04979561 is referenced by 40 patents and cites 16 patents.

A positioning tool apparatus for positioning a sliding member of a well tool includes a drag assembly having a longitudinal passageway defined therethrough. An inner mandrel is disposed through the longitudinal passageway of the drag assembly and is longitudinally movable relative to the drag assembly. An operating assembly is provided for selectively operably engaging the sliding member of the well tool in response to longitudinally reciprocating motion of the inner mandrel relative to the drag assembly.

Title
Positioning tool
Application Number
7/435302
Publication Number
4979561
Application Date
November 8, 1989
Publication Date
December 25, 1990
Inventor
David D Szarka
Duncan
OK, US
Agent
L Wayne Beavers
James R Duzan
Assignee
Halliburton Company
OK, US
IPC
E21B 34/14
E21B 23/00
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