A downhole apparatus comprising a tubular body; first and second ports in a wall of the body, and a fluid pressure-responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port is open and the second port is closed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port is open and the second port is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port is open and the first port is closed.
申请公布号
AU2013229230(A1)
申请公布日期
2014.10.23
申请号
AU20130229230
申请日期
2013.03.07
申请人
DARCY TECHNOLOGIES LIMITED
发明人
BRUCE, STEPHEN EDMUND;KENT, STEPHEN;MCCANN, DOMINIC PATRICK JOSEPH;NOBLETT, DAVID ALLAN;GRANT, DAVID;SMITH, EWAN COLIN