Mono Introduces New API Progressing Cavity Pumps

Contributed by: PumpScout Staff

Mono, a subsidiary of National Oilwell Varco (NOV), has supplied progressing cavity pumps to the oil and gas industry since 1935. The global company excels in providing technology for the harsh operating conditions typical of applications in this market, which requires steady flow and low shear transfer of solids-laden multiphase fluids.

The company’s new API 676 EZstrip pumps are ideal for oil, gas and mud handling duties in drilling, exploration, production, processing and separation operations. The pumps offer a practical, reliable, and proven solution to prevent emulsification and resist the effects of abrasion without gas locking.


The new pumps are designed with a long-coupled, full-size base frame that includes a drip tray in accordance with the API 676 Third edition and a mechanical seal to API 682 Category 1. The pumps also feature Mono’s innovative EZstrip technology. This allows users to disassemble and maintain the pumps in-situ (in position), reducing the time needed to replace a rotor, stator, coupling rod and drive train by up to 95%.

Numerous options allow these pumps to be fairly versatile and customized to suit the application. Materials of construction range from mild and stainless steel through to traceable and NACE-certified duplex steels; they are bi-directional and can be mounted horizontally or vertically; and the positive seal formed by the interference fit between rotor and stator makes them ideal for low net positive suction head applications.

Emulsification of oil and water mixtures such as reject oil or separator feeds is prevented through the gentle action of these pumps. Meanwhile, low velocity of the transferred fluid and low rubbing velocity of the metal rotor against the stator ensures low rates of abrasion and wear. Rotors with specialist coatings can provide additional wear and corrosion protection.

The API 676 EZstrip pumps have optional dry run protection, ATEX, and API 682 seal systems. Mono also offers a range of artificial lift technologies, including electric well head drives, plunger lift and API-certified sucker rod pumps, designed for use in enhanced oil recovery and de-liquification operations.


Source: NOV Mono

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