Threaded Tubular Connection With Impact-Absorbing Sealing Make-Up
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Solution Overview
Problem
Existing threaded connections for hammering interconnected tubular members into the ground for hydrocarbon exploration and production often fail to maintain sealing characteristics and can be damaged by hammering, making it difficult to determine the final make-up and ensuring proper force transfer.
Innovation Solution
A threaded connection design featuring a pin member with a tapered pin threaded portion and a box member with a tapered box threaded portion, including hooked threads for radial interference, an elastomeric sealing member, and specific contact configurations to ensure proper make-up and energy absorption, protecting against damage from hammering forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional threaded connections are used for hammering interconnected tubular members, then the connection can be made quickly, but the sealing characteristics are not maintained and the connection can be damaged by hammering forces
Solution Approach 1:
The patent applies beforehand cushioning by designing the threaded connection with specific geometric features (shoulders, noses, and tapered portions) that create controlled deformation zones. These features absorb hammering impact forces before they can damage the sealing elements or threaded portions, thereby maintaining sealing characteristics while enabling quick making speed
Solution Approach 2:
The patent changes the geometric parameters of the threaded connection, specifically using tapered pin and box threaded portions with specific angles, and positioning shoulders and noses at precise locations. These parameter changes allow the connection to withstand hammering forces while maintaining sealing integrity
2Ease of operation
If conventional threaded connections are used for hammering, then the connection can be assembled, but it is difficult or time consuming to determine if the required degree of sealing has been achieved
Solution Approach 1:
The patent employs a visual indicator mechanism where the box nose contacts the external shoulder at final make-up, creating a visible positional relationship that indicates proper assembly. This allows operators to easily detect when the required degree of sealing has been achieved without complex measurement tools
Solution Approach 2:
The threaded connection design allows the components themselves to indicate their assembly state. The contact between the box nose and external shoulder at final make-up serves as a self-indicating feature that shows when proper sealing is achieved, eliminating the need for separate detection systems
3Force
If conventional threaded connections are subjected to hammering forces, then the tubular members can be driven into the ground, but the threaded connection is damaged and general performance is impaired
Solution Approach 1:
The patent designs the threaded connection with shoulders and noses positioned to create controlled deformation zones that absorb hammering impact forces before they can damage the threaded portions or sealing elements. This beforehand cushioning protects the connection integrity while allowing the transmission of necessary hammering forces
Solution Approach 2:
The patent converts the potentially harmful hammering impact forces into beneficial controlled deformations of the shoulder and nose features. These controlled deformations absorb energy and protect the critical threaded portions and sealing elements from damage, thereby maintaining connection strength
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 allows for reliable determination of final make-up, effective energy absorption, and protection of the threaded connection from damage, ensuring correct force transfer and maintaining sealing integrity during hammering operations.
Implementation Method 1
the box member comprises an elastomeric sealing member located between the internal shoulder and the box threaded portion
Implementation Method 2
the pin threaded portion and the box threaded portion comprise hooked threads providing radial interference between crests of the pin threaded portion and roots of the box threaded portion
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A threaded connection for hammering interconnected tubular members into a ground, such as onshore land or offshore seabed, for exploration and production of a hydrocarbon well, said threaded connection comprising a pin member comprising an external shoulder, a pin nose and a tapered pin threaded portion located between the external shoulder and the pin nose, and a box member comprising an internal shoulder, a box nose and a tapered box threaded portion located between the internal shoulder and the box nose.