OILWELL HD-1400-PT Mud Pump

 

 

The following table details the core performance parameters of the HD-1400-PT under different operating conditions.

Cylinder liner dimensions (in.)	Maximum pressure (PSI)	Displacement per rpm (gallons)	Displacement at 120spm (gallons per minute)
4	5000	1.96	235
41/2	5000	2.48	298
5	5000	3.06	367
51/4	5000	3.37	404
51/2	4714	3.70	444
53/4	4313	4.05	486
6	3960	4.41	529
61/4	3650	4.78	574
61/2	3380	5.17	620
63/4	3130	5.58	670
7	2910	6.00	720
71/4	2713	6.43	772
71/2	2535	6.89	827

Rated input power: 1400HP (1044KW)

 

Maximum Stroke: 120SPM

Stroke length: 12 inches (304.8 mm)

Note: Performance data is based on a volumetric efficiency of 100% and a mechanical efficiency of 90% . The calculated value of the maximum pressure (max-p.s.i.) shall not exceed the maximum rated pressure at the hydraulic end and the maximum load on the connecting rod bearing as specified by the original equipment manufacturer.

 

Power End: The Indestructible Foundation of strength

Welded steel power rack

 

The base of the power end is its fully welded steel frame, which has extremely high flexural and torsional stiffness.

Drive system-gears and crankshaft

 

Power is transmitted from the input shaft to the crosshead by the transmission system. The system uses a Herringbone or Single Helical Gear.

The crankshaft serves as the core of the power end and is made of high strength forged alloy steel (4340) .

Bearing and connection system

The rotating parts of the entire power end are supported by heavy duty roller bearings, including pinion shafts, crankshafts, connecting rods, and crosshead pins. Roller bearings are designed to withstand the high radial and axial loads generated by reciprocating pumps, ensuring low friction and long service life.

The crosshead guide plate is made of replaceable bronze and can be adjusted by gaskets. As an excellent bearing material, bronze provides excellent wear resistance, while the adjustable design allows for compensation of wear throughout the life cycle of the equipment, maintaining the precise alignment of the crosshead at all times.

Lubrication system

A comprehensive lubrication system is the ultimate guarantee for the reliability of the power end. HD-1400-PT uses a dual lubrication system that combines splash lubrication with forced pressure lubrication driven by a separate oil pump. The system is equipped with full flow filter to ensure that the clean, cooling oil can be continuously delivered to every key moving parts. This not only effectively takes away the heat generated by friction, but also prevents the wear caused by insufficient lubrication, which is the lifeline for the long-term operation of the power end.

 

 

Modular design

The hydraulic end adopts the design of forging steel hydraulic cylinder (module) which is split and can be replaced independently. Compared with the integral hydraulic end, the advantage of this design lies in the economy and convenience of maintenance. If a module is damaged due to corrosion or fatigue, only the module needs to be replaced without replacing the entire expensive hydraulic end assembly, greatly reducing maintenance costs and downtime.

Advanced Materials Science

Hydraulic end modules are made of high quality high strength forged alloy steel, AISI 4135 or 35CRMO. The choice of these materials is no accident. The chromium (CR) and molybdenum (Mo) elements they contain endow the steel with excellent hardenability, toughness and wear resistance, which are essential to withstand the continuous flushing and corrosion of drilling fluids under high pressure.

Key manufacturing processes

Excellent performance comes from the precision of the manufacturing process. The HD-1400-PT hydraulic end is manufactured with a three-layer defense system to maximize its fatigue life and safety.

Forging process: all modules are forged rather than cast. Forging refines and orients the grains within the metal by high pressure, eliminating pores and inclusions that may exist in the casting, resulting in substantially stronger, more fatigue-resistant parts.

Heat Treatment: the forged module is subjected to a tightly controlled heat treatment (quenching and tempering) . This step aims to optimize the microstructure of the material, maintain the necessary toughness to prevent brittle fracture while ensuring sufficient hardness to resist wear, and achieve the best balance between strength and toughness.

Autofrettage: this is the most advanced process for extending the life of the hydraulic end. In autofrettage, the module is placed in an ultra-high pressure environment that far exceeds its operating pressure. This one-time overpressure loading will generate permanent residual compressive stress on the surface of the inner hole of the module. In the actual operation of the pump, the pulse tensile stress generated by the drilling fluid needs to overcome the preset compressive stress first, and then the material itself can be stretched. This greatly reduces the effective stress amplitude in each pressure cycle, thereby doubling the anti-fatigue life of the hydraulic end, which is the core guarantee for the safety of high-pressure applications.

API 7K compliance and quality assurance

The entire hydraulic end assembly, from modules to wearing parts, is manufactured and tested to meet or exceed the stringent requirements of API 7K. This includes non-destructive testing (NDT) during the production process, such as ultrasonic and magnetic particle testing, to ensure the internal integrity of the material and eliminate any potential defects.

 

 

The correct choice of components: to extend life, reduce costs

Cylinder liner-the heart of performance

Cylinder liner is the cavity of piston reciprocating motion, the quality of its inner wall directly affects the life of piston and itself.

High chromium cylinder liner: this is a standard bimetallic cylinder liner consisting of a high strength forged steel outer liner and a high chromium cast iron inner liner. The outer sleeve provides strength, while the inner sleeve offers high hardness (HRC 62-69) and abrasion resistance, making it a reliable and cost-effective choice for many standard applications, rated at pressures over 5000 PSI.

Zirconia ceramic cylinder liners: this is an advanced option designed for the most demanding operating conditions. Zirconia ceramics have unparalleled advantages: they have extremely high hardness (HRC 92-94) , excellent wear and corrosion resistance, and can be honed to an extremely fine surface finish (4-8 RMS) .

Pistons and valves

 

Pistons: offers a variety of piston options, such as polyurethane pistons and replaceable rubber pistons. Polyurethanes perform better in oil-based muds and under high-pressure conditions, while replaceable rubbers have cost advantages in water-based mud applications.

Valves and seats: valves and seats in full open, mesh and other designs are made of high quality forged alloy steel and heat treated for durability. All valves are API compliant ensuring complete interchangeability.

Guide for the selection of high-performance wearing parts

Drilling conditions/mud type	Recommended cylinder liners	Recommended Pistons	Description of performance advantages
Water-based mud, low solid phase	High chromium cylinder liner	Replaceable rubber piston	Cost-effective standard configuration to meet conventional drilling requirements.
Oil/synthetic based mud, high temperature	Zirconia ceramic cylinder liner	Polyurethane pistons	Polyurethane has excellent tolerance to oil-based muds; zirconia cylinder liners provide the best wear resistance and piston protection.
High solid phase, strong abrasion resistance	Zirconia ceramic cylinder liner	Polyurethane pistons	The extremely high hardness of zirconia can resist the erosion of abrasive particles and significantly prolong the maintenance period, which is the best choice to reduce TCO.

List of key wearing parts and spare parts

We offer the HD-1400-PT with a full range of perishables and spare parts to ensure that your equipment remains at its best. Key spare parts include (but are not limited to) :

Hydraulic end module (suction/discharge)

Cylinder liner (high chromium/zirconia) and cylinder liner seal

Piston (polyurethane/rubber) and piston rod

Valve Assembly (body, seat, rubber, spring)

Power and hydraulic end studs, nuts and gaskets

Crossheads, crosshead pins and guides

Connecting rods, pinion shafts and crankshaft bearings

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