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CN104246114A 处理隔水管中的气体侵入的方法 有权

处理隔水管中的气体侵入的方法
摘要：
一种操作方法，该方法操作在对井身进行钻探期间处理海洋隔水管(5)中的气体侵入的系统，所述方法包括以下步骤：操作第一隔水管关闭设备(21)以在设置在所述隔水管(5)中的流量滑阀(22)的上方的第一点处关闭所述隔水管(5)，存在有在所述流量滑阀(22)处从所述隔水管(5)延伸到隔水管气体处理歧管(49)的隔水管气体处理管线(47、48)；操作第二隔水管关闭设备(3)以在所述流量滑阀(22)的下方的第二点处关闭所述隔水管(5)；将流体泵送到入口管线(41)中，所述入口管线(41)在高于所述第二点但低于所述流量滑阀(22)的点处延伸到所述隔水管(5)中，其中所述方法还包括；操作设置在所述隔水管气体处理歧管(49)中的扼流圈(53、54)，以维持所述入口管线(41)或所述隔水管(5)中的压力处于基本上恒定的压力。
摘要（英）：

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.

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