| 摘要 |
METHOD OF TRANSMITTING ULTRASONIC AMPLITUDE /A TIME TRAVEL INFORMATION OVER A LOGGING CABLE A method for transmitting ultrasonic amplitude and time travel information obtained from borehole logging operations over a logging cable allows accurate measurement of the time travel by surface equipment. The time travel information is transmitted by a time travel pulse, which is produced at a time interval from a synchronization pulse corresponding to the time of travel of an acoustic return. The peak amplitude of the acoustic return is transmitted by a separate amplitude pulse. |
