CAMTOP 11″ 5M WP Annular BOP — API SPEC 16A large-bore spherical blowout preventer. 11-inch bore, 5,000 psi working pressure, NACE MR-0175 compliant. Shaffer-style interchangeable design with only 5 major components. Sealing range 0″ to 11″. R54 flanged/studded connections.
11″ 5M WP Annular BOP | API 16A | 5,000 PSI | CAMTOP
Description
11″ 5M WP Annular BOP 环形防喷器
API SPEC 16A | 11″ Bore | 5,000 PSI Working Pressure | NACE MR-0175
Product Overview
The 11″ 5M WP Annular BOP is a large-bore spherical blowout preventer designed and manufactured to API SPEC 16A standards. With an 11-inch bore and 5,000 psi working pressure rating, it provides reliable well control for big-bore drilling and completion operations. The compact spherical design features only five major components and a fully interchangeable sealing element for simplified maintenance. The product is structurally equivalent to Shaffer-style annular BOPs with fully interchangeable seals.
Bore: 11″ (279.4 mm) | Working Pressure: 5,000 psi | Test Pressure: 7,500 psi | Weight: 9,634 lb (4,370 kg) | Standard: API SPEC 16A / NACE MR-0175
Product Image
CAMTOP 11″ 5M WP Annular BOP — Large-bore Shaffer-style spherical design with interchangeable sealing element
Assembly Drawing
CAMTOP 11″ 5M WP Annular BOP General Assembly Drawing — For reference only
Key Features
- API SPEC 16A Compliant: Designed and manufactured to international standards for annular blowout preventers
- 5,000 PSI Working Pressure: Rated for 5,000 psi with 7,500 psi hydrostatic body test pressure
- 11-Inch Large Bore: Full 11-inch through-bore for big-casing drilling and completion programs
- Shaffer-Style Interchangeable Design: Structurally equivalent to Shaffer annular BOPs with fully interchangeable sealing elements
- NACE MR-0175 Compliant: Suitable for H2S sour service environments with appropriate material selection
- Ni-Based Alloy 625 Ring Grooves: All ring grooves welded with nickel-based alloy 625 for superior corrosion resistance
- Wear Ring Protection: Moving parts equipped with wear rings to prevent metal-to-metal contact and extend BOP service life
- Easy Seal Element Replacement: Sealing element can be replaced without disassembling hydraulic connections
- 5 Major Components Only: Simplified assembly reduces maintenance complexity and improves reliability
- Full Bore Sealing Range: Seals on pipe sizes from 0 to 11″ for maximum operational flexibility
- R54 Studded Top / Flanged Bottom: API standardized connections for big-bore wellhead integration
- T-20 Temperature Rating: Metal rated -29°C to +121°C; BA-rated non-metal seals for -18°C to +82°C
Technical Specifications
| Item | Specification |
|---|---|
| Model | 11″ -5M WP Annular BOP |
| Nominal Bore | 11″ (279.4 mm) |
| Working Pressure | 5,000 psi (34.5 MPa) |
| Hydrostatic Test Pressure | 7,500 psi (51.7 MPa) |
| Top Connection | 11″ -5,000 psi R54 Studded |
| Bottom Connection | 11″ -5,000 psi R54 Flanged |
| Piston Stroke | 6.19″ (157.2 mm) |
| Open Chamber Volume | 14.59 gal (55.2 L) |
| Close Chamber Volume | 18.67 gal (70.7 L) |
| Hydraulic Control Pressure | ≤ 1,500 psi (10.3 MPa) |
| Hydraulic Connection | NPT 1″ |
| Sealing Range | 0 ~ 11″ |
| Overall Dimensions | 44.75″ x 44.75″ x 41.50″ (1,137 x 1,137 x 1,054 mm) |
| Net Weight | 9,634 lb (4,370 kg) |
| Design Standard | API SPEC 16A / API SPEC 16E |
| Sour Service | NACE MR-0175 / ISO 15156 Compliant |
| Temperature Rating (Metal) | T-20: -29°C to +121°C |
| Temperature Rating (Non-Metal) | BA: -18°C to +82°C |
Material Specifications
| Component | Material |
|---|---|
| Pressure-Containing Parts (Housing, Upper Housing, Piston) |
Low Alloy Steel (Qualified Casting) |
| Studs | AISI 4142 (42CrMo) Alloy Steel |
| Nuts | AISI C1045 (45) High Carbon Steel |
| Ring Groove Overlay | Nickel-Based Alloy 625 Stainless Steel Welding |
| Sealing Element Elastomer | Long-Life Nitrile (BA Rating) — Shaffer-Interchangeable |
Main Components
| Component | Description |
|---|---|
| Upper Housing / Cover | Top pressure-containing housing with API R54 studded connection; low alloy steel casting with Ni-625 ring groove overlay |
| Body / Lower Housing | Main body with API R54 flanged bottom connection; includes NPT 1″ hydraulic ports and lower wear ring |
| Sealing Element (Packer) | Steel-reinforced nitrile elastomer sealing element with a 0″ to 11″ sealing range; Shaffer-interchangeable design — rated for hundreds of full WP cycles |
| Adapter Ring | Steel adapter ring for uniform force distribution around the sealing element during closure |
| Piston | Hydraulic piston with 6.19″ stroke; equipped with upper/lower seals and wear ring for 5,000 psi operation |
| Studs & Nuts | Heavy-duty AISI 4142 alloy steel studs with AISI C1045 nuts for body-head connection integrity |
| Lifting Shackle | Top-mounted lifting shackle for rig handling of the 9,634 lb unit |
| Wear Rings (3 sets) | Upper housing, lower housing, and piston wear rings prevent metal-to-metal contact |
Spare Parts List
| Part | Qty |
|---|---|
| Sealing Element (Packer) | 1 |
| Adapter Ring Set | 1 |
| Upper Piston Seal | 1 |
| Lower Piston Seal | 1 |
| O-Ring Set | 1 set |
| Upper Housing Wear Ring | 1 |
| Lower Housing Wear Ring | 1 |
| Piston Wear Ring | 2 |
| Pipe Plug NPT 1″ | 2 |
Applications
- Big-bore onshore and offshore drilling rigs requiring 11-inch annular blowout prevention
- Large-casing drilling programs with 9-5/8″ and larger casing strings
- Stripping operations with large-diameter tubulars under pressure
- Completion and workover operations with big-bore wellhead configurations
- Sour service (H2S) environments with NACE MR-0175 compliance
Why Choose CAMTOP?
- API SPEC 16A compliant design and manufacturing with full traceability
- ISO 9001 certified quality management system
- Shaffer-style interchangeable design for proven reliability and global parts availability
- Complete documentation package: material certificates, NDE reports, pressure test records, and operation manuals
- All ring grooves welded with Ni-based Alloy 625 for long-term corrosion protection
- Competitive factory-direct pricing with global shipping
- Technical support including installation guidance and maintenance training
Contact Us
Email: sales@cposl.com
Phone: 86-18621723891
Web: www.camtop-oilfieldtools.com
Address: No. 432, Fute North Road, Pudong District, Shanghai, China
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