Blowout Preventer Shear Rams with Identical Geometry
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Solution Overview
Problem
Current drilling systems face challenges in efficiently controlling pressure surges and fluid flow during oil and gas extraction, particularly in subsea environments, where existing blowout preventer (BOP) systems are complex and costly to manufacture, install, and maintain due to the need for multiple types of rams with distinct geometries.
Innovation Solution
The implementation of a drilling system with a ram-type BOP that includes opposing shear rams with identical geometries, which can be actuated to shear and seal tubulars, reducing manufacturing and maintenance costs by eliminating the need for multiple ram types, and utilizing a single ram design with opposing rams that engage and seal the wellbore.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of rams with distinct geometries are used in BOP systems, then the system can handle different drilling operations and tubular configurations, but the manufacturing, installation, and maintenance costs increase significantly
Solution Approach 1:
The patent applies universality by designing a single ram type that can perform multiple functions. The ram assembly is configured to shear different sizes of tubulars (drill pipes, drill collars, casing) and can be positioned at various locations within the BOP stack, eliminating the need for multiple specialized ram types while maintaining operational versatility
Solution Approach 2:
The patent applies segmentation by dividing the ram assembly into modular components including the piston, rod, and blade sections. This modular design allows the same basic ram structure to be configured for different applications by adjusting the blade geometry or positioning, enabling one ram type to serve multiple purposes
2Adaptability or versatility
If multiple types of rams with distinct geometries are used in BOP systems, then the system can accommodate various tubular sizes and configurations, but the installation and maintenance complexity and cost increase
Solution Approach 1:
The universal ram design allows the same replacement part to be used across all BOP stack locations and applications. When a ram fails or requires maintenance, the same standardized ram assembly can replace any other ram in the system, significantly simplifying maintenance procedures and reducing the need for specialized inventory
Solution Approach 2:
The patent applies homogeneity by making all rams in the BOP stack identical in design and geometry. This standardization means that maintenance personnel deal with a single type of component throughout the system, reducing training requirements, simplifying troubleshooting, and making repairs more efficient
3Adaptability or versatility
If multiple types of rams with distinct geometries are used in BOP systems, then the system can perform specialized functions for different drilling scenarios, but the manufacturing cost increases
Solution Approach 1:
The patent reduces manufacturing costs by producing a single standardized ram design rather than multiple specialized types. This allows manufacturers to benefit from economies of scale, standardize production processes, and reduce tooling costs while still providing the necessary functional versatility through proper positioning and configuration of the universal rams
Solution Approach 2:
The patent merges the functions of multiple specialized rams into a single universal ram design. By combining the capabilities of what would traditionally require separate shear rams, pipe rams, and blind rams into one standardized assembly, the system reduces the total number of parts that need to be manufactured, inventoried, and installed
4Ease of manufacture
If a single ram design with opposing rams is used, then manufacturing and maintenance costs are reduced, but the ability to handle complex drilling operations must be maintained
Solution Approach 1:
The single standardized ram design achieves universality by being capable of performing shear operations on various tubular sizes and types. The ram can be positioned at different locations in the BOP stack and configured with appropriate blade geometries to handle drill pipes, drill collars, casing, and other tubulars, maintaining operational versatility while simplifying manufacturing
Data Source
AI summary
A blowout preventer (BOP) includes a main body that includes a bore extending through the main body. The BOP also includes a cavity intersecting the bore and a pair of opposing shear rams configured to shear a tubular located in the bore. The opposing shear rams are two duplicate shear rams.