CN201908636U - Multi-functional eccentric separated-injection packing water distributor - Google Patents
Multi-functional eccentric separated-injection packing water distributor Download PDFInfo
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- CN201908636U CN201908636U CN2010205862346U CN201020586234U CN201908636U CN 201908636 U CN201908636 U CN 201908636U CN 2010205862346 U CN2010205862346 U CN 2010205862346U CN 201020586234 U CN201020586234 U CN 201020586234U CN 201908636 U CN201908636 U CN 201908636U
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Abstract
The utility model relates to a multi-functional eccentric separated-injection packing water distributor, which comprises an upper joint. An outer screw thread of the lower end of the upper joint is connected with an upper outer pipe, an inner screw thread of the lower end of the upper joint is connected with an inner guide cylinder, the inner guide cylinder and the lower end of the upper outer pipe are respectively connected with an eccentrically integrated main body, the eccentrically integrated main body takes the shape of a hollow pipe, the lower end of the eccentrically integrated main body is connected with a rubber cylinder packer, a double-mouth blanking plug is eccentrically arranged in the eccentrically integrated main body, a center hole of the eccentrically integrated main body are correspondingly communicated with two water inlets arranged on the double-mouth blanking plug, the double-mouth blanking plug is provided with two water outlets corresponding to the two water inlets, the two water outlets are respectively communicated with the upper part and the lower part of an expanding rubber cylinder of the rubber cylinder packer in a corresponding way. The multi-functional eccentric separated-injection packing water distributor realizes the subdivision and the test for a plurality of thin sandwiches and improves the precision rate of testing, the allocation efficiency and the throwing-in and pulling efficiency. The multi-functional eccentric separated-injection packing water distributor can be used in the operations of packing and water distributing for separated layer water injection in the oil field.
Description
Technical field
The utility model relates to a kind of packing, water distribution instrument of water injection well in oil fields seperated layer water injection.
Background technology
The vertical oil reservoir in oil field, Jiangsu is many, contain the oil well segment length, have characteristics such as the interlayer physical difference is big, interlayer is thin, along with going deep into of exploitation, interlayer contradiction is serious day by day, interlayer reserves producing status difference strengthens, in order to improve waterflooding development effect, the problem of the subdivision injection of short lap (less than 5 meters) exploitation is badly in need of solving in the oil reservoir.
The subject matter that the most frequently used eccentric injection mandrel of separated-zone water infection oil field exists: a plurality of short lap segmentations of incompatibility, the injection well downhole flow regulator spacing must could guarantee the reliable and accurate of pulling and test greater than 8 meters; The test accuracy rate is low, causes water filling allotment difficulty; Pulling efficient is low, testing efficiency is low, the demand of the frequent allotment of incompatibility dispensing well.In recent years, also developed the bridge-type eccentric dispensing, exempted to throw dead mouth, technology such as allotment are exempted from constant current, make the efficient and the accuracy of test allotment obtain certain raising.
From the process characteristic analysis, some has changed the eccentric testing mode these new technologies, not the eccentric zonal injection technology on the absolute sense, as the double-deck eccentric injection mandrel (patent No. ZL200520021400.7) of water channeling type, combine the measuring technology of concentric integrated technique, be divided into two cover testers, once finish the independent flow of 2～4 intervals, pressure test, increased the input cost of instrument and equipment greatly.
From the zonal testing angle analysis, can not satisfy dispensing well more than 4 layers, under same water filling state, enroll the requirement of zonal flow rate, pressure parameter; As a kind of eccentric center water-distributing packer (patent No. ZL200720084806.9), join main body partially passageway bridge is not set, in the time of can dividing 4 layers with two water distribution packers, 3～4 layers will stop water filling when testing 1～2 layer, cause 4 laminar flow amounts, pressure data in same state admission; Such technology has only been carried out bench-scale testing for this reason, is difficult to large scale application.
The utility model content
The purpose of this utility model provides a kind of multi-functional eccentric dispensing packing injection well downhole flow regulator, make it take into account the advantage of conventional eccentric technology and do not change pulling and the prerequisite of zonal testing mode under, realize a plurality of short lap subdivision injections, improve each single-interval test accuracy rate and allotment efficient.
The purpose of this utility model is achieved in that a kind of multi-functional eccentric dispensing packing injection well downhole flow regulator, comprise top connection, top connection lower end external screw thread is connected with upper exterior tube, top connection lower end internal thread is connected with interior guide cylinder, interior guide cylinder is connected with eccentric integrated entity respectively with the upper exterior tube lower end, eccentric integrated entity is hollow tubular, eccentric integrated entity lower end is connected with Tubing Packer, off-centre is provided with two mouth blanking plugs in the described eccentric integrated entity, the corresponding connection of two-way water inlet that is provided with on the centre bore of eccentric integrated entity and pair mouth blanking plugs, be provided with the two-way delivery port on two mouth blanking plugs with in water inlet is corresponding one by one, corresponding respectively expansion packing element top and the expansion packing element below that is communicated to Tubing Packer of described two-way delivery port.
During the utility model work, by top connection device is connected on the tubing string, during Tubing Packer seat envelope, can realize sealing the minimum span 2m of card with interior short lap by two mouth blanking plugs respectively to the stratum water filling of the stratum of expanding the packing element top and expansion packing element below.This device can multistage assembly be realized depositing; Can measure flow, the pressure data of two intervals simultaneously, testing efficiency improves 2 times, can realize stopping layer and not stop the well function, does not influence other layer water filling when testing certain layer, improves test accuracy; After the tubing string release, the expansion packing element reclaims and can carry out anti-flushing well.Compared with prior art, the utility model is kept pulling and zonal testing mode and every advantage of conventional eccentric technology, can simplify conventional eccentric, the bridge-type eccentric zonal injection technology of existing use comprehensively.This device is used for packing, the water distribution operation of water injection well in oil fields seperated layer water injection.
In the utility model, can connect in the following way between eccentric integrated entity and the Tubing Packer: promptly be provided with the two-stage step in eccentric integrated entity lower end, be respectively equipped with large-diameter thread and small-diameter thread on the described two-stage step, large-diameter thread is connected with lower linking tube, small-diameter thread links to each other with interior connecting leg, the lower linking tube lower end is connected with middle connecting leg, middle connecting leg lower end is connected with lower contact, upper jacket, the lower jacket that expansion packing element and two ends thereof are provided with is sleeved on outside the middle connecting leg, the upper jacket upper end is tightly connected with middle connecting leg, and lower jacket and lower contact are tightly connected; Interior connecting leg lower end and lower contact are tightly connected; Lower contact is provided with the space between interior connecting leg lower end of inner passage connection and the expansion packing element inboard; Described lower contact be provided with exhalant canal radially connect in space between connecting leg and the middle connecting leg, the upper end, space between interior connecting leg and the middle connecting leg is connected with one road delivery port of two mouth blanking plugs.
Described pair of mouth blanking plug can have following structure: described pair of mouth blanking plug comprises the locking fishing head, locking fishing head bottom be linked in sequence eccentric body one and eccentric body two, eccentric body one and eccentric body two outer four roads that are provided with altogether seal, be respectively equipped with water nozzle in eccentric body one and the eccentric body two, the bottom of eccentric body two is provided with pressure cap, pressure cap is provided with down water inlet, following water inlet is connected through the water nozzle of bottom and the lower outlet radially on the eccentric body two, also be provided with last water inlet radially on the eccentric body two, last water inlet is through the water nozzle connection upper water-out mouth radially on top, described lower outlet, last water inlet, the upper water-out mouth lays respectively between the adjacent two seals; Eccentric integrated entity side is provided with the upper water-out passage and the upper water-out mouth is connected, eccentric integrated entity inside is provided with the following exhalant canal that axially parallels with it, lower outlet is connected on following exhalant canal top, the space in following exhalant canal bottom is connected between connecting leg and the middle connecting leg.
For avoiding stratum silt to be back in the tubing string, described upper water-out passage and radially be respectively equipped with one way valve in the exhalant canal.Unobstructed for guaranteeing water outlet, upper water-out passage, following exhalant canal are arranged with two respectively, and corresponding one way valve is provided with four altogether.
For increasing the multifunctionality of device, eccentric integrated entity is provided with at least one parallel with center line and accessory channel that run through eccentric integrated entity.Described accessory channel can be circular hole or mounting hole.The space between upper exterior tube and the interior guide cylinder is connected in the accessory channel upper end, and water inlet is down connected in the lower end, when eccentric integrated entity centre bore stops up, still can intake by accessory channel, has guaranteed the dependability of device.
The passage of the centre bore of described eccentric integrated entity and last water inlet, the corresponding connection of water inlet down is cannelure or circular hole radially.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation of two mouth blanking plugs among Fig. 1.
Fig. 3 is the A-A profile of Fig. 1.
Fig. 4 is the B-B profile of Fig. 1.
Fig. 5 is the C-C profile of Fig. 1.
Fig. 6 is the D-D profile of Fig. 1.
Wherein, 1 top connection, 2 interior guide cylinders, 201 axial grooves, 3 upper exterior tubes, 4 pairs of mouth blanking plugs, 401 locking fishing heads, 402 eccentric bodies one, 403 upper water-out mouths, water nozzle on 404, water inlet on 405,406 eccentric bodies, two, 407 lower outlets, 408 times water nozzles, 409 pressure caps, 410 times water inlets, 411 sealings, 5 eccentric integrated entities, 501 accessory channels, 502 times exhalant canals, 503 eccentric orfices, 601,602 cannelures, 7 fairleads, 8 lower linking tubes, connecting legs in 9, connecting leg in 10,11 upper jackets, 12 expansion packing elements, 13 lower jackets, 14 exhalant canals radially go out water one-way valve, 16 lower contacts 15 times, 1601 inner passages, 17 annular spaces, 18 centre bores, 19 screws, 20 upper water-out passages, 21 upper water-out one way valves.
The specific embodiment
As shown in the figure, be multi-functional eccentric dispensing packing injection well downhole flow regulator, its upper end is provided with top connection 1, top connection 1 is used for linking to each other with tubing string, and top connection 1 lower end external screw thread is connected with upper exterior tube 3, and top connection 1 lower end internal thread is connected with interior guide cylinder 2, interior guide cylinder 2 is connected with eccentric integrated entity respectively with upper exterior tube 3 lower ends, wherein, interior guide cylinder 2 is connected through screw 19 with eccentric integrated entity 5 ends, between upper exterior tube 3 lower ends and the eccentric integrated entity 5 through being threaded; Eccentric integrated entity 5 is hollow tubular, its center is provided with centre bore 18, eccentric integrated entity 5 lower ends are connected with Tubing Packer, off-centre is provided with eccentric orfice 503 in the eccentric integrated entity, cooperate in this eccentric orfice 503 two mouth blanking plugs 4 are installed, the two-way water inlet of setting is through cannelure 601,602 corresponding connections on the centre bore 18 of eccentric integrated entity 5 and the two mouth blanking plugs 4, be provided with the two-way delivery port on two mouth blanking plugs 4 with in water inlet is corresponding one by one, be respectively upper water-out mouth 403, lower outlet 407; Corresponding respectively expansion packing element 12 tops and expansion packing element 12 belows that are communicated to Tubing Packer of two-way delivery port.
Eccentric integrated entity 5 lower ends are provided with the two-stage step, be respectively equipped with large-diameter thread and small-diameter thread on the described two-stage step, described large-diameter thread is connected with lower linking tube 8, small-diameter thread links to each other with interior connecting leg 9, lower linking tube 8 lower ends are connected with middle connecting leg 10, and middle connecting leg 10 lower ends are connected with lower contact 16, and upper jacket 11, the lower jacket 13 that expansion packing element 12 and two ends thereof are provided with is sleeved on outside the middle connecting leg, upper jacket 11 upper ends and middle connecting leg 10 are tightly connected, and lower jacket 13 is tightly connected with lower contact 16; Interior connecting leg 9 lower ends and lower contact 16 are tightly connected; Lower contact 16 is provided with the space between interior connecting leg lower end of 1601 connections, inner passage and the expansion packing element inboard; Lower contact 16 be provided with exhalant canal radially 14 connect in annular space 17 between connecting leg and the middle connecting leg, the upper end, space between interior connecting leg and the middle connecting leg is connected with the lower outlet 407 of two mouth blanking plugs 4.
The structure of two mouth blanking plugs 4 is as follows: it mainly comprises locking fishing head 401, locking fishing head 401 bottoms be linked in sequence eccentric body 1 and eccentric body 2 406, eccentric body 1 and eccentric body 2 406 outer four roads that are provided with altogether seal 411, be respectively equipped with water nozzle in eccentric body 1 and the eccentric body 2 406, be positioned at the last water nozzle 404 that is on upper strata, be positioned at the following water nozzle 408 that is of lower floor; The bottom of eccentric body 2 406 is provided with pressure cap 409, pressure cap 409 is provided with down water inlet 410, following water inlet 410 is connected with the lower outlet radially 407 on the eccentric body 2 406 through the following water nozzle 408 of bottom, also be provided with last water inlet 405 radially on the eccentric body 2 406, the upper water-out mouth 403 that last water inlet 405 is connected radially through last water nozzle 404, lower outlet 407, last water inlet 405, upper water-out mouth 403 lay respectively between the adjacent two seals 411; Eccentric integrated entity 5 sides are provided with upper water-out passage 20 and connect with upper water-out mouth 403, eccentric integrated entity 5 inside are provided with the following exhalant canal 502 that axially parallels with it, lower outlet 407 is connected on following exhalant canal 502 tops, the annular space 17 in the bottom is connected between connecting leg and the middle connecting leg.
20 are provided with upper water-out one way valve 21 in the upper water-out passage, radially are provided with down water one-way valve 15 in the exhalant canal 14; Upper water-out passage 20 and radially exhalant canal 14 be arranged with two respectively, corresponding one way valve is provided with four altogether, is respectively under two upper water-out one way valves and two to go out water one-way valve.
Eccentric integrated entity 5 is provided with accessory channel 501 parallel with center line and that run through eccentric integrated entity; Accessory channel 501 can be circular hole or mounting hole, as shown in the figure, is a special case, and accessory channel is symmetrically arranged six circular holes.
During this device water filling, current are divided into two-way from eccentric integrated entity, and wherein one tunnel route is: the stratum of eccentric integrated entity 5 → cannelure 601 → last water inlet 405 → last water nozzle 404 → upper water-out mouth 403 → upper water-out one way valve 21 → upper water-out passage 20 → expansion packing element top; Another road route is: the stratum below the exhalant canal 14 → expansion packing element of eccentric integrated entity 5 → cannelure 602 → following water inlet 410 → following water nozzle 408 → lower outlet 407 → following exhalant canal 502 → annular space 17 → go out down water one-way valve 15 → radially.
Can organize series connection when this device uses more, form the multistage water injection tubing string.Be example now with three grades four layers.
The separate injection tubing string structure: oil pipe+eccentric dispensing packing injection well downhole flow regulator+oil pipe+inflatable packer+oil pipe+eccentric dispensing packing injection well downhole flow regulator+oil pipe+formations such as bottom valve gets final product by in the working design order lower going-into-well.
Seperated layer water injection:
When coming water, well head passes through the up and down centre bore of the eccentric integrated entity of two-stage, through last inlet opening, the inlet opening is respectively to first floor, the second layer, the 3rd layer and the 4th layer of water filling down; When the centre bore of higher level's eccentric integrated entity is blocked, come water to pass through the accessory channel that around central passage, is provided with, can be normally to third and fourth layer water filling.
Packer seat, deblocking:
Because water produces the expansion packing element expansion that certain pressure reduction makes packer when two mouth blanking plug, it is packer set that three packers are divided into four sections with pit shaft; When pressure reduction was disengaged, it was the packer deblocking that the packing element retraction is discharged the water that enters.
Well-flushing:
Well-flushing water is entered and descending by the oil jacket annular space, and upper and lower water outlet closed check valve is exhalant canal radially, allows the well-flushing water bottom valve that continues to pass through down enter in the oil pipe, and oil reservoir place oil jacket annular space is thoroughly cleaned, and has guaranteed the true and accurate of isotope test.
Zonal testing:
Tester servant and by upper and lower two-stage off-centre dispensing packing injection well downhole flow regulator in the oil pipe, on carry the centre bore that tester is crossed eccentric integrated entity, locating detent on the tester is released, locating detent when transferring on the tester obtains to support in interior connecting leg, seal section is separated corresponding water inlet, and tester can obtain the flow and the pressure data of different layers respectively.
This device can be realized stopping layer and not stop the well function, does not influence other layer water filling when testing certain layer, improves test accuracy.Simultaneously, also have and exempt to throw dead mouth function, packing element reclaims and can carry out anti-flushing well after the tubing string release.The setting of single time valve can prevent from that stratum silt from returning from outlet passage to tell in the tubing string, guarantees the complete cleaning of bottom oil reservoir mineshaft annulus passage, has improved the accuracy of isotope test.This device has been kept pulling and zonal testing mode and every advantage of conventional eccentric technology, can simplify conventional eccentric, the bridge-type eccentric zonal injection technology of existing use comprehensively.
The utility model is not limited to the foregoing description; on the aim of technical solutions of the utility model; can make the replacement of equivalence and tangible architecture advances to corresponding construction of the present utility model, these improvement and substituting have also all fallen in the protection domain of the present utility model.
Claims (6)
1. multi-functional eccentric dispensing packing injection well downhole flow regulator, it is characterized in that: comprise top connection, top connection lower end external screw thread is connected with upper exterior tube, top connection lower end internal thread is connected with interior guide cylinder, interior guide cylinder is connected with eccentric integrated entity respectively with the upper exterior tube lower end, eccentric integrated entity is hollow tubular, eccentric integrated entity lower end is connected with Tubing Packer, off-centre is provided with two mouth blanking plugs in the described eccentric integrated entity, the corresponding connection of two-way water inlet that is provided with on the centre bore of eccentric integrated entity and pair mouth blanking plugs, be provided with the two-way delivery port on two mouth blanking plugs with in water inlet is corresponding one by one, corresponding respectively expansion packing element top and the expansion packing element below that is communicated to Tubing Packer of described two-way delivery port.
2. multi-functional eccentric dispensing packing injection well downhole flow regulator according to claim 1, it is characterized in that: eccentric integrated entity lower end is provided with the two-stage step, be respectively equipped with large-diameter thread and small-diameter thread on the described two-stage step, large-diameter thread is connected with lower linking tube, small-diameter thread links to each other with interior connecting leg, the lower linking tube lower end is connected with middle connecting leg, middle connecting leg lower end is connected with lower contact, upper jacket, the lower jacket that expansion packing element and two ends thereof are provided with is sleeved on outside the middle connecting leg, the upper jacket upper end is tightly connected with middle connecting leg, and lower jacket and lower contact are tightly connected; Interior connecting leg lower end and lower contact are tightly connected; Lower contact is provided with the space between interior connecting leg lower end of inner passage connection and the expansion packing element inboard; Described lower contact be provided with exhalant canal radially connect in space between connecting leg and the middle connecting leg, the upper end, space between interior connecting leg and the middle connecting leg is connected with one road delivery port of two mouth blanking plugs.
3. multi-functional eccentric dispensing packing injection well downhole flow regulator according to claim 1 and 2, it is characterized in that: described pair of mouth blanking plug comprises the locking fishing head, locking fishing head bottom be linked in sequence eccentric body one and eccentric body two, eccentric body one and eccentric body two outer four roads that are provided with altogether seal, be respectively equipped with water nozzle in eccentric body one and the eccentric body two, the bottom of eccentric body two is provided with pressure cap, pressure cap is provided with down water inlet, following water inlet is connected through the water nozzle of bottom and the lower outlet radially on the eccentric body two, also be provided with last water inlet radially on the eccentric body two, last water inlet is through the water nozzle connection upper water-out mouth radially on top, described lower outlet, last water inlet lays respectively between the adjacent two seals; Eccentric integrated entity side is provided with the upper water-out passage and the upper water-out mouth is connected, eccentric integrated entity inside is provided with the following exhalant canal that axially parallels with it, lower outlet is connected on following exhalant canal top, the space in following exhalant canal bottom is connected between connecting leg and the middle connecting leg.
4. multi-functional eccentric dispensing packing injection well downhole flow regulator according to claim 3, it is characterized in that: eccentric integrated entity is provided with at least one parallel with center line and accessory channel that run through eccentric integrated entity.
5. multi-functional eccentric dispensing packing injection well downhole flow regulator according to claim 4, it is characterized in that: described accessory channel is circular hole or mounting hole.
6. multi-functional eccentric dispensing packing injection well downhole flow regulator according to claim 3 is characterized in that: the passage of the centre bore of described eccentric integrated entity and last water inlet, the corresponding connection of water inlet down is cannelure or circular hole radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205862346U CN201908636U (en) | 2010-11-02 | 2010-11-02 | Multi-functional eccentric separated-injection packing water distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205862346U CN201908636U (en) | 2010-11-02 | 2010-11-02 | Multi-functional eccentric separated-injection packing water distributor |
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| CN201908636U true CN201908636U (en) | 2011-07-27 |
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| CN2010205862346U Expired - Fee Related CN201908636U (en) | 2010-11-02 | 2010-11-02 | Multi-functional eccentric separated-injection packing water distributor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797430A (en) * | 2012-09-07 | 2012-11-28 | 马中原 | Plugging device for water distributor |
| CN103352674A (en) * | 2013-08-01 | 2013-10-16 | 中国石油化工股份有限公司 | Upper-layer adjustable plugging device |
| CN107120079A (en) * | 2017-06-14 | 2017-09-01 | 中国石油天然气股份有限公司 | Throwing and fishing type back flushing valve |
| CN107701155A (en) * | 2017-10-13 | 2018-02-16 | 中国石油化工股份有限公司 | Intelligence control formula in underground insulates injection allocation apparatus |
| CN108386155A (en) * | 2018-02-07 | 2018-08-10 | 中国石油天然气股份有限公司 | Double-eccentric integrated packer for water injection well of oil field |
| CN111322042A (en) * | 2020-04-17 | 2020-06-23 | 四川省科学城久利电子有限责任公司 | Water distribution system for flow control and water injection measurement of first-level double strata of oil field |
| CN113356812A (en) * | 2021-07-09 | 2021-09-07 | 中国石油化工股份有限公司 | Coaxial driving step-by-step adjustable double-layer plug |
| CN113863905A (en) * | 2021-10-18 | 2021-12-31 | 中国石油化工股份有限公司 | Eccentric subdivision self-testing packing injection allocation device |
| CN117967259A (en) * | 2024-03-29 | 2024-05-03 | 西安洛科电子科技股份有限公司 | Wave code intelligent split injection instrument capable of retesting |
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2010
- 2010-11-02 CN CN2010205862346U patent/CN201908636U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797430B (en) * | 2012-09-07 | 2014-10-29 | 马中原 | Plugging device for water distributor |
| CN102797430A (en) * | 2012-09-07 | 2012-11-28 | 马中原 | Plugging device for water distributor |
| CN103352674A (en) * | 2013-08-01 | 2013-10-16 | 中国石油化工股份有限公司 | Upper-layer adjustable plugging device |
| CN107120079A (en) * | 2017-06-14 | 2017-09-01 | 中国石油天然气股份有限公司 | Throwing and fishing type back flushing valve |
| CN107120079B (en) * | 2017-06-14 | 2020-09-18 | 中国石油天然气股份有限公司 | Throwing and fishing type back flushing valve |
| CN107701155A (en) * | 2017-10-13 | 2018-02-16 | 中国石油化工股份有限公司 | Intelligence control formula in underground insulates injection allocation apparatus |
| CN108386155B (en) * | 2018-02-07 | 2020-09-18 | 中国石油天然气股份有限公司 | Double-eccentric integrated packer for water injection well of oil field |
| CN108386155A (en) * | 2018-02-07 | 2018-08-10 | 中国石油天然气股份有限公司 | Double-eccentric integrated packer for water injection well of oil field |
| CN111322042A (en) * | 2020-04-17 | 2020-06-23 | 四川省科学城久利电子有限责任公司 | Water distribution system for flow control and water injection measurement of first-level double strata of oil field |
| CN113356812A (en) * | 2021-07-09 | 2021-09-07 | 中国石油化工股份有限公司 | Coaxial driving step-by-step adjustable double-layer plug |
| CN113863905A (en) * | 2021-10-18 | 2021-12-31 | 中国石油化工股份有限公司 | Eccentric subdivision self-testing packing injection allocation device |
| CN113863905B (en) * | 2021-10-18 | 2024-03-26 | 中国石油化工股份有限公司 | Eccentric subdivision self-testing packing injection allocation device |
| CN117967259A (en) * | 2024-03-29 | 2024-05-03 | 西安洛科电子科技股份有限公司 | Wave code intelligent split injection instrument capable of retesting |
| CN117967259B (en) * | 2024-03-29 | 2024-06-07 | 西安洛科电子科技股份有限公司 | Wave code intelligent split injection instrument capable of retesting |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20191102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |