Release Lugs for a Jarring Device

摘要

A release mechanism for a jarring tool is formed by a plurality of segmented release lugs. Each lug includes a plurality of axial spaced projections on an inner surface and a plurality of grooves on an outer surface. The projections have either different widths or are separated by varying distances and releaseably engage corresponding grooves in a mandrel located within a housing of the tool. The release lugs are positioned between a trigger sleeve and the mandrel.

主权项

1. A release mechanism for a jarring tool having a mandrel comprising:
a plurality of arcuate release lugs, each release lug including an inner surface and an outer surface; a plurality of axially spaced projections on the inner surface of the release lugs and a plurality of grooves on the outer surface of the release lugs; a mandrel having a plurality of axially spaced grooves on an outer surface of the mandrel; and an annular trigger sleeve surrounding the mandrel, the release lugs being positioned between the annular trigger sleeve and the mandrel.