Hydraulic jarring tool

Details Hydraulic jarring tool Hydraulic jarring tool

1980-10-14

1982-08-31

Novosad, Stephen J.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

166178, E21B 414, E21B 31107

Patent

active

043467709

ABSTRACT:
A hydraulic well jar of the type having a longitudinally slidable inner mandrel within an outer case, the inner mandrel having a hammer element threon which impacts on an anvil element in the case. Hydraulic fluid is disposed between the case and mandrel. Initial movement of the mandrel with respect to the case is impeded by a hydraulic fluid metering jet mechanism, which is bypassed as the mandrel reaches a predetermined point in its travel, allowing a sudden, more rapid movement of the mandrel, thereby generating a greater impact force. The present invention comprises an improved fluid bypass design, as well as an improved mounting system for the hydraulic fluid screen and jet of the metering mechanism. An improved seal arrangement between the metering mechanism, which is attached to the mandrel and the interior of the outer case provides greater seal life and better performance for the jar.

REFERENCES:
patent: 3209843 (1965-10-01), Webb
patent: 3285353 (1966-11-01), Young
patent: 3399740 (1968-09-01), Barrington
patent: 3429389 (1969-02-01), Barrington
patent: 3955634 (1976-05-01), Slator et al.
patent: 4023630 (1977-05-01), Perkin et al.
patent: 4098338 (1978-07-01), Perkins
patent: 4161224 (1979-07-01), Hostrup
patent: 4196782 (1980-04-01), Blanton
patent: 4200158 (1980-04-01), Perkins

Affiliated with

Also associated with

Rating

Hydraulic jarring tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic jarring tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic jarring tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2180711