CA2240290A1 - Drilling fluid loss prevention and lubrication additive - Google Patents
Drilling fluid loss prevention and lubrication additiveInfo
- Publication number
- CA2240290A1 CA2240290A1 CA002240290A CA2240290A CA2240290A1 CA 2240290 A1 CA2240290 A1 CA 2240290A1 CA 002240290 A CA002240290 A CA 002240290A CA 2240290 A CA2240290 A CA 2240290A CA 2240290 A1 CA2240290 A1 CA 2240290A1
- Authority
- CA
- Canada
- Prior art keywords
- drilling fluid
- fractures
- pores
- graphite
- fluid loss
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/16—Clay-containing compositions characterised by the inorganic compounds other than clay
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/003—Means for stopping loss of drilling fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/906—Solid inorganic additive in defined physical form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/91—Earth boring fluid devoid of discrete aqueous phase
Abstract
A method of preventing or controlling the loss of well drilling fluid into the pores and fractures of subterranean rock formations by the addition of resilient graphitic carbon particles to the drilling fluid in sufficient amounts to plug the pores and fractures. The graphitic carbon material reduces loss of circulation, lowers torque and drag, prevents casing wear while drilling, and provides a new method for the controlled release of graphite at extreme pressure. The material is non-toxic and imparts the well-known lubricating properties of graphite without contributing to surface sheen development under US EPA offshore cuttings discharge rules.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US865395P | 1995-12-15 | 1995-12-15 | |
US60/008,653 | 1995-12-15 | ||
PCT/US1996/019431 WO1997022677A1 (en) | 1995-12-15 | 1996-12-10 | Drilling fluid loss prevention and lubrication additive |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2240290A1 true CA2240290A1 (en) | 1997-06-26 |
CA2240290C CA2240290C (en) | 2005-06-28 |
Family
ID=21732888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002240290A Expired - Fee Related CA2240290C (en) | 1995-12-15 | 1996-12-10 | Drilling fluid loss prevention and lubrication additive |
Country Status (14)
Country | Link |
---|---|
US (1) | US5826669A (en) |
EP (1) | EP0866842B1 (en) |
AR (1) | AR004370A1 (en) |
AU (1) | AU1410297A (en) |
CA (1) | CA2240290C (en) |
CO (1) | CO4600753A1 (en) |
DE (1) | DE69632831T2 (en) |
DK (1) | DK0866842T3 (en) |
DZ (1) | DZ2143A1 (en) |
EA (1) | EA000357B1 (en) |
EG (1) | EG21132A (en) |
NO (1) | NO314591B2 (en) |
SA (1) | SA97170710B1 (en) |
WO (1) | WO1997022677A1 (en) |
Families Citing this family (79)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7267291B2 (en) * | 1996-07-24 | 2007-09-11 | M-I Llc | Additive for increasing the density of an oil-based fluid and fluid comprising such additive |
US6786153B2 (en) * | 2002-09-19 | 2004-09-07 | Interflex Laser Engravers, Llc | Printing rolls having wear indicators and methods for determining wear of printing and anilox rolls and sleeves |
GB2315505B (en) * | 1996-07-24 | 1998-07-22 | Sofitech Nv | An additive for increasing the density of a fluid and fluid comprising such additve |
US20030203822A1 (en) * | 1996-07-24 | 2003-10-30 | Bradbury Andrew J. | Additive for increasing the density of a fluid for casing annulus pressure control |
US7220707B2 (en) * | 2004-06-03 | 2007-05-22 | M-I L.L.C. | Sized barite as a weighting agent for drilling fluids |
US6152227A (en) * | 1997-10-24 | 2000-11-28 | Baroid Technology, Inc. | Drilling and cementing through shallow waterflows |
CA2241621A1 (en) * | 1998-06-26 | 1999-12-26 | National Silicates Ltd. | A lubricating method for silicate drilling fluids |
DE19937920A1 (en) * | 1999-08-11 | 2001-03-01 | Flowtex Technologie Gmbh & Co | Method and device for trenchless installation of external current anodes for cathodic corrosion protection |
US6806232B1 (en) | 2001-05-31 | 2004-10-19 | Steve Cart | Composition of drilling fluids comprising ground elastomeric crumb rubber material and a method of decreasing seepage and whole mud loss using such composition |
US7066285B2 (en) * | 2002-01-16 | 2006-06-27 | Halliburton Energy Services, Inc. | Method and composition for preventing or treating lost circulation |
US6821931B2 (en) * | 2002-03-05 | 2004-11-23 | Alpine Mud Products Corporation | Water-based drilling fluid additive containing talc and carrier |
US6861392B2 (en) * | 2002-03-26 | 2005-03-01 | Halliburton Energy Services, Inc. | Compositions for restoring lost circulation |
US6739414B2 (en) * | 2002-04-30 | 2004-05-25 | Masi Technologies, L.L.C. | Compositions and methods for sealing formations |
US7056867B2 (en) * | 2002-07-17 | 2006-06-06 | Alpine Mud Products Corp | Drilling fluid additive system containing graphite and carrier |
US7060660B2 (en) * | 2002-07-17 | 2006-06-13 | Alpine Mud Products Corp | Drilling fluid additive system containing talc and graphite |
US6889780B2 (en) * | 2002-12-31 | 2005-05-10 | Halliburton Energy Services, Inc. | Method for drilling depleted sands with minimal drilling fluid loss |
US7482309B2 (en) * | 2003-11-24 | 2009-01-27 | Halliburton Energy Services, Inc. | Methods of drilling wellbores using variable density fluids comprising coated elastic particles |
US20040171499A1 (en) * | 2003-01-24 | 2004-09-02 | Halliburton Energy Services, Inc. | Cement compositions with improved mechanical properties and methods of cementing in a subterranean formation |
US7543642B2 (en) * | 2003-01-24 | 2009-06-09 | Halliburton Energy Services, Inc. | Cement compositions containing flexible, compressible beads and methods of cementing in subterranean formations |
US7087555B2 (en) * | 2003-04-07 | 2006-08-08 | Baker Hughes Incorporated | Drilling fluids comprising sized graphite particles |
US20060122070A1 (en) * | 2003-04-07 | 2006-06-08 | Baker Hughes Incorporated | Drilling fluid systems comprising sized graphite particles |
EP1892278A1 (en) * | 2003-04-07 | 2008-02-27 | Baker Hughes Incorporated | Drilling fluids comprising sized graphite particles |
US7977281B2 (en) * | 2003-04-07 | 2011-07-12 | Baker Hughes Incorporated | Methods for minimizing the amount of graphite particles used during drilling operations |
US7376148B1 (en) * | 2004-01-26 | 2008-05-20 | Cisco Technology, Inc. | Method and apparatus for improving voice quality in a packet based network |
US20050205834A1 (en) * | 2004-01-29 | 2005-09-22 | Matula Gary W | Composition and method for dissipating heat underground |
US7452417B2 (en) | 2004-01-29 | 2008-11-18 | Halliburton Energy Services, Inc. | Downhole servicing compositions having high thermal conductivities and methods of using the same |
US7067004B2 (en) * | 2004-01-29 | 2006-06-27 | Halliburton Energy Services, Inc. | Grout compositions having high thermal conductivities and methods of using the same |
US9206084B2 (en) | 2004-01-29 | 2015-12-08 | Halliburton Energy Services, Inc. | Composition and method for dissipating heat underground |
US7607483B2 (en) * | 2004-04-19 | 2009-10-27 | Halliburton Energy Services, Inc. | Sealant compositions comprising colloidally stabilized latex and methods of using the same |
WO2007145735A2 (en) | 2006-06-07 | 2007-12-21 | Exxonmobil Upstream Research Company | Method for fabricating compressible objects for a variable density drilling mud |
US8088716B2 (en) | 2004-06-17 | 2012-01-03 | Exxonmobil Upstream Research Company | Compressible objects having a predetermined internal pressure combined with a drilling fluid to form a variable density drilling mud |
US7201228B2 (en) * | 2004-08-30 | 2007-04-10 | Halliburton Energy Services, Inc. | Freer flowing liquid-solid suspensions and methods of use in subterranean formations |
GB2419146B (en) * | 2004-10-14 | 2007-03-28 | Mi Llc | Lost circulation additive for drilling fluids |
US7284611B2 (en) * | 2004-11-05 | 2007-10-23 | Halliburton Energy Services, Inc. | Methods and compositions for controlling lost circulation in subterranean operations |
US20070111901A1 (en) * | 2005-11-11 | 2007-05-17 | Reddy B R | Method of servicing a wellbore with a sealant composition comprising solid latex |
US7488705B2 (en) * | 2004-12-08 | 2009-02-10 | Halliburton Energy Services, Inc. | Oilwell sealant compositions comprising alkali swellable latex |
US20070111900A1 (en) * | 2005-11-11 | 2007-05-17 | Reddy B R | Sealant compositions comprising solid latex |
CA2598123C (en) * | 2005-02-22 | 2013-11-12 | M-I L.L.C. | Additive for reducing torque on a drill string |
BRPI0607830A2 (en) * | 2005-02-25 | 2009-10-06 | Superior Graphite Co | graphite coating of particulate materials |
US7264053B2 (en) * | 2005-03-24 | 2007-09-04 | Halliburton Energy Services, Inc. | Methods of using wellbore servicing fluids comprising resilient material |
US20060217270A1 (en) * | 2005-03-24 | 2006-09-28 | Halliburton Energy Services, Inc. | Wellbore servicing fluids comprising resilient material |
US7501019B2 (en) * | 2005-03-31 | 2009-03-10 | Chevron U.S.A., Inc. | Granular solid wax particles |
US7629297B2 (en) * | 2005-04-26 | 2009-12-08 | Mano Shaarpour | Lost circulation composition |
US7913757B2 (en) * | 2005-09-16 | 2011-03-29 | Halliburton Energy Services. Inc. | Methods of formulating a cement composition |
US7776797B2 (en) * | 2006-01-23 | 2010-08-17 | Halliburton Energy Services, Inc. | Lost circulation compositions |
US8132623B2 (en) * | 2006-01-23 | 2012-03-13 | Halliburton Energy Services Inc. | Methods of using lost circulation compositions |
WO2007095009A2 (en) * | 2006-02-10 | 2007-08-23 | Nash, Kenneth, L. | Methods and compositions for sealing fractures, voids, and pores of subterranean rock formations |
EP2038364A2 (en) | 2006-06-07 | 2009-03-25 | ExxonMobil Upstream Research Company | Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud |
EP2041235B1 (en) | 2006-06-07 | 2013-02-13 | ExxonMobil Upstream Research Company | Compressible objects combined with a drilling fluid to form a variable density drilling mud |
US20080060811A1 (en) * | 2006-09-13 | 2008-03-13 | Halliburton Energy Services, Inc. | Method to control the physical interface between two or more fluids |
CN101680278A (en) * | 2007-05-15 | 2010-03-24 | 国际壳牌研究有限公司 | System for drilling a wellbore |
GB0711621D0 (en) * | 2007-06-18 | 2007-07-25 | 3M Innovative Properties Co | Additive to reduce fluid loss for drilling fluids |
US20090075847A1 (en) * | 2007-09-14 | 2009-03-19 | Wawrzos Frank A | Drilling fluid lubricant and method of use |
US8043997B2 (en) * | 2008-02-29 | 2011-10-25 | Halliburton Energy Services Inc. | Lost circulation material formulation and method of use |
CN102216415B (en) | 2008-08-12 | 2013-11-06 | 路易斯安那州大学及农业和机械学院管理委员会 | Thermoplastic cellulosic fiber blends as lost circulation materials |
DE102008052417A1 (en) | 2008-10-21 | 2010-04-22 | Sasse, Heiko, Dipl.-Ing. | Closed probe system for use with geothermal energy, particularly terrestrial heat from large depths, comprises sunk bore and probe tube arranged for transporting fluid heat transfer medium |
US20100212892A1 (en) * | 2009-02-26 | 2010-08-26 | Halliburton Energy Services, Inc. | Methods of formulating a cement composition |
US7792250B1 (en) | 2009-04-30 | 2010-09-07 | Halliburton Energy Services Inc. | Method of selecting a wellbore cement having desirable characteristics |
US8530393B2 (en) | 2011-04-15 | 2013-09-10 | Halliburton Energy Services, Inc. | Methods to characterize fracture plugging efficiency for drilling fluids |
US8887806B2 (en) | 2011-05-26 | 2014-11-18 | Halliburton Energy Services, Inc. | Method for quantifying cement blend components |
US9366098B2 (en) | 2012-02-02 | 2016-06-14 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Engineering plastic / inorganic fiber blends as lost circulation materials |
CA2768538A1 (en) * | 2012-02-16 | 2013-08-16 | Shannon Keith Latimer | Fill material dispensing method and apparatus |
CA2878168A1 (en) * | 2012-07-09 | 2014-01-16 | Schlumberger Canada Limited | Methods for servicing subterranean wells |
US9388333B2 (en) | 2012-07-11 | 2016-07-12 | Halliburton Energy Services, Inc. | Methods relating to designing wellbore strengthening fluids |
US8999898B2 (en) | 2013-03-15 | 2015-04-07 | Superior Graphite Co. | Drilling fluid additive for loss circulation and wellbore strengthening |
US9688901B2 (en) * | 2013-07-05 | 2017-06-27 | James Blair Fontenot | Lost circulation drilling fluids comprising elastomeric rubber particles and a method for decreasing whole mud loss using such composition |
CN103571441B (en) * | 2013-10-11 | 2017-03-15 | 四川康克石油科技有限公司 | A kind of drilling fluid Wear-resistant drag reducer and preparation method thereof |
CN103710015B (en) * | 2013-12-25 | 2016-08-17 | 四川宝麟新材料科技有限公司 | A kind of oil gas field volume increase emulsion-type drag reducer and preparation method thereof |
US9458703B2 (en) | 2013-12-26 | 2016-10-04 | Superior Graphite Co. | Compressible carbonaceous particulate material and method of making same |
BR112017001296A2 (en) * | 2014-07-21 | 2018-03-13 | Baker Hughes Inc | electrically conductive oil based fluids |
WO2016093832A1 (en) * | 2014-12-11 | 2016-06-16 | Halliburton Energy Services, Inc. | Resilient carbon-based materials as lost circulation materials and related methods |
WO2016164399A1 (en) | 2015-04-06 | 2016-10-13 | Superior Graphite Co. | Cement composition including compressible carbon fraction |
US9845423B2 (en) | 2015-04-29 | 2017-12-19 | Halliburton Energy Services, Inc. | Grout fluids for use in a geothermal well loop |
US20160326423A1 (en) * | 2015-05-04 | 2016-11-10 | Baker Hughes Incorporated | Downhole fluid compositions and methods of using carbon black particles |
WO2017065778A1 (en) * | 2015-10-15 | 2017-04-20 | Halliburton Energy Services, Inc. | Diverter fluid |
CN105623631B (en) * | 2016-02-20 | 2018-05-04 | 西南石油大学 | Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage |
US11319760B2 (en) | 2019-12-18 | 2022-05-03 | Saudi Arabian Oil Company | Swellable lost circulation material and methods of manufacturing and using the same |
WO2023141379A1 (en) * | 2022-01-21 | 2023-07-27 | ExxonMobil Technology and Engineering Company | Lost circulation fluids and methods related thereto |
CN115386348B (en) * | 2022-09-14 | 2023-11-14 | 中国石油大学(华东) | Ultra-deep oil and gas reservoir salt induced self-agglomeration modified nano graphite and preparation method, regulation and control system and application method thereof |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2667224A (en) * | 1949-06-29 | 1954-01-26 | Stanolind Oil & Gas Co | Well completion process |
US2912380A (en) * | 1953-07-17 | 1959-11-10 | American Viscose Corp | Drilling fluids and method of preventing loss thereof from well holes |
US3385789A (en) * | 1964-03-05 | 1968-05-28 | Charles M. King | Composition and method for shale control |
US3444276A (en) * | 1966-04-04 | 1969-05-13 | Dow Chemical Co | Method for producing carbon-bonded graphite structures |
US3807961A (en) * | 1970-02-24 | 1974-04-30 | Superior Graphite Co | Apparatus for high-temperature treatment of petroleum coke |
CA1091895A (en) * | 1975-07-01 | 1980-12-23 | William M. Goldberger | Method and apparatus for heat treating carbonaceous material in a fluidized bed |
US4088583A (en) * | 1976-12-02 | 1978-05-09 | Union Oil Company Of California | Composition and method for drilling high temperature reservoirs |
US4123367A (en) * | 1977-04-29 | 1978-10-31 | Dodd Anita A | Method of reducing drag and rotating torque in the rotary drilling of oil and gas wells |
US4531594A (en) * | 1982-10-25 | 1985-07-30 | Venture Chemicals, Inc. | Method and compositions for fluid loss and seepage loss control |
US4501329A (en) * | 1983-04-18 | 1985-02-26 | Chevron Research Company | Non-abrasive particulate material for permeability alteration in subsurface formations |
US4957174A (en) * | 1989-06-29 | 1990-09-18 | Conoco Inc. | Method of controlling lost circulation in well drilling |
NL9001145A (en) * | 1990-05-16 | 1991-12-16 | Norman Laurie Jacobs | LUBRICANT. |
ZA929373B (en) * | 1991-12-06 | 1993-06-02 | Chem Services | Drilling mud additive. |
US5211250A (en) * | 1992-01-21 | 1993-05-18 | Conoco Inc. | Method for stabilizing boreholes |
-
1996
- 1996-12-04 EG EG107496A patent/EG21132A/en active
- 1996-12-10 DK DK96944244T patent/DK0866842T3/en active
- 1996-12-10 US US08/763,201 patent/US5826669A/en not_active Expired - Lifetime
- 1996-12-10 AU AU14102/97A patent/AU1410297A/en not_active Abandoned
- 1996-12-10 DE DE69632831T patent/DE69632831T2/en not_active Expired - Lifetime
- 1996-12-10 EA EA199800570A patent/EA000357B1/en not_active IP Right Cessation
- 1996-12-10 WO PCT/US1996/019431 patent/WO1997022677A1/en active IP Right Grant
- 1996-12-10 EP EP96944244A patent/EP0866842B1/en not_active Expired - Lifetime
- 1996-12-10 CA CA002240290A patent/CA2240290C/en not_active Expired - Fee Related
- 1996-12-10 AR ARP960105591A patent/AR004370A1/en unknown
- 1996-12-14 DZ DZ960188A patent/DZ2143A1/en active
- 1996-12-16 CO CO96065983A patent/CO4600753A1/en unknown
-
1997
- 1997-03-11 SA SA97170710A patent/SA97170710B1/en unknown
-
1998
- 1998-06-12 NO NO19982733A patent/NO314591B2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU1410297A (en) | 1997-07-14 |
EP0866842B1 (en) | 2004-06-30 |
NO314591B1 (en) | 2003-04-14 |
CO4600753A1 (en) | 1998-05-08 |
WO1997022677A1 (en) | 1997-06-26 |
DE69632831D1 (en) | 2004-08-05 |
NO314591B2 (en) | 2003-04-14 |
US5826669A (en) | 1998-10-27 |
EA199800570A1 (en) | 1998-12-24 |
DZ2143A1 (en) | 2002-10-23 |
NO982733L (en) | 1998-06-12 |
NO982733D0 (en) | 1998-06-12 |
SA97170710B1 (en) | 2006-09-04 |
DE69632831T2 (en) | 2005-07-14 |
EP0866842A4 (en) | 1999-02-03 |
EA000357B1 (en) | 1999-06-24 |
EG21132A (en) | 2000-11-29 |
AR004370A1 (en) | 1998-11-04 |
CA2240290C (en) | 2005-06-28 |
EP0866842A1 (en) | 1998-09-30 |
DK0866842T3 (en) | 2004-10-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20161212 |