ONE TRIP TUBULAR EXPANSION AND RECESS FORMATION APPARATUS AND METHOD

摘要

A ONE TRIP TOP TO BOTTOM EXPANSION TO FORM A LOWER END RECESS ON A TUBULAR IS DESCRIBED USING TWO SWAGES (26,38) OF DIFFERENT DIMENSIONS. THE SMALLER SWAGE (26) IS RUN DOWN HOLE WITH THE LARGER SWAGE (38) BEHIND IT IN A LOCKED COLLAPSED POSITION. WHEN THE PROPER DEPTH IS REACHED THE LEADING SWAGE (26) HITS A NO GO. A PICKUP FORCE WITH DOGS (20) ENGAGED IN A GROOVE (24) RELEASES THE LOCK ON THE LARGER SWAGE (38) AT WHICH POINT APPLIED PRESSURE SETS AN ANCHOR, EXTENDS THE LARGER SWAGE TO TAKE OVER THE EXPANSION FOR THE RECESS AT THE LOWER END OF THE TUBULAR (10). AN EMERGENCY RELEASE IS PROVIDED TO PULL OUT OF THE HOLE IF THE SWAGE CANNOT COMPLETE THE TASK. FIG 1.