Continuous oil pipe steel strip butting technique

The invention relates to a continuous oil pipe steel strip butting technique. The technique comprises the following steps: respectively cutting butt ends of two steel strips into a 45-degree end face, and polishing to remove rust; polishing end faces on two tab plates tangent to the steel strips to remove rust; aligning and compacting the butt ends of the steel strips, and spot-welding the butt ends of the steel strips by manual TIG welding to form a butt joint; respectively putting the tab plates on the head and tail of the butt joint of the steel strips, abutting the polished end faces of the tab plates against the two sides of the steel strips, and spot-welding the polished end faces of the tab plates by manual TIG welding for being fixed on the head and tail of the butt joint of the steel strips; carrying out backing welding by using a PLASMA welding technique; carrying out cosmetic welding by using the TIG welding technique; carrying out thermomechanical treatment on the butt joint; and removing the tab plates on the two sides of the welding seam. The invention combines the TIG welding technique with the PLASMA wire-filling welding technique, so that the welding seam has favorable toughness and plasticity. The invention enhances the fatigue strength of the continuous pipes, and prolongs the service life of the continuous pipes. The continuous oil pipe product has the advantages of stable performance and good quality.