Fixed Bladed Drill Bit Force Balanced by Blade Spacing
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United States of America Patent
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app pub date -
Oct 14, 2009
filing date -
Oct 14, 2009
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Abstract
In one aspect of the present invention a force balanced drill bit may comprise a bit body comprising a plurality of fixed blades, each blade comprising cutters defining a cutter profile. Junk slots may be disposed between the blades and define the blade boundaries. The blade boundaries may be spaced apart sufficiently to achieve force balance.In another aspect of the present invention a method of designing a downhole fixed bladed bit comprises the steps of modeling a fixed bladed bit by inputting blade and cutter parameters into a computer program, performing a force balance on the modeled fixed bladed bit, and modifying at least one blade parameter to adjust the force balance. The parameters for modeling a fixed bladed bit include cutter placement on a plurality of blades integrally formed in a bit body and a position for each blade.
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