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1. (WO2009123918) SYSTEM AND METHOD FOR ONE-TRIP HOLE ENLARGEMENT OPERATIONS

Pub. No.:    WO/2009/123918    International Application No.:    PCT/US2009/038486
Publication Date: Oct 8, 2009 International Filing Date: Mar 27, 2009
IPC: E21B 7/28
Applicants: HALLIBURTON ENERGY SERVICES, INC.
SERVAES, Luk
MANCINI, Stefano
Inventors: SERVAES, Luk
MANCINI, Stefano
Title: SYSTEM AND METHOD FOR ONE-TRIP HOLE ENLARGEMENT OPERATIONS
Abstract:
A drilling assembly for simultaneous hole enlargement operations comprises a drill bit, an adjustable diameter reamer, and a hole opener. The reamer is coupled with, and positioned uphole from the drill bit. The reamer is adjustable between a first diameter and a second diameter that is larger than the first diameter. The hole opener is coupled with, and positioned uphole from the reamer.