Indexing assembly for a downhole tool

Details Indexing assembly for a downhole tool Indexing assembly for a downhole tool

E - Fixed Constructions

21

B

166/1

E21B 47/00 (2006.01) E21B 34/10 (2006.01) E21B 43/25 (2006.01) E21B 47/06 (2006.01) E21B 47/10 (2006.01) E21B 49/08 (2006.01)

Patent

CA 1229039

ABSTRACT The disclosure describes an indexing assembly for a downhole tool, comprising a fluid filled chamber; a pressure responsive double-acting piston including a piston sleeve disposed in the fluid-filled chamber; first and second shoulders on the piston sleeve; first and second pistons associated with said piston sleeve and adapted to seat on the first and the second shoulders respectively; and a biasing device adapted to bias the first and second pistons toward the respective first and second shoulders; first and second longitudinally spaced pistons stops in the fluid- filled chamber respectively associated with the first and second pistons and adapted to prevent the seating when in contact with their associated pistons; and a ball and slot ratchet associated with the ratchet.

528670

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