Abstract: A variable speed pump control system and method which senses operational parameters during the first one half of the down stroke to control pump speed to maximize production. The method and equipment maintains ths fluid level of a well as low as possible while avoiding the pump-off condition. A variable speed motor drives a pump jack and a control means varies the pump speed. Means are provided for simultaneously sensing the pump speed, load on the rod, and the position of the rod in the pump stroke. These measurements are utilized to calculate the power transferred between the rod string and the beam during a portion of the downstroke. Before the pump is continuously operated, a series of measurements are made in the full barrel pumping condition to determine the power transferred between the rod and beam at various speeds. These are utilized to establish a relationship between pump speed and power during a portion of the downstroke.

Abstract: A control system for controlling a cleaning apparatus used for cleaning a steam generator includes a valve manifold which is controlled by a control console to direct a pressurized fluid to either a jetting outlet or a flushing outlet of the cleaning apparatus associated with the steam generator. The control console also controls a motor controller which defines the incremental distance that the jetting outlet is moved within the steam generator to clean different portions of the steam generator. The motor controller is remotely controllable from a platform control device so that the position of the jetting outlet can be changed by a person located on or near the steam generator during initial alignment and limit switch positioning. The control console also controls an evacuation circuit which extracts the fluid pumped into the steam generator and the sludge or other substances loosened therefrom.