Abstract: A top entry electrical transmission safety assembly for removably effecting electrical communication through a tubing hanger, between an above ground electric power supply cable and an electric power receiving cable that extends upwardly from a motor driven submersible pump in a bore hole. The electric power supply portion of the assembly may be removed from the tubing hanger without removing the latter from a supporting well head. The supporting well head has a bonnet removably secured thereto through which the electric power supply cable extends, which bonnet not only serves its normal function, but acts in a safety capacity to prevent the electrical transmission assembly being uncoupled inadvertently to create an electric arc or spark in a hazardous potentially explosive area such as on an off shore platform or island.

Abstract: A hydraulically operated assembly that may be removably secured to the well head of an oil well to concurrently raise a tubing hanger that has a tubing string supported in either a centered or offset position therefrom to an elevation where replacements or repairs may be made to electrical components including the lower electrical connector. The tubing string upon being lifted is moved to a centered position in the blow out preventer to permit the latter to be closed to gain control of the well if necessary. The assembly eliminates the necessity of moving a rig over the well to service the electrical components therein.

Abstract: A valve supporting tubular assembly capable of being mounted on a geothermal well head, with the tubular assembly of such structure that an internal plug that supports resilient packers and has circumferentially extending teeth defined thereon may be removably locked in a first position to seal the interior of the tubular assembly above the outlets to the valves, the plug may also be moved longitudinally in the tubular assembly to scrape solids deposited on the interior surface thereof by geothermal fluids, and the plug may also be moved to a second position to pack off the interior of the tubular assembly below the valve outlets to permit the valves to be moved or maintenance work performed thereon without shutting down the geothermal well. In addition, the plug is provided with means to equalize the pressure above and below the plug in the tubular assembly to permit the plug and components situated thereabove to be removed from the tubular assembly.

Abstract: A valved assembly capable of being removably mounted on a geothermal well head from which a first casing extends downwardly and is cemented in a bore hole. A second casing of smaller external diameter than that of the interior diameter of the first casing extends downwardly to the hot fluid producing zone, and is concentrically disposed within the first casing. The assembly is characterized by first and second groups of resilient sealing rings, so disposed that longitudinal contraction and expansion of the second casing string may take place without the seal between the interior of the assembly and the ambient atmosphere being disrupted.

Abstract: A resilient seal that may be removably mounted on the downwardly and inwardly tapering bottom portion of a hopper that defines a discharge opening, to cooperate with a gate in the form of a slide plate that normally closes the discharge opening to prevent moisture or water entering the interior of the hopper through the discharge opening when the gate is in a closed position. When the hopper has a water-tight cover mounted thereon, the resilient seal cooperates with the hopper to define a confined space within the interior thereof that is substantially moisture-proof, and one in which granular material, such as rice that is adversely affected by moisture, may be transported or stored.