PERCUSSION HAMMER BIT
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United States of America Patent
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Jun 2, 2016
app pub date -
Aug 20, 2014
filing date -
Aug 20, 2014
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Abstract
A drill bit for use with a percussion drilling apparatus can include an elongated body with a first end, a second end, and a longitudinal surface extending between the first and second ends. A plurality of splines extends along the longitudinal surface of the drill bit internally, and at least one of the splines has an apex, a root, and a planar surface between the apex and root. The planar surface can be oriented at an angle to a plane extending from a center of the drill bit to a midpoint of the apex. The internal splines of the hammer bit correspond to external splines in a hammer casing.
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