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2. 发明申请

WO2017037422A1 METHOD OF OPERATING A DRILLING SYSTEM 审中-公开
标题翻译：钻井系统的操作方法
公开(公告)号：WO2017037422A1
公开(公告)日：2017-03-09
申请号：PCT/GB2016/052614
申请日：2016-08-23
申请人： MANAGED PRESSURE OPERATIONS PTE. LTD. , LAWSON, Alison
发明人： PICCOLO, Brian , LEUCHTENBERG, Christian , PINKSTONE, Henry
IPC分类号： E21B33/035 , E21B44/00 , E21B21/08 , E21B21/00
CPC分类号： E21B33/0355 , E21B21/001 , E21B21/08 , E21B44/00 , E21B2021/006
摘要： A method of operating a drilling system, the drilling system comprising: a drill string which extends into a wellbore, a driver operable to rotate the drilling string, a pump operable to pump drilling fluid down the drill string, a well head mounted at the top of the wellbore, a riser extending up from the wellhead around the drill string, a blowout preventer which is mounted on the well head and which is operable to close around the drill string to substantially prevent flow of fluid from the annular space around the drill string in the wellbore into the annular space around the drill string in the riser (the riser annulus), the BOP having a sealing element which engages with the drill string when the BOP is operated to close around the drill string, a riser closure device which is mounted in the riser and which is operable to close around the drill string to substantially prevent flow of fluid along the riser annulus, a return conduit, a flow outlet which is provided in the riser below the riser closure device and which connects the riser annulus to the return conduit, wherein the method comprises the steps of, after determining that there is or may be a need to close the BOP, implementing a control procedure comprising the following steps: a) operating the driver to stop rotation of the drill siring, b) closing the riser closure device (if not already closed), c) operating the pump to stop the pumping of mud into the drill string, d) closing the blowout preventer, characterised in that the method further includes the step of e) increasing the wellbore pressure by controlling the rate of flow of fluid along the return conduit.
摘要翻译：一种操作钻井系统的方法，所述钻井系统包括：钻柱，其延伸到井筒中，可操作以旋转钻柱的驱动器，可操作以将钻井液体沿钻柱下方泵送的泵，安装在顶部的井头的井筒，从井口围绕钻柱延伸的提升管，防喷器，其安装在井口上，其可操作以围绕钻柱围绕，以基本上防止流体从钻柱周围的环形空间流出在井眼进入提升管（提升管环）中的钻柱周围的环形空间中时，BOP具有当BOP操作以围绕钻柱关闭时与钻柱接合的密封元件，提升管闭合装置安装在提升管中并且其可操作以围绕钻柱闭合以基本上防止流体沿着提升管环流动，返回管道，设置在提升管中的流出口所述提升管闭合装置将所述提升管闭合装置连接到所述返回导管，其中所述方法包括以下步骤：在确定存在或可能需要关闭所述BOP之后，实施包括以下步骤的控制程序：a）操作驱动器以停止钻头的旋转，b）关闭提升管闭合装置（如果尚未闭合），c）操作泵以停止将泥浆泵送到钻柱中，d）关闭防喷器，其特征在于该方法还包括以下步骤：e）通过控制流体沿着返回导管的流速来增加井筒压力。

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