Hollow Sucker Rod Heat Production Design

As domestic heavy oil development gradually increase, the proportion of the hollow sucker rod heat production unit of heavy oil exploitation because of its simple structure and high thermal efficiency characteristics favored by domestic and foreign users of all ages, has a wide application range. Heat production unit comprises a hollow rod electric heating, electric heating screw pump wells, hollow rod mixing light devices, etc. But in the course of the field, but also exposed some problems. In order to meet the demand of the use of complex well conditions, solving some problems effectively, promote the application of hollow sucker rod supporting products, and implement a comprehensive upgrade and update products, this paper made the following several aspects.The development of hollow rod pump explosion-proof power converter, to ensure the security and stability of the screw pump electrical heating means. The development of coalbed methane is special hollow sucker rod well-flushing technique, not to mention when working oil pipe and pump barrel, by using hollow sucker rod injection of high pressure water, rinse the pump barrel and fixed valve in stockpile of pulverized coal, and carried to the ground, shorten the operation time. The structure of doped rare well watered one-way valve was improved, put an end to the production process easy blocking problem. The structure of the cartridge to be improved BOP box from a secondary seal to the seal, and the shutter to improve the sealing rubber seals and packing materials and dimensions, to enhance the sealing reliability. Developed wellhead cable sealing device, to avoid breaking off the hollow rod caused wellhead oil spill. Research the driving rod centralizer structure in order to solve the activity type centralizer as well as the problems of the eccentric wear of rod body casting centralizer root stress concentration of the rod fracture problem. For different well conditions, the use of the rod string checking software hollow rod heat production unit optimized design, reasonable matching rod string and ancillary products to meet the needs of users.