煤矿井下EM-MWD仪器研制
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摘要
研制了煤矿井下电磁无线随钻测量(EM-MWD)仪器。针对煤矿井下EM-MWD特点,发射频率采用可设置的6.25 Hz与12.5 Hz,编码方式采用省电的差分脉冲位置调制(DPPM),发射机设计省电模式与休眠模式提高电池工作时间,φ73 mm绝缘天线外层涂覆多层金刚砂提高耐磨性,接收机采用RLS自适应滤波提高抗干扰性能。试验结果表明仪器在煤矿井下随钻测量传输距离大于310 m,发射机省电模式与休眠模式工作有效,绝缘天线机械强度与耐磨性达到煤矿井下随钻测量要求。
The underground electromagnetic wireless measurement while drilling(EM-MWD) instrument is developed. According to the characteristics of underground EM-MWD, the transmission frequency can be set as 6.25 Hz and 12.5 Hz, and the encoding method adopts power-saving differential pulse position modulation(DPPM). The transmitter is designed with power saving mode and hibernation mode to extend the battery time. The EM-MWD isolation antenna of φ73 mm is coated with multi-layers emery to improve the wear-ability, and the EM-MWD receiver uses RLS adaptive filter to improve ability of anti-interference performance. Experiments results show that the communication distance of the developed EM-MWD instrument is more than 310 m, the power saving mode and hibernation mode of the transmitter work effectively, and the mechanical strength and wear-ability of the isolation antenna can meet the requirements of the underground coal mining.
The underground electromagnetic wireless measurement while drilling(EM-MWD) instrument is developed. According to the characteristics of underground EM-MWD, the transmission frequency can be set as 6.25 Hz and 12.5 Hz, and the encoding method adopts power-saving differential pulse position modulation(DPPM). The transmitter is designed with power saving mode and hibernation mode to extend the battery time. The EM-MWD isolation antenna of φ73 mm is coated with multi-layers emery to improve the wear-ability, and the EM-MWD receiver uses RLS adaptive filter to improve ability of anti-interference performance. Experiments results show that the communication distance of the developed EM-MWD instrument is more than 310 m, the power saving mode and hibernation mode of the transmitter work effectively, and the mechanical strength and wear-ability of the isolation antenna can meet the requirements of the underground coal mining.
引文
[1]郝光生.采空区顶板高位定向钻孔抽采技术研究[J].煤矿安全,2018,49(5):75-78.
[2]黄森林.精确定向钻进技术在急倾斜煤层老空区探放水中的应用[J].煤矿安全,2018,49(1):104-106.
[3]张甲迪,郝世俊,郑玉柱,等.定向钻进技术在Fd13断层探测中的应用[J].煤矿安全,2018,49(2):128.
[4]王家豪,董浩斌,石智军,等.煤矿井下随钻测量电磁传输信道建模[J].煤炭学报,2015,40(7):1705.
[5]方俊,石智军,李泉新,等.新型煤矿井下定向钻进用有线随钻测量装置[J].工矿自动化,2015,41(8):1.
[6]范业活,李天禄,杨志强.随钻无线传输技术分析与比较[J].测井技术,2016,40(4):455-459.
[7]陈兴祥,刘虎,冉富强.电磁波随钻测量系统(EMWD)现状分析[J].中国石油和化工标准与质量,2017(19):133-135.
[8]王成立,契霍特金,卢春华.EM-MWD传输特性研究及应用前景分析[C]∥2015中国地球科学联合学术年会论文集(十九).北京:中国地球物理学会,2015:1325-1327.
[9]范业活,李威,聂在平,等.基于NMM随钻电磁波传输信道特性分析[J].地球物理学报,2016(3):1125.
[10]熊皓,胡斌杰.随钻测量电磁信道分析的等效传输线法[J].电波科学学报,1995(3):8-14.
[11]范业活,聂在平,李天禄.随钻电磁波传输理论模型与信道特性分析[J].电波科学学报,2013,28(5):909-914.
[12]邵春,付信信,褚志伟,等.基于ANSYS的地层分层对EM-MWD信号传输的影响分析[J].钻采工艺,2017,40(4):7-9.
[13]王家进.基于DPPM编码的EM—MWD节电技术研究[J].石油钻探技术,2013,41(6):106-109.
[2]黄森林.精确定向钻进技术在急倾斜煤层老空区探放水中的应用[J].煤矿安全,2018,49(1):104-106.
[3]张甲迪,郝世俊,郑玉柱,等.定向钻进技术在Fd13断层探测中的应用[J].煤矿安全,2018,49(2):128.
[4]王家豪,董浩斌,石智军,等.煤矿井下随钻测量电磁传输信道建模[J].煤炭学报,2015,40(7):1705.
[5]方俊,石智军,李泉新,等.新型煤矿井下定向钻进用有线随钻测量装置[J].工矿自动化,2015,41(8):1.
[6]范业活,李天禄,杨志强.随钻无线传输技术分析与比较[J].测井技术,2016,40(4):455-459.
[7]陈兴祥,刘虎,冉富强.电磁波随钻测量系统(EMWD)现状分析[J].中国石油和化工标准与质量,2017(19):133-135.
[8]王成立,契霍特金,卢春华.EM-MWD传输特性研究及应用前景分析[C]∥2015中国地球科学联合学术年会论文集(十九).北京:中国地球物理学会,2015:1325-1327.
[9]范业活,李威,聂在平,等.基于NMM随钻电磁波传输信道特性分析[J].地球物理学报,2016(3):1125.
[10]熊皓,胡斌杰.随钻测量电磁信道分析的等效传输线法[J].电波科学学报,1995(3):8-14.
[11]范业活,聂在平,李天禄.随钻电磁波传输理论模型与信道特性分析[J].电波科学学报,2013,28(5):909-914.
[12]邵春,付信信,褚志伟,等.基于ANSYS的地层分层对EM-MWD信号传输的影响分析[J].钻采工艺,2017,40(4):7-9.
[13]王家进.基于DPPM编码的EM—MWD节电技术研究[J].石油钻探技术,2013,41(6):106-109.