Russia-based steel pipe producer ChTPZ Group has announced that its subsidiary Pervouralsky Novotrubny Works (PNTZ) has delivered 104.7 mt of 139.7 mm x 10.54 mm casing pipes with gas-proof, first-generation ChT-VC Premium threaded joints to Gazprom Dobycha Nadym, a subsidiary of Russian gas monopoly Gazprom.
Based on customer specifications, the cold-resistant pipes were provided in two strength grades, E (90 mt) and P110 (14.7 mt). The first shipment of a pilot batch was sent to Gazprom's natural gas deposits in 2014. After the trial runs were successfully completed, Gazprom placed an order for more. The pipes were made at PNTZ Finishing Center under the supervision of an independent inspecting body in March this year.
The cold-resistant casing pipes with ChT-VC threaded joints are meant for fortifying a well in order to prevent inflow of fluids and collapsing. The pipes will still work even when the outside temperature is down to 60 degrees centigrade.
ChT-VC Premium threaded joints were designed and patented by ChTPZ Group in 2009, with the design being improved in 2012.