Boring or penetrating the earth – Boring a submerged formation – Boring from floating support with submerged independent...
Patent
1991-10-18
1994-05-31
Dang, Hoang C.
Boring or penetrating the earth
Boring a submerged formation
Boring from floating support with submerged independent...
166339, 166342, 166349, 166358, 166365, E21B 7128
Patent
active
053160894
ABSTRACT:
A method of drilling a subsea well involves partial drilling of several wells within a cluster. A base such as a template will have a receptacle. A gimbal mounts to a latching mechanism which in turn releasably latches an outer wellhead housing. The latching mechanism has an upward facing guide funnel. After setting conductor pipe, the well is drilled to a selected depth, an inner wellhead housing and a first string of casing are lowered through the funnel. The running tool for the inner wellhead housing has a funnel retriever which latches to the funnel. After the casing has been cemented, upward movement of the running tool will pull the funnel, latching mechanism and gimbal to the surface.
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ABB Vetco Gray Inc.
Bradley James E.
Dang Hoang C.
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