Boring or penetrating the earth – Boring a submerged formation – Boring from floating support with submerged independent...
Reexamination Certificate
2005-07-05
2005-07-05
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Boring a submerged formation
Boring from floating support with submerged independent...
C175S195000
Reexamination Certificate
active
06913092
ABSTRACT:
A floating rig or structure for drilling in the floor of an ocean using a rotatable tubular includes a seal housing having a rotatable seal connected above a portion of a marine riser fixed to the floor of the ocean. The seal rotating with the rotating tubular allows the riser and seal housing to maintain a predetermined pressure in the system that is desirable in underbalanced drilling, gas-liquid mud systems and pressurized mud handling systems. The seal is contemplated to be either an active seal or a passive seal. A flexible conduit or hose is used to compensate for relative movement of the seal housing and the floating structure because the floating structure moves independent of the seal housing. A method for use of the system is also disclosed.
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Bourgoyne Darryl A.
Hannegan Don M.
Akin Gump Strauss Hauer & Feld & LLP
Dang Hoang
Weatherford / Lamb, Inc.
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