Patent ID: 9080418
Filing Date: 2015-07-14
Classification: E21B

Abstract:
1. An apparatus for controlling a fluid flow in a borehole, the apparatus comprising: a tool body configured to retrieve a fluid sample from a subsurface formation, the tool body having a fluid conduit having an inlet for receiving the fluid sample and an outlet for conveying the fluid sample to a selected location; a mandrel selectively blocking flow along the fluid conduit, the mandrel having a reduced exterior diameter portion; and a seal disposed on the mandrel, the seal including at least one chevron seal element: the seal and the mandrel having: (i) a first position wherein fluid flow is blocked between the seal and the mandrel; and (ii) a second position wherein a fluid flows between the seal and the mandrel and along the reduced diameter portion configured to cooperate with the mandrel to selectively block flow across the fluid conduit.