Well Servicing Pump Electric Motor Direct Crankshaft Coupling
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Solution Overview
Problem
Traditional well servicing pump systems driven by diesel engines have large footprints, generate noise and vibrations, increase environmental impact, and are costly to operate due to numerous moving parts, which complicates hydraulic fracturing operations.
Innovation Solution
A well servicing pump system utilizing two permanent magnet motors directly coupled to a crankshaft, eliminating the need for a separate transmission system and reducing the number of moving parts, thereby minimizing noise, vibrations, and maintenance costs, while increasing efficiency and power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diesel engine is used to drive the well servicing pump, then the pump can be powered reliably, but the system generates noise and vibrations, has a large footprint, and increases environmental impact
Solution Approach 1:
The patent replaces the mechanical diesel engine system with an electric motor system. The electric motor directly drives the pump without the complex mechanical transmission components (gearbox, coupling, belts) found in diesel engine systems, thereby eliminating noise and vibrations while maintaining power reliability. This substitution of mechanical drive system with an electric drive system resolves the contradiction between reliable power delivery and harmful noise/vibration generation.
2Power
If a diesel engine with transmission system is used, then the pump can be powered, but the system has numerous moving parts which increases operating and maintenance costs
Solution Approach 1:
The patent extracts and removes the intermediate transmission system (gearbox, coupling, belts, and other moving parts) from between the power source and the pump. By directly coupling the electric motor to the pump shaft, the system eliminates unnecessary mechanical components while preserving the essential power delivery function. This extraction of redundant components reduces device complexity and maintenance requirements while maintaining adequate power transmission.
3Power
If a traditional diesel engine system is used, then the pump can be operated, but the system has a large footprint which limits transportability
Solution Approach 1:
The patent merges the power source (electric motor) and the pump into a more integrated and compact configuration. By eliminating the separate transmission system and directly coupling the motor to the pump shaft, the overall system footprint is reduced. The electric motor's compact design combined with direct coupling creates a space-efficient assembly that maintains full power output capability while significantly reducing the physical space required, thereby improving transportability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces operating and maintenance costs, decreases noise and vibration, and enhances efficiency by eliminating the need for additional mechanical components, allowing for more units to be transported and deployed on a single truck or skid.
Implementation Method 1
a first permanent magnet motor, the first permanent magnet motor including a first rotor
Data Source
AI summary
A well servicing pump system for a hydraulic fracturing system includes a first permanent magnet motor, second permanent magnet motor, and crankshaft. The first and second permanent magnet motors each include a rotor mechanically coupled to or integrated with the crankshaft. The well servicing pump may include gearboxes coupled between the rotors and the crankshaft. The well servicing pump system also includes a fluid section that includes an inlet, a pressurization chamber, and an outlet. The inlet and outlet are fluidly coupled to the pressurization chamber. The well servicing pump also includes a plunger mechanically coupled to the crankshaft, the plunger at least partially positioned within the pressurization chamber.