Title:
CASING AND LINER DRILLING BITS, CUTTING ELEMENTS THEREFOR, AND METHODS OF USE
Document Type and Number:
WIPO Patent Application WO2005080742
Kind Code:
B1
Abstract:
A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element are disclosed. Differing abrasive material amount, characteristics, and size of cutting elements are disclosed. Telescoping casing sections and bits are disclosed. Aspects and embodiments are disclosed including: at least one gage section extending from the nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.
Inventors:
OLDHAM JACK T
SINOR L ALLEN
MCCLAIN ERIC E
LAING ROBERT A
TURNER EVAN C
DYKSTRA MARK W
SULLIVAN ERIC C
SINOR L ALLEN
MCCLAIN ERIC E
LAING ROBERT A
TURNER EVAN C
DYKSTRA MARK W
SULLIVAN ERIC C
Application Number:
PCT/US2005/004106
Publication Date:
October 27, 2005
Filing Date:
February 10, 2005
Export Citation:
Assignee:
BAKER HUGHES INC (US)
International Classes:
E21B7/20; E21B10/26; E21B10/54; E21B10/55; E21B10/56; E21B10/567; E21B17/07; E21B17/14; (IPC1-7): E21B10/54; E21B7/20; E21B17/14; E21B10/26; E21B10/56; E21B17/07
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