| 摘要 |
Methods and systems are provided for varying fluid pressure in a circulation system while circulating a kick out of a well bore (30) drilled through a subterranean formation using a drilling rig (25) and a drill string (50). The kick may be automatically circulated out of the well bore and/or a kill fluid may be circulated into the well bore. A controller (100) reduces the circulation rate by automatically controlling the rate of the pump (90) and the position of well bore choke (70). Various sensors interconnected with the controller may be used to maintain circulation system operation. The controller may control various components utilized in the circulation procedure to maintain a substantially constant bottom hole pressure on the formation while circulating the kick out of the well.
|
