DRILLMEC 8T800 Pump

Table 1: DRILLMEC 8T800 key specifications

The following table outlines the core technical parameters of the DRILLMEC 8T800 mud pump and provides a comprehensive overview of its performance.

Table 2: Drillmec 8T800 performance parameters (flow vs. pressure)

The table lists in detail the theoretical pump displacement and the corresponding maximum working pressure under different cylinder sizes and speeds. This data is the key basis for the design of drilling operations, based on 100% volumetric efficiency and 90% mechanical efficiency.

Rack and pinion

Frame structure: power end frame welded with high-quality steel plate, rather than the traditional casting structure.

Gearing: The drive train is designed with precision machined Herringbone gears. Compared with ordinary helical gears, herringbone gears can naturally offset the axial thrust during meshing without additional thrust bearings, thus reducing the bearing load and making power transmission smoother, more efficient and less noisy.

Crankshaft and bearing configuration

Crankshaft: as the core component of the power end, the crankshaft is forged or cast in one piece of high strength alloy steel (modified 4340 or 42CrMo) , which is subjected to strict heat treatment and dynamic balance test, to ensure excellent fatigue strength and extremely low operating vibration.

Bearing Configuration: to cope with extreme loads, heavy duty double row spherical roller bearings are used for the crankshaft main bearings, while the connecting rod and crosshead are mounted on high capacity roller bearings.

Crosshead and lubrication system

Crosshead Assembly: the crosshead body is made of high-strength ductile iron or cast steel, and its sliding guide plate is made of wear-resistant manganese bronze material. This combination provides extremely low friction coefficient and excellent wear resistance, it effectively prevents wear and sticking even when the lubrication conditions change.

Lubrication system: the use of forced lubrication and splash lubrication combined with double lubrication.

Modular design

Structural advantages: the hydraulic end consists of three independent, interchangeable l-shaped modules. This design offers significant maintenance advantages over the Monoblock hydraulic end. If a module is damaged due to wear or fatigue, field personnel only need to replace the module without replacing the entire expensive hydraulic end assembly, thereby significantly reducing maintenance costs and downtime (NPT) .

Material and process: each module is made of high quality alloy steel (35CRMO or AISI 8620) by precision forging. The forging process ensures the density and uniformity of the grain structure in the material, and eliminates the defects such as porosity and porosity that may occur in casting. After forging, the module is subjected to rigorous heat treatment and internal hardening to fully comply with API 7K standards. It has extremely high strength and fatigue resistance and can withstand cyclic pressures up to 5,000 PSI.

Valve system

Valve Assembly: 8T800 pump with API # 6 full open valve assembly, which is 800-1000HP standard pump configuration, to ensure maximum flow area and minimum erosion. Both body and seat are forged from top-grade carburizing alloy steel (20CrMnTi or AISI 8620) .

Manufacturing Process: the body and seat are multi-pass precision machined and then heat treated by carburizing and quenching. This advanced process forms an extremely hard wear-resistant layer on the surface -LRB-hardness reacHRC HRC ≥60) , while maintaining good toughness in the core, making it both resistant to erosion and wear by high-pressure fluids, it can also withstand the huge impact load when the valve is opened or closed.

Valve plug-in and valve cover: valve plug-in is made of high-performance wear-resistant polyurethane material, which is precisely matched with the valve seat to provide reliable sealing and can withstand chemical corrosion and abrasive wear of various drilling fluids. The valve cover adopts threaded locking ring structure, which is convenient for on-site quick and safe disassembly, assembly and replacement of valve wearing parts.

P-Quip quick-change system (optional) : for customers looking for maximum efficiency, we offer an optional P-Quip quick-change system. Through the spring mechanism driven by hydraulic pressure, the system realizes the quick and hammerless disassembly and assembly of the valve cover, cylinder sleeve and piston rod, and the replacement time can be shortened by more than 75% , it can significantly reduce the downtime and greatly improve the safety of the operation.

Liners

High chromium bimetallic cylinder liner: the shell is made of high strength forged steel (45 # steel) to withstand high pressure; the inner liner is made of high chromium (chromium content > 26%) cast iron by centrifugal casting, and the hardness of the inner wall is as high as HRC ≥60-65, excellent wear and corrosion resistance. The inner and outer layers are tightly bonded with interference fit, withstanding pressures up to 7,500 PSI for a normal service life of more than 800 hours.

Zirconia ceramic cylinder liner: the inner liner is made of high purity zirconia ceramic material, which is treated by advanced phase transformation toughening technology. The hardness is extremely high (HRC ≥90) , and the wear resistance is several times that of high chromium cylinder liner, the service life can reach 2000-4000 hours. The inner wall of the ceramic is extremely smooth, which can significantly reduce friction with the piston, prolong the life of the piston and reduce the water used for flushing and lubrication.

Piston and piston rod

Piston assembly: using one-piece vulcanized bonding structure, high-performance polyurethane (PU) or nitrile rubber (NBR) directly bonded to the forged steel (45 # or 40CR steel) made of the piston core. This design ensures that the rubber body will not fall off or be extruded under high pressure, providing a reliable seal and ultra-long service life up to 250 °F (120 °C) .

Piston rod/intermediate rod: forged from high strength alloy steel (42CrMo/SAE 4140) and quenched and tempered for optimum combined mechanical properties. The surface of the rod body is treated by precision grinding and hard chromium plating, the surface is smooth and extremely wear-resistant, which ensures the close cooperation with the packing seal and effectively prevents leakage.

Valve assembly, seals and other accessories

Valve Assembly (API # 6) : Body and seat forged from high quality alloy steel (20CrMnTi/AISI 8620) , carburized and hardened to HRC 60 + . Wear resistant polyurethane inserts ensure reliable seal and durability at 5,000 PSI operating pressure.

Seals and gaskets: all seals are made of high-quality NBR, HNBR or PU materials to adapt to different drilling fluid chemical environment and working temperature.

Related accessories: we also provide a full set of high-quality accessories, including pulse buffer, safety valve, cylinder liner flushing system, etc. , to ensure that your mud pump system is complete, efficient and safe operation.

Table 3: DRILLMEC 8T800 comprehensive spare parts list

High performance cylinder liner

The cylinder liner is the core component to withstand the high-frequency reciprocating motion of the piston. We offer two top performance options:

High chromium bimetal cylinder liner: the shell is made of high strength forged steel, and the lining is made of high chromium (chromium content > 27%) alloy by centrifugal casting process. Bore hardness up to HRC 60-65, excellent wear resistance, under conventional drilling conditions, the service life of more than 800 hours.

Zirconia ceramic cylinder liner: the ultimate solution for extreme abrasion and corrosion conditions. The hardness of zirconia ceramic lining is very high (HRC 90 +) , the surface finish is mirror-like, and the friction coefficient is very low. Its service life can reach bimetallic cylinder liner 4-5 times, significantly reduce piston wear and lubricating water consumption, greatly reducing long-term operating costs.

Piston and piston rod

Pistons: we offer integrally vulcanized bonded pistons with a 40CR or 45 # steel core and a high performance polyurethane or hydrogenated nitrile rubber (HNBR) skin. This design ensures reliable sealing and extrusion resistance at pressures up to 7,500 PSI.

Piston rod: forged in high strength alloy steel (42CrMo) , quenched and tempered and precision ground. The rod body is plated with a thick layer of hard chromium, providing a smooth and extremely wear-resistant surface, ensuring a perfect fit with the packing seal and effectively preventing leakage.

Optional Upgrade: P-Quip Quick Change System

To minimize maintenance downtime and improve on-site safety, we strongly recommend the P-Quip quick-change system for your 8T750. The system uses hydraulic or pneumatic tools to realize the quick and hammerless disassembly and assembly of valve cover, piston rod and cylinder liner.

Customer value:

Significantly reduced downtime: up to 75% reduction in time to replace perishable parts.

Intrinsically safe: eliminates the need for hand tools such as sledgehammers, significantly reducing the risk of injury.

Extended Component Life: the system provides constant, accurate preload to avoid component damage due to over-tightening or over-loosening.

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