In order to adhere to its own ruling of feudalism,ancient China s rulers attached great importance to the election, control and management,and set up complete and regular systems of official administration,one of which was the system of recommendation and implication,a combination of China s ancient spirit to recommend talents and be involved in implication.

The sorts of the guaranteed recommendation mainly included the emperor decree guaranteed recommendation, the merit rating guaranteed recommendation and the service guaranteed recommendation etc.

Determination of heat transfer coefficient of flow string during continuous gas lift;

Establishment and application of mathematic model of gas distribution optimization for continuous gas lift to Wendong oilfield.;

On the basic of gas-lift technique and technology of gas lift plunger, combining the specific situation of Su 1 gas reservoir, the continuous gas lift Dewatering Gas Production and gas lift plunger gas drainage technology are designed.

Predicting pressure gradient of fluid in oil tubing on the condition of continuous gas-lift;

The investigation of gas-liquid two-phase flow patterns on the condition of continuous gas-lift;

Development and application of continuous lifting surface equipment for formation testing.;