Power end-indestructible mechanical heart
Strong welded steel frame: unlike traditional cast iron frame, WH-440 power frame is welded with high-strength low-alloy steel and heat treated after welding.
One-piece forged crankshaft: we reject the multi-segment bolt-on design which is prone to stress concentration and use a one-piece forged and precision machined crankshaft made of top alloy steel (modified 4340) .
Precision Herringbone Gear: the core of the drive system is a forged alloy steel gear designed with herringbone (double helical) teeth. This design makes the power transmission more smooth and quieter, effectively eliminates the impact load, and its manufacturing accuracy meets or even exceeds the AGMA level 11 standard.
Full roller bearing design: high quality anti-wear roller bearings are used throughout the power end, instead of the traditional sliding bearing, to achieve the lowest friction and the longest service life.
Redundant lubrication system: to fundamentally solve the problem of insufficient lubrication, WH-440 is equipped with a combination of forced lubrication and splash lubrication system. Some high-end configurations provide external oil pumps driven by independent motors, triple redundant protection ensures adequate lubrication of all critical components at any speed.
Hydraulic end-control of ultimate pressure
L-shaped forged alloy steel module: we adopt the industry-recognized L-shaped hydraulic end module design, which is made of top-grade forged alloy steel, such as 35CRMO or 40CrMnMo. The forging process combined with rigorous heat treatment and non-destructive testing (NDT) ensures that the module can reliably withstand operating pressures up to 5,000 PSI and even 7,500 PSI with exceptional fatigue and corrosion resistance.
API standard Valve Assembly: WH-440 uses the Industry Standard API # 4 valve assembly to ensure the versatility of spare parts. The valve body and seat are forged from high quality alloy steels such as AISI 4119 or 20CrMnTi and subjected to deep carburizing heat treatment with surface hardness up to HRC ≥60, providing ultimate wear resistance while retaining the toughness of the core to resist impact.
High performance fittings and material technology
We offer a range of wearing parts made from top-of-the-line materials and advanced technology that allow you to customize pump performance for specific operating conditions to maximize running time and reduce maintenance costs.
|
Accessories |
Materials and processes |
Core Strengths |
|
Liners |
High chromium bimetal: forged steel case + centrifugally cast high chromium (CR > 27%) lining, inner wall hardness HRC 60-69. Zirconia ceramic: forged steel shell + zirconia (Zro3) ceramic lining, inner wall hardness HRC > 90. |
High chromium: excellent wear resistance, cost-effective, suitable for most drilling conditions, life > 800 hours. Ceramics: the ultimate wear and corrosion resistance, ultra-long life (> 4000 hours) , significantly reducing piston wear, is the best choice for extreme conditions. |
|
Pistons |
Piston Core: 45 # steel or 40CR forged, heat treated. Piston rubber: special formula of polyurethane or nitrile rubber (NBR) , using adhesive design. |
Oil resistance, heat resistance, wear resistance, extrusion resistance. Durable and reliable seal in oil-based and water-based muds with maximum operating temperatures up to 280 °F. |
|
Piston Rods |
High strength alloy steel (e. g. 42CrMo) , forged, heat treated and precision ground. Hard chromium plating is optional to enhance corrosion resistance. |
Extremely high tensile strength and fatigue resistance ensure stable power transfer under high pressure. |
Core technical specifications
|
Parameters |
Specifications |
|
Rated input power |
440hp (328KW) |
|
Maximum rated stroke |
320SPM (flush/min) |
|
Stroke length |
6 inches |
|
Gear ratio |
4.578:1 |
|
Specification of Valve Chamber |
API # 4 |
|
Suction line interface |
6"150 # flange |
|
Discharge pipe connection |
3"900 # flange |
|
Pump net weight (approx.) |
9,840 lbs |
Lewco WH-440 performance parameter table
|
Cylinder liner dimensions in inches |
Rated pressure (psi) |
Pump Speed (SPM) |
Input Power (HP) |
Displacement (GPM) |
|
6 |
1,027 |
320 |
440 |
661 |
|
270 |
380 |
551 |
||
|
220 |
320 |
441 |
||
|
5-1/2 |
1,222 |
320 |
440 |
555 |
|
270 |
380 |
463 |
||
|
220 |
320 |
370 |
||
|
5 |
1,479 |
320 |
440 |
459 |
|
270 |
380 |
382 |
||
|
220 |
320 |
306 |
||
|
4-1/2 |
1,710 |
320 |
440 |
397 |
|
270 |
380 |
335 |
||
|
220 |
320 |
273 |
||
|
4 |
2,169 |
320 |
440 |
313 |
|
270 |
380 |
264 |
||
|
220 |
320 |
215 |
||
|
3-1/2 |
2,816 |
320 |
440 |
240 |
|
270 |
380 |
202 |
||
|
220 |
320 |
165 |
Source:. Displacement is based on 100% volumetric efficiency and 90% mechanical efficiency.
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