Finned impact operated boring tool

Details Finned impact operated boring tool Finned impact operated boring tool

E - Fixed Constructions

21

B

255/13

E21B 7/26 (2006.01)

Patent

CA 1297093

ABSTRACT OF THE DISCLOSURE An impact operated boring tool com- prises an elongated body having a forwardly tapered nose merging to a generally cylindri- cal housing, a generally circular array of fins projecting radially outwardly from said housing rearwardly proximate the juncture of the nose therewith and extending over a course of up to half the length of the tool along the surface of said housing. Each of the fins has a generally rectilinear cross-section through- out the major extent of the length thereof. The fins define a series of grooves there- between having bottoms which are disposed at least as Ear from a longitudinal axis of the housing as the outer surface thereof.

541747

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