CN2753869Y - Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device - Google Patents
Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device Download PDFInfo
- Publication number
- CN2753869Y CN2753869Y CN 200420092307 CN200420092307U CN2753869Y CN 2753869 Y CN2753869 Y CN 2753869Y CN 200420092307 CN200420092307 CN 200420092307 CN 200420092307 U CN200420092307 U CN 200420092307U CN 2753869 Y CN2753869 Y CN 2753869Y
- Authority
- CN
- China
- Prior art keywords
- pressure
- rod
- natural gas
- blanking plug
- core bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005380 natural gas recovery Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 210000002445 nipple Anatomy 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 28
- 239000003345 natural gas Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 4
- 239000003921 oil Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 10
- 239000002343 natural gas well Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
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Abstract
The utility model relates to a snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device, which is composed of a frame supporting post, a supporting cross beam, an adjusting screw, a lifting pressure liquid cylinder, a high-pressure short joint, a core rod of a blocking device, a sealing rubber barrel, a pressure rod for the expansion of the sealing rubber barrel, a limiting rod for the seat seal of the sealing rubber barrel, etc. A core rod of a blocking device and the sealing rubber barrel of an end part are installed in an oil pipe of a hanger short joint or under the hanger short joint under action in the lifting pressure liquid cylinder. A limiting nut is loosened, the sealing rubber barrel is expanded by a cone to block an air source in a well, a piston rod is disassembled after the core rod of the blocking device is fixed by a clamping disk beam, a main sluice valve which needs replacing is removed and a new sluice valve is mounted. An opposite operation process is adopted to complete the total work of a snubbing replaceable sluice valve. Because the sealing rubber barrel has no clamp tile fixture and no consideration of the break of a well steel wire, the project accident that the blocking device is clamped in the well can not happen; meanwhile, the display surveillance of pressure exists to accurately judge whether a wellhead is sealed or not, so the leakage accident of high-pressure natural gas can not happen in the process of replacing the sluice valve. Thereby, the utility model has the maximum characteristic of safety. After the utility model is horizontally mounted, a sleeve pipe sluice valve can be replaced.
Description
Affiliated technical field
The utility model relates to a kind of under the condition of not kill-job, changes the device of the gate valve that has damaged in the existing various high-pressure natural gas gas wellhead equipments, the device of the various high-pressure natural gas gas production wellhead of particularly a kind of non-well killing change sleeve pipe gate valve.
Background technology
Critical piece in the natural gas gas wellhead equipment is made up of various high pressure sluice valves.Because in long-term use, the burn into that constantly is subjected to pernicious gas such as hydrogen sulfide in the natural gas washes away, simultaneously because natural gas well head device is bearing huge pressure (may reach more than the 100Mpa sometimes), so the gate valve damage is a common faults.The total gate valve that replacing has damaged and the standard practice of sleeve pipe gate valve are: according to the pressure of natural gas well head, the kill-job liquid of preparation different densities, inject into well, push down natural gas reservoir, under the well head passive state, change the total gate valve and the sleeve pipe gate valve that have damaged in the natural gas gas wellhead equipment safely.This technological measure generally will spend hundreds thousand of yuans, and because kill-job liquid has inevitable ground contamination to natural gas reservoir, after resuming production, its output approximately will reduce by 1/5th to 1/3rd generally speaking.
Under the state of not kill-job, directly change the gate valve in the high-pressure natural gas gas production wellhead, be a kind of very dangerous Operating Pressure (also claiming online assignment).Consider that medium is high pressure, inflammable, poisonous natural-gas, the threat and the gas well of operating personnel's personal safety are revealed the heavy damage of back to environment, therefore, allow Operating Pressure in no instance.
Domestic some gas production enterprise, for example on the Gas field, the method that adopts is: with a kind of down-hole oil tube blanking plug, the method of using the piano wire operation is placed in apart from the oil pipe about the following 200m of well head, and block oil pipe natural gas passage, change the well head gate valve again, and then salvage tubing plug, resume production.The application of this method in the underground work of petroleum industry has semicentennial history.Facts have proved, the success rate of operation has only about 90%, this is because tubing plug setting by slips in oil pipe finished, and slips might stuckly can't be salvaged out at tubing wall, cause a serious accident, also might slips can not be at the tubing wall seat of honour fixed and cause the sealing operation failure.In the piano wire operation, the fracture of steel wire also can cause great underground work accident.This method can not be used in the operation of casing replacing gate valve more.
At present, do not see other method except that using tubing plug shutoff natural gas passage at home and abroad as yet, under not kill-job situation, change the open report of all kinds high-pressure natural gas well head total gate valve and sleeve pipe gate-valve device.
Summary of the invention
The purpose of this utility model provides a kind of Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing, in order to solve existing method is lowered to the device of tubing plug with steel wire operation integrity problem, and can't solve in the existing method under not kill-job state, the problem of casing replacing gate valve more, the utility model proposes the general technical thinking that solves existing issue is: without the piano wire operation, earlier near the passage of high-pressure natural gas well head blocked, under passive state, change gate valve then, open passage after finishing again, resume production.
The utility model proposes the technical scheme that solves its technical problem is: a kind of Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing, it comprises frame, crossbeam in the frame top arrangement, adjusting screw(rod) and the rotary handle installed in the crossbeam, the lifting pressurization oil cylinder that central rack is installed, the opening chuck beam that settle the frame lower end, promote the in-oil cylinder lower piston rod of pressurization, the blanking plug of lower piston rod end and attached pressure meter, the venting gate valve, the hand oil pump station, high-pressure hose and joint, frame is made up of the column of two symmetries, trapezoidal thread and two trapezoidal nuts that are meshed are arranged at the bottom of column, column is installed in the screw of gas production wellhead big four and big flange coupling, the upper end of the adjusting screw(rod) of installing in the crossbeam of frame top and the engagement of the box thread in the rotary handle, the lifting of central rack pressurize in-oil cylinder upper piston rod and adjusting screw(rod) lower end, use public, the generating circle male screw connects mutually, promote between in-oil cylinder lower piston rod of pressurization and the blanking plug and also use public affairs, the generating circle male screw connects, the lower contact first line of a couplet that promotes the pressurization oil cylinder is knotted the high pressure pipe nipple, while is setting pressure table and venting gate valve in the lower contact that promotes the pressurization oil cylinder, an annular slot is arranged on the described blanking plug core bar, dual self-sealing cartridge is housed on the sealed tube of blanking plug core bar bottom, one cone is arranged at the bottom of cartridge, cone connects by pre-pad and pressurization mandrel, between pressurization mandrel and the core bar potted component is arranged, the line slip of going forward side by side is sealed and matched, described adjusting screw(rod), on piston reaches, lower piston rod, the top of blanking plug core bar is the identical through hole of a diameter.
Compared with prior art, the beneficial effects of the utility model are:
1. be lowered to the method that blanking plug no longer adopts the piano wire operation, therefore stopped the underground work accident that piano wire fracture, blanking plug can't be salvaged etc., blanking plug is with in the hanger and hanger pipe nipple thereof in the wellhead assembly under the lower piston rod that promotes the pressurization oil cylinder, even seat envelope failure, also can carry out the operation second time or operation for the third time safely, operating risk be reduced to minimum.
2. adopt to promote pressurization oil cylinder this cover replacing natural gas gas production wellhead gate-valve device and method, also can be used to more casing replacing gate valve,, therefore solved and to have solved the more problem of casing replacing gate valve in the existing method as long as this covering device level is installed.
So the total effect of the utility model is: guaranteed the job safety in the non-well killing change high-pressure natural gas well head gate valve overall process, solved the more problem of casing replacing gate valve, greatly reduced the expense of gas well mouth maintenance activity.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is that Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing is changed the schematic diagram that installs on the well head of gate valve at need.
Fig. 2 be on the Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing the blanking plug cartridge shutoff the natural gas passage, the chuck beam is the schematic diagram after fixing with the blanking plug core bar.
Fig. 3 is that the lower piston rod in the Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing separates at male and female cylindrical thread place with the blanking plug core bar, and has been up to the schematic diagram of high pressure pipe nipple lower surface.
Fig. 4 is that Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing has been finished and will be damaged gate valve and remove, does not insert the schematic diagram of new gate valve as yet.
Among the figure, 1. big flange bolt; 2. column; 3. trapezoid buckle nut; 4. support crossbeam; 5. adjusting screw(rod); 6. rotary handle; 7. promote the pressurization fluid cylinder; 8. upper piston rod; 9. piston; 10. lower piston rod; 11. the male and female cylindrical thread joint on the blanking plug core bar; 12. blanking plug core bar; 13. the cannelure on the blanking plug core bar; 14. cartridge; 15. cone; 16. packing element pressure rod; 17. loaded pins; 18. sealing ring; 19. sealed tube; 20. fluid sealant cylinder base octant position bar; 21. stop nut; 22. promote the top connection of pressurization fluid cylinder; 23. promote the lower contact of pressurization fluid cylinder; 24. monitor pressures table; 25. vent valve; 26. high pressure pipe nipple; 27. main gate valve; 28. hanger pipe nipple; 29. main gate valve connecting bolt; 30. opening chuck beam.
The specific embodiment
Below in conjunction with accompanying drawing and concrete embodiment mode the utility model is described in further detail below:
In embodiment shown in Figure 1, at first on symmetric position, two root posts (2) in the frame are installed in the screw of gas production wellhead big four and big flange coupling, install in order then and support crossbeam (4), adjusting screw(rod) (5), promote pressurization fluid cylinder (7), high pressure pipe nipple (26), connect blanking plug core bar and lower seal packing element device, at last high pressure pipe nipple bottom and the main gate valve (27) that needs to change are coupled together, install pressure meter in the relevant position, the venting gate valve, hydraulic hose and joint, whole installation works of non-well killing change gate-valve device are finished at hand oil pump stations etc.In the embodiment shown in Figure 2, the flashboard of the main gate valve that damages is opened.And hydraulic oil is injected the top of piston (9) by promoting pressurization fluid cylinder top connection (22) by the hand oil pump station, and it is descending to rotate adjusting screw(rod) (5) simultaneously, and upper piston rod (8) drives the blanking plug core bar, and cartridge (14) is delivered in the hanger pipe nipple (28).Then stop nut (21) is unclamped, packing element pressure rod (16) is under the effect of natural gas well internal pressure, upwards item is driven fluid sealant cylinder base octant position bar (20), drive cone (15) upwards by loaded pins (17) simultaneously, distending cartridge (14), inner and sealed tube (19) seals, and outside and hanger pipe nipple (28) sealing is to block the down-hole source of the gas.At this moment, vent valve (25) is opened, bled off the residual air in the high pressure pipe nipple (26), close then, observe monitor pressures table (24), show, prove and stop up success as no pressure.Dismantle main gate valve connecting bolt (29), then hydraulic oil is pumped into by promoting pressurization fluid cylinder top connection (22) once more, make and promote that pressurization fluid cylinder band high pressure pipe nipple (26) and the main gate valve (27) that damaged moves up, behind the male and female cylindrical thread joint (11) and the cannelure (13) on the blanking plug core bar that expose on the blanking plug core bar, stop uply, and be fixed on the column (2) by promoting pressurization fluid cylinder (7).Then, opening chuck beam (30) is snapped in the cannelure (13) on the blanking plug core bar, two ends snap in the column (2) of both sides, and are fixed on up and down on the column of both sides with trapezoid buckle nut (3).
In the embodiment shown in Figure 3, locate to dismantle being connected of upper piston rod (8) and blanking plug core bar (12) by the male and female cylindrical thread joint (11) on the blanking plug core bar, rotate rotary handle (6), make upper piston rod (8) up, blanking plug is contracted to high pressure pipe nipple (26).
In the embodiment shown in Figure 4, the main gate valve (27) that damages is removed, do not inserted the position of new gate valve as yet.Insert after the new gate valve,, finish the work of whole non-well killing change gate valves according to opposite operation sequence.
Claims (4)
1. Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing, it comprises frame, crossbeam in the frame top arrangement, adjusting double-screw bolt and the rotary handle installed in the crossbeam, the lifting pressurization oil cylinder that central rack is installed, the opening chuck beam that settle the frame lower end, promote the in-oil cylinder lower piston rod of pressurization, the blanking plug of lower piston rod end and attached pressure meter, the venting gate valve, the hand oil pump station, high-pressure hose and joint, it is characterized in that, frame is made up of the column of two symmetries, trapezoidal thread and two trapezoidal nuts that are meshed are arranged at the bottom of column, column is installed in the screw of gas production wellhead big four and big flange coupling, the upper end of the adjusting screw(rod) of installing in the crossbeam of frame top and the engagement of the box thread in the rotary handle, the lifting of central rack pressurize in-oil cylinder upper piston rod and adjusting screw(rod) lower end, use public, the generating circle male screw connects mutually, also connect between lower piston rod in the operating cylinder and the blanking plug with the male and female cylindrical thread, the lower contact first line of a couplet that promotes the pressurization oil cylinder is knotted the high pressure pipe nipple, and at lower contact setting pressure table and venting gate valve, an annular slot is arranged on the described blanking plug core bar, on the sealed tube of plug device core bar bottom dual self-sealing cartridge is housed, one cone is arranged at the bottom of cartridge, cone connects by pre-pad and pressurization mandrel, between pressurization mandrel and the blanking plug core bar potted component is arranged, the line slip of going forward side by side is sealed and matched, described adjusting screw(rod), piston reaches goes up lower piston rod, the top of blanking plug core bar is the identical through hole of a diameter.
2. a kind of Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing according to claim 1, it is characterized in that, cartridge on the blanking plug core bar, down in hanger pipe nipple or the oil pipe below the hanger pipe nipple, the adjusting screw(rod) of hollow bore, piston and on a packing element pressure rod is housed in the lower piston rod, the lower surface of packing element pressure rod is contained on the upper surface of pressurization mandrel, and the upper end of packing element pressure rod is by moving in the stop nut restriction that is installed in the adjusting screw(rod) end face.Recommend the cartridge external diameter than the little 3-4mm of hanging pup joint internal diameter.
3. a kind of Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing according to claim 1, it is characterized in that, central opening on the opening chuck beam, be stuck in the cannelure on the blanking plug core bar, opening chuck beam both ends open snaps in respectively on the framework pillar of both sides, four trapezoidal nuts, upper and lower at opening chuck beam two ends is fixed on opening chuck beam on the trapezoidal thread of column respectively.
4. a kind of Device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing according to claim 1 is characterized in that the nipple between blanking plug core bar and the lower piston rod is removable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092307 CN2753869Y (en) | 2004-09-11 | 2004-09-11 | Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092307 CN2753869Y (en) | 2004-09-11 | 2004-09-11 | Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753869Y true CN2753869Y (en) | 2006-01-25 |
Family
ID=35925977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420092307 Expired - Lifetime CN2753869Y (en) | 2004-09-11 | 2004-09-11 | Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753869Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434701C (en) * | 2006-09-18 | 2008-11-19 | 西安交通大学 | Hydraulic thrust mechanism of axial force in electrical single-screw submersible pump |
| CN101538989B (en) * | 2009-04-10 | 2011-10-26 | 煤炭科学研究总院西安研究院 | Quick-change slips hydraulic rubber cylinder chuck |
| CN101538995B (en) * | 2009-02-27 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for replacing valve by utilizing borehole pressure |
| CN103912228A (en) * | 2012-12-31 | 2014-07-09 | 托普威尔石油技术股份公司 | Non-releasing gate valve replacement device |
| CN104879079A (en) * | 2015-06-05 | 2015-09-02 | 辽宁石油机械制造有限公司 | Sluice-valve under-pressure replacement device and method of oil extraction wellhead |
| CN104481446B (en) * | 2014-10-10 | 2017-02-15 | 中国石油天然气股份有限公司 | Hanging blanking plug |
| CN106854983A (en) * | 2015-12-08 | 2017-06-16 | 中国石油天然气股份有限公司 | Plug for tubing coupling |
| CN110281203A (en) * | 2019-06-19 | 2019-09-27 | 中铁工程装备集团有限公司 | A kind of normal pressure changes alloy cutter sealing device maintenance replacement tooling and application method |
| CN111878020A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Tool and method for replacing valve under pressure |
| CN111878023A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Under-pressure valve repairing tool and method |
| CN111878715A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Full-time intelligent management system and method for oil and gas pipe network |
| CN113090215A (en) * | 2021-04-07 | 2021-07-09 | 西安宇星石油机械新技术开发有限公司 | Gas well casing pipe non-releasing pressure blocking wellhead replacing device |
-
2004
- 2004-09-11 CN CN 200420092307 patent/CN2753869Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434701C (en) * | 2006-09-18 | 2008-11-19 | 西安交通大学 | Hydraulic thrust mechanism of axial force in electrical single-screw submersible pump |
| CN101538995B (en) * | 2009-02-27 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for replacing valve by utilizing borehole pressure |
| CN101538989B (en) * | 2009-04-10 | 2011-10-26 | 煤炭科学研究总院西安研究院 | Quick-change slips hydraulic rubber cylinder chuck |
| CN103912228A (en) * | 2012-12-31 | 2014-07-09 | 托普威尔石油技术股份公司 | Non-releasing gate valve replacement device |
| CN103912228B (en) * | 2012-12-31 | 2017-06-23 | 托普威尔石油技术股份公司 | Do not give up replacing device for gate valve |
| CN104481446B (en) * | 2014-10-10 | 2017-02-15 | 中国石油天然气股份有限公司 | Hanging blanking plug |
| CN104879079A (en) * | 2015-06-05 | 2015-09-02 | 辽宁石油机械制造有限公司 | Sluice-valve under-pressure replacement device and method of oil extraction wellhead |
| CN106854983A (en) * | 2015-12-08 | 2017-06-16 | 中国石油天然气股份有限公司 | Plug for tubing coupling |
| CN110281203A (en) * | 2019-06-19 | 2019-09-27 | 中铁工程装备集团有限公司 | A kind of normal pressure changes alloy cutter sealing device maintenance replacement tooling and application method |
| CN110281203B (en) * | 2019-06-19 | 2023-11-14 | 中铁工程装备集团有限公司 | Maintenance and replacement tool for normal-pressure alloy-replacement tool sealing device and use method |
| CN111878020A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Tool and method for replacing valve under pressure |
| CN111878023A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Under-pressure valve repairing tool and method |
| CN111878715A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Full-time intelligent management system and method for oil and gas pipe network |
| CN111878023B (en) * | 2020-08-28 | 2024-03-22 | 西安东新石油设备厂有限公司 | Tool and method for repairing valve under pressure |
| CN111878020B (en) * | 2020-08-28 | 2024-04-16 | 西安东新石油设备厂有限公司 | Valve replacing tool with pressure and method |
| CN113090215A (en) * | 2021-04-07 | 2021-07-09 | 西安宇星石油机械新技术开发有限公司 | Gas well casing pipe non-releasing pressure blocking wellhead replacing device |
| CN113090215B (en) * | 2021-04-07 | 2022-12-30 | 西安宇星石油机械新技术开发有限公司 | Gas well casing non-releasing pressure blocking wellhead replacing device |
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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: XI AN DONGXIN PETROLEUM EQUIPMENT FACTORY CO., LT Free format text: FORMER OWNER: GONG WEIAN Effective date: 20071026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071026 Address after: 81 No. 710600 Shaanxi city in Xi'an Province Economic Development Zone Lintong Road Bridge Patentee after: Xi'an Dongxin Petroleum Equipment Plant Co., Ltd. Address before: 710021 Shaanxi province Xi'an Weiyang Changqing prosperous Park District 1 District 14 Building 2 unit 301 Patentee before: Gong Weian |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: The Western Branch (Beijing) oil and gas equipment technology Assignor: Xi'an Dongxin Petroleum Equipment Plant Co., Ltd. Contract fulfillment period: 2009.2.16 to 2014.2.16 Contract record no.: 2009110000012 Denomination of utility model: Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device Granted publication date: 20060125 License type: Exclusive license Record date: 20090306 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.2.16 TO 2014.2.16; CHANGE OF CONTRACT Name of requester: XIYU KECHUANG(BEIJING) OIL-GAS EQUIPMENT TECHNOLOG Effective date: 20090306 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140911 Granted publication date: 20060125 |