Product Introduction
Casing heads are critical wellhead components used in drilling operations to control wellhead pressure. They are typically welded or threaded onto the top of the conductor or surface casing, forming an integral part of the wellhead system.
In conventional wellhead assemblies, the casing head is the lowest component and serves as the foundation for all subsequent wellhead and completion equipment.
Key Features
- Straight bore bowl with 45° landing shoulder – protects sealing surfaces from drilling tool damage and prevents wedging of test plugs and bowl protectors under pressure.
- Side outlets available in threaded and studded configurations; custom designs available on request.
- Bottom connections offered in threaded or slip-on welded designs.
Technical Specifications
| Category | Specifications / Options |
| Standard | API Spec 6A, NACE MR0175 |
| Pressure Rating | 2000 psi, 3000 psi, 5000 psi, 10000 psi |
| Nominal Bore | 7-1/16", 9", 11", 13-5/8", 16-3/4", 18-3/4" |
| Material Class | AA, BB, CC, DD, EE, FF |
| Temperature Class | K, L, N, P, S, T, U, V |
| Product Specification Level (PSL) | PSL 1, PSL 2, PSL 3, PSL 3G, PSL 4 |
| Top Connection | API Flange (6BX/6B), Studded |
| Bottom Connection | Slip-on Welded, Threaded, Butt-weld |
| Side Outlet Type | Threaded (LP/BP), Studded Flange, Flanged |
| Casing Hanger Type | Slip Type, Mandrel Type (Threaded) |
| Seal Type | Primary Seal (BT Seal), Secondary Seal (W Seal) |
Primary Functions
- Provides a secure connection to the surface casing string.
- Supports and seals the next casing string, typically the first intermediate casing.
- Offers annulus access outlets for fluid monitoring and returns.
- Supports the blowout preventer (BOP) stack during drilling operations.
