Drilling Joint Sealing Ring Structure for Wear and Lubrication
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Solution Overview
Problem
The use of water-based drilling muds in oil drilling stations leads to increased wear between stationary and moving parts of the connection joint, reducing the joint's lifespan and necessitating frequent replacements, which is economically detrimental.
Innovation Solution
A sealing ring and joint design featuring O-rings, springs, and adjustable compression rings to maintain sealing and lubrication, with specially shaped rotating and stationary rings to enhance contact and reduce wear, using materials like AISI 400 stainless steel or ceramic for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based drilling muds are used, then environmental impact is improved, but wear between stationary and moving parts increases
Solution Approach 1:
The patent changes the material parameters of the sealing rings by using composite materials with different properties for the stationary and rotating rings. Specifically, it uses materials with optimized friction coefficients and wear resistance properties to compensate for the lower lubricating capacity of water-based muds, thereby reducing wear while maintaining environmental compatibility.
Solution Approach 2:
The patent employs composite materials for the sealing rings, combining materials with complementary properties. The stationary ring uses a material with high wear resistance, while the rotating ring uses a material with low friction coefficient. This composite approach allows the system to withstand the increased wear conditions caused by water-based muds without sacrificing environmental benefits.
2Object-affected harmful factors
If water-based drilling muds are used, then environmental compatibility is improved, but joint lifespan decreases
Solution Approach 1:
The patent modifies the surface parameters of the sealing rings through material selection and surface treatment to enhance durability. By using materials with optimized mechanical properties and surface characteristics, the joint lifespan is extended despite the use of water-based muds that provide less lubrication and protection.
Solution Approach 2:
The sealing rings act as intermediary elements between the stationary and rotating components. They are specifically designed with materials and surface treatments that mediate the interaction between the joint components and water-based muds, reducing direct wear and extending the overall joint lifespan while maintaining environmental compatibility.
3Device complexity
If conventional sealing rings are used, then device complexity is low, but wear and maintenance frequency increase
Solution Approach 1:
The patent changes the material parameters of the sealing rings without fundamentally altering the sealing structure design. By selecting materials with superior wear resistance and friction properties, the patent achieves enhanced reliability while maintaining relatively simple device complexity. The sealing rings themselves remain structurally simple but are made from advanced composite materials.
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 design significantly reduces wear and extends the life of the joint, maintaining effective sealing and lubrication, thereby reducing maintenance costs and downtime.
Implementation Method 1
O-rings, springs, and adjustable compression rings to maintain sealing
Implementation Method 2
O-rings, springs, and adjustable compression rings to maintain sealing
Implementation Method 3
specially shaped rotating and stationary rings to enhance contact and reduce wear
Implementation Method 4
enhance contact and reduce wear
Data Source
AI summary
A sealing ring for a joint of an oil drilling station that has a flat annular contact region provided with a plurality of circumferentially arranged grooves is provided. Each groove has a predetermined radial extension on the contact region and is axially lowered and accessible from an inner side face of the sealing ring.