E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/12 (2006.01) E21B 7/20 (2006.01) E21B 17/07 (2006.01) E21B 33/04 (2006.01) E21B 41/00 (2006.01)
Patent
CA 2452903
The present invention generally relates to methods for drilling a subsea wellbore and landing a casing mandrel in a subsea wellhead. In one aspect, a method of drilling a subsea wellbore with casing is provided. The method includes placing a string of casing with a drill bit at the lower end thereof in a riser system and urging the string of casing axially downward. The method further includes reducing the axial length of the string of casing to land a wellbore component in a subsea wellhead. In this manner, the wellbore is formed and lined with the string of casing in a single run. In another aspect, a method of forming and fining a subsea wellbore is provided. In yet another aspect, a method of landing a casing mandrel in a casing hanger disposed in a subsea wellhead is provided.
Brunnert David J.
Galloway Gregory G.
Deeth Williams Wall Llp
Weatherford/lamb Inc.
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