CN102022134B - Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method - Google Patents
Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method Download PDFInfo
- Publication number
- CN102022134B CN102022134B CN201010545678XA CN201010545678A CN102022134B CN 102022134 B CN102022134 B CN 102022134B CN 201010545678X A CN201010545678X A CN 201010545678XA CN 201010545678 A CN201010545678 A CN 201010545678A CN 102022134 B CN102022134 B CN 102022134B
- Authority
- CN
- China
- Prior art keywords
- hole
- vibration
- pressure
- coal bed
- coal seam
- 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.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000003825 pressing Methods 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 title abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000007796 conventional method Methods 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 12
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000002459 sustained effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- 230000035699 permeability Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method, which comprises: drilling holes at the positions of vibration holes (2) and fracturing holes (3), which are distributed one by one, by using known tool and technology; on the fracturing holes (3), fracturing a coal bed (1) by using fracturing equipment of which the outside diameter is matched with the aperture of the fracturing holes (3) and by a pressure higher than a stratum cracking pressure, and after the fracturing, starting vibration equipment to allow the vibration equipment to perform continuous vibration operation in the vibration holes (2) at a proper vibration frequency; and mounting gas production equipment on the fracturing holes (3), and relieving pressure of the coal bed (1) and drainage coal bed gas by using the conventional method. In the invention, the flowing state of the coal bed gas in the coal bed (1) is improved; and the coal bed is subjected to alternating tensile stress and pressure stress so that the coal bed gas can desorbs, diffuse and flow from micropores, which creates a good condition for the internal pressure relief and coal bed gas release and flowing and increases the drainage efficiency of the coal bed gas.
Description
Technical field
The present invention relates to coal-bed gas exploitation technology field, the particularly a kind of brill of high gas low permeability coal seam, Trinity release method for exploiting coal bed methane of pressing, shake of being applicable to.
Background technology
Contain a large amount of coal bed gas in the coal seam, be called gas again, it is not only valuable resource, also is the important component part that coal and gas are given prominence to potential in the underground mining of colliery, and its main component is a methane.China is coal resources big countries, and along with the high speed development and the scale of coal industry increases suddenly, gas emission increases, and this coal mining accident outstanding, that blast causes of invar rises rapidly.Yet coal bed gas is again the fuel of a kind of high-quality, cleaning, if reasonably developed, reclaim and utilize, not only can reduce the generation of coal mining accident, ensures the ordinary production in colliery, can also solve the problem of China's energy scarcity.About 36 tcms of the coal bed gas resource amount of China, this numerical value is suitable with the natural gas resource amount.China successfully realizes technology such as mined bed extraction coal bed gas, adjacent layer extraction coal bed gas, goaf extraction coal bed gas, country rock extraction coal bed gas; And in the protrusion-dispelling of territory, large, medium and small moulded coal mining area, the whole nation, obtained widely using, in coal bed gas extraction, control gas explosion with reduce coal and obtained some effects aspect giving prominence to gas.Because China's ocurrence of coal seam complicated geological condition; Gas bearing capacity is high, and the permeability in coal seam is low, so bigger difficulty aspect the coal bed gas extraction, occurs; Though also adopted some to improve the method for seam mining efficient at present in high gas hypotonicity coal seam, its specific adaptations condition respectively arranged.
Summary of the invention
The purpose of this invention is to provide a kind of brill of high gas low permeability coal seam, Trinity release method for exploiting coal bed methane of pressing, shake of being applicable to; High pressure fracturing process, method for oscillating are combined with drilling construction; Pressure break and vibration service are carried out in the coal seam, increase the extraction efficient of coal bed gas in the coal seam.
The object of the invention can be realized through following technique measures (step):
The present invention combines high pressure fracturing process, method for oscillating with drilling construction, through pressure break hole and vibration hole are set in the coal seam, drive the crack that occurs after the original or pressure break in the coal seam; Widen and stretch these cracks, and then in the coal seam, produce more secondary fracture and crack, improve the flow regime of coal bed gas in the coal seam; Increase the gas permeability of coal bed gas in the coal seam, simultaneously, according to the action principle of mechanical oscillation; In the coal seam, implement vibration service, changed the physical and mechanical properties in coal seam, thereby reduce coal increases coal bed gas to the adsorbance of coal bed gas desorption quantity; Improve the coal seam permeability, increase the extraction efficient of coal bed gas in the coal seam.
(1) the at first physical characteristic of detail knowledge extraction target coal seam and tectonic characteristics in case of necessity, cooperate test measures such as geodetic stress;
(2) on said coal seam, select one or more hardness are high relatively or density is big relatively orientation as along layer or wear a layer vibration Kong Kongwei, simultaneously, suitably distance is arranged position, hole, one or more pressure breaks hole around each vibration Kong Kongwei;
(3) then; Adopt the known means technology one by one bore operation to be implemented in vibration Kong Kongwei and the position, hole, pressure break hole arranged; The degree of depth that the pressure break hole gets into the coal seam should satisfy safe sealing of hole requirement; The degree of depth that said vibration hole gets into the coal seam should be determined by the tectonic characteristics in coal seam, is prerequisite not bring out gas outstanding after the sealing of hole vibration, and the aperture in vibration hole should be slightly larger than the vibratory equipment external diameter;
(4) after vibration hole and pressure break hole are accomplished fluently; Utilize mounting rod explosion-proof or intrinsic safety type vibratory equipment to be inserted at the bottom of the hole in vibration hole; Top and each fixing fastening devices of bottom at vibratory equipment; And fill with couplant in the gap between vibratory equipment and vibration hole, utilize sealing device to seal in the aperture in vibration hole then;
(5) confirm that the sealing of vibration hole is errorless after, on the pressure break hole, the fracturing unit that adopts external diameter and aperture, pressure break hole to be complementary; To be higher than formation fracture pressure fracturing work is carried out in the coal seam, when pressure in the pressure break hole reaches certain pressure, keep this pressure a period of time; When pressing in the pressure break hole with cracks in coal seam expansion reduction; Improve frac pressure once more, so circulation stops behind the pressure complete stability;
(6) after pressure break finishes; Opening vibratory equipment makes it in the vibration hole, implement the sustained vibration operation with suitable vibration frequency; Make the coal seam receive the tensile stress and the action of compressive stress of alternate; Simultaneously, on the pressure break aperture, change aerogenesis equipment, utilize conventional method that the pressure relief extraction coal bed gas is carried out in the coal seam.
The bore mode in said vibration hole and pressure break hole is looked extraction target coal seam geological conditions and is decided, according to coal seam geostatic stress and mechanical strength, the boring trend in vibration hole and pressure break hole can be designed to directly to or song to; Said vibration service frequency should be the best to reach the high anti-reflection property of coal bed gas according to the coal geology construction features;
Beneficial effect of the present invention is following:
Brill of the present invention, the Trinity release method for exploiting coal bed methane of pressing, shake combine high pressure fracturing process, method for oscillating with drilling construction, adopt pressure break to drive the crack that occurs after the original or pressure break in the coal seam; Widen and stretch these cracks, and then in the coal seam, produce more secondary fracture and crack, improved the flow regime of coal bed gas in the coal seam greatly; Increase the gas permeability of coal bed gas in the coal seam, simultaneously, according to the action principle of mechanical oscillation; In the coal seam, implement vibration service; Make the coal seam receive the tensile stress and the action of compressive stress of alternate, the extensional vibration that produces density interphase helps coal bed gas desorb from the micropore, diffusion and mobile; Improved the permeability of coal bed gas; Give the inner release in coal seam, coal bed gas release and flow and created good condition, increase the extraction efficient of coal bed gas, thereby realized simple and easy and coal bed gas extraction operation reliably.
Description of drawings
Fig. 1 is a brill of the present invention, the Trinity release method for exploiting coal bed methane of pressing, shake boring sketch map;
Be labeled as among the figure: 1: the coal seam; 2: the vibration hole; 3: the pressure break hole.
The specific embodiment
To combine an embodiment (accompanying drawing) to further describe below the present invention:
As shown in Figure 1, brill of the present invention, the Trinity release method for exploiting coal bed methane of pressing, shake, the practical implementation step is following:
(1) the at first physical characteristic of detail knowledge extraction target coal seam 1 and tectonic characteristics in case of necessity, cooperate test measures such as geodetic stress;
(2) on said coal seam 1, select one or more hardness are high relatively or density is big relatively orientation as along layer or wear a layer vibration position, 2 hole, hole, simultaneously, suitably distance is arranged position, 3 hole, one or more pressure breaks hole around each vibration position, 2 hole, hole;
(3) then; Adopt the known means technology one by one to the position, hole in the vibration hole 2 arranged and position, the hole enforcement bore operation in pressure break hole 3; The degree of depth in 3 entering coal seams, pressure break hole should satisfy safe sealing of hole requirement; The degree of depth in 2 entering coal seams 1, said vibration hole should be determined by the tectonic characteristics in coal seam, is prerequisite not bring out gas outstanding after the sealing of hole vibration, and the aperture in vibration hole 2 should be slightly larger than the vibratory equipment external diameter;
(4) after vibration hole 2 is accomplished fluently with pressure break 3 holes; Utilize mounting rod explosion-proof or intrinsic safety type vibratory equipment to be inserted at the bottom of the hole in vibration hole 2; Top and each fixing fastening devices of bottom at vibratory equipment; And fill with couplant in the gap between vibratory equipment and vibration hole 2, utilize sealing device to seal in the aperture in vibration hole 2 then;
(5) confirm that 2 sealings of vibration hole are errorless after, on pressure break hole 3, the fracturing unit that adopts external diameter and 3 apertures, pressure break hole to be complementary; To be higher than formation fracture pressure fracturing work is carried out in coal seam 1, when pressure in the pressure break hole 3 reaches certain pressure, keep this pressure a period of time; When pressing in the pressure break hole 3 with cracks in coal seam expansion reduction; Improve frac pressure once more, so circulation stops behind the pressure complete stability;
(6) after pressure break finishes; Opening vibratory equipment makes it in vibration hole 2, implement the sustained vibration operation with suitable vibration frequency; Make coal seam 1 receive the tensile stress and the action of compressive stress of alternate, described vibration frequency should be the best to reach the high anti-reflection property of coal bed gas according to coal seam 1 tectonic characteristics, simultaneously; Change aerogenesis equipment in the pressure break hole on 3 mouthfuls, utilize conventional method that the pressure relief extraction coal bed gas is carried out in coal seam 1.
The bore mode that should be noted that said vibration hole 2 and pressure break hole 3 is looked coal seam 1 geological conditions and decide, according to coal seam geostatic stress and mechanical strength, the boring trend in vibration hole 2 and pressure break hole 3 can be designed to directly to or song to;
Brill of the present invention, the Trinity release method for exploiting coal bed methane of pressing, shake combine high pressure fracturing process, method for oscillating with drilling construction, adopt pressure break to drive the crack that occurs after the original or pressure break in the coal seam; Widen and stretch these cracks, and then in the coal seam, produce more secondary fracture and crack, improved the flow regime of coal bed gas in the coal seam greatly; Increase the gas permeability of coal bed gas in the coal seam, simultaneously, according to the action principle of mechanical oscillation; In the coal seam, implement vibration service; Make the coal seam receive the tensile stress and the action of compressive stress of alternate, the extensional vibration that produces density interphase helps coal bed gas desorb from the micropore, diffusion and mobile; Improved the permeability of coal bed gas; Give the inner release in coal seam, coal bed gas release and flow and created good condition, increase the extraction efficient of coal bed gas, thereby realized simple and easy and coal bed gas extraction operation reliably.
Claims (2)
1. the Trinity release method for exploiting coal bed methane that bores, presses, shakes comprises following step, it is characterized in that:
Step 1, at first the physical characteristic and the tectonic characteristics of detail knowledge extraction target coal seam (1) cooperate the measure of geodetic stress test;
Step 2 is upward selected the suitable layer of orientation conduct that one or more hardness are high relatively or density is big relatively or is worn a layer vibration position, hole, hole (2) in said coal seam (1), simultaneously, vibrates Kong Kongwei on every side suitably apart from arranging position, hole, one or more pressure breaks holes (3) at each;
Step 3; Then; Adopt the known means technology one by one bore operation to be implemented in the position, hole in the vibration hole (2) arranged and the position, hole of pressure break hole (3), the degree of depth in pressure break hole (3) entering coal seams (1) should satisfy safe sealing of hole requirement, and the aperture in said vibration hole (2) should be slightly larger than the vibratory equipment external diameter; The degree of depth that vibration hole (2) gets into coal seam (1) should be a prerequisite not bring out gas outstanding after the sealing of hole vibration by the tectonic characteristics decision of coal seam (1);
Step 4; After vibration hole (2) and pressure break hole (3) are accomplished fluently; Utilize mounting rod explosion-proof or intrinsic safety type vibratory equipment to be inserted at the bottom of the hole in vibration hole (2); In top and each fixing fastening devices of bottom of vibratory equipment, and fill with couplant in the gap between vibratory equipment and vibration hole (2), utilize sealing device to seal in the aperture in vibration hole (2) then;
Step 5 is after definite vibration hole (2) sealing is errorless, on pressure break hole (3); The fracturing unit that adopts external diameter and aperture, pressure break hole (3) to be complementary carries out fracturing work to be higher than formation fracture pressure to coal seam (1), when pressure in pressure break hole (3) reaches certain pressure; Keep this pressure a period of time, when pressing in pressure break hole (3), improve frac pressure once more with cracks in coal seam expansion reduction; So circulation stops behind the pressure complete stability;
Step 6; After pressure break finishes; Open vibratory equipment and make it in vibration hole (2), implement the sustained vibration operation with suitable vibration frequency, the frequency of said vibration service should be according to coal seam (1) tectonic characteristics to reach the high anti-reflection property of coal bed gas, simultaneously; On the pressure break aperture, change aerogenesis equipment, utilize conventional method that the pressure relief extraction coal bed gas is carried out in coal seam (1).
2. brill as claimed in claim 1, the Trinity release method for exploiting coal bed methane of pressing, shake; It is characterized in that: the bore mode of said vibration hole (2) and pressure break hole (3) is looked extraction target coal seam (1) geological conditions and is decided; According to coal seam geostatic stress and mechanical strength, the boring trend of vibration hole (2) and pressure break hole (3) be designed to directly to or song to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545678XA CN102022134B (en) | 2010-11-16 | 2010-11-16 | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545678XA CN102022134B (en) | 2010-11-16 | 2010-11-16 | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102022134A CN102022134A (en) | 2011-04-20 |
| CN102022134B true CN102022134B (en) | 2012-11-07 |
Family
ID=43863865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010545678XA Expired - Fee Related CN102022134B (en) | 2010-11-16 | 2010-11-16 | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102022134B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022135A (en) * | 2010-11-16 | 2011-04-20 | 郑州大学 | Drilling, pressing and vibrating trinity pressure-relief and outburst-prevention method |
| CN102392678A (en) * | 2011-10-21 | 2012-03-28 | 河南煤业化工集团研究院有限责任公司 | Gas drainage method combining surface and underground fracturing and permeability improvement |
| CN103206238A (en) * | 2013-04-02 | 2013-07-17 | 贵州大学 | Method for preventing and controlling gas on low-permeability outburst coal seams |
| CN103397900B (en) * | 2013-07-15 | 2015-06-10 | 中国矿业大学 | Porous collaborative fracturing and extracting integrated gas extraction method |
| CN105804786B (en) * | 2016-03-15 | 2017-12-01 | 安徽理工大学 | A kind of weak seam bottom plate layer-through drilling pressure rushes anti-reflection method |
| CN107035344A (en) * | 2017-06-05 | 2017-08-11 | 贵州大学 | A kind of coal bed gas pumping method of low permeability outburst coal seam |
| CN107676126B (en) * | 2017-10-16 | 2019-01-29 | 重庆大学 | It is a kind of to utilize the concordant region hydraulic fracturing method for intercepting control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227293B1 (en) * | 2000-02-09 | 2001-05-08 | Conoco Inc. | Process and apparatus for coupled electromagnetic and acoustic stimulation of crude oil reservoirs using pulsed power electrohydraulic and electromagnetic discharge |
| CN101082270A (en) * | 2007-07-10 | 2007-12-05 | 中国海洋石油总公司 | Drilling fluid treatment system |
| US7647969B1 (en) * | 2003-07-07 | 2010-01-19 | Hill Gilman A | Method for growth of a hydraulic fracture along a well bore annulus and creating a permeable well bore annulus |
| CN201606045U (en) * | 2010-01-04 | 2010-10-13 | 刘佳 | Aerodynamic deep penetrating productivity and injection increasing device aerodynamic aerodynamic force |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101023241A (en) * | 2004-09-22 | 2007-08-22 | 国际壳牌研究有限公司 | Method of drilling a lossy formation |
| US7422060B2 (en) * | 2005-07-19 | 2008-09-09 | Schlumberger Technology Corporation | Methods and apparatus for completing a well |
| US7845409B2 (en) * | 2005-12-28 | 2010-12-07 | 3M Innovative Properties Company | Low density proppant particles and use thereof |
-
2010
- 2010-11-16 CN CN201010545678XA patent/CN102022134B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227293B1 (en) * | 2000-02-09 | 2001-05-08 | Conoco Inc. | Process and apparatus for coupled electromagnetic and acoustic stimulation of crude oil reservoirs using pulsed power electrohydraulic and electromagnetic discharge |
| US7647969B1 (en) * | 2003-07-07 | 2010-01-19 | Hill Gilman A | Method for growth of a hydraulic fracture along a well bore annulus and creating a permeable well bore annulus |
| CN101082270A (en) * | 2007-07-10 | 2007-12-05 | 中国海洋石油总公司 | Drilling fluid treatment system |
| CN201606045U (en) * | 2010-01-04 | 2010-10-13 | 刘佳 | Aerodynamic deep penetrating productivity and injection increasing device aerodynamic aerodynamic force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102022134A (en) | 2011-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102022134B (en) | Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method | |
| CN102080525B (en) | High-pressure gas injection hole-drilling pressure-releasing outburst prevention method | |
| CN207245618U (en) | A kind of all-electric ultrasonic driller | |
| CN107503687A (en) | A kind of all-electric ultrasonic driller and drilling method | |
| Jing et al. | Application of geology-engineering integration in development of tight oil in Xinjiang Oilfield | |
| CN102493795A (en) | Method for gasification fracturing of liquid nitrogen in hydrocarbon reservoirs | |
| CN107941097A (en) | A kind of process of liquid carbon dioxide fracturing rock | |
| CN103233738A (en) | Comprehensive weakening method of top coal of heavy-pitch super high seam | |
| Tian et al. | Laboratory experiments on blockage removing and stimulation of CBM reservoirs by composite pulsating hydraulic fracturing of radial horizontal wells | |
| CN105114117A (en) | Gas drainage method based on expansion material | |
| Chen et al. | Analysis and application on controlling thick hard roof caving with deep‐hole position presplitting blasting | |
| Wang et al. | Analysis of the cavity formation mechanism of wedge cut blasting in hard rock | |
| CN108266226A (en) | A kind of rock burst solution danger method based on hydraulic machinery splitting | |
| CN102022135A (en) | Drilling, pressing and vibrating trinity pressure-relief and outburst-prevention method | |
| CN102011574B (en) | Method for increasing yield of coal bed methane through vibration | |
| CN112943210A (en) | Electric pulse and ultrasonic wave cooperated coalbed methane enhanced mining method | |
| Chai et al. | Key Blasting Parameters for Deep‐Hole Excavation in an Underground Tunnel of Phosphorite Mine | |
| Yang et al. | Optimization and field application of water jet for coal bed methane stimulation | |
| CN203081412U (en) | Device capable of increasing coal seam permeability | |
| Xu et al. | The pressure relief and permeability increase mechanism of crossing-layers directional hydraulic fracturing and its application | |
| Li et al. | Numerical Investigation on Rock‐Fracturing Mechanism by Using Splitter under Hole Assistance | |
| Tan et al. | Stability analysis and determination of large-section multi-chamber group in deep coal mine | |
| Qiu et al. | Experimental Study on the Blasting Performance of Water‐Soil Composite Stemming in Underground Mines | |
| Du et al. | Study on the evolution law of fracture field in full‐mechanized caving mining of double system and extrathick coal seam | |
| RU2394991C1 (en) | Procedure for solid coal weakening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211115 Address after: 467000 East Section of Shenma Avenue, Pingdingshan City, Henan Province (150 meters east of Shenma Chlor-alkali Company), Fourth Workshop of Henan Jiangzhou Electric Co.,Ltd. Patentee after: Henan dikal Electromechanical Equipment Manufacturing Co.,Ltd. Address before: 450001 No. 100, science Avenue, high tech Industrial Development Zone, Zhengzhou, Henan Patentee before: Zhengzhou University |
|
| 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: 20121107 |