DOWNHOLE DUMP VALVE

专利名称：DOWNHOLE DUMP VALVE

发明人：BURRIS, MARK, A.,HIBLER, DONALD R. JR.申请号：EP99919829申请日：19990414公开号：EP1086293A4公开日：20041124

摘要：An improved dump valve assembly (22) is provided for use as a part of anelongated, sectionalized, tubular downhole pipe string (18). The assembly (22) includes atubular pipe section (24) having endmost threading (34, 38) and a rupture disc fitting (26);the fitting (26) includes a metallic, preferably concavo-convex disc (50) with preformedlines of weakness (52, 54) on one face thereof. The section (24) is interconnected

between a pair of lower pipe sections (20a, 20b). In operation when it is desired to elevatethe string (18) from the well, the fluid within the string (18) is pressurized sufficiently torupture the disc (50), thereby allowing fluid within the string (18) to drain. The string (18)and other well components can then be removed from the well without contaminationowing to spillage from the tubular string (18).

申请人：FIKE CORPORATION

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