Casing punch for wells

Details Casing punch for wells Casing punch for wells

1988-12-05

1990-06-12

Schmidt, Frederick R.

Cutlery

Perforating or indenting implements

83691, 166 55, 166 552, 175402, 175414, B26F 100

Patent

active

049321293

ABSTRACT:
A metal punch is formed of a cylindrical body member having an outer cylindrical surface and a forward workpiece engaging end; an axial bore extends rearwardly from the forward end with the workpiece engaging portion of the being defined from front to rear by planar surfaces in first and second perpendicular planes, first and second transverse cylindrical surfaces and first and second annular arcuate surfaces. The planes intersect along a line passing through the axis, to define cutting edges. The transverse cylindrical surfaces are symmetrical to each other with respect to the axis as are the annular arcuate surfaces.

REFERENCES:
patent: 3320843 (1967-05-01), Schott, Jr.

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