Well jar

Details Well jar Well jar

1976-09-13

1977-07-19

Leppink, James A.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

175304, E21B 110

Patent

active

040363120

ABSTRACT:
A well jar is characterized by inner and outer telescoped members held from relative displacement by a latching member having an extending portion thereon. Imposition of an axially directed triggering force exceeding a predetermined magnitude is transmitted against the biasing force of a resilient member through a force transmitting arrangement to a latch release member provided with an opening therein sized to receive the extending portion of the latching member. The release member rotates in a predetermined angular direction to come into registry with the opening therein to receive the extending portion of the latching member as the latching member displaces radially outwardly to release the inner member. Upon release, the inner member responds to the axially directed force to drive impact surfaces disposed on the inner and outer members into an impact-producing engagement.

REFERENCES:
patent: 2101968 (1937-12-01), Wickersham
patent: 2354709 (1944-08-01), Shaffer
patent: 2474459 (1949-06-01), Beck
patent: 2550142 (1951-04-01), Dumble
patent: 3658140 (1972-04-01), Berryman
patent: 3963081 (1976-06-01), Anderson et al.

Affiliated with

Also associated with

Rating

Well jar does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2289000