Side wall core taking apparatus

Claim 1

A CORE TAKING DEVICE FOR DRILLED WELLS COMPRISING MEANS PROVIDING A TUBULAR BODY ADAPTED FOR CONNECTION IN A DRILL STEM, MEANS PROVIDING A SHEATH ABOUT SAID BODY ROTATABLY MOUNTED TO ROTATE ABOUT THE AXIS OF SAID BODY, AT LEAST ONE CORE TAKER TUBE HOUSED BETWEEN SAID BODY AND SHEATH AND CONNECTED TO SAID BODY FOR VERTICAL SWINGING MOVEMENT OUTWARDLY FROM SAID BODY, EACH OF SAID CORE TUBES WHEN IN EITHER OF ITS EXTREME POSITIONS BEING DISPOSED WITHIN SAID SHEATH, SAID SHEATH HAVING AN OPENING THEREIN FOR REGISTRATION WITH EACH CORE TUBE, EACH CORE TUBE BEING ARRANGED ADJACENT THE ROTATIVE PATH OF TRAVEL OF AN OPENING IN SAID SHEATH, MEANS FOR TURNING SAID SHEATH ABOUT SAID BODY FOR REGISTRATION OF EACH CORE TUBE WITH AN OPENING FORMED IN SAID SHEATH, AND MEANS BIASING EACH CORE TUBE FOR VERTICAL SWINGING MOVEMENT OUTWARDLY FROM SAID BODY, THE INTERIOR OF SAID SHEATH ABUTTING EACH OF THE CORE TUBES IN A RETRACTED POSITION THEREOF FOR RELEASABLY SECURING SAID CORE TUBE AGAINST SUCH SWINGING MOVEMENT, AND SAID BIAS MEANS BEING EFFECTIVE WHEN SAID CORE TUBE AND OPENING REGISTER FOR VERTICALLY SWINGING SAID CORE TUBE OUTWARDLY FROM SAID BODY THROUGH THE ASSOCIATED OPENING IN SAID SHEATH FROM ONE EXTREME POSITION TO THE OTHER.