Product Introduction
Our BOP closing unit parts lineup includes two core categories: accumulator recertification components and hydraulic-pneumatic system repair parts. Crafted from high-grade nitrile elastomers, 316 stainless steel, carbon steel, and PTFE backup materials, each component undergoes pressure testing, material certification, and dimensional verification to meet strict API and DNV requirements. This comprehensive selection covers all critical wear parts for accumulator servicing, pump repairs, and valve maintenance, making it the definitive sourcing solution for BOP closing unit maintenance, recertification, and emergency repairs.
Functional Capabilities
- Accumulator Pressure Retention: 11-gallon nitrile bladders, anti-extrusion rings, and multi-type seals maintain stable 3000 PSI gas pressure, ensuring rapid BOP actuation when needed.
- Pneumatic/Hydraulic Pump Repair: Complete repair kits for SUPER 60 pneumatic pumps and UNION 25GPM triplex pumps restore fluid delivery pressure for reliable BOP closing operation.
- Valve Control & Sealing: 2/3-position 4-way rotary valves and repair kits regulate fluid flow, while air cylinder and regulator kits maintain consistent pneumatic control.
- Leak Prevention: Nitrile O-rings, PTFE backups, and metal backup rings create high-pressure, corrosion-resistant seals to prevent gas/fluid leakage in accumulators and control valves.
- Safety & Compliance: DNV-certified anti-extrusion rings and 316 stainless steel hardware meet global well control safety standards for BOP system recertification.
- System Maintenance: Pre-assembled accumulator repair kits streamline recertification, including all required bladders, seals, and valves for efficient on-site servicing.
Structural Design Features
- High-Pressure Durability: All components rated for 3000 PSI working pressure, engineered to withstand pressure cycling and extreme well control conditions.
- Corrosion Resistance: 316 stainless steel metal backups and carbon steel hardware resist rust and degradation in harsh offshore/onshore drilling environments.
- Precision Sealing: Nitrile elastomers and PTFE backup rings prevent extrusion and leakage, even under continuous high-pressure gas/fluid exposure.
- OEM-Compatible Fit: Exact dimensional matching for standard 11-gallon accumulators, SUPER 60 pumps, and rotary valves enables quick, tool-free installation.
- Recertification-Ready Kits: Pre-packaged accumulator repair kits include all required parts, reducing part shortages and speeding up mandatory BOP recertification.
Applicable Operating Conditions
These BOP closing unit components are engineered to perform reliably in rigorous well control scenarios, including:
- Standard BOP closing units with 11-gallon 3000 PSI bladder accumulators
- SUPER 60 pneumatic pumps, UNION 25GPM triplex pumps, and 2/3-position 4-way rotary valves
- Onshore and offshore drilling rig well control systems
- Temperature range: -20°F to 250°F (-29°C to 121°C) for elastomer seals
- Mandatory BOP accumulator recertification, routine maintenance, and emergency well control repairs
Maintenance & Service Recommendations
- Inspect accumulator bladders and anti-extrusion rings every 6 months for cracks, swelling, or wear; replace components during mandatory recertification to maintain 3000 PSI pressure integrity.
- Lubricate pneumatic pump seals and rotary valve components with approved high-pressure hydraulic fluid during repairs to ensure smooth operation.
- Test accumulator pressure and check for leaks quarterly using calibrated pressure gauges; replace faulty charging valves or O-rings at the first sign of pressure loss.
- Overhaul pneumatic/hydraulic pumps annually using complete repair kits to prevent fluid delivery failure and maintain consistent BOP actuation speed.
- Store elastomer seals (nitrile O-rings, bladders) in a cool, dark, dry environment to prevent premature degradation from UV light and extreme temperatures.
- Verify DNV and API certification labels on all components prior to installation to ensure compliance with well control safety regulations.
- We supply the following spare parts:
| ITEM | DESCREPTION | UNIT |
| Parts For Recerificate Accumlators | ||
| 1 | 11Gallon, 3000 PSI, Bladder Assembly Nitirle Bladder | EA |
| 2 | Anti-Extrusion Ring, / F 2.5-11 Gallon, Carbon Steel, Nitrile, DNV | EA |
| 3 | Hex Jam Nut | EA |
| 4 | Valve Guard | EA |
| 5 | O-Ring, Nitrile | EA |
| 6 | O-Ring Back Up, Nitrile | EA |
| 7 | METAL BACK-UP, 316 STAINLESS, PER DWG: MB10-2 REVA | EA |
| 8 | Locknut, Port | EA |
| 9 | Spacer, 3000 psi | EA |
| 10 | Plug, Bleeder Port (¼” NPT) | EA |
| 11 | Valve Cap | EA |
| 12 | Valve, Core | EA |
| 13 | Charging Valve Adapter | EA |
| 14 | O-Ring | EA |
| Sapre Parts and Shutdowen Items | ||
| 1 | Pneumatic Opreated Pumps_New Repair Kit_Model SUPER 60, 8 1/2″-4 NO’S | EA |
| 2 | Hydro-Pneumatic Pressure Switch_ New Repair Kit | EA |
| 3 | Triplex Pump_ New Repair Kit_Model UNION 25GPM-1 NO’S | EA |
| 4 | Complete set 2/3-Position 4-Way Rotary Valve | EA |
| 5 | 2/3-Position 4-Way Rotary Valve Repair Kit | EA |
| 6 | 3″ Air Cylinder Repair Kit | EA |
| 7 | Manual-pneumatic Regulator_ New Repair Kit | EA |
| 8 | Manual Regulator_ New Repair Kit | EA |
| 9 | Charging Kit | EA |
| 10 | Spare parts Accumulator Repair Kit Consists of: – 1 Ea Bladder 11G. – 2 Ea Anti-extrusion Ring ANXQ-00-08/09 – 1 Ea Gas Valve CQF-5 – 2 Ea Back-up Ring (PTFE) 90×2.5 – 3 Ea O-Ring |
Field Failure Repair Case Studies
Case 1: Accumulator Bladder Rupture & Pressure Loss
A BOP closing unit experienced sudden 3000 PSI pressure loss due to a ruptured 11-gallon nitrile bladder. Replacing the bladder, paired anti-extrusion rings, and sealing O-rings restored full pressure retention and BOP readiness.
Case 2: SUPER 60 Pneumatic Pump Failure
Worn internal seals in a SUPER 60 pneumatic pump caused insufficient hydraulic fluid delivery, delaying BOP actuation. Installing a complete pump repair kit replaced damaged seals and restored proper fluid pressure.
Case 3: Rotary Valve Leakage & Control Issues
A 2/3-position 4-way rotary valve developed internal fluid leakage, leading to inconsistent BOP control. Using the valve repair kit to replace seals and wear components eliminated leakage and restored precise flow control.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts certified for BOP accumulator recertification? | Yes, key components like anti-extrusion rings meet DNV standards, and all parts comply with API 16A requirements for mandatory BOP closing unit recertification. |
| What pressure rating do these accumulator parts support? | All accumulator components are rated for a maximum working pressure of 3000 PSI, designed exclusively for standard 11-gallon BOP accumulators. |
| Do the repair kits include all parts for full component servicing? | Yes, pre-assembled kits (accumulator, pump, valve) include every required seal, ring, and component to complete full repairs without additional part sourcing. |
Procurement Guidance
For well control teams and maintenance crews responsible for BOP closing unit safety and compliance, this catalog is your definitive sourcing solution for high-quality, certified spare parts. It provides full transparency on part descriptions, pressure ratings, certification standards, and compatibility details, serving as both a formal procurement compliance standard and a practical field troubleshooting reference for BOP system maintenance and recertification. Whether you need accumulator bladders and seals for mandatory recertification, pump repair kits for emergency fluid delivery fixes, or rotary valve components for control system repairs, every part is engineered to resolve common BOP closing unit failures and deliver reliable, compliant performance in critical well control scenarios. Submit your detailed inquiry with specific part types, required quantities, and BOP unit model details to secure precision-matched components tailored to your well control needs.
