Section milling tool

Details Section milling tool Section milling tool

1990-01-16

1991-05-28

Britts, Ramon S.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 558, 175269, E21B 2900

Patent

active

050185802

ABSTRACT:
A milling machine is set forth for operation on a pipe string in a cased well to mill the casing. In one embodiment, an inner mandrel having a shoulder is aligned relative to a set of first cutters which are retracted. They are radially extended through slots in an outer body for cutting operations when the pipe string is rotated. Extension is accomplished by raising pump pressure to move an inner mandrel having a shoulder juxtapositioned relative to the cutters. In an alternate embodiment, the inner mandrel has two shoulders which cooperate with two separate sets of cutters wherein the first set is fully extended and the second set in only partially extended. The coil spring controlling the shoulder for the second set of cutters. The lower end of the tool body includes a constricted outlet orifice for mud flow and an alternate pathway through the inner mandrel and outer body is provided to flush cuttings and chips from the cutters.

REFERENCES:
patent: 3126065 (1964-03-01), Chadderdon
patent: 3376927 (1968-04-01), Brown
patent: 4047568 (1977-09-01), Aulenbacher

Affiliated with

Also associated with

Rating

Section milling tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Section milling tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Section milling tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-28544