Core advantages

Nearly zero pulsation output:

Compared to traditional three-cylinder pumps, the pressure pulsation is reduced by up to 92%, providing unprecedented clarity for MWD tools and significantly extending the life of downstream high-pressure manifold.

Excellence in power density:

The pump's overall weight is reduced by 30-40% and its footprint is reduced by 45%, providing unmatched advantages for upgrades on space-constrained offshore platforms and rigs.

Uniquely flexible operation:

Unlike later fixed cylinder liner models, the Old FE Version retains the capability to replace cylinder liners, enabling operators to flexibly switch between ultra-high pressure and high displacement according to well section requirements.

Power side: A masterpiece of engineering for lasting reliability

The power end of the HEX 240 is the source of all its revolutionary advantages. It abandons the traditional crankshaft and connecting rod structure and adopts a more advanced and smoother power transmission mechanism, aiming to achieve hundreds of thousands of hours of trouble-free operation.

The patented asymmetric cam, the core of the power unit, is a single-lift asymmetric cam forged from special cast steel and precision-machined with specialized heat treatment. Its unique profile precisely coordinates the movements of six pistons, eliminating pressure pulsations at the mechanical source to achieve smooth fluid output.

Robust Bearing System: The entire system is supported by world-class FAG and INA bearings. Large tapered roller thrust bearings bear the primary axial forces, while cylindrical roller bearings provide radial guidance. The pinion shaft is supported by two cylindrical roller bearings and a four-point contact ball bearing, ensuring efficient and stable power transmission.

Comprehensive lubrication system: All rolling bearings are lubricated by forced oil circulation system, while the linear guide is lubricated by splash, ensuring optimal cooling and wear protection under any working conditions.

Technical specifications and performance parameters

Table 1: Technical Specifications of NOI HEX 240

parameter	specifications
model	NOI HEX 240 (Old Hydraulic End)
Total installed capacity	2,400 HP (2 x 1,200 HP AC motors)
Maximum continuous input power	950 kW (approx. 1,275 HP)
maximum working pressure	7,500 psi (517 bar)
maximum pump discharge	Approximately 1,030 GPM (3,900 LPM)
maximum speed	212 RPM
stroke length	11.8 inches (300 mm)
Cylinder liner size (old version)	4.0 inch / 4.5 inch (replaceable)
External dimensions (length x width x height)	4.1 m x 3.0 m x 2.8 m
lube oil system	Forced oil circulation and splash lubrication

Note: Performance varies depending on the cylinder liner size selected. A smaller 4-inch liner provides higher pressure, while a 4.5-inch liner delivers greater displacement.

High-quality accessories: Ensure optimal performance and minimal operating costs

We understand that equipment reliability depends on the quality of every component. That's why we provide a full range of high-quality replacement parts for the HEX 240 legacy hydraulic end that meet or exceed API 7K standards, ensuring your equipment always performs at its best.

Table 2: Key vulnerable parts materials and processes

component	Materials and Process Options	Key advantages
Cylinder Liner	High-chromium bimetallic: Forged steel casing with a centrifugal-cast inner sleeve of high chromium (26-28% Cr), hardness HRC 60-69. Ceramic: Forged steel casing with a zirconia (Zirconia) inner sleeve, hardness>HRC 92.	High-chromium cylinder liners deliver exceptional cost-effectiveness and a service life exceeding 800 hours under extreme operating conditions. Ceramic liners, meanwhile, provide superior wear and corrosion resistance, with a service life of over 4000 hours, making them the ideal choice for sand-rich and corrosive slurry environments.
Pistons	Piston core: Forged from high-strength alloys such as 42CrMo or 45# steel and heat-treated. Piston rubber: Available in polyurethane (PU) and nitrile rubber (NBR) options, featuring an adhesive design that ensures excellent sealing and resistance to extrusion under high pressure.	Polyurethane pistons are ideal for oil-based and synthetic-based slurries in high-temperature applications (up to 220°F / 104°C), while nitrile rubber pistons provide a cost-effective solution for water-based slurries.
Valve Assembly	Valve body and seat: Forged as a single piece from high-quality alloy steels such as 40CrNiMo or 20CrMnTi. Heat treatment: Through deep carburizing and quenching processes, achieving surface hardness exceeding HRC 60 while maintaining core toughness. Precision machining: After heat treatment, the sealing surfaces undergo precision grinding to ensure perfect geometric alignment.	This "heat treatment first, precision machining" process fundamentally eliminates the small gap caused by deformation of heat treatment, effectively prevents high pressure "erosion", and greatly extends the service life of the valve assembly and the entire hydraulic end.

application area

With its revolutionary design and the unique flexibility of the old hydraulic end, the NOI HEX 240 excels in a variety of high-end drilling applications:

Deepwater and ultra-deepwater drilling: Its excellent power density and reliability make it an ideal choice for valuable deepwater drilling platforms and drilling ships in space.

High-precision geological steering drilling: The nearly pulsless fluid flow provides extremely clear signals for MWD/LWD tools, which is the key to achieving complex wellbore trajectory and reservoir evaluation maximization.

Onshore drilling for flexible conditions: For operations that require frequent switching between high pressure cementing/fracturing and large displacement hole cleaning, the replaceable sleeve design of the older hydraulic end provides valuable flexibility and reduces non-productive time.