泥浆液脉宽调制方法实现下行通道

Downlink realized by the mud-pulse width modulation.

下行通道是闭环钻井不可缺少的一环 ,在多种实现方法中 ,并在任务明确的情况下 ,应以安全可靠、传输效率高、误码率低作为下行通道方案选择的主要指标。文章通过在前期有关下行通道研究的基础上 ,对照国外现行的方案进行了方案的重新选择。分析了新方案的基本原理 ,介绍了实现方法及它的继承性和创新性 ,给出了新方案室内与油田的初步试验结果。

Downlink is one of the necessary links for the closed-loop drillings. There are many ways to realize the downlink under definite tasks, and the selections of the downlink schemes must meet the following main requirements: safety and trustiness of the whole system, effective transmission and low error rate. A new scheme based on the former researches and the comparisons with some other schemes abroad is introduced, in which the principle of the new scheme is analyzed, as well as the ways of realization, the successive features and the innovations. In the end, the initial test results of the new scheme are also given.