This article is written for Wellhead Control Head used in oilfield API 6A high-pressure flowline, wellhead and manifold service. The product should be confirmed by its real oilfield service position, not only by a short catalogue name. For API oilfield equipment, the useful specification combines pressure rating, nominal size, end connection, service condition, material or seal requirements, and inspection documents.
The wellhead control head is an important supporting device for wellhead sealing and pressure control in high-pressure oil and gas well operations. Product configurations include Top-Pull Type Wellhead Control Head and Bottom-Pull Type Wellhead Control Head, which can be selected according to different wellhead operating methods and field service conditions.
Rated working pressure ranges from 6,000 psi (42 MPa) to 15,000 psi. Specifications/models include 2 in, 2½ in, and 3 in, with special specifications available according to field wellhead size and operating requirements. Service conditions include standard service and H₂S service environments; sour-service products meet NACE MR0175 requirements and can be used in high-pressure wellhead operations and related pressure-control systems.
For API-style oilfield equipment, documents are part of the supply scope. MTC, pressure test report, NDT record, dimensional check and third-party inspection requirements should be confirmed before shipment.
Key points to confirm
For Wellhead Control Head, we normally recommend confirming the following items before quotation, production or replacement.
- Applicable standard or project requirement: API 6A.
- Working pressure, test pressure, nominal size and bore requirement.
- End connection type, mating equipment, flow direction and installation space.
- Service condition such as standard service, NACE sour service or low-temperature service.
- Required documents such as MTC, pressure test report, NDT report and third-party inspection.
Field use and inspection
Wellhead Control Head should be checked as part of the complete high-pressure system. Sealing surfaces must be protected, connections should be clean before make-up, and the product should not be forced into alignment by side load, hammering or pulling. If leakage, abnormal operation or pressure-test instability occurs, the model, pressure, medium, photos and test conditions should be recorded for technical review.
Information for quotation
For new projects, please provide the line layout, operating pressure, medium, temperature, connection standard and document requirements. For replacement work, old-part photos, nameplate or body markings, end-connection close-ups and installation position help us confirm the correct Wellhead Control Head quickly.