Patent ID: 6039118
Filing Date: 2000-03-21
Classification: E21B

Abstract:
A wellbore motion control apparatus for controlling the motion of a tubular wellbore string in a wellbore extending from a surface down into the earth, the motion control apparatus comprisinga housing with a top end, a bottom end, and a hollow interior having an interior volume with fluid therein,at least one fluid passage apparatus having a top end and a bottom end and disposable in the hollow interior of the housing, the at least one fluid passage apparatus having a fluid flow channel extending therethrough from the top end to the bottom end, andthe at least one fluid passage apparatus securable to a member of the tubular wellbore string while the at least one fluid passage apparatus is positioned within the hollow interior of the housing so that fluid in the hollow interior of the housing is flowable through the fluid flow channel from one end of the fluid passage apparatus to the other end of the fluid passage apparatus permitting movement of the fluid passage apparatus within the housing controlling movement of the member of the tubular wellbore string and thereby controlling movement of the tubular string in the wellbore.