EP0452999A2 - Rotierender Meissel mit Brockennuten in seinem Umfang - Google Patents

Rotierender Meissel mit Brockennuten in seinem Umfang Download PDF

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Publication number
EP0452999A2
EP0452999A2 EP91111602A EP91111602A EP0452999A2 EP 0452999 A2 EP0452999 A2 EP 0452999A2 EP 91111602 A EP91111602 A EP 91111602A EP 91111602 A EP91111602 A EP 91111602A EP 0452999 A2 EP0452999 A2 EP 0452999A2
Authority
EP
European Patent Office
Prior art keywords
chip
cutter
bit
jet
face
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Withdrawn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
EP91111602A
Other languages
English (en)
French (fr)
Other versions
EP0452999A3 (en
Inventor
William R. Trujillo
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.)
Baker Hughes Oilfield Operations LLC
Original Assignee
Eastman Christensen Co
Eastman Teleco Co
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 Eastman Christensen Co, Eastman Teleco Co filed Critical Eastman Christensen Co
Publication of EP0452999A2 publication Critical patent/EP0452999A2/de
Publication of EP0452999A3 publication Critical patent/EP0452999A3/en
Withdrawn legal-status Critical Current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
    • E21B10/46—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
    • E21B10/5671—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts with chip breaking arrangements
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • the invention relater to a rotating bit as set forth in the preamble of claim 1.
  • a bit of the kind referred to is known from US-A-4 098 363 including junk slots which have a single profile throughout their longitudinal length.
  • the invention is more graphically depicted in the drawing illustrating a top plan view of a mold from which a matrix bit incorporating the invention is fabricated.
  • bit generally denoted by reference numeral 10
  • gage 12 terminated on its lowermost portion by a bit face, generally denoted by reference numeral 14.
  • gage 12 defines a plurality of junk slots 16 and 18.
  • Junk slots 16 are distinguishable from junk slots 18 in that junk slots 16 have uniform contour as opposed to a contoured or compound surface within junk slots 18 as will be described below.
  • a 12 1/4 inch diameter bit is illustrated in which nine large cutters 21-29 will be formed, each comprising a substrate 45, a slug 44 and a diamond table 46 as shown at cutter 24, which is brazed into a pocket 48 of the mold at positions 1 - 9.
  • each cutter is shown in midline cross-sectional view with the diamond cutter in place.
  • the diamond slugs may be fixed or brazed into the bit in a later step, and would not be seen in place in the mold as depicted in the drawings. See generally US-A-4 098 363 for background information concerning the casting of the bit body, cutter shapes and materials, and various methods of attachment of the cutters.
  • each cutter is a nozzle 31-39 which provides a directed flow to the cutter.
  • Nozzle 31 thus provides directed flow for cutter 21, nozzle 32 for cutter 22 and so forth through nozzle 39 and cutter 29.
  • a plurality of gage cutters 40 are defined within the shoulder and gage of bit 10 which are also illustrated in a sometimes overlying relationship. The depiction of gage cutters 40 appears to be overlying since the cutters, which may be vertically separated, are superimposed in the diagrammatic view of the drawing.
  • gage defining cutters 40 are comprised of conventionally fabricated Stratapax or Compax cutters and can, by virtue of their relative scale to cutters 21-29, provide a relative feel for the sizes of cutters 21-29.
  • cutters 21-29 of the illustrated embodiment have a predetermined rake angle of diamond table 46.
  • each cutter 21-29 has been shown only in a midline section for the sake of clarity. Therefore it must be kept in mind that portions of the face of diamond table 46 actually extend both in front of and behind the midsection line shown in the illustration for each cutter 21-29 by an amount depending on the rake angle of each cutter.
  • the cutter can have different shapes, e.g. triangular, hexagonal, square, or octagonal.
  • the cutter can be composed of thermally stable diamond or some other material such as silicon carbide, tungsten carbide, or baron carbide.
  • the cutter can be furnaced with the bit body in order to attach it to the bit.
  • the junk slot 18 is characterized by having at least two distinct cross-sectional profiles, namely a symmetric profile at its upper portion farthest from the bit face and an asymmetric profile along its lower portion.
  • the asymmetric and symmetric profiles are connected by a surface providing a smooth hydrodynamic transition.
  • Junk slot 18 is a longitudinal cavity defined within gage 12 to facilitate removal of cut material.
  • junk slot 18 is characterized by a first asymmetric profile shown in dotted outline as portion 80.
  • the upper portion of junk slot 18, furthest away from the face 14, has a distinct second profile 82 as depicted in solid outline.
  • the lower section of junk slot 18 has a nonuniform asymmetric profile 80 while the upper section has a substantially uniform symmetric profile 82.
  • the transition between profiles 80 and 82 within the middle region of junk slot 18 is smoothed so that cross sections (not shown) would reflect a smooth hydrodynamic transition between the dramatically different profiles 80 and 82.
  • first profile 80 has been shown with a wedge shaped leading portion, which transitions to a full depth, following portion which is equivalent to second profile 82. It is entirely within the scope of the invention that profile 80 may be reversed, namely having a full depth leading profile transitioning to a wedged-shaped following portion.
  • any junk slot profile known in the art in addition to illustrated profiles 80 and 82 may be used or variously combined with each other as may be desired.
  • the longitudinal relationship of the portions may be reversed if desired.
  • asymmetric profile 80 may characterize the upper section of junk slot 18, while full portion 82 would characterize the lower section nearest bit face 14.

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)
  • Earth Drilling (AREA)
  • Milling Processes (AREA)
EP19910111602 1986-09-11 1987-09-10 A rotating bit with junk slots in its gage Withdrawn EP0452999A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90616986A 1986-09-11 1986-09-11
US906169 1986-09-11

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP87113231.2 Division 1987-09-10

Publications (2)

Publication Number Publication Date
EP0452999A2 true EP0452999A2 (de) 1991-10-23
EP0452999A3 EP0452999A3 (en) 1992-03-11

Family

ID=25422035

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87113231A Expired - Lifetime EP0259872B1 (de) 1986-09-11 1987-09-10 Drehbohrmeissel mit grossen Schneidelementen und einem Flüssigkeitsstrahl für jedes Schneidelement
EP19910111602 Withdrawn EP0452999A3 (en) 1986-09-11 1987-09-10 A rotating bit with junk slots in its gage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP87113231A Expired - Lifetime EP0259872B1 (de) 1986-09-11 1987-09-10 Drehbohrmeissel mit grossen Schneidelementen und einem Flüssigkeitsstrahl für jedes Schneidelement

Country Status (5)

Country Link
EP (2) EP0259872B1 (de)
JP (1) JPS63134782A (de)
CA (1) CA1295321C (de)
DE (1) DE3781226T2 (de)
NO (1) NO873803L (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172778A (en) * 1991-11-14 1992-12-22 Baker-Hughes, Inc. Drill bit cutter and method for reducing pressure loading of cutters
US5265685A (en) * 1991-12-30 1993-11-30 Dresser Industries, Inc. Drill bit with improved insert cutter pattern
JPH0576584U (ja) * 1992-03-26 1993-10-19 アロン化成株式会社 曲管清掃具
US5592996A (en) * 1994-10-03 1997-01-14 Smith International, Inc. Drill bit having improved cutting structure with varying diamond density
JP2007118501A (ja) * 2005-10-31 2007-05-17 Tosei Kensetsu Kk 穿孔ビット装置及び穿孔機
RU2012155102A (ru) 2010-05-20 2014-06-27 Бейкер Хьюз Инкорпорейтед Способ формирования по меньшей мере части бурильного инструмента и изделия, сформированные таким способом

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098363A (en) * 1977-04-25 1978-07-04 Christensen, Inc. Diamond drilling bit for soft and medium hard formations
EP0182770A1 (de) * 1984-11-12 1986-05-28 DIAMANT BOART Société Anonyme Diamantbohrmeissel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4303136A (en) * 1979-05-04 1981-12-01 Smith International, Inc. Fluid passage formed by diamond insert studs for drag bits
DE3039633C2 (de) * 1980-10-21 1983-08-18 Christensen, Inc., 84115 Salt Lake City, Utah Drehbohrmeißel, insbesondere für Tiefbohrungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098363A (en) * 1977-04-25 1978-07-04 Christensen, Inc. Diamond drilling bit for soft and medium hard formations
EP0182770A1 (de) * 1984-11-12 1986-05-28 DIAMANT BOART Société Anonyme Diamantbohrmeissel

Also Published As

Publication number Publication date
DE3781226D1 (de) 1992-09-24
EP0452999A3 (en) 1992-03-11
CA1295321C (en) 1992-02-04
EP0259872A2 (de) 1988-03-16
NO873803D0 (no) 1987-09-11
NO873803L (no) 1988-03-14
EP0259872B1 (de) 1992-08-19
DE3781226T2 (de) 1993-03-25
JPS63134782A (ja) 1988-06-07
EP0259872A3 (en) 1989-10-25

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