CN2485422Y - High energy composite hole shooter with external explosive load - Google Patents
High energy composite hole shooter with external explosive load Download PDFInfo
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- CN2485422Y CN2485422Y CN 01212981 CN01212981U CN2485422Y CN 2485422 Y CN2485422 Y CN 2485422Y CN 01212981 CN01212981 CN 01212981 CN 01212981 U CN01212981 U CN 01212981U CN 2485422 Y CN2485422 Y CN 2485422Y
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- gun
- perforating
- hole
- perforating gun
- bullet
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Abstract
The utility model relates to a high energy composite hole shooter for the oil well of the charging device, which comprises one or multi perforating guns, a gun head positioned on the upper end of the top perforating gun, a gun tail positioned on the lower end of the last perforating gun, and an igniter positioned on the inside of the gun head or the outside of the gun head. The perforating gun is that: the inside of the perforating gun body is provided with a gun carrier, and the inside of the gun carrier is provided with a magazine, and the inside of the magazine is filled with the perforating charge, and the solid high energy fuel is arranged between one magazine and the neighboring magazine, and one igniting wire is connected with each perforating charge. A positioning device is arranged between the upper and lower end of the gun carrier and the perforating gun body, which can make the gun carrier not rotate and axially move in respect to the perforating gun body.
Description
The utility model belongs to producing oil, gas, water from well; Solubilized can be dissolved the method or the equipment of material or mineral, is specifically related to shaped-charge perforator.
The patent No. is 97242235.8, denomination of invention is the Chinese utility model patent of " the close dual-jet perforating system in the high hole of the compound malleation of oil gas well high-energy ", adopt a cylinder grain or solid propellant post, the different length out of phase of stick or solid propellant post is provided with and plays the hole, cave, there is the detonating fuse hole of interspersed detonating fuse at the center, and perforating bullet is installed in and plays in the hole, cave.This stick or solid propellant post are difficult to realize on manufacturing process, and increased substantially cost of production, in the on-the-spot underground work process in oil field, need intercept the composite solidpropellant post at the scene, adjust explosive payload, therefore reduce the construction operation operating efficiency, increased site safety hidden danger.
The sealing of above-mentioned patent pressure release through hole on perforating gun is by a round steel sheet, cover one deck rubber above and constitute the sealing blanking cover, be embedded in that the pressure release through hole realizes sealing, because oil gas well depth difference, pressure changes greatly, and the round steel sheet is easy to distortion, loses sealing effectiveness, allow water to flow in the perforating gun, cause detonating fuse to put out quick-fried or other dangerous accident occurs.
Detent mechanism between above-mentioned patent firing mount and the perforating gun can only make firing mount radially locate in perforating gun, can not axial location, have influence on propagation of explosion, and blind hole on perforating bullet and the perforating gun or the accurately contraposition of pressure release through hole, the jet that perforating bullet detonation gas produces is penetrated partially, has influence on perforating quality and pressure break and makes the seam effect.
The interior detonating fuse of coupling head of above-mentioned patent one joint perforating gun and an adjacent joint perforating gun be peripherally equipped with the centralizer of making by elastomeric material, in assembling process, centralizer is often deviate from mounting groove, detonating fuse in last coupling head and the second line of a couplet joint can not accurately be located, and has influence on the reliability of propagation of explosion.
The purpose of this utility model is to overcome the shortcoming of above-mentioned patent, provides that a kind of design is more reasonable, easy to assembly, safe and reliable, oil reservoir location perforation makes the external oil gas well high-energy composite gun perforation device of seam powder charge effective, that cost is low.
For achieving the above object, the solution that the utility model adopts is: it comprises a joint or more piece perforating gun, be arranged on the rifle head of going up a joint perforating gun upper end most, be arranged on the gun breech of next joint perforating gun lower end.It also comprises and is arranged in the rifle head or apparatus to cause bursting that the rifle head is outer.Above-mentioned perforating gun is: the magazine that perforating bullet is housed is set in the firing mount in perforating gun, be provided with solid high-energy fuel between a magazine and the adjacent magazine, a detonating fuse links to each other with each perforating bullet, is provided with detent mechanism between the two ends up and down of firing mount and perforating gun.
More piece perforating gun of the present utility model is: the second line of a couplet joint that the detonator that is connected with detonating fuse is housed in a top joint perforating gun lower end is provided with, below the last coupling head of the detonator that is connected with detonating fuse being housed in being provided with of an adjacent joint perforating gun upper end, above a joint perforating gun and following adjacent save perforating gun and link by last coupling head and second line of a couplet joint.
The same axial length of the utility model perforating gun radially is provided with a blind hole and a pressure release through hole reverse with blind hole, adjacent blind hole and the pressure release through hole of different axial length outs of phase is staggered by same direction of rotation, is stamped the sealing blanking cover on the pressure release through hole.Firing mount of the present utility model is: the same axial length at a tubular body radially is provided with a pair of about the symmetrical hole, bullet cave of symmetrical centre axis, adjacent two of different axial length outs of phase play that the holes, cave are staggered and corresponding one by one with blind hole or pressure release through hole on the perforating gun, and sidewall is provided with the firing mount locating hole at the two ends of tubular body.
Sealing blanking cover on the utility model perforating gun pressure release through hole is the arch blanking cover.
Arch blanking cover of the present utility model is: the rubber gasket that at the upper surface connection taper seat angle α of an arch round steel sheet is 15 °～45 °.
Sealing blanking cover of the present utility model also can for: in upper surface processing or to be manufactured with undercut ss be that the upper surface of 30 °～60 ° of round steel sheets is provided with rubber gasket, the taper seat angle α of this rubber gasket is 15 °～45 °.
Be provided with 10～20 magazines in the firing mount in 1 meter long shot hole body of a gun of the present utility model, be provided with perforating bullet in the magazine, hole, bullet cave on the oral area of each perforating bullet and the firing mount and with perforating gun on the corresponding one by one arrangement of blind hole, the hole, bullet cave on the afterbody of each perforating bullet and the firing mount and with perforating gun on the corresponding one by one arrangement of pressure release through hole.
Solid high-energy fuel of the present utility model is composite solidpropellant sheet or composite solidpropellant post, composite solidpropellant sheet or composite solidpropellant post axially be provided with the detonating fuse hole, detonating fuse is arranged in the detonating fuse hole, overlaps with the perforating bullet afterbody.
Detent mechanism of the present utility model comprises: be arranged on the locating ring that is fixedly connected by connector and firing mount between interior two ends of perforating gun and the firing mount, and an end is fixed on the locating ring, the other end is arranged on the connector in the body of a gun locating slot in the perforating gun.
The utility model is compared with 97242235.8 Chinese patents, change a through hole in two pressure release through holes of same axial length on the perforating gun into blind hole, the circular steel disc of the blanking cover that is covered on the pressure release through hole changes the round steel sheet of arch round steel sheet or band lead angle into, at arch round steel sheet upper surface vulcanized rubber pad or at the round steel sheet upper surface vulcanized rubber pad of being with lead angle, make perforating gun better seal be arranged in the down-hole.The detent mechanism at firing mount two ends makes that firing mount can be axially in perforating gun and radial location, guaranteed that perforating bullet is corresponding one by one with blind hole and pressure release through hole on the perforating gun, and the reliability of detonating fuse propagation of explosion, perforating bullet is arranged on the composite solidpropellant post, change perforating bullet into and be arranged in the magazine, be provided with solid high-energy fuel between magazine and the magazine.Solved the adjustment problem of high-energy fuel amount in the manufacturing process problem of solid propellant post and the on-the-spot use.Therefore, the utlity model has reasonable in design, compact conformation, easy to assembly, safe and reliable, perforation and make advantages such as seam is effective, can in underground mining oil, gas, extensively promote the use of.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the structural representation of a joint perforating gun among Fig. 1.
Fig. 3 is the structural representation of firing mount among Fig. 2.
Fig. 4 is the structural representation of sealing blanking cover among Fig. 2.
Fig. 5 is the structural representation of locating ring 18 among Fig. 2.
Fig. 6 is the structural representation that the 4th embodiment of the utility model seals blanking cover.
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Fig. 1～5 have provided the structural representation of first embodiment of the utility model.
At Fig. 1, in 2, present embodiment by 1 meter long two joint perforating guns 1, rifle head 2, cap sensitive device 3, rubber seal 4, go up coupling head 5, second line of a couplet joint 6, gun breech 7, detonator 8 and connect and constitute, cap sensitive device 3 is an embodiment of apparatus to cause bursting.Topmost the upper end of a joint perforating gun 1 connects with rifle head 2, second line of a couplet joint 6 is passed through in the lower end and last coupling head 5 connects with the upper end of a following joint perforating gun 1, rubber seal 4 is installed between coupling head 5 and second line of a couplet joint 6 and rifle head 2 and the perforating gun 1, the lower end of a bottom joint perforating gun 1 connects with gun breech 7, cap sensitive device 3 is housed in rifle head 2, be connected with ground power supply by cable, in last coupling head 5 and second line of a couplet joint 6, detonator 8 be housed.Two joint perforating guns 1 of present embodiment also can be different lengths.Present embodiment also can be selected a joint perforating gun 1 of 2 meters long for use, connects with rifle head 2 in upper end of this joint perforating gun 1, the lower end connects with gun breech 7.A joint perforating gun 1 of the present utility model has plurality of specifications in 0.5～4 meter length range, in production practices according to core intersection, can in the perforating gun 1 of plurality of specifications, choose arbitrarily, use coupling head 5 and second line of a couplet joint 6 links up, connect with rifle head 2 in the upper end of a joint perforating gun 1 topmost, next lower end of saving perforating gun 1 connects with gun breech 7.Thick as 10.5 meters in oil reservoir, can select 4 meters long two joint perforating guns 1 and a joint perforating gun 1 another specific embodiment of assembly cost utility model of 2.5 meters long for use.8 meters in top for another example oil reservoir is thick, 7 meters in following oil reservoir is thick, the thickness of no oil reservoir is 5 meters between the oil reservoir up and down, can in the perforating gun 1 of plurality of specifications, choose arbitrarily in the thickness range of oil reservoir up and down, use coupling head 5 and second line of a couplet joint 6 links up, middle no oil reservoir can connect interlayer gun and be implemented in payzone perforating and fracturing purpose.
Fig. 2 has provided the structural representation of present embodiment one joint perforating gun 1.In Fig. 1,2, one joint perforating gun 1 of present embodiment is made of perforating gun 9, firing mount 10, magazine 11, bullet cover 12, perforating bullet 13, composite solidpropellant sheet 14, detonating fuse 15, arch round steel sheet 16, rubber gasket 17, locating ring 18, screw 19 connections, and arch round steel sheet 16, rubber gasket 17 are connected into the sealing blanking cover of present embodiment.Locating ring 18, screw 19 are connected into the detent mechanism of present embodiment.
The same axial length of perforating gun 9 radially be processed with a blind hole 2 ' and one with the pressure release through hole 1 of blind hole 2 ' reverse ', pressure release through hole 1 ' be used for pressure release, the different axial length outs of phase of 1 meter long perforating gun 9 of present embodiment be processed with 16 blind holes 2 ' and 16 pressure release through holes 1 ', a blind hole 2 of different axial length outs of phase ' with an adjacent blind hole 2 ' be staggered by same direction of rotation, its phase angle is 90 °.Pressure release through hole 1 ' on be stamped the sealing blanking cover, the sealing blanking cover of present embodiment is that sulfuration has rubber gasket 17 to constitute on arch round steel sheet 16, the taper seat angle α of rubber gasket 17 is 30 °.
16 magazines 11 are installed in firing mount 10, magazine 11 radially with the magazine 11 bullet cover 12 that has been connected as a single entity, perforating bullet 13 is installed in the bullet cover 12, the oral area of perforating bullet 13 face blind hole 2 on the perforating gun 9 ', afterbody faces on the perforating gun 9 with blind hole 2 ' same axial length on corresponding pressure release through hole 1 '.Between magazine 11 and magazine 11, be placed with composite solidpropellant sheet 14, also the composite solidpropellant post can be installed.Have at the center of composite solidpropellant sheet 14 detonating fuse hole 3 ', detonating fuse 15 penetrate the detonating fuse hole 3 of each composite solidpropellant sheet 14 ' in, with the fixing card 13-1 that is fixed on perforating bullet 13 afterbodys detonating fuse 15 is fixed on perforating bullet 13 afterbodys, because the utility model adopts between magazine 11 and the magazine 11 composite solidpropellant sheet 14 is installed, solved the problem of the composite solidpropellant post of making 0.5～4 meter long from technology, guarantee the explosive payload of composite solidpropellant, improved the fracturing effect of oil reservoir.With the utility model in the downhole perforation pressure break, when the thickness of oil reservoir total length less than a few joint perforating guns 1, when no oil reservoir location does not need perforating and fracturing, can in perforating gun 1, adorn several magazines 11 and composite solidpropellant sheet 14 less, concrete numeral should be determined according to the thickness in no oil reservoir location, has solved a difficult problem of cutting one section composite solidpropellant post at the construction field (site) from technology.
Between the two ends of firing mount 10 and perforating gun 9, a detent mechanism is installed respectively.The detent mechanism of present embodiment is made of locating ring 18, screw 19 connections.The sidewall of locating ring 18 radially be processed with 2 locating ring locating holes 7 ', locating ring locating hole 7 ' be screw, with screw penetrate firing mount locating hole 5 ' in, be screwed into again locating ring locating hole 7 ' in, locating ring 18 can not be relative to radially rotating with firing mount 10, the locating ring anchor ring be processed with screw 8 ', tilting screw 19 be screwed into screw 8 on the setting circle anchor ring ' in.The other end just in time enter the body of a gun locating slot 4 of perforating gun 9 ' in, make firing mount 10 and perforating gun 9 not to move to axial.Because present embodiment adopted above-mentioned detent mechanism, firing mount 10 can not radially rotate and move axially with respect to perforating gun 9, has guaranteed the secure loading operation and in the reliability of underground work.
The designer has provided second embodiment of the utility model.In the present embodiment, 1 meter long perforating gun, 9 different axial length outs of phase be processed with 10 blind holes 2 ' and 10 with the pressure release through hole 1 of blind hole 2 ' reverse ', blind hole 2 of different axial lengths ' with an adjacent blind hole 2 ' or pressure release through hole 1 ' be staggered by same direction of rotation, its phase angle is 90 °, pressure release through hole 1 ' on be stamped the sealing blanking cover, be bonded with rubber gasket 17 above the arch round steel sheet 16 of sealing blanking cover, the taper seat angle α of rubber gasket 17 is 15 °.Hole, bullet cave 6 in the perforating gun 9 on the firing mounts 10 ' with perforating gun 9 on blind hole 2 ' or pressure release through hole 1 ' corresponding.10 magazines 11 are installed in firing mount 10, and the connecting relation of other component and component is identical with first embodiment.
The designer has provided the 3rd embodiment of the utility model.In the present embodiment, the same axial length of perforating gun 9 be processed with a blind hole 2 ' and one with the pressure release through hole 1 of blind hole 2 ' reverse ', 1 meter long perforating gun, 9 different axial length outs of phase be processed with 20 blind holes 2 ' and 20 with the pressure release through hole 1 of blind hole 2 ' reverse ', blind hole 2 of different axial lengths ' with an adjacent blind hole 2 ' or pressure release through hole 1 ' be staggered, its phase angle is 90 °, pressure release through hole 1 ' on be stamped the sealing blanking cover, be bonded with rubber gasket 17 above the arch round steel sheet 16 of sealing blanking cover, the taper seat angle α of rubber gasket 17 is 45 °.Hole, bullet cave 6 in the perforating gun 9 on the firing mounts 10 ' with perforating gun 9 on blind hole 2 ' or pressure release through hole 1 ' corresponding.20 magazines 11 are installed in firing mount 10, and the connecting relation of other component and component is identical with first embodiment.
The designer has provided the 4th embodiment of the utility model.In Fig. 2,6, perforating gun 9 pressure release through holes 1 ' on the sealing blanking cover that covered be to connect by round steel sheet 20 and rubber gasket 21 to constitute, the undercut ss of round steel sheet 20 upper surfaces is 30 °, sulfuration has rubber gasket 21 on round steel sheet 20, rubber gasket 17 among the shape of rubber gasket 21 and first embodiment or second embodiment or the 3rd embodiment is identical, and the connecting relation of other component and component is identical with first embodiment.
The designer has provided the 5th embodiment of the utility model.In the present embodiment, the undercut ss of round steel sheet 20 upper surfaces of sealing blanking cover is 60 °, sulfuration has rubber gasket 21 on round steel sheet 20, rubber gasket 17 among the shape of rubber gasket 21 and first embodiment or second embodiment or the 3rd embodiment is identical, and the connecting relation of other component and component is identical with first embodiment.
The designer has provided the 6th embodiment of the utility model.In the present embodiment, the undercut ss of round steel sheet 20 upper surfaces of sealing blanking cover is 45 °, sulfuration has rubber gasket 21 on round steel sheet 20, rubber gasket 17 among the shape of rubber gasket 21 and first embodiment or second embodiment or the 3rd embodiment is identical, and the connecting relation of other component and component is identical with first embodiment.
According to above-mentioned principle, also can design the external oil gas well high-energy composite gun perforation device of powder charge of another concrete structure.
Claims (9)
1. oil gas well high-energy composite gun perforation device that powder charge is external, it comprises a joint or a more piece perforating gun [1], be arranged on the rifle head [2] of going up joint perforating gun [a 1] upper end most, be arranged on the gun breech [7] of next joint perforating gun [1] lower end, it also comprises and is arranged in the rifle head [2] or apparatus to cause bursting that rifle head [2] is outer, it is characterized in that above-mentioned perforating gun [1] is: be provided with in the firing mount [10] in perforating gun [9] magazine [11] of perforating bullet [13] is housed, be provided with solid high-energy fuel between a magazine [11] and the adjacent magazine [11], a detonating fuse [15] links to each other with each perforating bullet [13], is provided with detent mechanism between the two ends up and down of firing mount [10] and perforating gun [9].
2. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 1, it is characterized in that said more piece perforating gun [1] is: the second line of a couplet joint [6] that the detonator [8] that is connected with detonating fuse [15] is housed in top joint perforating gun [a 1] lower end is provided with, below the last coupling head [5] of the detonator [8] that is connected with detonating fuse [15] being housed in being provided with of adjacent joint perforating gun [a 1] upper end, above a joint perforating gun [1] and following adjacent save perforating gun [1] and link by last coupling head [5] and second line of a couplet joint [6].
3. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 1, it is characterized in that: the same axial length of said perforating gun [9] radially is provided with a blind hole [2 '] and a pressure release through hole [1 '] reverse with blind hole [2 '], adjacent blind hole [2 '] and the pressure release through hole [1 '] of different axial length outs of phase is staggered by same direction of rotation, is stamped the sealing blanking cover on pressure release through hole [1 ']; Said firing mount [10] is: the same axial length at a tubular body radially is provided with a pair of about the symmetrical hole, bullet cave [6 '] of symmetrical centre axis, adjacent two of different axial length outs of phase play that holes, cave [6 '] are staggered and corresponding one by one with blind hole [2 '] or pressure release through hole [1 '] on the perforating gun [9], are provided with firing mount locating hole [5 '] at the two ends of tubular body sidewall.
4. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 3, it is characterized in that: the sealing blanking cover on said perforating gun [9] the pressure release through hole [1 '] is the arch blanking cover.
5. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 4, it is characterized in that: said arch blanking cover is: the rubber gasket [17] that at the upper surface connection taper seat angle α of an arch round steel sheet [16] is 15 °～45 °.
6. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 4, it is characterized in that said sealing blanking cover also can for: in upper surface processing or to be manufactured with undercut ss be that the upper surface of 30 °～60 ° round steel sheets [20] is provided with rubber gasket [21], the taper seat angle α of this rubber gasket [21] is 15 °～45 °.
7. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 1, it is characterized in that being provided with 10～20 magazines [11] in the firing mount [10] in said 1 meter long shot hole body of a gun [9], be provided with perforating bullet [13] in the magazine [11], hole, bullet cave [6 '] on the oral area of each perforating bullet [13] and the firing mount [10] and with perforating gun [9] on the corresponding one by one arrangement of blind hole [2 '], the hole, bullet cave [6 '] on the afterbody of each perforating bullet [13] and the firing mount [10] and with perforating gun [9] on the corresponding one by one arrangement of pressure release through hole [1 '].
8. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 1, it is characterized in that: said solid high-energy fuel is composite solidpropellant sheet [14] or composite solidpropellant post, axially be provided with detonating fuse hole [3 '] at composite solidpropellant sheet [14] or composite solidpropellant post, detonating fuse [15] is arranged in the detonating fuse hole [3 '], overlaps with perforating bullet [13] afterbody.
9. according to the external oil gas well high-energy composite gun perforation device of the described powder charge of claim 1, it is characterized in that said detent mechanism comprises: be arranged on the locating ring [8] that is fixedly connected by connector and firing mount [10] between interior two ends of perforating gun [9] and the firing mount [10], and an end is fixed on, and locating ring [18] is gone up, the other end is arranged on the connector in the interior body of a gun locating slot of perforating gun [9] [4 '].
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212981 CN2485422Y (en) | 2001-02-06 | 2001-02-06 | High energy composite hole shooter with external explosive load |
| CA002446888A CA2446888C (en) | 2001-02-06 | 2002-02-06 | A high-energy combined well perforating device |
| US10/467,231 US6991044B2 (en) | 2001-02-06 | 2002-02-06 | High-energy combined well perforating device |
| PCT/CN2002/000068 WO2002063133A1 (en) | 2001-02-06 | 2002-02-06 | A well perforating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212981 CN2485422Y (en) | 2001-02-06 | 2001-02-06 | High energy composite hole shooter with external explosive load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2485422Y true CN2485422Y (en) | 2002-04-10 |
Family
ID=33632061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01212981 Expired - Fee Related CN2485422Y (en) | 2001-02-06 | 2001-02-06 | High energy composite hole shooter with external explosive load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2485422Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007031001A1 (en) * | 2005-09-15 | 2007-03-22 | Xi'an Tongyuan Petrotech Co., Ltd. | Compound perforator without body |
| CN111958847A (en) * | 2020-08-24 | 2020-11-20 | 山东理工大学 | Detachable annular energy gathering cutter and use method thereof |
| CN117365419A (en) * | 2023-12-05 | 2024-01-09 | 大庆金祥寓科技有限公司 | Full non-explosive energy release blocking remover |
-
2001
- 2001-02-06 CN CN 01212981 patent/CN2485422Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007031001A1 (en) * | 2005-09-15 | 2007-03-22 | Xi'an Tongyuan Petrotech Co., Ltd. | Compound perforator without body |
| CN111958847A (en) * | 2020-08-24 | 2020-11-20 | 山东理工大学 | Detachable annular energy gathering cutter and use method thereof |
| CN111958847B (en) * | 2020-08-24 | 2022-04-01 | 山东理工大学 | Detachable annular energy gathering cutter and use method thereof |
| CN117365419A (en) * | 2023-12-05 | 2024-01-09 | 大庆金祥寓科技有限公司 | Full non-explosive energy release blocking remover |
| CN117365419B (en) * | 2023-12-05 | 2024-02-27 | 大庆金祥寓科技有限公司 | Full non-explosive energy release blocking remover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XI AN TONGYUAN PETROLEUM TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: TONGYAN SCIENCE + TECHNOLOGY INDUSTRIAL CO., LTD., XI AN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Xi'an Tong Yuan petroleum Polytron Technologies Inc Patentee before: Tongyuan Science & Technology Industrial Co., Ltd., Xi'an City |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |