发明名称 |
MANAGED PRESSURE DRILLING SYSTEM HAVING WELL CONTROL MODE |
摘要 |
A method of drilling a subsea wellbore includes drilling the subsea wellbore and, while drilling the subsea wellbore: measuring a flow rate of the drilling fluid injected into a tubular string; measuring a flow rate of returns; comparing the returns flow rate to the drilling fluid flow rate to detect a kick by a formation being drilled; and exerting backpressure on the returns using a first variable choke valve. The method further includes, in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) against the tubular string; and diverting the flow of returns from the PCA, through a choke line having a second variable choke valve, and through the first variable choke valve. |
申请公布号 |
EP2900897(A2) |
申请公布日期 |
2015.08.05 |
申请号 |
EP20130752783 |
申请日期 |
2013.08.14 |
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 |
|
代理人 |
|
主权项 |
|
地址 |
|