DEVELOPMENT AND APPLICATION OF PUMP-OFF CONTROLLING IN THE SWABBING WELL

Basing on the pump-off controller combining oil production engineering micro-electronic technology and combing the reservoir engineering, pump-off controller has been reconstructed according to the characteristic of limited but stable liquid giving. As result, the parts for testing and estimating were separated; linear control changed as off-line control and long-period controlling system was made. For the inaccuracy of single-parameter-controlling, multi-parameter-controlling system was proposed. Using time-controller, new type of controller was developed. With the regular controlling, rational operation was certified and easy-maintenance was made.