Drillable slip

Claim 2

A slip for use in anchoring a well tool in a well bore comprising an annular member having an inner inclined surface and a toothed outer periphery, said member having a plurality of weakened sections to facilitate breakage of said member into segments, said weakened sections being provided by circular openings extending longitudinally and completely within the body of said member so that the outer peripheral surfaces and a major portion of the inner peripheral surfaces of said member are circumferentially continuous.

Claim 3

A slip for use in anchoring a well tool in a well bore, comprising an arcuate body having inner inclined surfaces and toothed outer surfaces, said body being weakened at arcuately spaced points by circular openings extending longitudinally and completely within said body, said openings disposed within a major portion of said body in such a manner that inner and outer peripheral surfaces of said major portion are circumferentially continuous.

Claim 4

A slip for use in anchoring a well tool in a well bore, comprising an arcuate body having inner inclined surfaces and toothed outer surfaces, said body being weakened at arcuately spaced points by circular openings extending longitudinally and completely within said body, said openings disposed within a major portion of said body in such a manner that inner and outer peripheral surfaces of said major portion are circumferentially continuous.

Claim 5

A slip for use in anchoring a well tool having an expander in a well bore, comprising an annular body having a generally wedge-shaped cross-section with an inner inclined surface slidably engaging said expander and a toothed outer periphery adapted to grippingly engage a well conduit wall, said body having a plurality of circumferentially spaced weakened sections provided by longitudinally extending circular holes disposed between the inner and outer wall surfaces of the thickest portion of said body, said body being adapted to be broken at said weakened sections into a plurality of separate segments by outward pressure exerted by said expander, said outward pressure being applied in part over internal surfaces disposed immediately inwardly of said holes.

Claim 6

A slip for use in anchoring a well tool having an expander in a well bore, comprising an annular body having a generally wedge-shaped cross-section with an inner inclined surface slidably engaging said expander and a toothed outer periphery adapted to grippingly engage a well conduit wall, said body having a plurality of circumferentially spaced weakened sections provided by longitudinally extending circular holes disposed between the inner and outer wall surfaces of the thickest portion of said body, said body being adapted to be broken at said weakened sections into a plurality of separate segments by outward pressure exerted by said expander, said outward pressure being applied in part over internal surfaces disposed immediately inwardly of said holes.

Claim 7

A slip for use in anchoring a well tool in a well bore, comprising: an annular member having an outer toothed surface, an end surface and an inner wall surface, said inner wall surface having a vertically extending portion and an inclined portion, said member having a plurality of elongated circular bores formed therein with each bore extending generally parallel to said outer toothed surface and To said vertically extending portion of said inner wall surface, each bore opening at one end through said end surface and at the other end through said inclined portion of said inner wall surface, the longitudinal axis of each circular bore being spaced radially with respect to said vertically extending portion of said inner wall surface by a distance greater than the radius dimension of said bore, the plurality of said bores providing weakened sections to facilitate breakage of said member into a plurality of arcuate segments.

Claim 8

A slip for use in anchoring a well tool in a well bore, comprising: an annular member having an outer toothed surface, an end surface and an inner wall surface, said inner wall surface having a vertically extending portion and an inclined portion, said member having a plurality of elongated circular bores formed therein with each bore extending generally parallel to said outer toothed surface and To said vertically extending portion of said inner wall surface, each bore opening at one end through said end surface and at the other end through said inclined portion of said inner wall surface, the longitudinal axis of each circular bore being spaced radially with respect to said vertically extending portion of said inner wall surface by a distance greater than the radius dimension of said bore, the plurality of said bores providing weakened sections to facilitate breakage of said member into a plurality of arcuate segments.