Circular Linear Synchronous Motor Oil Pumping Unit
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Solution Overview
Problem
Current oil artificial lift technologies face challenges such as high initial investment and electrical consumption in rotary motors, shorter lifespan and higher breakdown rates in progressive cavity pumps, and complex structures with low performance and high energy use in beam/sucker-rod pumping systems.
Innovation Solution
An oil pumping unit utilizing a circular linear synchronous motor with rare earth permanent magnets to reciprocate a pump and an oil suction pipe, allowing continuous oil extraction during both up and down strokes, reducing energy consumption and increasing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary motor is used in electrical submersible pump, then oil production capacity is improved, but initial investment and electrical consumption increase
Solution Approach 1:
The patent replaces the traditional rotary motor with a linear motor system. The linear motor directly generates linear motion to reciprocate the pump barrel and suction pipe, eliminating the need for rotary-to-linear conversion mechanisms. This substitution reduces electrical consumption while maintaining oil production capacity, as the linear motor operates more efficiently in this application context.
2Ease of manufacture
If progressive cavity pump is used, then initial investment is reduced, but lifespan is shortened and breakdown rate increases
Solution Approach 1:
The patent divides the pumping system into distinct functional components: the linear motor, the reciprocating pump barrel, the suction pipe, and the discharge pipe. This segmentation allows each component to be optimized independently for durability and reliability. The simplified linear motor design with fewer moving parts reduces breakdown points, while the robust pump barrel and pipe assembly ensure long service life, addressing the reliability issues of progressive cavity pumps.
3Reliability
If beam/sucker-rod pumping system is used, then durability is improved, but structure becomes complicated and energy consumption increases
Solution Approach 1:
The patent extracts and eliminates the complex surface beam mechanism and sucker rod system from the pumping apparatus. Instead, it uses a compact linear motor positioned downhole that directly drives the pump barrel reciprocation. This extraction of the complex mechanical transmission system simplifies the overall structure significantly while maintaining durability through the use of robust linear motor and pump components.
4Productivity
If traditional reciprocating pump is used with rotary motor, then oil pumping function is achieved, but energy is wasted during non-pumping phases
Solution Approach 1:
The patent implements continuous useful action by using the linear motor to reciprocate the pump barrel in both upward and downward strokes. During the upward stroke, the pump barrel draws oil into the suction pipe; during the downward stroke, it continues to push oil through the discharge pipe. This eliminates idle phases where traditional systems consume energy without pumping, ensuring continuous productive operation and reducing energy waste.
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 solution enables continuous and efficient oil extraction with reduced energy consumption and improved durability, addressing the limitations of existing technologies by using a circular linear synchronous motor to drive the pump and suction pipe reciprocation.
Implementation Method 1
an electrical submersible pump driven by a circular linear synchronous three-phase motor with rare earth permanent magnet
Implementation Method 2
uses a linear motor to reciprocate an oil suction pipe, causing the oil suction pipe to suck and deliver crude oil during the operation of the linear motor
Implementation Method 3
pumps the oil from underground to ground surface
Data Source
AI summary
An oil pumping unit is disclosed to include a motor, which has a mover that moves alternately up and down when the motor is electrically connected, and a pump, which has a barrel, an oil suction pipe mounted in the barrel, an inner sleeve, which is connected to the suction pipe and has installed therein a mixing valve, a movable valve and a piston, a bottom one-way oil intake valve, and a one-way mixing flow intake valve respectively arranged in such a manner that when the mover is operated to reciprocate the oil suction pipe, crude oil is alternately pumped through the one-way bottom oil intake valve and the one-way mixing flow intake valve to alternately pass through the movable valve and the mixing valve to the ground.