Title:
ROTATIONAL DRILL BITS AND DRILLING APPARATUSES INCLUDING THE SAME
Document Type and Number:
WIPO Patent Application WO/2010/104793
Kind Code:
A3
Abstract:
A rotary drill bit for drilling formations in dry-drilling environments is disclosed. The rotary drill bit may include a bit body rotatable about a central axis. The rotary drill bit may also include at least one cutting element coupled to the bit body. The at least one cutting element may have a cutting face, a cutting edge adjacent the cutting face, and a back surface opposite the cutting face. The at least one cutting element may be oriented so that a substantial portion of the cutting edge has a positive clearance angle, which may be defined by a first vector that is normal to the cutting face and a second vector that is tangential to a helical path traveled by the cutting edge during drilling.
Inventors:
COX E SEAN (US)
MEYERS RUSSELL ROY (US)
MEYERS RUSSELL ROY (US)
Application Number:
PCT/US2010/026528
Publication Date:
February 24, 2011
Filing Date:
March 08, 2010
Export Citation:
Assignee:
DOVER BMCS ACQUISITION CORP (US)
COX E SEAN (US)
MEYERS RUSSELL ROY (US)
COX E SEAN (US)
MEYERS RUSSELL ROY (US)
International Classes:
E21B10/43; E21B10/55; E21B10/567
Foreign References:
| EP1170460A2 | 2002-01-09 | |||
| US5303787A | 1994-04-19 | |||
| US4194790A | 1980-03-25 | |||
| US3251425A | 1966-05-17 | |||
| GB2355035A | 2001-04-11 | |||
| US2819043A | 1958-01-07 | |||
| US20040163854A1 | 2004-08-26 | |||
| US4354559A | 1982-10-19 | |||
| US4550791A | 1985-11-05 | |||
| GB2370300A | 2002-06-26 |
Attorney, Agent or Firm:
LEE, Jonathan, R. (922 West Baxter DriveSuite 10, South Jordan Utah, US)
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