无线随钻测量系统的数据报协议.pdf

32 　 5 Vol.32 No.5 　 　 2 011 9 ACTA PET ROLEI SINICA Sept. 2 01 1 :0253-2697 (2 01 1)05-0 887-0 6 1 1 2 李忠伟 　王瑞和 　房　军 (1.　　257061;　2.　　102249) :为了满足无线随钻测量对高传输速率的迫切需要, 避免采用现有固定结构的 据报, 通过分析井下参 的特点, 提出了 一种 适用于无线随钻测量系统的通用、高效、灵活、可扩展的 据报协议。针对系统传输效率提出的增量传输技术避免了冗余 据, 缩 短了 据报长度。设计的 字排列 据域定界方法是对传统 据报定界的改进, 能够根据参 的实际取值来动态调整相应的 据 域大小, 有效地利用了 据报空间。 据报编号方法能够根据需要自行定制 据报格式, 提高了系统的灵活性, 并使系统具有可扩 展性, 能够满足随钻测量系统测量更多参 的需要。 :随钻测量;连续波; 据报协议;增量 据报;完全 据报; 据域定界 :TE2 43 　　　　:A Datagram protocol of wireless MWD system 1 1 2 LI Zhongw ei 　WANG R ihe 　FANG J n (1.Colleg e of P etro leum E ng ineering , Ch ina Univ ersity of P etro leum, D ongy ing 2570 61, Ch ina;2 .K ey L abora tory f or P etro leum E ng ineer ing of the M inis try of E d uca tion, Ch ina Univ ers ity of P etro leum, B eij ing 1022 49, Ch ina ) Abstract:In order to meet the rgent need for high transmission rates of wireless MWD and to avoid the se of c rrently fixed-str c- t red datagram protocol, the paper analyzed the characteristics of downhole parameters and p t forw ard a general, efficient, flexible and scalable datagram protocol which is s itable for wireless MWD system.The proposed incremental transmission technology can a- void red ndancy, shorten the length of the datagram and improve the transmission efficiency of the system.The designed datagram field delimiting method is an improvement to the traditional delimiting method of datagram, which can adj st the size of the corre- sponding data fields according to the act al val es of parameters, so the space of datagram is