Electromagnetic Clearance Joint Assembly with Segmented Mandrel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of existing electromagnetic clearance joints is prone to human errors, leading to unqualified products due to complex and labor-intensive processes, which affects the reliability and efficiency of drilling operations.
Innovation Solution
The electromagnetic clearance joint comprises a mandrel and a shell with specific structural features, including helical threads and ridges, that facilitate a simple and accurate assembly process using positioning threaded holes, assembly spaces, and corrugated pipe-shaped structures, which are filled with insulating material to enhance insulation and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded clearance joint is assembled using overlapping spiral threads, then electrical insulation is achieved, but the assembly process becomes complex and labor-intensive leading to human errors
Solution Approach 1:
The clearance joint is divided into separate mandrel and shell components with distinct functional features. The mandrel contains internal threads and positioning grooves, while the shell has external threads and corresponding ridges, allowing independent manufacturing and simplified assembly
Solution Approach 2:
The joint incorporates self-positioning features including protrusions that fit into grooves, ridges that align with corresponding features, and threaded connections that automatically guide assembly. These features eliminate the need for complex alignment procedures and reduce human error
2Manufacturing precision
If traditional clearance joint assembly methods are used, then electrical isolation is achieved, but assembly accuracy and symmetry are difficult to guarantee
Solution Approach 1:
The joint uses asymmetric positioning features such as protrusions fitting into specific grooves, and ridges aligned at particular angles, to guarantee precise orientation and symmetry during assembly. This asymmetric design ensures correct alignment without requiring complex measurement and adjustment procedures
Solution Approach 2:
The mandrel and shell are designed with pre-formed positioning features including grooves, ridges, and threaded holes that are manufactured with high precision beforehand. These pre-prepared features guide the assembly process and ensure accurate alignment and symmetry when the components are joined
Data Source
AI summary
An electromagnetic clearance joint and an assembly method thereof are provided, the joint includes a mandrel and a shell. An inner diameter of the shell is larger than an outer diameter of the mandrel, the mandrel includes a first structure part and a second structure part which are connected to each other, and the shell includes a third structure part and a fourth structure part which are connected to each other. A plurality of acting grooves are evenly and circumferentially distributed around the first structure part. An outer diameter of the first structure part is gradually reduced, a plurality of annular ridges are sequentially distributed axially on the outer surface of the second structure part and form the ridge structures, a plurality of grooves axially extending are arrayed circumferentially on the outer surface of the second ridge structure.