dq-lwd随钻测井仪器的可靠性设计.pdfVIP

■质量安全论坛 DQ—LWD随钻测井仪器的可靠性设计 -蒹熟纛纛蒜黛羿裟裂然誉嚣‰， 摘要随钻测井仪器在井下高温、剧烈震动的环境下工作，容易发生失效，较高的故障率会直接影响施工进度，所以有必要进 一步提高仪器的可靠性能。通过对DQ—LwD随钻测井仪器在水平井作业中出现的失效现象和维修过程中发现的问题进行统 计分析，总结出该仪器3类典型故障原因：电子器件故障、电气连接失效、抗振能力不足，进而开展了随钻测井仪器井下失效预 防方法的研究。把可靠性设计引入到传统的仪器设计、生产、维修流程中，提出了装配电路板(PcBA)测试、防静电击穿fEsD防 护)、电气连接失效预防以及PCBA减振防护等一系列提高可靠性的设计方法。现场施工应用表明，故障率与2013年同期相比 有明显下降，有利于仪器在复杂井况、高温高压深井的进一步应用。 关键词随钻测井；随钻测井仪器；可靠性设计；井下失效 Abstract while t001worksindownhoIe andseverevibration itsfailure occurs． envifonment，so l。ogging drilIing hightemperature easily failureratewjll afkctthe ofthe itis tofunher the ofthet001． High djrectly progressconstruc“on，sonecessary improvereliability in thesta【istical ofIhefailure thehorizontalwell ofthe while tool Thmugh analysis phenomenaappearing operationsloggingdrillingDQ— I．WDandthe foundi11fhe of of failureofthet001aresummed：failureofelectmnic it，three devices， pmbIems repairpmcess typestypical failureofelectricalconnectionandinsumcientantivibration thenthedownholefailure methodsfbrthe ability，and prevention logging while tool ares【udied．The isintroducedintothetraditional andmaintenance drillingDQ—LwD reliabiljtydesign design，production pro— cess0f ase“esof mefhodsfor the ofthe eircuit instruments，and design implovingIeliabilitytool，includingassemblyboard(PCBA)fes卜 electrostatic connectionfailure PCBAvibration ing，anti breakdown(ESDpro【eclion)，elecfrical prevencion，the reducingpIDteccion，etc．， are for、Ⅳard．Field showsthat wi【hthesame in failurerateis is 2013，【he decreased，which put