Liner cementing apparatus

Claim 1

A LINER SETTING AND CEMENTING TOOL FOR WELLS, COMPRISING, A TUBULAR EXTENSION FOR ANCHORING THE LINER, MEANS CARRIED BY SAID EXTENSION FORO ANCHORING THE LINER TO A SURROUNDING WELL CASING, A TUBULAR MANDREL HAVING RADIAL PORTS THROUGH THE WALL THEREOF CONNECTIBLE TO AN OPERATING PIPE STRING AND INSERTABLE IN SAID EXTENSION, CONNECTOR MEANS RELEASABLY SECURING SAID MANDREL TO SAID EXTENSION AND OPERABLE IN RESPONSE TO ROTATION OF THE MANDREL, RELATIVE TO SAID EXTENSION TO RELEASE THE MANDREL, ANNULAR PACKER MEANS CARRIED ON SID EXTENSION ABOUT SAID MANDREL, SAID PACKER MEANS BEING EXPANSIBLE BY AXIAL COMPRESSION TRANSMITTED FROM SAID OPERATING STRING TO SEAL OFF THE ANNULAR SPACE BETWEEN THE LINER EXTENSION AND SAID CASING, CROSS-OVER MEANS ROTATABLY POSITIONED ABOUT THE MANDREL HAVING RADIAL PASSAGES COMMUNICATING THE INTERIOR OF THE MANDREL THROUGH SAID RADIAL PORTS TO THE EXTERIOR OF SAID EXTENSION BELOW SAID PACKER MEANS AND HAVING BY-PASS PASSAGES EXTENDING AROUND SAID RADIAL PASSAGES COMMUNICATING THE EXTERIOR OF THE EXTENSION ABOVE SAID PACKER MEANS WITH THE ANNULAR SPACE BETWEEN THE MANDREL AND SAID EXTENSION, SLEEVE VALVE MEANS SLIDABLY DISPOSED IN THE BORE OF SAID MANDREL FOR LONGITUDINAL MOVEMENT THEREIN BETWEEN A FIRST POSITION CLOSING OFF SAID RADIAL PORTS AND A SECOND POSITION OPENING SAID RADIAL PORTS, PLUG MEANS RECEIVABLE IN THE BORE OF SAID SLEEVE