This article is written for Well Test Choke Manifold used in oilfield high-pressure manifold and pressure-pumping 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 well-test choke manifold is installed downstream of the flowhead to control the surface flow rate and downstream pressure during a production or deliverability test. Fixed or adjustable chokes provide the pressure drop; dedicated pressure and temperature take-offs supply instruments used for test data acquisition.
The listed manifold uses flanged connections and slab gate valves. Nominal bore ranges from 2 1/16 in to 4 1/16 in. Suitability for continuous duty, erosive fluids, sour service and the stated -29 °C to 121 °C range must be confirmed for the documented valve trim, pressure-containing materials and seal configuration; API temperature classes P and U must not be merged into one designation. For sour service, wetted metallic materials are selected for the specified environment in accordance with NACE MR0175/ISO 15156.
In field layouts, the first question is where the component sits in the pressure path and what equipment it must connect to. The answer affects connection direction, pressure class, access for operation and future maintenance.
Key points to confirm
For Well Test Choke Manifold, we normally recommend confirming the following items before quotation, production or replacement.
- Applicable surface well-test and project specification; identify any API Spec 6A valve/interface requirements separately. Do not assume API Spec 16C applies to the complete well-test manifold.
- Working pressure, test pressure, nominal size and bore requirement.
- End connection type, mating equipment, flow direction and installation space.
- Service condition: standard, low-temperature or sour service; for sour service, provide the environmental limits needed for NACE MR0175/ISO 15156 material selection.
- Required documents such as MTC, pressure test report, NDT report and third-party inspection.
Field use and inspection
Well Test Choke Manifold 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 Well Test Choke Manifold quickly.