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1. 发明授权

US10047578B2 Pressure control in drilling operations with choke position determined by Cv curve 有权
公开(公告)号：US10047578B2
公开(公告)日：2018-08-14
申请号：US14412631
申请日：2012-07-02
申请人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
发明人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
IPC分类号： E21B21/08 , E21B21/10 , E21B34/02 , E21B47/06
摘要： A method of controlling pressure in a wellbore can include determining a desired position for a choke, the determining being based on a Cv curve for the choke, and adjusting the choke to the desired position, thereby producing a desired backpressure. A wellbore drilling system can include a choke which variably restricts flow of fluid from the wellbore, and a control system which compares actual and desired wellbore pressures and, in response to a difference between the actual and desired wellbore pressures, adjusts the choke to a predetermined position which corresponds to a desired Cv of the choke. A method of controlling pressure in a wellbore can include comparing an actual wellbore pressure to a desired wellbore pressure and, in response to a difference between the actual and desired wellbore pressures, adjusting a choke to a predetermined position, the predetermined position corresponding to a desired Cv of the choke.

2. 发明申请

US20140290964A1 PRESSURE CONTROL IN DRILLING OPERATIONS WITH OFFSET APPLIED IN RESPONSE TO PREDETERMINED CONDITIONS 审中-公开
标题翻译：钻孔操作中的压力控制应用于预测条件的偏差
公开(公告)号：US20140290964A1
公开(公告)日：2014-10-02
申请号：US14362565
申请日：2012-07-02
申请人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
发明人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
IPC分类号： E21B34/10
CPC分类号： E21B34/10 , E21B21/08
摘要： A method of controlling pressure in a wellbore can include determining a desired well pressure setpoint, adding an offset to the setpoint in response to an actual well pressure deviating from the setpoint by a predetermined amount, and adjusting a flow control device, thereby influencing the actual well pressure toward the setpoint plus the offset. A well system can include a flow control device which variably restricts flow from a wellbore, and a control system which determines a desired well pressure setpoint, compares the setpoint to an actual well pressure, and adds an offset to the setpoint in response to a predetermined amount of deviation between the setpoint and the actual well pressure, whereby the control system adjusts the flow control device, and thereby influences the actual well pressure toward the setpoint plus the offset.
摘要翻译：控制井眼中的压力的方法可以包括确定期望的井压设定点，响应于偏离设定点预定量的实际井压而将偏移量添加到设定点，以及调节流量控制装置，由此影响实际对设定值的加压偏移很大。井系统可以包括可变地限制来自井筒的流量的流量控制装置，以及确定期望井压力设定点的控制系统，将设定值与实际油井压力进行比较，并且响应于预定的设定值与实际井压之间的偏差量，由此控制系统调节流量控制装置，从而影响到设定点的实际井压加偏移。

3. 发明申请

US20150240579A1 Pressure Control in Drilling Operations with Choke Position Determined by Cv Curve 审中-公开
标题翻译：采用Cv曲线确定扼流位置钻孔作业时的压力控制
公开(公告)号：US20150240579A1
公开(公告)日：2015-08-27
申请号：US14412631
申请日：2012-07-02
申请人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
发明人： James R. Lovorn , Nancy S. Davis , Cody N. Butler
IPC分类号： E21B21/08 , E21B21/10 , E21B47/06 , E21B34/02
CPC分类号： E21B21/08 , E21B21/10 , E21B34/02 , E21B47/06
摘要： A method of controlling pressure in a wellbore can include determining a desired position for a choke, the determining being based on a Cv curve for the choke, and adjusting the choke to the desired position, thereby producing a desired backpressure. A wellbore drilling system can include a choke which variably restricts flow of fluid from the wellbore, and a control system which compares actual and desired wellbore pressures and, in response to a difference between the actual and desired wellbore pressures, adjusts the choke to a predetermined position which corresponds to a desired Cv of the choke. A method of controlling pressure in a wellbore can include comparing an actual wellbore pressure to a desired wellbore pressure and, in response to a difference between the actual and desired wellbore pressures, adjusting a choke to a predetermined position, the predetermined position corresponding to a desired Cv of the choke.
摘要翻译：控制井眼中的压力的方法可以包括确定扼流圈的期望位置，该确定基于扼流圈的Cv曲线，并将扼流圈调节到所需位置，由此产生所需的背压。井眼钻井系统可以包括可变地限制来自井筒的流体流动的扼流圈，以及控制系统，该控制系统比较实际和期望的井眼压力，并且响应于实际井眼压力和期望的井眼压力之间的差异，将扼流圈调节到预定的对应于扼流圈所需Cv的位置。控制井眼中的压力的方法可以包括将实际井眼压力与期望的井眼压力进行比较，并且响应于实际井眼压力和期望井筒压力之间的差异，将扼流圈调节到预定位置，对应于预期位置的预定位置扼流圈的Cv。

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