FIELD: drilling equipment, particularly for threaded drilling string connection.
SUBSTANCE: method involves performing friction welding; removing surface burrs; performing normalizing and surface strengthening operations. Before welding similar borings are created at tubular member ends. Bush is pressed in one boring. Another bush end is slidably installed in opposite boring. Ratio between bush length and boring length is 1.2-1.5. Ratio between bush wall thickness and ready bored end walls thickness is 0.3-0.8. Surface strengthening is performed by quenching the article for depth equal to 35-50% of bored tubular member end wall thickness.
EFFECT: increased uniformity of welded seam strength and pipe body subjected to surface hardening.
2 dwg, 1 ex
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