Oil Pumping Apparatus Without Speed Reducer
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Solution Overview
Problem
Current oil pumping apparatuses with mechanical speed reducers have complex structures, poor reliability, high maintenance costs, and short service life, especially in deep wells and low-permeability wells, requiring a more efficient and cost-effective solution for long-stroke oilfield operations.
Innovation Solution
An oil pumping apparatus without a speed reducer, utilizing a high-torque motor connected to a load roller via a heavy-duty timing belt, with a balance box and loss-of-load protection mechanism, and an automatic control system for efficient vertical movement and maintenance reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a mechanical speed reducer is used in the oil pumping apparatus, then the motor speed can be reduced to achieve vertical reciprocating movements, but the structure becomes complex and reliability deteriorates
Solution Approach 1:
The patent replaces the traditional mechanical speed reducer with an electric motor that directly provides the required low speed and high torque through its inherent characteristics. The motor's rotor diameter is designed to be at least five times the diameter of the motor wheel, creating a built-in speed reduction mechanism that eliminates the need for separate mechanical gear systems, thereby simplifying the overall structure while maintaining the required speed reduction function.
Solution Approach 2:
The motor serves multiple functions simultaneously: it provides both the driving force and the speed reduction function that were previously separated into different components. By integrating the speed reduction capability into the motor's design (through the large rotor diameter), the system reduces the number of separate components needed, simplifying the overall apparatus structure.
2Speed
If a mechanical speed reducer is used in the oil pumping apparatus, then the motor speed can be controlled, but the service life becomes short due to wear and maintenance needs
Solution Approach 1:
The patent eliminates the mechanical speed reducer and its associated wear-prone components by using an electric motor with a large rotor diameter (at least five times the motor wheel diameter) to provide inherent speed reduction. This substitution removes the mechanical transmission chain that causes wear, oil leakage, and maintenance requirements, thereby extending the service life of the oil pumping apparatus.
3Speed
If a mechanical speed reducer is used in the oil pumping apparatus, then the motor speed can be reduced, but maintenance costs increase due to wear and oil leakage
Solution Approach 1:
The patent replaces the mechanical speed reducer with an electric motor design featuring a rotor diameter at least five times the motor wheel diameter. This eliminates the mechanical transmission components that require maintenance (gears, lubrication systems, seals), thereby reducing maintenance costs and improving ease of operation despite the increased motor size.
4Device complexity
If the first wheel diameter is at least five times the second wheel diameter, then the speed reduction ratio is achieved without mechanical gears, but the apparatus size increases
Solution Approach 1:
The patent uses a electric motor with a rotor diameter at least five times the motor wheel diameter to replace mechanical gear systems. While this increases the motor's physical size, it eliminates the need for complex mechanical transmission components, achieving structural simplicity and reduced overall apparatus complexity despite the larger motor footprint.
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 apparatus achieves reliable, long-lasting, and cost-effective oil pumping with reduced maintenance needs, suitable for deep and low-permeability wells, enhancing operational efficiency and extending service life.
Implementation Method 1
a driven belt covering the first wheel and the second wheel and being a heavy-duty timing belt to enable synchronous drives
Implementation Method 2
a load belt moveable over the roller, one end of the load belt being connected to the connector, and the other end of the load belt being connected to a balance box to balance the weight of the device
Data Source
AI summary
There is provided an oil pumping apparatus including: (1) a connector connected to a device; (2) a top platform; (3) a roller disposed on a top platform; (4) a motor disposed on the top platform; (5) a driven belt to enable synchronous drives to operate the roller; (6) a load belt moveable over the roller, one end of the load belt being connected to the connector, and the other end of the load belt being connected to a balance box to balance the weight of the device; and (7) a control system for the apparatus. When the motor rotates in a clockwise direction, the motor drives the roller rotate in the clockwise direction and the device moves down vertically; and when the motor rotates in an anticlockwise direction, the motor drives the roller rotate in the anticlockwise direction and the device moves up vertically.