Abstract: An assembly for cleaning deposited minerals from the interior passages of first and second axially aligned tubular laterals that extend outwardly in opposite directions from a geothermal well head and removably support first and second gate valves from the free ends thereof. The cleaning of the passages in the tubular laterals as well as passages in the first and second gate valves may be conducted with the assembly without killing the well. The assembly also permits a third vertically disposed gate valve on the well head to be removed for repair and maintenance purposes without killing the well, and this is also possible with the first and second gate valves.

Abstract: A geothermal well head assembly that is so operatively associated with the production string of casing in a well bore that the string of casing may expand and contract longitudinally without placing any substantial strain on the assembly. The geothermal well head assembly is also of such structure that interior components thereof that may be damaged due to the abrasive action of high velocity pressurized geothermal fluid may be withdrawn from the assembly for maintenance or replacement without shutting down the geothermal well. Also the geothermal well head assembly is of such structure that it may be operated either manually or by pressurized fluid.

Abstract: A down hole forward and back scuttling tool capable of being removably connected to a power driven drill string and to an expandable reamer to transmit torque from the drill string to the reamer as the latter is transversely expanded and rotated to form an elongate cavity in the lower portion of the bore hole. The reamer is of a conventional type that permits fluid under pressure to discharge therefrom. The tool during the reaming operation permits fluid under pressure to flow downwardly in a first path through the drill string, tool and reamer to exit from the latter into the cavity and then upwardly through an annulus shaped space defined between the side wall of the bore hole and drill string to the ground surface. Cuttings from the reaming operation drop downwardly due to gravity to the bottom of the cavity. It is desirable that such cuttings be removed from the cavity prior to the latter being packed with gravel. The tool permits these cuttings to be retrieved.