Injection valve and method

Details Injection valve and method Injection valve and method

2006-08-30

2008-11-25

Bagnell, David J (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S386000, C166S321000, C166S332800

Reexamination Certificate

active

07455116

ABSTRACT:
The present invention generally relates to controlling the flow of fluids in a wellbore. In one aspect, a valve for selectively closing a flow path through a wellbore in a first direction is provided. The valve includes a body and a piston surface formable across the flow path in the first direction. The piston surface is formed at an end of a shiftable member annularly disposed in the body. The valve further includes a flapper member, the flapper member closable to seal the flow path when the shiftable member moves from a first position to a second position due to fluid flow acting on the piston surface. In another aspect, a valve for selectively closing a flow path through a wellbore in a single direction is provided. In yet another aspect, a method for selectively closing a flow path through a wellbore in a first direction is provided.

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