Restriction subs for setting cement plugs in wells

Details Restriction subs for setting cement plugs in wells Restriction subs for setting cement plugs in wells

1988-10-26

1990-03-13

Kisliuk, Bruce M.

Wells

With below and above ground modification

Head for tool, piston or cleaner

166154, 166242, 166255, 166318, 137553, 137557, E21B 3305, E21B 2310, E21B 4709

Patent

active

049076493

ABSTRACT:
In accordance with illustrative embodiments of the present invention, restriction subs for use in setting cement plugs in wells include a tubular threaded adapter having an internal annular recess, and a metal restriction sleeve mount in such recess. In one embodiment, the sleeve has a corrugation that extends into the bore of the adapter to provide a deformable restriction; in another embodiment the sleeve has curved resilient tabs whose free ends extend into such bore. The restrictions are cooperable with a displacement plug having a metal expander member on its nose so that a distinct pressure is required to cause the expander member and plug to be forced through the restriction.

REFERENCES:
patent: 1791874 (1931-02-01), Rodgers
patent: 2301389 (1942-11-01), Farris
patent: 3915226 (1975-10-01), Savage
patent: 4164980 (1979-08-01), Duke
patent: 4246967 (1981-01-01), Harris
patent: 4378838 (1983-04-01), Ogden et al.
patent: 4427065 (1984-01-01), Watson
patent: 4510994 (1985-04-01), Pringle
patent: 4674573 (1987-06-01), Bode

Affiliated with

Also associated with

Rating

Restriction subs for setting cement plugs in wells does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Restriction subs for setting cement plugs in wells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Restriction subs for setting cement plugs in wells will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-45749