Casing Heads

Manufactures tubing/casing heads, hangers and adapter Flanges in all sizes and pressure ratings. The casing head is the lowest part of the wellhead assembly and is always connected to the surface casing string. It supports subsequent drilling wellhead and completion equipment. Popular Adapter Flanges are double studded Adapter Flanges, Companion Flanges, and X Union Adapters. Customers may use Adapter Flanges for transition in nominal size and /or pressure rating. The Adapter Flanges have minimum overall heights, or customer specified thickness, consistent with design considerations. Tree caps are installed on top of Christmas Trees for quick access to the tubing bore-via Tester of Lubricator Adapter for bottom hole testing, installing back-pressure valves etc. Bottom Hole Test Adapters allow a flexible means of entry into the tubing bore. Bottom Hole Test Adapters are used where an integral flanged unit is preferred. These adapters are furnished in various sizes, and working pressure up to 20,000PSI.

Design Specification:
Standard Accessories are in accordance with API 6A 21th latest Edition, and use the right materials for different operating condition according to NACE MR0175 standard.
Product Specification Level: PSL1 ~4　　　 Material Class: AA~HH　Performance Requirement: PR1-PR2　Temperature Class: LU

Product Features:

◆ C-22 accepts C-21 non-automatic sealing casing hanger w/ type H seal ring, C-22 & C-122 automatic sealing casing hanger.
◆ C-22-BP-ET has bowl-protector lockdown screws in the top flange.
◆ C-22 eliminates the need for lockdown screws to retain bowl protectors.
◆ Bottom preparation can be either male-threaded, female-threaded,
◆ Supports blowout preventers while hole is drilled for next casing string.
◆ Provides for suspending and packing off the next casing string.
◆ Provides outlets for annular access.
◆ Provides for testing BOPs while drilling.

◆ Straight bowl prevents wedge-locking of bowl protectors, casing hangers and test plugs.
◆ Seal bore less likely to be damaged during drilling.
◆ Detachable base plate available for C-22 heads provides time savings
and adds value due to better utilization of customer-owned property.
◆ C-22-EG reduces number of leak paths, lowers cost and increases safety
as there is no need to work beneath the BOPs.