Patent ID: 9624755
Date: 2017-04-18
CPC Classifications: E21B

Claim:
1. A wireline retrievable injection valve comprising: a valve body having an inlet and outlet; a flapper valve element pivotably mounted in a lower portion of the valve body; and an axially movable valve assembly positioned within the valve body upstream of the flapper valve element and including a second valve and a sleeve, the sleeve adapted to move the flapper valve element to an open position when the valve assembly moves in a downwardly direction in response to fluid flow through the valve, wherein the valve assembly includes a stationary body and an axially movable nozzle which together form a variable annular fluid passageway, wherein movement of the sleeve is resisted by a spring and movement of the second valve is resisted by a second spring, the strengths of the springs being such that upon initial flow the sleeve will move to open the flapper valve element while the second valve remain closed.