However,the channel transmission of drilling fluid pressure,well depth and pump pressure have serious effect on the sampled signal in the measurement while drilling(MWD) system.

• 由于受到钻井特殊条件的限制,井底和地面之间的随钻测量信号难以通过有线方式进行传输,目前工程中主要采用基于钻井液脉冲位置编码调制的无线传输方式。