Blowout Preventer (BOP)
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This page explains how Annular Preventer is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A critical sealing component within a Blowout Preventer (BOP) stack that forms a seal around drill pipe, casing, or open hole to contain wellbore pressure.
Technical details and manufacturing context for Annular Preventer
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Working Pressure | 14–140 MPa | Higher pressure requires heavier constructionAPI 16A |
| Bore Size | 179–540 mm | Must match BOP stack sizeAPI 16A |
| Sealing Element Inner Diameter | 76–527 mm | Accommodates pipe sizes from drill pipe to casing |
| Operating Temperature Range | -29–121 °C | Elastomer limits; outside range may cause seal failureAPI 16A |
| Closing Pressure | 10.5–21 MPa | Required to energize the sealAPI 16A |
| Opening Pressure | 7–14 MPa | Ensures full retraction of the packing unitAPI 16A |
| Sealing Element Material | NBR, HNBR, FKM | Select based on wellbore fluid compatibilityASTM D2000 |
| Body Material | ASTM A487 4A, 4B, 5A | High-strength low-alloy steel for pressure containmentASTM A487 |
| Weight | 1.5–15 t | Increases with pressure rating and bore size |
| Overall Height | 0.8–2.5 m | Critical for BOP stack clearance |
| Control System Pressure | 21–35 MPa | Hydraulic supply for closing and openingAPI 16D |
| Sealing Element Service Life | 50–200 cycles | Depends on pressure, temperature, and wellbore conditions |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 15,000 psi (103 MPa) working pressure, 22,500 psi (155 MPa) test pressure |
| other spec: | Flow rate: 0-500 GPM (0-1,893 L/min), Slurry concentration: Up to 20% solids by weight, Seal closure time: <30 seconds |
| temperature: | -20°C to 120°C (operating), -40°C to 150°C (storage) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
Manufacturer profiles associated with Annular Preventer.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
The annular preventer provides a flexible, pressure-tight seal around various tubulars (drill pipe, casing, wireline) or seals the open borehole to contain wellbore pressure and prevent blowouts.
Unlike ram preventers that require specific pipe sizes, the annular preventer can seal around irregular shapes and a range of pipe sizes, making it a versatile first line of defense.
Typical rated working pressure ranges from 14 to 140 MPa, and bore size from 179 to 540 mm, per API 16A. These are reference ranges; confirm for your specific model.
Sealing element materials include NBR, HNBR, or FKM. Body material is typically high-strength low-alloy steel per ASTM A487 grades 4A, 4B, or 5A. Verify with the manufacturer.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
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