BOMCO F-1600 with Merrimac 7500 PSI Mud Pump

The Bomco F-1600 power end is renowned globally for its robust and durable design and excellent performance, providing a solid foundation for 7500 PSI high-pressure operations.

Robust Frame Structure

The F-1600 power end's frame is constructed from high-quality steel plates, welded and then subjected to stress-relief heat treatment. This process ensures a perfect combination of high strength, high rigidity, and lightweight. This structural design can withstand a rated input power of 1600 HP (1193 kW) and maintain stable operation under various harsh conditions. Necessary oil sumps and oil passages are integrated within the frame, ensuring reliable lubrication and cooling systems.

Gears:

The core of power transmission is an integral herringbone gear, a design that ensures smooth transmission, high efficiency, and long service life.

Crankshaft:

The crankshaft is a critical component of the power end, typically cast or forged from high-quality alloy steel (such as 35CrMo, 40CrMnMo, or 42CrMo). After heat treatment, the crankshaft exhibits excellent mechanical properties, impact resistance, and high strength. Some high-end crankshafts are integrally forged and balanced to ensure smooth operation, reduce noise and vibration, and extend the service life of both the bearings and the crankshaft itself.

Bearing Configuration:

Crankshaft Main Bearings: Typically utilize double-row spherical roller bearings to withstand high loads and accommodate certain axial displacements.

Pinion Shaft Bearings: Generally employ single-row cylindrical roller bearings.

Connecting Rod Big End Bearings: Installed on the three eccentric pins of the crankshaft, typically single-row cylindrical roller bearings.

Connecting Rod Small End (Crosshead Pin) Bearings: Usually double-row long cylindrical roller bearings.

The F-1600 power end adopts a combined forced and splash lubrication system, ensuring all moving parts receive adequate lubrication and cooling.

Durable Crosshead Assembly

The crosshead and its guides are manufactured from high wear-resistant materials, such as ASTM A48-83 Meehanite cast iron or ductile iron, providing excellent wear resistance and long service life. Some designs feature upper and lower guides, allowing concentricity adjustment by adding shims under the lower guide. The connection between the crosshead and the pony rod uses a bolted flange or coupling, ensuring rigidity and concentricity of the connection.

Core of High-Pressure Performance: Merrimac 7500 PSI L-Type Fluid End

To meet the extreme operating pressure of 7500 PSI (51.7 MPa), the Bomco F-1600 mud pump is specially equipped with a high-performance L-type fluid end manufactured by Merrimac Manufacturing Inc. Merrimac Manufacturing Inc. is renowned for its extensive experience and exceptional quality in the manufacturing of mud pump components.

L-Type Modular Structure Designed for Extreme Conditions

The Merrimac 7500 PSI fluid end features an advanced L-type modular design. This two-piece structure (separate suction and discharge modules), compared to traditional monoblock or valve-over-valve designs, offers significant advantages in ultra-high pressure applications. The L-type design not only facilitates maintenance, allowing individual module replacement when one wears out without replacing the entire fluid end, thereby significantly reducing maintenance costs and downtime. Simultaneously, this structural design is more conducive to distributing and withstanding the enormous stresses caused by 7500 PSI high pressure.

Valve System Designed for High Flow and High Pressure (API #7 Full Opening Type)

The F-1600 pump is typically equipped with API #7 valve assemblies, and the Merrimac 7500 PSI fluid end is also compatible with this standard, ensuring high flow capacity and component interchangeability under high pressure. The full-opening valve design minimizes fluid resistance, which is crucial for high-displacement operations.

Table 1: Merrimac 7500 PSI L-Type Fluid End - Key Design and Material Characteristics

Performance Data: Bomco F-1600 with Merrimac 7500 PSI Fluid End

The performance of the Bomco F-1600 mud pump equipped with the Merrimac 7500 PSI fluid end will align with the technical parameters of the Bomco F-1600HL (7500 PSI version). The following table lists the pressure and displacement capabilities at different liner sizes, providing key data for drilling engineers' operational design.

Table 2: Bomco F-1600 with Merrimac 7500 PSI Fluid End - Pressure and Displacement Parameters

(Data referenced from F-1600HL 7500 PSI performance table)

Note: The above data is calculated based on 100% volumetric efficiency and 90% mechanical efficiency. Actual performance may vary depending on working conditions and drilling fluid properties.

This performance table clearly demonstrates that by selecting different liner sizes, this pump package can provide a wide range of displacement options at pressures up to 7500 PSI, meeting the precise hydraulic parameter requirements for various well depths, wellbore sizes, and drilling processes.

High-Quality Supporting Components: Ensuring Maximum Uptime and Performance at 7500 PSI

In high-pressure operations, the quality and durability of mud pump wear parts are crucial for ensuring the continuity and economic efficiency of drilling operations. We offer a series of top-tier supporting components for the Bomco F-1600 pump package equipped with the Merrimac 7500 PSI fluid end, ensuring reliable operation and extended service life under extreme conditions.

High-Chrome Bimetallic Liners: The outer shell is made of forged steel, and the inner sleeve is high-chrome cast iron, integrally hardened to HRC 60-69. This type of liner offers excellent wear resistance and certain corrosion resistance, making it a reliable choice for high-pressure applications.

Zirconia Ceramic Liners: Rockwell hardness up to HRC 90 or higher (some can reach 92-94 Rockwell C), providing extreme wear resistance, corrosion resistance, and high-temperature performance, especially suitable for demanding 7500 PSI conditions. Their service life far exceeds traditional metal liners, lasting over 4000 hours.

Bonded Polyurethane Pistons: Designed specifically for oil-based muds and high-pressure conditions, offering excellent oil resistance and anti-extrusion properties. The piston core is typically forged from high-strength alloy steel (e.g., 42CrMo) and heat-treated to ensure structural integrity under high pressure.

High-Temperature Bonded Rubber Pistons: Suitable for water-based muds and high-temperature environments, utilizing special high-temperature resistant rubber materials.

Design Features: Advanced designs like "Bullnose" or "Flex-lip" enhance sealing effectiveness and wear resistance under high pressure. Companies like FET offer pistons specifically designed for 7500 PSI, such as Endurohead and Highlander HT.

High-Performance Polyurethane Inserts: Suitable for oil-based muds, offering excellent wear and tear resistance, and maintaining stable performance at 7500 PSI high pressure and temperatures up to 240°F (115°C) or even 350°F (177°C).

Nitrile Rubber (NBR) / Hydrogenated Nitrile Rubber (HNBR) Inserts: Selected based on drilling fluid chemical composition and temperature range, providing excellent fluid compatibility and sealing performance.

Piston Rods and Pony (Intermediate) Rods

Material and Manufacturing: Made from high-strength alloy steel (e.g., 42CrMo, 35CrMo, SAE 4140), forged and heat-treated to achieve extremely high tensile and compressive strength.

Surface Treatment: Rod surfaces are precision ground and typically hard chrome plated or treated with special coating technologies like Merrimac's "Merriloy" to provide excellent wear and corrosion resistance, significantly reducing the coefficient of friction.

Material Selection: High-quality nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), or polyurethane (PU) materials are chosen based on the application area and working temperature, ensuring sealing integrity and durability under high pressure.

Pulsation Dampener and Safety Valve

Pulsation Dampener: Equipped with an API-compliant KB-75 type or equivalent pulsation dampener, specifically designed for 7500 PSI conditions. Its bladder is made from durable materials (e.g., nitrile rubber) to effectively absorb pressure pulsations from the pump discharge, protecting the manifold system.

Safety Valve: Installation of a high-pressure shear pin safety valve, precisely calibrated to 7500 PSI system requirements, provides reliable overpressure protection for the pump and pipeline system.

Table 3: Bomco F-1600 with Merrimac 7500 PSI Fluid End - High-Quality Wear Parts

Field-Proven: Typical Application Areas

The combination of the Bomco F-1600 triplex mud pump and the Merrimac 7500 PSI fluid end, with its powerful drive and exceptional pressure capacity, is widely applicable to the following demanding drilling scenarios:

Deep Well Drilling:

Particularly suitable for drilling deep and ultra-deep wells ranging from 4,500 meters to 9,000 meters (approximately 15,000 feet to 29,500 feet). In these well depths, high discharge pressure is required to overcome significant annular pressure losses, effectively carry cuttings, and maintain wellbore pressure balance.

High-Pressure High-Temperature (HPHT) Operations:

In challenging environments such as HPHT wells, the 7500 PSI rated pressure meets the requirements for circulating high-density drilling fluids, controlling bottom-hole pressure, and performing well control operations.

Onshore and Offshore Drilling Rigs:

This pump package provides reliable drilling fluid circulation power for both large onshore drilling rigs and offshore jack-up or semi-submersible drilling platforms. Its F-1600HL model is particularly suitable for offshore deepwater, onshore, and horizontal wells, especially in remote areas like deserts.

Complex Wellbore Trajectories:

For drilling operations with complex wellbore trajectories, such as extended reach drilling, horizontal wells, and cluster wells, high-pressure, high-displacement mud pumps are critical equipment for ensuring wellbore cleanliness and stable drilling. The F-1600HL (7500 PSI) is optimized for these types of operations, with an increased displacement compared to the standard F-1600.

High-Pressure Jet Drilling:

The 7500 PSI pressure capability also makes it suitable for advanced drilling techniques like high-pressure jet drilling, which uses high-pressure fluid to assist rock breaking and increase drilling speed.

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