The material to manufacture coupling is called the coupling stock. Each well should use several layers of casing according to different drilling depth and geological conditions.
Cement cementing is used after casing goes down. It is different from tubing and drill pipe. It can not be reused. It belongs to disposable consumable material.
Connection type: STC, LC, BC
Material: J55 K55 N80 L80 P110
Standards: API SPEC 5CT, API SPEC 5B
Product Surface: Phosphating treatment is used on the inner and outer surfaces.
Product packaging: cartons, wooden boxes, pallets or other packaging according to customer requirements.