hole section drilling with mud in the Longgang area,the influencing factor of the low ROP is explained from the bit type,drilling parameters,formation condition,also,the feasible drilling scheme is given in the view of the practical interval,which has actual meaning to increase the ROP of 121/4in.

The Research on Measurement of Micro-drill Core Dimensions;

Study on rock mechanics parameters and drill bit selections for Liuhua oilfield in South China Sea.;

Through the comparison and analyses of data collected from recently drilled well in Erdos Work Area, the bit model and drilling parameters of each well section and each district were optimized.

The Application Of Mud Logging Data In Bit Selection;

In model selection, using the modified drill cost in every meter as a standard can efficiently eliminats the effect of non-formation factor to bit selection.