04355685 is referenced by 75 patents and cites 6 patents.

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.

Title
Ball operated J-slot
Application Number
6/152162
Publication Number
4355685
Application Date
May 22, 1980
Publication Date
October 26, 1982
Inventor
Harold K Beck
Duncan
OK, US
Agent
Lucian Wayne Beavers
James R Duzan
John H Tregoning
Assignee
Halliburton Services
OK, US
IPC
E21B 23/00
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