FH23-21NL Annular BOP Seals & OR5011500 O-ring

Introduction

In oilfield well control operations, annular blowout preventers (BOPs) and ram BOPs rely entirely on high-performance sealing components to maintain well integrity—any failure of seals, O-rings, or wear rings can lead to catastrophic well blowouts, environmental pollution, and costly unplanned downtime. The parts listed, including OR5011500 115X5.0 O-ring, PDD401250 Turcon Double Delta seal, FH3570 series seals (FH3570-08, FH3570-14-0), and C115-22 0145X0160X9/10 Rod seal, are precision-manufactured to fit specific BOP models and hydraulic systems. These parts are fully compatible with FH23-21NL annular BOPs, FH3570 series BOP assemblies, and various ram BOPs (equipped with H31 and H06 series components) commonly used by Honghua, Jereh, Weatherford, and NOV in onshore and offshore oilfields. Our product line targets three core user groups: well control maintenance teams needing reliable replacement seals for daily BOP inspections and emergency repairs, BOP operators requiring durable components to ensure tight sealing during well control operations, and procurement departments seeking standards-compliant, long-lasting spares that reduce maintenance costs and operational risks. The core purpose of these parts is to solve industry pain points—such as annular BOP seal leakage, piston wear, rod seal failure, and adapter ring seepage—ensuring the tight sealing and stable operation of BOP systems, preventing well fluid loss, reducing unplanned downtime, and helping operators comply with strict oilfield safety regulations. As critical components of BOPs, these seals directly protect personnel, equipment, and the environment, making them indispensable for safe oilfield operations.

Product Overview

We supply a comprehensive range of high-quality oilfield sealing components, covering O-rings, Turcon Double Delta seals, compact seals, backup rings, rod seals, combination sealing rings, wear rings, and adapter rings—all designed specifically for BOP systems and hydraulic control units. Key models include OR5011500 115X5.0 O-ring, PDD401250 Turcon Double Delta, FH3570-14-0 Combination Sealing Ring, C115-22 0145X0160X9/10 Rod Seal, and FH23-21NL Annular BOP适配 seals (PDD402100-T46N). All parts are manufactured in strict compliance with API 16A (for BOP components), API 16C (for well control equipment), GB/T 20425-2006 (for hydraulic seals), and ISO 6402 (for O-rings), and have passed API Q1+ and ISO 9001:2008 certifications—rigorous quality benchmarks for oilfield well control components. Each unit undergoes 100% pressure testing (up to 75MPa for high-pressure seals) and leakage testing before leaving the factory. Backed by 19 years of oilfield BOP seal R&D and production experience, our products have been used in 62 major oilfields globally, with a cumulative service life of over 1,320,000 hours in harsh BOP operating environments. Our PDD401250 Turcon Double Delta seal has a mean time between failures (MTBF) of 17,500 hours, while our OR5011500 O-ring lasts up to 29 months under continuous BOP operation—10,500 hours and 10 months longer than the industry average, respectively. The FH3570-14-0 Combination Sealing Ring maintains tight sealing even after 1,500 cycles of BOP actuation, 400 cycles more than standard industry combination seals. All parts feature drop-in replacement design, eliminating the need for BOP modifications and reducing maintenance time by up to 7.5 hours per replacement—critical for minimizing downtime during emergency well control.

Key Product Functions

Every sealing component is engineered to address specific well control pain points, with core functions focused on tight sealing, wear resistance, and pressure resistance—directly supporting the safe operation of BOP systems and preventing common failures like fluid leakage and component damage:

• O-rings & Backup Rings: OR5011500 115X5.0 O-ring, OR4005000 50X4 O-ring, and 5.8X1.9(IDxd) O-ring provide static and dynamic sealing for BOP adapter rings, piston assemblies, and hydraulic connections, solving the problem of well fluid leakage at seal interfaces—preventing environmental pollution and well fluid loss. Backup rings (BU3100500, BBP80B433-V9) support O-rings under high pressure (up to 75MPa), solving the problem of seal extrusion and deformation—ensuring sealing integrity even in extreme well control conditions.

• Turcon Double Delta Seals: PDD401250, PDD401600, and RDD401400-T46N Turcon Double Delta seals provide high-performance dynamic sealing for BOP piston rods and ram shafts, solving the problem of fluid leakage during repeated BOP actuation—ideal for FH23-21NL annular BOPs and ram BOPs. These seals resist well fluid corrosion and high temperatures, solving the problem of premature seal failure in harsh oilfield environments.

• Combination & Rod Seals: FH3570-14-0, SKFW14-353-03.08 Combination Sealing Rings integrate multiple sealing functions, solving the problem of complex BOP sealing requirements and reducing the number of spare parts needed. C115-22 0145X0160X9/10 Rod Seal provides tight sealing for BOP rod assemblies, solving the problem of fluid leakage along the rod—preventing hydraulic system contamination and component damage.

• Wear Rings & Adapter Rings: FH3570-15, FH3570-16 Wear Rings reduce friction between BOP pistons and shells, solving the problem of piston wear and extending piston service life by 3.5 years. H31.06 Upper, H31.08 Lower, and H31.10 Inside O-ring Adapter Rings ensure proper alignment and sealing of O-rings, solving the problem of O-ring misalignment and leakage—critical for BOP adapter assembly integrity.

Structural Features

Our BOP sealing components are designed with field practicality and durability in mind, incorporating structural features that directly address the harsh conditions of BOP operations—high pressure, well fluid corrosion, extreme temperatures, and frequent actuation:

• O-rings & Backup Rings: O-rings are made of high-quality nitrile rubber or fluororubber (depending on application), with precise ID/OD dimensions (e.g., 115X5.0, 5.8X1.9) and a smooth surface to prevent leakage. Backup rings (BU3100500, BBP80B433-V9) are made of rigid PTFE, designed to fit perfectly with O-rings—preventing extrusion under high pressure and extending seal life by 2.5 years. The BBP80B433-V9 Backup Ring features a specialized cross-section to adapt to irregular seal interfaces, ensuring tight support.

• Turcon Double Delta Seals: These seals feature a unique double-delta cross-section that expands under pressure, enhancing sealing performance during dynamic movement. Made of Turcon material with excellent wear resistance and chemical resistance, they withstand well fluid corrosion and high temperatures (up to 135℃)—ideal for frequent BOP actuation. The PDD402100-T46N model is specifically designed for FH23-21NL annular BOPs, ensuring perfect fit and reliable sealing.

• Combination & Rod Seals: Combination sealing rings integrate sealing and wear-resistant functions, reducing the number of components and simplifying maintenance. They are made of a combination of rubber and PTFE, ensuring both tight sealing and low friction. Rod seals (C115-22 0145X0160X9/10) feature a lip design that adapts to rod movement, ensuring tight sealing even if the rod is slightly misaligned—preventing fluid leakage and contamination.

• Wear Rings & Adapter Rings: Wear rings are made of high-strength PTFE with a low-friction surface, reducing piston wear and ensuring smooth movement—dimensional accuracy of ±0.01mm ensures perfect fit with BOP piston and shell assemblies. Adapter rings (H31 series) are made of corrosion-resistant steel, with precise machining to ensure O-ring alignment—preventing O-ring misalignment, a common cause of seal failure.

Applicable Working Conditions

Our BOP sealing components are specially engineered to withstand the harshest oilfield environments, perfectly suited for the extreme conditions of BOP operation—high pressure, well fluid corrosion, extreme temperatures, and frequent actuation:

• Offshore Oilfield BOP Systems: Adapt to high humidity (relative humidity 85%-100%), salt spray corrosion, and seismic intensity up to 8 degrees. Ideal for FH23-21NL annular BOPs with PDD402100-T46N Turcon Double Delta seals, FH3570 series BOPs with FH3570-14-0 Combination Seals, and ram BOPs with OR5011500 O-rings—where seal reliability is critical for preventing offshore environmental pollution.

• Onshore High-Pressure Oilfields: Withstand ambient temperature from -45℃ to 135℃ and working pressure up to 75MPa (10875psi). Suitable for H31 and H06 series BOP components, C115-22 Rod Seals, and GR4300280 Turite SlydRing in desert and high-temperature wells—where extreme conditions test seal durability and performance.

• Annular & Ram BOPs: Specifically designed for FH23-21NL annular BOPs, FH3570 series BOP assemblies, and various ram BOPs (equipped with H31 and H06 series components). These seals handle the frequent actuation (up to 60 times per day) required for well control operations, preventing wear and leakage.

• Well Control Emergency Scenarios: All parts are designed to perform reliably during emergency well control, such as blowout prevention—ensuring BOPs can close fully and maintain tight sealing even under extreme pressure (up to 75MPa), preventing well fluid leakage and catastrophic incidents.

Maintenance and Care Recommendations

To extend seal service life and ensure BOP operational safety, our senior BOP maintenance engineers provide field-proven, actionable suggestions—avoiding common mistakes that lead to premature seal failure, based on industry best practices and years of on-site experience:

• O-rings & Backup Rings: Inspect OR5011500, OR4005000 O-rings and BU3100500 Backup Rings every month for swelling, cracks, or extrusion damage; replace if any defects are found. Store O-rings in a cool, dry environment (temperature 5℃-25℃) to prevent rubber aging, and avoid contact with well fluid or chemicals before installation. Ensure backup rings are installed in the correct direction—incorrect installation is a common cause of O-ring extrusion and failure.

• Turcon Double Delta Seals: Inspect PDD401250, RDD401400-T46N Turcon seals every 2 months for lip damage or wear; replace if the lip is torn or flattened. Clean the BOP rod or piston surface before installation to remove debris—debris on sealing surfaces can cause rapid seal wear. Avoid using sharp tools when installing these seals, as they can damage the Turcon material and reduce sealing performance.

• Combination & Rod Seals: Inspect FH3570-14-0 Combination Seals and C115-22 Rod Seals every 1.5 months for leakage or wear; replace if leakage is detected. Lubricate the seal and installation surface with high-temperature, oil-resistant lubricant (ISO VG 68) before installation to reduce friction—this step can extend seal life by 7 months. For combination seals, ensure all components are properly aligned during installation to avoid misalignment and leakage.

• Wear Rings & Adapter Rings: Inspect FH3570-15, FH3570-16 Wear Rings and H31 series Adapter Rings every 2 months for wear or deformation; replace if wear depth exceeds 1.0mm. Clean the adapter ring groove and piston surface before installation to remove debris—debris can cause misalignment and wear. Check the adapter ring for corrosion regularly, as corrosion can affect O-ring alignment and sealing performance.

We supply the following spare parts:

Field Fault Maintenance Cases

The following are 4 real on-site maintenance cases from domestic and foreign oilfields, demonstrating how our BOP seals solve actual well control problems and deliver reliable performance:

1. Case 1: Bohai Bay Offshore Oilfield (China) – Equipment Model: FH23-21NL Annular BOP; Fault: PDD402100-T46N Turcon Double Delta seal leakage causing well fluid loss of 50L/h, BOP unable to maintain pressure; Load: 70MPa well pressure, 95% humidity; Solution: Replace with our PDD402100-T46N Turcon Double Delta seal; Repair Effect: No leakage, BOP maintains stable pressure for 168 hours, actuation smooth; Customer Feedback: “The seal fits perfectly with our FH23-21NL BOP—restoring its sealing capability and preventing a potential blowout, which is critical for our offshore safety compliance.”

2. Case 2: Eagle Ford Shale Oilfield (USA) – Equipment Model: FH3570 BOP Assembly; Fault: FH3570-14-0 Combination Sealing Ring wear causing piston leakage, hydraulic oil contamination, and piston wear; Load: 75MPa working pressure, 32Hz vibration; Solution: Replace with our FH3570-14-0 Combination Sealing Ring and clean hydraulic oil; Repair Effect: No leakage, piston wear reduced to 0.008mm/month, oil remains clean for 7 months; Customer Feedback: “The combination seal’s durability is exceptional—we no longer have oil contamination issues, saving us from costly piston replacements and unplanned downtime.”

3. Case 3: Tarim Onshore Oilfield (China) – Equipment Model: Ram BOP (H31 series components); Fault: OR5011500 115X5.0 O-ring leakage causing adapter ring seepage, well fluid corrosion of BOP body; Load: 65MPa well pressure, 89℃ ambient temperature; Solution: Replace with our OR5011500 O-ring and BU3100500 Backup Ring; Repair Effect: No seepage, BOP body corrosion stopped, stable operation for 144 hours; Customer Feedback: “The O-ring and backup ring work perfectly together—withstanding high temperature and pressure, reducing our maintenance frequency and ensuring BOP reliability in desert conditions.”

4. Case 4: North Sea Offshore Oilfield (UK) – Equipment Model: Ram BOP; Fault: C115-22 0145X0160X9/10 Rod Seal failure causing fluid leakage along the rod, hydraulic system contamination; Load: 60MPa working pressure, high salt spray; Solution: Replace with our C115-22 Rod Seal; Repair Effect: No leakage, hydraulic oil remains clean, rod movement smooth; Customer Feedback: “The rod seal’s sealing performance is outstanding—even in harsh offshore salt spray, it maintains tight sealing, protecting our hydraulic system from contamination and ensuring BOP reliability.”

FAQ (Frequently Asked Questions)

Procurement Guide

We supply a full range of high-quality BOP sealing components, including OR5011500 115X5.0 O-ring, PDD401250 Turcon Double Delta, FH3570-14-0 Combination Sealing Ring, C115-22 Rod Seal, and FH23-21NL Annular BOP adapt seals—all designed to meet the rigorous demands of oilfield BOP operations. Our parts feature drop-in replacement compatibility, long service life, and compliance with global industry standards, effectively solving pain points such as BOP seal leakage, piston wear, rod seal failure, and adapter ring seepage. All products meet API 16A, API 16C, and GB/T 20425-2006 standards, and have passed CE, RoHS, and TUV certifications, ensuring compliance with global oilfield safety regulations and avoiding the severe consequences of BOP failure. Whether you need batch procurement for daily BOP maintenance or emergency replacement seals for urgent well control failures, we can provide high-quality products and professional technical support. To ensure you get the correct parts, please provide the BOP model, part number, or specific specifications when contacting us. Our technical team will help you confirm compatibility, provide a detailed quotation, and share technical parameters and maintenance guides to ensure smooth installation and operation. We are committed to delivering cost-effective solutions and attentive after-sales service, helping you improve BOP reliability, reduce downtime, and maintain safe, compliant oilfield operations.

contact us ：

Emeil: [email protected]  

whatsapp: +86 15275658619