Single trip, tension set, metal-to-metal sealing, internal lockdown tubing hanger

A method for applying tension to a wellbore tubing, the method comprising:

• (a) releasably engaging an inner tubing hanger to an outer tubing hanger, attaching an upper end of a length of tubing to the inner tubing hanger, and attaching a running tool to the inner tubing hanger;
• (b) 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) energizing a seal between the outer tubing hanger and the wellhead member;
• (e) latching the lower end of the tubing into a retainer in the wellbore;
• (f) applying tension to the tubing by pulling upward on the running tool;
• (g) collapsing an expandable ring between the inner and outer tubing hangers in response to energizing the seal,
• (h) latching the inner tubing hanger into the outer tubing hanger with the expandable ring to hold the tubing in tension as the inner tubing hanger moves into engagement with the outer tubing hanger and
• (i) disconnecting the running tool from the inner tubing hanger after energizing the seal.

An apparatus for applying tension to tubing in a wellbore, the apparatus comprising:

• a tubing hanger outer portion;
• a tubing hanger inner portion that is adapted to be secured to a running tool and to the tubing;
• a latch mechanism between the inner and outer portions that allows the inner portion to be lowered relative to the outer portion after the outer portion lands in a wellhead member and the inner portion is lifted back into engagement with the outer portion;
• a seal mounted to the tubing hanger outer portion and movable by the running tool from an unenergized position when the tubing hanger outer portion lands in the wellhead member to an energized position for sealing between the wellhead member and the tubing hanger outer portion;
• and
• wherein movement of the seal to the energized position actuates the latch mechanism to latch the tubing hanger inner portion to the tubing hanger outer portion to prevent further downward movement of the tubing hanger inner portion relative to the tubing hanger outer portion, thereby maintaining tension in the tubing.