CN1807830B - Hydraulic diameter-variable casing expansion method and apparatus therefor - Google Patents
Hydraulic diameter-variable casing expansion method and apparatus therefor Download PDFInfo
- Publication number
- CN1807830B CN1807830B CN 200610023757 CN200610023757A CN1807830B CN 1807830 B CN1807830 B CN 1807830B CN 200610023757 CN200610023757 CN 200610023757 CN 200610023757 A CN200610023757 A CN 200610023757A CN 1807830 B CN1807830 B CN 1807830B
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- Prior art keywords
- swelling pressure
- pressure head
- steel ball
- casing
- hole
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- Expired - Fee Related
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000008961 swelling Effects 0.000 claims description 109
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 239000002775 capsule Substances 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 210000000664 rectum Anatomy 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005422 blasting Methods 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
- 230000002950 deficient Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
- E21B43/105—Expanding tools specially adapted therefor
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a hydraulic diameter variable sheath expansion method and relative device which provides an oil-gas well sheath expansion technique, belonging to the technique for solving the deformation and hurt of oil field sheath. The inventive method comprises: using hydraulic change to realize the expansion head with variable diameter which is arranged at the deformation position or fixing position of said sheath; processing the expansion and retract motions of expansion head to make the inner diameter of sheath after expansion is not less than the standard diameter. And the relative method comprises: a under-well expansion device, a hydraulic pump for supplying the hydraulic change, a pressure-resistant tube connected on the hydraulic pump to transfer the liquid and a transmission device for transmitting the expansion device. The invention has the advantages that: the inner diameter after expansion is not less than the standard diameter, and it has short well maintenance time, easy operation, lower workload and little damage on the deformed sheath.
Description
Technical field
The present invention relates to a kind of oil gas water well sleeve pipe swelling pressure technology and equipment, especially a kind of hydraulic diameter pipe swelling pressure method and equipment thereof belong to sleeve in oil field distortion and the damage casing patching technology of solving.
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.
Summary of the invention
The objective of the invention is to: a kind of hydraulic diameter pipe swelling pressure method is provided,, the sleeve pipe reducing is partly restored to the original state fast by the expansion of swelling pressure head.
The present invention also provides a kind of swelling pressure device that uses in the swelling pressure method.
The object of the invention is achieved through the following technical solutions: a kind of hydraulic diameter pipe swelling pressure method, utilization changes the swelling pressure head of realizing reducing by hydraulic pressure, 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.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 labor strength and danger reduce a lot; Simultaneously, sleeve pipe there is not damage.
A kind of equipment that is used for above-mentioned hydraulic diameter pipe swelling pressure method comprises 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 down-hole swelling pressure device and forms.
Wherein, described down-hole swelling pressure device directly is lowered into casing deformation or treats subsidy place by steel cable, link together and form by reducing swelling pressure head, two-way hydraulic cylinder, casing anchor in regular turn from bottom to top, wherein, a pressure hose splicing sleeve anchor, two-way hydraulic cylinder have connected two and respectively the swelling pressure head have been played the pressure pipe that promotes and retract effect.
When down-hole swelling pressure device was lowered into casing deformation or waits to subsidize the position, power fluid was fixed on the sleeve pipe casing anchor, and two-way hydraulic cylinder promotes the distortion of reducing swelling pressure head under the effect of power fluid, distending deformed casing or subsidy pipe.Realize the purpose of reparation fast.
When running into casing buckling, between the reducing swelling pressure head and two-way hydraulic cylinder in the swelling pressure device of down-hole, and all have between two-way hydraulic cylinder and the casing anchor less than the freely swinging of right angle, can look for passage automatically.
Superiority of the present invention is: 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 to operate, and labor strength and dangerous little is little to the deformed casing infringement.
Description of drawings
The structural representation of accompanying drawing 1 device therefor of the present invention
Accompanying drawing 2 reducing swelling pressure header structure schematic diagrames.
The A-A cut-away view of accompanying drawing 3 accompanying drawings 3.
The reducing swelling pressure header structure schematic diagram of accompanying drawing 4 embodiment 2.
Among the figure:
Among Fig. 1:
Swelling pressure head-1; Two-way hydraulic cylinder-2; Casing anchor-3;
Pressure hose-4: pressure hose-4-1; High-pressure hose-4-2,4-3;
Buckle-5; Sleeve pipe-6; Well head-7; High-pressure pump-8; High-pressure pump-9; Cylinder-10;
Wire rope-11; Winch-12;
Among Fig. 2, Fig. 3:
First steel ball-1-1; Second steel ball-1-2; Compression spring-1-3; Swelling pressure head capsule body-1-4;
Cushion block-1-5; Cylindrical hole-1-6.
Among Fig. 4:
Several inclined-planes or the cylinder of open surface are gradually arranged--11 ', steel ball--12 ', the compression spring--13 ', reducing swelling pressure head capsule body--14 ', cylindrical hole--16 '.
The specific embodiment
A kind of hydraulic diameter pipe swelling pressure method is utilized by hydraulic pressure to change the swelling pressure head of realizing reducing, places casing deformation place, and 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.
Embodiment 1
At said method, the invention provides a kind of establishing of hydraulic diameter pipe swelling pressure method that be used for, comprise 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.Shown in the structural representation of Fig. 1 device therefor of the present invention, down-hole swelling pressure device directly is lowered into sleeve pipe 6 distortion place by steel cable 11, down-hole swelling pressure device is from bottom to top in regular turn by reducing swelling pressure head 1, two-way hydraulic cylinder 2, casing anchor 3 composition that links together, a pressure hose 4-1 splicing sleeve anchor 3, other two high-pressure hose 4-2,4-3 links to each other with two-way hydraulic cylinder 2 two ends, play the effect that promotes and retract swelling pressure head 1 respectively, when the ground change-over switch when " promotion " direction is switched, the output shaft of two-way hydraulic cylinder 2 promotes swelling pressure head 1 downwards, distending sleeve pipe 6 deformation sections recover the latus rectum of original sleeve pipe.Connecting gear is made up of the wire rope 11 that is connected with down-hole swelling pressure device of winch 12 and drive thereof.On wire rope 11 and pressure hose 4, establish one and play the buckle 5 of putting together and acting on, on the ground on the well head 7, the cylinder 10 of transmission mechanism and high-pressure pump 8, high-pressure pump 9 and coiling flexible pipe 4 is set.
When downhole hardware partly was lowered into sleeve pipe 6 deformation places, power fluid was anchored on the sleeve pipe 6 casing anchor 3, plays fixation.Two-way hydraulic cylinder 2 promotes 1 distortion of reducing swelling pressure head, distending deformed casing 6 under the effect of power fluid.
When running into casing buckling, between the reducing swelling pressure head 1 and two-way hydraulic cylinder 2 in the swelling pressure device of down-hole, and adopt between two-way hydraulic cylinder 2 and the casing anchor 3 and flexibly connect, can have less than the freely swinging of right angle, when running into casing buckling, make the swelling pressure device can look for passage automatically.
When the casing deformation section is longer, unclamp casing anchor 3, change-over switch is switched to " retracting " direction, make casing anchor descending with hydraulic cylinder.Repeat above-mentioned action then till the complete distending of deformed casing.After finishing above-mentioned task, ground winch 12 partly proposes well head 7 by wire rope 11 and three high-pressure hoses 4 with downhole hardware.
In in the past to the deformed casing shaping methods, because the elastic deformation effect, resilience all can take place in deformed casing, and internal diameter dwindles.Be head it off, a kind of reducing swelling pressure head 1 is provided in the present embodiment, shown in Fig. 2 reducing swelling pressure header structure schematic diagram and Fig. 3 A-A cut-away view, it has the swelling pressure head capsule body 1-4 of conical nose, the external diameter of swelling pressure head capsule body equals the standard latus rectum, there is compression spring 1-3 the conical nose top, be arranged with the first steel ball 1-1 from bottom to top in the centre, between the first steel ball 1-1 cushion block 1-5 is arranged, the K that the second steel ball 1-2 circular row is distributed on the first steel ball 1-1 is to side the place ahead and be limited in radially in the cylindrical hole 1-6, when deformed casing 6 stops that swelling pressure head 1 advances, K overcomes the pressure of compression spring 1-3 to thrust, the first steel ball 1-1 promote the second steel ball 1-2 radially cylindrical hole 1-6 move to centrifugal direction, the second steel ball 1-2 stretches out the direct swelling pressure deformed casing of swelling pressure head capsule body 1-4 place, when sleeve pipe can pass through swelling pressure head capsule body 1-4 smoothly behind swelling pressure, compression spring 1-3 resets, in the second steel ball 1-2 withdrawal swelling pressure head capsule body 1-4.
Structure to swelling pressure head 1 also can provide following improvement, and the first steel ball 1-1 is evenly equipped with several inclined-planes or the cylinder of open surface gradually.
Described cylinder and cushion block 1-5 can be as a whole.
Operating principle of the present invention is: when needs carry out swelling pressure to deformed casing, transmission mechanism utilizes wire rope together with three high-pressure hoses the downhole hardware part directly to be arrived casing deformation place down, high-pressure pump output highly pressurised liquid, enter the down-hole through three high-pressure hoses respectively, wherein one links to each other with casing anchor, highly pressurised liquid is anchored on the sleeve pipe casing anchor, plays fixation.Other two high-pressure hoses link to each other with the two-way hydraulic cylinder two ends, play the effect that promotes and retract the swelling pressure head respectively, when the ground change-over switch when " promotion " direction is switched, the output shaft of two-way hydraulic cylinder promotes the swelling pressure head downwards, the distending deformation section recovers the latus rectum of original sleeve pipe.When the casing deformation section is longer, unclamp casing anchor, change-over switch is switched to " retracting " direction, make casing anchor descending with hydraulic cylinder.Repeat above-mentioned action then till the complete distending of deformed casing.After finishing above-mentioned task, transmission mechanism partly proposes well head by wire rope and three high-pressure hoses with downhole hardware.
Embodiment 2
Shown in the reducing swelling pressure header structure schematic diagram of Fig. 4 present embodiment, on the such scheme basis, the present invention also provides a kind of equipment that is used for hydraulic diameter pipe swelling pressure method, described reducing swelling pressure head has the reducing swelling pressure head capsule body 14 ' of conical nose, the external diameter of reducing swelling pressure head capsule body 14 ' equals the standard latus rectum, there is compression spring 13 ' the conical nose top, heart position is evenly equipped with several inclined-planes or the cylinder 11 ' of open surface gradually therein, cylinder 11 ' connects as one with drawing bar, steel ball 12 ' circular row is distributed on the K of cylinder 11 ' 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 inclined-plane of cylinder 11 ' or gradually open surface promote steel ball 12 ' radially cylindrical hole 16 ' move to centrifugal direction, steel ball 12 ' stretches out reducing swelling pressure head capsule body 14 ' direct swelling pressure subsidy sleeve pipe place, when the subsidy pipe can be smoothly behind swelling pressure during by reducing swelling pressure head capsule body 14 ', compression spring 13 ' resets, in steel ball 12 ' the withdrawal reducing swelling pressure head capsule body 14 '.
Claims (6)
1. hydraulic diameter pipe swelling pressure method, utilize 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, change realization swelling pressure head reducing by hydraulic pressure, the swelling pressure head places the casing deformation of down-hole or treats subsidy place, the action that makes the swelling pressure head expand, shrink, the casing inner diameter of down-hole is not less than the standard latus rectum behind the realization swelling pressure, it is characterized in that:
Described down-hole swelling pressure device directly is lowered into the casing deformation of down-hole 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 hose splicing sleeve anchor, two-way hydraulic cylinder has connected two and respectively the swelling pressure head has been played the pressure hose that promotes and retract effect, when the swelling pressure device is lowered into the casing deformation of down-hole or waits to subsidize the position, power fluid is fixed on the sleeve pipe of down-hole casing anchor, two-way hydraulic cylinder promotes the distortion of reducing swelling pressure head under the effect of power fluid, distending distortion down-hole casing or subsidy pipe;
Described connecting gear is by winch, and the wire rope that is connected with down-hole swelling pressure device that drives is formed.
2. hydraulic diameter pipe swelling pressure method according to claim 1, it is characterized in that: between the reducing swelling pressure head and two-way hydraulic cylinder in the swelling pressure device of down-hole, and flexibly connect between two-way hydraulic cylinder and the casing anchor, all have less than the freely swinging of right angle, when running into casing buckling, look for passage automatically.
3. be used for the equipment that hydraulic diameter pipe swelling pressure method provides at claim 1 is described, it is characterized in that: described reducing swelling pressure head has the swelling pressure head capsule body (1-4) of conical nose, the external diameter of swelling pressure head capsule body equals the standard latus rectum, there is compression spring (1-3) the conical nose top, be arranged with first steel ball (1-1) from bottom to top in the centre, cushion block (1-5) is arranged between first steel ball (1-1), the K that second steel ball (1-2) circular row is distributed on first steel ball (1-1) is to side the place ahead and be limited in radially in the cylindrical hole (1-6), this K is to being swelling pressure head direction of advance, when deformed casing or subsidy pipe when stopping that the swelling pressure head advances, K overcomes the pressure of compression spring (1-3) to thrust, first steel ball (1-1) promotion second steel ball (1-2) radially cylindrical hole (1-6) moves to centrifugal direction, second steel ball (1-2) stretches out swelling pressure head capsule body (1-4) 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 capsule body (1-4), compression spring (1-3) resets, in second steel ball (1-2) the withdrawal shell.
4. according to claim 3ly be used for the equipment that hydraulic diameter pipe swelling pressure method provides, it is characterized in that: first steel ball (1-1) is to be evenly equipped with several inclined-planes or the cylinder of open surface gradually.
5. according to claim 4ly be used for the equipment that hydraulic diameter pipe swelling pressure method provides, it is characterized in that: (1-5) is as a whole for described cylinder and cushion block.
6. be used for the equipment that hydraulic diameter pipe swelling pressure method provides at claim 1 is described, it is characterized in that: described reducing swelling pressure head has the reducing swelling pressure head capsule body (14 ') of conical nose, the external diameter of reducing swelling pressure head capsule body (14 ') equals the standard latus rectum, there is compression spring (13 ') the conical nose top, heart position is evenly equipped with several inclined-planes or the cylinder (11 ') of open surface gradually therein, cylinder (11 ') is connected as a single entity with drawing bar, 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 '), this K is to being swelling pressure head direction of advance, when the subsidy pipe stops that the swelling pressure head advances, K overcomes the pressure of compression spring (13 ') to pulling force, the inclined-plane of cylinder (11 ') or gradually open surface promote steel ball (12 ') radially cylindrical hole (16 ') move to centrifugal direction, steel ball (12 ') stretches out directly swelling pressure subsidy sleeve pipe place of reducing swelling pressure head capsule body (14 '), when the subsidy pipe can pass through reducing swelling pressure head capsule body when (14 ') smoothly behind swelling pressure, compression spring (13 ') resets, in steel ball (12 ') the withdrawal reducing swelling pressure head capsule body (14 ').
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023757 CN1807830B (en) | 2006-02-06 | 2006-02-06 | Hydraulic diameter-variable casing expansion method and apparatus therefor |
| PCT/CN2007/000356 WO2007090338A1 (en) | 2006-02-06 | 2007-02-02 | A hydraulic diameter variable casing expansion method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023757 CN1807830B (en) | 2006-02-06 | 2006-02-06 | Hydraulic diameter-variable casing expansion method and apparatus therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807830A CN1807830A (en) | 2006-07-26 |
| CN1807830B true CN1807830B (en) | 2011-07-06 |
Family
ID=36839907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610023757 Expired - Fee Related CN1807830B (en) | 2006-02-06 | 2006-02-06 | Hydraulic diameter-variable casing expansion method and apparatus therefor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1807830B (en) |
| WO (1) | WO2007090338A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264996A (en) * | 2008-12-24 | 2011-11-30 | 国际壳牌研究有限公司 | Expanding a tubular element in a wellbore |
| CN101915226B (en) * | 2010-07-28 | 2013-08-07 | 孙秀本 | Novel gas-pressure liquid transfer machine |
| CN102305053B (en) * | 2011-08-28 | 2013-09-04 | 中国石油集团长城钻探工程有限公司 | Two-stage hydraulic reducing expansion tool |
| CN106567687A (en) * | 2015-10-12 | 2017-04-19 | 中石化石油工程技术服务有限公司 | Top-down expandable casing expansion method for deep well |
| CN112727394B (en) * | 2019-10-28 | 2023-01-13 | 中国石油化工股份有限公司 | Coiled tubing hydraulic workover string and method |
| CN110608007B (en) * | 2019-10-31 | 2023-06-20 | 西安石油大学 | Rotary push type hydraulic ball sleeve shaper |
| CN111636840B (en) * | 2020-06-24 | 2022-06-03 | 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 |
| CN116066001B (en) * | 2021-11-03 | 2024-04-26 | 中国石油天然气股份有限公司 | Hydraulic shaping method for sleeve-type well |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6702030B2 (en) * | 1998-12-22 | 2004-03-09 | Weatherford/Lamb, Inc. | Procedures and equipment for profiling and jointing of pipes |
| CN2617493Y (en) * | 2003-05-24 | 2004-05-26 | 杨铁军 | Multi-stage ball style pipe expander |
| CN2667146Y (en) * | 2003-11-17 | 2004-12-29 | 辽河石油勘探局 | Continuous casing expander for oil well reconditioning service |
| CN1676865A (en) * | 2005-05-12 | 2005-10-05 | 刘志洲 | Oil well casing reconditioning tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0220933D0 (en) * | 2002-09-10 | 2002-10-23 | Weatherford Lamb | Tubing expansion tool |
| US7182141B2 (en) * | 2002-10-08 | 2007-02-27 | Weatherford/Lamb, Inc. | Expander tool for downhole use |
-
2006
- 2006-02-06 CN CN 200610023757 patent/CN1807830B/en not_active Expired - Fee Related
-
2007
- 2007-02-02 WO PCT/CN2007/000356 patent/WO2007090338A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6702030B2 (en) * | 1998-12-22 | 2004-03-09 | Weatherford/Lamb, Inc. | Procedures and equipment for profiling and jointing of pipes |
| CN2617493Y (en) * | 2003-05-24 | 2004-05-26 | 杨铁军 | Multi-stage ball style pipe expander |
| CN2667146Y (en) * | 2003-11-17 | 2004-12-29 | 辽河石油勘探局 | Continuous casing expander for oil well reconditioning service |
| CN1676865A (en) * | 2005-05-12 | 2005-10-05 | 刘志洲 | Oil well casing reconditioning tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1807830A (en) | 2006-07-26 |
| WO2007090338A1 (en) | 2007-08-16 |
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