Hydraulically driven cement downhole mixing enhancer apparatus

A system, comprising:

• a casing disposed in a wellbore within a well, wherein an annulus is created between the casing and the wellbore;
• and
• a mixing pipe section coaxially connected to the casing, the mixing pipe section comprising:
• a turbine assembly assembled to a wall of the mixing pipe section, the turbine assembly comprising:
• a link rod extending through the wall, from an interior of the mixing pipe section to an exterior of the mixing pipe section;
• an inner turbine mounted on the link rod in the interior of the mixing pipe section, wherein the inner turbine is rotatable about the link rod;
• and
• an outer impeller mounted on the link rod at the exterior of the mixing pipe section, such that the outer impeller is disposed in the annulus, wherein the outer impeller is rotatable about the link rod;
• and
• fluid cement filled within the annulus around the mixing pipe section.

A method, comprising:

• providing a string of pipe extending through a well, wherein the string of pipe comprises:
• a plurality of pipe sections threadably connected in an end-to-end fashion;
• a mixing pipe section threadably connected to the plurality of pipe sections;
• an interior flow path extending axially through the string of pipe;
• and
• an exterior annular space extending axially along an exterior of the string of pipe;
• wherein the mixing pipe section comprises:
• a link rod extending through a wall of the mixing pipe section;
• an inner turbine mounted on the link rod and interfacing with the interior flow path in the mixing pipe section;
• and
• an outer impeller mounted on the link rod in the exterior annular space around the mixing pipe section;
• pumping a cement through the interior flow path to hydraulically rotate the inner turbine;
• and
• using hydraulic rotation of the inner turbine to drive rotation of the outer impeller via the link rod connecting the inner turbine and the outer impeller.