CN107605429A - A kind of pipe pressure for oil exploitation eliminates sampling valve device - Google Patents

A kind of pipe pressure for oil exploitation eliminates sampling valve device Download PDF

Info

Publication number
CN107605429A
CN107605429A CN201710804979.1A CN201710804979A CN107605429A CN 107605429 A CN107605429 A CN 107605429A CN 201710804979 A CN201710804979 A CN 201710804979A CN 107605429 A CN107605429 A CN 107605429A
Authority
CN
China
Prior art keywords
flow
rate adjustment
oil
sampling
valve body
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.)
Granted
Application number
CN201710804979.1A
Other languages
Chinese (zh)
Other versions
CN107605429B (en
Inventor
赵越
孙丽
魏婷婷
周辉
杨云飞
李瑛�
郑海军
张雷
张圆圆
王红伟
黄振东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Han Qi
Huang Zhendong
Jing Lin
Sun Li
Wei Tingting
Yang Yunfei
Zhang Lei
Zhang Yuanyuan
Zhao Yue
Zhou Hui
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201710804979.1A priority Critical patent/CN107605429B/en
Publication of CN107605429A publication Critical patent/CN107605429A/en
Application granted granted Critical
Publication of CN107605429B publication Critical patent/CN107605429B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a kind of pipe pressure for oil exploitation to eliminate sampling valve device, including Flow-rate adjustment valve body, sample valve body and oil extraction valve body, the Flow-rate adjustment valve inner is provided with Flow-rate adjustment valve seat, oil inlet passage is set in the flow control valve body of Flow-rate adjustment valve seat one end, oil discharge passage is set in the flow control valve body of the Flow-rate adjustment valve seat other end, stream cover is installed in the flow control valve body of the Flow-rate adjustment valve seat upper end, the stream cover is internal to be provided with Flow-rate adjustment valve element, Flow-rate adjustment valve element top connection traffic regulating valve stem, Flow-rate adjustment valve rod passes through Flow-rate adjustment bonnet connection traffic adjusting handle;Realize that oil stops conveying, flow feed adjustment is convenient, realizes that oil continues to convey, and improves the accuracy of oil sampling, avoid because pressure in oil feed line and caused by sample difficulty the problem of.

Description

A kind of pipe pressure for oil exploitation eliminates sampling valve device
Technical field
The present invention relates to oil exploration equipment technical field, specifically a kind of pipe pressure for oil exploitation eliminates sampling valve Device.
Background technology
With the continuous development of economy, the consumption of the energy also constantly increasing, with being gradual increasing by recovery time It is long, it is required for being sampled detection to the oil constantly exploited in oil exploitation initial stage and recovery process, is so advantageous to fill Divide and understand stratum physical characteristic existing for oil, be provided with force data for the further exploitation of oil, it is ensured that the matter of oil exploitation Amount, is provided with flow control valve on petroleum conveying pipeline at present, but its function is single, only has the function of opening and closing, can not Effectively help is provided for oil sampling, the mode dug on tube wall has inadvisable.Therefore it is, it is necessary to a kind of for oil exploitation Pipe pressure eliminates sampling valve device and meets the needs of oil sampling, avoids because the problems such as pipe is pressed increases sampling difficulty.
The content of the invention
It is an object of the invention to provide a kind of pipe pressure for oil exploitation to eliminate sampling valve device, to solve the above-mentioned back of the body The problem of being proposed in scape technology.
To achieve the above object, the present invention provides following technical scheme:
A kind of pipe pressure for oil exploitation eliminates sampling valve device, including Flow-rate adjustment valve body, sampling valve body and oil extraction valve body, The Flow-rate adjustment valve inner is provided with Flow-rate adjustment valve seat, and oil-feed is set in the flow control valve body of Flow-rate adjustment valve seat one end Passage, oil discharge passage, the stream of the Flow-rate adjustment valve seat upper end are set in the flow control valve body of the Flow-rate adjustment valve seat other end Stream cover is installed, the stream cover is internal to be provided with Flow-rate adjustment valve element, the connection of Flow-rate adjustment valve element top in adjustable valve body Flow-rate adjustment valve rod, Flow-rate adjustment valve rod pass through Flow-rate adjustment bonnet connection traffic adjusting handle;The Flow-rate adjustment valve body bottom Portion is provided with sampling valve seat, samples and sampling valve element is provided with the oil discharge passage above valve seat, and sampling valve element is connected by sampling valve rod Sample handwheel is accessed, sampling handwheel is arranged on outside sampling valve body;The sampling valve body side surface is welded with oil extraction valve body, the oil extraction Oil extraction reducer pipe is provided with the middle part of valve body, oil extraction valve element is installed in oil extraction reducer pipe, oil extraction valve element connects oil extraction hand by valve rod Wheel.
As the further scheme of the present invention:Described flow in cover side wall offers some uniform flow holes, uniform flow hole and oil-feed Passage connects.
As the further scheme of the present invention:Internal thread is arranged with Flow-rate adjustment valve rod in the Flow-rate adjustment bonnet Post, Flow-rate adjustment valve rod is threadedly coupled with internal threaded column and internal threaded column is embedded in Flow-rate adjustment bonnet.
As the further scheme of the present invention:The Flow-rate adjustment bonnet is arranged at the top of Flow-rate adjustment valve body.
As the further scheme of the present invention:Screw thread position-limiting drum is welded with the sampling valve body, screw thread position-limiting drum is arranged It is threadedly coupled on sampling valve rod and with sampling valve rod.
As the further scheme of the present invention:The sampling valve inner is set to sample chamber, and sampling chamber passes through sampling Through hole inside oil discharge passage with connecting on valve seat.
As the further scheme of the present invention:The oil extraction valve inner of the oil extraction valve element side and sampling chamber, The oil extraction valve body bottom side connection oil exit pipe of oil extraction valve element opposite side.
Compared with prior art, the beneficial effects of the invention are as follows:
1st, when Flow-rate adjustment valve element is moved to above uniform flow hole, uniform flow hole connects oil inlet passage with oil discharge passage, facilitates stone The flowing of oil;When Flow-rate adjustment valve element is moved to below uniform flow hole, Flow-rate adjustment valve element divides oil inlet passage and oil discharge passage From realizing that oil stops conveying, flow feed adjustment is convenient.
2nd, first rotation flow adjusting handle makes Flow-rate adjustment valve element move to below uniform flow hole, suspends oil in oil inlet passage Conveyed into oil discharge passage, so as to reduce oil pressure into oil discharge passage, avoid sampling valve body damage, then rotate sampling hand Wheel makes sampling valve body move upwards, and oil flows into sampling chamber along sampling valve seat in oil discharge passage, then reversely rotates sampling hand Wheel makes sampling valve body return in sampling valve seat, completes sampling, it is even that rotation flow adjusting handle moves to Flow-rate adjustment valve element Above discharge orifice, realize that oil continues to convey.
3rd, rotate sampling handwheel and oil extraction valve element is driven out by oil extraction reducer pipe by valve rod and moved in draining valve body In the cavity in portion, then oil is discharged into sampling test tube in through oil extraction reducer pipe and from oil exit pipe in sampling cavity room, improves stone Oil sampling accuracy, avoid because pressure in oil feed line and caused by sample difficulty the problem of.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation that valve body is sampled in the present invention.
In figure:1- flows cover, 2- Flow-rate adjustments valve element, 3- oil discharge passages, 4- Flow-rate adjustments valve body, 5- samplings valve element, 6- Oil extraction valve element, 7- sampling chamber, 8- sampling handwheel, 9- sampling valve body, 10- oil extractions valve body, 11- oil exit pipes, 12- oil extractions handwheel, 13- samplings valve seat, 14- oil inlet passages, 15- Flow-rate adjustments valve seat, 16- uniform flows hole, 17- Flow-rate adjustments valve rod, 18- Flow-rate adjustments Bonnet, 19- Flow-rate adjustments handwheel, 20- internal threaded columns, 21- oil extractions reducer pipe, 22- screw thread position-limiting drums.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1~2, in the embodiment of the present invention, a kind of pipe pressure for oil exploitation eliminates sampling valve device, including Flow-rate adjustment valve body 4, sampling valve body 9 and oil extraction valve body 10, the inside of Flow-rate adjustment valve body 4 are provided with Flow-rate adjustment valve seat 15, Oil inlet passage 14, the flow of the other end of Flow-rate adjustment valve seat 15 are set in the Flow-rate adjustment valve body 4 of the one end of Flow-rate adjustment valve seat 15 Oil discharge passage 3 is set in regulation valve body 4, stream cover is installed in the Flow-rate adjustment valve body 4 of the upper end of Flow-rate adjustment valve seat 15 1, some uniform flow holes 16 are offered in 1 side wall of stream cover, uniform flow hole 16 connects with oil inlet passage 14, is set inside the stream cover 1 There are Flow-rate adjustment valve element 2, the top connection traffic regulating valve stem 17 of Flow-rate adjustment valve element 2, Flow-rate adjustment valve rod 17 is adjusted through flow The connection traffic adjusting handle 19 of bonnet 18 is saved, internal thread is arranged with the Flow-rate adjustment valve rod 17 in the Flow-rate adjustment bonnet 18 Post 20, Flow-rate adjustment valve rod 17 is threadedly coupled with internal threaded column 20 and internal threaded column 20 is embedded in Flow-rate adjustment bonnet 18;Institute Flow-rate adjustment bonnet 18 is stated installed in the top of Flow-rate adjustment valve body 4, in use, rotation flow adjusting handle 19, flow control valve Bar 17 moves up and down relative to Flow-rate adjustment bonnet 18, so as to drive Flow-rate adjustment valve element 2 being moved in stream cover 1, works as flow When adjusting spool 2 moves to 16 top of uniform flow hole, uniform flow hole 16 connects oil inlet passage 14 with oil discharge passage 3, facilitates oil Flowing;When Flow-rate adjustment valve element 2 moves to 16 lower section of uniform flow hole, Flow-rate adjustment valve element 2 is by oil inlet passage 14 and oil discharge passage 3 Separation, realize that oil stops conveying.
The bottom of Flow-rate adjustment valve body 4 is provided with sampling valve seat 13, is provided with the oil discharge passage 3 of the top of sampling valve seat 13 Valve element 5 is sampled, sampling valve element 5 is arranged on outside sampling valve body 9 by sampling valve rod connection sampling handwheel 8, sampling handwheel 8, institute State and screw thread position-limiting drum 22 is welded with sampling valve body 9, screw thread position-limiting drum 22 is set on sampling valve rod and with sampling threaded stem Connection, described sample are set to sample chamber 7 inside valve body 9, and sampling chamber 7 is by sampling through hole and oil discharge passage 3 on valve seat 13 Inside connection;When not sampling, sampling valve element 5 is arranged in sampling valve seat 13 and blocks sampling valve seat 13.
When needing sampling, rotation flow adjusting handle 19 makes Flow-rate adjustment valve element 2 move to the lower section of uniform flow hole 16 first, Oil conveys into oil discharge passage 3 in pause oil inlet passage 14, so as to reduce oil pressure into oil discharge passage 3, avoids sampling Valve body 9 damages, and then rotating sampling handwheel 8 makes sampling valve body 9 move upwards, and oil flows along sampling valve seat 13 in oil discharge passage 3 Enter to sample chamber 7, then reversely rotating sampling handwheel 8 makes sampling valve body 9 move back in sampling valve seat 13, completes sampling, rotates Flow-rate adjustment handwheel 19 makes Flow-rate adjustment valve element 2 move to the top of uniform flow hole 16, realizes that oil continues to convey.
Sampling valve body 9 side is welded with oil extraction valve body 10, and the middle part of oil extraction valve body 10 is provided with oil extraction reducer pipe 21, Oil extraction valve element 6 is installed, oil extraction valve element 6 connects oil extraction handwheel 12, the oil extraction valve element 6 one by valve rod in oil extraction reducer pipe 21 The inside of oil extraction valve body 10 of side connects with sampling chamber 7, the bottom side of the oil extraction valve body 10 connection oil exit pipe of the opposite side of oil extraction valve element 6 11, rotate sampling handwheel 8 and oil extraction valve element 6 is driven out by oil extraction reducer pipe 21 by valve rod and moved to inside oil extraction valve body 10 Cavity in, then sample oil in chamber 7 and, through oil extraction reducer pipe 21 and being discharged into from oil exit pipe 11 in sampling test tube, improve Oil sampling accuracy, avoid because pressure in oil feed line and caused by sample difficulty the problem of.
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour can makes one to some of which technical characteristic A little simple modification, equivalent change and modifications, are belonged in the range of technical solution of the present invention.
, it is necessary to illustrate in the description of this specification, unless otherwise clearly defined and limited, term " setting ", " connected " and " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected Connect;Can be joined directly together, can also be indirectly connected by intermediary, can be the connection of two element internals.For this For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

Claims (7)

1. a kind of pipe pressure for oil exploitation eliminates sampling valve device, including Flow-rate adjustment valve body (4), sampling valve body (9) and Oil extraction valve body (10), it is characterised in that be provided with Flow-rate adjustment valve seat (15), Flow-rate adjustment inside the Flow-rate adjustment valve body (4) Oil inlet passage (14), the flow of Flow-rate adjustment valve seat (15) other end are set in the Flow-rate adjustment valve body (4) of valve seat (15) one end Oil discharge passage (3) is set in regulation valve body (4), is installed in the Flow-rate adjustment valve body (4) of Flow-rate adjustment valve seat (15) upper end There is stream cover (1), it is described to be provided with Flow-rate adjustment valve element (2), Flow-rate adjustment valve element (2) top connection traffic inside stream cover (1) Regulating valve stem (17), Flow-rate adjustment valve rod (17) pass through Flow-rate adjustment bonnet (18) connection traffic adjusting handle (19);The stream Adjustable valve body (4) bottom is provided with sampling valve seat (13), samples in the oil discharge passage (3) above valve seat (13) and is provided with sampling valve Core (5), sampling valve element (5) are arranged on sampling valve body (9) outside by sampling valve rod connection sampling handwheel (8), sampling handwheel (8) Portion;Described sampling valve body (9) side is welded with oil extraction valve body (10), and oil extraction reducer pipe is provided with the middle part of the oil extraction valve body (10) (21) oil extraction valve element (6), is installed, oil extraction valve element (6) connects oil extraction handwheel (12) by valve rod in oil extraction reducer pipe (21).
2. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described Some uniform flow holes (16) are offered in stream cover (1) side wall, uniform flow hole (16) connect with oil inlet passage (14).
3. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described Be arranged with internal threaded column (20) on Flow-rate adjustment valve rod (17) in Flow-rate adjustment bonnet (18), Flow-rate adjustment valve rod (17) with it is interior Threaded post (20) is threadedly coupled and internal threaded column (20) is embedded in Flow-rate adjustment bonnet (18).
4. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described Flow-rate adjustment bonnet (18) is arranged at the top of Flow-rate adjustment valve body (4).
5. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described Screw thread position-limiting drum (22) is welded with sampling valve body (9), screw thread position-limiting drum (22) is set on sampling valve rod and with sampling valve rod Threaded connection.
6. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described It is set to sample chamber (7) inside sampling valve body (9), sampling chamber (7) is by sampling through hole and oil discharge passage (3) on valve seat (13) Inside connection.
7. a kind of pipe pressure for oil exploitation according to claim 1 eliminates sampling valve device, it is characterised in that described The oil extraction valve body (10) of oil extraction valve element (6) side is internal to be connected with sampling chamber (7), the draining valve of oil extraction valve element (6) opposite side Body (10) bottom side connection oil exit pipe (11).
CN201710804979.1A 2017-09-08 2017-09-08 Pipe pressure eliminating and sampling valve device for oil exploitation Expired - Fee Related CN107605429B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710804979.1A CN107605429B (en) 2017-09-08 2017-09-08 Pipe pressure eliminating and sampling valve device for oil exploitation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710804979.1A CN107605429B (en) 2017-09-08 2017-09-08 Pipe pressure eliminating and sampling valve device for oil exploitation

Publications (2)

Publication Number Publication Date
CN107605429A true CN107605429A (en) 2018-01-19
CN107605429B CN107605429B (en) 2022-05-20

Family

ID=61062306

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710804979.1A Expired - Fee Related CN107605429B (en) 2017-09-08 2017-09-08 Pipe pressure eliminating and sampling valve device for oil exploitation

Country Status (1)

Country Link
CN (1) CN107605429B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112268751A (en) * 2020-10-21 2021-01-26 朱红璋 Oil extraction sample oil reservoir sampling equipment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2503285Y (en) * 2001-09-06 2002-07-31 赵斌健 Pressure reducing constant-current valve
RU2253012C1 (en) * 2003-11-11 2005-05-27 Хузин Ринат Раисович Sample-taking device
CN201025027Y (en) * 2007-04-26 2008-02-20 罗永康 Well mouth pressure measurement and oil sampling valve
CN202510108U (en) * 2012-03-28 2012-10-31 何国伟 Oil well production back-pressure simulator
CN204002736U (en) * 2014-08-30 2014-12-10 克拉玛依胜利高原机械有限公司 The adjustable resistance oil nozzle sleeve of a kind of pin type
CN204457601U (en) * 2014-12-19 2015-07-08 中国石油天然气股份有限公司 A kind of sample valve
CN105649574A (en) * 2014-11-12 2016-06-08 中国石油天然气股份有限公司 Adjustable oil nozzle
RU2589547C1 (en) * 2015-01-12 2016-07-10 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Valve for sampling from pipeline

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2503285Y (en) * 2001-09-06 2002-07-31 赵斌健 Pressure reducing constant-current valve
RU2253012C1 (en) * 2003-11-11 2005-05-27 Хузин Ринат Раисович Sample-taking device
CN201025027Y (en) * 2007-04-26 2008-02-20 罗永康 Well mouth pressure measurement and oil sampling valve
CN202510108U (en) * 2012-03-28 2012-10-31 何国伟 Oil well production back-pressure simulator
CN204002736U (en) * 2014-08-30 2014-12-10 克拉玛依胜利高原机械有限公司 The adjustable resistance oil nozzle sleeve of a kind of pin type
CN105649574A (en) * 2014-11-12 2016-06-08 中国石油天然气股份有限公司 Adjustable oil nozzle
CN204457601U (en) * 2014-12-19 2015-07-08 中国石油天然气股份有限公司 A kind of sample valve
RU2589547C1 (en) * 2015-01-12 2016-07-10 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Valve for sampling from pipeline

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112268751A (en) * 2020-10-21 2021-01-26 朱红璋 Oil extraction sample oil reservoir sampling equipment
CN112268751B (en) * 2020-10-21 2024-01-19 朱红璋 Petroleum exploitation sample oil layer sampling equipment

Also Published As

Publication number Publication date
CN107605429B (en) 2022-05-20

Similar Documents

Publication Publication Date Title
CN104047583B (en) Underground magnetic control electric water distribution device and its control method
CN104948148B (en) A kind of stepless volume control device
CN202383121U (en) Device for simulating liquid carried by gas
WO2010115834A3 (en) Apparatus for and method of drilling a subterranean borehole
CN105735981B (en) Fractured reservoir complex working condition analogue experiment installation
CN104948149B (en) A kind of multimedium dispensing system suitable in mining site complexity oil reservoir
NO20111044A1 (en) Advanced valve for fluids with active flow control for underground use
CN107605429A (en) A kind of pipe pressure for oil exploitation eliminates sampling valve device
CN204476357U (en) Anti-erosion device for fracturing wellhead
CN102900409A (en) Throwing-fishing-free separated layer water injection technology tubular column
CN204492810U (en) A kind of gas liquid two-phase flow changeable quality experimental device
RU2576729C1 (en) Apparatus for simultaneous separate operation of several deposits at same well (versions)
CN203978413U (en) The meticulous pressure control device of plural parallel stage throttling
CN202402656U (en) Adjustable flow control valve for controlling water blending and preventing blockage of oil pipeline
CN205823253U (en) Permanent setting type down-hole direct-reading flood pattern
CN107882553A (en) Note the online closed sampling device of polymers
CN104929618B (en) One kind takes sand fracturing fluid transported simulation research device in perforation tunnel
CN105089665A (en) Extraction type polymer solution sampler
CN207245707U (en) A kind of well mouth of oil well sampler and decompressor
CN207647508U (en) Note the online closed sampling device of polymers
CN203097864U (en) Complex structural well shaft oil-gas-water three-phase fluid mass-variable flow simulating device
CN206421746U (en) The many pressure system gas-bearing formation spill and leakages of one kind simulation brill chance are same to deposit experimental provision
CN102383750B (en) Continuous positive and negative integrated sand washing device for oil well
CN106246136B (en) A kind of adjustable throttling positive choke
CN204804838U (en) Extraction formula polymer solution sampler

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: 20220422

Address after: 257000 Room 501, unit 3, building 40, No. 211, Donger Road, Dongying District, Dongying City, Shandong Province

Applicant after: Zhao Yue

Applicant after: Huang Zhendong

Applicant after: Wei Tingting

Applicant after: Sun Li

Applicant after: Yang Yunfei

Applicant after: Han Qi

Applicant after: Jing Lin

Applicant after: Zhang Lei

Applicant after: Zhang Yuanyuan

Applicant after: Zhou Hui

Address before: 257200 dongshenghekou oil production management area of Sinopec Shengli Oilfield, Hekou District, Dongying City, Shandong Province

Applicant before: Zhao Yue

Applicant before: Wang Hongwei

Applicant before: Huang Zhendong

Applicant before: Sun Li

Applicant before: Wei Tingting

Applicant before: Zhou Hui

Applicant before: Yang Yunfei

Applicant before: Li Ying

Applicant before: Zheng Haijun

Applicant before: Zhang Lei

Applicant before: Zhang Yuanyuan

GR01 Patent grant
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: 20220520