EP1134355A2 - Drehbohrmeissel - Google Patents

Drehbohrmeissel Download PDF

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Publication number
EP1134355A2
EP1134355A2 EP01113872A EP01113872A EP1134355A2 EP 1134355 A2 EP1134355 A2 EP 1134355A2 EP 01113872 A EP01113872 A EP 01113872A EP 01113872 A EP01113872 A EP 01113872A EP 1134355 A2 EP1134355 A2 EP 1134355A2
Authority
EP
European Patent Office
Prior art keywords
cutters
drill bit
cutter
bit according
formation
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Withdrawn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
EP01113872A
Other languages
English (en)
French (fr)
Other versions
EP1134355A3 (de
Inventor
John M. Fuller
Andrew Murdock
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.)
Camco Drilling Group Ltd
Original Assignee
Camco Drilling Group 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 Camco Drilling Group Ltd filed Critical Camco Drilling Group Ltd
Priority claimed from EP95306936A external-priority patent/EP0707130B1/de
Publication of EP1134355A2 publication Critical patent/EP1134355A2/de
Publication of EP1134355A3 publication Critical patent/EP1134355A3/de
Withdrawn legal-status Critical Current

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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
    • E21B10/00—Drill bits
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • 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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face

Definitions

  • the invention is particularly, but not exclusively, applicable to drill bits in which some or all of the cutters are preform (PDC) cutters each formed, at least in part, from polycrystalline diamond.
  • PDC preform
  • One common form of cutter comprises a tablet, usually circular or part-circular, made up of a superhard table of polycrystalline diamond, providing the front cutting face of the element, bonded to a substrate which is usually of cemented tungsten carbide.
  • the cutter may comprise a generally cylindrical substrate formed at one end with two oppositely inclined surfaces meeting along a ridge, a facing table of polycrystalline diamond, or other superhard material, being bonded to said substrate surfaces, and preferably extending continuously over the ridge.
  • the ridge passes through the central longitudinal axis of the substrate, and preferably extends at right angles thereto.
  • the two surfaces are preferably substantially symmetrically arranged on each side of the ridge.
  • the cutters are usually located at different distances from the central axis of rotation of the drill bit, to ensure that the entire surface of the bottom of the hole being drilled is acted on by the cutting elements, although, as previously mentioned, arrangements are also known where concentric annular regions of the bottom of the borehole are not acted on by the cutters. In all cases, however, cutters which are located further from the axis of rotation move more rapidly relative to the formation than cutters nearer the axis of rotation, and the overall annular area of formation swept by each such cutter is greater.
  • Figure 1 shows diagrammatically a step-type rotary drill bit for use in drilling deep holes in subsurface formations.
  • the drill bit comprises a bit body 10 having a leading face 11 and a gauge region 12.
  • the bit body is machined from steel and has a tapered threaded shank 13 for connection to a drill string.
  • the negative side rake and top rake may also be applied to outwardly directed cutters and this may be done, not only in a drill bit of the configuration shown in Figure 1, but also in drill bits where the cutting profile is not formed with a central conical depression.
  • the cutter of Figures 9 to 11 is mounted on the drill bit in similar manner to that shown in Figure 4 or Figure 6 so that one of the faces 46, 47 bears substantially tangentially against the formation while the other face is disposed at a back rake angle of approximately 30°.
  • plough cutters 49 are mounted on the bit body 50 around the lowermost annular nose portion of a crown bit. As indicated diagrammatically in Figure 12, the plough cutters create V-section annular grooves 51 in the formation 52 at the bottom of the borehole and, due to their shape, the grooves tend to keep the plough cutters in an annular path thus enhancing the lateral stability of the bit.
  • plough cutters are used on the flanks of the bit body they have the effect of cutting a "screw thread" in the formation, which may also enhance the axial stability of the bit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
EP01113872A 1994-10-15 1995-09-29 Drehbohrmeissel Withdrawn EP1134355A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9420839A GB9420839D0 (en) 1994-10-15 1994-10-15 Improvements in or relating to rotary drill bits
GB9420839 1994-10-15
EP95306936A EP0707130B1 (de) 1994-10-15 1995-09-29 Drehbohrmeissel

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95306936A Division EP0707130B1 (de) 1994-10-15 1995-09-29 Drehbohrmeissel

Publications (2)

Publication Number Publication Date
EP1134355A2 true EP1134355A2 (de) 2001-09-19
EP1134355A3 EP1134355A3 (de) 2002-03-06

Family

ID=10762922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113872A Withdrawn EP1134355A3 (de) 1994-10-15 1995-09-29 Drehbohrmeissel

Country Status (2)

Country Link
EP (1) EP1134355A3 (de)
GB (1) GB9420839D0 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
WO2008100455A1 (en) 2007-02-12 2008-08-21 Baker Hughes Incorporated Rotary drag bit
US8911624B2 (en) 2007-10-03 2014-12-16 Emd Millipore Corporation Stacked plates filtration cartridge
CN108222845A (zh) * 2018-04-09 2018-06-29 成都百施特金刚石钻头有限公司 钻采工具用环状切削合金齿
WO2023005108A1 (zh) * 2021-07-29 2023-02-02 东北石油大学 一种适用于软硬夹层的定向双齿自平衡pdc钻头
CN116591614A (zh) * 2023-04-03 2023-08-15 吉林大学 一种软硬交错地层双层变切削角切削工具

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140189A (en) * 1977-06-06 1979-02-20 Smith International, Inc. Rock bit with diamond reamer to maintain gage
US4475606A (en) * 1982-08-09 1984-10-09 Dresser Industries, Inc. Drag bit
US5178222A (en) * 1991-07-11 1993-01-12 Baker Hughes Incorporated Drill bit having enhanced stability
US5238075A (en) * 1992-06-19 1993-08-24 Dresser Industries, Inc. Drill bit with improved cutter sizing pattern

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
US7225890B2 (en) 2003-08-12 2007-06-05 Black & Decker Inc. Cutting plate for a drill bit
WO2008100455A1 (en) 2007-02-12 2008-08-21 Baker Hughes Incorporated Rotary drag bit
US8911624B2 (en) 2007-10-03 2014-12-16 Emd Millipore Corporation Stacked plates filtration cartridge
CN108222845A (zh) * 2018-04-09 2018-06-29 成都百施特金刚石钻头有限公司 钻采工具用环状切削合金齿
WO2023005108A1 (zh) * 2021-07-29 2023-02-02 东北石油大学 一种适用于软硬夹层的定向双齿自平衡pdc钻头
CN116591614A (zh) * 2023-04-03 2023-08-15 吉林大学 一种软硬交错地层双层变切削角切削工具

Also Published As

Publication number Publication date
GB9420839D0 (en) 1994-11-30
EP1134355A3 (de) 2002-03-06

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