CASING

CASING

Sigma offers the complete range of API Casing, including Extreme Line connections and Threaded and Coupled (with API 8 Round Short or Long Thread or Buttress connection), ranging from sizes 4 1/2” OD to 13 ⅜” OD in all grades according to API Specification 5CT, and also Premium Connections.

The first-quality steel used in the manufacturing process is performed with the highest degree of accuracy to meet or exceed API Specifications as well as the industry standards.

Plain End Pipes and Coupling Stocks in a green condition (un-heat treated) are ordered to specific metallurgical chemistries and dimensional requirements as per Sigma metallurgical specifications from reputed API Approved Mills only.

Plain End Pipe is upset (for Extreme Line Casing only) and heat-treated by the Quench and Temper process. Each Heat Lot is tested for mechanical properties. The heat-treated Casing is 100% inspected non-destructively prior to threading. The Coupling Stock follows the same process prior to threading.

The threading on the Pipe and the Couplings is done on CNC machines, and 100% gauging of all the critical dimensional parameters is done and recorded as part of the manufacturing records. The finished Couplings are given anti-galling treatment (Zinc or Manganese) prior to Buck-on Operation.

The Couplings are Bucked-on to the pipe at their specific designed buck-on torques which are recorded.

All Casings are subjected to Hydrostatic Testing as required by API Specifications.

The finished Casings are externally coated with rust preventive varnish and attached with Thread Protectors prior to shipment.

Maximize Recovery:Our solutions are designed to enhance the recovery of resources, ensuring optimal utilization of reservoir potential.