WO2008092113B1 - Rotary drag bit and methods therefor - Google Patents

Rotary drag bit and methods therefor

Info

Publication number
WO2008092113B1
WO2008092113B1 PCT/US2008/052108 US2008052108W WO2008092113B1 WO 2008092113 B1 WO2008092113 B1 WO 2008092113B1 US 2008052108 W US2008052108 W US 2008052108W WO 2008092113 B1 WO2008092113 B1 WO 2008092113B1
Authority
WO
WIPO (PCT)
Prior art keywords
cutter
backup
cutters
amended
corresponding primary
Prior art date
Application number
PCT/US2008/052108
Other languages
French (fr)
Other versions
WO2008092113A2 (en
WO2008092113A3 (en
Inventor
Michael L Doster
Original Assignee
Baker Hughes Inc
Michael L Doster
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
Family has litigation
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=WO2008092113(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Baker Hughes Inc, Michael L Doster filed Critical Baker Hughes Inc
Priority to CA002675269A priority Critical patent/CA2675269A1/en
Priority to EP08728331A priority patent/EP2111494A2/en
Publication of WO2008092113A2 publication Critical patent/WO2008092113A2/en
Publication of WO2008092113A3 publication Critical patent/WO2008092113A3/en
Publication of WO2008092113B1 publication Critical patent/WO2008092113B1/en

Links

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 bit body having a face and an axis, a plurality of blades extending radially and longitudinally outward from the face, and at least one split cutter set. The split cutter set includes a plurality of cutters, where at least two of the cutters are primary and 'or kerfing cutters located on different blades of the plurality of blades. The pair of primary and/or kerfing cutters of the split cutter set may be located substantially the same radial distance from a center line, or axis of rotation, of the bit and located at substantially the same longitude, or elevation, on the bit as one another, or follow substantially the same rotational or helical cutting path as each other. In addition, at least one backup cutter may be located substantially the same radial distance from a center line, or axis of rotation, of the bit and located at substantially the same longitude, or elevation, on the bit as one or both primary and/or kerfing cutters, or follow substantially the same rotational or helical path as one or both of the primary and/or kerfing cutters. The cutters of a split cutter set may be configured and oriented to provide improved bit life and reduced stress upon the cutters. Other embodiments of rotary drag bits are also provided, including methods therefor.

Claims

AMENDED CLAIMS received by the International Bureau on 04 September 2008 (04.09.2008)
What is claimed is:
1. (Amended) A rotary drag bit (810), characterized in that : a bit body with a face and an axis (C/L) ; a plurality of blades (831,831 ',832'832',833,833') extending radially outward over the face, each blade having a cone region (160), nose region (162), flank region (163), shoulder region (164), and gage region (165); and at least one split cutter set (820) comprising a plurality of polycrystalline diamond compact cutters (814) located on one of the nose region (162), the flank region (163), and the shoulder region (164) at a radius from the axis (C/L), at least two cutters (814) of the plurality of cutters being primary cutters located on different blades of the plurality of blades (831,831',832'832',833,833') to substantially traverse a common cutting path upon rotation of the bit body about the axis (C/L), each cutter of the plurality of cutters (814) includes a cutting surface protruding at least partially from one blade of the plurality of blades (831,83r,832'832%833,833') configured to conditionally engage a formation upon movement along the cutting path, the split cutter set (820) including at least one backup cutter (24) located at the radius from the axis (C/L) having a cutting surface protruding at least partially from one of the plurality of blades (831,831',832'832',833,833') located to substantially traverse the common cutting path upon rotation of the bit body about the axis (C/L) configured to selectively engage a formation upon movement along the cutting path, a primary cutter and a backup cutter of the split cutter set located on the same blade of the plurality of blades (831,831',832'832',833,833').
2. (Amended) The rotary drag bit (810) of claim 1, wherein the plurality of blades (831,831',832'832',833,833') comprises at least one primary blade (831) and at least one secondary blade (831').
3. (Amended) The rotary drag bit (810) of claim 1, wherein the at least one split cutter set (820) comprises at least one of an opposing kerfing and backup cutter set
27 (23, 24,25,26), a trailing kerfing (821) and leading backup cutter set (822), an opposing kerfing and leading backup cutter set (23,24,25,26), a trailing kerfing and trailing backup cutter set (23,24,25,26), and an opposing kerfing and trailing backup cutter set (23,24,25,26).
4. (Amended) The rotary drag bit (810) of claim 1, wherein the at least one split cutter set (820) is configured with at least one cutter of the at least two cutters rotationally trailing another cutter of the at least two cutters.
5. (Amended) The rotary drag bit (810) of claim 1, wherein the at least one split cutter set (820) is configured with at least one cutter of the at least two cutters rotationally opposing another cutter of the at least two cutters.
7. (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one backup cutter (24) comprises a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally trail a corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally trail another corresponding primary cutter (25).
8. (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one backup cutter (24) comprises a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally oppose a corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally oppose another corresponding primary cutter (25).
9. (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one backup cutter (24) comprises a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally lead a corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally lead another corresponding primary cutter (25).
10. (Amended) The rotary drag bit (810 of claim 1 , wherein the at least one backup cutter (24) protrudes at least partially from one of the plurality of blades (831,831 ',832' 832',833,833 ') rotationally trailing, opposing, or leading another of the plurality of blades (831,831',832'832',833,833') comprising at least one of the primary cutters of the split cutter set (820).
11 (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one backup cutter (24) is underexposed relative to either of the primary cutters of the split cutter set (820).
12. (Amended) The rotary drag bit (810) of claim 1, wherein the at least one split cutter set (820) comprises a plurality of primary cutters and a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally trail a first corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally trail a second corresponding primary cutter (25).
13. (Amended) The rotary drag bit (810) of claim 12, wherein the at least one backup cutter (24) is located on different blade from the first corresponding primary cutter (23), and the at least another backup cutter (26) is located on different blade from the second corresponding primary cutter (25).
14. (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one split cutter set (820) comprises a plurality of primary cutters and a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally oppose a first corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally oppose a second corresponding primary cutter (25).
15. (Amended) The rotary drag bit (810) of claim 14, wherein the at least one backup cutter (24) is located on different blade from the first corresponding primary cutter (23), and the at least another backup cutter (26) is located on different blade from the second corresponding primary cutter (25).
29
16. (Amended) The rotary drag bit (810) of claim 1 , wherein the at least one split cutter set (820) comprises a plurality of primary cutters and a plurality of backup cutters, at least one backup cutter (24) of the plurality of backup cutters configured to rotationally follow a first corresponding primary cutter (23), and at least another backup cutter (26) of the plurality of backup cutters configured to rotationally follow a second corresponding primary cutter (25), the first corresponding primary cutter (23) configured to rotationally trail the second corresponding primary cutter (25).
17. (Amended) The rotary drag bit (810) of claim 16, wherein the at least one backup cutter (24) is located on the same blade as the at least another backup cutter (26) and located on different blade from the first corresponding primary cutter (23), and the at least another backup cutter (26) is located on different blade from the second corresponding primary cutter (25).
19. (Amended) A method ofdesigning a rotary drag bit (810), comprising: configuring a bit body having a face and an axis (C/L), and a plurality of blades
(831,831 ',832'832',833,833') extending radially outward over the face; and configuring at least one split cutter set (820) comprising a plurality of cutters on the plurality of blades (831,831',832'832>,833,833'), at least two cutters of the plurality of cutters located on different blades of the plurality of blades
(831,831 ',832'832',833,833'), each cutter of the plurality of cutters includes a cutting surface protruding at least partially from one of the plurality of blades (831,831 ',832' 832',833,833') and located to substantially traverse a common cutting path upon rotation of the bit body about the axis, and configured to engage a formation upon movement along the cutting path, wherein configuring the at least one split cutter set (820) comprises configuring at least one of an opposing kerfing and backup cutter set (23,24,25,26), a trailing kerfing (821) and leading backup cutter set (822), an opposing kerfing and leading backup cutter set (23,24,25,26), a trailing kerfing and trailing backup cutter set (23,24,25,26), and an opposing kerfing and trailing backup cutter set (23,24,25 ,26) .
30
PCT/US2008/052108 2007-01-25 2008-01-25 Rotary drag bit and methods therefor WO2008092113A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002675269A CA2675269A1 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor
EP08728331A EP2111494A2 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89745707P 2007-01-25 2007-01-25
US60/897,457 2007-01-25

Publications (3)

Publication Number Publication Date
WO2008092113A2 WO2008092113A2 (en) 2008-07-31
WO2008092113A3 WO2008092113A3 (en) 2008-09-12
WO2008092113B1 true WO2008092113B1 (en) 2008-10-23

Family

ID=39522408

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/US2008/000914 WO2008091654A2 (en) 2007-01-25 2008-01-24 Rotary drag bit
PCT/US2008/052108 WO2008092113A2 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor
PCT/US2008/052128 WO2008092130A1 (en) 2007-01-25 2008-01-25 Rotary drag bit and methods therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/US2008/000914 WO2008091654A2 (en) 2007-01-25 2008-01-24 Rotary drag bit

Family Applications After (1)

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

Country Status (6)

Country Link
US (3) US20080179107A1 (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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EP2111494A2 (en) 2009-10-28
CA2675070C (en) 2012-05-29
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CA2675270A1 (en) 2008-07-31
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CA2675070A1 (en) 2008-07-31
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WO2008092130B1 (en) 2008-10-23
WO2008092113A2 (en) 2008-07-31
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WO2008091654B1 (en) 2008-12-11
US7861809B2 (en) 2011-01-04
US7762355B2 (en) 2010-07-27
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WO2008091654A2 (en) 2008-07-31
US20080179106A1 (en) 2008-07-31
CN101622422A (en) 2010-01-06
US20080179107A1 (en) 2008-07-31
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WO2008092113A3 (en) 2008-09-12
WO2008092130A1 (en) 2008-07-31

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