At present, the thermal recovery method of heavy oil in oilfields is steam huff and puff, which provides thermal energy to the oil layer, increases the temperature of the oil layer rocks and fluids, thereby increases the oil displacement power of the oil reservoir and increases the oil production. Existing problems: 1. The mining is difficult and the cost is high. 2. The high temperature steam requires harsh production equipment. 3. Regular gas injection, multiple operations and high production costs. 4. The traditional method of raising pipe string gas injection causes heat loss. 

Introduction to the integrated system of steam stimulation screw pump injection and production:

1. The supporting technology draws heavily on traditional screw pumps, such as rod string anti-falling and centering technology, pipe string anti-falling and centering technology, single well optimization design technology, frequency conversion control technology, working condition monitoring and fault diagnosis technology, etc.

2. The clearance fit adapts to the characteristics of high temperature working conditions, and has formed a complete and mature integrated injection-production technology.

3. The direct conversion of steam injection and transfer pumping operations with pumps greatly saves steam injection preparation time and operating costs, and increases the production time rate of thermal recovery wells; even if the temperature in the later stage of thermal recovery decreases, the thickening capacity can be fully utilized. Extend thermal recovery cycle.

4. The integrally formed stator ensures the smooth lowering of the rotor during the rotation and extraction process. 80 well times without failure.