Patent ID: 8770276

Claim:
A downhole tool device disposable in a casing of an oil or gas well, the device comprising: a) a mandrel with an element disposed thereon compressible and radially expandable to seal between the mandrel and the casing, and with a slip ring disposed thereon radially expandable to engage the casing, and with a cone adjacent the slip ring to radially displace the slip ring, and with the element, the slip ring and the cone being pressable against a lower anvil on the mandrel; b) the slip ring and the cone having mating ends, with the slip ring having a tapering wider open end, and the cone having a tapering narrower end insertable into the open end of the slip ring; c) an interior of the open end of the slip ring and an exterior of the tapering narrower end of the cone each having discrete flat facets circumscribing an interior of the open end of the slip ring and an exterior of the tapering narrower end of the cone; and d) the tapering narrower end of the cone having a substantially smooth circumference circumscribing the flat facets, the substantially smooth circumference being free of raised ridges between the flat facets, the substantially smooth circumference extending along an entire longitudinal length of the flat facets and tapering narrower end of the cone.