Plug apparatus and method for cementing a liner in a well bore

Details Plug apparatus and method for cementing a liner in a well bore Plug apparatus and method for cementing a liner in a well bore

1990-01-31

1991-10-01

Neuder, William P.

Wells

Processes

Cementing, plugging or consolidating

166291, 166155, 166156, E21B 3316

Patent

active

050524887

ABSTRACT:
The present invention provides an apparatus for cementing a liner string in a well bore. The apparatus comprises an operating string having a smaller diameter than the internal diameter of the liner string which is insertable therein. The operating string is connected within the internal diameter of the liner string and may be operated by rotation of the operating string to release the string from the liner. A plug is connected to the lower end of the operating string and has a top plug which is releasably supported from the plug carrying body together with a longitudinally spaced bottom plug which is releasably supported from the top plug. The top plug is pressure releasable relative to the plug carrying body, as is the bottom plug to the top plug, and a retainer on the bottom plug, respectively. A shift is provided for locking the top plug to the plug carrying body until the bottom plug is released by application of pressure. A mechanical lock is provided to secure the retainer means relative to the bottom plug to prevent inadvertent release prior to release by application of pressure.

REFERENCES:
patent: 3635288 (1972-01-01), Lebourg
patent: 3730267 (1973-05-01), Scott
patent: 4624312 (1986-11-01), McMullin
patent: 4842069 (1989-06-01), Baugh et al.

Affiliated with

Also associated with

Rating

Plug apparatus and method for cementing a liner in a well bore does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Plug apparatus and method for cementing a liner in a well bore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plug apparatus and method for cementing a liner in a well bore will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1748322