CN104563859A - Hydro-hammer - Google Patents
Hydro-hammer Download PDFInfo
- Publication number
- CN104563859A CN104563859A CN201310503876.3A CN201310503876A CN104563859A CN 104563859 A CN104563859 A CN 104563859A CN 201310503876 A CN201310503876 A CN 201310503876A CN 104563859 A CN104563859 A CN 104563859A
- Authority
- CN
- China
- Prior art keywords
- hammer head
- head assembly
- component
- turbine
- rotary blade
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000003082 abrasive agent Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 11
- 230000003116 impacting effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000737 periodic effect Effects 0.000 abstract description 2
- 241000251131 Sphyrna Species 0.000 abstract 5
- 239000011435 rock Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hydro-hammer. The hydro-hammer comprises an impacting seat 1, a drive sleeve 2, a shell 3, a guide sleeve 4, a hammerhead component 5, a rotator component 6, a turbine component 7 and a connector 8. High-pressure fluids flow into the hydro-hammer from the connector 8 which is connected with the turbine component 7, the turbine component 7 is connected with the rotator component 6 through a drive shaft, the rotator component 6 sleeves the hammerhead component 5, and the hammerhead component 5 can reciprocate along the axis direction of the hydro-hammer under drive of the rotator component 6. When the rotator component 6 rotates around own axis under drive of the turbine component 7, a changeable space a can be formed above the hammerhead component 5, and high-speed fluids enter the changeable space to provide storage energy for downward impacting. The hydro-hammer has the advantages that kinetic energy of the high-pressure fluids are converted into periodic impacting actions to enable a hammerhead to reciprocate to impact a drill bit interruptedly, underground operation efficiency can be improved substantially according to the principle, and accordingly, well drilling time is shortened, drilling cost is saved and economic and social benefits are improved.
Description
Technical field
The present invention relates to a kind of hydraulic impacter, particularly down-hole hydraulic impacter, be mainly used in the drilling well of rock stratum, oil field, belong to the special jewel well tool of petroleum industry oil-gas exploration.
Background technology
Petroleum gas drilling domestic at present adopts traditional drilling tool exploitation mostly, mainly rock is broken in rotary drilling, when drill bit meets rock stratum because rock drillability is poor, the method efficiency of rotational shear fragmentation is very low, and the serious wear of rock on drill bit and drilling tool affects the operating efficiency of drill bit.What require along with exploitation improves constantly, and mode of creeping into traditional at present can not meet the requirement of fast drilling.
Summary of the invention
The object of the present invention is to provide one significantly can improve rate of penetration, hydraulic impacter easy to loading and unloading, solve the shortcoming that prior art exists.
The present invention adopts following technical scheme to realize:
A kind of hydraulic impacter, it is characterized in that, this hydraulic impacter comprises striker 1, drive sleeve 2, shell 3, fairlead 4, Hammer head assembly 5, rotating body component 6, turbine assembly 7, joint 8, high-pressure fluid flows in impactor from described joint 8, joint 8 is connected with turbine assembly 7, described turbine assembly 7 is connected with rotating body component 6 by power transmission shaft, Hammer head assembly 5 is set with in described rotating body component 6, described Hammer head assembly 5 can move reciprocatingly along the axis direction of hydraulic impacter under the drive of rotating body component 6, when rotating body component 6 do under the drive of turbine assembly 7 rotate from axle time, the top of Hammer head assembly 5 can form variable spaces a, high-velocity fluid enters in variable spaces a by compression supercharging, for Hammer head assembly 5 provides the savings energy impacted downwards.
Further, the external surface of described Hammer head assembly 5 compartment of terrain that interlocks is provided with rotary blade b, described rotating body component 6 has the rotor groove d with described rotary blade b Corresponding matching.
Further, described rotary blade b has two row, external surface along described Hammer head assembly 5 is uniformly distributed, the rotary blade b of same column is spaced apart, be interspersed between two row rotary blade b, the quantity of described rotary blade b is 2 ~ 30, and the hoisting depth of each rotary blade b is 2 ~ 500mm, the spiral angle of each rotary blade b is 30 ° ~ 330 °, and the coil width of each rotary blade b is 10 ~ 40mm.
Further, one end of described fairlead 4 is provided with guide peg, and one end of described Hammer head assembly 5 correspondence is provided with the gathering sill mated with described guide peg.
Further, four holes have been opened in the power transmission shaft turbine lower end of described turbine assembly 7, and central through hole and this four holes of power transmission shaft are communicated with lower flow passage.
Further, described turbine assembly 7 is along axis distribution 1 ~ 50 grade, and every grade of turbine is all made up of stators and rotators.
Further, the upper and lower side of described turbine assembly 7 all arranges and produces for reducing turbine rotation the wavy spring packing ring impacted, and is also provided with wavy spring stroke limit protection ring.
Further, the helical wing plate of described rotating body component 6 has the fluting or circular hole of inlaying high-abrasive material, fluting or the interior material welded or inlay of circular hole can be hard alloy blocks, diamond compact, the high abrasion such as tungsten carbide or nickel-base alloy welding medium, increase work plane anti-wear performance altogether, increase the service life.
Further, the helical wing plate of described Hammer head assembly 5 has the fluting or circular hole of inlaying high-abrasive material, fluting or the interior material welded or inlay of circular hole can be hard alloy blocks, diamond compact, tungsten carbide or Ni-based welding medium, increase work plane anti-wear performance, increase the service life.
The Advantageous Effects that the present invention possesses is: the kinetic energy of high-pressure fluid is converted to periodic percussion action and moves reciprocatingly interruption drill hammer by tup, this principle is utilized can significantly to improve underground work efficiency, shorten drilling time thus save drilling cost, improving economic and social benefit.
Accompanying drawing explanation
Fig. 1 is the integral installation figure of hydraulic impacter.
Fig. 2 is the rotating body component of hydraulic impacter.
Fig. 3 is the Hammer head assembly of hydraulic impacter.
Fig. 4 is the schematic diagram of fairlead.
Detailed description of the invention
Main thought of the present invention installs this instrument in Bottom Hole Assembly (BHA) in drillng operation, and the reciprocating motion utilizing highly pressurised liquid to realize tup as power makes impact loading realize rotating and impacting composite breaking rock stratum in drill bit.By below to the description of embodiment; to more contribute to public understanding the present invention; but the restriction that the specific embodiment given by applicant can't be considered as technical solution of the present invention, any definition to parts or technical characteristic change and/or to overall structure do form and immaterial conversion all should be considered as the protection domain that technical scheme of the present invention limits.
Hydraulic impacter as shown in Figures 1 to 4, this hydraulic impacter comprises striker 1, drive sleeve 2, shell 3, fairlead 4, Hammer head assembly 5, rotating body component 6, turbine assembly 7, joint 8, high-pressure fluid flows in impactor from joint 8, first enter in turbine assembly 7, the kinetic transformation of high-velocity fluid is the kinetic energy in rotary motion direction by turbine, thus band is automatically connected in the rotation of the rotating body component 6 on turbine assembly 7, turbine assembly 7 inside has several thrust ball bearing string to ensure the smooth and easy of turbine assembly rotary motion.Joint 8 is connected with turbine assembly 7, turbine assembly 7 is connected with rotating body component 6 by power transmission shaft, Hammer head assembly 5 is set with in rotating body component 6, Hammer head assembly 5 can move reciprocatingly along the axis direction of hydraulic impacter under the drive of rotating body component 6, when rotating body component 6 do under the drive of turbine assembly 7 rotate from axle time, the top of Hammer head assembly 5 can form variable spaces a, high-velocity fluid enters by compression supercharging in variable spaces a, for Hammer head assembly 5 provides the savings energy impacted downwards.One end of fairlead 4 is provided with guide peg, one end of Hammer head assembly 5 correspondence is provided with the gathering sill mated with guide peg, guide peg and gathering sill cooperatively interact, and limit the motion that rotates in a circumferential direction of Hammer head assembly 5, thus Hammer head assembly 5 can only be moved reciprocatingly along axis.Four holes have been opened in the power transmission shaft turbine lower end of turbine assembly 7, and central through hole and this four holes of power transmission shaft are communicated with lower flow passage.Turbine assembly 7 is along axis distribution 1 ~ 50 grade, and every grade of turbine is all made up of stators and rotators.The upper and lower side of turbine assembly 7 is all arranged for reducing in turbine rotation the wavy spring packing ring producing impact, is also provided with wavy spring stroke limit protection ring.
When under free state, (when namely this hydraulic impacter is in bottom) Hammer head assembly 5 is near fairlead 4 side, when have in drilling rod have highly pressurised liquid to flow through turbine assembly 7 time, turbine produces High Rotation Speed, by power transmission shaft driven rotary body assembly 6 High Rotation Speed, rotating body component 6 is screw joining manner (being similar to thread connecting mode) with the connected mode of Hammer head assembly 5, because the gathering sill c of tup and fairlead lead d forms the annexation of in axial direction moving only, namely Hammer head assembly 5 can only move reciprocatingly and can not rotate, make Hammer head assembly 5 can only move back and forth along axis like this, thus drive Hammer head assembly 5 to move upward when rotating body component 6 rotates, when Hammer head assembly 5 rises to a setting height (2 ~ 50mm), Hammer head assembly 5 promote process in the fluid compression supercharging in its top and rotating body component, thus be the downward ballistic motion savings kinetic energy of Hammer head assembly 5, after rotating body component 6 rotates 30 ° again, spiral between rotating body component 6 and Hammer head assembly 5 is thrown off suddenly, highly pressurised liquid energy now above Hammer head assembly 5 starts release, Hammer head assembly 5 is driven to produce high speed impact, act directly on fairlead 4, impact force to be delivered on striker on 1 by fairlead 4, so just for the drill bit be connected on striker 1 provides moment impact, thus produce rock breaking efficiency lifting bit operation efficiency.
The external surface of Hammer head assembly 5 compartment of terrain that interlocks is provided with rotary blade b, rotating body component 6 has the rotor groove d with rotary blade b Corresponding matching.Because the direction of rotary blade b is contrary distribution with the rotor groove d direction of rotation of rotary body, therefore rotating body component 6 will drive moving upward of Hammer head assembly 5 when rotating, move to Automatic-falling Hammer head assembly 5 between a setting height rear screw and be adjacent to striker end face bottom pressure and Action of Gravity Field lower ram assembly 6, thus complete once complete percussion action.As preferred technical scheme: rotary blade b has two row, external surface along Hammer head assembly 5 is uniformly distributed, the rotary blade b of same column is spaced apart, be interspersed between two row rotary blade b, the quantity of described rotary blade b is 2 ~ 30, the hoisting depth of each rotary blade b is 2 ~ 50mm, and the spiral angle of each rotary blade b is 30 ° ~ 330 °, and the coil width of each rotary blade b is 10 ~ 40mm.
Certainly; the present invention can also have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (9)
1. a hydraulic impacter, it is characterized in that, this hydraulic impacter comprises striker (1), drive sleeve (2), shell (3), fairlead (4), Hammer head assembly (5), rotating body component (6), turbine assembly (7), joint (8), high-pressure fluid flows in impactor from described joint (8), joint (8) is connected with turbine assembly (7), described turbine assembly (7) is connected with rotating body component (6) by power transmission shaft, Hammer head assembly (5) is set with in described rotating body component (6), described Hammer head assembly (5) can move reciprocatingly along the axis direction of hydraulic impacter under the drive of rotating body component (6), when rotating body component (6) do under the drive of turbine assembly (7) rotate from axle time, the top of Hammer head assembly (5) can form variable spaces (a), high-velocity fluid enters in variable spaces (a) by compression supercharging, savings energy is impacted downwards for Hammer head assembly (5) provides.
2. hydraulic impacter according to claim 1 is characterized in that, the external surface of described Hammer head assembly (5) compartment of terrain that interlocks is provided with rotary blade (b), described rotating body component (6) has rotor groove (d) with described rotary blade (b) Corresponding matching.
3. hydraulic impacter according to claim 2, it is characterized in that, described rotary blade (b) has two row, external surface along described Hammer head assembly (5) is uniformly distributed, and the rotary blade (b) of same column is spaced apart, is interspersed between two row rotary blade (b), the quantity of described rotary blade (b) is 2 ~ 30, the hoisting depth of each rotary blade (b) is 2 ~ 50mm, and the spiral angle of each rotary blade (b) is 30 ° ~ 330 °, and the coil width of each rotary blade (b) is 10 ~ 40mm.
4. the hydraulic impacter according to claim 1 or 2 or 3, is characterized in that, one end of described fairlead (4) is provided with guide peg, and one end that described Hammer head assembly (5) is corresponding is provided with the gathering sill mated with described guide peg.
5. the hydraulic impacter according to claim 1 or 2 or 3, is characterized in that, four holes have been opened in the power transmission shaft turbine lower end of described turbine assembly (7), and central through hole and this four holes of power transmission shaft are communicated with lower flow passage.
6. the hydraulic impacter according to claim 1 or 2 or 3, is characterized in that, described turbine assembly (7) is along axis distribution 1 ~ 50 grade, and every grade of turbine is all made up of stators and rotators.
7. the hydraulic impacter according to claim 1 or 2 or 3, is characterized in that, the upper and lower side of described turbine assembly (7) is all arranged for reducing in turbine rotation the wavy spring packing ring producing impact, is also provided with wavy spring stroke limit protection ring.
8. hydraulic impacter according to claim 1, it is characterized in that, the helical wing plate of described rotating body component has the fluting inlaying high-abrasive material or circular hole, fluting or the interior material welded or inlay of circular hole can be the high abrasion welding mediums such as hard alloy blocks, diamond compact, tungsten carbide or nickel-base alloy, increase work plane anti-wear performance altogether, increase the service life.
9. hydraulic impacter according to claim 1, it is characterized in that, the helical wing plate of described Hammer head assembly has the fluting inlaying high-abrasive material or circular hole, fluting or the interior material welded or inlay of circular hole can be hard alloy blocks, diamond compact, tungsten carbide or Ni-based welding medium, increase work plane anti-wear performance, increase the service life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503876.3A CN104563859B (en) | 2013-10-13 | 2013-10-13 | Hydro-hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503876.3A CN104563859B (en) | 2013-10-13 | 2013-10-13 | Hydro-hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104563859A true CN104563859A (en) | 2015-04-29 |
| CN104563859B CN104563859B (en) | 2017-04-12 |
Family
ID=53080846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310503876.3A Expired - Fee Related CN104563859B (en) | 2013-10-13 | 2013-10-13 | Hydro-hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104563859B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239921A (en) * | 2015-11-18 | 2016-01-13 | 东北石油大学 | Hydraulic-drive impactor |
| CN105239922A (en) * | 2015-10-08 | 2016-01-13 | 西南石油大学 | Local reciprocating type hydraulic-impact well drilling speed increasing tool |
| CN105298381A (en) * | 2015-10-19 | 2016-02-03 | 西南石油大学 | Downhole motor realizing efficient rock breaking by composite vibration impacts |
| US11480048B2 (en) | 2020-09-17 | 2022-10-25 | Saudi Arabian Oil Company | Seismic-while-drilling systems and methodology for collecting subsurface formation data |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2029848C1 (en) * | 1992-06-30 | 1995-02-27 | Анатолий Васильевич Зайцев | In-stope hydraulic power low frequency impactor |
| CN102966305A (en) * | 2012-12-11 | 2013-03-13 | 闫铁 | Near-bit circumferential resonance impacter |
| CN103244052A (en) * | 2013-05-15 | 2013-08-14 | 西南石油大学 | Hydraulic hammer rod type impact drilling tool |
| CN103291214A (en) * | 2013-06-19 | 2013-09-11 | 中国石油大学(华东) | Reciprocating type hydraulic-drive impacter |
| CN203685022U (en) * | 2013-10-13 | 2014-07-02 | 成都恩承油气有限公司 | Liquid-operated impactor |
-
2013
- 2013-10-13 CN CN201310503876.3A patent/CN104563859B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2029848C1 (en) * | 1992-06-30 | 1995-02-27 | Анатолий Васильевич Зайцев | In-stope hydraulic power low frequency impactor |
| CN102966305A (en) * | 2012-12-11 | 2013-03-13 | 闫铁 | Near-bit circumferential resonance impacter |
| CN103244052A (en) * | 2013-05-15 | 2013-08-14 | 西南石油大学 | Hydraulic hammer rod type impact drilling tool |
| CN103291214A (en) * | 2013-06-19 | 2013-09-11 | 中国石油大学(华东) | Reciprocating type hydraulic-drive impacter |
| CN203685022U (en) * | 2013-10-13 | 2014-07-02 | 成都恩承油气有限公司 | Liquid-operated impactor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239922A (en) * | 2015-10-08 | 2016-01-13 | 西南石油大学 | Local reciprocating type hydraulic-impact well drilling speed increasing tool |
| CN105298381A (en) * | 2015-10-19 | 2016-02-03 | 西南石油大学 | Downhole motor realizing efficient rock breaking by composite vibration impacts |
| CN105239921A (en) * | 2015-11-18 | 2016-01-13 | 东北石油大学 | Hydraulic-drive impactor |
| CN105239921B (en) * | 2015-11-18 | 2018-04-06 | 东北石油大学 | A kind of hydraulic impacter |
| US11480048B2 (en) | 2020-09-17 | 2022-10-25 | Saudi Arabian Oil Company | Seismic-while-drilling systems and methodology for collecting subsurface formation data |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104563859B (en) | 2017-04-12 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 610031 Sichuan city of Chengdu province Chenghua District Bay, No. 66 Applicant after: CHENGDU EN-SHAIN TECHNOLOGY Inc. Applicant after: SICHUAN ROREI TECHNOLOGY CO.,LTD. Address before: 610031 Sichuan city of Chengdu province Chenghua District Bay, No. 66 Applicant before: CHENGDU EN-SHINE OIL & GAS Co.,Ltd. Applicant before: SICHUAN ROREI TECHNOLOGY CO.,LTD. |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A kind of hydraulic impacter Effective date of registration: 20180326 Granted publication date: 20170412 Pledgee: Sichuan Tianfu financial leasing Limited by Share Ltd. Pledgor: SICHUAN ROREI TECHNOLOGY CO.,LTD.|CHENGDU EN-SHAIN TECHNOLOGY Inc. Registration number: 2018510000034 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191226 Granted publication date: 20170412 Pledgee: Sichuan Tianfu financial leasing Limited by Share Ltd. Pledgor: CHENGDU EN-SHAIN TECHNOLOGY Inc.|SICHUAN ROREI TECHNOLOGY CO.,LTD. Registration number: 2018510000034 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Hydraulic impactor Effective date of registration: 20200102 Granted publication date: 20170412 Pledgee: Sichuan Tianfu financial leasing Limited by Share Ltd. Pledgor: CHENGDU EN-SHAIN TECHNOLOGY Inc.|SICHUAN ROREI TECHNOLOGY CO.,LTD. Registration number: Y2020510000001 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211025 Granted publication date: 20170412 Pledgee: Sichuan Tianfu financial leasing Limited by Share Ltd. Pledgor: CHENGDU EN-SHAIN TECHNOLOGY Inc.|SICHUAN ROREI TECHNOLOGY CO.,LTD. Registration number: Y2020510000001 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |