Casing hanger with landing shoulder seal insert

Details Casing hanger with landing shoulder seal insert Casing hanger with landing shoulder seal insert

1987-09-11

1989-02-28

Dang, Hoang C.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166 85, 166208, 285143, E21B 33043, E21B 33047

Patent

active

048077054

ABSTRACT:
A subsea wellhead housing for an underwater well has a small, integral landing shoulder in the bore for supporting an intermediate casing string. The small landing shoulder permits passage of a standard 171/2 inch drill bit. Breech block teeth are provided in the wellhead housing bore above the small landing shoulder for attaching a separately installable landing shoulder insert. The breech block teeth also permit passage of a standard 171/2 inch drill bit. An intermediate casing hanger is landed on the small, integral shoulder, and the landing shoulder insert installed in the wellhead housing. The landing shoulder insert has a skirt at its lower end which is received in and sealed against the upper end of the hanger. The upper end of the landing shoulder insert is sealed against the wellhead housing bore. In one embodiment, the hanger for 17 inch casing is fluted on its outer surface to pass through breech block slots in the wellhead housing bore in order to reach its landing shoulder. In another embodiment, the breech block profile is bored out to allow passage therethrough of a 16 inch casing hanger to reach its landing shoulder without rotationally orienting the hanger with respect to the wellhead. In all embodiments, pressure end load from internal wellhead pressure is transferred to the housing by the breech block teeth between the housing and the landing shoulder insert. The small, integral landing shoulder thereby supports only the intermediate casing string weight.

REFERENCES:
patent: 3273915 (1966-09-01), Bishop et al.
patent: 4138144 (1979-02-01), Pierce, Jr.
patent: 4289206 (1981-09-01), Kirkland
patent: 4353420 (1982-10-01), Miller
patent: 4488740 (1984-12-01), Baugh et al.
patent: 4550782 (1985-11-01), Lawson
patent: 4595063 (1986-06-01), Jennings et al.
patent: 4597448 (1986-07-01), Baugh
patent: 4615544 (1986-10-01), Baugh

Affiliated with

Also associated with

Rating

Casing hanger with landing shoulder seal insert does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Casing hanger with landing shoulder seal insert, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Casing hanger with landing shoulder seal insert will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1359115