Auto set bi-directional jar
OwnerJerry Griffithinventor
Life of this patent
Estimating the term…
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.
Claims17
A jarring apparatus, comprising:
- a cylindrical housing containing hammer means;
- a mandrel slidably disposed within said housing to form a spring chamber, said mandrel containing anvil means;
- latch means for latching said mandrel to said cylindrical housing;
- biasing means, positioned within the spring chamber, for biasing said latch means in an engaged position within said housing;
- and wherein said mandrel further contains:
- first releasing means for releasing said latch means and allowing said hammer means to deliver an upper impact to said anvil means;
- and
- second releasing means for releasing said latch means and allowing said hammer means to deliver a downward impact to said anvil means.
An automatic set bi-directional apparatus for jarring an object in a well bore, comprising:
- 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 concentrically disposed within said tubular member, said mandrel having a first end and a second end, said second end being connected to the object, said mandrel containing an upper shoulder, and lower shoulder;
- latch means for latching said housing to said mandrel;
- a spring disposed about said mandrel and cooperating with said latch means;
- upper releasing means, located on said mandrel, for releasing said tubular member so that said lower striker shoulder strikes said lower shoulder of said mandrel;
- lower releasing means, located on said mandrel, for releasing said tubular member so that said upper striking shoulder strikes said upper shoulder of said mandrel;
- and
- engaging means for engaging said latch means with said upper and lower releasing means.
Dependencies are inferred from the claim text.