发明名称 |
Managed pressure drilling system having well control mode |
摘要 |
MANAGED PRESSURE DRIL L ING SYST EM HAVING VEL L CONTROL MODE A method of managing drilling pressures, comprising measuring a flow rate of a drilling fluid (60d) injected into a tubular string extending into a subsea wellbore (100) in a formation; measuring a flow rate of returns from a drill bit disposed on a bottom of the tubular string; comparing the returns flow rate to the drilling fluid (60d) flow rate to detect a kick; exerting backpressure on the returns using a first variable choke valve; and in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) (lp) against the tubular string; and diverting the flow of returns from the PCA (lp), through a choke line having a second variable choke valve, and through the first variable choke valve. |
申请公布号 |
AU2016202031(A1) |
申请公布日期 |
2016.04.21 |
申请号 |
AU20160202031 |
申请日期 |
2016.04.01 |
申请人 |
WEATHERFORD TECHNOLOGY HOLDINGS LLC |
发明人 |
BOUTALBI, SAID;GRAYSON, MICHAEL BRIAN |
分类号 |
E21B21/08;E21B21/00 |
主分类号 |
E21B21/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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