Baker Hughes Corporation

Lawrence Allen Sinor

Roger W Fincher

Jeffrey B Lund

Jack Thomas Oldham

Mark William Dykstra

Christopher C Beuershausen

Robert A Laing

Rustom K Mody

Daniel R Hart

Rudolf C O Pessier

Roy E Swanson

Roland Illerhaus

Trung Quoc Huynh

Calvin Stowe, Ii

A method and apparatus for running a whipstock into a well bore attached to a combination mill and drill bit, releasing the mill/bit from the whipstock, milling a window in the casing, and drilling a lateral well bore, all in one trip. The mill/bit is provided with a primary cutting structure better suited for milling through the casing, and a secondary cutting structure, better suited for drilling through the earth formation. The secondary cutting structure is initially smaller in diameter than the primary cutting structure. The whipstock can be attached to the mill/bit with a shear bolt supported by a boss on the whipstock, with the boss designed to arrest axial motion of the mill/bit after shearing of the bolt.

Window mill and drill bit

A superabrasive cutter-equipped rotary drag bit especially suitable for directional drilling in subterranean formations is provided. The bit may employ PDC cutters in an engineered cutter placement profile exhibiting optimal aggressiveness in relation to where the cutters are positioned along the profile of the bit extending from a cone region laterally, or radially, outward toward a gage region therefore. The engineered cutter placement profile may include cutters exhibiting differing degrees of aggressiveness positioned in order to maximize rate-of-penetration and minimize torque-on-bit while maintaining side cutting capability and steerability.

Rotary drill bits exhibiting cutting element placement for optimizing bit torque and cutter life

Growing community of inventors

Conroe, TX, United States of America

Lawrence Allen Sinor