer wall from top to bottom successively slip cap packing element 13 is housed, spacer ring 12, adjustable ring 14 and lock tube 17, in the present embodiment, be set with three packing elements 13 in the packing element outside the pipe 10, adopt spacer ring 12 to separate between each packing element, adjustable ring 14 roof pressures are assemblied in the bottom of the packing element 13 of bottom, bottom at adjustable ring 14 is fixedly connected with retaining mechanism, this retaining mechanism comprises lock tube 17 and lock pawl 16, adjustable ring 14 is threaded on the lock tube 17 by interior button, snap lock pawl 16 is threaded on the lower end inwall of pipe 10 in the packing element by interior button, be respectively arranged with corresponding lock tooth between lock tube 17 and the snap lock pawl 16, to keep the state that sets of packer.Be sealed and matched between the outer wall of the upper inside wall of snap lock pawl 16 and central tube 11, pipe weep hole 28 in offering on the tube wall of pipe 10 in the packing element above snap lock pawl 16, offer lock tube weep hole 29 on the top tube wall of lock tube 17, the lower end edge of snap lock pawl 16 axially extends downwards, be provided with radial elastic between the bottom of snap lock pawl 16 and the central tube 11 and actuate the gap, screw thread is fixed with axial upwardly extending release cover 18 on the center tube wall below the snap lock pawl 16, be provided with the enlarging structure that is used to draw in snap lock pawl 16 in the upper end that discharges cover, be provided with corresponding closing in structure in the lower end of snap lock pawl 16.For preventing that impurity such as silt in the backwash process from entering in the cavity between lock tube 17 and the central tube 11, hinder the release of lock tube 17 and snap lock pawl 16, folder is established and is fixed with sand stop ring 15 between the pipe 10 in snap lock pawl 16 and packing element, and the inwall that the periphery of this sand stop ring 15 extends radially outward with lock tube 17 is slidingly matched.Lock tube 17 lower ends are by the outer button cylinder sleeve 20 that is threaded, lock tube 17 lower ends are withstood and are set piston 19, dowel bushing 23 is threaded with lower contact 21, sets pin 22 dowel bushing 23 is fixed on the cylinder sleeve 20, offers inlet opening 25 down on the center tube wall that sets between piston 19 and the lower contact.Well-flushing mouth 26, overcurrent annular space 27, interior pipe weep hole 28, the lock tube weep hole 29 common well-flushing passages of forming, backwash valve 7 pressurizeds contact with seal gasket 8 roof pressures realizes opening and closing of well-flushing passage.
During work, back-washable water injection packer is threaded in respectively in the oil pipe by its top connection 1 and lower contact 21, goes into the well to design attitude with water injection string.When setting, suppress by interior pipe, hydraulic pressure enters down inlet opening 25, the pressure that injects acts on and sets on the piston 19, withstand lock tube 17 simultaneously, drive cylinder sleeve 20 the upwards trend of motion is arranged, when pressure reaches when setting pressure, setting pin 22 is cut off, set that piston 19 promotes lock tubes 17, adjustable ring 14 drives cylinder sleeve 20 integral body simultaneously and moves up down, compression packing element 13 radial dilatation are close to sleeve pipe and are realized sealing, and the lock tooth of lock tube 17 is up realizes locking with the complete interlock of lock tooth snap lock pawl 16, sets end; Simultaneously, hydraulic pressure moves downward from last inlet opening 24 promotion backwash valve 7 and compresses seal gasket 8, because the last compression end area of backwash valve 7 is greater than following compression end area, under hydraulic pressure, have a bigger downward masterpiece to be used on the backwash valve 7, backwash valve 7 remains seal gasket 8 is compressed sealing; Backwash valve 7 realizes closing well-flushing passage, the pressure on the upper piston 5 up balance backwash valve 7.During water filling, when the water injection pressure fluctuation, backwash valve 7 remains the impaction state to seal gasket 8, and backwash valve 7 can not shaken up and down and leakage phenomena be occurred.During anti-flushing well, have only when casing pressure is higher than oil pipe 3～5MPa, could promote the backwash valve 7 up seal gaskets 8 that leave, open the backwash passage, flushing fluid enters overcurrent annular space 27 from well-flushing mouth 26, the outer tube weep hole 28 of flowing through, enter the oil jacket annular space from lock tube weep hole 29 and realize anti-flushing well, after anti-flushing well finishes, casing pressure reduces, and backwash valve 7 cooperates with seal gasket 8 under tubing pressure automatically closes the well-flushing passage, because seal gasket 8 flushes substantially with the interior pipe 10 of packing element, thereby contamination precipitation alluvial phenomenon can not appear, the problem that backwash valve fits badly behind the anti-flushing well can not appear.Backwash valve 7 is spacing and keep sealed sliding state movingly with it by the annular boss on the center tube wall all the time when upper and lower action, can further strengthen the sealing of backwash valve, improves the holding capacity of the interlayer pressure difference of water injection packer, prevents crossflow.Sand stop ring 15 cooperates the gap between interior pipe 10 of sealing packing element and the lock tube with lock tube 17 inwalls, the impurity sand grains enters lock pawl 16 and lock tube 17 interlocks place in the prevention flushing fluid, prevents because of interlock place sand setting, causes the big problem of deblocking load.During deblocking, on put on joint 1, when on when carrying tonnage and reaching 40KN, because the frictional force that packing element 13 sets between back and the sleeve pipe is bigger, the upper lifting force amount can't spur well-flushing cover 4, backwash valve seat 9, pipe 10 in the packing element, following adjustable ring 14, the outer tube that lock tube 17 and cylinder sleeve 20 are formed, cause the deblocking pin 3 between well-flushing cover 4 and the top connection 1 to be cut off, top connection 1 drives central tube 11, lower contact 21 is whole up, it is up with central tube 11 to discharge cover 18, by with snap lock pawl 16 between the inclined-plane cooperate snap lock pawl 16 inwardly strutted, making on snap lock pawl 16 and the lock tube 17 mutually, the lock tooth of interlock separates, locking is eliminated, lock tube 17 drives adjustable ring 14 down, cylinder sleeve 20 is descending, and packing element 13 resilience deblockings trip out tubing string at last.
Claims (6)
1. back-washable water injection packer, comprise central tube and be sleeved on the well-flushing cover of central tube upper outside and packing element in manage, well-flushing puts and offers the well-flushing mouth, in packing element, be provided with between pipe and the central tube and be used for the overcurrent annular space that backwash liquor flows through, between well-flushing cover and central tube, be provided with the annular valve pocket that is communicated with well-flushing mouth and overcurrent annular space, the valve pocket bottom is provided with the runner that is communicated with well-flushing mouth and overcurrent annular space, be provided with the backwash valve that is used to seal this runner in the valve pocket, in packing element, be set with the backwash valve seat that cooperates with backwash valve on the upper end outer wall of pipe, it is characterized in that, axially offer annular groove on the upper surface of described backwash valve seat, be embedded with the seal gasket that is sealed and matched with the backwash valve roof pressure in the annular groove, the upper surface of seal gasket is not less than the upper end of pipe in the packing element.
2. back-washable water injection packer according to claim 1 is characterized in that, described seal gasket is the up-small and down-big L-shaped annulus structure in longitudinal section, and the vertical sectional shape of described annular groove is identical with the vertical sectional shape of seal gasket.
3. back-washable water injection packer according to claim 1, it is characterized in that, described backwash valve and well-flushing cover and central tube difference sealed sliding are movingly, annular valve pocket is separated into the described runner of pressure pocket and bottom on top, offer on the center tube wall above the described backwash valve be communicated with pressure pocket on inlet opening, the upper and lower of described backwash valve is respectively equipped with and is used to promote the pressure-bearing end face that backwash valve moves, and the area of described backwash valve upper end pressure-bearing end face is greater than the area of its underpart pressure-bearing end face.
4. back-washable water injection packer according to claim 1 is characterized in that, radially convexes with annular boss being arranged on the central tube outer wall in annular plate valve chamber, and the lower inner wall of described backwash valve and this annular boss sealed sliding are movingly.
5. according to any described back-washable water injection packer of claim 1 ~ 4, it is characterized in that, in described packing element, be set with cartridge outside the pipe, the bottom roof pressure of cartridge is equipped with adjustable ring, bottom at adjustable ring is fixedly connected with retaining mechanism, described retaining mechanism comprises being connected with adjustable ring and is sleeved in the packing element the outside lock tube of pipe, in packing element, be fixed with the snap lock pawl of downward extension on the lower end inwall of pipe, the top of snap lock pawl and central tube outer wall are sealed and matched, leave radial elastic between the bottom of snap lock pawl and the central tube outer wall and actuate the gap, correspondence is provided with the lock tooth between lock tube and snap lock pawl, on the central tube outer wall below the snap lock pawl, be fixed with axial upwardly extending release cover, the upper end of this release cover is provided with the enlarging structure that is used to draw in the snap lock pawl, and corresponding release is arranged with the closing in structure in the lower end of snap lock pawl.
6. back-washable water injection packer according to claim 5 is characterized in that, geometrical clamp is provided with sand stop ring between pipe and the snap lock pawl in described packing element, and this sand stop ring is slidingly matched along the inwall that extends radially outwardly with lock tube of central tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020225672 CN201810261U (en) | 2010-06-13 | 2010-06-13 | Water-injecting packer capable of being backwashed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020225672 CN201810261U (en) | 2010-06-13 | 2010-06-13 | Water-injecting packer capable of being backwashed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810261U true CN201810261U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020225672 Expired - Lifetime CN201810261U (en) | 2010-06-13 | 2010-06-13 | Water-injecting packer capable of being backwashed |
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| Country | Link |
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| CN (1) | CN201810261U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321605A (en) * | 2013-05-24 | 2013-09-25 | 中国石油化工股份有限公司 | Downward striking type unblocking packer |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN107780875A (en) * | 2016-08-29 | 2018-03-09 | 中国石油天然气股份有限公司 | Blanking plug |
| CN108412426A (en) * | 2018-02-01 | 2018-08-17 | 西南石油大学 | A kind of borehole wall eyelid retractor for oil/gas well self-advancing type water-jet |
| CN110566144A (en) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| RU199106U1 (en) * | 2020-05-28 | 2020-08-17 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Hydraulic packer valve |
| CN112211587A (en) * | 2019-07-10 | 2021-01-12 | 中国石油天然气股份有限公司 | Packer (CN) |
| CN114439432A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Hydraulic shaping, filling and sand prevention integrated pipe column and method |
-
2010
- 2010-06-13 CN CN 201020225672 patent/CN201810261U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321605A (en) * | 2013-05-24 | 2013-09-25 | 中国石油化工股份有限公司 | Downward striking type unblocking packer |
| CN103321605B (en) * | 2013-05-24 | 2016-01-06 | 中国石油化工股份有限公司 | Under hit formula unfreezing packer |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN104929563B (en) * | 2015-05-27 | 2017-10-17 | 中国石油天然气股份有限公司 | Water injection packer |
| CN107780875A (en) * | 2016-08-29 | 2018-03-09 | 中国石油天然气股份有限公司 | Blanking plug |
| CN107780875B (en) * | 2016-08-29 | 2023-09-26 | 中国石油天然气股份有限公司 | Plug device |
| CN108412426B (en) * | 2018-02-01 | 2019-04-16 | 西南石油大学 | A kind of borehole wall eyelid retractor for oil/gas well self-advancing type water-jet |
| CN108412426A (en) * | 2018-02-01 | 2018-08-17 | 西南石油大学 | A kind of borehole wall eyelid retractor for oil/gas well self-advancing type water-jet |
| CN112211587A (en) * | 2019-07-10 | 2021-01-12 | 中国石油天然气股份有限公司 | Packer (CN) |
| CN112211587B (en) * | 2019-07-10 | 2022-08-05 | 中国石油天然气股份有限公司 | Packer (CN) |
| CN110566144A (en) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| CN110566144B (en) * | 2019-09-27 | 2021-08-17 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
| RU199106U1 (en) * | 2020-05-28 | 2020-08-17 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Hydraulic packer valve |
| CN114439432A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Hydraulic shaping, filling and sand prevention integrated pipe column and method |
| CN114439432B (en) * | 2020-10-20 | 2024-03-22 | 中国石油化工股份有限公司 | Hydraulic shaping, filling and sand prevention integrated pipe column and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
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| CX01 | Expiry of patent term |