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US 11,230,901 B2Granted
Release lugs for a jarring device
OwnerRobert W. Evansinventor
Life of this patent
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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 releasably 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.
Claims16
A release mechanism for a jarring tool having a mandrel comprising:
- a housing,
- an actuating piston comprising a restrictor orifice and one or more check valves;
- 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 adapted for longitudinal movement within the housing and 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, and one or more springs surrounding and in contact with the release lugs.
4 more elements
A jarring tool comprising:
- a housing;
- an actuating piston comprising a restrictor orifice and one or more check valves;
- a mandrel adapted for longitudinal movement within the housing and having a plurality of axially spaced grooves;
- a trigger sleeve surrounding the mandrel;
- a plurality of axially 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 adapted to cooperate with complimentary surfaces on the trigger sleeve and mandrel,
- said release lugs being positioned between the mandrel and the trigger sleeve;
- and
- one or more springs surrounding and in contact with the release lugs.
5 more elements
Dependencies are inferred from the claim text.