CN207526481U - Modularization pulley connector - Google Patents
Modularization pulley connector Download PDFInfo
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- CN207526481U CN207526481U CN201721260059.XU CN201721260059U CN207526481U CN 207526481 U CN207526481 U CN 207526481U CN 201721260059 U CN201721260059 U CN 201721260059U CN 207526481 U CN207526481 U CN 207526481U
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- outer sleeve
- soft contact
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Abstract
The utility model is related to the technical fields of perforation gun joint, it is a kind of modularization pulley connector, it includes joint body, left soft contact component, right soft contact component, left soft contact component is separately positioned on the left and right ends of joint body with right soft contact component, live wire is set in joint body, and the left and right ends of electric wire are electrically connected respectively with left soft contact component, right soft contact component.The utility model reasonable and compact in structure, by by the utility model modularized design, left soft contact component is respectively arranged in the left and right ends of joint body, right soft contact component, the problem of pressure bearing and seal function after can effectively solve the problem that jointing in current routine work method and not having perforation, when in use, the threading work of elaborate is not needed to carry out again, button, which need to only be rotated, can be connected to the utility model equally between modular pipette tips and perforating gun, quickly form novel modularized cable multi-stage perforator tubing string, it is simple in structure, convenience and high-efficiency, it is time saving and energy saving.
Description
Technical field
The utility model is related to the technical fields of perforation gun joint, are a kind of modularization pulley connectors.
Background technology
In the cable multi-stage perforator operation of horizontal well, meeting one cable multi-stage perforator tubing string of tripping in well passes through water
Power pump push, after cable multi-stage perforator tubing string is transported to specified interval, surface power supply, the connector of perforating gun will pass under electric current,
Perforating gun is enable to be ignited ignition, and then realizes that classification excites branched perforating gun, realizes efficient perforating job, perforation gun joint is made
For it is a kind of on cable multi-stage perforator tubing string connect perforating gun device, at present the perforation gun joint in routine work method be free of
Pressure bearing and seal function after perforation can only connect one to two perforation gun joints and assembling on every cable multi-stage perforator tubing string
Process is complicated, needs individually to thread, it has not been convenient to use.
Invention content
The utility model provides a kind of modularization pulley connector, overcomes the deficiency of the above-mentioned prior art, can be effective
It solves
The perforation gun joint in routine work method does not have the problem of pressure bearing and seal function after perforation at present, and can
It is complicated effectively to solve existing perforating gun assembling process, needs individually to thread, it has not been convenient to the problem of using.
The technical solution of the utility model is realized by following measures：A kind of modularization pulley connector includes connector
Ontology, left soft contact component, right soft contact component, joint body are in the form of a column, are respectively arranged in the left and right ends of joint body
First mounting groove and the second mounting groove are provided with center in the joint body between the first mounting groove and the second mounting groove and lead to
Road, the left and right ends of central passage connect respectively with the first mounting groove, the second mounting groove, and left soft contact component is arranged on the first peace
In tankage, right soft contact component is arranged in the second mounting groove, during left soft contact component and right soft contact component are by being arranged on
Electric wire in heart channel is electrically connected to each other, and being set in the first mounting groove can be limited to left soft contact component in the first mounting groove
Left tamponade, in the second mounting groove setting right soft contact component can be limited to right tamponade in the second mounting groove, in connector
Axial trough is worn in the circumferential direction at least provided with two on the outer wall of ontology, on the two neighboring joint body worn between axial trough
The pulley mounting groove connected with wearing axial trough is provided with, pulley assembly is all installed in pulley mounting groove.
Here is the further optimization and/or improvements to above-mentioned utility model technical solution：
Above-mentioned left soft contact component includes outer sleeve, insulation inner sleeve, and outer sleeve is arranged in the first mounting groove, in insulation
Sleeve is arranged in outer sleeve, and the left and right ends in insulation inner sleeve are respectively arranged with the first contact and the second contact, and first
Contact includes the first mandril, the first limited post, and the right end of the first mandril is integrally fixed on the first limited post, and the second contact includes
Second mandril, the second limited post, the left end of the second mandril are integrally fixed on the second limited post, are limited in the first limited post and second
Spring is provided between the column of position, the left and right ends of spring are fixedly connected respectively with the first limited post, the second limited post, and insulate inner sleeve
The insulation cushion cover that can block insulation inner sleeve left side is provided in the outer sleeve in cylinder left side, in the outer sleeve on the left of the cushion cover that insulate
The baffle ring of insulation cushion cover can be limited by being provided with, and the left end of the first mandril passes through the overhanging outside to outer sleeve of insulation cushion cover, and second
Be provided on insulation inner sleeve inner wall on the right side of limited post with the corresponding shoulder of the second limited post, it is outer on the right side of the second mandril
High pressure sealing contact pin assembly is installed in sleeve, thimble, the left end top pressure of thimble are provided on high pressure sealing contact pin assembly
In the right end of the second mandril, left soft contact component is identical with right soft contact modular construction and left soft contact component soft is touched with right
Point component is distributed in mirror image, the left and right ends of electric wire respectively with the high pressure sealing contact pin assembly, right soft tactile in left soft contact component
High pressure sealing contact pin assembly electrical connection in point component.
Above-mentioned pulley assembly includes pulley, shaft, and pulley is arranged in pulley mounting groove, and shaft is by wearing axial trough by pulley
It is limited in pulley mounting groove, the outer end face of joint body is protruded outside the top of pulley, in pulley mounting groove and wear between axial trough
Joint body on be both provided with screw hole, be provided in screw hole can by the fixed holding screw of shaft, be provided in shaft with tightly
Determine the corresponding screw grooves of screw, holding screw top pressure is in screw grooves.
Above-mentioned first mounting groove is identical with the second installation slot structure and the first mounting groove and the second mounting groove are in mirror image
Distribution, the tamponade mounting groove of the first mounting groove including outside and the outer sleeve mounting groove of inside, the right end of tamponade mounting groove with it is outer
The left end of sleeve mounting groove is interconnected, and tamponade is threadably secured in tamponade mounting groove, the right side setting of outer sleeve
In outer sleeve mounting groove, the left side of outer sleeve passes through the outside that tamponade is extended to outside tamponade, is set in the outer right wall of outer sleeve
There is the limited ring dais of evagination, the medial roof of left tamponade is pressed on limited ring dais.
Above-mentioned first mandril and the second mandril are copper bar, the first limited post and the second limited post be copper post or/and, pulley
For brass pulley.
Between above-mentioned limited ring dais and outer sleeve mounting groove at least provided with the first sealing ring together or/and, joint body
Left and right ends be both provided with external thread section, on the joint body outer wall of external thread section end all at least provided with together second
Sealing ring.
The utility model reasonable and compact in structure, by by the utility model modularized design, in the left and right of joint body
Both ends are respectively arranged with left soft contact component, right soft contact component, and two-stage Seal Design, energy can be formed in the utility model
It is enough effectively to solve the problems, such as that jointing does not have the pressure bearing and seal function after perforation in current routine work method, when in use,
Do not need to carry out the threading work of elaborate again, need to only rotate button the utility model can be connected to it is similary modular
Between pipette tips and perforating gun, novel modularized cable multi-stage perforator tubing string is quickly formed, it is simple in structure, convenience and high-efficiency, time saving
It is laborsaving.
Description of the drawings
Attached drawing 1 is the main view broken section structure diagram of the best embodiment of the utility model.
Attached drawing 2 for structure shown in attached drawing 1 A to schematic cross-sectional view.
Attached drawing 3 is the structure diagram at shaft visual angle one.
Attached drawing 4 is the structure diagram at shaft visual angle two.
Coding in attached drawing is respectively：Channel centered on 1,2 be electric wire, and 3 be left tamponade, and 4 be right tamponade, and 5 is wear axial trough,
6 be pulley mounting groove, and 7 be outer sleeve, and 8 be insulation inner sleeve, and 9 be the first mandril, and 10 be the first limited post, and 11 be the second top
Bar, 12 be the second limited post, and 13 be spring, and 14 be insulation cushion cover, and 15 be baffle ring, and 16 be shoulder, and 17 is total for high pressure sealing contact pin
Into 18 be thimble, and 19 be pulley, and 20 be shaft, and 21 be holding screw, and 22 be screw grooves, and 23 be tamponade mounting groove, and 24 are limited
Position land, 25 be the first sealing ring, and 26 be the second sealing ring, and 27 be joint body.
Specific embodiment
The utility model is not limited by following embodiments, can technical solution according to the present utility model and actual conditions
Determine specific embodiment.
In the utility model, for ease of description, the description of the relative position relation of each component is according to specification
The Butut mode of attached drawing 1 is described, such as：The position relationship of upper and lower, left and right etc. is the Butut according to Figure of description 1
Direction is come determining.
The utility model is further described with reference to embodiment and attached drawing：
As shown in attached drawing 1,2, which includes joint body 27, left soft contact component, right soft contact group
Part, joint body 27 are in the form of a column, and the first mounting groove and the second mounting groove are respectively arranged in the left and right ends of joint body 27,
Central passage 1, the left and right ends point of central passage 1 are provided in joint body 27 between first mounting groove and the second mounting groove
It is not connected with the first mounting groove, the second mounting groove, left soft contact component is arranged in the first mounting groove, right soft contact component setting
In the second mounting groove, left soft contact component is mutually electrically connected with right soft contact component by the electric wire 2 in centrally disposed channel 1
It connects, the left tamponade 3 that can be limited to left soft contact component in the first mounting groove is set in the first mounting groove, in the second mounting groove
Right soft contact component can be limited to the right tamponade 4 in the second mounting groove by interior setting, at least be set on the outer wall of joint body 27
It puts there are two axial trough 5 is worn in the circumferential direction, axial trough is provided with and wears on the two neighboring joint body 27 worn between axial trough 5
The pulley mounting groove 6 of 5 connections, pulley assembly is all installed in pulley mounting groove 6.
The utility model is modular design, and left soft contact group is respectively arranged in the left and right ends of joint body 27
Part, right soft contact component, can form two-stage Seal Design in the utility model, can effectively solve the problem that current routine work side
Perforation gun joint does not have the problem of pressure bearing and seal function after perforation in method, and central passage 1 is arranged in joint body 27, center
2 left and right ends of electric wire in channel 1 are electrically connected respectively with left soft contact component, right soft contact component, when in use, are not needed to again
The threading work of elaborate is carried out, need to only rotate button can be connected to the utility model similary modular pipette tips with penetrating
Between the rifle of hole, novel modularized cable multi-stage perforator tubing string is quickly formed, it is simple in structure, convenience and high-efficiency, time saving and energy saving, pass through
The pulley assembly being arranged on the outer wall of joint body 27, when can substantially reduce cable multi-stage perforator tubing string in decentralization well
Frictional resistance, lower to after predetermined interval, by surface power supply, the utility model transmits excitation current, perforation of lighting a fire successively, point
Grade excites branched perforating gun, realizes efficient perforating job, until operation is completed.
Above-mentioned modularization pulley connector can be made further optimization and/or improvements according to actual needs：
As shown in attached drawing 1,2, left soft contact component includes outer sleeve 7, insulation inner sleeve 8, and outer sleeve 7 is arranged on the first peace
In tankage, insulation inner sleeve 8 is arranged in outer sleeve 7, and the left and right ends in insulation inner sleeve 8 are respectively arranged with the first contact
With the second contact, the first contact includes the first mandril 9, the first limited post 10, and the right end of the first mandril 9 is integrally fixed on the first limit
On the column 10 of position, the second contact includes the second mandril 11, the second limited post 12, and the left end of the second mandril 11 is integrally fixed on the second limit
On the column 12 of position, be provided with spring 13 between the first limited post 10 and the second limited post 12, the left and right ends of spring 13 respectively with
First limited post 10, the second limited post 12 are fixedly connected, and insulation can be blocked by being provided in the outer sleeve 7 in 8 left side of insulation inner sleeve
The insulation cushion cover 14 of 8 left side of inner sleeve is provided with the gear that can limit the cushion cover 14 that insulate in the outer sleeve 7 in insulation cushion cover 14 left side
Ring 15, the left end of the first mandril 9 pass through the outside that outer sleeve 7 is extended to outside insulation cushion cover 14, the insulation on 12 right side of the second limited post
Be provided on 8 inner wall of inner sleeve with 12 corresponding shoulder 16 of the second limited post, it is solid in the outer sleeve 7 on the right side of the second mandril 11
Dingan County is equipped with high pressure sealing contact pin assembly 17, and thimble 18, the left end top pressure of thimble 18 are provided on high pressure sealing contact pin assembly 17
In the right end of the second mandril 11, left soft contact component is identical with right soft contact modular construction and left soft contact component and the right side are soft
Contact assembly is distributed in mirror image, the left and right ends of electric wire 2 respectively with the high pressure sealing contact pin assembly 17, right in left soft contact component
High pressure sealing contact pin assembly 17 in soft contact component is electrically connected.
First mandril 9, the first limited post 10, the second mandril 11, the second limited post 12, thimble 18, high pressure sealing contact pin are total
A stable conductive path is constituted in joint body 27 in into 17, electric wire 2, the utility model is being connected to same original mold
When on the perforating gun of block, outer the first mandril 9 for stretching out 27 both ends of joint body can be unavoidably squeezed, spring 13 can be pressed at this time
Compression deformation makes the first mandril 9 bounce back in insulation inner sleeve 8, Hard link can effectively be avoided to make 9 flexural deformation of the first mandril in this way
Situation, when connect complete when, under the action of 13 elastic force of spring, the first mandril 9 is restored to overhanging state again, can protect
Demonstrate,prove circuit stable connection, anti-perforation impact property is good, above-mentioned high pressure sealing contact pin assembly 17 be conventionally known technology, the assembly
Can not only meet seal and pressure bearing 120MPa, at the same can also normally circuit, conducting resistance is less than 2 ohm, and insulation resistance is more than
100 megohms, insulation cushion cover 14, insulation inner sleeve 8 are using polymer composite machine-shaping, and heatproof is more than 175 DEG C, can
Because the first mandril 9 is stuck or electronic circuit short circuit or disconnection caused by stretching out during effectivelying prevent perforation impact excessive, play close
The effect of envelope insulation and protection, high pressure sealing contact pin, insulation cushion cover 14, insulation inner sleeve 8 are together in the left and right of joint body 27
Both ends form two-stage sealing, can effectively solve the problem that perforation gun joint does not have the pressure bearing and seal after perforation in current routine work method
The problem of function.
As shown in attached drawing 1,2,3,4, pulley assembly includes pulley 19, shaft 20, and pulley 19 is arranged on pulley mounting groove 6
Interior, pulley 19 is limited in pulley mounting groove 6 by shaft 20 by wearing axial trough 5, and joint body 27 is protruded outside the top of pulley 19
Outer end face, in pulley mounting groove 6 and wear and be both provided with screw hole on joint body 27 between axial trough 5, energy is provided in screw hole
By 20 fixed holding screw 21 of shaft, it is provided with and 21 corresponding screw grooves 22 of holding screw, clamp screw in shaft 20
21 top pressures are followed closely in screw grooves 22.The setting of pulley 19 can reduce frictional resistance of the utility model in well during downlink,
It is not easy that card resistance occurs in well, facilitates and this practical launches is arrived into intended substrate position.
As shown in Figure 1, the first mounting groove is identical with the second installation slot structure and the first mounting groove and second is installed
Slot is distributed in mirror image, and the first mounting groove includes the tamponade mounting groove 23 in outside and the outer sleeve mounting groove of inside, tamponade mounting groove
The left end of 23 right end and outer sleeve mounting groove is interconnected, and tamponade is threadably secured in tamponade mounting groove 23, outside
The right side of sleeve 7 is arranged in outer sleeve mounting groove, and the left side of outer sleeve 7 passes through the outside that tamponade is extended to outside tamponade, outer sleeve 7
Outer right wall on be provided with the limited ring dais 24 of evagination, the medial roof of left tamponade 3 is pressed on limited ring dais 24.Outer sleeve is installed
Stepped and matched with limited ring dais 24 in slot, one end of such outer sleeve 7 is limited land 24 and limits, outer sleeve 7
The other end is limited by left tamponade 3, and outer sleeve 7 firmly can be limited in outer sleeve mounting groove in this way, reduces axial vibrations
Influence to the utility model.
As shown in attached drawing 1,2, the first mandril 9 and the second mandril 11 are copper bar, the first limited post 10 and the second limited post 12
Or/and, pulley 19 is brass pulley 19 for copper post.First mandril 9, the second mandril 11, the first limited post 10, the second limited post
12 generally are fine copper material, are that the utility model has good electric conductivity in this way, and brass is alloyed copper, is had stronger
Wearability suits somebody to a T as processing pulley 19.
As shown in Figure 1, between limited ring dais 24 and outer sleeve mounting groove at least provided with the first sealing ring 25 together,
Or/and the left and right ends of joint body 27 are both provided with external thread section, on 27 outer wall of joint body of external thread section end all
At least provided with the second sealing ring 26 together.Be conducive to the sealing and dismounting of the utility model in this way.
More than technical characteristic constitutes the most preferred embodiment of the utility model, with stronger adaptability and best implementation
Effect can increase and decrease non-essential technical characteristic, to meet the needs of different situations according to actual needs.
Claims (10)
1. a kind of modularization pulley connector, it is characterised in that including joint body, left soft contact component, right soft contact component, connect
Head ontology is in the form of a column, and the first mounting groove and the second mounting groove are respectively arranged in the left and right ends of joint body, in the first installation
Central passage is provided in joint body between slot and the second mounting groove, the left and right ends of central passage are installed respectively with first
Slot, the connection of the second mounting groove, left soft contact component are arranged in the first mounting groove, and right soft contact component is arranged on the second mounting groove
Interior, left soft contact component is electrically connected to each other with right soft contact component by the electric wire in centrally disposed channel, in the first installation
Left soft contact component can be limited to the left tamponade in the first mounting groove by setting in slot, and setting can will be right soft in the second mounting groove
Contact assembly is limited to the right tamponade in the second mounting groove, on the outer wall of joint body at least provided with two along the circumferential direction
Wear axial trough, the pulley mounting groove connected with wearing axial trough is provided on the two neighboring joint body worn between axial trough, in cunning
Pulley assembly is all installed in wheel mounting groove.
2. modularization pulley connector according to claim 1, it is characterised in that left soft contact component includes outer sleeve, insulation
Inner sleeve, outer sleeve are arranged in the first mounting groove, and insulation inner sleeve is arranged in outer sleeve, the left and right in insulation inner sleeve
Both ends are respectively arranged with the first contact and the second contact, and the first contact includes the first mandril, the first limited post, the right side of the first mandril
End is integrally fixed on the first limited post, and the second contact includes the second mandril, the second limited post, and the left end of the second mandril is integrally solid
Be scheduled on the second limited post, be provided with spring between the first limited post and the second limited post, the left and right ends of spring respectively with
First limited post, the second limited post are fixedly connected, and insulation inner sleeve can be blocked by being provided in the outer sleeve on the left of the inner sleeve that insulate
The insulation cushion cover of left side, insulate cushion cover on the left of outer sleeve in be provided with can limit insulate cushion cover baffle ring, the first mandril
Left end passes through the insulation cushion cover overhanging outside to outer sleeve, is provided on the insulation inner sleeve inner wall on the right side of the second limited post and the
The corresponding shoulder of two limited posts is installed with high pressure sealing contact pin assembly, high pressure in the outer sleeve on the right side of the second mandril
Thimble is provided on sealing contact pin assembly, and in the right end of the second mandril, left soft contact component soft touches with right for the left end top pressure of thimble
Point modular construction is identical and left soft contact component and right soft contact component are in mirror image distribution, the left and right ends of electric wire respectively with
High pressure sealing contact pin assembly electrical connection in high pressure sealing contact pin assembly, right soft contact component in left soft contact component.
3. modularization pulley connector according to claim 1 or 2, it is characterised in that pulley assembly includes pulley, shaft, sliding
Wheel is arranged in pulley mounting groove, and pulley is limited in pulley mounting groove by shaft by wearing axial trough, is protruded outside the top of pulley
The outer end face of joint body in pulley mounting groove and is worn screw hole is both provided on joint body between axial trough, set in screw hole
Have and shaft fixed holding screw can be provided with and the corresponding screw grooves of holding screw, holding screw top pressure in shaft
In screw grooves.
4. modularization pulley connector according to claim 1 or 2, it is characterised in that the first mounting groove and the second mounting groove knot
Structure is identical and the first mounting groove and the second mounting groove are distributed in mirror image, the first mounting groove include the tamponade mounting groove in outside with
The outer sleeve mounting groove of inside, the left end of the right end and outer sleeve mounting groove of tamponade mounting groove are interconnected, and tamponade passes through screw thread
It is fixedly mounted in tamponade mounting groove, is arranged on the right side of outer sleeve in outer sleeve mounting groove, the left side of outer sleeve passes through tamponade
The outside of tamponade is extended to outside, the limited ring dais of evagination is provided in the outer right wall of outer sleeve, and the medial roof of left tamponade is pressed in limit
In the land of position.
5. modularization pulley connector according to claim 3, it is characterised in that the first mounting groove and the second installation slot structure
Identical and the first mounting groove and the second mounting groove are distributed in mirror image, the first mounting groove include the tamponade mounting groove in outside with it is interior
The outer sleeve mounting groove of side, the left end of the right end and outer sleeve mounting groove of tamponade mounting groove are interconnected, and tamponade is consolidated by screw thread
Dingan County is arranged in outer sleeve mounting groove in tamponade mounting groove on the right side of outer sleeve, and the left side of outer sleeve is passed through outside tamponade
The outside of tamponade is extended to, the limited ring dais of evagination is provided in the outer right wall of outer sleeve, the medial roof of left tamponade is pressed in limiting
In land.
6. modularization pulley connector according to claim 3, it is characterised in that the first mandril and the second mandril are copper bar, the
One limited post and the second limited post for copper post or/and, pulley is brass pulley.
7. modularization pulley connector according to claim 4, it is characterised in that the first mandril and the second mandril are copper bar, the
One limited post and the second limited post for copper post or/and, pulley is brass pulley.
8. the modularization pulley connector according to claim 2 or 5, it is characterised in that the first mandril and the second mandril are copper
Bar, the first limited post and the second limited post are copper post.
9. the modularization pulley connector according to claim or 5 or 7, it is characterised in that limited ring dais and outer sleeve mounting groove
Between at least provided with together the first sealing ring or/and, the left and right ends of joint body are both provided with external thread section, in outer spiral shell
All at least provided with the second sealing ring together on the joint body outer wall of line section end.
10. modularization pulley connector according to claim 8, it is characterised in that between limited ring dais and outer sleeve mounting groove
At least provided with together the first sealing ring or/and, the left and right ends of joint body are both provided with external thread section, in external thread section
All at least provided with the second sealing ring together on the joint body outer wall of end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260059.XU CN207526481U (en) | 2017-09-28 | 2017-09-28 | Modularization pulley connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260059.XU CN207526481U (en) | 2017-09-28 | 2017-09-28 | Modularization pulley connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207526481U true CN207526481U (en) | 2018-06-22 |
Family
ID=62569974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721260059.XU Active CN207526481U (en) | 2017-09-28 | 2017-09-28 | Modularization pulley connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207526481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999598A (en) * | 2018-09-29 | 2018-12-14 | 西安物华巨能爆破器材有限责任公司 | A kind of perforating oil gas well electric igniter |
-
2017
- 2017-09-28 CN CN201721260059.XU patent/CN207526481U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999598A (en) * | 2018-09-29 | 2018-12-14 | 西安物华巨能爆破器材有限责任公司 | A kind of perforating oil gas well electric igniter |
| CN108999598B (en) * | 2018-09-29 | 2023-10-31 | 物华能源科技有限公司 | Electric igniter for perforation of oil and gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190816 Address after: 100120 Liupu Kang, Xicheng District, Beijing Co-patentee after: China National Petroleum Group Logging Co., Ltd. Patentee after: China Petroleum and Natural Gas Group Co., Ltd. Address before: 834000 Yujiannan Road 217 Logging Company, Karamay City, Xinjiang Uygur Autonomous Region Patentee before: CNPC Xibu Drilling Engineering Company Limited |
|
| TR01 | Transfer of patent right |