| 摘要 |
A floating rig or structure (S) for drilling in the floor of an ocean using a rotatable tubular includes a seal housing having a rotatable seal (SJ) connected above a marine riser (R) 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. A flexible conduit (30,32) or hose is used to compensate for the relative movement of the seal housing and the floating structure (S) since the floating structure moves independent of the seal housing. A method for use of the system is also disclosed. |
