Composite Cement Retainer for Faster Drilling and Secure Placement
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Solution Overview
Problem
Existing cement retainers in the oil and gas industry often take too long to place, drill through, and fail to remain in the desired location, leading to inefficiencies and increased costs due to damage to drill bits and retrieval time.
Innovation Solution
The use of a composite material, including components such as aluminum and epoxy-based resin with glass fiber, for the cement retainer, which allows for faster drilling and improved retention in the desired location, utilizing a design with a semi-conical nose cone, teeth, slips, and a valving system for efficient cement delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional metal cement retainers are used, then structural strength is maintained, but drilling time increases and drill bit damage occurs
Solution Approach 1:
The patent applies composite materials by combining aluminum matrix with discontinuous ceramic particles (such as alumina, silica, or magnesia). This composite structure provides both the drillability of lighter materials and the structural strength required for cement retainer function, resolving the contradiction between drilling time and retainer strength.
Solution Approach 2:
The patent changes the material parameters by using aluminum-based composite materials with specific ceramic particle compositions and distributions. These parameter changes enable the retainer to have optimized mechanical properties that balance strength requirements with reduced drilling resistance, eliminating both excessive drilling time and drill bit damage.
2Productivity
If cement retainer placement speed is increased, then operational efficiency improves, but retention reliability may be compromised
Solution Approach 1:
The patent incorporates preliminary action by pre-configuring the retainer with expansion elements and locking mechanisms that automatically engage upon placement. This preliminary preparation allows for rapid deployment while ensuring reliable retention, as the retention mechanism is already in place before actual cement placement begins.
Solution Approach 2:
The patent applies dynamics through expandable elements that transition from a compact state during rapid deployment to an expanded state for secure retention. This dynamic behavior enables the retainer to be placed quickly while maintaining high retention reliability once positioned.
3Ease of manufacture
If composite materials are used for the retainer body, then drillability improves, but manufacturing complexity increases
Solution Approach 1:
The patent employs aluminum-based composite materials that are optimized for single-use applications. These materials provide excellent drillability and are designed to be disposed of after one use, eliminating the need for complex manufacturing processes that would be required to make the retainers reusable. The simplicity of the disposable design offsets the material complexity.
Data Source
AI summary
A system and method for a composite cement retainer. A composite cement retainer has various components. When these various components comprise composite where feasible, or a drillable metal, the retainer can be easily placed and quickly drilled if necessary.