Multi-Metallic BOP Ram Fabrication by HIP Diffusion Bonding
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Solution Overview
Problem
Existing blowout preventer (BOP) rams in oil and gas drilling operations face limitations in material properties and manufacturing efficiency, particularly when using traditional subtractive manufacturing techniques that require multiple thermal processing steps and welding, which are time-consuming and costly.
Innovation Solution
A hot isostatic pressing (HIP) fabrication process is used to combine different metal alloys in a canister, forming multi-metallic rams with diffusion bonds at the interface, allowing for varied material properties in different portions of the ram, such as higher strength in the blade area and toughness in the body, without the need for extensive machining or welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional subtractive manufacturing techniques are used to fabricate BOP rams, then the structural integrity and material properties can be controlled, but the manufacturing process becomes time-consuming and costly due to multiple thermal processing steps and welding
Solution Approach 1:
The patent combines multiple manufacturing operations (forming, thermal processing, welding) into a single hot isostatic pressing operation. Different metal alloys are placed in a canister and processed simultaneously under controlled temperature and pressure, consolidating what would traditionally require multiple separate steps into one integrated process.
Solution Approach 2:
The invention uses composite material construction by incorporating multiple metal alloys within a single canister during the HIP process. This allows different portions of the final component to have different material properties (e.g., higher strength in the blade area, toughness in the body) while being manufactured as one piece without traditional welding.
2Adaptability or versatility
If multiple metal alloys are combined using traditional welding methods, then varied material properties can be achieved in different portions of the ram, but the process complexity and time required increase significantly
Solution Approach 1:
The canister is divided into separate compartments or sections, each containing different metal alloys. This segmentation allows each alloy to be positioned in its desired location within the final component while being processed simultaneously. The segmentation is maintained through the HIP process, resulting in distinct material zones without requiring post-processing welding.
Solution Approach 2:
The different metal alloys are pre-positioned in their final locations within the canister before the HIP process begins. This preliminary arrangement eliminates the need for subsequent welding or assembly operations, as the alloys are already in their intended positions and will bond together during the single HIP operation.
3Manufacturing precision
If extensive machining is performed after traditional manufacturing, then precise dimensional control is achieved, but the manufacturing cost and time increase
Solution Approach 1:
The HIP process uses precisely controlled temperature and pressure parameters to achieve the desired material properties and dimensional accuracy directly during manufacturing. By optimizing these parameters, the process eliminates or reduces the need for subsequent machining operations, achieving both precision and time efficiency.
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 HIP process reduces manufacturing time and cost while enabling a broader range of material properties, such as strength, toughness, and corrosion resistance, and allows for complex shapes in pressure-controlling components, enhancing the performance of BOP rams.
Implementation Method 1
a diffusion bond at an interface between the first metal alloy and the second metal alloy that joins the first metal alloy to the second metal alloy within the multi-metallic ram
Implementation Method 2
A hot isostatic pressing (HIP) fabrication process is used to combine different metal alloys in a canister
Data Source
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AI summary
A multi-metallic pressure-controlling component and a hot isostatic pressure (HIP) manufacturing process and system are disclosed. An example multi-metallic ram includes a first portion formed from a first metal alloy, a second portion formed from a second metal alloy, and a diffusion bond at an interface between the first metal alloy and the second metal alloy that joins the first metal alloy to the second metal alloy within the multi-metallic ram.