Threadless Float Collar Bonded via Adhesive
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Solution Overview
Problem
Existing threadless float equipment for cementing in oil and gas operations is labor-intensive and costly due to the need for threaded components that require machining and are made from high-strength metals, making them time-consuming to drill or mill out after use.
Innovation Solution
A threadless float collar body connected to the inside of a casing string via an adhesive, eliminating the need for external threads and allowing the use of lighter materials like aluminum composites, with an annulus filled with adhesive for secure bonding and pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded components made from high-strength metals are used, then structural integrity under high pressures is maintained, but manufacturing complexity and removal time increase
Solution Approach 1:
The patent removes the threaded connection mechanism from the float collar design, extracting the complexity of threading while maintaining structural integrity through adhesive bonding. The float collar body is made without external threads, eliminating the need for machining and removal operations.
Solution Approach 2:
The patent replaces the mechanical threaded connection system with a chemical adhesive bonding system. Instead of using threads for attachment, the float collar is bonded to the casing string using adhesive material, substituting mechanical fastening with chemical bonding.
2Strength
If threaded components are used, then connection strength is ensured, but labor intensity and cost increase
Solution Approach 1:
The float collar is designed as a disposable component that is bonded with adhesive and left in place after use. Instead of being removed and reused like threaded components, the adhesive-bonded float collar is drilled out and discarded, reducing labor costs and simplifying the manufacturing process.
3Stress or pressure
If high-strength metals are used for threaded components, then pressure resistance is achieved, but removal time increases
Solution Approach 1:
The patent extracts the time-consuming threaded connection and removal process entirely. The float collar is bonded with adhesive and subsequently drilled out as a single operation, eliminating the need for threading removal and significantly reducing the time required for equipment removal after cementing operations.
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 reduces the time and cost of removing the float equipment after cementing operations, enabling faster and more efficient wellbore preparation while maintaining structural integrity under high pressures.
Implementation Method 1
an adhesive located in at least a portion of the annulus, wherein the adhesive bonds the float collar body to the inside of the casing string
Data Source
AI summary
Float collar equipment can be bonded to an inside of a casing string via an adhesive. An annulus can be located around an outside of a float collar housing and the inside of the casing string where the adhesive can be injected. The float collar housing does not require external threads or packers to secure the housing to the inside of the casing string. An injection sub can be used to inject the adhesive into the annulus. After curing or drying, the adhesive bonds the housing to the casing string. A seat, seat housing, or float shoe nose can be attached to the float collar housing via an adhesive or threads. The float collar housing can house one or more float assemblies. The float collar equipment can be bonded to the casing string at a wellsite or remote location prior to use in a cementing operation.