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Power End: the cornerstone of forging strength and precision engineering

Crankshaft: the core of the power end is a fully balanced one-piece crankshaft forged from high-strength alloy steel, particularly 42CrMo (equivalent to AISI 4140) or ANSI 4340 grade.

Gear and pinion shafts: main gear (Spur) and pinion shafts are precision machined from integrally hardened alloy steel and are of herringbone design. This design ensures the maximum contact area of the tooth surface, and realizes smooth and low-noise power transmission. At the same time, it has extremely high torque bearing capacity and structural rigidity, which ensures the smooth transmission of power from the driving end to the hydraulic end.

Structural integrity and stability

Frame: the entire pump is mounted on a sturdy, welded steel frame. After the completion of all welding processes, the frame will undergo strict stress relief heat treatment to prevent structural deformation, providing an extremely stable operating platform for all moving parts.

Crosshead Assembly: the crosshead is made of high quality, wear resistant ductile iron or ASTM A48-83 Meehanite cast iron cast in one piece. It slides on replaceable manganese bronze, the guide plate selected for its excellent low friction properties, minimizing heat generation and wear. The taper design of the crosshead pin ensures a firm and accurate connection to the connecting rod.

Bearing system: two double row tapered roller main bearings, two self aligning roller pinion shaft bearings, three double row needle roller crosshead bearings, and three cylindrical roller bearings for crankshaft and connecting rod connections. This strategy of multi-bearing cooperative work can effectively disperse the load, improve the operation stability, and maximize the service life of the bearing.

Lubrication system

A set of perfect lubricating system is the guarantee of long-life operation of the power end. Our system integrates pressure lubrication and splash lubrication to ensure that all moving parts are adequately lubricated. An external, motor-driven pump system with high efficiency filters provides a continuous supply of clean EP gear oil to critical bearings and gears. Crankcase oil capacity of up to 175 U. S. gallons (about 662 liters) , to provide sufficient protection for long-term stable operation.

Hydraulic end: crafted for maximum uptime and ease of maintenance

Advantages of l-type modular design

Maintain economy and convenience: modularity is our core value proposition. Under the flushing of drilling fluid, the suction valve module typically wears out the fastest. With our design, when wear occurs, the user only needs to replace the individual suction valve modules without replacing the entire expensive hydraulic end assembly, greatly reducing maintenance costs and downtime. It has also been proven that replacing valves and seats is faster and safer than operating on one-piece modules.

Superior stress distribution: The l-shaped design allows the use of more metal materials and more optimized geometry to support internal pressures up to 7500 PSI. This effectively mitigates the stress concentration at critical crossholes and significantly reduces the risk of cracking-a known weakness of conventional monolithic modules.

Materials Science and precision manufacturing

Forged alloy steel construction: each module is forged from high strength quality alloy steel, AISI 4130 or AISI 4135. The forging process ensures a fine internal grain structure, eliminates internal defects, and provides the toughness necessary for the module to withstand high-pressure cyclic loading.

Advanced heat treatment process: after forging, the module will go through a precisely controlled heat treatment program. This is not a simple hardening process, but rather a multi-stage process designed to optimize the combined mechanical properties of the material-giving the inner surface high wear resistance while maintaining the toughness of the core material, to absorb impact and prevent brittle fracture.

Precision Machining: all internal cavities and joint surfaces are machined on a CNC (numerical control) machining center, strictly following OEM tolerance standards to ensure perfect interchangeability and sealing performance.

Quality Assurance and verification

100% interchangeability guaranteed: we solemnly promise that our modules and all their components are 100% interchangeable with OEM components, and their performance meets or exceeds the API 7K standard.

Strict non-destructive testing (NDT) : each forging module must pass a series of NDT before leaving the factory to ensure its integrity. This includes ultrasonic testing, based on the ASTM A388 standard, to detect any subsurface defects, and dye penetrant testing to identify surface microcracks.

Hydrostatic testing: in accordance with API 7K guidelines, each hydraulic end assembly is hydrostatically tested at 11,250 PSI (i.e. 1.5 times the maximum operating pressure) . This test verifies the structural integrity of the module and the performance of all seals. Each unit is shipped with an official hydrostatic test certificate.

Material traceability: we maintain complete material traceability throughout the manufacturing process. All key alloy components are accompanied, by a material test report (MTR) , which traces the finished product back to the original steel plant smelting batch number, ensuring transparency and reliability of the material source.

Advanced Options: Autofrettage handles the hydraulic end

For the most demanding drilling applications, we offer premium hydraulic end modules with Autofrettage processing.

Autofrettage: this is a specialized high pressure process. During this process, an extremely high internal pressure is applied to the module, which is sufficient to cause plastic deformation in the bore area of the module. When the pressure is released, the outer elastic region will rebound and compress the plastically deformed inner region, resulting in a permanent and beneficial residual compressive stress on the inner hole surface.

Advantage of autofrettage: this layer of residual compressive stress can actively offset the high compressive tensile stress generated by the pump during the working stroke. As a result, the fatigue life of the module is significantly improved, so that it has a strong ability to resist crack initiation and propagation in high stress areas such as cross holes. This technology enables us to provide up to

In-depth analysis of high-performance fragile parts

The performance of wearing parts directly affects the maintenance cycle and operating costs of mud pumps. We provide a wide range of solutions based on different application requirements and full life cycle cost considerations to enable customers to make the most economical and efficient choice according to the actual working conditions.

Cylinder liner technology: Choices driven by application and total cost of ownership

High chromium bimetallic cylinder liners:

Construction: a tough, forged housing of high-strength 45 # steel (tensile strength > 900,000 psi) is tightly bonded to an embedded, high-chromium cast iron (CR ≥27%) wear-resistant casing.

Manufacturing Process: the inner sleeve is made by centrifugal casting process, forming a dense and uniform microstructure under the action of centrifugal force with high G value (usually 40-150g) , without porosity defects. Subsequently, the casing is subjected to quenching heat treatment so that its surface hardness reaches
HRC 62-69, with excellent wear resistance. Finally, the outer and inner sleeves are combined into a solid bimetallic component by a high-pressure fitting process.

Performance: in the standard drilling conditions, its service life of more than 800 hours, to achieve a perfect balance between performance and cost. We offer industry-wide Grayloy specifications.

Zirconia ceramic cylinder liners: the ultimate solution for extreme wear and extended service life.

Construction: Inside the forged steel housing is fitted an integral sleeve made of advanced, zirconia (ZRO3) ceramic composite, usually using yttria (Y2O3) as a partial stabilizer.

Manufacturing Process: ceramic sleeve by ultra-fine ceramic powder through, isostatic pressing, molding process, the process of applying uniform pressure, the formation of high-density"Green". The Green Compacts are subsequently sintered at high temperatures to achieve complete densification and mirror-like finish (4-8 RMS) .

Properties: compared with high chromium or alumina ceramics, zirconia has higher hardness (HRC 90 +) , excellent impact toughness and corrosion resistance. This allows for a service life in excess of 4,000 to 8,000 hours, thereby significantly reducing the frequency of cylinder liner changes and minimizing downtime.

Piston and valve assembly: the core of sealing and fluid control

Piston:

Construction: our pistons are made of a high-strength core forged from 40CR or 45 # steel, heat-treated and phosphated to improve hardness and corrosion resistance.

Sealing material: the sealing element is made of high performance, adhesive polyurethane and elastomer. We offer a variety of formulations, including dual-hardness designs (such as"Green Duo", "Blue Lightning") and high-temperature resistant polyurethanes to resist wear, extrusion, and chemical erosion of water-based, oil-based, and synthetic-based drilling fluids.

Valves and seats (API # 8) :

Material and manufacture: body and seat forged from AISI 8620(20CrNiMo) nickel-chromium-molybdenum alloy steel. The material was selected for its excellent core toughness and good responsiveness to surface hardening.

Carburizing heat treatment: this is the most critical manufacturing process. The forged parts are gas carburized at high temperatures (~ 925-930 °C for 4-12 H) , allowing carbon atoms to infiltrate the surface to form an effective hardened layer of ~ 1.2-2.0 mm. Subsequent quenching and tempering results in an extremely hard and wear-resistant surface layer (HRC 58-62) and a tough core. This dual performance structure is very important to resist the abrasion of drilling mud and bear the high frequency impact load in the pump.

Piston rod:

Material and fabrication: piston rod made of high strength 42CrMo alloy steel, forged and then quenched and tempered for superior mechanical properties and fatigue resistance 7. Its surface is treated with zinc, nickel or hard chromium plating to enhance corrosion and wear resistance.

Performance and specifications

This section provides the core data that engineers and purchasing managers need for planning and integration.

Table 1:14P220 mud pump-core technical specifications

Parameters	Specifications
Rated input power	2200hp (1640KW)
Rated pump speed	105SPM
Stroke length	14in (355.6 mm)
Gear ratio	3.969:1
Maximum work stress	7500 PSI (51.7 MPa)
Valve Chamber API number	Mod. 8
Suction line flanges	10"ASA-150 lb
Discharge line flange	5"API-10,000 lb
Overall weight (excluding pulleys)	About 86,000 lbs (39,007 kg)
Dimensions (length x width x height)	218.25"X 125.75" x 84.25"(5544 x 3194 x 2139mm)

Sources of data:

Table 2: performance matrix-cylinder liner dimensions vs. Pressure and flow

Cylinder liner dimensions (in.)	Maximum discharge pressure (PSI)	Flow rate at rated pump speed (105SPM)(GPM)
5	7500	375
51⁄2	7475	454
6	6285	540
61⁄2	5360	633
7	4615	735
71⁄2	4025	843
8	3535	960
9	2795	1215