Electrical signal transmission for well drilling

• US 3,253,245 A
• Filed: 03/05/1965
• Issued: 05/24/1966
• Est. Priority Date: 03/05/1965
• Status: Expired due to Term

• Current Assignee: Harry Brandt
• Original Assignee: Harry Brandt
• Inventors: Brandt, Harry
• Application Number:
  US04/445,819
• Time in Patent Office: 445 Days
• US Class Current: 439/191
• CPC Class Codes: E21B 17/0285 characterised by electrically insulating elements
• CPC Class Codes: E21B 47/12 Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• CPC Class Codes: G01V 11/002 Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant means for transmitting well survey signals E21B47/12; signal transmission systems in general G08C; transmission in general H04B
• CPC Class Codes: H01R 13/523 for use under water

Claims

2. APPARATUS FOR USE IN A BOREHOLE ELECTRICAL SYSTEM COMPRISING A DRILL PIPE HAVING A PIN AND A BOX END, SAID PIPE ADAPTED TO BE CONNECTED WITH OTHER DRILL PIPES TO FORM A DRILL STRING, AN INSULATED CABLE CONTAINED INTERIORLY OF SAID PIPE, A FIRST ELECTRICAL CONNECTOR CONNECTED TO ONE END OF SAID CABLE, SAID FIRST ELECTRICAL CONNECTOR INCLUDING A FIRST ANNULAR CONNECTING TERMINAL INSULATED FROM ELECTRICAL CONTACT WITH SAID DRILL PIPE, FIRST LOCKING MEANS IN ONE END OF SAID PIPE REMOVABLY SECURING SAID FIRST ELECTRICAL CONNECTOR IN ONE END OF SAID DRILL PIPE, A SECOND ELECTRICAL CONNECTOR CONNECTED TO THE OTHER END OF SAID CABLE, SAID SECOND ELECTRICAL CONNECTOR INCLUDING A SECOND ANNULAR CONNECTING TERMINAL RESILIENTLY MOUNTED AND INSULATED FROM ELECTRICAL CONTACT WITH SAID DRILL PIPE, SECOND LOCKING MEANS IN THE OTHER END OF SAID PIPE REMOVABLY