Method of drilling a bore hole

Details Method of drilling a bore hole Method of drilling a bore hole

2007-10-22

2009-08-11

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Processes

C175S040000

Reexamination Certificate

active

07571778

ABSTRACT:
A method to drill a borehole includes drilling the borehole through an overburden with a drill bit selected to optimize a drilling performance parameter and drilling the borehole through a production zone with another drill bit selected to optimize a production performance parameter.

REFERENCES:
patent: 1873757 (1932-08-01), Gilman
patent: 4373592 (1983-02-01), Dellinger et al.
patent: 4883132 (1989-11-01), Tibbitts
patent: 6070677 (2000-06-01), Johnston, Jr.
patent: 6109368 (2000-08-01), Goldman et al.
patent: 7284623 (2007-10-01), Rock
patent: 2004/0143427 (2004-07-01), Huang et al.

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