Boring or penetrating the earth – Below-ground impact members – Resiliently biased
Patent
1983-12-22
1985-04-23
Leppink, James A.
Boring or penetrating the earth
Below-ground impact members
Resiliently biased
175321, 166178, 464 21, E21B 1707
Patent
active
045124248
ABSTRACT:
The present invention comprises a pressure balanced tubular spring slip-joint and jar including a generally tubular outer housing having longitudinal slot means in the wall thereof, and a hammer area of increased wall thickness at one end thereof, within which housing slidably extends a jar mandrel means having first and second longitudinally spaced enlarged diameter anvil areas, at least one fastener tapped into one of those anvil areas, the heads of said fastener protruding into said slot means. Both said housing and said mandrel means possesses axial bores therethrough, which are placed in communication via the bore of a tubular spring within the housing, whereby during extension and contraction of the slip-joint and jar means of the present invention the area within said axial bores and said spring bore is of a constant volume. The invention may be employed to provide force impulses in either longitudinal direction, said tubular spring aiding the application of those impulses when said housing and said mandrel means move relatively toward each other. By proper selection of spring length and use of a coiled spring having spaced coils, the present invention may also be employed as a bi-directional shock absorber.
REFERENCES:
patent: 3189098 (1965-06-01), Haeber
patent: 3254508 (1966-06-01), Garrett
patent: 3447340 (1969-06-01), Garrett
patent: 3461916 (1969-08-01), Ledgerwood, Jr.
patent: 3913668 (1975-10-01), Todd et al.
patent: 4067202 (1978-01-01), Reed
Dang Hoang C.
Halliburton Company
Leppink James A.
Walkowski Joseph A.
Weaver Thomas R.
LandOfFree
Tubular spring slip-joint and 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 Tubular spring slip-joint and jar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tubular spring slip-joint and jar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-32038