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EP0400921A3 - Drill bit assembly with concentric rotatable cutting elements and method of drilling - Google Patents

Drill bit assembly with concentric rotatable cutting elements and method of drilling Download PDF

Info

Publication number
EP0400921A3
EP0400921A3 EP19900305734 EP90305734A EP0400921A3 EP 0400921 A3 EP0400921 A3 EP 0400921A3 EP 19900305734 EP19900305734 EP 19900305734 EP 90305734 A EP90305734 A EP 90305734A EP 0400921 A3 EP0400921 A3 EP 0400921A3
Authority
EP
European Patent Office
Prior art keywords
drill bit
bit assembly
drilling
cutting elements
rotatable cutting
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.)
Withdrawn
Application number
EP19900305734
Other languages
German (de)
French (fr)
Other versions
EP0400921A2 (en
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.)
Filing date
Publication date
Application filed by Weir Pumps Ltd filed Critical Weir Pumps Ltd
Publication of EP0400921A2 publication Critical patent/EP0400921A2/en
Publication of EP0400921A3 publication Critical patent/EP0400921A3/en
Withdrawn legal-status Critical Current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)

Abstract

The invention relates to a drilling system and a drill bit assembly therefor, said drill bit assembly incorporating at least two concentric rotatable cutting elements (9,11 and 30,33) of which one cutting element (9,30) is adapted to be rotated at a rotational speed which is different from that of the other cutting element (11,33).
EP19900305734 1989-05-30 1990-05-25 Drill bit assembly with concentric rotatable cutting elements and method of drilling Withdrawn EP0400921A3 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=10657580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900305734 Withdrawn EP0400921A3 (en) 1989-05-30 1990-05-25 Drill bit assembly with concentric rotatable cutting elements and method of drilling

Country Status (4)

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

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 (en) * 1984-03-07 1985-09-25 Witte Bohrtechnik GmbH Apparatus working like an excavator for pushing pipes under the soil
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

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 (en) * 1984-03-07 1985-09-25 Witte Bohrtechnik GmbH Apparatus working like an excavator for pushing pipes under the soil
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
EP0400921A2 (en) 1990-12-05
GB8912396D0 (en) 1989-07-12
NO902381D0 (en) 1990-05-29
BR9002563A (en) 1991-08-13
NO902381L (en) 1990-12-03

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