A tool for use in cementing comprises a cylindrical body (102) having a wall (103) provided with a hole (104) for the passage of cement. The hole (104) is provided with a tubular member (105) which projects into the cylindrical body and is made from a ductile metal which can be deformed to close the hole (104).
申请公布号
WO9500740(A1)
申请公布日期
1995.01.05
申请号
WO1994EP02066
申请日期
1994.06.23
申请人
WEATHERFORD U.S., INC.;LUCAS, BRIAN, RONALD
发明人
BLIZZARD, WILLIAM, A., JR.;TILTON, FREDERICK, THOMAS
