Allen Lindsey, D-Jax Corp.
Numerous types of pump off control devices have been available to producers and operators since the late 1960"s. Since that time, pump off controllers have proven themselves to be invaluable in reducing lifting costs and increasing pumping system efficiency. This technology has, in general, been applied only in cases where economic justification is assured. Sadly, marginal (or stripper) production does not justify the expense and maintenance of most controllers. Therein lies a paradox - the wells that could economically benefit most from the application of pump off controllers were excluded from consideration due to economic constraints. The need for a simple, inexpensive and reliable POC became abundantly clear. By taking a unique approach to the detection of pump off, D-JAX Corporation of Midland, Texas has been able to reduce the complexity of pump off controllers, making them more reliable and less costly. A large majority of marginally producing wells are now within the economic threshold of pump off controller applications. This paper discusses the required functions and attributes of a pump off controller, proper selection of wells for successful pump off control application and a low cost, reliable means for the detection of pump off. Case studies will show how pump off control has been successfully applied to marginal (and other) producing wells to lower lifting costs, enhance pumping system efficiency and increase profitability.