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1. (WO2018204123) STEPPED DOWNHOLE TOOLS AND METHODS OF USE

Pub. No.:    WO/2018/204123    International Application No.:    PCT/US2018/029000
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: E21B 10/43
E21B 10/54
E21B 10/42
Applicants: SMITH INTERNATIONAL, INC.
Inventors: AZAR, Michael George
DOWNTON, Geoffrey Charles
PARKIN, Edward George
Title: STEPPED DOWNHOLE TOOLS AND METHODS OF USE
Abstract:
A downhole tool includes at least a pilot section, a first expansion section, and a second expansion section. The pilot section has a plurality of cutting elements to cut a pilot hole. Each of the expansion sections has a plurality of cutting elements to successively expand the pilot hole to achieve a final wellbore radius. The pilot section, first expansion section, and second expansion section each have one or more stabilizer pads on respective gages to stabilize the downhole tool during wellbore creation.