Procurement of Welding of Production pipe and Demagnetization

Description

The scope of delivery is per well (3 wells in total) comprised of: •During removal of the 9 ⅝" production string, separate the pipes •Prepare the used 9 ⅝" pipe ends with weld seam according to API 5L •Demagnetize pipes for welding •Detailed description of the planned procedure for cutting, prepare and demagnetization of the used pipes •Welding of all connections within 9 ⅝" gas production string; depth approx. 1,000 m •All welded pipe connections have to be examined 100% with magnetic ultrasonic and x-ray tests. •All C-rings have to be examined 100 % NDT (Magnetic). •The contractor has to deliver a detailed description of the welding procedure of pipes (heat treatment, etc.) and the certificates of the welders prior to starting the work. •A welding supervisor has to be available on site in accordance with DIN EN ISO 14731 (welding coordination - task and responsibilities). •A welding test for the casing including the corresponding destructive examinations has to be performed. Lot 1: The Contracting Authority wants to purchase the provision of pipe cutting service including demagnetization, welding services including technical equipment, non-destructive inspection of the welds and the corresponding personnel involved during the cutting, preparation and welding of the 9 ⅝ʺ production string. The welding services will be needed for three wells (To-8, To-9, To-6).