Schlumberger Technology Corporation

Barry Moon

Steven E Buchanan

Vincent Jeffrey Pisio

A coring method includes disposing a coring tool in a borehole adjacent a subterranean formation to be sampled. The method further includes determining a property of the formation and selecting a coring tool operational mode based on the property of the formation. The method also includes obtaining a sample from the formation using the coring tool operational mode. A type of coring shaft also may be selected based on the property of the formation.

Coring tools and related methods

Disposing a coring tool in a borehole adjacent a subterranean formation to be sampled. Determining a property of the formation and selecting a coring tool operational mode based on the property of the formation. Obtaining a sample from the formation using the coring tool operational mode. A type of coring shaft also may be selected based on the property of the formation.

An example coring tool includes a cylindrical body having a leading edge to contact a substance and a cavity defined at least in part by an inner surface of the cylindrical body. The inner surface is to engage and retain a sample from the substance with a plurality of raised features. The raised features are shaped so that at least one of the raised features or an exterior surface of a sample in the cavity deforms to increase a force required to remove the sample from the cavity.

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Nisku, Canada

Barry Moon