How to strengthen surface protection of non-magnetic drill collars through process improvement


release time:2025-07-24

source: network

1. By selecting materials for welding high-quality wear-resistant bands, the wear-resistant bands should have both high hardness, high wear resistance, and wear resistance that matches the casing to avoid excessive wear of the casing.
2. Certain process requirements: such as stable welding process and smooth wire feeding; Wear resistant tape size standard (width 30-35mm, height 2.4-4.0mm); Less surface residue, no biting edges, and smooth edges; The magnetic permeability of the welding wire meets the non-magnetic requirement.
3. Reasonable maintenance cycle: When the thickness of the wear-resistant strip is less than 0.6mm, it needs to be re welded and repaired.
4. Control welding hot cracking and nitrogen loss: Non magnetic drill collars are prone to hot cracking and nitrogen loss during welding. It is necessary to optimize process parameters (such as preheating temperature and welding speed) to ensure that the weld structure is stable austenite and avoid deformation martensite.

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