Drill Pipe Flats for Multi-Rig Compatibility and Wear Separation
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Solution Overview
Problem
The existing drill string elements require multiple types to accommodate different drill rig manufacturers, leading to logistical challenges in handling and storage due to the need for specific flats to match the gripping tongs of each rig, limiting versatility and increasing wear.
Innovation Solution
The drill string element features at least two flats along its length with different diameters, positioned at varying distances and rotated relative to each other to accommodate multiple drill rig manufacturers, reducing wear and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drill string element has a single flat configuration, then it can be used with a specific drill rig manufacturer's gripping tong, but it cannot be used with drill rigs from other manufacturers
Solution Approach 1:
The drill string element is designed with multiple flats of different diameters along its length, enabling a single element to be compatible with gripping tongs from multiple drill rig manufacturers. The element can be engaged by different tongs at different locations, making it universally applicable across different rig systems without requiring separate element types for each manufacturer.
Solution Approach 2:
The drill string element is divided into multiple sections along its length, with each section containing a flat of a specific diameter. This segmentation allows different portions of the element to serve different compatibility functions, with each flat potentially matching a different gripping tong size from different manufacturers.
2Adaptability or versatility
If a drill string element has multiple flats of different diameters, then it can be used with multiple drill rig manufacturers, but the structural complexity of the element increases
Solution Approach 1:
Different sections of the drill string element have locally optimized properties - specifically, different flat diameters at different locations along the element's length. Each local region is tailored to accommodate specific gripping tong sizes, with the flat diameter and position optimized for compatibility with particular drill rig manufacturers while maintaining overall element integrity.
3Length of moving object
If a drill string element has flats positioned close to each other, then the element length is reduced, but wear patterns overlap reducing the element's lifespan
Solution Approach 1:
The flats are positioned at predetermined intervals along the element, with spacing calculated in advance to prevent wear overlap. This preliminary arrangement of flat positions ensures that during operation, the wear zones from different flats remain separate, extending the element's service life before replacement is needed.
Data Source
AI summary
A drill string element for rotary drilling includes a threaded connection at a forward and/or a rearward end of the drill string element; a central flushing channel extending longitudinally through the drill string element; and a first flat and a second flat positioned along an outer surface of the drill string element closest to the threaded connection. Each flat includes at least two flattened sections on diametrically opposite sides of the drill string element, wherein the first flat and the second flat have different diameters to accommodate gripping tongs of different diameters.