Apparatus for injecting displacement plugs

Details Apparatus for injecting displacement plugs Apparatus for injecting displacement plugs

1989-11-15

1991-04-02

Novosad, Stephen J.

Wells

With below and above ground modification

Head for tool, piston or cleaner

166 665, 166113, 166156, 15104062, 137268, E21B 3316

Patent

active

050040480

ABSTRACT:
A displacement plug injection apparatus and manifold for sequentially injecting cementing plugs into the casing in an oil or gas well to reduce contamination of the interface between the well fluid and the cement, which apparatus includes an injection manifold for injecting pick-up balls into the fluid stream which pass through an inlet port in the casing to selectively pick-up cement displacement plugs in a plug set which are suspended or held in place with in the casing to be cemented. A positive mechanical indication of the injection of each pick-up ball is apparent and in adition a secondary magnetic sensor indicates a passage of a pick-up ball into the throat provided above the set of displacement plugs to indicate the beginning of the launch of each plug in the plug set. Also disclosed is a new and improved check valve apparatus for use in float collars and cementing shoes used in casing cementing operations.

REFERENCES:
patent: 2008818 (1935-07-01), Corbett
patent: 2919709 (1960-01-01), Schwegman
patent: 2977617 (1961-04-01), Willis
patent: 3000028 (1961-09-01), Buie et al.
patent: 3028996 (1962-04-01), Ellett
patent: 3089551 (1963-05-01), Greene
patent: 3291217 (1966-12-01), Wakefield, Jr.
patent: 3616850 (1971-11-01), Scott
patent: 3779270 (1973-12-01), Davis
patent: 4047566 (1977-09-01), Duke

Affiliated with

Also associated with

Rating

Apparatus for injecting displacement plugs does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for injecting displacement plugs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for injecting displacement plugs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-322213