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 4/00 (2006.01) E21B 4/18 (2006.01) E21B 17/10 (2006.01) E21B 17/20 (2006.01) E21B 47/024 (2006.01) E21B 47/14 (2006.01)

Patent

CA 2285759

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 first stabilizer associated with the housing and located between the power unit and the lower end of the housing, an axially movable mandrel contained within the mandrel chamber, the mandrel being associated with a stabilizer actuator for causing radial movement of the first stabilizer in response to axial movement of the mandrel, and a sensor apparatus located between the power unit and the lower end of the housing for sensing at least one drilling parameter. The drilling assembly may also include a second stabilizer located between the power unit and the lower end of the housing and a bent housing assembly located between the power unit and the lower end of the housing.

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