Abstract: A rotating head having a bowl assembly and a rotating assembly disposed in a bowl opening formed in the bowl assembly. The rotating assembly comprises and elastomeric member and a rotating bushing. The rotating bushing is connected to an outer peripheral surface of the elastomeric member. The rotating bushing bearingly contacts a portion of the bowl assembly during the operation of the rotating head wherein the elastomeric member and the rotating bushing are rotated and the elastomeric member sealingly engages a portion of the bowl assembly for forming a seal between the rotating assembly and the bowl assembly. The rotating assembly is removable from the bowl assembly and can be replaced with another rotating assembly thereby simultaneously replacing the elastomeric member and the rotating bushing.

Abstract: An improved rotating head having an inner barrel disposed within and rotatingly supported on an outer barrel wherein a rotary drive member is connected to the inner barrel. A kelly is extendable through the inner barrel and the rotary drive member is adapted to grippingly and sealingly engage the kelly so that rotation of the kelly causes rotation of the rotary drive member and the inner barrel connected thereto, the engagement between the rotary drive member and the kelly providing the sole source for rotating the rotary drive member and the inner barrel connected thereto. The rotary head also includes a bearing adjustment assembly which facilitates the rotatability of the inner barrel.