CPC E21B 7/068 (2013.01) [E21B 7/06 (2013.01); E21B 17/1014 (2013.01); E21B 17/1085 (2013.01)] | 20 Claims |
1. A downhole tool, comprising:
a tool body rotatable about a tool axis; and
a selectively extendible actuator coupled to the tool body, the actuator including a working face arranged and designed to contact a downhole formation, the working face including:
a first surface parallel to the tool axis;
a second surface downhole relative to the first surface and slanted radially inwardly from the first surface at a first slant angle; and
a third surface uphole relative to the first surface and slanted radially inwardly from the first surface at a second slant angle that is different than the first slant angle,
wherein the first, second, and third surfaces are oriented relative to each other in a cross-section through a center of the actuator,
wherein in the cross-section, the first surface includes at least first and second materials with different coefficients of friction, and
wherein the second surface includes the second material, and the third surface includes the first material.
|