CN1900521A - Fishable linear motor reciprocating pump - Google Patents
Fishable linear motor reciprocating pump Download PDFInfo
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- CN1900521A CN1900521A CN 200510085460 CN200510085460A CN1900521A CN 1900521 A CN1900521 A CN 1900521A CN 200510085460 CN200510085460 CN 200510085460 CN 200510085460 A CN200510085460 A CN 200510085460A CN 1900521 A CN1900521 A CN 1900521A
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Abstract
The reciprocating pump in use for oil spring is composed of cable, a pump, anchoring sealing arrangement, linear motor, and oil pipe. Linear motor is cylinder type permanent magnet linear synchro motor. Motor is composed of stator and mover. Stator is a winding, and mover is a permanent magnet. Through connecting rod, mover of linear motor is connected to plunger of reciprocating pump. Reciprocating pump is positioned at up part of the linear motor. The anchoring sealing arrangement plays function of fixation and seal. Through release drum, oil well pump and inner core of linear motor are seated on sealed drum of the anchoring sealing arrangement, and are possible to be picked out through junk basket, but cable can remain under well. The invention crates new structure of reciprocating pump, and solves difficulties that it must pick cable up or put cable down at same time when reciprocating pump is picked up or put down.
Description
Technical field
The present invention relates to a kind of down-hole reciprocating pump that is applied to petroleum production, the reciprocating pump that particularly a kind of down-hole linear motor drives.Belong to the mechanical oil recovery field, be suitable for mechanical producing well, be particularly suitable for inclined shaft, directional well, horizontal well and the oil recovery of eccentric wear well and use.
Background technique
At present, existing linear electric motor are applied under the oil well, directly drive the report and the patent application of reciprocating pump work.As " electrical submersible permanent magnet linear reciprocating pump " patent publication No. CN 1563715A; " a kind of plunger oil-well pump of linear motor driving " patent publication No. CN 1587708A; " the energy-conservation submersible electric pump extracting device of oil of cylindrical shape rare earth permanent magnet linear motor driving " is exactly wherein several examples.Linear electric motor are applied in driving reciprocating pump oil recovery under the oil well, are energy saving, reduce the pumping unit floor space, save the good method of cost for oil production.Attracted many engineers and technicians to study.But applicable line motor driving reciprocating pump recovers the oil and does not really see at the scene.This is because the reciprocating pump oil recovery scheme of present linear motor driving also exists practical problem not to be resolved.As in these above-mentioned patents, there being a common structural disadvantages.At present, the oil recovery reciprocating pump of linear motor driving, structure is that linear motor rotor, stator and reciprocating pump are installed on the interior oil pipe of oil well casing, shortcoming is exactly: the mover of linear electric motor and the mounting point of stator are on the top of reciprocating pump.When maintenance reciprocating pump and linear electric motor, the electricity cable of linear electric motor must same reciprocating pump, linear electric motor together trip out from oil well casing.The operator and the technician that are engaged in well workover know, are subjected to the influence of well inclined angle and azimuthal variation, and cable is being gone into the well or tripped out in the process, and easy and sleeve pipe, oil pipe push the as easy as rolling off a log cable failure that causes.If impaired when tripping out cable, when pump down, change a new cable; If cable is impaired when following cable, installation pump, the oil recovery reciprocating pump of mounted linear motor driving must be tripped out together with cable, change new cable.The downhole cable of one radical km is worth more than 10 ten thousand yuan.Changing the oil recovery reciprocating pump structure of linear motor driving, overcome the impaired problem of downhole cable, is the key of implementing present technique, also is that the technician wants the difficult problem that solves for a long time.
Summary of the invention
The purpose of this invention is to provide a kind of Fishable linear motor reciprocating pump, changed the oil recovery reciprocating pump structure of original linear motor driving, the plunger position of oil well pump or double acting sucker rod pump has been connected on the linear motor rotor.Stator coil power supply when electricity cable is given linear electric motor produces air-gap field, and linear motor rotor and air-gap field interact and produce electromagnetic push, follow ripple magnetic direction moving linearly, current direction changes, the direction of power and corresponding change realizes driving the reciprocating pump to-and-fro motion; In the annular space of cable position between sleeve pipe and oil pipe, only need during the maintenance reciprocating pump in oil pipe, to take out reciprocating pump and electric mover, do not need to take out linear motor stator electric, so the cable between sleeve pipe and the oil pipe does not need to take out yet from well.The reciprocating pump that overcomes existing down-hole linear motor driving is when maintenance, and electricity cable must trip out, the deficiency of the easy crush injury of cable.
Task of the present invention realizes by following proposal.
Fishable linear motor reciprocating pump mainly consists of the following components: cable, oil pipe, centralizer, anchoring device, fishing head, reciprocating pump, grappling seal arrangement, linear electric motor are formed.Linear electric motor adopt permanent-magnet material to make high thrust jogging speed cylindrical permanent linear synchronous motor, and it is made up of stator and mover, and the critical piece of stator is a coil, and the critical piece of mover is a permanent magnet.Feature is: the mover of linear electric motor is connected with the reciprocating pump plunger by the mover connecting rod.The position of reciprocating pump is on the top of linear electric motor.The position of grappling seal arrangement is between reciprocating pump and linear electric motor.The grappling seal arrangement has two effects, and the one, linear motor stator electric is fixed on the external sealed that is connected oil pipe, another is to stop oily oil well pump to be pumped into that the liquid in the oil pipe leaks on the pump downwards.
The feature of described reciprocating pump is: standing valve and travelling valve are arranged in the tubular pump housing, and standing valve is on travelling valve top.The standing valve ball is arranged in the standing valve.In the tubular pump housing plunger is arranged, the plunger and the pump housing are slidingly matched, and the travelling valve ball is arranged in the plunger.The plunger bottom connects the mover connecting rod.Linear motor rotor and reciprocating pump plunger are linked together, and linear motor rotor moves up and down, and drives plunger upward and downward.Mover connecting rod center is porose, and the well liquid of lifting can enter reciprocating pump by mover connecting rod center hole.Spiracle is arranged at the bottom of pump barrel, and when plunger was up and down, the well liquid of plunger lower space can pass in and out.Other concrete structure of the plunger of reciprocating pump, travelling valve ball and standing valve ball is not described in detail, and those skilled in the art can finish design with reference to above-mentioned feature.
What above-mentioned linear electric motor adopted is that Nd-Fe-Bo permanent magnet material is made high thrust jogging speed cylindrical permanent linear synchronous motor.Linear electric motor are made up of stator and mover two large divisions: stator is made up of tube shaped electric machine shell, stator magnet iron core, stator coil, internal lining pipe.Mover is made by Nd-Fe-Bo permanent magnet material, and the feature of linear electric motor is: the porose well liquid in mover center can enter the connecting rod center hole by the mover hole, enters reciprocating pump again.
On the mover connecting rod outer wall between reciprocating pump and the linear motor rotor, support ring and spring detent are arranged, cooperate fixing interior center device with sealing drum.Also has seal ring on the mover connecting rod outer wall.
For center device in the Fishable linear motor reciprocating pump that linear motor rotor, mover connecting rod and reciprocating pump are formed, be fixed on the shell, the structure of shell is: under the outer connecting pipe support ring is arranged, the support ring bottom connects outer seal ring, sealing drum, linear electric motor shell, and stator is arranged in the shell.
Trip out interior center device for center device in install the down-hole or from the down-hole, installing roof anchorage at heart has fishing head.The shape of fishing head is the cone that has circular groove.
The Fishable linear motor reciprocating pump shell is suspended on the oil pipe lower end.When pump detection and workover is installed, connect fishing head with wire rope or sucker rod by discharging tube, reciprocating pump and linear electric motor inner core one are removed the precalculated position, and seat is on the sealing drum of grappling seal arrangement, oil well pump just is fixed on the oil pipe by the grappling seal arrangement like this, and oil well pump is drained into liquid in the oil pipe and the liquid seal below the oil well pump is kept apart.When pump detection and workover plays pump, connect fishing head by basket barrel, reciprocating pump and linear electric motor inner core are tripped out from well together with wire rope or sucker rod.The stator of linear electric motor is stayed the down-hole, and certainly, cable need not trip out from the down-hole.
This device compared with prior art has tangible beneficial effect, and is as follows:
1., pump detection and workover do not need to trip out linear motor stator electric from the down-hole, do not need to trip out cable and oil pipe yet, reduced underground work workload and operating cost, avoided removing cable to the damage that cable causes, and reduced operation and maintenance cost.
2., oil well pump adopts the sucker rod pump structure, grappling, sealing are reliable, remove conveniently.
3., this device not only is adapted at straight well, and is adapted at using in the big oil well of directional well, oblique straight well, horizontal well and azimuthal variation.
4., thoroughly the reciprocating pump that has solved the puzzlement linear motor driving is used in oil recovery, and is the most scabrous when removing pump, must remove the difficult problem of cable.Apply in oil recovery for the linear electric motor reciprocating pump and to have captured technical barrier one.
5., the present invention has broken the reciprocating pump conventional construction of linear motor driving.For a long time, the position of power source linear electric motor can only be in the reciprocating pump upper end.The present invention to the reciprocating pump lower end, and has obtained beyond thought technological break-through with the position change of power source linear electric motor.
Description of drawings
Accompanying drawing 1 is a Fishable linear motor reciprocating pump overall structure generalized section.
Accompanying drawing 2 is Fishable linear motor reciprocating pump structural representations.Be the overall structure figure that interior center device is assembled into shell.
Accompanying drawing 3 is to discharge the barrel structure schematic representation.
Accompanying drawing 4 is basket barrel structural representations.
Accompanying drawing 5 is Fishable linear motor reciprocating pump heart apparatus structure schematic representation that linear motor rotor, mover connecting rod and reciprocating pump are formed.
Accompanying drawing 6 is Fishable linear motor reciprocating pump shell mechanism schematic representation.
1. sleeve pipe, 2. cable, 3. oil pipe, 4. centralizer, 5. anchoring device, 6. fishing head, 7. oil well pump, 8. grappling seal arrangement, 9. linear electric motor, 10. standing valve ball, 11. the pump housing, 12. plungers, 13. travelling valve balls, 14. pump barrels, 15. outer connecting pipes, 16. support ring, 17. spring detents, 18. inner seal rings, 19. outer seal rings, 20. interior sealing, 21. supporting sleeves, 22. little pump barrels, 23. sealing drums, 24. the linear electric motor shell, 25. mover connecting rods, 26. movers, 27. stators.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment: in Fig. 1,139.7 millimeters or 177.8 millimeters of sleeve pipe (1) external diameters are the indispensabilities in the oil well.88.9 millimeters of oil pipe (3) external diameters, 75.9 millimeters of internal diameters or 73 millimeters of external diameters, 62 millimeters of internal diameters, 1120 meters of length.Oil pipe (3) lower end connects Fishable linear motor reciprocating pump of the present invention.Cable (2) links to each other with linear motor stator electric (27) winding by the annular space between sleeve pipe (1) and the oil pipe (3), and drive motor mover (26) moves up and down.Fishable linear motor reciprocating pump of the present invention mainly divides 3 major parts on profile, reciprocating pump (7), grappling seal arrangement (8) and linear electric motor (9) part.Grappling seal arrangement (8) plays grappling and seal action in the centre of taking out reciprocating pump (7) and linear electric motor (9).Connect by hollow mover connecting rod (25) between the plunger of reciprocating pump (7) and the linear electric motor (9).Be connected the present invention and other correlation technique with reciprocating pump relatively, characteristics are the top of reciprocating pump (7) in linear electric motor (9).Because the inversion of the position of reciprocating pump (7) and linear electric motor (9), respective change has also taken place in each parts mechanism.
See Fig. 5: reciprocating pump: standing valve ball (10) and travelling valve ball (13) are arranged in the tubular pump housing (11), and standing valve is on travelling valve top.Plunger (12) is arranged in the tubular pump housing (11), and the external diameter of plunger (12) is less than pump housing internal diameter.Plunger (12) is slidingly matched with the pump housing (11), and the running length of plunger (12) is 1000 millimeters～6000 millimeters.Travelling valve ball (13) is arranged in the plunger (12).Plunger (12) bottom connects mover connecting rod (25).It is 20 millimeters～60 millimeters through hole that there is internal diameter at mover connecting rod (25) center.3～6 spiracles are arranged at the bottom of pump barrel (11), and the diameter of each spiracle is 20 millimeters～40 millimeters.
See Fig. 2: linear electric motor: stator (27) is made up of tube shaped electric machine shell, stator magnet iron core, stator coil, internal lining pipe.116 millimeters of stator (27) external diameters, 70 millimeters of internal diameters, 3000 millimeters～9000 millimeters of length.Mover is made by Nd-Fe-Bo permanent magnet material.69 millimeters of the mover of linear electric motor (26) external diameters, 3000 millimeters～6000 millimeters of length.
See Fig. 5: be evenly equipped with 4 compressing tablet formula spring detents (17) on mover connecting rod (25) outer wall between reciprocating pump and the linear motor rotor (27), inner seal ring (18), seal ring (20), supporting sleeve (21) are arranged.Cooperate fixing interior center device with sealing drum (23).
See Fig. 6: the structure of shell is: 100 millimeters of outer connecting pipe (15) internal diameters, outer connecting pipe (15) connects support ring (16) down, the bottom connects outer seal ring (19), sealing drum (20), linear electric motor shell (24), and stator (27) is arranged in the linear electric motor shell (24).30 millimeters～60 millimeters of linear electric motor shell (24) internal diameters, 3000 millimeters～6000 millimeters of length.
See Fig. 5: installing roof anchorage at heart has fishing head (6).The shape of fishing head (6) is the cone that has circular groove, 45 millimeters of diameters, 100 millimeters of height.The circular groove of fishing head (6) has two, 8 millimeters of width.
See Fig. 3: be that the connecting body that an energy is connected with fishing head (6) and can throws off discharges tube, interior center device be installed in the shell by discharging tube.
See Fig. 4: be the connecting body basket barrel that an energy is connected with fishing head (6) and can throws off, interior center device taken out in shell by basket barrel.
For reciprocating pump (7), the principle of its working principle and common reciprocating pump is basic identical.
When being connected with suitable electric current in stator (27) coil in the linear electric motor (9), motor stator (27) forms delegation ripple magnetic field, and this magnetic field interacts drive motor mover (26) to-and-fro motion with the permanent magnet that is fixed on the mover (27); The mover of linear electric motor (26) is made up of a center tube outer surface cover permanent magnet and retaining ring.Permanent magnet adopts the excellent especially permanent-magnet material of performance, retaining ring adopts good brass or the non-magnetic stainless steel of resistance magnetic property, center tube adopts the good high carbon steel pipe of magnetic property, this structure can improve magnetic intensity in the linear electric motor magnetic circuit greatly, thereby improves the electromagnetic force that unitary current produces.
Grappling seal arrangement (8) effect is: when linear electric motor (9) drive reciprocating pump (7) work, (liquid between 30 is given rise in the oil pipe (3) for sleeve pipe (1) and oil pipe, pressure in the oil pipe (3) is greater than the pressure between sleeve pipe (1) and the oil pipe (3), at the inside and outside formation pressure reduction of grappling seal arrangement (8), the piston that promotes grappling seal arrangement (8) outwards moves, make the anchor tooth of grappling seal arrangement (8) be close to sleeve pipe (1) inwall, oil pipe (3) can not upper and lowerly move under the anchor tooth anchorage force effect of grappling seal arrangement (8).If cable breaks down or other reason need play oil outlet tube (3) time, pull out reciprocating pump (7) and linear motor rotor (26) earlier, because at this moment oil, cover annular space are communicated with, oil, cover annular space and oil pipe (3) internal pressure balance, regain when the anchor tooth of anchoring device (8) is carried on oil pipe (3), tubing string just can trip out smoothly.Grappling seal arrangement (8) adopts prior art not to be described in detail here.
The process of installing and salvaging reciprocating pump (7) and linear motor rotor (26) is such: 1, salvage: when breaking down when maybe needing to trip out reciprocating pump (7), linear motor rotor underground components such as (26) in the down-hole, connect basket barrel (as Fig. 4) by wire rope or sucker rod, in oil pipe (3), be lowered to, drag for fishing head (6), oil well pump (7), linear motor rotor (26) are tripped out ground and keep in repair.After maintenance is good, connect release tube (as a Fig. 3) with wire rope or sucker rod again reciprocating pump (7) and linear motor rotor (26) are transferred to the precalculated position, at this moment, be connected the last outer seal ring (19) of oil pipe (3) and will support and the inner seal ring (18) that is connected on the device inner core (as Fig. 5), form double seal with seal ring (20).
Claims (6)
1, a kind of Fishable linear motor reciprocating pump, by cable (2), oil pipe (3), grappling seal arrangement (8), fishing head (6), reciprocating pump (7), linear electric motor (9) are formed, linear electric motor (9) are made up of stator (27) and mover (26), the critical piece of stator (27) is a coil, the critical piece of mover (26) is a permanent magnet, it is characterized in that: the mover of linear electric motor (26) is connected with reciprocating pump plunger (12) by mover connecting rod (25), the position of reciprocating pump (7) is on the top of linear electric motor (9), and the position of grappling seal arrangement (8) is between reciprocating pump (7) and linear electric motor (9).
2, a kind of Fishable linear motor reciprocating pump as claimed in claim 1, it is characterized in that: the feature of reciprocating pump (7) is: in the tubular pump housing (11) standing valve and travelling valve are arranged, standing valve is on travelling valve top, standing valve ball (10) is arranged in the standing valve, plunger (12) is arranged in the tubular pump housing (11), plunger (12) is slidingly matched with the pump housing (11), travelling valve ball (13) is arranged in the plunger (12), plunger (12) bottom connects mover connecting rod (25), and mover connecting rod (25) center is porose.
3, a kind of Fishable linear motor reciprocating pump as claimed in claim 1, it is characterized in that: linear motor stator electric (27) is made up of tube shaped electric machine shell (24), stator magnet iron core, stator coil, internal lining pipe, it is characterized in that: linear motor rotor (26) center is porose.
4, as claim 1 or 2 or 3 described a kind of Fishable linear motor reciprocating pumps, it is characterized in that: on mover connecting rod (25) outer wall between reciprocating pump (7) and the linear motor rotor (26) support ring (16) and spring detent (17) are arranged, cooperate fixing interior center device with sealing drum (23), also have seal ring (20) on mover connecting rod (25) outer wall.
5, as claim 1 or 2 or 3 described a kind of Fishable linear motor reciprocating pumps, it is characterized in that: the structure of shell is: support ring (16) is arranged under the outer connecting pipe (15), support ring (16) bottom connects outer seal ring (19), sealing drum (23), linear electric motor shell (24), and stator (27) is arranged in the shell (24).
6, as claim 1 or 2 or 3 described a kind of Fishable linear motor reciprocating pumps, it is characterized in that: installing roof anchorage at heart has fishing head (6), and the shape of fishing head (6) is the cone that has circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510085460XA CN100410535C (en) | 2005-07-21 | 2005-07-21 | Fishable linear motor reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510085460XA CN100410535C (en) | 2005-07-21 | 2005-07-21 | Fishable linear motor reciprocating pump |
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| Publication Number | Publication Date |
|---|---|
| CN1900521A true CN1900521A (en) | 2007-01-24 |
| CN100410535C CN100410535C (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510085460XA Expired - Fee Related CN100410535C (en) | 2005-07-21 | 2005-07-21 | Fishable linear motor reciprocating pump |
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| CN (1) | CN100410535C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132938A (en) * | 2012-12-21 | 2013-06-05 | 贵州航天凯山石油仪器有限公司 | Transmission device of intelligent casting-pulling instrument |
| CN103775033A (en) * | 2013-04-03 | 2014-05-07 | 中国石油天然气股份有限公司 | Immovable string lifting-up and putting-down linear motor drive electric submersible pump and method thereof |
| RU2520782C1 (en) * | 2013-04-25 | 2014-06-27 | Общество с ограниченной ответственностью "Конкистадор" | Electromagnetic borehole pump |
| CN103939056A (en) * | 2014-04-09 | 2014-07-23 | 中国石油天然气股份有限公司 | Oil well pump, oil extraction system of submersible linear motor well and working method of oil extraction system |
| RU2538377C2 (en) * | 2013-03-12 | 2015-01-10 | Анатолий Михайлович Санталов | Submersible linear electric motor |
| CN108361182A (en) * | 2018-01-08 | 2018-08-03 | 诸暨市超前泵业科技有限公司 | Underground reciprocating formula rodless pump |
| CN108915711A (en) * | 2018-06-28 | 2018-11-30 | 广东华隧建设集团股份有限公司 | A kind of cutter head of shield machine freezing pipeline jointing construction |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2343693B (en) * | 1998-11-10 | 2001-01-24 | Baker Hughes Inc | Well pump assembly |
| US20020050361A1 (en) * | 2000-09-29 | 2002-05-02 | Shaw Christopher K. | Novel completion method for rigless intervention where power cable is permanently deployed |
| US6863124B2 (en) * | 2001-12-21 | 2005-03-08 | Schlumberger Technology Corporation | Sealed ESP motor system |
| CN2535549Y (en) * | 2002-03-07 | 2003-02-12 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究 | Bidirectional anchoring packer |
| US6736880B2 (en) * | 2002-10-21 | 2004-05-18 | Pure Savers, Llc | Downhole gas/liquid separator system and method |
| CN2611586Y (en) * | 2003-03-26 | 2004-04-14 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Mechanical depth correcting device for underground pipe column |
| GB0314550D0 (en) * | 2003-06-21 | 2003-07-30 | Weatherford Lamb | Electric submersible pumps |
| CN1563715A (en) * | 2004-04-21 | 2005-01-12 | 王善政 | Electrical submersible, permanent-magnet straight reciprocating pump |
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2005
- 2005-07-21 CN CNB200510085460XA patent/CN100410535C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103132938A (en) * | 2012-12-21 | 2013-06-05 | 贵州航天凯山石油仪器有限公司 | Transmission device of intelligent casting-pulling instrument |
| RU2538377C2 (en) * | 2013-03-12 | 2015-01-10 | Анатолий Михайлович Санталов | Submersible linear electric motor |
| CN103775033A (en) * | 2013-04-03 | 2014-05-07 | 中国石油天然气股份有限公司 | Immovable string lifting-up and putting-down linear motor drive electric submersible pump and method thereof |
| CN103775033B (en) * | 2013-04-03 | 2017-02-08 | 中国石油天然气股份有限公司 | Immovable string lifting-up and putting-down linear motor drive electric submersible pump and method thereof |
| RU2520782C1 (en) * | 2013-04-25 | 2014-06-27 | Общество с ограниченной ответственностью "Конкистадор" | Electromagnetic borehole pump |
| CN103939056A (en) * | 2014-04-09 | 2014-07-23 | 中国石油天然气股份有限公司 | Oil well pump, oil extraction system of submersible linear motor well and working method of oil extraction system |
| CN103939056B (en) * | 2014-04-09 | 2016-01-06 | 中国石油天然气股份有限公司 | The oil extraction system of oil well pump, oil immersion line motor well and method of work thereof |
| CN108361182A (en) * | 2018-01-08 | 2018-08-03 | 诸暨市超前泵业科技有限公司 | Underground reciprocating formula rodless pump |
| CN108361182B (en) * | 2018-01-08 | 2023-08-15 | 诸暨市超前泵业科技有限公司 | Reciprocating rodless oil pump in pit |
| CN108915711A (en) * | 2018-06-28 | 2018-11-30 | 广东华隧建设集团股份有限公司 | A kind of cutter head of shield machine freezing pipeline jointing construction |
| CN108915711B (en) * | 2018-06-28 | 2020-02-21 | 广东华隧建设集团股份有限公司 | Shield constructs machine knife dish freezing pipeline connection structure |
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| CN100410535C (en) | 2008-08-13 |
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Effective date of registration: 20090731 Address after: Nanyang city of Henan province zip code: 473132 Co-patentee after: Henan Oilfield Engineering Consulting Corporation Patentee after: Petroleum Engineering Technology Research Institute, China Petroleum Chemical Co Henan Oilfield Company Address before: Nanyang city of Henan province zip code: 473132 Patentee before: Petroleum Engineering Technology Inst. Henan Oli Field Branch China Petrochemica |
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