Ball operated J-slot

Details Ball operated J-slot Ball operated J-slot

1980-05-22

1982-10-26

Leppink, James A.

Wells

Detents or clutches

Lug in closed branched slot

166331, 74 57, E21B 2300

Patent

active

043556850

ABSTRACT:
A downhole tool includes inner and outer telescoping cylindrical members. The inner cylindrical member has a cylindrical indexing sleeve disposed thereabout. A groove having a semi-circular cross section is disposed in a cylindrical outer surface of the indexing sleeve. Connected to the outer cylindrical member is an apparatus for holding a spherical ball so that approximately one-half the ball is engaged with the semi-circular cross section groove and the other of the ball is disposed within a radial bore in the outer cylindrical member. Relative movement between the inner and outer cylindrical members is defined by engagement of the spherical ball with the groove. The spherical ball is biased toward the groove by a compression spring or a displaceable fluid under pressure.

REFERENCES:
patent: 1233858 (1917-07-01), Farmer
patent: 2280785 (1942-04-01), Boynton
patent: 3054454 (1962-09-01), Evans
patent: 3703104 (1972-11-01), Tamplen
patent: 4101157 (1978-07-01), Richey
patent: 4113012 (1978-09-01), Evans et al.

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