CN202707018U - Bridge type eccentric overflowing water distributor and blanking plug thereof - Google Patents
Bridge type eccentric overflowing water distributor and blanking plug thereof Download PDFInfo
- Publication number
- CN202707018U CN202707018U CN 201220367600 CN201220367600U CN202707018U CN 202707018 U CN202707018 U CN 202707018U CN 201220367600 CN201220367600 CN 201220367600 CN 201220367600 U CN201220367600 U CN 201220367600U CN 202707018 U CN202707018 U CN 202707018U
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- water
- blanking plug
- plunger shaft
- injection well
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- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims description 55
- 239000007924 injection Substances 0.000 claims description 55
- 210000002445 nipple Anatomy 0.000 claims description 25
- 238000012360 testing method Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 5
- -1 and setting Substances 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 241000283216 Phocidae Species 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The utility model relates to a bridge type eccentric overflowing water distributor and a blanking plug thereof. The bridge type eccentric overflowing water distributor comprises a working barrel main body of which the center is provided with a main passage, wherein an eccentric hole is axially formed in a tubular wall of the working barrel main body; the blanking plug is arranged in the eccentric hole, and comprises a water inlet chamber segment and a water outlet chamber segment from bottom to top; the water inlet chamber segment is communicated with the water outlet chamber segment through a piston chamber segment; and a temporary plugging piston is sealed in the piston chamber segment, and is fixedly connected together with a sealing body of the blanking plug through a shear pin which is radially arranged and can be cut off by ultimate water pressure. In the process of water filling operation, filled water reaches a lower end of the temporary plugging piston from the water inlet chamber, when filled water pressure achieves certain pressure, the shear pin is cut off, the temporary plugging piston is moved up, plugging seal is released, the water filling passage is opened to fill water, and setting, water filling and test are realized by using one tubular column, so that the times of dropping and fishing dead mouthpieces are reduced, the risk of operation barrier is lowered, and the reliability of the bridge type eccentric overflowing water distributor is improved.
Description
Technical field
The utility model relates to the oilfield exploitation technical field, and particularly a kind of blanking plug that is installed in the bridge type eccentric injection mandrel simultaneously, also relates to a kind of bridge-type eccentric overcurrent injection well downhole flow regulator.
Background technology
In the oil-field flooding process, adopt eccentric injection mandrel to cooperate with packer and carry out seperated layer water injection, for findding out the seperated layer water injection situation, the general double containment section conflux formula three parameter testing instruments that adopt are tested envelope and admission individual layer water filling data to individual layer, need supporting bridge type eccentric injection mandrel, the bridge-type by-pass prot of this injection well downhole flow regulator is used for the upper and lower pressure of balance performance monitor, can improve the safety factor of pulling process, in addition, the bridge-type by-pass prot can also be to the normal water filling of lower floor, full well duty does not change, and is conducive to reflect the true water filling situation of individual layer.
Chinese patent ZL00239162.7 discloses the dual-purpose product of joining of a kind of oil-water well, hydrophone (below be the description of using for as injection well downhole flow regulator), it is mainly by seating nipple, blanking plug and testing seal section form, seating nipple is mainly by top connection, upper seating nipple, centralizer body, the seating nipple main body, lower seating nipple, support, guide way and lower contact form, the center of seating nipple main body is provided with the main channel, axially be provided with inclined to one side hole and by-pass prot in the sidewall of seating nipple main body, the hole is communicated with the main channel by a hole on its sidewall partially, the inlet of the corresponding blanking plug in this hole, water inlet when being used for the water filling operation, partially also be provided with on the sidewall in hole and be communicated with oil, the liquid outlet groove in collar-shaped space, during work, testing seal section places in the main channel of seating nipple main body, and blanking plug places inclined to one side hole.Blanking plug mainly is comprised of fishing rod, gland, stage clip, supporting seat and seal section, the supporting seat overhead cam is disposed thereon by camshaft and torsion spring, fishing rod is connected to the supporting seat upper end, and seal section is connected to the supporting seat lower end, and the lower end of seal section is connected with guide head.The seal section outside is provided with three group of six road " O " shape sealing ring, three groups of sealing rings are divided into seal section inside with inclined to one side hole and are provided with axial pass trough, the position installing profit mouth of one group of sealing ring in the middle of corresponding in the axial pass trough, on the profit mouth is divided into axial pass trough, lower two parts, sidewall at upper axial pass trough offers liquid outlet, be used for being communicated with the liquid outlet groove on the seating nipple main body, sidewall at lower axial groove offers inlet, be used for being communicated with the main channel of seating nipple main body, during the water filling operation, injected water passes through the main channel, the blanking plug inlet, the profit mouth, the blanking plug liquid outlet, the liquid outlet groove of seating nipple main body enters oil, collar-shaped is injected the stratum behind the space.
Adopt this injection well downhole flow regulator, behind the operation lower tubular column, before the water testing, blanking plug need to be thrown upper dead mouthpiece and carry out plug for seal, treat that tubing string builds the pressure after the set packer, lower steel wire is pulled blanking plug out, and the mouthpiece of checkmating is replaced with water nozzle, and then lower steel wire drops into blanking plug, so not only increased throwing, dragged for testing time, also increased the wire Launching and Bailing workload and met the card risk.
The utility model content
The purpose of this utility model provides a kind of blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator, with solve in the prior art blanking plug need to change dead mouthpiece, pulling often, meet the technical problem that the card risk increases.Simultaneously, the utility model also provides a kind of bridge-type eccentric overcurrent injection well downhole flow regulator that adopts this blanking plug.
To achieve these goals, the blanking plug of a kind of bridge-type eccentric overcurrent injection well downhole flow regulator of the present utility model adopts following technical scheme:
A kind of blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator, comprise the intake antrum section and the water chamber section that arrange from bottom to top, described intake antrum section is communicated with by the plunger shaft section with the water chamber section, sealing is provided with the temporarily stifled piston that can be pushed into the water chamber section in the plunger shaft section, temporarily stifled piston is fixed together by the shear pin of radially setting and the chamber wall of plunger shaft section, and described shear pin can be cut off when injection hydraulic pressure reaches the shear pin yield shear stress.
The water nozzle of blanking plug is installed between intake antrum section and the plunger shaft section, and the intake antrum section is communicated with the plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle is less than the gross area of the delivery port of water chamber section.
Described water chamber section and plunger shaft section are located in the seal of blanking plug, and the lower end of seal is connected with filter screen set, and it is stifled that the lower end of filter screen set is provided with the end, and the stifled external surface in the end is provided with for the sealing ring that is sealed and matched with the inclined to one side hole of injection well downhole flow regulator; Described filter screen set forms the intake antrum section, and the worry hole of filter screen set forms the water inlet of intake antrum section.
Described temporarily stifled piston is sealed and matched by sealing ring and the plunger shaft section internal face that is arranged on its side face.
A kind of bridge-type eccentric overcurrent injection well downhole flow regulator of the present utility model adopts following technical scheme:
A kind of bridge-type eccentric overcurrent injection well downhole flow regulator, comprise that the center has the seating nipple main body of main channel, seating nipple main body tube wall axis is to being provided with inclined to one side hole, partially be equipped with blanking plug in the hole, this blanking plug comprises intake antrum section and the water chamber section that arranges from bottom to top, described intake antrum section is communicated with by the plunger shaft section with the water chamber section, sealing is provided with the temporarily stifled piston that can be pushed into the water chamber section in the plunger shaft section, temporarily stifled piston is fixed together by the shear pin of radially setting and the chamber wall of plunger shaft section, and described shear pin can be cut off when injection hydraulic pressure reaches the shear pin yield shear stress.
The water nozzle of blanking plug is installed between intake antrum section and the plunger shaft section, and the intake antrum section is communicated with the plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle is less than the gross area of the delivery port of water chamber section.
Described water chamber section and plunger shaft section are located in the seal of blanking plug, and the lower end of seal is connected with filter screen set, and it is stifled that the lower end of filter screen set is provided with the end, and the stifled external surface in the end is provided with for the sealing ring that is sealed and matched with the inclined to one side hole of injection well downhole flow regulator; Described filter screen set forms the intake antrum section, and the worry hole of filter screen set forms the water inlet of intake antrum section.
Described temporarily stifled piston is sealed and matched by sealing ring and the plunger shaft section internal face that is arranged on its side face.
Lower end, described inclined to one side hole is provided with the bottom opening that is communicated with the main channel.
Blanking plug of the present utility model, because temporarily stifled piston being set in the plunger shaft section between intake antrum section and water chamber section, when test, temporary stifled piston shutoff waterflood path, thus can realize the tubing string set packer that builds the pressure; After being completed, when carrying out the water filling operation, injected water arrives temporarily stifled piston lower end by intake antrum, when injected water pressure reaches the yield shear stress of shear pin, shear pin is cut off, move on in the water chamber on the temporarily stifled piston, remove plug for seal, open waterflood path and realize water filling, finish set, water filling, test one-trip string realize, reduce the number of times of the dead mouthpiece of pulling, reduced the operation risk that is hampered, improved the reliability of bridge-type eccentric overcurrent injection well downhole flow regulator.This temporary bridging structure is simple, is easy to realize.
In the utility model, the cross-sectional area of the water hole of blanking plug water nozzle is less than the gross area of the delivery port of water chamber section, guaranteed not throttling in normal the injecting process, in addition, also guarantee in the injecting process, to block up temporarily the top that piston is not pushed to the water chamber section, make the upper surface of temporarily stifled piston and the top of water chamber section keep certain distance, like this, when water injection pressure is reduced to less than quilt notes stratum hydraulic pressure or stops annotating, temporarily stifled piston can reset under the effect of being annotated stratum hydraulic pressure, the shutoff waterflood path, thus prevent that formation water from refluxing.
Bridge-type eccentric overcurrent injection well downhole flow regulator of the present utility model arranges opening in bottom, inclined to one side lower end, hole, after entering the inclined to one side hole of blanking plug, impurity in the tubing string can enter by the opening of bottom the tubing string bottom, impurity can not appear, dirt stops up inclined to one side hole makes blanking plug throw problem not in place, the application life of greatly having improved bridge-type eccentric overcurrent injection well downhole flow regulator.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of blanking plug of the utility model bridge-type eccentric overcurrent injection well downhole flow regulator;
Fig. 2 is the structural representation of a kind of embodiment of the utility model bridge-type eccentric overcurrent injection well downhole flow regulator;
Fig. 3 is A-A cross sectional view among Fig. 2.
The specific embodiment
The embodiment of the blanking plug of the bridge-type eccentric overcurrent injection well downhole flow regulator that the utility model provides is as follows:
Embodiment 1
The blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator shown in Figure 1, it comprises fishing head 22, gland 23, O type cushion rubber 24,30,32,34, stage clip 25, torsion spring 26, camshaft 27, cam 28 and seal 29, be provided with the axial upwardly extending inner chamber in self sealss body lower surface in the described seal, the top of inner chamber is the water chamber section, the spaced apart delivery port that is provided with in the circumferential direction of the circle on water chamber section sidewall, it is the plunger shaft section below the water chamber section, sealing is provided with temporarily stifled piston 33 in the plunger shaft section, temporarily stifled piston is fixed together by the shear pin 31 of radially setting and the chamber wall of plunger shaft section, described shear pin 31 can be cut off when hydraulic pressure reaches the shear pin yield shear stress injecting, and stifled piston 33 is sealed and matched by the chamber wall that is arranged on sealing ring 32 and plunger shaft section on its side face temporarily.
The lower end of seal 29 is connected with filter screen set 20, the lower end of filter screen set is connected with the end stifled 36, filter screen set has formed the intake antrum section of blanking plug, between intake antrum section and plunger shaft section, be provided with water nozzle 35, the intake antrum section is communicated with the plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle 35 is sealed and matched by sealing ring 34 between water nozzle and the sealed body cavity wall less than the gross area of the delivery port of water chamber section.The elongated worry hole of extending vertically of offering on the perisporium of filter screen set 20 has formed the water inlet of blanking plug.
Blanking plug is provided with the six groups of sealing rings in three roads, wherein, upper and lower in delivery port on the seal outer peripheral face is provided with two group of four road sealing ring 30, and stifled 36 side face is provided with one group of two seals circle the end of at, and blanking plug is sealed and matched by this three group of six road sealing ring and the inclined to one side hole of injection well downhole flow regulator.
This blanking plug is when using, and in test jobs, water nozzle 35 to the passage of water chamber section delivery port is blocked up piston 33 obstructions temporarily, realizes building the pressure test; When needs are implemented the water filling operation, injected water arrives temporarily stifled piston lower end by the blanking plug water inlet through water nozzle, when the injected water pressure of temporarily stifled piston 33 lower ends reaches the yield shear stress of shear pin, shear pin 31 is cut off, move on in the water chamber on the temporarily stifled piston, thereby open water nozzle to the passage of delivery port and remove plug for seal, realize water filling, finish set, water filling, test one-trip string realize.
Embodiment 2:
A kind of blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator, the difference of itself and embodiment 1 is: the intake antrum section also is arranged in the seal, water inlet is arranged on the sidewall of intake antrum section, circumferencial direction interval along intake antrum section sidewall arranges, the stifled lower end that directly is connected to seal, the end, in this structure, the two seals circle on the stifled outer peripheral face in the end also can be arranged on the seal on the position of water inlet below.The difference of the present embodiment and embodiment 1 is less, therefore omit its accompanying drawing.
The embodiment of the utility model bridge-type eccentric overcurrent injection well downhole flow regulator is as follows:
Fig. 2, bridge-type eccentric overcurrent injection well downhole flow regulator shown in Figure 3, comprise seating nipple and blanking plug 9, seating nipple is to be made of the top connection 1 that is threaded successively from top to bottom, upper steel bushing 3, seating nipple main body 4, lower steel bushing 5 and lower contact 8, and the connection of thread of adjacent component is respectively equipped with hermetically-sealed construction; Be fitted with centralizer body 2 in the endoporus of upper steel bushing 3, centralizer body 2 is fixedly connected with by bolt 17 screw threads with the top end face of seating nipple main body 4; Screw thread is connected with support 6 in the lower end of seating nipple main body 4, and the lower end of support 6 is connected with guide way 7; The center of seating nipple main body has main channel 21, the sidewall of main channel is used for testing seal section and cooperates, offer inclined to one side hole 10 and the passageway bridge 19 of axial setting in the tube wall of seating nipple main body 4, the bottom in hole 10 is provided with bottom opening 16 partially, and this opening is communicated with the main channel; Partially offer the water injection hole in inlet opening and the radial communication injection well downhole flow regulator external world of radial communication main channel on the sidewall in hole, shown in blanking plug be assemblied in the inclined to one side hole, blanking plug adopts the structure of the embodiment 1 that the utility model provides, certainly also can adopt the structure of embodiment 2.10 inside walls are respectively equipped with seal section 11, middle seal section 13 and lower seal section 15 from top to bottom in the inclined to one side hole of seating nipple main body 4, three groups of sealing rings on the blanking plug respectively with three corresponding being sealed and matched of seal section, inlet opening on the seating nipple main body and water injection hole are enclosed in respectively in each self-corresponding seal cavity, corresponding inlet opening and the water injection hole that is communicated with the seating nipple main body of water inlet on the seal and delivery port makes the filter screen set 20 of inlet opening 14, blanking plug 9, water nozzle 35 consist of a waterflood path with water injection hole 12.
Pressure water injection in the inlet opening 14 of bridge-type eccentric overcurrent injection well downhole flow regulator in use, injected water in the inlet opening 14 enters water nozzle 35 inner chambers by filter screen 20, arrive temporarily stifled piston 33 lower surfaces, when pressure reaches certain limit, shear pin 31 is cut off, this moment, water injection hole 12 was communicated with water nozzle 35 inner chambers, inlet opening 14, and it is outside that the injected water in the inlet opening 14 enters bridge-type eccentric overcurrent injection well downhole flow regulator by water injection hole 23, and down-hole string is realized normal water filling.
In the course of the work, if blanking plug 9 need to be pulled out inclined to one side hole 10, then after pulling out, impurity in the tubing string, dirt etc. can enter inclined to one side hole 10 afterwards, enter the tubing string bottom by bottom opening 16, thereby can in partially hole 10 interior obstructions, not prevent from occuring when blanking plug 9 from dropping into again to throw phenomenon not in place.
Claims (9)
1. the blanking plug of a bridge-type eccentric overcurrent injection well downhole flow regulator, comprise the intake antrum section and the water chamber section that arrange from bottom to top, it is characterized in that: described intake antrum section is communicated with by the plunger shaft section with the water chamber section, sealing is provided with the temporarily stifled piston that can be pushed into the water chamber section in the plunger shaft section, temporarily stifled piston is fixed together by the shear pin of radially setting and the chamber wall of plunger shaft section, and described shear pin can be cut off when injection hydraulic pressure reaches the shear pin yield shear stress.
2. the blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator according to claim 1, it is characterized in that: the water nozzle of blanking plug is installed between intake antrum section and the plunger shaft section, the intake antrum section is communicated with the plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle is less than the gross area of the delivery port of water chamber section.
3. the blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator according to claim 1 and 2, it is characterized in that: described water chamber section and plunger shaft section are located in the seal of blanking plug, the lower end of seal is connected with filter screen set, it is stifled that the lower end of filter screen set is provided with the end, and the stifled external surface in the end is provided with for the sealing ring that is sealed and matched with the inclined to one side hole of injection well downhole flow regulator; Described filter screen set forms the intake antrum section, and the worry hole of filter screen set forms the water inlet of intake antrum section.
4. the blanking plug of bridge-type eccentric overcurrent injection well downhole flow regulator according to claim 1 and 2 is characterized in that: described temporarily stifled piston is sealed and matched by sealing ring and the plunger shaft section internal face that is arranged on its side face.
5. bridge-type eccentric overcurrent injection well downhole flow regulator, comprise that the center has the seating nipple main body of main channel, seating nipple main body tube wall axis is to being provided with inclined to one side hole, partially be equipped with blanking plug in the hole, this blanking plug comprises intake antrum section and the water chamber section that arranges from bottom to top, it is characterized in that: described intake antrum section is communicated with by the plunger shaft section with the water chamber section, sealing is provided with the temporarily stifled piston that can be pushed into the water chamber section in the plunger shaft section, temporarily stifled piston is fixed together by the shear pin of radially setting and the chamber wall of plunger shaft section, and described shear pin can be cut off when injection hydraulic pressure reaches the shear pin yield shear stress.
6. a kind of bridge-type eccentric overcurrent injection well downhole flow regulator according to claim 5, it is characterized in that: the water nozzle of blanking plug is installed between intake antrum section and the plunger shaft section, the intake antrum section is communicated with the plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle is less than the gross area of the delivery port of water chamber section.
7. according to claim 5 or 6 described a kind of bridge-type eccentric overcurrent injection well downhole flow regulators, it is characterized in that: described water chamber section and plunger shaft section are located in the seal of blanking plug, the lower end of seal is connected with filter screen set, it is stifled that the lower end of filter screen set is provided with the end, and the stifled external surface in the end is provided with for the sealing ring that is sealed and matched with the inclined to one side hole of injection well downhole flow regulator; Described filter screen set forms the intake antrum section, and the worry hole of filter screen set forms the water inlet of intake antrum section.
8. it is characterized in that according to claim 5 or 6 described a kind of bridge-type eccentric overcurrent injection well downhole flow regulators: described temporarily stifled piston is sealed and matched by sealing ring and the plunger shaft section internal face that is arranged on its side face.
9. according to claim 5 or 6 described a kind of bridge-type eccentric overcurrent injection well downhole flow regulators, it is characterized in that: lower end, described inclined to one side hole is provided with the bottom opening that is communicated with the main channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367600 CN202707018U (en) | 2012-07-27 | 2012-07-27 | Bridge type eccentric overflowing water distributor and blanking plug thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367600 CN202707018U (en) | 2012-07-27 | 2012-07-27 | Bridge type eccentric overflowing water distributor and blanking plug thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707018U true CN202707018U (en) | 2013-01-30 |
Family
ID=47587327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220367600 Expired - Fee Related CN202707018U (en) | 2012-07-27 | 2012-07-27 | Bridge type eccentric overflowing water distributor and blanking plug thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707018U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541700A (en) * | 2013-10-21 | 2014-01-29 | 康庆刚 | Reverse seal type eccentric water distributor |
| CN108150145A (en) * | 2016-12-06 | 2018-06-12 | 中国石油天然气股份有限公司 | Water distributor |
| CN110513088A (en) * | 2018-05-22 | 2019-11-29 | 中国石油天然气股份有限公司 | Annotate accent ware |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN113833443A (en) * | 2021-10-18 | 2021-12-24 | 中国石油化工股份有限公司 | Eccentric self-testing water distributor |
-
2012
- 2012-07-27 CN CN 201220367600 patent/CN202707018U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541700A (en) * | 2013-10-21 | 2014-01-29 | 康庆刚 | Reverse seal type eccentric water distributor |
| CN103541700B (en) * | 2013-10-21 | 2015-10-28 | 康庆刚 | Reverse sealed eccentric injection mandrel |
| CN108150145A (en) * | 2016-12-06 | 2018-06-12 | 中国石油天然气股份有限公司 | Water distributor |
| CN108150145B (en) * | 2016-12-06 | 2024-08-27 | 中国石油天然气股份有限公司 | Water distributor |
| CN110513088A (en) * | 2018-05-22 | 2019-11-29 | 中国石油天然气股份有限公司 | Annotate accent ware |
| CN110513088B (en) * | 2018-05-22 | 2021-09-28 | 中国石油天然气股份有限公司 | Annotate accent ware |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN113833443A (en) * | 2021-10-18 | 2021-12-24 | 中国石油化工股份有限公司 | Eccentric self-testing water distributor |
| CN113833443B (en) * | 2021-10-18 | 2023-10-27 | 中国石油化工股份有限公司 | Eccentric self-testing water distributor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190727 |