Patent ID: 6158507
Filing Date: 2000-12-12
Classification: E21B

Abstract:
A well screen for positioning in a well bore to screen solid particles from the fluid produced by the well comprising a base pipe, a portion of the wall of which is perforated, said base pipe having threaded end connections for connecting the base pipe into a pipe string, a wire screen surrounding the perforated portion of the base pipe, a first thin porous membrane formed by a layer of cloth made of woven ceramic fibers that is wrapped around the wire screen to filter particles out of well fluid passing through the woven ceramic cloth before the fluid passes through the wire screen and enters the base pipe through the perforations, a sleeve of braided ceramic fibers extending over the layer of woven ceramic fibers, means for holding the ends of the woven ceramic cloth membrane and the sleeve of braided ceramic fibers in sealing engagement with the base pipe, and a perforated tubular metal shroud surrounding the ceramic cloth membranes to protect the membranes from damage as the screen is lowered into a well bore.