| 摘要 |
<p>A downhole drilling efficiency sensor (DES) apparatus for use in oil and gas exploration, measures important drilling parameters near the drill bit for increasing effectiveness and productivity of the drilling operations. Parameters measured include weight-on-bit (WOB), torque-on-bit (TOB), bending-on-bit (BOB), annulus pressure, internal bore pressure, triaxial vibration (DDS for drilling dynamics sensor), annulus temperature, load cells (10a, 10c) temperature, and drill collar wall (8) inside diameter temperature of a drill string (12). The direction of the bending-on-bit measurement is also determined with respect to the low side of the hole while rotating (or stationary) by using a triaxial vibration sensor and magnetometer array (72). The device combines pressure sensors (74), temperature readings and other sensors capable of collectin all the indicated parameters, for presenting them to the drilling operator such that an accurate views of the downhole drilling parameters, as thermally isolated (66) from thermal effects of borehole fluid (66) are obtained via side wall readout (64).</p> |
