摆动阀式泥浆脉冲器电机输出特性及影响因素分析  

Analysis on motor output characteristics and influencing factors of oscillating valve mud pulser

作　　者：曲汉武 尚捷[1] 卢华涛[1] 王智明[1] 陈锟 QU Hanwu;SHANG Jie;LU Huatao;WANG Zhiming;CHEN Kun(China Oilfield Services Limited Oilfield Technology Institute,Beijing 101149,China)

机构地区：[1]中海油田服务股份有限公司,北京101149

出　　处：《煤田地质与勘探》2023年第9期180-188,共9页Coal Geology & Exploration

基　　金：海洋油气勘探国家工程研究中心基础研究类项目(YJB23YF007)。

摘　　要：摆动阀泥浆脉冲器本身可以产生较高频率的载波,成为高速泥浆脉冲传输的较好选择。由于工作时负载力矩复杂,影响因素众多,为电机输出特性研究带来较大困难。利用在井下工作时的动力学平衡方程,通过水循环实验方式测量得到摆动阀电机在最大转矩比电流控制方式下的位置角度和输出电流数据,进而计算井下工作时电机输出转矩和输出功率,并对其影响因素进行综合分析。结果表明,受惯性转矩、弹性转矩和动态水力转矩的影响,电机输出转矩在不同工作频段表现为不同特征;低频段时,电机输出转矩的变化幅度随载波频率的增大而减小,输出功率随载波频率的增大而缓慢增大;中低频段时,电机输出转矩和输出功率在该频段幅度变化较小,相对比较稳定;高频段时,电机输出转矩和输出功率均随频率的增大而快速增大。可以通过增大扭杆刚度系数和降低摆动阀转子轴系转动惯量的方式降低电机在高频段的输出,以保证电机在额定转矩和额定功率下可以控制摆动阀在井下实现高频快速的摆动,产生稳定高载波频率下的泥浆脉冲压力波形,实现高频载波的目的,为随钻测井数据的高速传输提供了保障。The oscillating valve pulser is a better choice for high-speed mud pulse transmission due to its capability of generating a higher frequency carrier.Great difficulties are brought to the research on the motor output characteristics due to the complex load moment and its numerous influencing factors during the operation.Using the dynamic balance equation for the motor operating in underground coal mine,the position angle and output current data of the oscillating valve motor under the Max Torque per Ampere(MTPA)control mode were obtained by measurement in the water cycle experiment.Then,the output torque and output power of the motor operating in underground coal mine was calculated,and its influencing factors were comprehensively analyzed.The research results show that under the influence of inertia torque,elastic torque and dynamic hydraulic torque,the output torque of the motor has different characteristics in different working frequency bands.Specifically,the variation amplitude of motor output torque decreases but the output power increases slowly with the increasing carrier frequency in the low frequency band.Besides,the output torque and output power of the motor are relatively stable in the intermediate frequency band,with little variation.However,both of the output torque and output power of motor increase rapidly with the increasing frequency in the high frequency band.The motor output in the high frequency band can be reduced by increasing the stiffness coefficient of the torsional spring and decreasing the moment of inertia of oscillating swing valve rotor shaft,so as to ensure that the motor can control the oscillating valve under rated torque and rated power to achieve rapid oscillating at high frequency in the well,thereby generating the mud pulse pressure waveform under stable and high carrier frequency to achieve the purpose of high frequency carrier,which guarantees the high speed transmission of measurement while drilling(MWD)data.

关 键 词：摆动阀脉冲器 泥浆脉冲 动力平衡方程 电机输出特性 结构参数优化 随钻测井 

分 类 号：TE927[石油与天然气工程—石油机械设备]