Whipstock engaging and releasing device

Claim 2

A LOCKING DEVICE FOR RELEASABLY INTERCONNECTING A PAIR OF INNER AND OUTER CONCENTRIC MEMBERS, THE OUTER MEMBER INCLUDING AN ANNULAR CONNECTING PORTION HAVING DOG-RECEIVING MEANS THEREON, SAID DEVICE COMPRISING A CYLINDRICAL BODY COUPLED IN COAXIAL RELATION TO THE INNER CONCENTRIC MEMBER, THE INNER CONCENTRIC MEMBER AND SAID DEVICE HAVING FLUID CONDUCTING PASSAGES THEREIN FOR CONDUCTING FLUID UNDER PRESSURE, AN ANNULAR LOCKING ASSEMBLY CARRIED IN SLIDABLE RELATION ON SAID BODY, WITH LIMITING MEANS ON THE BODY LIMITING SLIDABLE MOVEMENT OF THE ASSEMBLY BETWEEN UPPER AND LOWER LIMITS OF TRAVEL, SAID LOCKING ASSEMBLY COMPRISING LOCKING DOGS DISPOSED IN OUTER SPACED RELATION TO THE BODY, A CAM MEMBER SLIDABLY MOUNTED ON SAID CYLINDRICAL BODY BELOW SAID LOCKING DOGS BEING NORMALLY URGED IN A DIRECTION FORCING SAID DOGS RADIALLY AND OUTWARDLY INTO ENGAGEMENT WITH THE DOG-RECEIVING MEANS, A FIRST FLUID CHAMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT ONE END OF SAID LOCKING ASSEMBLY ADJACENT SAID DOGS, AND A SECOND EXPANSIBLE FLUID CHAMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT THE OPPOSITE END OF SAID LOCKING ASSEMBLY WITH THE WALL OF SAID SECOND CHAMBER BEING CONNECTED TO SAID CAM MEMBER, PISTON MEANS MOVABLE THROUGH SAID FLUID CHAMBERS AND INCLUDING MEANS NORMALLY URGING SAID PISTON MEANS TOWARD THE FIRST FLUID CHAMBER, SAID PISTON MEANS CLOSING SAID FIRST FLUID PORT ONLY WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL, AND SAID CAM MEMBER BEING MOVABLE DONWARDLY AWAY FROM ENGAGEMENT WITH SAID DOGS UNDER APPLICATION OF FLUID PRESSURE INTO SAID SECOND FLUID CHAMBER WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL THEREBY TO RELEASE SAID DOGS FROM ENGAGEMENT WITH SAID DOG-RECEIVING MEANS

Claim 3

A LOCKING DEVICE FOR RELEASABLY INTERCONNECTING A DRILL STRING AND WHIPSTOCK, THE WHIPSTOCK INCLUDING AN ANNULAR CONNECTING PORTION HAVING DOG-RECEIVING MEANS THEREON, SAID DEVICE COMPRISING A CYLINDRICAL BODY COUPLED TO THE DRILL STRING, AND THE DRILL STRING AND SAID DEVICE HAVING FLUID CONDUCTING PASSAGES THEREON FOR CONDUCTING FLUID UNDER PRESSURE, AN ANNULAR LOCKING ASSEMBLY CARRIED IN SLIDABLE RELATION ON SAID BODY WIHT LIMITING MEANS ON THE BODY LIMITING SLIDABLE MOVEMENT OF THE ASSEMBLY BETWEEN UPPER AND LOWER LIMITS OF TRAVEL, SAID LOCKING ASSEMBLY COMPRISING RADIALLY INWARDLY BIASED DOGS IN OUTER SPACED RELATION TO THE BODY, A SPRING-BIASED CAM MEMBER SLIDABLY MOUNTED ON SAID CYLINDRICAL BODY BELOW SAID DOGS BEING NORMALLY URGED IN A DIRECTION FORCING SAID DOGS RADIALLY AND OUTWARDLY INTO ENGAGEMENT WITH THE DOG-RECEIVING MEANS, A FIRST FLUID CHAMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT ONE END OF SAID LOCKING ASSEMBLY ADJACENT SAID DOGS, AND A SECOND EXPANSIBLE FLUID CAHMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT THE OPPOSITE END OF SAID LOCKING ASSEMBLY WITH THE WALL OF SAID SECOND CHAMBER BEING CONNECTED TO SAID CAM MEMBER, PISTON MEANS MOABLE THROUGH SAID FLUID CAHMBERS AND INCLUDING MEANS NORMALLY URGING SAID PISTON MEANS TOWARD THE FIRST FLUID CHAMBER, SAID PISTON MEANS CLOSING SAID FIRST FLUID PORT ONLY WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL, AND SAID CAM MEMBER BEING MOVABLE DOWNWARDLY AWAY FROM ENGAGEMENT WITH SAID DOGS UNDER APPLICATION OF FLUID PRESSURE TO SAID SECOND FLUID CHAMBER WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL THEREBY TO RELEASE SAID DOGS FROM ENGAGEMENT WITH SAID DOG-RECEIVING MEANS AND PROVIDE FOR RELATIVE MOVEMENT BETWEEN THE DRILL STRING AND WHIPSTOCK.

Claim 4

A LOCKING DEVICE FOR RELEASABLY INTERCONNECTING A DRILL STRING AND WHIPSTOCK, THE WHIPSTOCK INCLUDING AN ANNULAR CONNECTING PORTION HAVING DOG-RECEIVING MEANS THEREON, SAID DEVICE COMPRISING A CYLINDRICAL BODY COUPLED TO THE DRILL STRING, AND THE DRILL STRING AND SAID DEVICE HAVING FLUID CONDUCTING PASSAGES THEREON FOR CONDUCTING FLUID UNDER PRESSURE, AN ANNULAR LOCKING ASSEMBLY CARRIED IN SLIDABLE RELATION ON SAID BODY WIHT LIMITING MEANS ON THE BODY LIMITING SLIDABLE MOVEMENT OF THE ASSEMBLY BETWEEN UPPER AND LOWER LIMITS OF TRAVEL, SAID LOCKING ASSEMBLY COMPRISING RADIALLY INWARDLY BIASED DOGS IN OUTER SPACED RELATION TO THE BODY, A SPRING-BIASED CAM MEMBER SLIDABLY MOUNTED ON SAID CYLINDRICAL BODY BELOW SAID DOGS BEING NORMALLY URGED IN A DIRECTION FORCING SAID DOGS RADIALLY AND OUTWARDLY INTO ENGAGEMENT WITH THE DOG-RECEIVING MEANS, A FIRST FLUID CHAMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT ONE END OF SAID LOCKING ASSEMBLY ADJACENT SAID DOGS, AND A SECOND EXPANSIBLE FLUID CAHMBER AND PORT FORMED BETWEEN SAID LOCKING ASSEMBLY AND SAID BODY IN COMMUNICATION WITH THE FLUID PASSAGE AT THE OPPOSITE END OF SAID LOCKING ASSEMBLY WITH THE WALL OF SAID SECOND CHAMBER BEING CONNECTED TO SAID CAM MEMBER, PISTON MEANS MOABLE THROUGH SAID FLUID CAHMBERS AND INCLUDING MEANS NORMALLY URGING SAID PISTON MEANS TOWARD THE FIRST FLUID CHAMBER, SAID PISTON MEANS CLOSING SAID FIRST FLUID PORT ONLY WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL, AND SAID CAM MEMBER BEING MOVABLE DOWNWARDLY AWAY FROM ENGAGEMENT WITH SAID DOGS UNDER APPLICATION OF FLUID PRESSURE TO SAID SECOND FLUID CHAMBER WHEN THE ASSEMBLY IS AT ITS UPPER LIMIT OF TRAVEL THEREBY TO RELEASE SAID DOGS FROM ENGAGEMENT WITH SAID DOG-RECEIVING MEANS AND PROVIDE FOR RELATIVE MOVEMENT BETWEEN THE DRILL STRING AND WHIPSTOCK.