发明名称 MULTI-ACTING CIRCULATION VALVE
摘要 A fracturing and gravel packing tool has features that prevent well swabbing when the tool is picked up with respect to a set isolation packer. An upper or multi-acting circulation valve allows switching between the squeeze and circulation positions without risk of closing the low bottom hole pressure ball valve. The multi-acting circulation valve can prevent fluid loss to the formation when being set down with the crossover tool supported or on the reciprocating set down device and the multi-acting circulation valve is closed without risk of closing the wash pipe valve.
申请公布号 WO2011028563(A2) 申请公布日期 2011.03.10
申请号 WO2010US46587 申请日期 2010.08.25
申请人 BAKER HUGHES INCORPORATED;CLEM, NICHOLAS, J.;CORONADO, MARTIN, P.;KITZMAN, JEFFERY, D.;EDWARDS, JEFFRY, S. 发明人 CLEM, NICHOLAS, J.;CORONADO, MARTIN, P.;KITZMAN, JEFFERY, D.;EDWARDS, JEFFRY, S.
分类号 E21B34/10;E21B43/04;F16K1/16;F16K5/06 主分类号 E21B34/10
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