Well bore apparatus

Claim 1

AN APPARATUS FOR FROCING A BIT AGAINST THE BOTTOM OF A BOREHOLE COMPRISING: AN UPPER HOLLOW SHAFT SECTION; A LOWER HOLLOW SHAFT SECTION; A TELESCOPING JOINT SECTION CONNECTING SAID UPPER SHAFT SECTION AND SAID LOWER SHAFT SECTION IN A LONGITUDINALLY SLIDABLE AND NON-ROTATABLE RELATIONSHIP; A HOUSING MEMBER ROTATABLY MOUNTED AROUND SAID UPPER SHAFT SECTION AND EXTENDING AROUND SAID LOWER SHAFT SECTION IN A LONGITUDINALLY SLIDABLE AND ROTATABLE RELATIONSHIP THEREWITH; PUSHDOWN MEANS POSITIONED BETWEEN SAID LOWER SHAFT SECTION AND SAID HOUSING OPERABLE TO EXERT A FORCE ON SAID LOWER SHAFT SECTION LONGITUDINALLY THEREOF IN THE DIRECTION OF SAID BIT AND TO EXERT THE REACTION THRUST OF SUCH FORCE ON SAID HOUSING MEMBER; MEANS TO TRANSFER THE FORCE ON SAID LOWER SHAFT SECTION TO SAID BIT; ANCHOR MEANS ATTACHED TO SAID OUTER HOUSING AND OF A CHARACTER TO TRANSFER THE REACTION THRUST TO THE BOREHOLE WALL.