Hydraulic cam motor

Details Hydraulic cam motor Hydraulic cam motor

2006-08-15

2006-08-15

Freay, Charles G. (Department: 3746)

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Radially disposed cylinders

C091S498000

Reexamination Certificate

active

07089847

ABSTRACT:
A compressed fluid driven downhole cam motor (1) of the type used during drilling/service operations in the ground, comprising an intermediate casing (4), a distributing valve (26), a rotor (18) and two or more pistons (48) arranged radially and distributed with equal or unequal separation about the central axis of the rotor (18), whereby the pistons (48) located in the same radial plane constitute a set of pistons, and where two or more sets of pistons are arranged side by side along the longitudinal axis of the rotor (18).

REFERENCES:
patent: 4202252 (1980-05-01), Scheufler et al.
patent: 4225000 (1980-09-01), Maurer
patent: 4828053 (1989-05-01), Maurer et al.
patent: 5558003 (1996-09-01), Bauzou et al.
patent: 2697055 (1994-04-01), None
patent: WO 99/24711 (1999-05-01), None
International Search Report dated Feb. 25, 2002, for application No. PCT/NO01/00452.

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