CUTTER BLOCK FOR A DOWNHOLE UNDERREAMER
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United States of America Patent
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Issued Date -
May 28, 2015
app pub date -
Nov 24, 2014
filing date -
Nov 25, 2013
priority date (Note) -
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Abstract
A downhole tool has a body with a bore formed at least partially therethrough. A cutter block may be coupled to the body and move radially outward from the body in response to an increased pressure in the bore. The cutter block may include an outer surface that transitions from a first portion to a second portion, with the first portion being downhole of the second portion. A radius of curvature between the first and second portions may be less than about 7 cm. The second portion or a line tangential thereto may be oriented at an angle from about 60° to about 120° with respect to a central longitudinal axis of the body. A plurality of cutting elements may be disposed on the outer surface of the cutter block. At least one of the cutting elements may be disposed at least partially on the first or second portion of the outer surface.
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