| 摘要 |
<p>WEIGHT ON DRILL BIT MEASURING APPARATUS A measuring device is provided for measuring the weight applied to a drilling bit or like device in a borehole while the drilling is taking place. The measuring apparatus has a tubular housing adapted to be coupled into a drill string preferably immediately above the drill bit. A transducer is mounted in the tubular housing and measures pressure in a captive fluid chamber within the housing which can be correlated to weight on the measuring apparatus and in turn on the drill bit.</p> |
