A device fitted with a hinged collar and bowsprings to keep the casing or liner in the center of the wellbore to help ensure efficient placement of a cement sheath around the casing string. It is being lowered into the hole after drilling has reached total depth and the drill string withdrawn. This allows the casing string to be cemented to the borehole without any 'thin' cement areas. For price, specification and other details please contact us.
