EP0400921A3 - Bohrmeissel mit konzentrischen rotierbaren Schneidelementen und Bohrverfahren - Google Patents

Bohrmeissel mit konzentrischen rotierbaren Schneidelementen und Bohrverfahren Download PDF

Info

Publication number: EP0400921A3
Authority: EP; European Patent Office
Prior art keywords: drill bit; bit assembly; drilling; cutting elements; rotatable cutting
Prior art date: 1989-05-30
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP19900305734

Other languages

English (en)

French (fr)

Other versions

EP0400921A2 (de

Inventor

Michael Leslie Ryall

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Weir Pumps Ltd

Original Assignee

Weir Pumps Ltd

Priority date (The priority date 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 date listed.)

1989-05-30

Filing date

1990-05-25

Publication date

1991-09-11

1990-05-25 Application filed by Weir Pumps Ltd filed Critical Weir Pumps Ltd

1990-12-05 Publication of EP0400921A2 publication Critical patent/EP0400921A2/de

1991-09-11 Publication of EP0400921A3 publication Critical patent/EP0400921A3/de

Status Withdrawn legal-status Critical Current

Links

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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units

Landscapes

Engineering & Computer Science (AREA)
Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Mining & Mineral Resources (AREA)
Mechanical Engineering (AREA)
Physics & Mathematics (AREA)
Environmental & Geological Engineering (AREA)
Fluid Mechanics (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Earth Drilling (AREA)

EP19900305734 1989-05-30 1990-05-25 Bohrmeissel mit konzentrischen rotierbaren Schneidelementen und Bohrverfahren Withdrawn EP0400921A3 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8912396		1989-05-30
GB898912396A GB8912396D0 (en)	1989-05-30	1989-05-30	Drill bit for use in a system for drilling oil and gas wells

Publications (2)

Publication Number	Publication Date
EP0400921A2 EP0400921A2 (de)	1990-12-05
EP0400921A3 true EP0400921A3 (de)	1991-09-11

Family

ID=10657580

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19900305734 Withdrawn EP0400921A3 (de)	1989-05-30	1990-05-25	Bohrmeissel mit konzentrischen rotierbaren Schneidelementen und Bohrverfahren

Country Status (4)

Country	Link
EP (1)	EP0400921A3 (de)
BR (1)	BR9002563A (de)
GB (1)	GB8912396D0 (de)
NO (1)	NO902381L (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB9521944D0 (en) *	1995-10-26	1996-01-03	Camco Drilling Group Ltd	A drilling assembly for use in drilling holes in subsurface formations
WO2013043153A1 (en)	2011-09-20	2013-03-28	Halliburton Energy Services Inc.	Systems and methods for limiting torque transmission

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4267893A (en) *	1979-08-27	1981-05-19	Union Oil Company Of California	Dual-rotating eccentric drilling apparatus and method
EP0155540A1 (de) *	1984-03-07	1985-09-25	Witte Bohrtechnik GmbH	Nach dem Bodenentnahmeprinzip arbeitende Einrichtung zum unterirdischen Vorpressen von Rohren
WO1987006300A1 (en) *	1986-04-11	1987-10-22	Drilex Uk Limited	Improvements in drilling using downhole drilling tools
US4862974A (en) *	1988-12-07	1989-09-05	Amoco Corporation	Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer

1989
- 1989-05-30 GB GB898912396A patent/GB8912396D0/en active Pending
1990
- 1990-05-25 EP EP19900305734 patent/EP0400921A3/de not_active Withdrawn
- 1990-05-29 NO NO90902381A patent/NO902381L/no unknown
- 1990-05-30 BR BR909002563A patent/BR9002563A/pt unknown

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4267893A (en) *	1979-08-27	1981-05-19	Union Oil Company Of California	Dual-rotating eccentric drilling apparatus and method
EP0155540A1 (de) *	1984-03-07	1985-09-25	Witte Bohrtechnik GmbH	Nach dem Bodenentnahmeprinzip arbeitende Einrichtung zum unterirdischen Vorpressen von Rohren
WO1987006300A1 (en) *	1986-04-11	1987-10-22	Drilex Uk Limited	Improvements in drilling using downhole drilling tools
US4862974A (en) *	1988-12-07	1989-09-05	Amoco Corporation	Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer

Also Published As

Publication number	Publication date
GB8912396D0 (en)	1989-07-12
NO902381D0 (no)	1990-05-29
EP0400921A2 (de)	1990-12-05
BR9002563A (pt)	1991-08-13
NO902381L (no)	1990-12-03

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Legal Events

Date	Code	Title	Description
1990-10-20	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
1990-12-05	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE
1991-07-25	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1991-09-11	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE
1992-04-22	17P	Request for examination filed	Effective date: 19920221
1993-03-17	17Q	First examination report despatched	Effective date: 19930129
1993-10-22	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1993-12-15	18D	Application deemed to be withdrawn	Effective date: 19930609