CN201024946Y - A hydraulic diameter-varying bushing pressure expansion device - Google Patents
A hydraulic diameter-varying bushing pressure expansion device Download PDFInfo
- Publication number
- CN201024946Y CN201024946Y CNU2007200669764U CN200720066976U CN201024946Y CN 201024946 Y CN201024946 Y CN 201024946Y CN U2007200669764 U CNU2007200669764 U CN U2007200669764U CN 200720066976 U CN200720066976 U CN 200720066976U CN 201024946 Y CN201024946 Y CN 201024946Y
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- Prior art keywords
- swelling pressure
- pipe
- steel ball
- swelling
- casing
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- Expired - Fee Related
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- 230000008961 swelling Effects 0.000 claims abstract description 119
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 10
- 210000000664 rectum Anatomy 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003129 oil well Substances 0.000 abstract description 2
- 230000032258 transport Effects 0.000 abstract 2
- 230000007812 deficiency Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The utility model relates to a hydraulic changed diameter busing swelling pressure equipment for an oil gas well, which uses the change of hydraulic pressure to realize swelling so as to expend the inner diameter of a bushing. The utility model contains an under well swelling device, a hydraulic pump, a pressure pump and a conveying mechanism; wherein the pressure pump is connected to the hydraulic pump and transports liquid; the conveying mechanism transports the under well swelling device; wherein the under well swelling device is directly lowered to the deformation position of the bushing or the position needed to be patched by an oil pipe, which is formed by connecting a changed diameter swelling head, a pressure cylinder and a bushing anchor one by one, so as to control the bushing anchor to anchor or push and pull the swelling head; the oil pipe is connected to the bushing anchor first and then is connected to the pressure cylinder; and the oil pipe has a drip. The utility model has the advantages that: no need to be lowered in to a well along with a pipe column; reduce well building period; low in labor intensity; has no damage to the bushing; short in well building period; convenient and safe to be operated; small damage to deformed bushing; uneasy to scrub and damage the hard oil pipe; heavy bearing of an oil pipe; and overcomes the deficiency that impossible to operate an oil well more than 1000 meters.
Description
Technical field
The utility model relates to a kind of oil gas water well sleeve pipe swelling pressure equipment, and especially a kind of hydraulic diameter pipe swelling pressure equipment belongs to solution sleeve in oil field deformation technology.
Background technology
The oil gas water well down-hole casing in use because the corrosion, reasons such as crustal movement, regular meeting causes casing deformation, wearing and tearing, latus rectum diminishes, and oil-water well can't be worked.The technology that present casing swage is mainly taked is: pyriform apparatus shaping, milling, explosive shaping.The pyriform apparatus shaping technique is with tubing string pyriform apparatus to be arrived casing deformation place down, and with the sleeve pipe distending, the defective that its exists is that casing inner diameter is less than the standard latus rectum because shell-shaped deformation makes the sleeve pipe bounce-back of distending with the bump mode.The milling technology is that deformed casing is carried out grinding or milling, can damage sleeve pipe.The common defects that above-mentioned technology exists has been a lower tubular column, makes labor strength big.Explosive shaping is that explosive is arrived casing deformation place down, and explosive blasting is blown deformed casing, and its can damage sleeve pipe.
Applicant of the present utility model discloses a kind of hydraulic diameter pipe swelling pressure method and equipment thereof in the patent No. 200610023757.8, utilize hydraulic pressure to change the swelling pressure head of realizing reducing, place casing deformation or treat subsidy place, the action that makes the swelling pressure head expand, shrink realizes that the casing inner diameter behind the swelling pressure is not less than the standard latus rectum.This equipment is by down-hole swelling pressure device, the hydraulic pump that provides hydraulic pressure to change, being connected on the connecting gear of carrying the pressure pipe of liquid on the hydraulic pump and transporting the swelling pressure device forms, down-hole swelling pressure device directly is lowered into casing deformation or treats subsidy place by steel cable, from bottom to top in regular turn by reducing swelling pressure head, two-way hydraulic cylinder, the casing anchor composition that links together, wherein, a pressure pipe splicing sleeve anchor, two-way hydraulic cylinder has connected two and respectively the swelling pressure head has been played the pressure pipe that promotes and retract effect, when down-hole swelling pressure device is lowered into casing deformation or sleeve pipe and waits to subsidize the position, power fluid is fixed on the sleeve pipe casing anchor, two-way hydraulic cylinder promotes the distortion of reducing swelling pressure head under the effect of power fluid, distending deformed casing or subsidy pipe.When repairing well depth greater than the sleeve pipe in 1000 meters the well with this device, the pressure pipe cracky increases maintenance cost.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of expansion by the swelling pressure head, makes partly quick restorable hydraulic diameter pipe swelling pressure equipment of sleeve pipe reducing.
The scheme of the utility model technical solution problem is: a kind of hydraulic diameter pipe swelling pressure equipment, comprise by down-hole swelling pressure device, provide hydraulic pressure hydraulic pump that changes and the pressure pipe that is connected on conveying liquid on the hydraulic pump to form, wherein, described down-hole swelling pressure device directly is lowered into casing deformation or treats subsidy place by oil pipe, from bottom to top in regular turn by reducing swelling pressure head, pressurized cylinder, the casing anchor composition that links together, wherein, control casing anchor anchoring and to the swelling pressure head play promote with the oil pipe that retracts effect be connected with pressurized cylinder again after casing anchor is connected, oil pipe is provided with bleeder, and the effect of bleeder is to guarantee to guarantee that when retracting down-hole swelling pressure device oil can not leak and contaminated environment; When down-hole swelling pressure device was lowered into casing deformation or sleeve pipe and waits to subsidize the position, power fluid was anchored on the sleeve pipe casing anchor, and pressurized cylinder promotes reducing swelling pressure head reducing under the effect of power fluid, distending deformed casing or subsidy pipe.Realize the purpose of reparation fast.
Oil pipe is provided with safety joint, can guarantee that in case of emergency the top oil pipe is removed earlier.
Reducing swelling pressure head has the shell of conical nose, the shell external diameter equals the standard latus rectum, being arranged with from bottom to top between steel ball, steel ball in the centre has cushion block, the K that the steel ball circular row is distributed on steel ball is to side the place ahead and be limited in radially in the cylindrical hole, when deformed casing or subsidy pipe when stopping that the swelling pressure head advances, K to thrust make steel ball promote steel ball radially cylindrical hole move to centrifugal direction, steel ball stretches out direct swelling pressure deformed casing of shell or subsidy pipe place, when sleeve pipe or subsidy pipe can be smoothly behind swelling pressure during by swelling pressure head shell, in the steel ball withdrawal shell.
Steel ball is to be evenly equipped with several inclined-planes or the cylinder of open surface gradually.
Described cylinder and cushion block are as a whole.
Between the reducing swelling pressure head and pressurized cylinder in the swelling pressure device of down-hole, have, when running into casing buckling, look for passage automatically less than the freely swinging of right angle.
Current smooth and easy in sleeve pipe in order to guarantee the swelling pressure head, reducing swelling pressure head shell external diameter is greater than the external diameter of the other parts in the swelling pressure device of down-hole, and its length is greater than pressurized cylinder and casing anchor sum.
For the swelling pressure apparatus structure is firm, pressurized cylinder does not have swing with casing anchor and is connected, as methods of attachment such as spiral connections.
Described reducing swelling pressure head has the shell of conical nose, the shell external diameter equals the standard latus rectum, there is the compression spring conical nose top, heart position is evenly equipped with the cylinder of several ringlike inclined-plane or sphere or curved surface therein, cylinder and pull rope connect as one, the steel ball circular row is distributed on cylindrical K to side the place ahead and be limited in radially in the cylindrical hole, when the subsidy pipe stops that the swelling pressure head advances, pulling force overcomes the pressure of compression spring, cylindrical ring-type inclined-plane or sphere or curved surface promotion steel ball radially cylindrical hole move to centrifugal direction, steel ball stretches out the direct swelling pressure subsidy of shell sleeve pipe place, when the subsidy pipe can pass through swelling pressure head shell smoothly behind swelling pressure, the compression spring reset is in the steel ball withdrawal shell.
In order to make the swelling pressure head smooth and easy when current in sleeve pipe, the conical nose of described swelling pressure head is embedded with the bead of the usefulness that reduces to rub, and this bead is provided with most.
Superiority of the present invention is: utilize by hydraulic pressure to change expansion, the contractive action that realizes reducing swelling pressure head, the casing inner diameter behind the swelling pressure is not less than the standard latus rectum.Because of need not to go into the well together with tubing string, it is a lot of that the well workover duration is reduced, and labour intensity is low; Simultaneously, sleeve pipe there is not damage.Realize that the casing inner diameter behind the swelling pressure is not less than the standard latus rectum, the well workover duration is short, and is easy and safe to operate, little to the deformed casing infringement;
In addition, use hard system oil pipe instead and solved former pressure pipe and go into the well that easily friction is impaired in the back, and, overcome the defective that originally the dark oil well operation more than 1000 meters was difficult to realize because of the oil pipe load-bearing is big.
Description of drawings
Fig. 1 is the structural representation of the utility model device therefor.
Fig. 2 is the utility model reducing swelling pressure header structure schematic diagram.
Fig. 3 is the A-A cut-away view of accompanying drawing 2.
Fig. 4 is the another reducing swelling pressure of a utility model header structure schematic diagram.
Fig. 5 is the swelling pressure head schematic diagram that is embedded with bead.
Among the figure:
Among Fig. 1: swelling pressure head-1; Pressurized cylinder-2; Casing anchor-3; Pressure hose-4; Oil pipe-5; Sleeve pipe-6; Bleeder-7; Safety joint-8;
Fig. 2 is among Fig. 3: steel ball-11; Steel ball-12; Compression spring-13; Shell-14; Cushion block-15; Cylindrical hole-16;
Among Fig. 4: cylinder-17 ', steel ball-12 ', compression spring-13 ', shell-14 ', cylindrical hole-16 ';
Among Fig. 5: swelling pressure head-1 ', bead-18 '.
The specific embodiment
A kind of hydraulic diameter pipe swelling pressure equipment, thereby utilize hydraulic pressure change to realize swelling pressure expanded casing internal diameter, comprise by down-hole swelling pressure device, hydraulic pump that hydraulic pressure changes is provided, is connected on the connecting gear of carrying the pressure hose of liquid on the hydraulic pump and transporting the swelling pressure device and forms.
Embodiment 1
See also shown in the structural representation of Fig. 1 the utility model device therefor, described down-hole swelling pressure device directly is lowered into sleeve pipe 6 distortion or treats subsidy place by oil pipe 5, link together and form by reducing swelling pressure head 1, pressurized cylinder 2, casing anchor 3 in regular turn from bottom to top, wherein, control casing anchor 3 anchorings and to swelling pressure head 1 play promote with the oil pipe 5 that retracts effect be connected with pressurized cylinder 2 again after casing anchor 3 is connected, oil pipe 5 is provided with bleeder 7 and the safety joint 8 of controlling usefulness.The top of oil pipe 5 is connected with pressure hose 4.
When down-hole swelling pressure device was lowered into sleeve pipe 6 distortion or sleeve pipe and waits to subsidize the position, power fluid was anchored on the sleeve pipe casing anchor 3, and pressurized cylinder 2 promotes reducing swelling pressure head 1 reducing under the effect of power fluid, and distending deformed casing or subsidy are managed.
The effect of bleeder 7 is to guarantee to guarantee that when retracting down-hole swelling pressure device oil can not leak and contaminated environment, and safety joint 8 can guarantee that in case of emergency top oil pipe 5 is removed earlier.
Running into sleeve pipe 6 when crooked, adopt between reducing swelling pressure head 1 in the swelling pressure device of down-hole and the pressurized cylinder 2 to flexibly connect, can have less than the freely swinging of right angle, make the swelling pressure device can look for passage automatically.Pressurized cylinder 2 does not have swing with casing anchor 3 and is connected.
When the casing deformation section is longer, unclamp casing anchor 3, change-over switch is switched to " retracting " direction, make casing anchor 3 descending with pressurized cylinder 2.Repeat above-mentioned action then till the complete distending of deformed casing.
Reducing swelling pressure head 1, shown in Fig. 2 the utility model reducing swelling pressure header structure schematic diagram and Fig. 3 A-A cut-away view, it has the shell 14 of conical nose, there is compression spring 13 the conical nose top, be arranged with steel ball 11 from bottom to top in the centre, 11 of steel balls have cushion block 15, the K that steel ball 12 circular rows are distributed on steel ball 11 is to side the place ahead and be limited in radially in the cylindrical hole 16, when the sleeve pipe 6 of distortion stops that swelling pressure head 1 advances, K overcomes the pressure of compression spring 13 to thrust, steel ball 11 promotion steel balls 12 radially cylindrical hole 16 move to centrifugal direction, steel ball 12 stretches out shell 14 direct swelling pressure deformed casing places, when sleeve pipe 6 can pass through swelling pressure head shell 14 smoothly behind swelling pressure, compression spring 13 resets, in the steel ball 12 withdrawal shells 14.
Described cylinder and cushion block 15 can be as a whole.
Reducing swelling pressure head 1 shell external diameter is greater than the external diameter of the other parts in the swelling pressure device of down-hole, and its length is greater than pressurized cylinder 2 and casing anchor 3 sums.
Embodiment 2
Shown in the another reducing swelling pressure of Fig. 4 the utility model header structure schematic diagram, on the such scheme basis, the reducing swelling pressure head 1 ' of present embodiment has the shell 14 ' of conical nose, shell 14 ' external diameter equals the standard latus rectum of sleeve pipe, there is compression spring 13 ' the conical nose top, what heart position was evenly equipped with that several replace steel ball 12 ' therein has the inclined-plane or a cylinder 17 ' of open surface gradually, cylinder 17 ' connects as one with drawing bar, steel ball 12 ' circular row is distributed on the K of cylinder 17 ' to side the place ahead, and be limited in radially in the cylindrical hole 16 ', this swelling pressure head is particularly suitable for the subsidy pipe, when subsidizing pipe and stop that the swelling pressure head advances, pulling force overcomes the pressure of compression spring 13 ', the ring-type inclined-plane of cylinder 17 ' or sphere or curved surface promote steel ball 12 ' radially cylindrical hole 16 ' are to the centrifugal direction motion, and steel ball 12 ' stretches out shell 14 ' direct swelling pressure subsidy sleeve pipe place, when the subsidy pipe can pass through swelling pressure head shell 14 ' smoothly behind swelling pressure, compression spring 13 ' resets, in steel ball 12 ' the withdrawal shell.
In addition, shown in the swelling pressure head schematic diagram that Fig. 5 is embedded with bead, the conical nose of described swelling pressure head 1 ' is embedded with the steel ball 18 ' of the usefulness that reduces to rub.
Claims (10)
1. hydraulic diameter pipe swelling pressure equipment, realize swelling pressure expanded casing internal diameter thereby utilize hydraulic pressure to change, comprise by down-hole swelling pressure device, provide hydraulic pressure hydraulic pump that changes and the pressure pipe that is connected on conveying liquid on the hydraulic pump to form, it is characterized in that: described down-hole swelling pressure device directly is lowered into casing deformation or treats subsidy place by oil pipe, from bottom to top in regular turn by reducing swelling pressure head, pressurized cylinder, the casing anchor composition that links together, wherein, control casing anchor anchoring and to the swelling pressure head play promote with the oil pipe that retracts effect be connected with pressurized cylinder again after casing anchor is connected, oil pipe is provided with bleeder, when down-hole swelling pressure device is lowered into casing deformation or sleeve pipe and waits to subsidize the position, power fluid is anchored on the sleeve pipe casing anchor, pressurized cylinder promotes reducing swelling pressure head reducing under the effect of power fluid, distending deformed casing or subsidy pipe.
2. the equipment of hydraulic diameter pipe swelling pressure method according to claim 1, it is characterized in that: oil pipe is provided with safety joint, and this safety joint is located between oil pipe and the bleeder.
3. hydraulic diameter pipe swelling pressure equipment according to claim 1 and 2, it is characterized in that: described reducing swelling pressure head has the shell (14) of conical nose, the shell external diameter equals the standard latus rectum of sleeve pipe, be arranged with steel ball (11) from bottom to top in the centre, cushion block (15) is arranged between steel ball (11), the K that steel ball (12) circular row is distributed on steel ball (11) is to side the place ahead and be limited in radially in the cylindrical hole (16), when deformed casing or subsidy pipe when stopping that the swelling pressure head advances, K to thrust make steel ball (11) promote steel ball (12) radially cylindrical hole (16) move to centrifugal direction, steel ball (12) stretches out shell (14) directly swelling pressure deformed casing or subsidy pipe place, when sleeve pipe or subsidy pipe can be smoothly behind swelling pressure during by swelling pressure head shell (14), in steel ball (12) the withdrawal shell.
4. hydraulic diameter pipe swelling pressure equipment according to claim 3 is characterized in that: steel ball (11) is to be evenly equipped with several inclined-planes or the cylinder of open surface gradually.
5. hydraulic diameter pipe swelling pressure equipment according to claim 4, it is characterized in that: described cylinder and cushion block (15) are as a whole.
6. hydraulic diameter pipe swelling pressure equipment according to claim 1 and 2 is characterized in that: between the reducing swelling pressure head and pressurized cylinder in the swelling pressure device of down-hole, have less than the freely swinging of right angle, look for passage automatically when running into casing buckling.
7. hydraulic diameter pipe swelling pressure equipment according to claim 6 is characterized in that: reducing swelling pressure head shell external diameter is greater than the external diameter of the other parts in the swelling pressure device of down-hole, and its length is greater than pressurized cylinder and casing anchor sum.
8. the equipment that is used for hydraulic diameter pipe swelling pressure method according to claim 7 is characterized in that: pressurized cylinder does not have swing with casing anchor and is connected.
9. hydraulic diameter pipe swelling pressure equipment according to claim 1 and 2, it is characterized in that: described reducing swelling pressure head has the shell (14 ') of conical nose, the shell external diameter equals the standard latus rectum of sleeve pipe, there is compression spring (13 ') the conical nose top, heart position is evenly equipped with the cylinder (11 ') of several ringlike inclined-plane or sphere or curved surface therein, cylinder (11 ') connects as one with pull rope, the K that steel ball (12 ') circular row is distributed on cylinder (11 ') is to side the place ahead and be limited in radially in the cylindrical hole (16 '), when the subsidy pipe stops that the swelling pressure head advances, pulling force overcomes the pressure of compression spring (13 '), the ring-type inclined-plane of cylinder (11 ') or sphere or curved surface promotion steel ball (12 ') radially cylindrical hole (16 ') move to centrifugal direction, steel ball (12 ') stretches out directly swelling pressure subsidy sleeve pipe place of shell (14 '), when the subsidy pipe can pass through swelling pressure head shell when (14 ') smoothly behind swelling pressure, compression spring (13 ') resets, in steel ball (12 ') the withdrawal shell.
10. the equipment that is used for hydraulic diameter pipe swelling pressure method according to claim 9 is characterized in that: the conical nose of described swelling pressure head (1 ') is embedded with the bead (18 ') of the usefulness that reduces to rub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200669764U CN201024946Y (en) | 2007-02-02 | 2007-02-02 | A hydraulic diameter-varying bushing pressure expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200669764U CN201024946Y (en) | 2007-02-02 | 2007-02-02 | A hydraulic diameter-varying bushing pressure expansion device |
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| Publication Number | Publication Date |
|---|---|
| CN201024946Y true CN201024946Y (en) | 2008-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200669764U Expired - Fee Related CN201024946Y (en) | 2007-02-02 | 2007-02-02 | A hydraulic diameter-varying bushing pressure expansion device |
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| CN (1) | CN201024946Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015976A (en) * | 2013-01-16 | 2013-04-03 | 西南石油大学 | Test method for simulating restoration of deformation sleeve under stratum confining pressure |
| CN105569596A (en) * | 2015-12-14 | 2016-05-11 | 中国石油大学(华东) | Deformed casing repairing device |
| CN107269243A (en) * | 2017-05-22 | 2017-10-20 | 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 | A kind of oil pipe swollen footpath renovation technique with pressure |
| CN111636840A (en) * | 2020-06-24 | 2020-09-08 | 松原市永久石油技术服务有限公司 | Reducing rolling type expansion pipe column and using method thereof |
| CN113171888A (en) * | 2021-03-31 | 2021-07-27 | 唐山森普矿山装备有限公司 | Protection device and protection method for filter drum of centrifugal machine |
-
2007
- 2007-02-02 CN CNU2007200669764U patent/CN201024946Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015976A (en) * | 2013-01-16 | 2013-04-03 | 西南石油大学 | Test method for simulating restoration of deformation sleeve under stratum confining pressure |
| CN103015976B (en) * | 2013-01-16 | 2015-04-22 | 西南石油大学 | Test method for simulating restoration of deformation sleeve under stratum confining pressure |
| CN105569596A (en) * | 2015-12-14 | 2016-05-11 | 中国石油大学(华东) | Deformed casing repairing device |
| CN105569596B (en) * | 2015-12-14 | 2018-08-17 | 中国石油大学(华东) | A kind of deformed casing prosthetic device |
| CN107269243A (en) * | 2017-05-22 | 2017-10-20 | 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 | A kind of oil pipe swollen footpath renovation technique with pressure |
| CN111636840A (en) * | 2020-06-24 | 2020-09-08 | 松原市永久石油技术服务有限公司 | Reducing rolling type expansion pipe column and using method thereof |
| CN113171888A (en) * | 2021-03-31 | 2021-07-27 | 唐山森普矿山装备有限公司 | Protection device and protection method for filter drum of centrifugal machine |
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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: SHANGHAI JULONG OIL WORKOVER TECHONLOGY CO., LTD. Free format text: FORMER OWNER: LI XIAOYONG Effective date: 20100429 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200135 ROOM 1601, NO.3, LANE 1141, TAOLIN ROAD, SHANGHAI CITY TO: 201100 ROOM 1802, NO.2, LANE 58, XINJIAN EAST ROAD, MINXING DISTRICT, SHANGHAI CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100429 Address after: 201100, room 2, No. 58, Lane 1802, Xin Jian East Road, Shanghai, Minhang District Patentee after: Shanghai Julong oil Workover Technology Co., Ltd. Address before: 200135 Shanghai City Taolin Road No. 3 Lane 1141, room 1601 Patentee before: Li Xiaoyong |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20120202 |