Wellhead System Having a Tubular Hanger Securable to Wellhead and Method of Operation

Abstract

A tubular hanger and tubular hanger seal are installed in a wellhead with a setting tool. The tubular hanger has a locking ring that is driven outward into engagement with a profile in the wellhead. The setting tool rotates a moveable member of the tubular hanger relative to the tubular hanger body so as to drive the moveable member to expand the locking ring outward to engage the profile in the wellhead. The moveable member may be wedged between the locking ring and the tubular hanger body. The setting tool enables the moveable member and the tubular hanger body to be rotated independently. The annulus between the tubular hanger and the wellhead may be sealed by a seal that has a plurality of sealing elements that are coupled together by a series of catches.

1 .- 13 . (canceled) 
     
     
         14 . A setting tool for installing a wellhead component in a wellhead, comprising:
 a first rotatable member coupleable to a prime mover for rotation;   a second rotatable member;   a third rotatable member; and   a selector assembly adapted to selectively couple the first rotatable member to the second rotatable member and the third rotatable member, wherein in a first state of the selector assembly, when the first rotatable member is rotated in a first direction, the selector assembly couples the first rotatable member to the second rotatable and de-couples the first rotatable member from the third rotatable member, and when the first rotatable member is rotated in a second direction opposite the first direction, the selector assembly couples the first rotatable member to the third rotatable member and de-couples the first rotatable member from the second rotatable member.   
     
     
         15 . The setting tool as recited in  claim 14 , wherein in a second state of the selector assembly, when the first rotatable member is rotated in the second direction, the selector assembly couples the first rotatable member to the second rotatable and de-couples the first rotatable member from the third rotatable member, and when the first rotatable member is rotated in the first direction, the selector assembly couples the first rotatable member to the third rotatable member and de-couples the first rotatable member from the second rotatable member. 
     
     
         16 . The setting tool as recited in  claim 15 , wherein the second rotatable member is adapted to be threaded to the wellhead component and the third rotatable member is adapted to rotate a wellhead component member relative to the wellhead component to perform an action, the selector assembly being set in the first state to enable the third rotatable member to rotate the wellhead component member in the second direction relative to the wellhead component to perform the action and to enable the second rotatable member to be rotated in the first direction relative to the wellhead component to unthread the second rotatable member from the wellhead component. 
     
     
         17 . The setting tool as recited in  claim 16 , wherein the selector assembly is set in the first state to enable the second rotatable member to rotate in the second direction relative to the wellhead component to thread the second rotatable member to the wellhead component and to enable the third rotatable member to rotate the wellhead component member in the second direction relative to the wellhead component to reverse the action. 
     
     
         18 . The setting tool as recited in  claim 15 , wherein the selector assembly comprises:
 a first engagement member adapted to selectively couple the first rotatable member to the second rotatable member; and   a second engagement member adapted to selectively couple the first rotatable member to the third rotatable member, wherein the selector assembly ratchets the first engagement member when the selector assembly decouples the first rotatable member from the second rotatable member and ratchets the second engagement member when the selector assembly decouples the first rotatable member from the third rotatable member.   
     
     
         19 . A seal for sealing the annulus between a first wellhead component and a second wellhead component, comprising:
 a first seal member having a male portion with a first catch; and.   a second seal member having a female portion with a second catch, the first seal member being disposed within the second seal member, wherein the first catch engages the second catch to secure the first seal member and second seal member together.   
     
     
         20 . The seal as recited in  claim 19 , wherein at least one of the first and second seal members comprises an elastomeric material. 
     
     
         21 . A method of securing a first wellhead component to a second wellhead component using a setting tool having a first rotatable member, a second rotatable member, and a third rotatable, comprising:
 establishing the setting tool in a state of operation wherein rotation of the first rotatable member is coupled to the second rotatable member only when the first rotatable member is rotated in a first direction and rotation of the first rotatable member is coupled to the third rotatable member only when the first rotatable member is rotated in a second direction opposite the first direction;   reducing the displacement between the first wellhead component and the second wellhead component until an outwardly-biased member of the first wellhead component engages a first profile in the second wellhead component;   rotating the first rotatable member in a first direction to rotate the second rotatable member in the first direction to drive an inwardly-biased member of the first wellhead component outward to engage the second wellhead component; and   rotating the first rotatable member in the second direction to rotate the third rotatable member in the second direction to unthread the third rotatable member from the first wellhead component.