Method and apparatus for dropping a pump down plug or ball

Details Method and apparatus for dropping a pump down plug or ball Method and apparatus for dropping a pump down plug or ball

2007-12-06

2010-11-30

Dang, Hoang (Department: 3672)

Wells

Processes

Cementing, plugging or consolidating

C166S070000, C166S075150, C166S177400, C166S383000

Reexamination Certificate

active

07841410

ABSTRACT:
An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation.

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