Abrasive Sandstone Polished Rod Protector for Oil Well Pumping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Oil leaks from worn polished rods in oil well pumping systems cause environmental hazards, safety risks, and financial losses, as they lead to damage and wear of packings, necessitating a solution to prevent damage and maintain smoothness.
Innovation Solution
A cylindrical protective device made of abrasive sandstone material wraps around the polished rod, secured with a hose clamp, and tied off to the packing, filing down rough edges and oil chips during cyclic motion to prevent leaks and extend the lifespan of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the polished rod operates continuously in high-stress environment, then oil extraction productivity is maintained, but the polished rod suffers wear and tear leading to rough edges and leaks
Solution Approach 1:
A protective device made of abrasive material is introduced as an intermediary between the polished rod and the environment. This device wraps around the polished rod and files down rough edges during operation, preventing leaks while allowing continuous productivity. The mediator absorbs the wear and tear instead of the polished rod itself.
2Reliability
If the polished rod is protected from wear, then leak prevention and component lifespan are improved, but the device complexity increases due to additional protective components
Solution Approach 1:
The protective device uses a flexible wrap-around structure that conforms to the polished rod geometry. This thin-film approach provides protection without adding significant structural complexity. The flexible nature allows easy installation and removal while maintaining simplicity in design.
Solution Approach 2:
The protective device is self-filing, meaning it automatically files down rough edges on the polished rod during normal operation through its abrasive surface. This self-service mechanism eliminates the need for external maintenance equipment or complex adjustment mechanisms, reducing overall device complexity.
3Duration of action of stationary object
If the polished rod surface is maintained smooth, then packing wear is reduced and operational lifespan is extended, but maintenance time and operational interruptions increase
Solution Approach 1:
The protective device enables continuous filing action during normal pump operation without requiring shutdowns. The abrasive surface continuously contacts the polished rod during each stroke, maintaining smoothness throughout operation. This eliminates separate maintenance intervals and reduces total downtime.
Solution Approach 2:
The system performs its own maintenance function through the self-filing mechanism. The protective device automatically removes rough edges and prevents packing wear during normal operation, eliminating the need for external maintenance interventions and reducing maintenance time significantly.
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 device effectively prevents oil leaks, reduces friction and wear on packings, and extends the lifespan of polished rods and packings, minimizing operational losses and regulatory fines.
Implementation Method 1
The protective device is made of abrasive sandstone material... filing down rough edges and oil chips during cyclic motion
Data Source
AI summary
A cylindrical protective device is disclosed for the polished rod and packing of an oil well pumping system. The protective device is constructed with abrasive sandstone material, wraps around the polished rod, and is positioned on top of, or anchored to, the packing. The device has two symmetrical parts, each part having semicircular structure, the parts when joined together form a circular cavity to accommodate the polished rod therethrough. As the polished rod undergoes cyclic motion driven by a horsehead, the device smooths rough edges and oil chips, extending the polished rod's lifespan. By reducing friction and minimizing wear on the packing, the device prevents oil and natural gas leaks during the pumping process. Using the protective device, pump systems can operate more efficiently, ensuring a smoother and safer oil extraction process.