Liner wiper plug apparatus and method

Details Liner wiper plug apparatus and method Liner wiper plug apparatus and method

1996-07-29

1998-09-08

Dang, Hoang C.

Wells

Processes

Cementing, plugging or consolidating

166155, 166317, 1663328, E21B 3316

Patent

active

058031731

ABSTRACT:
An apparatus and method are disclosed for pumping segregated fluids through a tubular member, such as is required when cementing a liner into a well bore. A liner wiper plug has an internal bore formed therethrough, with a flapper valve mounted in the liner wiper plug. The flapper valve can pivot to an open position to allow fluid flow through the wiper plug, and the flapper valve can pivot to a closed position to prevent fluid flow through the wiper plug. A work string, or a stinger attached to a work string, can be positioned within the internal bore of the wiper plug, holding the flapper valve in the open position. The wiper plug can be run into the well on the work string, with the flapper valve held open, and with flow of a first fluid in progress. The wiper plug can be releasably supported from the liner. The work string is withdrawn from the wiper plug to allow the flapper valve to close. Pumping a second fluid through the work string to apply fluid pressure to the wiper plug will then release the wiper plug from the liner and force the wiper plug to pass through the liner as desired, segregating the two fluids.

REFERENCES:
patent: 2101640 (1937-12-01), Chonette et al.
patent: 3087551 (1963-04-01), Kerver
patent: 3616850 (1971-11-01), Scott
patent: 3796260 (1974-03-01), Bradley
patent: 4164980 (1979-08-01), Duke
patent: 4541484 (1985-09-01), Salerni et al.
patent: 4691775 (1987-09-01), Lustig et al.
patent: 4809776 (1989-03-01), Bradley
patent: 4842069 (1989-06-01), Baugh et al.
patent: 4934452 (1990-06-01), Bradley
patent: 5012867 (1991-05-01), Kilgore
patent: 5018579 (1991-05-01), Braddick et al.
patent: 5020597 (1991-06-01), Braddick et al.
patent: 5036922 (1991-08-01), Braddick
patent: 5052488 (1991-10-01), Fraser
patent: 5191932 (1993-03-01), Seefried et al.
patent: 5392852 (1995-02-01), Laurel et al.

Affiliated with

Also associated with

Rating

Liner wiper plug apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liner wiper plug apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liner wiper plug apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1273347