Adjustable gauge downhole drilling assembly

Details Adjustable gauge downhole drilling assembly Adjustable gauge downhole drilling assembly

E - Fixed Constructions

21

B

E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 23/00 (2006.01) E21B 47/09 (2012.01)

Patent

CA 2234495

A downhole drilling assembly including a housing having an upper end for connection to a drill string and a lower end, a fluid passage extending through the housing from the upper end to the lower end, a power unit contained within the housing, a drive assembly extending within the housing between the power unit and the lower end of the housing such that a mandrel chamber is defined between the drive assembly and the housing, a radially movable stabilizer associated with the housing, and an axially movable mandrel contained within the mandrel chamber, the mandrel being associated with a stabilizer actuator for causing radial movement of the stabilizer in response to axial movement of the mandrel.

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