The American Petroleum Institute (API) method for rod pumping system design became available in the mid 1960's. Even after 30 years, questions still arise concerning its utility. This paper examines basic premises of the API method and how these affect accuracy and applicability. A comparison is made with wave equation techniques which are also widely used. It is concluded that the API method is useful and can be applied with confidence as long as underlying assumptions are not violated.

You can access this article if you purchase or spend a download.