Abstract: Electrical power conductor apparatus for earth boring using a rotary drilling rig and drilling string for mounting a bottom hole electrical motor to rotate a drill bit to form the borehole with electrical power from an electrical power source at the earth surface communicated to the electrical motor by conductor lines positioned in the bore of the drill string and having releasable supporting connectors to enable adding and removing of lengths of conductor lines as desired. The conductor apparatus includes electrical conductors having upper and lower plugs with the upper plug releasably securable with the drilling string and releasable by engagement with a fishing tool to remove the conductor from the drilling string.

Abstract: Method and apparatus for earth boring using a rotary drilling rig and drilling string for mounting a bottom hole electrical motor to rotate a drill bit to form the borehole. Electrical power from an electrical power source at the earth surface is communicated to the electric motor by conductor lines positioned in the bore of the drill string and having releasable supporting connectors to enable adding and removing of lengths of conductor lines as desired. An electrical conductor swivel unit is mounted in the drilling string to enable rotation of the drilling string while operating the electric motor and an extendable electrical connector is provided in the kelly to compensate for variation in conductor lengths while effecting electrical contact with the conductors.

Abstract: Method and apparatus for earth boring using a rotary drilling rig and drilling string for mounting a bottom hole electrical motor to rotate a drill bit to form the borehole. Electrical power from an electrical power source at the earth surface is communicated to the electric motor by conductor lines positioned in the bore of the drill string and having releasable supporting connectors to enable adding and removing of lengths of conductor lines as desired. An electrical conductor swivel unit is mounted in the drilling string to enable rotation of the drilling string while operating the electric motor and an extendable electrical connector is provided in the kelly to compensate for variation in conductor lengths while effecting electrical contact with the conductors.

Abstract: An overshot-grappling tool adapted to be lowered, raised and manipulated to retrieve sections of electrical cable from a well, wherein a plurality of flexible gripping fingers are provided for gripping a termianl connector of the electrical cable section along with releasable means to restrain the gripping fingers under spring pressure for such gripping action and to release the fingers from the terminal connector.

Abstract: An apparatus for feeding and withdrawing sections of electrical cable having substantially rigid terminal connectors at the ends of each section, wherein means are provided for preventing excessive bending of the cable terminal connectors and the cable conductor at an interface between the conductor and connectors to prevent damage thereto during feeding and removal.

Abstract: A reeling apparatus for supplying, receiving and storing a section of electrical cable having substantially rigid terminal connectors at the ends of the section, wherein apparatus are provided for releasably securing at least one of the electrical cable terminal connectors with a rotatable reel of the apparatus for rotation therewith as the electrical cable is wound on and unwound from the reel, and for releasing the releasably secured terminal connector from the reel upon the unwinding of the cable therefrom to thereby release the entire section of the cable from the reel.

Abstract: A method and apparatus for handling electrical cable sections having substantially rigid connectors at the end of each section, wherein the entire fixed length of one or more sections of cable are positioned in and removed from a well bore by rapidly inserting and withdrawing a section of cable employing a rig floor assembly in combination with a cable supply and storage apparatus which are respectively provided with means for preventing excessive bending of the cable terminal connectors and the cable conductor at an interface between the conductor and connectors to prevent damage thereto during insertion and removal.

Abstract: A kelly cock assembly adapted for connection within a tubular drill string above or below the kelly joint for controlling the flow of fluids through the drill string, wherein an electrical conductor means is provided for detachable interconnection with one or more electrical cables provided in the drill string for uninterrupted transportation of electrical energy between a location at the surface and a subsurface location without interferring with fluid flow control by the valve means of the assembly.