Patent ID: 8127857
Filing Date: 2012-03-06
Classification: E21B

Abstract:
1. A method for applying tension to a wellbore tubing, the method comprising: (a) releasably engaging an inner tubing hanger to an outer tubing hanger and attaching an upper end of a length of tubing to the inner tubing hanger; (b) releasably connecting a running tool to the inner tubing hanger and lowering the tubing into a wellbore and landing the outer tubing hanger in a wellhead member; (c) disengaging the inner tubing hanger from the outer tubing hanger and lowering the inner tubing hanger below the outer tubing hanger; (d) latching the lower end of the tubing into a retainer in the wellbore; (e) applying tension to the tubing by pulling upward; (f) as the inner tubing hanger moves into engagement with the outer tubing hanger, latching the inner tubing hanger into the outer tubing hanger to hold the tubing in tension; and (g) using the running tool to energize a seal between the outer tubing hanger and the wellhead member.