Abstract: Multiple trips of the pipe string during sand flushing, water blocking, steam huff and puff, et al. of the heavy oil production wells lead to the problems of high cost of measures and low production rate. To this end, a ball-actuated multifunctional oil pump is developed in consideration of the actual needs of the site. On the basis of the conventional tubular oil pump, an open fixed valve assembly was developed, and the structure of the core components such as the slider sleeve, the support spring, and the fixed valve seat were optimized and designed to form three types of ball-actuated multifunctional oil pumps. Before the ball is actuated, the pump pipe is used to implement the corresponding measures for the oil well. After the measures are implemented, the fixed ball is actuated, the sucker rod and piston are run in, and the pump can be directly transferred to production, which makes the operation link of pulling up the pipe string and running the pump again omitted, and meets the on-site requirements of one-time pipe string completion for oil well steam injection, sand flushing, water blocking and other processes. This technology has been applied for 29 well times in total, with a success rate of 100%. The ball-actuated multifunctional oil pump can effectively simplify the operation and construction process, reduce the operation cost, improve the production rate of oil wells, and provide technical support for the efficient production of heavy oil wells.

Key words: oil pump, ball actuating, fixed valve, primary string, heavy oil