EP0353309A4 - Method of constructing a well - Google Patents
Method of constructing a wellInfo
- Publication number
- EP0353309A4 EP0353309A4 EP19890901623 EP89901623A EP0353309A4 EP 0353309 A4 EP0353309 A4 EP 0353309A4 EP 19890901623 EP19890901623 EP 19890901623 EP 89901623 A EP89901623 A EP 89901623A EP 0353309 A4 EP0353309 A4 EP 0353309A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- τρub
- diameter
- diameτρa
- pipes
- drilling
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Definitions
- the present invention is not available: the tool, and the name is a method of building a well in the case of the complicated 5 drilling conditions.
- a method of borehole property has been known, including the drilling of a city mine, which involves the disposal of a waste of land.
- the positive pressures are balanced by the pressure of the outlet of the wash fluid, controlled by a change in its specific gravity.
- the friend and the friend at all pressure which does not allow for a slight increase in the weight gain.
- a well of convenience for productive area 5 is obtained in the case of a diminishing ability for the lower ones, and for its These members are, in combination with their functional purpose, simply called the annulant group of members of the clergy, the conduit, the interim and the ecumenical.
- Bu ⁇ enie s ⁇ vazhiny d ⁇ l ⁇ m ⁇ dn ⁇ g ⁇ diame ⁇ a ⁇ sle INSTALLS 5 ⁇ an ⁇ v ⁇ i na ⁇ avlyayuschey ⁇ l ⁇ nny ⁇ ub and ⁇ ndu ⁇ a ⁇ zv ⁇ lyae ⁇ s ⁇ ani ⁇ predetermined diame ⁇ s ⁇ vazhiny d ⁇ ⁇ e ⁇ n ⁇ y depth is ⁇ lyuchi ⁇ ⁇ mezhu ⁇ chnye ⁇ l ⁇ nny and sled ⁇ va ⁇ eln ⁇ , snizi ⁇ ma ⁇ e ⁇ ialnye za ⁇ a ⁇ y and us ⁇ i ⁇ s ⁇ i ⁇ els ⁇ v ⁇ s ⁇ vazhin.
- the number of accidents is reduced, so 10 as the area of complications cuts out immediately when it is taken into account that:
- P ⁇ i increases further SRI diame ⁇ a ⁇ iln ⁇ y ⁇ uby b ⁇ lee b% s ⁇ ivlyaem ⁇ s ⁇ its external collapsing pressure ⁇ vyshae ⁇ sya neznachi ⁇ eln ⁇ 35 and Koch ⁇ ⁇
- SRI diame ⁇ a ⁇ iln ⁇ y ⁇ uby b ⁇ lee b% s ⁇ ivlyaem ⁇ s ⁇ its external collapsing pressure ⁇ vyshae ⁇ sya neznachi ⁇ eln ⁇ 35 and Marshall ⁇ ⁇
- Fig. ⁇ depicts a part of the package used in accordance with the present invention
- Fig. 2 the bore of a well-shaped pipe that was let into it, the last part of which has an external diameter after it has been revealed is smaller than the diameter of the bore (section)
- Fig. 3 - I have a bad fortune with the installation of a complicated third-party site in the area of complication; ⁇ ig. 4 - section ⁇ - ⁇ on ⁇ ig.2; ⁇ ig.5 - cross section of the U-Y on ⁇ ig.2 ..
- the simplicity of the method is very similar to that of all the results of the drilling process, and it is true that
- the proposed method for building the property is to illustrate the following example.
- ⁇ s ⁇ ve ⁇ s ⁇ vii with ⁇ e ⁇ m on bu ⁇ enie s ⁇ vazh ⁇ sh, bu ⁇ enie ⁇ d na ⁇ avlyayuschuyu ⁇ l ⁇ nnu I ⁇ bsadny ⁇ ⁇ ub ( ⁇ ig. ⁇ d ⁇ l ⁇ m diame ⁇ m were 394 mm in depth and bm za ⁇ e ⁇ l ⁇ ⁇ bychnymn ⁇ bsadnymi ⁇ ubami with na ⁇ uzhnshl diame ⁇ m 324 mm.
- Za ⁇ em bu ⁇ enie ⁇ d ⁇ lzhili d ⁇ l ⁇ m diame ⁇ m The depth at 295 m ⁇ l Binu 300 m with a washable drilling rig.
- the ends of the middle pipe 4 in the area of the pit 7 provide the storage elements: 8 and connect the lower part 4 ⁇ 89/06739 ⁇ / 5 ⁇ 88 / 00234
- the intentional use of the invention may be used for industrial applications with an anomalous pressure vessel, and also may result in a loss of water.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Vending Machines For Individual Products (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU884366623A SU1679030A1 (en) | 1988-01-21 | 1988-01-21 | Method of pit disturbance zones isolation with shaped overlaps |
SU4366623 | 1988-01-21 | ||
PCT/SU1988/000234 WO1989006739A1 (en) | 1988-01-21 | 1988-11-22 | Method of constructing a well |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0353309A1 EP0353309A1 (en) | 1990-02-07 |
EP0353309A4 true EP0353309A4 (en) | 1991-05-08 |
EP0353309B1 EP0353309B1 (en) | 1997-02-05 |
Family
ID=21350919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89901623A Expired - Lifetime EP0353309B1 (en) | 1988-01-21 | 1988-11-22 | Method of constructing a well |
Country Status (13)
Country | Link |
---|---|
US (1) | US4976322A (en) |
EP (1) | EP0353309B1 (en) |
JP (1) | JP2530737B2 (en) |
CN (1) | CN1015808B (en) |
AU (1) | AU606777B2 (en) |
CA (1) | CA1301635C (en) |
DE (1) | DE3855787D1 (en) |
HU (1) | HUT57371A (en) |
IN (1) | IN170723B (en) |
MX (1) | MX171802B (en) |
NO (1) | NO300986B1 (en) |
SU (1) | SU1679030A1 (en) |
WO (1) | WO1989006739A1 (en) |
Families Citing this family (70)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5083608A (en) * | 1988-11-22 | 1992-01-28 | Abdrakhmanov Gabdrashit S | Arrangement for patching off troublesome zones in a well |
MY108743A (en) * | 1992-06-09 | 1996-11-30 | Shell Int Research | Method of greating a wellbore in an underground formation |
WO1995003476A1 (en) * | 1993-07-23 | 1995-02-02 | Tatarsky Gosudarstvenny Nauchno-Issledovatelsky I Proektny Institut Neftyanoi Promyshlennosti | Method of finishing wells |
US6085838A (en) * | 1997-05-27 | 2000-07-11 | Schlumberger Technology Corporation | Method and apparatus for cementing a well |
GB9714651D0 (en) | 1997-07-12 | 1997-09-17 | Petroline Wellsystems Ltd | Downhole tubing |
MY122241A (en) * | 1997-08-01 | 2006-04-29 | Shell Int Research | Creating zonal isolation between the interior and exterior of a well system |
US6029748A (en) * | 1997-10-03 | 2000-02-29 | Baker Hughes Incorporated | Method and apparatus for top to bottom expansion of tubulars |
US6021850A (en) * | 1997-10-03 | 2000-02-08 | Baker Hughes Incorporated | Downhole pipe expansion apparatus and method |
US6098717A (en) * | 1997-10-08 | 2000-08-08 | Formlock, Inc. | Method and apparatus for hanging tubulars in wells |
US6098710A (en) * | 1997-10-29 | 2000-08-08 | Schlumberger Technology Corporation | Method and apparatus for cementing a well |
GB9723031D0 (en) | 1997-11-01 | 1998-01-07 | Petroline Wellsystems Ltd | Downhole tubing location method |
US6354373B1 (en) | 1997-11-26 | 2002-03-12 | Schlumberger Technology Corporation | Expandable tubing for a well bore hole and method of expanding |
US6073692A (en) * | 1998-03-27 | 2000-06-13 | Baker Hughes Incorporated | Expanding mandrel inflatable packer |
US6263972B1 (en) | 1998-04-14 | 2001-07-24 | Baker Hughes Incorporated | Coiled tubing screen and method of well completion |
US6026900A (en) * | 1998-06-15 | 2000-02-22 | Keller; Carl E. | Multiple liner method for borehole access |
US7357188B1 (en) | 1998-12-07 | 2008-04-15 | Shell Oil Company | Mono-diameter wellbore casing |
US6745845B2 (en) | 1998-11-16 | 2004-06-08 | Shell Oil Company | Isolation of subterranean zones |
US6557640B1 (en) | 1998-12-07 | 2003-05-06 | Shell Oil Company | Lubrication and self-cleaning system for expansion mandrel |
US6604763B1 (en) | 1998-12-07 | 2003-08-12 | Shell Oil Company | Expandable connector |
US6712154B2 (en) | 1998-11-16 | 2004-03-30 | Enventure Global Technology | Isolation of subterranean zones |
US6823937B1 (en) | 1998-12-07 | 2004-11-30 | Shell Oil Company | Wellhead |
GB2343691B (en) | 1998-11-16 | 2003-05-07 | Shell Int Research | Isolation of subterranean zones |
US6640903B1 (en) | 1998-12-07 | 2003-11-04 | Shell Oil Company | Forming a wellbore casing while simultaneously drilling a wellbore |
US6634431B2 (en) | 1998-11-16 | 2003-10-21 | Robert Lance Cook | Isolation of subterranean zones |
US6575240B1 (en) | 1998-12-07 | 2003-06-10 | Shell Oil Company | System and method for driving pipe |
US6725919B2 (en) | 1998-12-07 | 2004-04-27 | Shell Oil Company | Forming a wellbore casing while simultaneously drilling a wellbore |
GB2344606B (en) | 1998-12-07 | 2003-08-13 | Shell Int Research | Forming a wellbore casing by expansion of a tubular member |
GB0224807D0 (en) | 2002-10-25 | 2002-12-04 | Weatherford Lamb | Downhole filter |
US6425444B1 (en) | 1998-12-22 | 2002-07-30 | Weatherford/Lamb, Inc. | Method and apparatus for downhole sealing |
EP1147287B1 (en) | 1998-12-22 | 2005-08-17 | Weatherford/Lamb, Inc. | Procedures and equipment for profiling and jointing of pipes |
AU770359B2 (en) * | 1999-02-26 | 2004-02-19 | Shell Internationale Research Maatschappij B.V. | Liner hanger |
US6415863B1 (en) | 1999-03-04 | 2002-07-09 | Bestline Liner System, Inc. | Apparatus and method for hanging tubulars in wells |
US6598677B1 (en) * | 1999-05-20 | 2003-07-29 | Baker Hughes Incorporated | Hanging liners by pipe expansion |
GB9921557D0 (en) | 1999-09-14 | 1999-11-17 | Petroline Wellsystems Ltd | Downhole apparatus |
EG22306A (en) | 1999-11-15 | 2002-12-31 | Shell Int Research | Expanding a tubular element in a wellbore |
US6325148B1 (en) | 1999-12-22 | 2001-12-04 | Weatherford/Lamb, Inc. | Tools and methods for use with expandable tubulars |
US6708769B2 (en) | 2000-05-05 | 2004-03-23 | Weatherford/Lamb, Inc. | Apparatus and methods for forming a lateral wellbore |
US6598678B1 (en) | 1999-12-22 | 2003-07-29 | Weatherford/Lamb, Inc. | Apparatus and methods for separating and joining tubulars in a wellbore |
US7121351B2 (en) * | 2000-10-25 | 2006-10-17 | Weatherford/Lamb, Inc. | Apparatus and method for completing a wellbore |
US7090025B2 (en) * | 2000-10-25 | 2006-08-15 | Weatherford/Lamb, Inc. | Methods and apparatus for reforming and expanding tubulars in a wellbore |
CA2428819A1 (en) * | 2001-01-03 | 2002-07-11 | Enventure Global Technology | Mono-diameter wellbore casing |
MXPA03008006A (en) * | 2001-03-09 | 2005-06-20 | Sumitomo Metal Ind | Steel pipe for use as embedded expanded pipe, and method of embedding oil-well steel pipe. |
US7172027B2 (en) | 2001-05-15 | 2007-02-06 | Weatherford/Lamb, Inc. | Expanding tubing |
US20080093089A1 (en) * | 2001-09-06 | 2008-04-24 | Enventure Global Technology | System for Lining a Wellbore Casing |
WO2004081346A2 (en) | 2003-03-11 | 2004-09-23 | Enventure Global Technology | Apparatus for radially expanding and plastically deforming a tubular member |
US7066284B2 (en) | 2001-11-14 | 2006-06-27 | Halliburton Energy Services, Inc. | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
GB0131019D0 (en) * | 2001-12-27 | 2002-02-13 | Weatherford Lamb | Bore isolation |
US6732806B2 (en) | 2002-01-29 | 2004-05-11 | Weatherford/Lamb, Inc. | One trip expansion method and apparatus for use in a wellbore |
AU2003230589A1 (en) | 2002-04-12 | 2003-10-27 | Enventure Global Technology | Protective sleeve for threaded connections for expandable liner hanger |
CA2482278A1 (en) | 2002-04-15 | 2003-10-30 | Enventure Global Technology | Protective sleeve for threaded connections for expandable liner hanger |
AU2003265452A1 (en) | 2002-09-20 | 2004-04-08 | Enventure Global Technology | Pipe formability evaluation for expandable tubulars |
US7886831B2 (en) | 2003-01-22 | 2011-02-15 | Enventure Global Technology, L.L.C. | Apparatus for radially expanding and plastically deforming a tubular member |
CA2523862C (en) | 2003-04-17 | 2009-06-23 | Enventure Global Technology | Apparatus for radially expanding and plastically deforming a tubular member |
US7213643B2 (en) * | 2003-04-23 | 2007-05-08 | Halliburton Energy Services, Inc. | Expanded liner system and method |
US7441606B2 (en) * | 2003-05-01 | 2008-10-28 | Weatherford/Lamb, Inc. | Expandable fluted liner hanger and packer system |
CA2471051C (en) | 2003-06-16 | 2007-11-06 | Weatherford/Lamb, Inc. | Borehole tubing expansion |
US7712522B2 (en) | 2003-09-05 | 2010-05-11 | Enventure Global Technology, Llc | Expansion cone and system |
US7308944B2 (en) | 2003-10-07 | 2007-12-18 | Weatherford/Lamb, Inc. | Expander tool for use in a wellbore |
WO2006020960A2 (en) | 2004-08-13 | 2006-02-23 | Enventure Global Technology, Llc | Expandable tubular |
GB2419148B (en) * | 2004-10-12 | 2009-07-01 | Weatherford Lamb | Methods and apparatus for manufacturing of expandable tubular |
CA2597909A1 (en) * | 2005-02-14 | 2006-08-24 | Enventure Global Technology, L.L.C. | Radial expansion of a wellbore casing against a formation |
CA2617498C (en) * | 2005-07-22 | 2014-09-23 | Weatherford/Lamb, Inc. | Apparatus and methods for creation of down hole annular barrier |
CA2555563C (en) | 2005-08-05 | 2009-03-31 | Weatherford/Lamb, Inc. | Apparatus and methods for creation of down hole annular barrier |
US9551201B2 (en) | 2008-02-19 | 2017-01-24 | Weatherford Technology Holdings, Llc | Apparatus and method of zonal isolation |
AU2009215521B2 (en) | 2008-02-19 | 2012-05-24 | Weatherford Technology Holdings, Llc | Expandable packer |
GB0823194D0 (en) * | 2008-12-19 | 2009-01-28 | Tunget Bruce A | Controlled Circulation work string for well construction |
US8360142B2 (en) * | 2009-06-15 | 2013-01-29 | Enventure Global Technology, Llc | High-ratio tubular expansion |
RU2471969C1 (en) * | 2011-07-08 | 2013-01-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Strengthening method of uncased part of well by means of range pipe expansion |
CN103161405B (en) * | 2013-03-03 | 2015-07-29 | 中国矿业大学 | Mine underground visits the casing off stratum crushing band method of putting high pressure karst water drilling construction |
US9453393B2 (en) | 2014-01-22 | 2016-09-27 | Seminole Services, LLC | Apparatus and method for setting a liner |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2237538A (en) * | 1939-02-25 | 1941-04-08 | John A Zublin | Swedge |
US2447629A (en) * | 1944-05-23 | 1948-08-24 | Richfield Oil Corp | Apparatus for forming a section of casing below casing already in position in a well hole |
US3134442A (en) * | 1958-10-27 | 1964-05-26 | Pan American Petroleum Corp | Apparatus for lining wells |
US3326293A (en) * | 1964-06-26 | 1967-06-20 | Wilson Supply Company | Well casing repair |
US4483399A (en) * | 1981-02-12 | 1984-11-20 | Colgate Stirling A | Method of deep drilling |
US4501327A (en) * | 1982-07-19 | 1985-02-26 | Philip Retz | Split casing block-off for gas or water in oil drilling |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2214226A (en) * | 1939-03-29 | 1940-09-10 | English Aaron | Method and apparatus useful in drilling and producing wells |
US3054455A (en) * | 1959-08-31 | 1962-09-18 | Keltner Haskell Owen | Tool for sealing a fissure along a mine shaft |
US3191677A (en) * | 1963-04-29 | 1965-06-29 | Myron M Kinley | Method and apparatus for setting liners in tubing |
SU907220A1 (en) * | 1980-05-21 | 1982-02-23 | Татарский Научно-Исследовательский И Проектныий Институт Нефтяной Промышленности | Method of setting a profiled closure in well |
SU1010252A1 (en) * | 1982-01-21 | 1983-04-07 | Полтавское Отделение Украинского Научно-Исследовательского Геологоразведочного Института Министерства Геологии Усср | Method of consolidating complicated zones of a well |
SU1008419A1 (en) * | 1982-02-25 | 1983-03-30 | Ивано-Франковский Институт Нефти И Газа | Device for local consolidation of well shaft |
-
1988
- 1988-01-21 SU SU884366623A patent/SU1679030A1/en active
- 1988-11-22 WO PCT/SU1988/000234 patent/WO1989006739A1/en active IP Right Grant
- 1988-11-22 US US07/423,418 patent/US4976322A/en not_active Expired - Lifetime
- 1988-11-22 AU AU29395/89A patent/AU606777B2/en not_active Ceased
- 1988-11-22 DE DE3855787T patent/DE3855787D1/en not_active Expired - Fee Related
- 1988-11-22 HU HU89982A patent/HUT57371A/en unknown
- 1988-11-22 EP EP89901623A patent/EP0353309B1/en not_active Expired - Lifetime
- 1988-11-22 JP JP1501552A patent/JP2530737B2/en not_active Expired - Lifetime
-
1989
- 1989-01-13 IN IN38/CAL/89A patent/IN170723B/en unknown
- 1989-01-20 CN CN89100302A patent/CN1015808B/en not_active Expired
- 1989-01-23 CA CA000588874A patent/CA1301635C/en not_active Expired - Lifetime
- 1989-01-23 MX MX014920A patent/MX171802B/en unknown
- 1989-09-19 NO NO893732A patent/NO300986B1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2237538A (en) * | 1939-02-25 | 1941-04-08 | John A Zublin | Swedge |
US2447629A (en) * | 1944-05-23 | 1948-08-24 | Richfield Oil Corp | Apparatus for forming a section of casing below casing already in position in a well hole |
US3134442A (en) * | 1958-10-27 | 1964-05-26 | Pan American Petroleum Corp | Apparatus for lining wells |
US3326293A (en) * | 1964-06-26 | 1967-06-20 | Wilson Supply Company | Well casing repair |
US4483399A (en) * | 1981-02-12 | 1984-11-20 | Colgate Stirling A | Method of deep drilling |
US4501327A (en) * | 1982-07-19 | 1985-02-26 | Philip Retz | Split casing block-off for gas or water in oil drilling |
Non-Patent Citations (1)
Title |
---|
See also references of WO8906739A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2939589A (en) | 1989-08-11 |
HUT57371A (en) | 1991-11-28 |
IN170723B (en) | 1992-05-09 |
HU890982D0 (en) | 1990-12-28 |
AU606777B2 (en) | 1991-02-14 |
US4976322A (en) | 1990-12-11 |
EP0353309A1 (en) | 1990-02-07 |
CN1034973A (en) | 1989-08-23 |
CA1301635C (en) | 1992-05-26 |
MX171802B (en) | 1993-11-15 |
NO893732L (en) | 1989-09-19 |
JPH02503097A (en) | 1990-09-27 |
NO300986B1 (en) | 1997-08-25 |
WO1989006739A1 (en) | 1989-07-27 |
EP0353309B1 (en) | 1997-02-05 |
NO893732D0 (en) | 1989-09-19 |
CN1015808B (en) | 1992-03-11 |
DE3855787D1 (en) | 1997-03-20 |
JP2530737B2 (en) | 1996-09-04 |
SU1679030A1 (en) | 1991-09-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19890925 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
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