A check valve is provided having a magnetic plug and a magnetic seat. The magnetic seat and magnetic plug operationally engage so as to have a magnetic resistivity such that there is a first position in which the magnetic plug does not sealingly engage the magnetic seat and a second position where the magnetic plug is sealingly engaged with the magnetic seat.
申请公布号
WO2015038115(A1)
申请公布日期
2015.03.19
申请号
WO2013US59240
申请日期
2013.09.11
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
STAIR, TODD ANTHONY;BUDLER, NICHOLAS FREDERICK;CHERNEY, PATRICK LYLE