Abstract: A multipurpose pig for treating the interior of pipes or for conveying material through a pipeline constructed of a main body portion having a length approximately one and one-half times its diameter with one end of the body portion being cup-shaped and including flanges extending outwardly therefrom. The other end of the main body includes a hub with a central opening therethrough for securing a plurality of cutting blade elements to the hub for cleaning the interior of pipelines with the passage of the multipurpose pig therethrough. The main body portion further includes a plurality of sealing elements extending from the hub to the cup-shaped flange with the diameter of the plurality of sealing elements and said flange being approximately equal.

Abstract: In order to increase the productivity of oil and gas wells, hydrochloric acid and phosphoric acid are pumped into the well. Thereafter, aqueous ammonia is forced into the bottom of the well by nitrogen under pressure. This produces a violent exothermic reaction in the formation around the bottom of the well which emulsifies the paraffin and disintegrates the limestone, so as to open the formation by forming large passages and cavities over large areas and distances, permitting the oil or gas to flow freely through the formation to the well bore.