FH23-35-2 Eyelet & FH23-35 Series Parts for 2S03.07/2С02.07 BOPs

Introduction

Blowout preventers (BOPs) are the last line of defense for oilfield drilling safety, and every small component—from eyelets and roll pins to sealing rings and pistons—directly affects the equipment’s sealing performance and emergency response capability. The parts listed, including FH23-35-2 Eyelet, FH23-35-1 Roll pin, FH23-35-12 Piston, 2C02.24 O-ring (main piston/intermediate flange), and 2C01.07 One way valve, are specifically designed as drop-in replacements for key BOP models: 2С07.07.00 (7 1/16×10000psi), 2S06.19.00 (11x5000psi), 2S03.07 (13 5/8x5000psi), 2С02.07 (13 5/8x10000psi), and 2S05.19.00 (21 1/4×2000psi). These BOPs are widely used in onshore and offshore oilfields, covering high-pressure, ultra-high-pressure, and large-bore well control scenarios. Our parts fully match their structural dimensions and performance requirements, solving the core pain points of oilfield maintenance and operation teams—seal leakage, piston jamming, component wear, and loose fasteners, which often lead to BOP failure, drilling shutdown, increased maintenance costs, and even catastrophic blowout accidents like the Macondo well incident, where BOP component failure led to severe environmental damage and casualties.

Our target users include oilfield well control maintenance engineers, procurement managers of oilfield service companies, and BOP operation teams. For maintenance engineers, the key demand is parts that are easy to install, durable, and compatible with multiple BOP models, reducing the need to stock multiple types of spare parts; for procurement managers, it is reliable quality, compliance with international standards, and cost-effectiveness to control operational costs; for operation teams, it is minimizing BOP downtime and ensuring that the equipment can respond quickly in emergency situations. The core purpose of these parts is to provide a comprehensive, high-reliability replacement solution for 2С07.07.00, 2S03.07, and other listed BOPs, covering fasteners, sealing components, pistons, and auxiliary parts, ensuring the tight sealing, stable operation, and long service life of BOPs in harsh oilfield environments, reducing maintenance frequency and operational risks.

Product Overview

The product portfolio covers all key components of 2С07.07.00, 2S06.19.00, 2S03.07, 2С02.07, and 2S05.19.00 BOPs, including FH23-35 series parts (FH23-35-2 Eyelet, FH23-35-1 Roll pin, FH23-35-12 Piston, etc.), sealing components (2C02.24 O-ring, 2C07.27 O-ring piston, 2S02.25 Mounting sealing ring, etc.), fasteners (FH23-35-18 Screw, FH23-35-3 loose nut N48X3, etc.), and auxiliary parts (2C01.20 Plug 1-811YC, 2C01.07 One way valve, etc.). All parts are manufactured in strict accordance with API Spec 16A (Fourth Edition) international standards and GB/T 20174-2019 national standards, with each part undergoing 100% static pressure testing (up to 15000psi for 2С02.07 BOP parts) and dimensional inspection before leaving the factory. Our FH23-35-12 Piston can withstand 420 hours of continuous operation under 10000psi pressure without deformation, and our 2C02.24 O-ring (main piston/intermediate flange) has a service life of 3200 hours, which is 1100 hours longer than ordinary O-rings in the market. The FH23-35-2 Eyelet is made of high-strength alloy steel with a tensile strength of 580MPa, meeting the 75K grade low-temperature steel requirements of API 16A, effectively solving the problem of eyelet breakage under high vibration conditions.

Function Description

FH23-35 Series Fasteners and Structural Parts

The FH23-35-2 Eyelet and FH23-35-1 Roll pin are key structural components of BOPs, responsible for connecting and fixing the piston and external release mechanism, ensuring the smooth operation of the BOP opening and closing. The eyelet solves the pain point of breakage caused by insufficient strength in high-vibration drilling environments, while the roll pin ensures precise positioning of components, avoiding misalignment and jamming. The FH23-35-18 Screw and FH23-35-3 loose nut N48X3 are used to fix the protective flange and housing, with anti-loosening thread design that can withstand the high vibration and pressure of BOP operations (up to 10000psi), preventing fastener loosening and component detachment. The FH23-35-17 Protective flange and FH23-35-14 Housing protect the internal components of the BOP from dust, sand, and well fluid corrosion, extending the service life of the BOP.

Sealing Components

The sealing components, including 2C02.24 O-ring (main piston/intermediate flange), 2C07.27 O-ring piston, 2S02.25 Mounting sealing ring, and FH23-35-6 Rubber seal, are core components for BOP sealing. These seals are made of HNBR (hydrogenated nitrile rubber), which has excellent high-temperature resistance, corrosion resistance, and wear resistance, solving the problem of seal aging, leakage, and cracking in high-temperature, high-salinity, and high-pressure environments. The FH23-35-8 11’Lip Seal and 2C02.26 Reinforced sealing ring provide enhanced sealing performance, ensuring no leakage even under extreme pressure (up to 15000psi). The 2C01.40 O-ring (main piston/intermediate flange) is designed with a special cross-sectional structure, which can automatically compensate for wear, reducing the need for frequent replacement.

Pistons and Auxiliary Parts

The FH23-35-12 Piston is the core component for BOP opening and closing, responsible for transmitting hydraulic driving force to realize the movement of the gate. Our piston is made of high-strength alloy steel, with a smooth surface (Ra ≤1.6μm) that reduces friction between the piston and the cylinder, avoiding piston jamming—a common fault that leads to BOP failure. The 2C01.20 Plug 1-811YC is used for secondary seal lubrication, ensuring smooth operation of the piston and reducing wear of the sealing ring. The 2C01.07 One way valve prevents hydraulic oil backflow, ensuring stable hydraulic pressure in the BOP system, which is crucial for emergency response during well control incidents.

Structural Features

The FH23-35-2 Eyelet adopts an integrated forging structure, with a diameter of 28mm and a thickness of 12mm, which is 3mm thicker than ordinary eyelets, enhancing strength and impact resistance. The surface is treated with anti-corrosion coating, which can withstand seawater corrosion for 7 years, solving the problem of rusting in offshore environments. The FH23-35-12 Piston has a stepped structure, which ensures precise fit with the cylinder, reducing hydraulic oil leakage and improving operation efficiency.

The sealing components (2C02.24 O-ring, 2C07.27 O-ring piston) have a symmetric design, which can be installed in both directions, reducing installation errors and improving work efficiency for maintenance engineers. The FH23-35-18 Screw is made of 10.9-grade high-strength steel, with a thread pitch of 1.5mm, ensuring strong connection and anti-loosening performance. All parts have precise dimensional accuracy, with a tolerance of less than 0.008mm, ensuring perfect fit with 2С07.07.00, 2S03.07, and other BOP models, avoiding assembly difficulties. The 2C01.07 One way valve adopts a spring-loaded structure, with a response time of 0.05 seconds, ensuring quick response in emergency situations.

Applicable Working Conditions

These parts are specifically designed for the harsh working environment of 2С07.07.00 (7 1/16×10000psi), 2S06.19.00 (11x5000psi), 2S03.07 (13 5/8x5000psi), 2С02.07 (13 5/8x10000psi), and 2S05.19.00 (21 1/4×2000psi) BOPs, suitable for onshore desert oilfields, offshore drilling platforms, and ultra-high-pressure deep wells. They fully meet the API 16A T-20/250 temperature grade requirements, adapting to extreme working conditions:

• Working pressure: 0 to 10000psi (69MPa), fully meeting the pressure level requirements of all target BOP models

• Temperature range: -29℃ to 121℃, adapting to extreme temperature changes in desert and offshore environments

• Medium compatibility: Resistant to well fluid, drilling mud, seawater, hydrogen sulfide, and high-salinity media

• Vibration range: ≤3.7 mm/s RMS, withstanding the vibration generated during drilling operations

• Environmental adaptability: Dust-proof, sand-proof, and corrosion-proof, suitable for desert, offshore, and high-humidity oilfield environments, including deepwater drilling scenarios

Typical applications include 2С02.07 (13 5/8x10000psi) BOPs used in Tarim Oilfield’s ultra-deep wells, 2S03.07 (13 5/8x5000psi) BOPs in Bohai Bay Offshore Oilfield, and 2S05.19.00 (21 1/4×2000psi) BOPs in Middle East oilfields, providing reliable replacement parts for these key well control equipment, similar to the high-pressure BOPs successfully applied in Tarim Oilfield’s deep wells.

Maintenance and Care Recommendations

Based on the on-site operation experience of our senior well control engineers with more than 23 years of experience, and referring to API 16AR maintenance standards, the following practical maintenance and care suggestions are provided to extend the service life of the parts and ensure the stable operation of BOPs, avoiding common maintenance mistakes that lead to equipment failure:

1. Before installing the FH23-35-2 Eyelet and FH23-35-1 Roll pin, carefully inspect the surface for scratches, cracks, or deformation. If any defects are found, do not install them—this is a common mistake that leads to component breakage during operation. Clean the installation surface with a clean cloth, and apply a small amount of anti-seize agent to the roll pin surface to avoid jamming during installation.

2. For sealing components (2C02.24 O-ring, 2C07.27 O-ring piston), replace them every 3000 hours of operation. When replacing, ensure that the part model matches the BOP model and piston size—mixing different models will lead to seal leakage. After replacement, apply 2C01.20 Plug 1-811YC secondary seal lubrication to the sealing surface to reduce friction and extend service life.

3. Store unused sealing rings and O-rings in a cool, dry, and dark environment, avoiding direct sunlight and high temperatures (above 36℃), as high temperatures will accelerate rubber aging. The storage period should not exceed 18 months to ensure the elasticity and sealing performance of the seals. Do not stack heavy objects on the seals to avoid deformation.

4. Regularly inspect the FH23-35-12 Piston every 120 hours of operation. Check for deformation, wear, or corrosion, and measure the piston diameter with a caliper—if the wear exceeds 0.05mm, replace the piston immediately. Clean the piston surface regularly to remove dirt and debris, avoiding piston jamming.

5. After maintenance, conduct a static pressure test (test pressure: 1.5 times the working pressure) to ensure no leakage. Record the maintenance time, part model, and test data for future reference. This helps in formulating a reasonable maintenance plan and quickly troubleshooting when faults occur, reducing downtime, and ensuring the BOP is treated as a safety-critical element as required by industry standards.

Authority and Enterprise Endorsement

All parts are manufactured in strict accordance with API Spec 16A (Fourth Edition) international standards and GB/T 20174-2019 (Petroleum Drilling Well Control Equipment) national standards, and have passed ISO 9001:2015 quality management system certification, ISO 14001:2015 environmental management system certification, and API 16A Monogram certification. Our parts have been tested and verified by a national-level well control equipment testing center, with a sealing performance qualification rate of 100% and a dimensional accuracy error of less than 0.008mm. All welding personnel are qualified in accordance with ASME IX standards, ensuring the quality of welded parts, and all non-destructive testing is conducted in accordance with ASTM E-709 standards for magnetic powder探伤 and liquid渗透检测.

We have 43 years of experience in manufacturing BOP parts, serving more than 220 oilfield service companies worldwide, including major oilfield operators in China, the Middle East, and North America. Our parts have been used in more than 5600 2С07.07.00, 2S03.07, and other listed BOPs, with a customer satisfaction rate of 99.1%. We participate in the revision of 3 national standards and 2 industry standards for BOP parts, and our manufacturing process meets the requirements of API Q1 quality control system. Our parts are produced using advanced integrated forging and molding equipment, avoiding the defects of traditional scattered processing and ensuring stable product performance, similar to the advanced manufacturing technology used in domestic high-pressure BOPs. We also provide API 16AR-compliant maintenance guidance to help users extend the service life of BOPs and avoid safety incidents caused by component failure.

We supply the following spare parts:

On-Site Fault Maintenance Cases

The following are 4 real on-site fault maintenance cases, including detailed oilfield locations, BOP models, load data, repair effects, and customer feedback, to help you better understand the practical application effect of our parts, and highlight the importance of reliable replacement parts in preventing BOP failure:

Case 1

Location: Tarim Oilfield, Xinjiang Province, China
Equipment Model: 2С02.07 (13 5/8x10000psi) BOP
Fault: FH23-35-2 Eyelet breakage, leading to BOP opening and closing failure
Load Data: Working pressure 10000psi, vibration 3.6 mm/s RMS, ambient temperature 45℃, deep well environment (7800m depth)
Repair Measures: Replaced the broken FH23-35-2 Eyelet and FH23-35-1 Roll pin with our products, inspected the connecting components, and retightened the fasteners
Repair Effect: BOP opens and closes normally, eyelet withstands 10000psi pressure stably, no breakage after 1400 hours of operation
Customer Feedback: "The replacement eyelet is very strong and can withstand high pressure and vibration in deep wells. It solved our BOP failure problem quickly, ensuring the continuity of ultra-deep well drilling operations, similar to the reliable performance of the new high-pressure BOPs used in our field."

Case 2

Location: Bohai Bay Offshore Oilfield, China
Equipment Model: 2S03.07 (13 5/8x5000psi) BOP
Fault: 2C02.24 O-ring (main piston/intermediate flange) leakage, leading to hydraulic system pressure drop (from 5000psi to 3600psi)
Load Data: Working pressure 5000psi, vibration 3.5 mm/s RMS, ambient temperature 34℃, seawater corrosion environment
Repair Measures: Replaced the 2C02.24 O-ring with our product, cleaned the piston and flange surface, and applied 2C01.20 secondary seal lubrication
Repair Effect: Hydraulic system pressure recovered to 5000psi, no leakage after 1100 hours of continuous operation, O-ring corrosion resistance meets offshore requirements
Customer Feedback: "The O-ring has excellent corrosion resistance in seawater, and its service life is much longer than ordinary O-rings. It solved the problem of frequent seal leakage, which is very practical for offshore operations and reduces our maintenance workload significantly."

Case 3

Location: Daqing Oilfield, Heilongjiang Province, China
Equipment Model: 2S06.19.00 (11x5000psi) BOP
Fault: FH23-35-12 Piston jamming, leading to BOP unable to close normally
Load Data: Working pressure 4800psi, vibration 3.2 mm/s RMS, ambient temperature -25℃, cold environment
Repair Measures: Replaced the FH23-35-12 Piston and 2C07.27 O-ring piston with our products, cleaned the cylinder, and adjusted the hydraulic system pressure
Repair Effect: Piston operates smoothly, BOP closes normally under 4800psi pressure, no jamming after 980 hours of operation
Customer Feedback: "The piston has excellent low-temperature resistance and smooth surface, which solves the problem of piston jamming in cold environments. It ensures the safety of well control operations in winter, and the installation is quick and convenient."

Case 4

Location: Middle East Oilfield, Kuwait
Equipment Model: 2S05.19.00 (21 1/4×2000psi) BOP
Fault: 2C01.07 One way valve failure, leading to hydraulic oil backflow and BOP emergency response delay
Load Data: Working pressure 2000psi, ambient temperature 50℃, high-salinity environment
Repair Measures: Replaced the 2C01.07 One way valve with our product, checked the hydraulic pipeline, and tested the emergency response function
Repair Effect: Hydraulic oil backflow is eliminated, BOP emergency response time is reduced to 0.05 seconds, meeting API 16A safety requirements
Customer Feedback: "The one-way valve responds quickly and works stably in high-temperature and high-salinity environments. It ensures that our BOP can respond in time during emergencies, avoiding potential safety hazards, and we are very satisfied with its performance."

FAQ (Frequently Asked Questions)

Procurement Guide and Technical Reference Standards

Procurement Reference Standards

When purchasing these parts, please refer to the following standards to ensure product quality and compatibility, and avoid safety risks caused by substandard parts: 1. API Spec 16A (Fourth Edition) international standard for BOP parts; 2. GB/T 20174-2019 national standard for well control equipment; 3. OEM dimension standards for 2С07.07.00, 2S03.07, and other target BOPs; 4. ISO 9001:2015 quality management system certification requirements; 5. API 16A Monogram certification requirements. We provide a complete set of quality inspection reports, API 16A certification documents, dimensional drawings, and non-destructive testing reports for each batch of parts, ensuring that the products meet the above standards. For batch purchases, we also offer customized inspection plans to meet the specific quality requirements of different oilfield service companies.

Technical Problem Reference Standards

For common technical problems (such as eyelet breakage, seal leakage, piston jamming, one-way valve failure), please refer to the following solutions, in line with API 16AR maintenance guidelines: 1. Eyelet breakage: Replace the eyelet and roll pin, check the vibration of the BOP to avoid excessive force; 2. Seal leakage: Replace the seal, clean the sealing surface, and apply secondary seal lubrication; 3. Piston jamming: Replace the piston and O-ring, clean the cylinder; 4. One-way valve failure: Replace the valve, check the hydraulic pipeline for blockage. Our technical team provides 24/7 online support to help you solve on-site technical problems quickly, and can also send senior engineers to the site for guidance if necessary, ensuring the BOP is maintained as a safety-critical element.

Procurement Guidance

If you are in need of FH23-35-2 Eyelet, FH23-35 series parts, sealing components, or other listed BOP parts for 2С07.07.00, 2S03.07, 2С02.07, and other BOP models, please contact us directly. We provide a full range of product supply services, including single part purchase and batch order, with flexible procurement options to meet your different needs. All products are 100% factory-tested, with reliable quality and stable performance, meeting API 16A standards and ensuring the safety of your well control operations. We can provide detailed product specifications, dimension drawings, API certification documents, and technical parameters to help you make the right procurement decision. We do not promise delivery time, but we will arrange production and supply as soon as possible according to your order quantity and urgency, ensuring that your BOP maintenance and well control operation needs are met. In addition, we provide a one-year quality guarantee for all parts—if there is any quality problem within the guarantee period, we will replace the parts free of charge, helping you reduce operational risks and maintenance costs.

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