| 摘要 |
A method of operating a system for handling an influx of gas into a marine riser (5) during the drilling of a well bore, the method including the steps of operating a first riser closure apparatus (21) to close the riser (5) at a first point above a flow spool (22) provided in the riser (5), there being a riser gas handling line (47, 48) extending from the riser (5) at the flow spool (22) to a riser gas handling manifold (49), operating a second riser closure apparatus (3) to close the riser (5) at a second point below the flow spool (22), pumping fluid into an inlet line (41) which extends into the riser (5) at a point above the second point but below the flow spool (22), wherein the method further comprises operating a choke (53, 54) provided in the riser gas handling manifold (49) to maintain the pressure in the inlet line (41) or the riser (5) at a substantially constant pressure. |
