Straight-bore Back Pressure Valve Radial Friction Locking
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Solution Overview
Problem
The installation of back pressure valves in wellhead systems is complex and time-consuming due to high pressures and the need for specific bore designs with engagement features, which increases costs and operational complexity.
Innovation Solution
A back pressure valve designed for installation in a straight bore without engagement features, using a friction member that expands radially to secure itself within the bore, facilitated by a locking ring and hydraulic pressure, allowing for secure sealing without additional bore modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional back pressure valves are installed in wellhead systems with high pressures, then reliable pressure control is achieved, but installation complexity and time increase due to the need for specific bore engagement features
Solution Approach 1:
The invention extracts and eliminates the engagement features (shoulders, grooves, notches) from the bore design, allowing the back pressure valve to be installed in a straight bore without these additional features. This simplifies the bore design while maintaining reliable pressure control through alternative sealing and positioning mechanisms.
Solution Approach 2:
The back pressure valve is designed with universal compatibility to work with various tubing hanger bore designs. The valve incorporates features that allow it to be installed in straight bores without requiring custom engagement features for each specific application, thereby reducing installation complexity across different wellhead systems.
2Stability of the object's composition
If complementary engagement features are added to the bore to secure the back pressure valve, then valve positioning stability improves, but bore design complexity and manufacturing difficulty increase
Solution Approach 1:
The invention removes the engagement features (shoulders, grooves, notches) from the bore design, eliminating the need for complex bore manufacturing processes. The valve achieves stable positioning through its interaction with the straight bore walls and sealing mechanisms rather than through complementary engagement features.
Solution Approach 2:
Instead of modifying the bore to accommodate the valve through engagement features, the invention inverts the approach by designing the valve to accommodate the straight bore. The valve incorporates features that enable it to secure itself within the simple bore geometry, reversing the traditional design paradigm.
3Reliability
If multiple sequential running procedures are used to install the back pressure valve in high pressure bores, then secure valve setting is achieved, but installation time and cost increase
Solution Approach 1:
The invention extracts and eliminates the need for multiple sequential running procedures by designing a back pressure valve that can be installed in a single operation into a straight bore. The simplified valve design and bore configuration allow for direct installation without requiring multiple sequential procedures, thereby reducing installation time while maintaining secure valve setting.
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
This solution simplifies the installation process, reduces operational time and costs, and enables the back pressure valve to be compatible with various tubing hanger designs, improving the efficiency and flexibility of wellhead system operations.
Implementation Method 1
facilitated by a locking ring and hydraulic pressure
Implementation Method 2
using a friction member that expands radially to secure itself within the bore
Data Source
AI summary
A system includes a back pressure valve. The back pressure valve includes a body, a plunger disposed internal to the body, and a friction member disposed about the exterior of the body. The friction member is configured to expand radially to contact an internal surface of a bore. A method includes disposing a back pressure valve into a straight bore and expanding a friction member of the back pressure valve radially into contact with an internal surface of the straight bore.