Flow control module for a rotary steerable drilling assembly

A tool string, comprising:

• a bit shaft rotatable about a longitudinal axis of the bit shaft;
• an offset mandrel for adjusting the longitudinal axis of the bit shaft;
• a drive mechanism configured to rotate the offset mandrel independently of the bit shaft;
• a flow control module configured to direct a fluid flow to the drive mechanism and including:
• an inner body and an outer body, defining an annulus there between;
• and
• one or more blades within the annulus, each of the blades rotatably connected to the inner body or the outer body with a pivot section, each pivot section defining an axis of rotation for each of the blades, each axis of rotation providing a range of angles with respect to a longitudinal axis of the flow control module, wherein each of the blades is bilaterally symmetrical about the axis of rotation and includes a first segment and a second segment that extend into opposite directions an equal distance away from the axis of rotation;
• and
• a controller configured to adjust the blades such that the drive mechanism is maintained in a substantially geostationary position and rotates in a direction opposite of a rotational direction of the bit shaft.