A METHOD OF SUSPENDING, COMPLETING AND WORKING OVER A WELL

摘要

In the various methods of the present invention, reliance is placed on a fir st and second barrier (26) and (30) respectively positioned in a well (10) to provide well control during well suspension, completion and/or workover operations. Each of the barriers is below the depth of the lowermost end of a completion string when that string is installed in the well (10). By not placing either barrier higher up in the well-bore, both of the barriers can remain in place during suspension and completion and workover operations, th us obviating the need to use a BOP stack to supplement well control. This resul ts in a considerable saving in drill rig time and thus significantly reduces th e cost of constructing a well.