Electric Drive Rig Torque Measurement And Its Implication Of The Analysis Of Engineering Information

It is a very obvious phenomenon of the drill string vibrating in the drilling. Some domestic and international researchers have studied character, rule and the systems characteristic of drill string vibrating for thirty years. Understanding the characteristic and creating condition of drill string vibrating can avoid reducing life of drill bit and drill string, so we can high quality and safely complete drill working.In the course of drilling, torque as the typical vibration way can show more than 90% of unusual situation. This should be paid more attention to during studying string vibrating and recording drilling. We judges the status of the drilling tool running in the well, worn of aiguille's situation, stratum rock quality, and whether dog-leg corners exceeding standard at directional drilling etc through it. Monitoring and analyzing the torque not only can control the operating mode of drilling, find the dangerous situation in time, but also, on the foundation of digital signal processing, computer control technology and sensor technology can deal with signal in time field, frequency and wavelet transform, then we can get the character information and status changing of the drill string by these methods.The paper has finished the following research mainly:1) Design the measurement scheme that the electricity drove the systematic torsion of well drilling.2) Using Borland C++ Builder as its developing platform to implement on-line measurement. The man-machine interface of the whole testing software is pleasant. It is able to be operated conveniently and easily.3) According to modern detection theory, select appropriate sensors and make the testing of each parameter more accuracy, reliable, fast and satisfy the requirement of design task finally.4) Using BCB as the base of developing platform, Combine and utilize the strong digital signal processing toolbox of MATLAB, then develop signal measurement of two sets of torsion analysis of software. One can finish measurement and analysis function independently by in breaking away from MATLAB running environment, but not including the wavelet transform function in module of analysis function; The other set must finish measurement and analysis function under having support of MATLAB running environment, but including the wavelet transform module in this set of software. So under the user's demands even more, decide to install by oneself5) After single of drill string vibration was been transacted, this paper presents recognizing method that vibration state change of drill string from time field, frequency and wavelet transform. These methods are following: own correlation analysis; mutual correlation analysis; own power chart analysis; mutual power chart analysis; reciprocal frequency chart analysis; phases chart analysis and wavelet transform. The character information of drill string vibration can been gotten by colligation using these methods, and can preferably wipe off molestation single.In a word, in the course of well drilling, the system for torsion measurement and analyzing, offer effective analysis means and valuable reference by inspecting vibration, at the same time, it is good foundation for researching drill string vibration and intelligent drill at next step.