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Wireless well fluid extraction monitoring system

  • US 9,080,438 B1
  • Filed: 04/02/2012
  • Issued: 07/14/2015
  • Est. Priority Date: 04/02/2012
  • Status: Active Grant
First Claim
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1. A wireless dynamometer system for monitoring a sucker rod driven pump operating in a well fluid extraction process, which operates in conjunction with a computer, the system comprising:

  • a host software application running on the computer;

    a wireless base having a base radio transceiver coupled to a communication port for interface to the computer;

    a wireless remote having a housing with a clamp for clamping onto the sucker rod and moving together therewith, said clamp including a tension adjustment actuator to vary pretension of said clamp about the sucker rod;

    an accelerometer fixed to said housing, which outputs acceleration signals representative of instant acceleration rates of the sucker rod, coupled to a first converter that digitally samples said acceleration signals at a first sampling rate to generate a stream of acceleration data;

    a strain gauge disposed about said clamp, which outputs load signals indicative of instant loads on the sucker rod in accordance with a calibration coefficient, coupled to a second converter that digitally samples said load signals at a second sampling rate to generate a stream of load data, and wherein said strain gauge includes a pretension circuit that outputs a calibration signal indicating said clamp pretension is within an operating range;

    a remote radio transceiver coupled to said first convertor and said second convertor, which communicates with said base radio transceiver in accordance with a radio protocol to communicate host commands from said host software application to said wireless remote and remote commands from said wireless remote to said host software application, and to transfer said stream of acceleration data and said stream of load data to said host software application, and whereinsaid pretension circuit is coupled to communicate said calibration signal to said host software application via said radio protocol, and wherein said host software application transmits a synchronization pulse to said wireless remote to initiate and synchronize said first sampling rate and said second sampling rate, and whereinsaid host software application processes said stream of acceleration data and said stream of load data to generate, and displays on the computer, a real time surface dynagraph, and calculates and displays a real time down-hole pump dynagraph.

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