Casing mill

Details Casing mill Casing mill

1985-12-04

1987-12-01

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

With work-engaging structure detachable from cutting edge

408224, 175325, B23B 5106, E21B 1000

Patent

active

047100745

ABSTRACT:
A casing mill is set forth having a cylindrical body with one end adapted to be attached to a drill string and at the other end pilot vanes to guide the mill with respect to the casing. A plurality of blades project outwardly from the body to present a cutting edge for milling of the casing upon rotation of the mill. Polygonal tungsten carbide cutting elements are secured across a forward surface of each blade in a tesselating fashion, each element tilted in the direction of rotation of between 10-20 degrees. To mount the elements, the blade forward surface may include an inclined stairstep arrangement or inclined slots. Each element is brazed or bonded by a suitable organic adhesive to the forward surface.

REFERENCES:
patent: 2360425 (1944-10-01), Kinzbach
patent: 3110084 (1963-11-01), Kinzbach
patent: 4108567 (1978-08-01), Faber
patent: 4189266 (1980-02-01), Koslow
patent: 4564321 (1986-01-01), Kondo et al.
patent: 4586858 (1986-05-01), Kubota
Mechanical Engineers' Handbook, by Lionel S. Marks, 5th Ed. (1951), pp. 1758 to 1769.
Tool Engineers' Handbook, by the American Society of Tool Engineers', 2 Ed. (1959), pp. 21-3 to 21-10.
Metals Handbook, vol. 3, Machining, 8th Ed., American Society for Metals (1967), pp. 48 and 49.

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