Abstract:

In order to improve the geological survey technological level of drilling rig, the type of JDD-100 fully-hydraulic multifunctional drilling rig was developed. The drilling rig has the functions of cone penetration test, dynamic penetration test, rotary drilling and rotary drilling with high-frequency vibration and so on. The drilling rig is settled system of drilling parameter measurement and automatic controlling, which can monitor nine parameters and obtain geophysical parameters such as density and resistivity of stratum. According to the structure of rotation power head and the working property of hydraulic motors, the output torque test method of all hydraulic rig was developed. The experiments in laboratory and in field certify that the drilling rig had better application in the clay, gravel and broken formation and the drilling speed in complex stratum can be improved 1.5 times than other rigs.

Key words: engineering geology, engineering geophysical exporation, MWD, multifunctional rig