Casing couplings

Purpose

The couplings are intended to connect casing pipes used in construction of oil and gas wells and are manufactured as per GOST 632-80 with OTTM and OTTG threads, as well as BUTTRESS threads as per TU 14-ZR-29-2007. Premium class casing pipe couplings with patented thread TMC-OTV, TMC1-SRV, TMC1-SRV2 are used in complex-profile oil and gas wells, requiring enhanced performance, as well as for extraction of super-viscous oil by steam-assisted gravity drainage.

Field of application

• High-strength, high-hermetic threaded joint TMC-OTV is used in oil and gas wells of complex profile, as well as wells where coolant is transported at temperatures up to 482 °F. The unique design consists in sealing of the threaded joint due to interference contact at the pin toroidal seal band with the tapered bore in the box.
• High-strength, high-hermetic threaded joint TMC1-SRV provides high make-up torque (up to 20.283 lbsf-ft), maintaining tightness under the action of combined tensile loads (up to 379.9 kipf), compression (at least 80%) and internal hydraulic pressure (up to 5.076 ksi) due to mating the threaded profile and two thrust elements "metal-to-metal".
  
• The high-strength, high-hermetic threaded joint TMC1-SRV2 is characterized by high compression, tension and bending capacity and meets the requirements level of CAL IV (the highest level of connection application) of GOST R ISO 13679-2016 (analogue of ISO 13679:2002 Petroleum And Natural Gas Industriesprocedures For Testing Casing And Tubing Connection), which confirms the possibility of its use in the most difficult conditions of oil production. Furthermore, a feature of the TMC1 SRV2 threaded connection is that it can be assembled on an inclined rig mast.
  

Advantages

• Production of couplings with premium threads of in-house design.
• Production of couplings according to specific requirementsof the customer.