Patent ID: 7325630
Filing Date: 2008-02-05
Classification: E21B

Abstract:
1. A well reamer comprising a housing having a central channel, a plurality of inclined slots, and a plurality of inclined bores; a rod in the central channel; a spring biasing the rod toward a lower end of the housing; a plurality of legs supported for movement along the inclined slots; the legs include a plurality of cutters supported on the legs; and a plurality of pistons in the inclined bores; the pistons are operatively connected to the legs to move the legs and the cutters between an operating position and a transport position along the inclined slots; wherein each of the legs is connected to a respective one of the plurality of pistons; each of the plurality of pistons has a free-end that is operatively connected to the rod in the central channel so that the rod and the legs are movable by the pistons between the operating position and the transport position.