Technology Analysis of the Pipeline Plane Directional Drill from under the Bottom of the Yangtze River

It introduce the equipment of the petroleum pipeline from Ningbo by way of Shanghai to Nanjing from under the bottom of the Yangtze River with the pipeline plane directional drill as well as how to confirm the degree of ingress soil and the degree of export soil and the radius of curvature and the depth under the bottom of the Yangtze River.The methods for ensuring the pipeline intensity and the pulling power are analyzed and then the course of construction is expained.