Patent ID: 6199635
Filing Date: 2001-03-13
Classification: E21B

Abstract:
A shifting apparatus for use with a tubular string set in a well for selective unlocking and orientation of sections of said tubular string below said shifting apparatus while said sections above said shifting apparatus remain substantially unchanged in orientation in said well comprising,a lower tubular wall means connected to said tubular string above said shifting apparatus,an upper tubular wall means selectively connected to said lower tubular wall means for controlled movement between said lower tubular wall means and said upper tubular wall means, and connected to said tubular string below said shifting apparatus, andan internal tool means located inside said upper and lower tubular wall means for releasablely and selectively locking into said upper and lower tubular wall means for holding said upper and lower tubular wall means engaged until orientation of said tubular string below said shifting apparatus is desired and for releasablely and selectively unlocking said upper tubular wall means from said lower tubular walls means for allowing said upper tubular wall means and said tubular string below said shifting apparatus to be rotationally oriented by said internal tool means with said lower tubular wall means and said tubular string above said shifting apparatus remaining substantially unchanged in orientation in said well.