FIELD: mining industry, particularly for oil and gas extraction from underground formation, namely to join drill pipe sections with the use of strut included in threaded pipe connection.
SUBSTANCE: metal item forming method involves mechanical deforming metal strip, for instance slotted strut formed of alloy selected from group containing Cu/Be, Cu/Sn, Cu/Ni, Cu/Ni/Sn, Cu/Zn, Cu/Si, Ni/Cr, Cu/Al, Al/Ti, Al/Mg, Al/Zn to obtain formed blank including hollow section made as truncated cone without helical slot; mechanical deforming conical section to form helical slit in it.
EFFECT: prevention of plastic threaded connection deformation, increased reliability of drill pipe connection, simplified strut production technology.
34 cl, 9 dwg
