Removal section for well casing

Claim 1

A METHOD OF COMPLETING A WELL FOR PRODUCTING FROM A LONG INTERVAL COMPRISING THE STEPS OF FORMING A CASING STRING INCLUDING AT LEAST A PORTION THEREOF OF SMALLER OUTSIDE DIAMETER THAN THE INSIDE DIAMETER OF THE REMAINDER OF THE CASING STRING LOCATED ABOVE SAID PORTION, FORMING A PROTECTIVE SHEATH AROUND SAID PORTION, TO PROVIDE AN ANNULAR CHAMBER BETWEEN SAID PORTION AND SAID PROTECTIVE SHEATH, AT LEAST PARTIALLY FILLING SAID ANGULAR CHAMBER WITH LIQUID, SEALING SAID PROTECTIVE SHEATH TO THE CASING STRING ABOVE AND BELOW SAID PORTION TO FORM A CLOSED ANNULAR CHAMBER BETWEEN SAID PORTION AND SAID SHEATH POSITIONING SAID CASING STRING IN A WELL, FLOWING CEMENT INTO THE ANNULAR SPACE BETWEEN SAID CASING STRING AND SAID WELL, ALLOWING SAID CEMENT TO SET, AND REMOVING SAID PORTION OF SAID CASING STRING FROM SAID WELL.