Downhole sampling apparatus and method
AssigneeSchlumberger Technology Corporation
InventorTroy Fields
Life of this patent
Estimating the term…
Abstract
A method and apparatus for reducing debris in a perforation in a wellbore extending from the wellbore into a subterranean formations is provided. A housing is positioned in the wellbore, and an arm is extended therefrom. One or more plugs are positionable in the perforation via the arm. The plug is adapted to block debris from formation fluid flowing into the housing via the perforation whereby the contamination in the formation fluid is reduced. The plug may be a filter positionable in the perforation, or a bit activated to dislodge debris.
Claims42
A downhole tool for reducing debris in a perforation in a wellbore, the perforation extending from the wellbore into a subterranean formation, the tool comprising:
- a housing positionable in the wellbore;
- and
- an arm in the housing and extendable therefrom, wherein the arm comprises a flexible shaft;
- and
- at least one debris blocker in the housing, the at least one debris blocker positionable in the perforation via the arm and releasable therein such that when released and positioned in the perforation, the at least one debris blocker prevents debris from flowing through the perforation and into the housing with a formation fluid whereby the contamination in the formation fluid is reduced.
A method for reducing debris in a perforation in a wellbore, the perforation extending front the wellbore into a subterranean formation, comprising:
- positioning a downhole tool in the wellbore, the downhole tool having a bit extendable therefrom;
- using a flexible shaft to position and release the bit in the perforation to block debris as formation fluid flaws from the perforation into the downhole tool whereby contamination is reduced in the formation fluid collected in the downhole tool.
A method for reducing debris in a perforation in a wellbore, the perforation extending from the wellbore into a subterranean formations, comprising:
- positioning a downhole tool in the wellbore, the downhole tool having an arm extendable therefrom;
- using a flexible shaft to position and release at least one debris blocker in the perforation via the arm, the debris blocker-preventing debris from flowing into the downhole tool as formation fluid flows through the perforation into the downhole tool.
Dependencies are inferred from the claim text.