Self activating, positively driven concealed core catcher

Details Self activating, positively driven concealed core catcher Self activating, positively driven concealed core catcher

1984-08-31

1986-08-19

Levy, Stuart S.

Boring or penetrating the earth

Processes

Sampling of earth formations

175250, 175251, E21B 2500, E21B 4902

Patent

active

046064168

ABSTRACT:
A core spring type core catcher and a full closure core catcher are completely concealed from the core within a coring tool. The full closure catcher is reliably actuated to assume a closed configuration without dependence upon gravity or an interference diametrical fit with the core by use of a cam ring which is longitudinally displaced downwardly within the core barrel by a preloaded compression spring. The full closure core catcher is comprised of a plurality of flapper valves circumferentially disposed outside of the inner tube and concealed by the inner tube or a terminal extension of the inner tube. Disposed above the plurality of flapper valves, and also circumferentially disposed outside of and concentric with the inner tube is a cam ring. Similarly circumferentially disposed outside of and concentric with the inner tube is a preloaded coil compression spring bearing against the cam ring. The cam ring in turn is in sliding contact with a rear surface of each one of the plurality of flapper valves. When the inner tube is longitudinally displaced with respect to the flapper valves to uncover the flapper valves, the flapper valves are then rotated inwardly within the inner barrel of the coring tool by virtue of the downward longitudinal drive of the cam ring as powered by the preloaded compression spring.

REFERENCES:
patent: 1373492 (1921-04-01), Dodds
patent: 2221392 (1940-11-01), Baker
patent: 2698737 (1955-01-01), Dean
patent: 3298450 (1967-01-01), Sato
patent: 3878904 (1975-04-01), Dobson

Affiliated with

Also associated with

Rating

Self activating, positively driven concealed core catcher does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self activating, positively driven concealed core catcher, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self activating, positively driven concealed core catcher will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-389882