Magnetic stuck pipe locator and detonator using a single line to transmit signals

Claim 1

AN APPARATUS FOR DETERMINING THE POINT AT WHICH PIPE IS STUCK IN A WELL BORE COMPRISING, AN ELONGATED NONFERROUS SUPPORT ADAPTED TO BE LOWERED INTO SAID PIPE; A U-SHAPED MAGNETIC CORE CARRIED BY THE SUPPORT IN POSITION SO AS TO BE MAGNETICALLY COUPLED TO THE PIPE; MEANS CONNECTED TO THE SUPPORT FOR HOLDING SAID CORE ADJACENT TO AND MAGNETICALLY COUPLED TO THE PIPE; A SECOND MAGNETIC CORE CARRIED BY SAID SUPPORT AND POSITIONED IN THE MAGNETIC FIELD OF THE U-SHAPED CORE, SAID SECOND CORE POSITIONED AT RIGHT ANGLES TO THE USHAPED CORE; AN EXCITING COIL, ONE SIDE OF WHICH IS CONNECTED TO GROUND SURROUNDING SAID U-SHAPED CORE; A PICKUP COIL SURROUNDING SAID SECOND MAGNETIC CORE; A TESTING CIRCUIT POSITIONED ABOVE GROUND INCLUDING AN A.C. GENERATING SIGNAL CIRCUIT AND A D.C. INDICATING CIRCUIT; A SINGLE ELECTRICAL LINE CONNECTED BETWEEN THE TESTING CIRCUIT AND THE OTHER SIDE OF SAID EXCITING COIL; A PHASE DETECTING CIRCUIT CARRIED BY SAID SUPPORT AND ELECTRICALLY CONNECTED TO THE PICKUP COIL FOR DETERMINING THE MAGNITUDE AND THE DIRECTION OF THE DETECTED CURRENT IN THE PICKUP COIL THEREBY INDICATING THE DIRECTION AND AMOUNT OF TORQUE APPLIED TO THE PIPE; AND CONVERTING MEANS CONNECTED TO THE PHASE DETECTOR CONVERTING THE DETECTED ALTERNATTING CURRENT SIGNAL FROM THE PICKUP COIL INTO A DIRECT CURRENT SIGNAL, SAID CONVERTING MEANS BEING ELECTRICALLY CONNECTED TO THE SINGLE LINE CIRCUIT THEREBY TRANSMITTING A DIRECT CURRENT DETECTION SIGNAL TO THE TESTING CIRCUIT.

Claim 2

AN APPARATUS FOR DETERMINING THE POINT AT WHICH PIPE IS STUCK IN A WELL BORE COMPRISING, AN ELONGATED NONFERROUS SUPPORT ADAPTED TO BE LOWERED INTO SAID PIPE; A U-SHAPED MAGNETIC CORE CARRIED BY THE SUPPORT IN POSITION SO AS TO BE MAGNETICALLY COUPLED TO THE PIPE; MEANS CONNECTED TO THE SUPPORT FOR HOLDING SAID CORE ADJACENT TO AND MAGNETICALLY COUPLED TO THE PIPE; A SECOND MAGNETIC CORE CARRIED BY SAID SUPPORT AND POSITIONED IN THE MAGNETIC FIELD OF THE U-SHAPED CORE, SAID SECOND CORE POSITIONED AT RIGHT ANGLES TO THE USHAPED CORE; AN EXCITING COIL, ONE SIDE OF WHICH IS CONNECTED TO GROUND SURROUNDING SAID U-SHAPED CORE; A PICKUP COIL SURROUNDING SAID SECOND MAGNETIC CORE; A TESTING CIRCUIT POSITIONED ABOVE GROUND INCLUDING AN A.C. GENERATING SIGNAL CIRCUIT AND A D.C. INDICATING CIRCUIT; A SINGLE ELECTRICAL LINE CONNECTED BETWEEN THE TESTING CIRCUIT AND THE OTHER SIDE OF SAID EXCITING COIL; A PHASE DETECTING CIRCUIT CARRIED BY SAID SUPPORT AND ELECTRICALLY CONNECTED TO THE PICKUP COIL FOR DETERMINING THE MAGNITUDE AND THE DIRECTION OF THE DETECTED CURRENT IN THE PICKUP COIL THEREBY INDICATING THE DIRECTION AND AMOUNT OF TORQUE APPLIED TO THE PIPE; AND CONVERTING MEANS CONNECTED TO THE PHASE DETECTOR CONVERTING THE DETECTED ALTERNATTING CURRENT SIGNAL FROM THE PICKUP COIL INTO A DIRECT CURRENT SIGNAL, SAID CONVERTING MEANS BEING ELECTRICALLY CONNECTED TO THE SINGLE LINE CIRCUIT THEREBY TRANSMITTING A DIRECT CURRENT DETECTION SIGNAL TO THE TESTING CIRCUIT.