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
WO2011091140(A2)
申请公布日期
2011.07.28
申请号
WO2011US21871
申请日期
2011.01.20
申请人
SMITH INTERNATIONAL, INC.;GILL, WILLIAM, C.;HARRIS, MICHAEL, J.;ABRAHAM, AJU;COSTO, ROBERT, JAMES
发明人
GILL, WILLIAM, C.;HARRIS, MICHAEL, J.;ABRAHAM, AJU;COSTO, ROBERT, JAMES