CN108756826A - A kind of reducing self-operated type water pumping gas production plunger - Google Patents
A kind of reducing self-operated type water pumping gas production plunger Download PDFInfo
- Publication number
- CN108756826A CN108756826A CN201810814505.XA CN201810814505A CN108756826A CN 108756826 A CN108756826 A CN 108756826A CN 201810814505 A CN201810814505 A CN 201810814505A CN 108756826 A CN108756826 A CN 108756826A
- Authority
- CN
- China
- Prior art keywords
- plunger
- sliding sleeve
- lower half
- half cylinder
- cartridges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005086 pumping Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 210000000078 claw Anatomy 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 23
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000010924 continuous production Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 241000521257 Hydrops Species 0.000 description 9
- 206010030113 Oedema Diseases 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 208000006011 Stroke Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Abstract
A kind of reducing self-operated type water pumping gas production plunger is equipped with cartridge in plunger body upper end, and A cartridges are fixed by upper end cover, and upper end cover is connected with plunger body, and there are four inlet openings on upper end cover；The cartridge of plunger body lower end is fixed by plunger lower half cylinder, and plunger lower half cylinder is connect with plunger body, and plunger lower half cylinder upper end is set there are four air admission hole；Sliding sleeve is housed, the internal channel of sliding sleeve is circumferentially evenly distributed with four sliding sleeve inlet openings in plunger body inner cavity；Plunger lower half cylinder is circumferentially evenly distributed with four plunger inlet openings and plunger lower half tube inner chamber is equipped with spring, and spring pedestal is connect by screw thread with plunger lower half cylinder；Plunger of the present invention uses the form of dual-seal and pressure sliding sleeve, realize the reducing of plunger sealing structure, take full advantage of the energy of gas well, greatly reduce the wastage of liquid in plunger uphill process, reduce the time of plunger downlink, the change for realizing single period act liquid measure, may be implemented responding curve of well continuous production.
Description
Technical field
The invention belongs to the drainage underground gas production tool in oil and gas exploitation field, more particularly to a kind of reducing is relied on oneself
Formula water pumping gas production plunger.
Background technology
Plunger lift water pumping gas production method is a kind of widely applied intermittent water pumping gas production measure.Plunger lift method can
To reduce shaft bottom hydrops, extend the gas well liquid loading time.Simultaneously plunger lift can be used for easy wax deposition, fouling oil/gas well, save
The process for removing cleaning wax, dirt.But there is also some problems, and it is big that such as production is discontinuous, the closed-in time is long, liquid wastage is lifted in rising
Deng.
Currently used water pumping gas production plunger has solid plunger, brush plunger, liner type plunger and quick plunger, common
Existing deficiency is to be unable to control the act liquid measure of plunger single work period and rise to lift liquid leakage seriously.When hydrops is excessive
When, piston tool can be caused to can not be successfully arrival well head, technique failure；When hydrops is less, strata pressure recovery time is short, column
It is slower to fill in speed uplink, rises and lifts the leakage of liquid process liquids seriously, plunger drain effect is poor.
Invention content
In order to overcome the defect of the above-mentioned prior art, the purpose of the present invention is to provide a kind of drainings of reducing self-operated type to adopt
Air column plug may be implemented the sufficiently sealed of plunger and oil pipe, reduce the wastage of liquid, take full advantage of the energy of gas well；
Each work period lifting liquid measure is controlled by pressure sliding sleeve, plunger is made to be in optimum working efficiency state；Responding curve of well can be achieved
Continuous production.
In order to achieve the above object, the technical scheme is that：
A kind of reducing self-operated type water pumping gas production plunger, includes the plunger body 7 of hollow-core construction, in 7 upper end of plunger body
Equipped with A cartridges 6, A cartridges 6 are fixed by upper end cover 5, and upper end cover 5 is connected by screw thread and plunger body 7, upper end
There are four inlet openings 4 on lid 5；7 lower end of plunger body is equipped with B cartridges 8, and B cartridges 8 are solid by plunger lower half cylinder 12
Fixed, plunger lower half cylinder 12 is connect by screw thread with plunger body 7,12 upper end of plunger lower half cylinder set there are four air admission hole 9；Plunger sheet
Sliding sleeve 2 is housed, fishing head 1 is connect by screw thread with sliding sleeve 2, and 2 top of sliding sleeve is hollow-core construction, and the interior of sliding sleeve 2 leads in 7 inner cavity of body
Road 3 is circumferential to be evenly distributed with four sliding sleeve inlet openings 11, and 2 bottom of sliding sleeve is equipped with claw 13；
The plunger lower half cylinder 12 is circumferentially evenly distributed with four plunger inlet openings 10 and 12 inner cavity of plunger lower half cylinder is equipped with spring 14,
14 one end of spring resists 2 lower face of sliding sleeve, and the other end resists 16 upper end of spring pedestal and is compressed in 12 inner cavity of plunger lower half cylinder；Spring
Pedestal 16 is connect by screw thread with plunger lower half cylinder 12, and 12 inner wall of plunger lower half cylinder is equipped with claw locating slot 15.
For plunger of the present invention in up stroke, top hydrops and lower gas enter sealing through inlet opening 4 and air admission hole 9 respectively
The inner cavity of packing element 6 and cartridge 8, so that cartridge expansion reaches fully close under the action of hydrops pressure and gas pressure
The effect of envelope, during downlink, with the increase of upper liquid, sliding sleeve 2 under the action of liquid compressed spring 14 until sliding sleeve 2
Bottom, claw 13 is locking in claw locating slot 15, goes upward to well head, sliding sleeve 2 is made to be restored to downlink under the action of catcher
State, complete a cycle.When hydrops cannot excessively make plunger reach well head, list can be changed by replacing spring 14
Secondary act liquid measure, so that plunger can smoothly reach well head.
The present invention has the following advantages：
1, plunger of the present invention uses the form of dual-seal and pressure sliding sleeve, and each work period act is controlled by sliding sleeve 2
Liquid measure is risen, the reducing of plunger sealing structure is realized, takes full advantage of the energy of gas well, greatly reduce plunger uphill process
The wastage of middle liquid reduces the time of plunger downlink, realizes the change of single period act liquid measure, responding curve of well may be implemented
Continuous production makes plunger be in optimum working efficiency state.
2, there is a problem of that wastage is bigger for current plunger, filling for plunger and oil pipe may be implemented in plunger of the present invention
Divide sealing, reduces the wastage of liquid, take full advantage of the energy of gas well.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 be the present invention plunger downlink and feed liquor during sliding sleeve internal channel opening state schematic diagram.
Specific implementation mode
The invention will now be described in detail with reference to the accompanying drawings.
Referring to Fig.1, a kind of reducing self-operated type water pumping gas production plunger, includes the plunger body 7 of hollow-core construction, in plunger sheet
7 upper end of body is equipped with A cartridges 6, and A cartridges 6 are fixed by upper end cover 5, and upper end cover 5 is connected by screw thread and plunger body 7
It connects, there are four inlet openings 4 on upper end cover 5；7 lower end of plunger body is equipped with B cartridges 8, and B cartridges 8 pass through plunger lower half
Cylinder 12 is fixed, and plunger lower half cylinder 12 connect by screw thread with plunger body 7,12 upper end of plunger lower half cylinder set there are four air admission hole 9；
Sliding sleeve 2 is housed, fishing head 1 is connect by screw thread with sliding sleeve 2, and 2 top of sliding sleeve is hollow-core construction, sliding sleeve 2 in 7 inner cavity of plunger body
Internal channel 3 it is circumferential be evenly distributed with four sliding sleeve inlet openings 11,2 bottom of sliding sleeve is equipped with claw 13；
The plunger lower half cylinder 12 is circumferentially evenly distributed with four plunger inlet openings 10 and 12 inner cavity of plunger lower half cylinder is equipped with spring 14,
14 one end of spring resists 2 lower face of sliding sleeve, and the other end resists 16 upper end of spring pedestal and is compressed in 12 inner cavity of plunger lower half cylinder；Spring
Pedestal 16 is connect by screw thread with plunger lower half cylinder 12, and 12 inner wall of plunger lower half cylinder is equipped with claw locating slot 15.
The operation principle of the present invention is that：
The present invention is in the down stroke stage as shown in Fig. 2, being located at four equally distributed 11 Hes of sliding sleeve inlet opening on sliding sleeve 2
Four plunger inlet openings 10 being evenly distributed on plunger are to just, hydrops enters sliding sleeve internal channel 3 through inlet opening and flows on plunger
Portion, A cartridges 6 and B cartridges 8 are in normal condition, realize fast downlink of the plunger in hydrops.
After plunger reaches shaft bottom, sliding sleeve inlet opening 11 and plunger inlet opening 10 are still in connected state, as liquid passes through
Sliding sleeve internal channel 3 flows into plunger upper part, and plunger upper part hydrops gradually increases, and liquid load gradually increases, and fluid column load is directly made
For sliding sleeve inner bottom surface, the spring 14 of support plunger sliding sleeve is gradually compressed, and sliding sleeve 2 is with respect to 12 downlink of plunger lower half cylinder.Work as product
When liquid measure reaches the critical liquid carry over of Plunger Lift, sliding sleeve 2 comes downwards to the close stance of sliding sleeve inlet opening 11 and plunger inlet opening 10
It sets, the plunger for forming sealing is whole.Sliding sleeve lower end claw 13 is caught in claw locating slot 15, realizes the seat card of sliding sleeve, keeps logical
The closing in road.
The uplink stage of the present invention is as shown in Figure 1, plunger lower gas enters the inner cavity of B cartridges 8, B by air admission hole 9
Cartridge 8 expands under the action of inside and outside differential pressure is fitted in tube inner wall, realizes the sealing of lower part；Meanwhile plunger upper part
Liquid enter the inner cavities of A cartridges 6 by inlet opening 5, A cartridges 6 expand under the action of fluid pressure to be fitted in
Tube inner wall realizes the sealing on top.Liquid is discharged after plunger reaches import, and the cartridge on top is restored, B fluid sealants
Cylinder 8 restores due to gas output, slides over and is restored to sliding sleeve inlet opening 11 under the action of catcher and plunger inlet opening 10 is right
Positive state completes a cycle.
Claims (1)
1. a kind of reducing self-operated type water pumping gas production plunger, which is characterized in that the plunger body (7) including hollow-core construction, in column
It fills in ontology (7) upper end and A cartridges (6) is housed, A cartridges (6) are fixed by upper end cover (5), and upper end cover (5) passes through screw thread
It is connected with plunger body (7), there are four inlet openings (4) on upper end cover (5)；
Plunger body (7) lower end is equipped with B cartridges (8), and B cartridges (8) are fixed by plunger lower half cylinder (12), under plunger
Half (12) are connect by screw thread with plunger body (7), and plunger lower half cylinder (12) upper end is set there are four air admission hole (9)；Plunger sheet
Sliding sleeve (2) is housed in body (7) inner cavity, fishing head (1) is connect by screw thread with sliding sleeve (2), and sliding sleeve (2) top is hollow-core construction,
The internal channel (3) of sliding sleeve (2) is circumferentially evenly distributed with four sliding sleeve inlet openings (11), and 2 bottom of sliding sleeve is equipped with claw (13)；
The plunger lower half cylinder (12) is circumferentially evenly distributed with four plunger inlet openings (10) and plunger lower half cylinder (12) inner cavity is equipped with spring
(14), spring (14) one end resists sliding sleeve (2) lower face, and the other end resists spring pedestal (16) upper end and is compressed in plunger lower half cylinder
(12) inner cavity；Spring pedestal (16) is connect by screw thread with plunger lower half cylinder (12), and plunger lower half cylinder (12) inner wall is equipped with claw
Locating slot (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810814505.XA CN108756826A (en) | 2018-07-23 | 2018-07-23 | A kind of reducing self-operated type water pumping gas production plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810814505.XA CN108756826A (en) | 2018-07-23 | 2018-07-23 | A kind of reducing self-operated type water pumping gas production plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108756826A true CN108756826A (en) | 2018-11-06 |
Family
ID=63971232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810814505.XA Pending CN108756826A (en) | 2018-07-23 | 2018-07-23 | A kind of reducing self-operated type water pumping gas production plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108756826A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593820A (en) * | 2019-08-07 | 2019-12-20 | 中国石油天然气股份有限公司 | Liquid drainage and gas production device and gas well liquid drainage method |
| CN110847843A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Rubber cup rubber cylinder sealing structure plunger |
| CN112065334A (en) * | 2020-07-30 | 2020-12-11 | 成都万基石油机械制造有限公司 | Underground intelligent gas interception and adjustment gas production and drainage robot |
| CN112253447A (en) * | 2020-10-21 | 2021-01-22 | 西南石油大学 | Be suitable for new plunger of local undergauge plunger drainage gas production of tubular column in pit |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163904Y (en) * | 1993-01-09 | 1994-05-04 | 王克峰 | Self-sealing device |
| CN2165290Y (en) * | 1993-03-27 | 1994-05-18 | 刘成华 | Reduced reciprocating sealing device |
| US20040226713A1 (en) * | 2003-05-13 | 2004-11-18 | Townsend Murray Ray | Plunger for gas wells |
| US20080185141A1 (en) * | 2007-02-06 | 2008-08-07 | Stellarton Technologies Inc. | Plunger lift system |
| CN201943649U (en) * | 2011-03-09 | 2011-08-24 | 毛元红 | High pressure fracture long glue cylinder packer |
| CN102889388A (en) * | 2012-10-19 | 2013-01-23 | 东北石油大学 | Self-adapted sealing device of piston of hydraulic cylinder |
| CN103133340A (en) * | 2011-11-25 | 2013-06-05 | 中国石油天然气股份有限公司 | Automatic liquid-discharging plunger for gas well |
| CN204371649U (en) * | 2014-12-02 | 2015-06-03 | 中国石油天然气股份有限公司 | Liner type water drainage and gas production plunger |
| CN104863548A (en) * | 2015-05-26 | 2015-08-26 | 王玉 | Automatic intermittent coalbed methane water draining and gas producing device |
| CN206769867U (en) * | 2017-03-23 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of fill-type external packer of pipe |
| CN107542433A (en) * | 2017-08-24 | 2018-01-05 | 西安石油大学 | A kind of pressure sliding sleeve controls formula gas well continuous drainage gas production plunger |
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN207112202U (en) * | 2017-08-04 | 2018-03-16 | 高玉琴 | Self sealss sleeve expansion joint |
| CN208546159U (en) * | 2018-07-23 | 2019-02-26 | 西安石油大学 | Reducing self-operated type water pumping gas production plunger |
-
2018
- 2018-07-23 CN CN201810814505.XA patent/CN108756826A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163904Y (en) * | 1993-01-09 | 1994-05-04 | 王克峰 | Self-sealing device |
| CN2165290Y (en) * | 1993-03-27 | 1994-05-18 | 刘成华 | Reduced reciprocating sealing device |
| US20040226713A1 (en) * | 2003-05-13 | 2004-11-18 | Townsend Murray Ray | Plunger for gas wells |
| US20080185141A1 (en) * | 2007-02-06 | 2008-08-07 | Stellarton Technologies Inc. | Plunger lift system |
| CN201943649U (en) * | 2011-03-09 | 2011-08-24 | 毛元红 | High pressure fracture long glue cylinder packer |
| CN103133340A (en) * | 2011-11-25 | 2013-06-05 | 中国石油天然气股份有限公司 | Automatic liquid-discharging plunger for gas well |
| CN102889388A (en) * | 2012-10-19 | 2013-01-23 | 东北石油大学 | Self-adapted sealing device of piston of hydraulic cylinder |
| CN204371649U (en) * | 2014-12-02 | 2015-06-03 | 中国石油天然气股份有限公司 | Liner type water drainage and gas production plunger |
| CN104863548A (en) * | 2015-05-26 | 2015-08-26 | 王玉 | Automatic intermittent coalbed methane water draining and gas producing device |
| CN206769867U (en) * | 2017-03-23 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of fill-type external packer of pipe |
| CN207112202U (en) * | 2017-08-04 | 2018-03-16 | 高玉琴 | Self sealss sleeve expansion joint |
| CN107542433A (en) * | 2017-08-24 | 2018-01-05 | 西安石油大学 | A kind of pressure sliding sleeve controls formula gas well continuous drainage gas production plunger |
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN208546159U (en) * | 2018-07-23 | 2019-02-26 | 西安石油大学 | Reducing self-operated type water pumping gas production plunger |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593820A (en) * | 2019-08-07 | 2019-12-20 | 中国石油天然气股份有限公司 | Liquid drainage and gas production device and gas well liquid drainage method |
| CN110847843A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Rubber cup rubber cylinder sealing structure plunger |
| CN110847843B (en) * | 2019-11-07 | 2021-11-30 | 中国石油天然气股份有限公司 | Rubber cup rubber cylinder sealing structure plunger |
| CN112065334A (en) * | 2020-07-30 | 2020-12-11 | 成都万基石油机械制造有限公司 | Underground intelligent gas interception and adjustment gas production and drainage robot |
| CN112253447A (en) * | 2020-10-21 | 2021-01-22 | 西南石油大学 | Be suitable for new plunger of local undergauge plunger drainage gas production of tubular column in pit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108756826A (en) | A kind of reducing self-operated type water pumping gas production plunger | |
| CN108756825A (en) | A kind of swab formula water pumping gas production plunger | |
| CN107916913A (en) | A kind of self-adaptive pressure sliding sleeve controls formula gas well intelligence continuous drainage gas production plunger | |
| CN104695892B (en) | A kind of independent hydraulically-controlled type compression packer | |
| CN100376807C (en) | Piston type energy accumulator | |
| CN107542433A (en) | A kind of pressure sliding sleeve controls formula gas well continuous drainage gas production plunger | |
| CN208546159U (en) | Reducing self-operated type water pumping gas production plunger | |
| CN202381286U (en) | Automatic gas well drainage gas production plunger | |
| CN208546158U (en) | Swab formula water pumping gas production plunger | |
| CN201439701U (en) | Stage cementing distributor | |
| CN208106383U (en) | Producing well energy-saving air release valve | |
| CN213269841U (en) | Double-valve type float collar | |
| CN2916217Y (en) | Piston accumulator | |
| CN104653541B (en) | A kind of mine water medium hydraulic cylinder and continuous extracting device of oil | |
| CN205035073U (en) | A topping up device for transformer temperature controller | |
| CN205744406U (en) | Oil-well pump of oil well increases row and helps picking device | |
| CN204941904U (en) | A kind of sand-proof oil-well pump and plunger thereof | |
| CN210483637U (en) | Constant quantity steam distribution valve | |
| CN203640970U (en) | Underground hydraulic piston pump | |
| CN202579154U (en) | Polymer injection pump head with adjustable flow rate | |
| CN205895174U (en) | Water conservancy weight on bit regulator | |
| CN217712507U (en) | Automatic sleeve gas collecting device | |
| CN206681957U (en) | Three plunger mining pumps | |
| CN203023168U (en) | Double-action multi-level oil cylinder | |
| CN206668213U (en) | A kind of underground vent valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220622 Address after: 710000 room 2201, building 2, Fengcheng 3, Fengcheng 3 Road, Weiyang District, Xi'an City, Shaanxi Province Applicant after: Shaanxi Shengrun Energy Environmental Protection Technology Co.,Ltd. Address before: 710065, No. 18, two East, electronic road, Shaanxi, Xi'an Applicant before: XI'AN SHIYOU University |
|
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |