For oil pipeline explosion-proof electric heating cable 

 Crude oil in the heavy oil is waxy, high pour point, etc. "material difference" in the exploration and production, crude oil from the reservoir through the tubing and pipelines to the gathering and transmission pumping stations, heat loss, so that the oil temperature below the critical flow temperature . This causes the precipitation of wax deposition, the viscosity of the sudden increase, increase the flow pressure drop resulted in the smooth exploitation. "Thermal recovery" is the use of heat sources along adopt lose, by the carriers and crude oil (thick, wax, condensate) heat exchange, to supplement the heat loss, to overcome the above problems, successfully mining purposes. 

 Since the temperature well mixed with the heat cable wellbore heat device works: 

 Jiuzi since the temperature well mixed with the hot cable electric heating devices, since the temperature control wells mixed with heating cable power along the direction of the pipeline to automatically adjust the output power, with the depth of the temperature gradient reverse. Heating along the tubing through the tubing outer wall to maintain a certain constant temperature, in order to achieve viscosity reduction, the wrong solution to increase the efficiency of the pump effect. Its core is heating cable, three groups of PTC heater with conductive polymer PTC Functional Materials, radiation processing is made by extrusion, at every point of the the Jieneng with the temperature of the heating system change its output power reverse change with in order to achieve automatic compensation, automatically adjusts the effect of the automatic control. 

 Main features: 

 Production tubing to provide the necessary heat, the oil temperature is maintained at above the critical point of waxy crude oil and heavy oil. The self-adjusting variable output power of self-temperature heating cable design to achieve the best economic benefits. 

 Self-control performance of the tubing will not overheat, does not produce hot spots or burnt phenomenon due to changes in well conditions. Each point corresponding due to the heating system temperature can be self-adjusting power to the heating cable self-control techniques. Tubing temperature increase, the heating cable will automatically reduce the output of the heat, and vice versa. This way mixed with the heating cable will continue to compensate for temperature fluctuations, while the regular hotline (constant power) is prone to local overheating and burned. 

 Self-control performance to better meet the special requirements of each well, and can be continuous or repeated use, can also be due to further energy-saving needs of the well conditions, especially on a regular basis wax removal and intermittent use. 

 Main advantages: 

 Economy: easy to install and to obtain the most cost-effective heating system according to the design of specific wells. The system instantly on crude oil production in the following manner to produce effect: 

 Reduce the pipeline block of wax and frequent scraping wax in order to stabilize production. 

 Temperature and the viscosity reduction to reduce the flow resistance of the wellbore to increase the efficiency of the pump. 

 C, reduce the pumping load, extend columns pump cycle. 

 Easy to control: Well heating cable output of heat needed to change, so the running costs to a minimum value, after the temporary shut-in tubing will not clog, you can quickly restore the production capacity of the wells. Low flow rate of crude oil will not produce a partially blocked drain phenomenon.