A pressurizing device includes a main housing having a central bore therethrough and a ball drop module removably disposed within the main housing, the ball drop module including a ball seat hingedly attached within the ball drop module and configured to receive a dropped ball, wherein the ball seat is configured to rotate about a hinge from a closed position to an open position when a pressure above the ball seat exceeds a preset limit.
申请公布号
AU2011207216(B2)
申请公布日期
2016.09.15
申请号
AU20110207216
申请日期
2011.01.20
申请人
SMITH INTERNATIONAL, INC.
发明人
GILL, WILLIAM C.;HARRIS, MICHAEL J.;ABRAHAM, AJU;COSTO, ROBERT JAMES