Filter for separating discrete solid elements from a fluid stream

摘要: A filter element which is physically capable of withstanding adverse operating conditions in a subterranean environment. The comprises durable, yet fluid pervious casing through particulate carrying radially passed after leaving the substrate. An annular bed within casing, formed metallic fibrous mass defines multitudinous flow passages that retain solid particles, pass residual therethrough. sheath surrounds to form an initial particle retention phase, maintain its desired shape, and function as base for accumulating retained solids.