Restriction sub with deformable plastic sleeve

Details Restriction sub with deformable plastic sleeve Restriction sub with deformable plastic sleeve

1992-03-09

1993-01-12

Britts, Ramon S.

Wells

With below and above ground modification

Head for tool, piston or cleaner

166154, 166242, E21B 3305, E21B 2310, E21B 4709

Patent

active

051782146

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a restriction sub apparatus for use during well cementing operations includes a tubular body having an internal annular recess, and a plastic restriction sleeve mounted in the recess, such sleeve having an inner diameter which is less than the inner diameter of the body so that when a drive plate on a cement displacement plug encounters the inner portion of the sleeve during downward movement, such inner portion is progressively deformed and bulged inward until the bulge dissipates into a recessed region near the bottom end of the sleeve. The resistance afforded by the plastic sleeve to downward movement of the plug provides a positive pressure surge indication at the surface that the plug is located at a particular depth in the casing.

REFERENCES:
patent: 4067386 (1978-01-01), Weise
patent: 4427065 (1984-01-01), Watson
patent: 4674573 (1987-06-01), Bode
patent: 4756365 (1988-07-01), Schneider
patent: 4907649 (1990-03-01), Bode
patent: 5092402 (1992-03-01), Perricone et al.

Affiliated with

Also associated with

Rating

Restriction sub with deformable plastic sleeve 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 sub with deformable plastic sleeve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Restriction sub with deformable plastic sleeve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1214063