METHOD AND APPARATUS FOR PRECISE CONTROL OF WELLBORE FLUID FLOW
摘要
A method for controlling flow of fluid from an annular space in a wellbore includes changing a flow restriction in a fluid flow discharge line from the wellbore annular space. The flow restriction is changed at a rate related to a difference between at least one of a selected fluid flow rate out of the wellbore and an actual fluid flow rate out of the wellbore, and a selected fluid pressure in the annular space and an actual pressure in the annular space.
申请公布号
WO2012037443(A2)
申请公布日期
2012.03.22
申请号
WO2011US51898
申请日期
2011.09.16
申请人
SMITH INTERNATIONAL, INC.;REITSMA, DONALD;SEHSAH, OSSAMA R.;COUTURIER, YAWAN