CN1402810A - Production valve - Google Patents
Production valve Download PDFInfo
- Publication number
- CN1402810A CN1402810A CN 00816458 CN00816458A CN1402810A CN 1402810 A CN1402810 A CN 1402810A CN 00816458 CN00816458 CN 00816458 CN 00816458 A CN00816458 A CN 00816458A CN 1402810 A CN1402810 A CN 1402810A
- Authority
- CN
- China
- Prior art keywords
- wellbore
- closure member
- branch
- wellbore system
- runner
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 12
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000003345 natural gas Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002343 natural gas well Substances 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0085—Adaptations of electric power generating means for use in boreholes
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Flow Control (AREA)
- Valve Housings (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Magnetically Actuated Valves (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A wellbore system formed in an earth formation including at least one hydrocarbon fluid reservoir, the wellbore system comprising a main wellbore and a plurality of branch wellbores, each branch wellbore extending from the main wellbore into the earth formation and providing fluid communication between said at least one hydrocarbon fluid reservoir and the main wellbore, each branch wellbore being provided with a production valve comprising anchoring means for fixedly anchoring the production valve in the branch wellbore and control means for controlling the flow rate of a stream of hydrocarbon fluid flowing from said at least one reservoir via the branch wellbore into the main wellbore.
Description
Technical field
The present invention relates to a kind of wellbore system, it is included in a main hole and a plurality of branch wellbore that gets out in the earth's crust rock stratum.Such wellbore system is commonly referred to as branch's formula wellbore system or is called many sides branch wellbore system.Should be noted that: in the context of the present invention, that section pit shaft that extends between the underground foundershaft tie point from ground is called as main hole, and other wellbore section then is called as branch wellbore.For example, if this wellbore system extends to vertical bore in certain reservoir of oil and gas and a tie point from the main hole by one section and extends to that one section branch wellbore in another reservoir forms, then the part of the vertical bore below tie point also is considered to one section branch wellbore, and the above vertical bore Duan Ze of tie point thinks main hole.
Background technology
In common many sides branch wellbore system, attempt controlling the produced quantity of well stream by a production valve that is arranged on pithead position place, main hole top always.But, adopt the incident problem of production valve that is arranged on the well head place to be: can not realize different reservoirs are optionally exploited.And if the fluid pressure in the wherein a certain reservoir is higher than the pressure of other reservoir, then will produce such problem: the hydrocarbon fluid in this high pressure reservoir can flow in the low pressure reservoir, rather than flows to well head.
Summary of the invention
Correspondingly, the objective of the invention is to design a kind of improved wellbore system, it can overcome the problem that occurs in the prior art.
According to the present invention, this paper proposes a kind of wellbore system that gets out in earth's crust rock stratum, this earth's crust rock stratum comprises the reservoir of at least one hydrocarbon-containiproducts fluid, this wellbore system comprises a main hole and a plurality of branch wellbore, each branch wellbore all extends to the described earth's crust rock stratum from main hole, and between described at least one reservoir and main hole, form fluid connecting relation, all be provided with a production valve in every section branch wellbore, this production valve comprises anchor device and control device, anchor device is used for production valve is anchored on branch wellbore regularly, and control device is used for flowing out from described at least one reservoir, the flow that flow into the hydrocarbon of main hole through this branch wellbore is controlled.
By production valve is set, realize control respectively to the hydrocarbon fluid flow of exploiting out from different branch wellbores in branch wellbore.In addition, the pressure of each production valve of flowing through can be fallen by this way and control: make that in the branch wellbore of correspondence the liquid well stream pressure of this production valve downstream part can prevent that fluid from flowing into another reservoir from a reservoir.
Description of drawings
Hereinafter with reference to the accompanying drawings, exemplarily the present invention is described in detail, in the accompanying drawings:
The schematically illustrated embodiment who is used in according to the production valve in the wellbore system of the present invention of Fig. 1;
The schematically illustrated first's details embodiment illustrated in fig. 1 of Fig. 2;
The schematically illustrated second portion details embodiment illustrated in fig. 1 of Fig. 3;
The schematically illustrated third part details embodiment illustrated in fig. 1 of Fig. 4;
The detailed structure of the schematically illustrated a kind of alternative generator of Fig. 5, this generator are used in a kind of remodeling embodiment embodiment illustrated in fig. 1; And
Fig. 6 is the generalized section of being done along the 6-6 line among Fig. 5;
The specific embodiment
Fig. 2 at length illustrates described controlled valve A, and it is symmetrical with respect to axis 8, wherein, will be at the upper portion of axis of symmetry 8, this controlled valve A illustrates by its open mode, and in the part of axis of symmetry 8 downsides, this controlled valve illustrates by its " shut " mode".Controlled valve A comprises a runner 10 and a closure member 12, closure member 12 wherein can move between an enable possition and a fastening position with respect to runner 10 in the axial direction, on the enable possition, closure member 12 makes runner open-minded, and on fastening position, 12 closed flows 10 of closure member.For this purpose, closure member 12 is provided with a frustoconical surface portion 14, when closure member is in the closed position, this frustoconical surface portion with contact hermetically around valve seat 16 runner 10, that have correspondingly-shaped.Runner 10 and two ingates 18 and an outlet 19 communicate, and this two ingate 18 is designed to like this: make when closure member 12 from its enable possition when fastening position moves, these two ingates are sealed gradually.On that end relative with frustoconical surface portion 14 that slotted-tube 20 is connected to closure member 12 at the one end, described slotted-tube then is provided with an annular convex shoulder 22 at its other end.A back-up ring 24 is set to described enclosure, and it is designed to, when the frustoconical surface portion 14 of closure member 12 and the distance between the valve seat 16 very hour, the annular convex shoulder 22 of pipe 20 contacts with back-up ring 24.Like this, when closure member 12 leaned on valve seat 16, pipe 20 just applied a pulling force to closure member 12, thereby it plays the effect of a spring part.An annular orifice 26 is set, so that 18 fluids that enter into shell 6 just flow to outlet opening 19 through this annular orifice 26 through the ingate in runner 10.A locking circle 28 that is threaded onto on the described shell is fixed these restriction choke 26 lockings.
Referring to Fig. 3, described driver module B is shown at length among the figure further, it comprises an electric stepper motor 30, and it has a driving shaft 32, has one first gear 34, the first gear drive on this driving shaft and one second gear 36.In the axial direction, have a tubular mandrel 38 to pass second gear 36, be shaped on the screw thread (not shown) that cooperatively interacts on the axle 38 and second gear 36, thereby when second gear 36 rotated, axle 38 will move in the axial direction.In shell, a guide pins 40 is installed by this way regularly: make this guide pins penetrate in the tubular mandrel 38, like this, when axially-movable takes place axle 38, can guide to it at axial direction by a fixed disk 42.Axle 38 is connected on the closure member 12 by suitable linkage (not shown) away from that end of fixed disk 42.This driver module B also comprises a cover control system 44, is provided with battery (not shown) and a microprocessor (not shown) that has acoustic sensor that a drive motor is used in this system.Microprocessor is provided with by programming in advance, thereby can control the work of stepper motor according to the received encoded acoustic signal of acoustic sensor.By four locking circle 46a, 46b, 46c, 46d each parts of driven unit B are locked in the shell 6.
Further referring to Fig. 4, generator C comprises a turbine, it has a casing member 48, this casing member is fixedly attached on the tube-like envelope 6 by connecting thread 50, an axle 52 passes from casing member 48 with one heart, this axle is installed in rotation in the ceramic bearing 53, and on this axle 52 and opposed that end of driver module B an impeller 54 is set.The other end place of axle 52 is provided with a thrust bearing 56, is used to prevent that axle 52 is with respect to the tubular shell axial motion.On axle 52, fixedly mount a plurality of magnet 58 with constant circumferential angular interval.A glass-sealed coil 60 is installed in casing member 48 regularly, and this coil loop is round each magnet 58, and coil is connected with described control system circuit, thereby when axle 52 rotated, coil 60 can charge to battery.
At a kind of alternative generator 60 shown in Fig. 5 and Fig. 6, this generator 60 can replace generator C and be installed in the production valve shown in Figure 1.This alternative generator 60 forms a fluidic generator, and it comprises a generator frame 62, and this body comprises an outer body part 62a and an inner body part 62b who is fixedly mounted among the outer body part 62a.Outer body part 62a is provided with connecting thread 64, is used for this generator 60 is screwed into shell 6, and is provided with a fluid cavity 66, and it has a fluid intake 68 and two fluid issuings 70,72 that bifurcated extends.A magnetic oscillator 74 is set in fluid cavity 66, it is leg-of-mutton support member 76 that this magnetic oscillator 74 is provided with two cross sections, each support member 76 all has an edge to put by this way to lean against in the groove (not shown): make oscillator 74 to produce angular oscillation with respect to described edge, groove wherein is in inner body part 62b.Like this, this oscillator just is divided into fluid cavity 66 two runner 66a, 66b along its two opposite sides.Article one, feedback runner 79 provides the fluid between runner 66a, 66b to be communicated with.Two electric coils 80,82 are set in outer body part 62a, these two coils surround magnetic oscillator 74, also be provided with the circuit connection (not shown) on the outer body part, be used for by this way coil 80,82 being connected in control system: when oscillator 74 when fluid cavity vibrates, coil 80,82 can charge to battery.
A production valve all is set on each branch wellbore, and the internal diameter difference of the annular orifice in different production valves, all production valves all are similar to production valve 1.Hereinafter will the selection of described different inner diameters be discussed at the normal operative condition of production valve 1.
In course of normal operation embodiment illustrated in fig. 1, natural gas is exploited out simultaneously from different reservoirs, thus, the natural gas well stream in each reservoir all flows in the main hole through separately branch wellbore, and flows to ground mining equipment (illustrating the figure) from main hole.Thereby different well streams can converge in main hole, thereby forms the main shaft stream that is tapped natural gas.The internal diameter of the restriction choke 26 in the different production valves 1 is selected to like this: make when each controlled valve A is in open mode, equate substantially at the air pressure of the different well streams of each restriction choke 26 downstream parts.So just can prevent to flow into the lower reservoir of another pressure from the natural gas that flow out the higher reservoir of a certain pressure.
If wish to tap natural gas from wellbore system with the flow of maximum, then the controlled valve A in each production valve 1 just remains under the open mode.Under this pattern, the gas of exploiting out flow in the runner 10 with maximum stream flow through ingate 18, and along with gas flows through impeller 54, impeller will rotate, and causes axle 52 and magnet 58 also to rotate.So just produce electric current in coil 60, this electric current flows to battery through control system, thereby it is charged.Because can not produce the situation of critical flow in the position at closure member 12 places, but air-flow reaches critical condition in restriction choke 26, so, the erosion of closure member 12 can not aggravated because air-flow crosses closure member 12 with the critical flow data rate stream.
If wish to reduce the gas production of certain or a plurality of branch wellbores, then in main sleeve pipe, produce an encoded acoustic signal, this signal representative makes closure member 12 move the instruction of one section selected distance in runner 10.Wherein the generation of acoustic signal for example can realize by impelling metal to clash into sound sequence of main sleeve pipe generation.This acoustic signal propagates into acoustic sensor through main sleeve pipe, branch casing 2 and lock mandrel 4, this sensor impels microprocessor that stepper motor 30 is controlled, thereby make driving shaft 32 rotate the selected number of turns, it is suitable that this rotates the required amount of movement of number of turns and closure member 12.The result is: second gear rotates, thereby axle 38 and closure member 12 are moved described selected distance in runner 10.So just partly cover discharge orifice 18, thereby gas can only be with flow 18 flow direction outlets 19 through the ingate that reduce.
If stop from certain branch wellbore, to tap natural gas, then this moment except the instruction of encoded acoustic signal representative be with closure member 12 move be pressed onto on shell 6 valve seats 16, performed process is identical with the process of above-mentioned reduction yield.The result is exactly that closure member 12 moves to the position that is pressed against on the valve seat 16, makes controlled valve A be in " shut " mode".Under this state, the annular convex shoulder 22 of slotted-tube 20 contacts with back-up ring 24, and manages 20 and apply a tension to closure member 12, and the effect of this pulling force is with the direction of closure member 12 biasings to the face of lifting off a seat 16.
If want to return to open mode again with closing valve module, then just in main sleeve pipe, produce an encoded acoustic signal, this signal representative moves to closure member 12 instruction of its enable possition.Closure member 12 is subjected to the promotion of slotted-tube 20 tension from the starting stage that its fastening position moves to its enable possition.
For remodeling embodiment embodiment illustrated in fig. 1, except electric current produce by alternative generator 60 rather than by generator C produce, its course of normal operation and course of normal operation embodiment illustrated in fig. 1 are similar.That is to say, the gas that enters into fluid cavity 66 through fluid intake 68 flows through runner 66a, 66b along oscillator 74, and the fluid issuing 70,72 of flowing through further, feedback conduit 79 can produce Coanda effect (Coanda) in runner 66a, 66b, make that air-flow is alternately to enter into outlet 70,72.Thereby, magnetic oscillator 74 just around the support edge of support member 76 along and angular oscillation takes place.So just produce electric current in coil 80,82, this electric current flows to battery through control system, and battery is charged.
Claims (13)
1. wellbore system that in earth's crust rock stratum, gets out, described rock stratum comprises at least one hydrocarbon fluid reservoir, described wellbore system comprises a main hole and a plurality of branch wellbore, each branch wellbore all extends to the described earth's crust rock stratum from main hole, and between described at least one reservoir and main hole, form fluid connecting relation, all be provided with a production valve in each branch wellbore, described production valve comprises anchor device and control device, anchor device is used for production valve is anchored on branch wellbore regularly, and control device is used for flowing out from described at least one reservoir, the flow that flow into the hydrocarbon well stream of main hole through this branch wellbore is controlled.
2. wellbore system according to claim 1, it is characterized in that, described production valve comprises a controlled valve and a critical flow jet pipe, and described controlled valve is used to regulate the flow of hydrocarbon well stream, and described critical flow jet pipe can be arranged so that well stream is from wherein flowing through.
3. wellbore system according to claim 2 is characterized in that described critical flow jet pipe is arranged on the downstream position of controllable valve.
4. according to claim 2 or 3 described wellbore systems, it is characterized in that described controlled valve comprises: a runner, it is used for making well stream to flow through from this runner; With a closure member, it can move on a selected direction with respect to runner, thereby covers described runner at least in part.
5. wellbore system according to claim 4, it is characterized in that, on described preferential direction, closure member can move between an enable possition and a fastening position, on the enable possition, closure member makes runner be in the state of opening basically, and on fastening position, closure member seals described runner.
6. according to claim 4 or 5 described wellbore systems, it is characterized in that described wellbore system also comprises: a driver module, it is used to control closure member motion in the selected direction.
7. wellbore system according to claim 6 is characterized in that, described driver module comprises a motor, and it is used to rotate a single mandrel, and described axle is designed to, and when axle is rotated, impels described closure member to move in the selected direction.
8. wellbore system according to claim 7, it is characterized in that described driver module also comprises a battery and a generator, described battery is used for powering to motor, and described generator is designed to and can be promoted by the hydrocarbon well stream, thereby described battery is charged.
9. wellbore system according to claim 8 is characterized in that, described generator can be selected from turbine and fluidic generator.
10. according to the described wellbore system of one of claim 6 to 9, it is characterized in that, described driver module comprises an acoustic sensor and a microprocessor, and described microprocessor is programmed to come the motion of described closure member is controlled according to the received encoded acoustic signal of sonic transducer.
11. wellbore system according to claim 10 is characterized in that, described anchor device comprises a lock mandrel, is used for production valve is locked at the sleeve pipe of branch wellbore, and described lock mandrel is suitable for described encoded acoustic signal is delivered to production valve from sleeve pipe.
12. according to each described wellbore system in the claim 1 to 11, it is characterized in that, described earth's crust rock stratum comprises described a plurality of hydrocarbon fluid reservoir with mutually different fluid pressure, and each branch wellbore all makes a corresponding hydrocarbon fluid reservoir be connected with main hole.
13. wellbore system, it is basically as preamble describes with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99204025.3 | 1999-11-29 | ||
| EP99204025 | 1999-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1402810A true CN1402810A (en) | 2003-03-12 |
Family
ID=8240929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00816458 Pending CN1402810A (en) | 1999-11-29 | 2000-11-28 | Production valve |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1234100B1 (en) |
| CN (1) | CN1402810A (en) |
| AU (1) | AU767007B2 (en) |
| BR (1) | BR0015949A (en) |
| CA (1) | CA2392117C (en) |
| DE (1) | DE60018202T2 (en) |
| EG (1) | EG22789A (en) |
| MX (1) | MXPA02005298A (en) |
| NO (1) | NO20022512L (en) |
| OA (1) | OA12102A (en) |
| RU (1) | RU2002117299A (en) |
| WO (1) | WO2001040624A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996280A (en) * | 2017-05-22 | 2017-08-01 | 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 presetting system adjustable choke |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9732587B2 (en) | 2013-01-22 | 2017-08-15 | Halliburton Energy Services, Inc. | Interval control valve with varied radial spacings |
| US10961819B2 (en) | 2018-04-13 | 2021-03-30 | Oracle Downhole Services Ltd. | Downhole valve for production or injection |
| US11702905B2 (en) | 2019-11-13 | 2023-07-18 | Oracle Downhole Services Ltd. | Method for fluid flow optimization in a wellbore |
| US11591886B2 (en) | 2019-11-13 | 2023-02-28 | Oracle Downhole Services Ltd. | Gullet mandrel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5868210A (en) * | 1995-03-27 | 1999-02-09 | Baker Hughes Incorporated | Multi-lateral wellbore systems and methods for forming same |
| US5762149A (en) * | 1995-03-27 | 1998-06-09 | Baker Hughes Incorporated | Method and apparatus for well bore construction |
| NO954352D0 (en) * | 1995-10-30 | 1995-10-30 | Norsk Hydro As | Device for flow control in a production pipe for production of oil or gas from an oil and / or gas reservoir |
| GB2320731B (en) * | 1996-04-01 | 2000-10-25 | Baker Hughes Inc | Downhole flow control devices |
-
2000
- 2000-11-28 RU RU2002117299/03A patent/RU2002117299A/en unknown
- 2000-11-28 CA CA002392117A patent/CA2392117C/en not_active Expired - Fee Related
- 2000-11-28 EP EP00989922A patent/EP1234100B1/en not_active Expired - Lifetime
- 2000-11-28 EG EG20001483A patent/EG22789A/en active
- 2000-11-28 OA OA1200200161A patent/OA12102A/en unknown
- 2000-11-28 WO PCT/EP2000/011993 patent/WO2001040624A2/en active IP Right Grant
- 2000-11-28 AU AU26705/01A patent/AU767007B2/en not_active Ceased
- 2000-11-28 DE DE60018202T patent/DE60018202T2/en not_active Expired - Fee Related
- 2000-11-28 CN CN 00816458 patent/CN1402810A/en active Pending
- 2000-11-28 BR BR0015949-2A patent/BR0015949A/en not_active IP Right Cessation
- 2000-11-28 MX MXPA02005298A patent/MXPA02005298A/en unknown
-
2002
- 2002-05-28 NO NO20022512A patent/NO20022512L/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996280A (en) * | 2017-05-22 | 2017-08-01 | 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 presetting system adjustable choke |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1234100B1 (en) | 2005-02-16 |
| EP1234100A2 (en) | 2002-08-28 |
| NO20022512L (en) | 2002-07-25 |
| MXPA02005298A (en) | 2002-12-13 |
| EG22789A (en) | 2003-08-31 |
| CA2392117C (en) | 2008-11-18 |
| DE60018202T2 (en) | 2006-02-16 |
| WO2001040624A2 (en) | 2001-06-07 |
| NO20022512D0 (en) | 2002-05-28 |
| AU2670501A (en) | 2001-06-12 |
| AU767007B2 (en) | 2003-10-30 |
| DE60018202D1 (en) | 2005-03-24 |
| BR0015949A (en) | 2002-08-20 |
| CA2392117A1 (en) | 2001-06-07 |
| WO2001040624A3 (en) | 2001-12-13 |
| RU2002117299A (en) | 2004-01-10 |
| OA12102A (en) | 2006-05-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |