Being an essential part of Shengli oil field, Down-hole Service Corporation must reduce their cost and gain profits, which is of positive significance of lowering the comprehensive cost of the Shengli Oil Field and decision-making for leaders at all levels.

Application situation and thinking about coiled tubing techniques in downhole operation;

Mechanical analysis software of downhole operation pipe strings and its application;

Application of Visual Simulation in the Downhole Operation;

The accident often happened during down-hole operation such as dropping and sticking.

According to current practice of carrying out unpolluted production in the oil field enterprise, and based on the analysis of the technological processes of down-hole operation, this paper pointed out the distribution of different pollution sources.

The pollutants status of oilfield down-hole operation was analyzed,and the procedures of cleaner production audit in down-hole operation process was introduced.