Well drilling method

Claim 1

IN A METHOD FOR COMPLETING A WELL DRILLED INTO A FORMATION UNDERLYING A BODY OF WATER FROM A VESSEL FLOATING ON SAID BODY OF WATER WHEREIN AN APERTURED LANDING BASE IS POSITIONED OVER SAID WELL, THE STEPS COMPRISING: CONNECTING AT SAID VESSEL, A SURFACE PIPE, CASING LANDING MANDREL, BLOWOUT PREVENTER, DRILLING AND PRODUCTION MANDREL, AND CASING RISER, SAID CONNECTED ASSEMBLAGE HAVING A CENTRAL BORE EXTENDING THERETHROUGH LOWERING SAID CONNECTED ASSEMBLAGE FROM SAID VESSEL TO SAID FORMATION ON SAID CASING RISER OVER A DRILL STRING EXTENDING INTO SAID WELL WHEREBY SAID SURFACE PIPE EXTENDS INTO SAID WELL AND THE REMAINDER OF SAID ASSEMBLAGE RESTS ON SAID LANDING BASE, CEMENTING SAID SURFACE PIPE INTO SAID FORMATION, LOWERING AND GUIDING A WATER SHUT-OFF CASING THROUGH SAID CENTRAL BORE OF SAID ASSEMBLAGE INTO SAID SURFACE PIPE WHEREBY SAID CASING IS LANDED ON SAID LANDING MANDREL, ATTACHING A BYPASS PIPE TO A SECTION OF SAID DRILL STRING WHEREBY A BYPASS ANNULS IS PROVIDED BETWEEN SAID DRILL STRING AND SAID ASSEMBLAGE ABOVE SAID WATER CASING, CEMENTING SAID WATER CASING INTO SAID SURFACE PIPE AND SAID FORMATION, CIRCULATING SAID BYPASS ANNULUS CLEAN, AND GUIDING A TUBING STRING INTO SAID WATER CASING AND HANGING SAID TUBING STRING IN SAID DRILLING AND PRODUCTION MANDREL, WHEREBY SAID TUBING COMMUNICATES WITH AN OUTLET IN SAID DRILLING AND PRODUCTION HEAD.