CA2675270A1 - Rotary drag bit and methods therefor - Google Patents

Rotary drag bit and methods therefor Download PDF

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Publication number
CA2675270A1
CA2675270A1 CA002675270A CA2675270A CA2675270A1 CA 2675270 A1 CA2675270 A1 CA 2675270A1 CA 002675270 A CA002675270 A CA 002675270A CA 2675270 A CA2675270 A CA 2675270A CA 2675270 A1 CA2675270 A1 CA 2675270A1
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CA
Canada
Prior art keywords
cutter
backup
primary
backup cutter
region
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.)
Granted
Application number
CA002675270A
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French (fr)
Other versions
CA2675270C (en
Inventor
Eric E. Mcclain
David Gavia
Lane E. Snell
Jason E. Hoines
Matthew R. Isbell
Michael L. Doster
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Baker Hughes Holdings LLC
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Individual
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39522408&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2675270(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2675270A1 publication Critical patent/CA2675270A1/en
Application granted granted Critical
Publication of CA2675270C publication Critical patent/CA2675270C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

A rotary drag bit includes a primary cutter row (141) comprising at least one primary cutter, and at least two additional cutters configured relative to one another (19, 20, 21). In one embodiment, the cutters are backup cutters of a cutter group located in respective first and second trailing cutter rows (153), oriented relative to one another, and positioned to substantially follow the at least one primary cutter The rotary drag bit life is extended by the backup cutter group, making the bit more durable and extending the life of the cutters In other of the embodiments, the cutters are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters Still other embodiments of rotary drag bits include backup cutter configurations having different backrake angles and siderake angles, including methods therefor.

Claims (14)

1. A rotary drag bit (110), comprising:
a bit body (111) with a face (112), and an axis (161):
at least one blade (132) extending radially over the face (112), the blade (132) having a cone region (160), nose region (162), flank region (163), shoulder region (164), and a gage region (165);
a primary cutter row (141) comprising at least one primary cutter (19) having a first diameter, the at least one primary cutter (19) including a cutting surface protruding at least partially from the blade (132), located to traverse a cutting path upon rotation of the bit body (111) about the axis (161), and configured to engage a formation upon movement along the cutting path, the primary cutter (19) located in one of the cone region (160), nose region (162), flank region (163), shoulder region (164), and a gage region (165);
a backup cutter row (151) comprising a plurality of backup cutters located on the blade (132) comprising a first backup cutter (20) having a second diameter smaller than that of the first diameter of the at least one primary cutter (19) rotationally following the at least one primary cutter (19), and a second backup cutter (21) having a third diameter smaller than that of the first backup cutter (20) oriented differently than the first backup cutter (20), the first backup cutter (20) and the second backup cutter (21) including a cutting surface protruding at least partially from the blade (132), configured to conditionally engage a formation upon movement along the cutting path, the first backup cutter (20) and the second backup cutter (21) located in one of the nose region (162), flank region (163), and shoulder region (164).
2. The rotary drag bit (110) of claim 1, wherein the second backup cutter (21) has a different backrake angle than the first backup cutter (20).
3. The rotary drag bit (110) of claim 1, wherein the second backup cutter (21) has a different backrake angle and siderake angle than the first backup cutter (21).
4. The rotary drag bit (110) of claim 1, wherein the backup cutter row characterized in that a third backup cutter (57) oriented with respect to either of the first backup cutter (20) and the second backup cutter (21).
5. The rotary drag bit (110) of claim 1, wherein the second backup cutter (21) is underexposed to a greater extent than the first backup cutter (20).
6. The rotary drag bit (110) of claim 1, wherein the second backup cutter (21) is underexposed to a lesser extent than the first backup cutter (20).
7. The rotary drag bit (110) of claim 1, wherein the second backup cutter (21) is configured to rotationally follow a cutting path of another primary cutter (28).
8. The rotary drag bit (110) of claim 1, further characterized in that: a backup cutter group (152) comprising a first trailing cutter row (154) and a second trailing cutter row (155), the first trailing cutter row (154) comprising the first backup cutter (12), and the second trailing cutter row (155) comprising the second backup cutter (21).
9. The rotary drag bit (110) of claim 8, wherein the first backup cutter (12) of the first trailing cutter row (154) is oriented at a different backrake angle from a backrake angle of the second backup cutter (21) of the second trailing cutter row (155).
10. The rotary drag bit (110) of claim 8, wherein t the first backup cutter (12) of the first trailing cutter row (154) is oriented at a different backrake angle and a different siderake angle from a backrake angle and a siderake angle of the second backup cutter (21) of the second trailing cutter row (155).
11. The rotary drag bit (110) of claim 10, wherein the first backup cutter (12) of the first trailing cutter row (154) is underexposed with respect to an exposure of the at least one primary cutter (19).
12. The rotary drag bit (110) of claim 10, wherein the second backup cutter (21) of the second trailing cutter row (155) is underexposed with respect to an exposure of the first backup cutter (12) of the first trailing cutter row (154).
13. The rotary drag bit (110) of claim 1, wherein the blade (132) is a primary blade comprising a blade surface and a leading face (112), the primary cutter row (141) being aligned substantially along the leading face (112).
14. The rotary drag bit (110) of claim 8, wherein the first and second cutters (12,21) of the first and second trailing cutter rows (154,155) have cutting surfaces with smaller exposures than an exposure of the cutting surface of the at least one primary cutter (19).

17. The rotary drag bit (110) of claim 1, wherein the at least one primary cutter (19) and the plurality of backup cutters (20,21,57) are polycrystalline diamond compact cutters.

18. A method of designing a rotary drag bit (110), characterized in that :
configuring a bit body (111) having a face (112), an axis (161), at least one blade (141) extending radially over the face (112), the blade (132) having a cone region (160), nose region (162), flank region (163), shoulder region (164), gage region (165), and a plurality of primary cutters, each primary cutter (11, 19) of the plurality of primary cutters having a first diameter including a cutting surface protruding at least partially from the blade (141), located to traverse a cutting path upon rotation of the bit body (111) about the axis (161), and configured to engage a formation upon movement along the cutting path;
configuring a first backup cutter (12) located on the blade (132) having a second diameter smaller than that of the first diameter of the primary cutter (19) located in one of the nose region (162), the flank region (163) and the shoulder region (164) rotationally trailing a primary cutter (19)of the plurality of primary cutters, the first backup cutter (12) including a first siderake angle, a first backrake angle, and a cutting surface protruding at least partially from the blade (132), configured to conditionally engage a formation upon movement along the cutting path; and configuring a second backup cutter (21)located on the blade (132) having a third diameter smaller than that of the second diameter of the first backup cutter (12)located in one of the nose region (162), the shoulder region (163) and the flank region (164) rotationally following another primary cutter (19) of the plurality of primary cutters, the second backup cutter (21) including a different second siderake angle than the first siderake angle, a different second backrake angle than the first backrake angle, and a cutting surface protruding at least partially from the blade (132), configured to conditionally engage a formation upon movement along the cutting path.

19. The method of claim 18, wherein the second backup cutter (21) is configured to protrude from another blade (131, 132, 133) relative to the primary cutter (11, 19).

20. The method of claim 18, further characterized in that configuring the second backup cutter (21) underexpose to a lesser extent than the first backup cutter (12).
CA2675270A 2007-01-25 2008-01-25 Rotary drag bit and methods therefor Expired - Fee Related CA2675270C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US89745707P 2007-01-25 2007-01-25
US60/897,457 2007-01-25
PCT/US2008/052128 WO2008092130A1 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor

Publications (2)

Publication Number Publication Date
CA2675270A1 true CA2675270A1 (en) 2008-07-31
CA2675270C CA2675270C (en) 2012-05-22

Family

ID=39522408

Family Applications (3)

Application Number Title Priority Date Filing Date
CA2675070A Expired - Fee Related CA2675070C (en) 2007-01-25 2008-01-24 Rotary drag bit
CA002675269A Abandoned CA2675269A1 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor
CA2675270A Expired - Fee Related CA2675270C (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2675070A Expired - Fee Related CA2675070C (en) 2007-01-25 2008-01-24 Rotary drag bit
CA002675269A Abandoned CA2675269A1 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor

Country Status (6)

Country Link
US (3) US7861809B2 (en)
EP (3) EP2118430A2 (en)
CN (3) CN101622421A (en)
CA (3) CA2675070C (en)
RU (2) RU2009131831A (en)
WO (3) WO2008091654A2 (en)

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WO2008091654B1 (en) 2008-12-11
US7762355B2 (en) 2010-07-27
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US7861809B2 (en) 2011-01-04
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US20080179107A1 (en) 2008-07-31
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CA2675270C (en) 2012-05-22
CA2675269A1 (en) 2008-07-31
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US20080179106A1 (en) 2008-07-31
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US20080179108A1 (en) 2008-07-31
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WO2008091654A3 (en) 2008-09-18
EP2111494A2 (en) 2009-10-28

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