CN202165038U - Tool for fault treatment of underground safety valve - Google Patents
Tool for fault treatment of underground safety valve Download PDFInfo
- Publication number
- CN202165038U CN202165038U CN2011202402203U CN201120240220U CN202165038U CN 202165038 U CN202165038 U CN 202165038U CN 2011202402203 U CN2011202402203 U CN 2011202402203U CN 201120240220 U CN201120240220 U CN 201120240220U CN 202165038 U CN202165038 U CN 202165038U
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Abstract
The utility model discloses a tool for fault treatment of an underground safety valve, which comprises a locking sealing device, a build-in type safety valve and a punching tool. The tool for fault treatment of the underground safety valve is a set of opening tool capable of removing faults of the underground safety valve through ground operation. Once the underground safety valve can not be opened, the tool can operate on the ground, perform maintenance on underground safety valves with faults, provide channels for oil gas fluid and enable oil gas wells to resume production under the condition that pipe columns are not removed. The tool for fault treatment of the underground safety valve further has the advantages of being safe, reliable and convenient to use.
Description
Technical field
The utility model belongs to the oil gas well and bores completion field, particularly a kind of instrument that is used for the storm valve troubleshooting.
Background technology
In oil exploration industry, but often occur that to cause the hydrocarbon fluid flow velocity to strengthen uncontrollable owing to reasons such as mining equipment break down when carrying out underground work, at this moment timely closing passage is just guaranteed job safety, avoids taking place bigger accident.In the actual production, must there be a kind of device (storm valve) to close the fluid passage, realizes block function.
Environmental protection and safety in production are more and more paid attention in countries in the world; All there are detailed laws and regulations in a lot of countries to the safety in production of oil gas well, stress to be positioned at that blowing possibly take place for densely populated areas, important economic zone, ocean and inland waters or excessive oil gas well is all installed storm valve.At present, domestic sea has the oil gas well of blowing ability that storm valve all is installed, and onshore oil field also uses storm valve more and more in the oil gas well.
Storm valve is a kind of underground equipment that prevents blowout, guarantees oil gas well production safety.When being in an emergency,, can adding hydraulic pressure through pipeline when needing to open and open valve plate exploitation through firm and hard the closing of oil gas well at present of the control pipeline release shut off valve that is connected to ground from valve body.But in the practice process, sometimes also might be owing to the abominable hole condition in down-hole cause the downhole safety defective valve, like the down-hole HTHP and the corrosive medium environment is arranged; The well that has even also contain the hydrogen sulfide corrosion of high concentration; So may or going out sand owing to corrosion under the adverse circumstances, cause the center pushing cylinder of storm valve to move, piston is choked to death; Perhaps because corrosion makes ageing of rubber cause piston seal to lose efficacy, make the storm valve can't operate as normal.In case lose efficacy the safety in production of oil supply gas well was brought hidden danger.Common way is that lift pipe string carries out workover treatment, and cost is very high and delay production like this.
The utility model content
The purpose of the utility model provides a kind of instrument that is used for the storm valve troubleshooting, solves the storm valve Problem of Failure under the situation that is implemented in fixed tubular column storm valve is carried out field maintenance.
The purpose of the utility model realizes through following technical proposals:
The instrument that is used for the storm valve troubleshooting comprises:
One locks sealing device, comprises first body of combination, in the pipe on the first body top, is set with first position-limiting drum; The top tube wall last week that is positioned at said first body, the outer wall that is positioned at the first body upper and lower was provided with first, second seal member that cooperates with the down-hole oil tube inwall to being provided with some first lock dogs that can move radially; The step that the bottom outer wall of said first position-limiting drum is provided with a band taper seat cooperates with first lock dog on first body; The middle part outer wall of first body is provided with one and is used for the first spacing cylindrical step;
One built-in safety valve comprises second body of combination, and said second body comprises a valve body at least, and valve body adopts the structure of existing storm valve; In the pipe on the said second body top, be set with second position-limiting drum; The top tube wall last week that is positioned at said second body, the outer wall that is positioned at the second body upper and lower was provided with the 3rd, the 4th seal member that cooperates with the down-hole oil tube inwall to being provided with some second lock dogs that can move radially; The step that the bottom outer wall of said second position-limiting drum is provided with a band taper seat cooperates with second lock dog on second body; The middle part outer wall of second body is provided with one and is used for the second spacing cylindrical step;
One punching instrument comprises a punching connecting cylinder, inserts the interior top connection of punching connecting cylinder, is positioned at the jumper bar that the punching connecting cylinder is connected with top connection; The tube wall of said punching connecting cylinder is provided with through hole radially, is provided with punch-head assembly in this through hole; The bottom of said jumper bar is provided with the inclined-plane and cooperates with said punch-head assembly.
Said first body is formed one successively by first fishing socket, first connecting cylinder, first upper seal bore, first central tube, lower seal tube and lower tube joint through being threaded; Said first lock dog is located on first connecting cylinder; Said first, second seal member is the sealed packing assembly, is located at respectively on upper seal bore and the lower seal tube; Said cylindrical step is located at the upper end of first connecting cylinder.
Said second body also comprises second fishing socket, second connecting cylinder, second upper seal bore, second central tube, the second lower seal tube successively through the composition one that is threaded, and the lower end of the second lower seal tube is threaded with said valve body; Said second lock dog is located on second connecting cylinder; Said the 3rd, the 4th seal member is the sealed packing assembly, is located at respectively on second upper seal bore and the valve body; The said second cylindrical step is located at the upper end of second central tube.
Punch-head assembly in the said drilling tool comprises drift, screw, pressing plate, punch holder, drift with pressing plate, through screw on punch holder, the inclined-plane of punch holder and said jumper bar employing dovetail groove cooperates.
After storm valve breaks down or lost efficacy, can cause downhole fluid that potential safety hazard out of control is arranged,, could solve the recovery problem of down-hole well control function through Ground Operation because product is positioned at and is difficult to carry out maintain and replace below the well head.The utility model is exactly a cover can be got rid of the storm valve fault through Ground Operation a opener.In case when storm valve can't be opened, utilize this instrument to operate on the ground, under the situation of lift pipe string not, the storm valve that breaks down is keeped in repair, the passage of hydrocarbon fluids is provided, the oil gas well is resumed production.The utility model also has advantage safe and reliable, easy to use.
Description of drawings
Fig. 1 is the structural representation of locking sealing device in the utility model.
Fig. 2 is that A-A of Fig. 1 is to view.
Fig. 3 is the I place partial enlarged drawing of Fig. 1.
Fig. 4 is the II place partial enlarged drawing of Fig. 1.
Fig. 5 is the operating principle sketch map of locking sealing device in the utility model.
Fig. 6 is the structural representation of built-in safety valve in the utility model.
Fig. 7 is the III place partial enlarged drawing of Fig. 6.
Fig. 8 is the IV place partial enlarged drawing of Fig. 6.
Fig. 9 is the V place partial enlarged drawing of Fig. 6.
Figure 10 is that the central tube 211 among Fig. 6 moves downward the sketch map that backs down valve plate.
Figure 11 is the operating principle sketch map of built-in safety valve in the utility model.
Figure 12 is the structural representation of drilling tool in the utility model.
Figure 13 is that B-B of Figure 12 is to view.
Figure 14 is the operating principle sketch map of drilling tool in the utility model.
Figure 15 removes hydraulic oil behind the drilling tool is got into oil pipe by the control pipeline sketch map.
The specific embodiment
Below in conjunction with practical implementation example and accompanying drawing the utility model is further described.
The instrument that is used for the storm valve troubleshooting is become by a locking sealing device, a built-in safety valve and a punching set of tools.
Said locking sealing device; Extremely shown in Figure 4 like Fig. 1; Comprise first body, said first body is formed one successively by first fishing socket 101, first connecting cylinder 104, first upper seal bore 105, first central tube 108, lower seal tube 109 and lower tube joint 112 through being threaded; In first fishing socket 101, be fitted with first position-limiting drum 102 through matched in clearance; On the barrel of first connecting cylinder 104, circumferentially be provided with some through holes; Be provided with one first lock dog 103 in each through hole; The afterbody of first lock dog 103 adopts the groove fit on projection 1031 and the tube inwall, first lock dog 103 can only radially be moved forward and backward in through hole and can not deviate from (referring to Fig. 2); On the outer wall of first upper seal bore 105 and lower seal tube 109, be respectively equipped with first, second seal member 106,111 that cooperates with the down-hole oil tube inwall; First, second seal member 106,111 is the sealed packing assembly; First seal member 106 is made up of rubber V-type packing 114 on the upper baffle ring 113, a group and lower baffle ring 115 jointly, and first seal member 106 is compressed by the connecting ring 107 of first central tube, 108 ends that are connected with first upper seal bore 105; Second seal member 111 is made up of rubber V-type packing 117 under the last back-up ring 116, a group and following back-up ring 118 jointly, connects 109 pairs second seal members 111 of lower seal tubes through bottom fitting 112 again and fixes; The step that the bottom outer wall of said first position-limiting drum 102 is provided with a band taper seat 1021 cooperates with first lock dog 103 on first connecting cylinder 104; Be provided with connecting ring 107 in the upper end of first central tube 108; First connecting cylinder 104 is provided with cylindrical step 1041.
Said built-in safety valve; Extremely shown in Figure 10 like Fig. 6; Comprise second body, said second body comprises that second fishing socket 201, second connecting cylinder 204, second upper seal bore 205, second central tube 206, union 207, valve body are successively through the composition one that is threaded; In second fishing socket 201, be fitted with second position-limiting drum 202 through matched in clearance; On the barrel of second connecting cylinder 204, circumferentially be provided with the structure of some second lock dog, 203, the second lock dogs 203 and the structure identical (referring to Fig. 2) of first lock dog 103; On the outer wall of second upper seal bore 205, be provided with the 3rd seal member 232 that cooperates with the down-hole oil tube inwall; The 3rd seal member 232 is the sealed packing assembly; By last back-up ring 221, go up sealed packing 222 and following back-up ring 223 is formed, second central tube, 206 connections, second upper seal bore 205 is fixed the 3rd seal member 232; The step that the bottom outer wall of said second position-limiting drum 202 is provided with a band taper seat 2021 cooperates with second lock dog 203 on second connecting cylinder 204; On second connecting cylinder 204, be provided with the second cylindrical step 2041.
Valve body adopts safety valve structure under the existing well, comprises hydraulic fitting 209, urceolus 214 and base body 217, and the piston 210 of a band sealing ring 224 is housed in the tube wall of hydraulic fitting 209; The bottom of said urceolus 214 inwalls is provided with the step to convex, and step is provided with packing ring 215; Said base body 217 is provided with the valve plate 218 of unidirectional unlatching, and valve plate 218 is connected the realization rotation through pin 231 with base body 217, and on pin 231, is installed with torsion spring 230, and torsion spring 30 is used to make valve plate 18 to reset to be sealed in base body 17; In institute's hydraulic fitting 209, being set with the central tube 211 that extends on the base body 217 axially cooperates with valve plate 218; Outside hydraulic fitting 209 ends, be provided with a baffle ring 212 and be fixed on the central tube 211 and and be connected, between packing ring 215 on the said urceolus 214 inwall bottom stage and baffle ring 212, be provided with a return spring 213 with the lower end of said piston 210; Union 207 in second body is threaded with the hydraulic fitting 209 of valve body, on union 207, is provided with piston entrance pressure hole 2071 and piston 210 UNICOMs; It is the sealed packing assembly that the outer wall of hydraulic fitting 209 is provided with the 4th seal member 233, the four seal members 233 that cooperate with the down-hole oil tube inwall, is made up of upper baffle ring 225, spacer ring 226, lower seal packing 227 and lower baffle ring 228.
Said drilling tool; Like Figure 12, shown in 13; Comprise a punching connecting cylinder 304; Top connection 301 is inserted in the punching connecting cylinders 304 and is fixing with pin 302, punching connecting cylinder 304 be provided with lock sealing device in the 3rd identical lock dog 303 of first lock dog, 103 structures, the jumper bar 300 that is positioned at punching connecting cylinder 304 is threaded with top connection 301; The barrel of punching connecting cylinder 304 is provided with cross-drilled hole radially; Be provided with punch-head assembly in this cross-drilled hole; Punch-head assembly comprises drift 305, screw 306, pressing plate 307, punch holder 308, and drift 305 usefulness pressing plates 307 are fixed on the punch holder 308 through screw 306, can change after the drift wearing and tearing during actual the use; The inclined-plane of punch holder 308 adopts dovetail groove 309 to cooperate with the inclined-plane 3001 of said jumper bar 300, and the promotion punch-head assembly moves horizontally and realizes punching when jumper bar 300 moves up and down.
The operating principle of the utility model:
See Fig. 5, storm valve 2 under normal circumstances, hydraulic oil gets in the valves from control pipeline 3; Promote piston 23 and move downward, drive the central tube 24 that is fixed in the valve body through the baffle ring 25 that is attached thereto and move downward, thereby the valve plate 27 of valve body bottom is backed down downwards; In the time of need closing storm valve 2; Close hydraulic oil and flow in the valve, under the effect of return spring 26, baffle ring 25 drive central tubes 24 move upward with piston 23 and reset.In the time of after the valve plate 27 of storm valve is closed, can not opening again, steel wire operation capable of using, the locking sealing device that is lowered to the utility model from ground makes the valve plate 27 of storm valve be in a state of often opening.During following well operations, the steel wire instrument 5 of available standards is connected on first fishing socket 101 of locking sealing device, and the locking sealing device is lowered in the storm valve 2 with continuous steel wire 6.This device carries out spacing by the cylindrical step 1041 of first connecting cylinder 104 at top connection step 22 places of fault storm valve 2.First lock dog 103 of this device is the mechanism that realizes with respect to fault storm valve lock function; Make first lock dog 103 radially outward stretch out first connecting cylinder 104 through inserting first position-limiting drum 102; Be stuck in the ring shaped slot 21 of top connection of fault storm valve 2 and can not withdraw from, realized that the locking sealing device relatively and the position and lock of fault storm valve 2.First central tube 108 of this device, the effect of going up sealed packing assembly 106 and lower seal packing assembly 111 are to realize that the upper-lower seal of fault storm valve 2 isolates, simultaneously at upper and lower oil pipe 1, a fluid passage is provided between 4.Be lowered to the locking sealing device and can solve fault storm valve 2 and can not open the problem that to produce, thereby realize that through inserting the locking sealing device valve plate passage of opening fault storm valve 2 resumes production; The last lower contact of the sealing storm valve that simultaneously if fault storm valve 2 leak source that seepage arranged also can be through the upper and lower sealed packing assembly 106,111 and first central tube 108; Prevent that seepage from causing tubing string to lose efficacy; The oil gas well is resumed production, for follow-up maintenance gains time rapidly.
During the well control function of the storm valve that recovers to break down when needs; Should adopt the drilling tool of the utility model that the control pipeline is carried out drilling operation earlier; With the pressure in UNICOM's fault storm valve and the oil pipe, the hydraulic oil of control pipeline can be got in the valve body of built-in safety valve.During drilling tool work; Shown in figure 14, the steel wire vibration instrument of drilling tool and standard 312 polyphones are connect, be lowered in the oil pipe through steel wire 313; Location when the punching connecting cylinder of drilling tool 304 arrives spacing position 22; The 3rd lock dog 303 on the punching connecting cylinder 304 is stuck in ring shaped slot 21 lock of the top connection of fault storm valve 2, downward vibration jumper bar 304, and punching forms linked hole b at punch position a place through punch-head assembly; The hydraulic oil of control pipeline 3 is got in the storm valve 2 (seeing Figure 15) through linked hole b, send into for follow-up built-in safety valve and prepare.
The installation of the built-in safety valve of the utility model is shown in figure 11; Steel wire running tool with standard is lowered to built-in safety valve in the storm valve 2 from well head; Built-in safety valve is spacing in the spacing position 22 of storm valve through the second cylindrical step 2041 on it, and through latched position 21 lockings of second lock dog 203 at storm valve 2.The effect of the 3rd seal member 232 and the 4th seal member 233 is the isolation that realize tubing pressure and control pipeline 6 pressure.The structure of built-in safety valve is the same with existing storm valve with operating principle; After hydraulic oil gets into built-in safety valve 2 through linked hole b; 2071 get into built-in safety valve from piston entrance pressure hole; Promote piston 210 and move downward, piston 210 moves downward through baffle ring 212 drive central tubes 211 and backs down valve plate 218, opens the production passage.Run into emergency; Control pipeline 3 releases of fault storm valve, piston 210 move moving and drive on the central tube 211 in the meeting under the effect of return spring 213, and valve plate 218 is at return under the effect of torsion spring 230 and be sealed on the pedestal 217; Realize closing of oil pipe 4, guarantee safety.
In the practical application, can use different tools to keep in repair as requested.Need not recover well control like the client and then only need to use the locking sealing device in the utility model; If customer requirement is recovered well control then can be used drilling tool and the built-in safety valve in the utility model.When field condition does not allow, can use the locking sealing device to keep in repair earlier, adopt drilling tool and built-in safety valve to carry out the processing in later stage again after the well of the storm valve that breaks down is resumed production earlier.The form that the utility model is sent into underground work has multiple, as adopting cable or coiled tubing to send into through the top sub of changing each instrument steel wire operation, also can realize the identical function of this utility model.
Claims (4)
1.
A kind of instrument that is used for the storm valve troubleshooting is characterized in that comprising:
One locks sealing device, comprises first body of combination, in the pipe on the first body top, is set with first position-limiting drum; The top tube wall last week that is positioned at said first body, the outer wall that is positioned at the first body upper and lower was provided with first, second seal member that cooperates with the down-hole oil tube inwall to being provided with some first lock dogs that can move radially; The step that the bottom outer wall of said first position-limiting drum is provided with a band taper seat cooperates with first lock dog on first body; The middle part outer wall of first body is provided with one and is used for the first spacing cylindrical step;
One built-in safety valve comprises second body of combination, and said second body comprises a valve body at least, and valve body adopts the structure of existing storm valve; In the pipe on the said second body top, be set with second position-limiting drum; The top tube wall last week that is positioned at said second body, the outer wall that is positioned at the second body upper and lower was provided with the 3rd, the 4th seal member that cooperates with the down-hole oil tube inwall to being provided with some second lock dogs that can move radially; The step that the bottom outer wall of said second position-limiting drum is provided with a band taper seat cooperates with second lock dog on second body; The middle part outer wall of second body is provided with one and is used for the second spacing cylindrical step;
punching instrument comprises a punching connecting cylinder, inserts the interior top connection of punching connecting cylinder, is positioned at the jumper bar that the punching connecting cylinder is connected with top connection; The tube wall of said punching connecting cylinder is provided with through hole radially, is provided with punch-head assembly in this through hole; The bottom of said jumper bar is provided with the inclined-plane and cooperates with said punch-head assembly.
2.
instrument that is used for the storm valve troubleshooting according to claim 1 is characterized in that first body in the said locking sealing device is formed one successively by first fishing socket, first connecting cylinder, first upper seal bore, first central tube, lower seal tube and lower tube joint through being threaded; Said first lock dog is located on first connecting cylinder; Said first, second seal member is the sealed packing assembly, is located at respectively on upper seal bore and the lower seal tube; Said cylindrical step is located at the upper end of first connecting cylinder.
3.
instrument that is used for the storm valve troubleshooting according to claim 1; It is characterized in that second body in the said built-in safety valve also comprises second fishing socket, second connecting cylinder, second upper seal bore, second central tube, the second lower seal tube successively through the composition one that is threaded, the lower end of the second lower seal tube is threaded with said valve body; Said second lock dog is located on second connecting cylinder; Said the 3rd, the 4th seal member is the sealed packing assembly, is located at respectively on second upper seal bore and the valve body; The said second cylindrical step is located at the upper end of second central tube.
4.
instrument that is used for the storm valve troubleshooting according to claim 1; It is characterized in that the punch-head assembly in the said drilling tool comprises drift, screw, pressing plate, punch holder; Drift with pressing plate, through screw on punch holder, the inclined-plane of punch holder and said jumper bar employing dovetail groove cooperates.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202402203U CN202165038U (en) | 2011-07-08 | 2011-07-08 | Tool for fault treatment of underground safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202402203U CN202165038U (en) | 2011-07-08 | 2011-07-08 | Tool for fault treatment of underground safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202165038U true CN202165038U (en) | 2012-03-14 |
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ID=45800873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202402203U Expired - Lifetime CN202165038U (en) | 2011-07-08 | 2011-07-08 | Tool for fault treatment of underground safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202165038U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015665A (en) * | 2016-06-29 | 2016-10-12 | 宝鸡石油机械有限责任公司 | Steel wire rope tripping-in recovery type secondary safety valve |
| CN109209249A (en) * | 2018-10-16 | 2019-01-15 | 中国海洋石油集团有限公司 | A kind of flow string, drilling tool and producing well |
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
| CN111878024A (en) * | 2020-06-29 | 2020-11-03 | 中国石油天然气股份有限公司 | Drilling tool and method for pipe column steel wire operation |
| CN113464091A (en) * | 2021-06-21 | 2021-10-01 | 湖南唯科拓石油科技服务有限公司 | A reaming is instrument of opening by force for in relief valve in pit |
| CN113494270A (en) * | 2020-03-19 | 2021-10-12 | 中国海洋石油集团有限公司 | Full-bore forced opening tool for underground safety valve |
| CN116201496A (en) * | 2023-02-24 | 2023-06-02 | 百勤能源科技（惠州）有限公司 | Self-positioning perforating tool for downhole oil pipe safety valve |
-
2011
- 2011-07-08 CN CN2011202402203U patent/CN202165038U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015665A (en) * | 2016-06-29 | 2016-10-12 | 宝鸡石油机械有限责任公司 | Steel wire rope tripping-in recovery type secondary safety valve |
| CN109209249A (en) * | 2018-10-16 | 2019-01-15 | 中国海洋石油集团有限公司 | A kind of flow string, drilling tool and producing well |
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
| CN113494270A (en) * | 2020-03-19 | 2021-10-12 | 中国海洋石油集团有限公司 | Full-bore forced opening tool for underground safety valve |
| CN113494270B (en) * | 2020-03-19 | 2023-05-09 | 中国海洋石油集团有限公司 | Full-drift-diameter forced opening tool for underground safety valve |
| CN111878024A (en) * | 2020-06-29 | 2020-11-03 | 中国石油天然气股份有限公司 | Drilling tool and method for pipe column steel wire operation |
| CN113464091A (en) * | 2021-06-21 | 2021-10-01 | 湖南唯科拓石油科技服务有限公司 | A reaming is instrument of opening by force for in relief valve in pit |
| CN113464091B (en) * | 2021-06-21 | 2023-02-17 | 湖南唯科拓石油科技服务有限公司 | A reaming is instrument of opening by force for in relief valve in pit |
| CN116201496A (en) * | 2023-02-24 | 2023-06-02 | 百勤能源科技（惠州）有限公司 | Self-positioning perforating tool for downhole oil pipe safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHI JINJING Free format text: FORMER OWNER: HUNAN VICTOR PETROLEUM TECHNOLOGY SERVICE CO., LTD. Effective date: 20130216 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130216 Address after: 410001 Zhenhua Road 199, Pioneer Center of environmental protection science and Technology Industrial Park, Yuhua District, Hunan, Changsha Patentee after: Shi Jinjing Address before: 410001 Zhenhua Road 199, Pioneer Center of environmental protection science and Technology Industrial Park, Yuhua District, Hunan, Changsha Patentee before: Hunan Victor Petroleum Technology Service Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: HUNAN VICTOR PETROLEUM TECHNOLOGY SERVICE CO., LTD Free format text: FORMER OWNER: SHI JINJING Effective date: 20130402 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130402 Address after: 410001 Zhenhua Road 199, Pioneer Center of environmental protection science and Technology Industrial Park, Yuhua District, Hunan, Changsha Patentee after: Hunan Victor Petroleum Technology Service Co., Ltd. Address before: 410001 Zhenhua Road 199, Pioneer Center of environmental protection science and Technology Industrial Park, Yuhua District, Hunan, Changsha Patentee before: Shi Jinjing |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
|
| CX01 | Expiry of patent term |