Patent ID: 7527103
Filing Date: 2009-05-05
Classification: C09K,E21B

Abstract:
1. A method for protecting a subterranean reservoir during drilling comprising: drilling a well through a subterranean reservoir using a drill-in fluid and a pipe, where: forming a temporary coating with the drill-in fluid over at least a portion of the wellbore wall; positioning the pipe within a wellbore having a wellbore wall at the subterranean reservoir; removing the degradable barrier from the flow conduit; applying hydraulic pressure of a drill-in fluid within the interior space of the pipe and the flow conduit to form a temporary barrier in the flow conduit, and extending the flow conduit in the direction of the wellbore wall; removing the temporary barrier from the flow conduit to at least partially open the flow conduit; and removing the temporary coating on the wellbore wall adjacent the flow conduit.