Auto set bi-directional jar

Details Auto set bi-directional jar Auto set bi-directional jar

1993-05-06

1994-07-19

Bui, Thuy M.

Boring or penetrating the earth

Below-ground impact members

Resiliently biased

166178, E21B 31107

Patent

active

053300181

ABSTRACT:
An automatic set bi-directional apparatus for jarring an object in a well bore is disclosed. The apparatus comprises a tubular member having a portion defining an upper and lower striking shoulder, said tubular member having one end connected to a work string capable of creating a longitudinal force. A mandrel is connected to the object and the mandrel is concentrically disposed within said tubular member. The apparatus further includes a plurality of elongated members and an upper and lower ring members which serve as latch means. The mandrel further comprises a first and second grooved portion which are used for releasing the tubular member in order to deliver either an upward or downward jarring impact upon a stationary anvil.

REFERENCES:
patent: 2634102 (1953-04-01), Howard
patent: 4333542 (1982-06-01), Taylor
patent: 4688649 (1987-08-01), Buck
patent: 4844157 (1989-07-01), Taylor
patent: 4846273 (1989-07-01), Anderson
patent: 4865125 (1989-09-01), De Cuir
patent: 4889198 (1989-12-01), Buck
patent: 5139086 (1992-08-01), Griffith, Sr.

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