Analysis of shortcoming of M-1 down hole problems dealing

This article introduce M-1 down hole problems during drilling operation for analysis Operator’s fault when dealing with down hole problems. Through review the process of the first spud in, the second spud in and the third spud in, and give comment to each process and analysis what’s wrong with the operation. At last get a conclusion: The major mistakes is decision-making. After the second spud in, the situation of severe collapse and shrinkage of the upper formation and losses of the lower formation. At the third spud in, due to the low density of the mud, the water loss is high. For the control of the trajectory of the 8 1/2” wellbore, the decision maker is a bit ridiculous. Those summary will give other drilling contractors some experience whom will drill well in this block in the nearly future.