Patent ID: 8752631
Filing Date: 2014-06-17
Classification: E21B

Abstract:
1. A valve comprising: an inner mandrel, a piston housing, a top sub, a gage ring, an outer housing, a lower screen, and a guide, wherein the inner mandrel is secured to the piston housing and the piston housing is secured to the top sub to provide a string bore disposed through the inner mandrel, the piston housing and the top sub, and the outer housing is secured to the piston housing to provide an annulus between an inner wall surface of the outer housing and an outer wall surface of the inner mandrel, wherein the gage ring is secured to a lower end of the top sub to provide a piston port in fluid communication with a piston housing bore and an environment disposed outside of the outer housing, the piston housing bore having a piston disposed therein, wherein the piston is operatively associated with a sleeve, the sleeve being in sliding engagement with the outer wall surface of the inner mandrel, the sleeve comprising a sleeve port, wherein a lower end of the outer housing is secured to an upper end of a first screen and a lower end of the first screen is secured to the guide, the guide being fixed to the outer wall surface of the inner mandrel.