Mill starting device and method

Details Mill starting device and method Mill starting device and method

1995-03-24

1998-03-10

Schoeppel, Roger J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

166 50, 1661175, 166384, E21B 704

Patent

active

057250600

ABSTRACT:
A mill starting device for use in a pipestring in a wellbore which provides an inclined wall for guiding the mill to a shoulder stop so that when the mill is operated it preferentially bites into the shoulder stop and a method for using the device together with coiled tubing for forming a window in a subsurface well conduit.

REFERENCES:
patent: 5188190 (1993-02-01), Skaalure
patent: 5211715 (1993-05-01), Braden et al.
patent: 5277251 (1994-01-01), Blount et al.
patent: 5287921 (1994-02-01), Blount et al.
patent: 5427179 (1995-06-01), Bailey et al.

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