Title:
METHOD AND APPARTUS FOR CUTTING EARTHEN FORMATIONS
Document Type and Number:
WIPO Patent Application WO2004106693
Kind Code:
A3
Abstract:
A cutter element (310) is provided for use on a rotary drill bit of a drilling string to cut earthen formation and the like. The cutter element (310) includes a cutting portion (322) formed from cutting material adapted to cut into the earthen formation, and a substrate (324) positioned adjacent the cutting portion (322). The cutting portion (322) and the substrate (324) form a body having a substantially planar front face (320), a longitudinal axis extending centrally through the front face (320) and the substrate (324), and a circumferential surface extending inwardly form the front face (320) and spaced outwardly from the longitudinal axis. The cutting portion (322) includes a cutting face that provides at least a portion of the front face (320). The cutting portion (322) extends longitudinally inward from the front face (320) to a back surface (320A) engaging or interfacing the substrate (324). Thus, a distinct, longitudinally extending volume of cutting material is provided and includes a predesignated portion (350) of the circumferential surface that extends from the cutting face (320) to the back surface (320A), the circumferential surface portion being predesignated for wearing contact with the earthen formation.
Inventors:
TIBBITTS GORDON (US)
Application Number:
PCT/US2004/016987
Publication Date:
March 03, 2005
Filing Date:
May 27, 2004
Export Citation:
Assignee:
PARTICLE DRILLING INC (US)
TIBBITTS GORDON (US)
TIBBITTS GORDON (US)
International Classes:
E21B10/46; E21B10/567; E21B10/573; E21B; (IPC1-7): E21B10/46
Foreign References:
| US5881830A | 1999-03-16 | |||
| US6003623A | 1999-12-21 |
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