| 摘要 |
Drilling systems are disclosed that measure the rotational speed of a mud motor. One drilling system includes a mud motor arranged in a drill string and having a turbine shaft operatively coupled to a drill bit and a plurality of turbine stages axially arranged along a portion of the turbine shaft, a measure-while-drilling (MWD) tool operatively and communicably coupled to the mud motor and including a pressure sensor configured to detect pressure pulses generated by the mud motor and generate data signals corresponding to the pressure pulses, an electronics module communicably coupled to the pressure sensor and configured to process the data signals and thereby calculate a rotational speed of the mud motor, and a communications module communicably coupled to the electronics module and configured to transmit signals indicative of the rotational speed of the mud motor to a surface location. |
