These pumps have a simple design operating principle. The engine is activated by power fluid controlled by the engine valve. The engine piston is fitted with a rod, which connects to the pump piston. This positive displacement configuration allows the pump to operate at low bottomhole pressures. Weatherford Kobe® Type A Pump

All fluid passages are enclosed within the outer tubes of this pump design, making it applicable to either the Fixed Insert or “Free Pump” installation. The design requires only a single external seal when run as a “Free Pump” into the downhole bottomhole assembly. These pumps are available in 2 through 4-inch tubing sizes and may be fitted with single or double pump ends.

Weatherford Kobe® Type B Pump

The Kobe Type B Pump is designed as a “Free Pump” to utilize the bottomhole assembly for fluid passages which are external to the pump. This permits use of larger pump and engine pistons to gain greater displacement capacity. These passages are established between the pump and the bottomhole assembly by means of multiple external seals on the pump. This pump is available as a “Free Pump” for 2, 2-1/2 and 3-inch tubing sizes and may be fitted with single or double pump ends.

Weatherford Kobe® Type D Pump

The Kobe Type D Pump is an extension of the Kobe Type B by the addition of a second engine piston and cylinder for increased engine displacement. Available pump ends are the same as for the Type B. This design extends the depth of lift capability or permits reduced operating pressure. This pump is available as a “Free Pump” for 2, 2-1/2 and 3-inch tubing sizes and may be fitted with single or double pump ends.

Weatherford Oilmaster F & V Series and Model 220 Pumps

The Weatherford Oilmaster F-Series downhole pumps offer a longer stroke length for low-to-mid volume production. They will fit in the standard hydraulic bottomhole assembly (2” pump pitch length of 79”, 2-1/2” pump pitch length of 105”) which allows interchangeability with other manufacturers.

The Model 220 Series pumps were designed for higher volumes and deeper depths. They require bottomhole assemblies designed to accept the higher volume. All 220 Series pumps are single-acting pumps, with larger diameter seats and poppet design valves made of high alloy metal to allow larger flow passages and deeper pumping depths.