Hinged Door Blowout Preventer for Ram Maintenance
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Solution Overview
Problem
Existing blowout preventer (BOP) systems are time-consuming and dangerous to maintain due to their configuration, particularly when it comes to the installation and removal of shear rams, which are critical for controlling wellbore pressures in high-pressure oil and gas production environments.
Innovation Solution
A BOP design featuring a hinged door assembly that facilitates easy access to the internal cavity for the installation and removal of ram blocks, combined with a machining tool for forming reinforcing ribs and angled passages to reduce weight and enhance structural integrity, allowing for safer and more efficient operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional BOP configuration is used, then structural integrity for high-pressure control is maintained, but maintenance operations become time-consuming and dangerous
Solution Approach 1:
The BOP system is divided into modular components including removable ram blocks, door assemblies with hinges, and separable shear rams. This segmentation allows individual components to be accessed, removed, and maintained independently without requiring complete disassembly of the entire BOP system, thereby reducing maintenance time and operational danger while preserving structural integrity.
Solution Approach 2:
The door assembly incorporates hinges that enable dynamic opening and closing access to the internal cavity. This dynamic mechanism allows operators to safely access ram blocks for maintenance operations without compromising the pressure-containing structure, resolving the contradiction between ease of maintenance and structural integrity.
2Productivity
If shear rams are installed in a traditional BOP configuration, then pressure control function is achieved, but installation and removal become time-consuming
Solution Approach 1:
Shear rams are designed as separable components with distinct upper and lower portions that can be independently handled. The upper shear ram portion can be removed through the door opening after the door assembly is opened, allowing rapid replacement without time-consuming complete disassembly. This segmentation directly addresses the time loss issue while maintaining installation effectiveness.
Solution Approach 2:
The door assembly is pre-configured with hinge mechanisms and opening pathways that facilitate quick access to ram blocks. By preparing the access mechanism in advance through the hinged door design, the system enables rapid deployment and replacement operations, reducing overall maintenance time while maintaining pressure control functionality.
3Reliability
If a hinged door assembly is added for easy access, then maintenance safety is improved, but device complexity increases
Solution Approach 1:
The door assembly serves multiple functions: it provides safe access during maintenance, maintains pressure containment during operation, and facilitates rapid ram block replacement. By consolidating these functions into a single hinged door mechanism rather than adding separate systems, the complexity increase is minimized while achieving improved maintenance safety and operational reliability.
Data Source
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AI summary
A blowout preventer (BOP) for controlling pressure within a wellbore includes an internal cavity (406) and a front side (202) including a door opening (400), the door opening (400) providing access to the internal cavity (406). The BOP also includes a door assembly (206) associated with the door opening (400). The door assembly (206) includes a door (208), movable between a first position and a second position. The door assembly (206) also includes a hinge (210) coupled to the door (208) to facilitate movement of the door (208) between a first position and a second position. The door assembly (206) further includes a coupling device (226) associated with the door (208), the coupling device (226) securing the door (208) to the front side (202). The BOP also includes a back side (204) including an outlet (300), the outlet being fluidly coupled to the internal cavity (406).