Method for drilling with casing

Details Method for drilling with casing Method for drilling with casing

2008-09-18

2009-12-01

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

With installing casing

C166S380000, C166S381000

Reexamination Certificate

active

07624820

ABSTRACT:
A method for drilling boreholes using casing as the drill string and for removing a drilling assembly from the wellbore while leaving the casing in the well bore. In the method, the drilling assembly is prepared for removal from the wellbore by launching a release tool and manipulating the drilling assembly using the release tool.

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