US3768581A - Frustro-conical drilling bit having radially tiered groups of teeth - Google Patents

Frustro-conical drilling bit having radially tiered groups of teeth Download PDF

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Publication number
US3768581A
US3768581A US00249578A US3768581DA US3768581A US 3768581 A US3768581 A US 3768581A US 00249578 A US00249578 A US 00249578A US 3768581D A US3768581D A US 3768581DA US 3768581 A US3768581 A US 3768581A
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US
United States
Prior art keywords
tool
radial
teeth
tooth
drilling tool
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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.)
Expired - Lifetime
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US00249578A
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English (en)
Inventor
C Rederon
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.)
Total Compagnie Francaise des Petroles SA
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Compagnie Francaise des Petroles SA
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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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit

Definitions

  • ABSTRACT A frustro-conical drilling bit having overlapping tiers of teeth arranged in radial groups. Each main group has an arched nose projection, alternate ones of which depend into a central cavity to define drilling mud channels. Intermediate teeth groups are positioned between the main groups and each is closer to the fol lowing main group in the direction of rotation.
  • the aim of the invention is to further increase the life expectancy of this type of drilling tool, that is, a tool having attack projections distributed over its entire surface and having a central hollow zone containing the drilling mud delivery channels.
  • the invention is characterized in that the projections form ascending tiers extending from the base to the nose of the tool when in a vertical position, but in the opposite direction in its drilling position.
  • the tiers are divided in radial groups of projections, each having, at least with the exception of the projections at the nose ofthe tool, two radial surfaces, a peripheral surface and an upper surface, such that the leading radial surface, with respect to the direction of rotation of the tool, of each projection of the same radial group interrupts the upper surface of the lower adjacent projection.
  • Another aim of the invention is to provide a tool of this type, in which the upper or nose projections of the tool have leading radial surfaces which cut across the upper surfaces of the tiered projections and extend into the central hollow part of the tool such that each mud delivery channel orifice is separated from the adjacent orifice by at least one of the projections adjacent to it.
  • Another aim of the invention is to provide a tool of this type in which the surfaces between two projections on the nose of the tool consiyt of shoulders extending in a sloping manner from one part of the trailing radial surface close to the upper ridge of a projection to the bottom of the leading radial surface of the adjacent projection.
  • Another aim of the invention is to provide a tool of this type in which the number of groups of tiered projections is increased by disposing an intermediate radial group between each two radial groups extending from a nose projection of the tool to its base.
  • the distance between the leading radial surfaces of the projections of the intermediate group and the trailing surfaces of the projections of the adjacentradial group is greater than the distance between the trailing surfaces of the intermediate group and the leading surfaces of the adjacent projections of the other adjacent radial group.
  • the intermediate groups are not disposed midway between adjacent radial groups.
  • FIG. 1 is a perspective view of the tool
  • FIG. 2 is a schematic plan view showing the arrangement of the radial groups of projections
  • FIG. 3 is a view along the line III-III of FIG. 2;
  • FIG. 4 is a diagrammatic view of the peripheral surface of a projection.
  • FIG. 1 shows the tool resting on the base of the threaded connection 1 which allows it to be screwed onto the appropriate shaft.
  • Each projection 2 comprises an upper surface 2a, a peripheral surface 2b, a leading radial surface 20 and a trailing surface 2d. In the preferred embodiment, these surfaces are flat. The radial surfaces are bordered by shoulders.
  • the projections are disposed in radial groups, such as those represented by 3 and 4, consisting respectively of projections 5 to 9 and 10 to 14. These groups, which include projections 9 and 14 of the nose of the tool, are separated by intermediate radial groups, such as group 33 consisting of projections 15 to 18.
  • the projections are disposed in crowns.
  • the projections 5 to 8, 10 to 13 and 15 to 18 are disposed on four crowns or tiers.
  • the projections 5, 15 and 10 are disposed on the crown with the largest diameter and the projections 8, l8 and 13 on the crown having -internal extension in the central part.
  • each of the projections 14, 20, 26 and 27 separates two adjacent orifices.
  • the end of the projection 14 separates the orifices 22 and 25.'
  • the internal extensions of the other projections 9, 19, etc. stop at the wall of the hollow part at some distance from the bottom to allow the free passage of the ground dislodged and drained by the mud. As the mud passes through the orifices it is channeled to ensure a steady flow between the internal extensions of the projections of the various radial groups.
  • the projections are inclined, as shown in FIG. 4, to present a cutting angle of between 6 and 14. All the outer projections rise above lower surfaces which are slightly recessed with respect to their outer peripheral surfaces as may be seen in FIG. 3. Furthermore, all the peripheral surfaces, such as 28b in FIG. 3, for example, are slightly inclined on the horizontal surface 29a of the next lower projection at an angle of 1 to 6. In FIG. 3 the line 30 represents the profile of the tool between two radial groups of projections.
  • Each projection may be strengthened on its trailing radial surface by a shoulder starting from an adjacent part of the upper edge of the radial surface and extending in a sloping manner and joining together at the base of the leading radial surface of the subsequent projection.
  • each projection at the nose of the tool may comprise shoulders which join together with the shoulders of the adjacent projections such that the connection of the shoulders, such as 31 between the projections 9 and 14, is disposed in the lowest region of the nose. This region is used for the passage of the drilling mud which flows between the radial groups. It may also be moved slightly towards the leading radial surface of the projection directly following it with respect to the direction of rotation of the tool.
  • the mud flowing between two projections 9 and 14 at the nose of the tool tends to sweep across the successive shoulders disposed radially in series and across the radial leading and horizontal surfaces of each projection, thus eliminating any danger of clogging.
  • the intermediate group 33 which is disposed between the radial groups 3 and 4 is closer to group 3 than to group 4, such that the flow of mud circulating between the projections 9 and 14 divides appropriately into a first current between the groups 3 and 33 and into a second current between the groups 33 and 4 instead of flowing primarily in the area between groups 3 and 33.
  • the projections of the intermediate groups may be staggered towards the top or the bottom to an extent approximating the size of the diamonds used. These diamonds may be embedded in the metal forming the attack surfaces of the projections.
  • this stagger may vary from 1 to a few millimeters. This particular arrangement makes it possible to increase the drilling depth capable of being obtained without raising the tool, irrespective of the differences and features of the ground encountered, while at the same time maintaining a high drilling speed.
  • a drilling tool comprising a frustro-conical body bearing attack projections of metal teeth embedded with diamonds, each tooth having an outer peripheral surface with respect to the axis of the tool, front and rear radial surfaces and an upper surface intersecting the radial and peripheral surfaces, the teeth being disposed in concentric, tiered groups, orifices in the tool body for supplying drilling mud, the teeth being further arranged in radial rows, the peripheral surface of each tooth in the same radial row interrupting the upper surface of the lower adjacent tooth.

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  • 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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US00249578A 1971-05-04 1972-05-02 Frustro-conical drilling bit having radially tiered groups of teeth Expired - Lifetime US3768581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7115966A FR2135053B1 (fr) 1971-05-04 1971-05-04

Publications (1)

Publication Number Publication Date
US3768581A true US3768581A (en) 1973-10-30

Family

ID=9076363

Family Applications (1)

Application Number Title Priority Date Filing Date
US00249578A Expired - Lifetime US3768581A (en) 1971-05-04 1972-05-02 Frustro-conical drilling bit having radially tiered groups of teeth

Country Status (9)

Country Link
US (1) US3768581A (fr)
JP (1) JPS5318963B1 (fr)
CA (1) CA967945A (fr)
CH (1) CH552126A (fr)
DE (1) DE2220455C3 (fr)
FR (1) FR2135053B1 (fr)
GB (1) GB1394115A (fr)
IT (1) IT954958B (fr)
RO (1) RO64710A (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871488A (en) * 1974-02-13 1975-03-18 Daniel R Sabre Rock drilling
US4073354A (en) * 1976-11-26 1978-02-14 Christensen, Inc. Earth-boring drill bits
US4207954A (en) * 1977-03-31 1980-06-17 Compagnie Francaise Des Petroles Core bit having axial conical core breaker
US4719979A (en) * 1986-03-24 1988-01-19 Smith International, Inc. Expendable diamond drag bit
US4813500A (en) * 1987-10-19 1989-03-21 Smith International, Inc. Expendable diamond drag bit
US5025873A (en) * 1989-09-29 1991-06-25 Baker Hughes Incorporated Self-renewing multi-element cutting structure for rotary drag bit
US5456312A (en) 1986-01-06 1995-10-10 Baker Hughes Incorporated Downhole milling tool
US20100155151A1 (en) * 2008-12-19 2010-06-24 Varel International Multi-set pdc drill bit and method
CN102704853A (zh) * 2012-06-21 2012-10-03 四川深远石油钻井工具有限公司 钻进比压可控的模块切削齿
US9731358B2 (en) 2013-06-06 2017-08-15 Milwaukee Electric Tool Corporation Step drill bit
US20210363831A1 (en) * 2020-05-07 2021-11-25 Kenneth Layton STARR System and Method for A Drill Bit
US11208847B2 (en) * 2017-05-05 2021-12-28 Schlumberger Technology Corporation Stepped downhole tools and methods of use
US11273501B2 (en) 2018-04-26 2022-03-15 Milwaukee Electric Tool Corporation Step drill bit

Families Citing this family (4)

* 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
GB2123881B (en) * 1982-07-20 1985-11-13 Sumitomo Metal Mining Co Well drilling bit
FR2538442B1 (fr) * 1982-12-23 1986-02-28 Charbonnages De France Taillant pour foration rotative assistee par jet
FI103430B (fi) * 1994-10-05 1999-06-30 Valto Ilomaeki Poralaite ja menetelmä reiän poraamiseksi useaan erilaatuiseen maaperä än

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
US2894726A (en) * 1956-04-10 1959-07-14 Earl M Weaver Drilling bit
US3127945A (en) * 1960-03-02 1964-04-07 Jersey Prod Res Co Drag bit
US3135341A (en) * 1960-10-04 1964-06-02 Christensen Diamond Prod Co Diamond drill bits
US3181632A (en) * 1960-12-16 1965-05-04 Aquitaine Petrole Diamond drill bit
US3599736A (en) * 1970-05-18 1971-08-17 American Coldset Corp Rotary drill bit
US3696875A (en) * 1969-03-19 1972-10-10 Petroles Cie Francaise Diamond-studded drilling tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914723C (de) * 1949-02-03 1954-07-08 Wallram Hartmetall Bohrer fuer Gesteinsdrehbohrmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
US2894726A (en) * 1956-04-10 1959-07-14 Earl M Weaver Drilling bit
US3127945A (en) * 1960-03-02 1964-04-07 Jersey Prod Res Co Drag bit
US3135341A (en) * 1960-10-04 1964-06-02 Christensen Diamond Prod Co Diamond drill bits
US3181632A (en) * 1960-12-16 1965-05-04 Aquitaine Petrole Diamond drill bit
US3696875A (en) * 1969-03-19 1972-10-10 Petroles Cie Francaise Diamond-studded drilling tool
US3599736A (en) * 1970-05-18 1971-08-17 American Coldset Corp Rotary drill bit

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871488A (en) * 1974-02-13 1975-03-18 Daniel R Sabre Rock drilling
US4073354A (en) * 1976-11-26 1978-02-14 Christensen, Inc. Earth-boring drill bits
US4207954A (en) * 1977-03-31 1980-06-17 Compagnie Francaise Des Petroles Core bit having axial conical core breaker
US5456312A (en) 1986-01-06 1995-10-10 Baker Hughes Incorporated Downhole milling tool
US5810079A (en) 1986-01-06 1998-09-22 Baker Hughes Incorporated Downhole milling tool
US5899268A (en) 1986-01-06 1999-05-04 Baker Hughes Incorporated Downhole milling tool
US4719979A (en) * 1986-03-24 1988-01-19 Smith International, Inc. Expendable diamond drag bit
US4813500A (en) * 1987-10-19 1989-03-21 Smith International, Inc. Expendable diamond drag bit
US5025873A (en) * 1989-09-29 1991-06-25 Baker Hughes Incorporated Self-renewing multi-element cutting structure for rotary drag bit
US8327956B2 (en) 2008-12-19 2012-12-11 Varel International, Ind., L.P. Multi-set PDC drill bit and method
US20100155151A1 (en) * 2008-12-19 2010-06-24 Varel International Multi-set pdc drill bit and method
CN102704853A (zh) * 2012-06-21 2012-10-03 四川深远石油钻井工具有限公司 钻进比压可控的模块切削齿
CN102704853B (zh) * 2012-06-21 2015-07-15 四川深远石油钻井工具股份有限公司 钻进比压可控的模块切削齿
US9731358B2 (en) 2013-06-06 2017-08-15 Milwaukee Electric Tool Corporation Step drill bit
US10252351B2 (en) 2013-06-06 2019-04-09 Milwaukee Electric Tool Corporation Step drill bit
US10695845B2 (en) 2013-06-06 2020-06-30 Milwaukee Electric Tool Corporation Step drill bit
USD936117S1 (en) 2013-06-06 2021-11-16 Milwaukee Electric Tool Corporation Step drill bit
US11208847B2 (en) * 2017-05-05 2021-12-28 Schlumberger Technology Corporation Stepped downhole tools and methods of use
US11273501B2 (en) 2018-04-26 2022-03-15 Milwaukee Electric Tool Corporation Step drill bit
US11691203B2 (en) 2018-04-26 2023-07-04 Milwaukee Electric Tool Corporation Step drill bit
US20210363831A1 (en) * 2020-05-07 2021-11-25 Kenneth Layton STARR System and Method for A Drill Bit

Also Published As

Publication number Publication date
DE2220455B2 (de) 1973-09-13
CA967945A (en) 1975-05-20
DE2220455A1 (de) 1972-11-16
FR2135053A1 (fr) 1972-12-15
JPS5318963B1 (fr) 1978-06-17
FR2135053B1 (fr) 1974-08-19
DE2220455C3 (de) 1974-04-11
RO64710A (fr) 1979-06-15
CH552126A (fr) 1974-07-31
GB1394115A (en) 1975-05-14
IT954958B (it) 1973-09-15

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