Latch mechanism for use in association with a mechanical...

Details Latch mechanism for use in association with a mechanical... Latch mechanism for use in association with a mechanical...

E - Fixed Constructions

21

B

E21B 31/107 (2006.01)

Patent

CA 2058703

UNITED STATES/CANADA Latch Mechanism for use in Association with a Mechanical Drilling Jar Donald H. Lineham ABSTRACT OF THE DISCLOSURE A latch mechanism for a mechanical drilling jar has a first latch ring having inclined grooves, a second latch ring also having inclined grooves, a split collet disposed between the first and second latch rings, first and second sets of roller bearings disposed in the inclined grooves between the first latch ring and the split collet and between the second latch ring and the split collet respectively, and a set of Belville springs to maintain pressure on the split collet. The inclined grooves convert the axial compressional force imparted by the Belville springs into inwardly directed radial forces.

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