| 摘要 |
<p>The short hop communication link includes a sensor module (125) positioned downhole from a motor (100) in a well. The module (125) includes sensors that monitor operational, directional and environmental parameters downhole and provide an electrical data signal indicative thereof. Sensors may also be positioned in the drill bit (50) for obtaining parameters related to the bit, and communicating data signals reflecting the sensed parameters to the sensor module (125). The sensor module (125) includes a transceiver, with an annular antenna (25), for transmitting electromagnetic sensor data signals to a point above the motor (100). A control module (40), which also includes a transceiver with an annular antenna (37), is located above the motor (100), and receives the electromagnetic signals from the sensor module (125) reflecting the sensed parameters. In addition, the control module (40) is capable of transmitting command signals to the sensor module (125) requesting data regarding desired parameters. The command module (40) connects to a host module (10) which orchestrates all measurement-while-drilling components downhole. The host module (10) connect s to a mud pulser (35) for transmitting desired data to the surface for real-time processing. The sensor module (125) is strategically placedwithin a removable, interchangeable sub (200) below the motor (100), or alternatively, within an extended driveshaft (400) of the motor (100), while the sensor antenna (25) is located on an exterior shoulder of the sub (200) or driveshaft (400). The sensor module (125) and an associated battery pack (55) reside within a pressure container (99) which forms pan of a current return path from the sensor antenna (25) t o the circuitry within the sensor module (125).</p> |
