DRILLMEC 9T800 Pump

Typical application areas:

Deep and ultra-deep well drilling: by virtue of its high-pressure capacity, it provides the necessary circulating pressure for drilling through deep geological structures.

High-flow operations: provide adequate mud circulation during drilling of large-diameter sections requiring rapid hole cleaning.

Geothermal drilling: capable of dealing with high temperatures and complex geological conditions in geothermal wells.

Land and offshore rigs: the compact and reliable design of the Drillmec-8000 series is trusted by drilling contractors as the core power equipment of high-end rig packages.

Table 1: DRILLMEC 9T800 key technical specifications

Power End Assembly: a strong and durable power base

Rack

The frame of the power end adopts welded steel plate structure, and after the welding is completed, the whole stress relief heat treatment is carried out. This key process eliminates the internal stress generated in the welding process, greatly improves the rigidity and strength of the frame, and effectively prevents the crack or deformation caused by metal fatigue under high load cycle.

Materials and processes for crankshaft and pinion shafts

Crankshaft: our crankshafts are made of high quality forged alloy steel (modified 4340 or equivalent) . The forging process makes the internal grains of the metal flow and refine along the direction of the force, forming a dense fibrous structure, which fundamentally eliminates the casting defects and endows the crankshaft with unparalleled fatigue strength and toughness.

Pinion Shaft: the Pinion Shaft is also made of forged alloy steel (42CrMo) to ensure that it can withstand high input torque from a drive motor or diesel engine, and through the precision machining of the herringbone tooth will transfer power smoothly to the crankshaft gear.

Bearing and crosshead arrangement

In order to cope with the huge radial and axial load, the power end of the use of a full range of heavy-duty bearing configuration. Double Row spherical roller bearings are fitted at both ends of the crankshaft and high capacity roller bearings are used for the connecting rod ends. This configuration ensures the stability and load capacity of the crankshaft during high-speed rotation.

The crosshead assembly is the key to connect the power end and the hydraulic end. Our crosshead guide plate (slide plate) is made of wear-resistant manganese bronze or other advanced wear-resistant materials, and after precision machining guide, forming a low friction, high wear-resistant sliding pair. This not only ensures the linear motion accuracy of the piston rod, but also significantly prolongs the service life of the crosshead and the guide plate.

Lubrication system

Reliable lubrication is the guarantee of long-life operation of the power end. The 9T800 pump adopts the combined lubrication mode of forced lubrication and splash lubrication. Driven by the gear oil pump inside the frame, the lubricating oil is forced to be delivered to the key friction pairs such as bearings, crossheads and guide plates through the pipeline. At the same time, the rotation of the gears also drives the oil splash, the whole power chamber is cooled and lubricated.

Modular design and materials science

The 9T800 hydraulic end is designed with an advanced l-shaped, Mono-block forging module. The advantages of this design over conventional split or cast manifolds are obvious:

Excellent compression performance: the module is forged from a solid high-strength alloy steel (35CRMO or AISI 8620) by thousands of tons of presses, and its internal metal grain streamlines are completely distributed along the contour of the module, the defects such as porosity and inclusion in the castings can be eliminated, and the working pressure can be up to 7,500 PSI.

Optimized fluid dynamics: the L-type (valve-on-valve) structure provides a more straight and smooth fluid passage, reduces turbulence and energy loss of mud flow, improves the hydraulic efficiency of the pump, and improves the performance of the pump, and effectively slows down the erosion and corrosion of the inner wall of the valve box.

Easy to maintain: three hydraulic cylinder modules can be interchanged independently, when a module is worn or damaged, it can be replaced separately, which greatly reduces the maintenance cost and time.

All hydraulic end modules and components are manufactured in strict compliance with API 7K to ensure product safety, reliability and worldwide interchangeability.

Integrity of the valve system

Valve body and seat: high quality forged alloy steel (20CrMnTi or AISI 8620) .

Key heat treatment process: the valve body and seat are carburized and quenched. This process forms a wear-resistant layer with controllable depth and extremely high hardness (HRC ≥60) on its surface, while its core still maintains good toughness, which enables it to resist the high-speed erosion of solid particles in the mud, it can also withstand the huge impact force generated when the valve is closed, thus avoiding brittle fracture.

Valve plug-in: made of high-performance polyurethane (PU) material, with excellent wear resistance and resilience, to ensure that under high pressure and valve seat tightly fit, reliable seal.

Bonnet: usually threaded or bolted-on bonnet for quick and safe replacement of valve assembly.

P-Quip Quick Change System compatibility

In order to comply with the higher requirements of modern drilling operations for efficiency and safety, our 9T800 pump and its accessories are designed with full consideration for compatibility with the P-Quip quick-change system. The system can quickly lock and release the vulnerable parts such as valve cover, cylinder liner and piston rod by hydraulic or mechanical means, which shortens the replacement time from hours to minutes and significantly reduces the non-production time (NPT) , and greatly reduce the operating intensity and safety hazards of operators in high-risk areas.

Table 2: Drillmec 9T800 performance data (flow vs. pressure)

High-quality wearing parts and accessories: the core of ensuring continuous operation

Liners

High-chrome Bimetal Liners: the casing is made of high-strength forged steel (45 # steel) to withstand high pump pressure, while the inner liner is made of centrifugally cast High-Chrome alloy (≥27% chromium) after heat treatment, the bore has a hardness of HRC 60-65 and a service life of 800-1000 hours.

Zirconia Ceramic Liners: Zirconia Ceramic Liners have an extremely high hardness (HRC 90 +) , a precision honed, mirror-like surface, and an extremely low coefficient of friction. Compared with traditional alumina ceramics, zirconia ceramics have higher fracture toughness and impact strength, and are not easy to shatter. Its ultra-long service life (up to 4000 hours) can significantly reduce the number of downtime to replace, reduce piston wear and lubricating water consumption.

Pistons

Construction and materials: we offer high performance integrally vulcanized bonded pistons. The piston core is made of forged alloy steel (42CRMO or 45 # steel) to ensure no deformation under high pressure. The piston rubber is made of special high performance polyurethane (PU) or hydrogenated nitrile rubber (HNBR) .

Performance advantages: polyurethane material has excellent wear resistance and extrusion resistance, especially suitable for oil-based mud and high solid content conditions. HNBR performs well at high temperatures and in chemically aggressive environments. The optimized lip design ensures an effective dynamic seal with the inner wall of the cylinder liner throughout the stroke.

Piston Rods & Pony Rods

Material and process: high strength forged alloy steel (SAE 4140/42CrMo) , quenched and tempered heat treatment to obtain the best comprehensive mechanical properties. The rod body is precisely ground to ensure dimensional accuracy and surface finish.

Surface treatment: the surface of the rod body is plated with hard chromium to form a hard, smooth and corrosion-resistant protective layer, which effectively resists the wear of the packing box and the corrosion of the mud, and prolongs the service life of the piston rod and the packing seal.

Valve Assembly

Standards and materials: Our Valve assemblies are API # 6 or API # 7 compliant. Both body and seat are forged alloy steel (AISI 8620/20CRNIMO or 20CrMnTi) .

Core manufacturing process: after carburizing and quenching treatment, the surface hardness of the key sealing surface reaches HRC 60 and above, followed by precision grinding, which ensures extremely high wear resistance and perfect sealing.

Plug-ins and seals: plug-ins are made of wear-resistant polyurethane, while other seals and gaskets are made of high-quality nitrile rubber (NBR) or hydrogenated nitrile rubber (HNBR) , depending on the application.

Other key attachments

Pulsation Dampener: Hydril K-20 and other types of dampeners and airbags are available. Its function is to absorb the pump outlet pressure pulsation, make the pipeline pressure more stable, protect the downstream equipment and instruments, and reduce the vibration of the whole system.

Safety Relief Valve: provides a shear pin or spring-loaded Relief Valve and is the ultimate Safety Valve for pumps and piping. When the system pressure exceeds the preset value, the safety valve will automatically open the pressure relief to prevent equipment damage and personnel injury.

Liner Cooling System: a System of spray pumps, pipes, and nozzles that continuously cools and washes the Liner and piston, effectively removing heat from friction and abrasive particles, thus extending the life of the cylinder liner and piston.

With its rugged design and reliable performance, the DRILLMEC 9T800 triplex mud pump is ideal for the following demanding operating environments:

Deep-well exploration on land and sea: to provide stable and continuous high-pressure circulation during drilling of formations thousands of meters deep, large rigs, such as the Drillmec-8000 series, are not or-large displacement and horizontal well drilling: its high displacement capacity ensures efficient cutting removal in large size wellbores or in long horizontal intervals, effective prevention of downhole complications.

Geothermal energy development: it can adapt to the high temperature, high pressure and strong corrosive fluid environment of geothermal wells, and ensure the smooth progress of geothermal drilling projects.

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