The American Petroleum Institute (API) has chosen standards for certain configurations of rod drawn, downhole pumps. These standards ensure that component parts for these pumps are interchangeable between different manufacturers by setting standards for thread sizes, part dimensions and minimum quality standards. Harbison-Fischer pump parts match API standards for size and dimension and exceed the quality levels set forth by API.

 

Harbison-Fischer API style sucker rod pumps are available in a wide variety of materials, coatings and wear resistant treatments for corrosion, abrasion and strength requirements. An insert style pump is installed on the sucker rods, inside the tubing and can be retrieved by pulling the sucker rods to the surface. Therefore, an insert pump should always be chosen if the expected fluid production can be delivered by the insert pump size available for the tubing size. The tubing pump should be selected if greater fluid capacity is needed than can be delivered by an insert pump. The tubing pump barrel is part of the tubing string, necessitating the pulling of tubing to service the tubing pump barrel.
 
 

Bottom Hold-Down Insert Pumps, Thin Wall (RWB) and Heavy Wall (RHB)

The Harbison-Fischer API style Bottom Hold-down Insert Pump is the most popular of the four basic API pumps. This is due to its ruggedness and relative simplicity.

  

Top Hold-Down Insert Pumps, Thin Wall (RWA) and Heavy Wall (RHA)

The Harbison-Fischer API style Top Hold-Down Pump is popular in areas that produce sand or other particulates that tend to accumulate over the hold-down of a Bottom Hold-Down.

  
         
 

Traveling Barrel Insert Pumps, Thin Wall (RWT) and Heavy Wall (RHT)

The Harbison-Fischer API style Traveling Barrel Pump is useful in pumping conditions that are characterized by relatively heavy particulate production.

  

API Tubing Pumps (TH)

The Harbison-Fischer Tubing Pump is the most rugged of the four API pumps due to its heavy wall construction. It should be chosen when greater production is needed than can be delivered by an insert pump.