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US 2020/0048976 A1Published application
Release Lugs for a Jarring Device
OwnerRobert W. Evansinventor
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Abstract
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. The release lugs may be supported by an annular ring member.
Claims11
A release mechanism for a jarring tool 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,
- each release lug including an interior groove axially spaced from the projections on the inner surface of the release lugs and, an annular ring member positioned within the interior groove of the release lugs such that sides of the ring member fully engage sides of the interior groove of the release lugs in a rest position.
A jarring tool comprising:
- a housing;
- a mandrel having a longitudinal axis and plurality of axially spaced grooves;
- a trigger sleeve surrounding the mandrel;
- a plurality of longitudinally extending arcuate release lugs having an inner and outer surface, each lug including a plurality of axially spaced projections on its inner surface and a plurality of grooves on its outer surface;
- said release lugs being positioned between the mandrel and the trigger sleeve;
- and having an interior groove,
- a spring means surrounding the mandrel and,
- an annular ring member positioned within the groove of the release lugs, the release lugs and the annular ring member being longitudinally moveable with respect to the mandrel and the trigger sleeve as the mandrel is released from the release lugs.
5 more elements
Dependencies are inferred from the claim text.