TENSION TUBING HANGER AND METHOD OF APPLYING TENSION TO PRODUCTION TUBING.

摘要

A tubing hanger assembly (25) includes a tubular outer tubing hanger member (27) adapted to land in a bore of a wellhead (13). A tubular inner tubing hanger member (37) is adapted to be secured to a string of production tubing (39) and has an engaged position in a bore of the outer tubing hanger member. A retaining mechanism (35, 47, 73, 83) selectively allows the inner tubing hanger member to be lowered relative to the outer tubing hanger member, then selectively allowing the inner tubing hanger member to be returned back to the engaged position, to create tension in the string of production tubing. The retaining mechanism operates in response to rotational movement of the inner tubing hanger member while the outer tubing hanger member remains stationary with the wellhead.