Mud Pumps

Bentec Mud Pumps represent the latest in technology, offering improved reliability and easier maintenance.

For additional details, please check out HRSB.

Available Capacities:

' 1 600 hp ' Rear-Mounted Motor (AC & DC)
' 1 600 hp ' Top-Mounted Motor (AC)
' 2 200 hp ' Top-Mounted Motor (AC)

Unique Features

' direct-driven external gearbox
' no internal gear
' patented liner clamping
' quick valve clamping
' compact design
' suitable for both onshore and offshore rigs
' components produced to API 7K standards
' CE compliant

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       Mud Pump                  Smart Fluid Ends

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Details

Bentec has entirely redefined the concept of Mud Pumps. Equipped with a direct-driven gearbox, a proprietary motor, and a cutting-edge pump housing, these systems eliminate the need for internal gears that often bring several challenges, along with the issue of belt tensioning.

The Bentec Mud Pumps are specifically designed for the tasks they are meant to handle: efficient pump operations.

These pumps are lightweight and have a compact design, with AC motors available in either top or rear-mounted configurations that accommodate any drilling rig set-up. Customers can choose from fluid ends that operate at 5,000 or 7,500 psi, with all wear components conforming to API standards and readily available worldwide.

A handling crane facilitates the management of fluid end components, while Bentec also features a patented liner and valve clamping system that significantly reduces maintenance time. The quick-change liner and piston system streamline maintenance tasks. Notably, the Bentec Mud Pump also includes a side-mounted gear drive.

This innovative design eliminates the necessity for chain or belt tensioning. The two-stage helical gear provides a direct connection to a balanced, forged/welded crankshaft, resulting in quiet and vibration-reduced operations.

Furthermore, systems for liner cooling and gear oiling are standard; optional installations of a supercharge pump and noise reduction package are also available. The Bentec Mud Pump is the optimal choice for noise-sensitive environments, such as offshore locations or densely populated areas.

In addition to supplying Mud Pumps, Bentec provides complete system solutions, offering the pumps alongside a Bentec Power Control System and a Bentec Soft Pump System.

A mud pump, sometimes called a mud drilling pump or drilling mud pump, is a reciprocating piston/plunger pump created to circulate drilling fluid under high pressure (up to 7,500 psi or 52,000 kPa) down the drill string and back up the annulus. Mud pumps are crucial components of equipment utilized in oil well drilling.

Classification

According to the Acting Type

Mud pumps can be classified as either single-acting or double-acting, based on the number of times suction and discharge occur during one complete cycle of the piston’s reciprocating motion.

According to the Quantity of Liners (Piston/Plunger)

Various sizes and configurations of mud pumps exist, but the triplex (three piston/plunger) mud pump is typically utilized on petroleum drilling rigs. Duplex pumps (two piston/plungers) have largely been replaced by triplex pumps, yet remain common in developing regions. Recent developments include hex pumps with six vertical pistons/plungers and various quintuplexes featuring five horizontal pistons/plungers. These new pumps provide advantages over conventional triplex pumps, such as reduced noise levels, facilitating improved measurement while drilling (MWD) and logging while drilling (LWD) decoding.

Composition

Standard mud pumps comprise two main assemblies: the fluid end and the power end.

Fluid End

The fluid end is responsible for the pumping action, including valves, pistons, and liners. To ease maintenance, modern designs allow for quick replacement of these high-wear components. Additionally, to mitigate severe vibrations generated during operation, pumps are equipped with suction and discharge pulsation dampers connected to the fluid end’s inlet and outlet.

Power End

The power end converts the rotation of the drive shaft into reciprocating motion for the pistons, usually achieved via a crosshead crank gear. For further insights, kindly visit Mud Pumps for Drilling Rigs.

Mud Pump Parts

A mud pump consists of several components, including the mud pump liner, piston, modules, hydraulic seat pullers, and additional parts. Key components include:

1. the housing itself,
2. the liner with packing,
3. the cover plus packing,
4. the piston and piston rod,
5. suction valve and discharge valve with their respective seats,
6. stuffing box (only in double-acting pumps),
7. gland (only in double-acting pumps),
8. pulsation damper.

Performance Parameters

Two primary metrics are used to evaluate mud pump performance: displacement and pressure.

Displacement

Displacement refers to the volume of fluid discharged per minute. It is influenced by the diameter of the drilling hole and the return speed of the drilling fluid. To effectively clear debris and rock cuttings, the return speed should remain consistent. Generally, for drilling cores, this speed is between 0.4 to 1.0 m³/min.

Pressure

The pressure exerted by the pump is contingent on the drilling depth and the resistance encountered by the flushing (drilling) fluid. Greater drilling depths and increased pipeline resistance necessitate higher pressures. Adjustment of pump displacement is possible via the gearbox or hydraulic motor. Installing flow meters and pressure gauges on the pump allows for precise measurements of these parameters.

Characteristics

1. Simplicity in structure facilitates easy disassembly and maintenance
2. Smooth operation, low vibration, and minimal noise levels
3. Capable of handling high concentrations of viscous (less than PaS) suspended slurries
4. Consistent fluid flow with no surging, pulsation, or shearing
5. Discharge pressure remains independent of speed; low flow can maintain elevated discharge pressures
6. Displacement correlates with speed and can be modified by shifting mechanisms or motors
7. Exceptional self-absorption capability, allowing for direct suction without a bottom valve

Maintenance

It is crucial for the construction department to assign dedicated maintenance personnel for the upkeep and repairs of equipment, including mud pumps. Regular inspections and maintenance are essential to identify and resolve issues proactively, thereby avoiding unexpected downtimes. The operator should monitor sediment particle sizes, as larger particles increase wear on pump parts, necessitating more frequent checks for potential repairs or replacements. Commonly worn components include pump casings, bearings, impellers, pistons, and liners. Implementing advanced anti-wear strategies extends the life of these parts, which can subsequently reduce project investment costs and improve operational efficiency. Whenever feasible, repairs should be prioritized over replacements for worn components.

See Also

References