Invention Grant
- Patent Title: Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore
- Patent Title (中): 将流体入口从地下井筒中循环而不关闭井眼的方法
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Application No.: US12786456Application Date: 2010-05-25
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Publication No.: US08413722B2Publication Date: 2013-04-09
- Inventor: John Cohen
- Applicant: John Cohen
- Applicant Address: NO Straume
- Assignee: AGR Subsea, A.S.
- Current Assignee: AGR Subsea, A.S.
- Current Assignee Address: NO Straume
- Agent Richard A. Fagin
- Main IPC: E21B7/12
- IPC: E21B7/12 ; E21B47/00
Abstract:
A method for removing a fluid influx from a subsea wellbore drilled using a pump to return fluid from the wellbore to the surface. The method includes detecting the influx when a rate of the return pump increases. Flow from the wellbore is diverted from the return pump to a choke line when the influx reaches the wellhead. A choke in the choke line is operated so that a rate of fluid pumped into the wellbore is substantially equal to a flow rate through the choke line. Fluid flow from the wellbore is redirected to the return pump inlet when the influx has substantially left the well.
Public/Granted literature
- US20110290494A1 METHOD FOR CIRCULATING A FLUID ENTRY OUT OF A SUBSURFACE WELLBORE WITHOUT SHUTTING IN THE WELLBORE Public/Granted day:2011-12-01
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