Core Application & Target User Requirement Statement
This catalog is exclusively tailored forBOP (Blowout Preventer) systems of onshore/offshore drilling rigs, compatible with mainstream models such as 13-5/8" × 10,000 psi, 18-3/4" × 15,000 psi BOP stacks. It addresses the critical needs of drilling rig maintenance supervisors, oilfield procurement managers, and BOP system service technicians who require precision-matched, standard-compliant parts to ensure BOP operational stability, guide rail positioning accuracy, and well control safety. The core purpose is to provide an authoritative, actionable reference that serves as both a procurement standard (ensuring part compatibility and compliance with GB/API standards) and a technical troubleshooting tool (resolving part wear and failure issues efficiently) in oil & gas well drilling and completion scenarios.
Classified Parts Inventory & Detailed Specifications
1. BOP Guide Rail Core Component
As the key guiding structure for BOP lifting, lowering, and positioning, this component ensures precise alignment of the BOP stack with the wellhead, directly affecting well control reliability. Wear, deformation, or corrosion of the guide rail device can lead to BOP jamming during emergency operations, resulting in catastrophic blowout risks—a major pain point in high-pressure well drilling. High-strength, corrosion-resistant guide rail components ensure stable guiding performance, critical for offshore deep-water drilling and onshore high-pressure gas well operations, directly enhancing well control safety redundancy.
No. | Part Name | Part Number | Material | Main Wear Causes | Preventive Maintenance Guidelines |
1 | BOP guide rail device | - | Q690 High-Strength Low-Alloy Steel (Welded & Stress-Relieved, Marine-Grade Anti-Corrosion Coated) | 1. Abrasive wear of guide surfaces from BOP movement and drilling fluid contamination; 2. Weld joint fatigue cracking from cyclic load impact during BOP hoisting. | 1. Clean guide surfaces daily and apply high-pressure anti-wear grease; 2. Conduct ultrasonic testing (UT) of weld joints every 6 months to detect hidden cracks. |
2. Structural Connection & Support Plates
These plates serve as critical structural components for BOP guide rail installation, load distribution, and module connection. Plate deformation, corrosion, or edge damage can lead to uneven load bearing of the guide rail system, resulting in guide rail misalignment and BOP positioning errors. High-precision, high-strength plates ensure stable structural integration, suitable for harsh drilling environments with high vibration, salt spray, and drilling fluid erosion, directly improving the service life of the guide rail system and reducing maintenance frequency.
No. | Part Name | Part Number | Material | Main Wear Causes | Preventive Maintenance Guidelines |
1 | Board 302x280 | 112.64.300.01 | Q355B Carbon Steel (Precision Cut, Anti-Corrosion Coated) | 1. Corrosion from long-term exposure to drilling fluid and saltwater; 2. Bending deformation from uneven bolt preload during installation. | 1. Clean drilling fluid residue regularly and reapply anti-corrosion coating quarterly; 2. Use a calibrated torque wrench to ensure uniform bolt preload during installation. |
2 | Board 10493x138 | 112.64.300.03 | Q355B Carbon Steel (Long Plate, Stress-Relieved After Cutting) | 1. Torsional deformation from transportation and hoisting impact; 2. Edge wear from contact with guide rail components. | 1. Use specialized lifting tools to avoid impact during transportation; 2. Install wear-resistant pads at edge contact points. |
3 | Board δ14 | 112.64.300.04 | Q355B Carbon Steel (14mm Thick, Pickled & Oiled) | 1. Abrasive wear from contact with moving parts; 2. Corrosion in high-humidity drilling environments. | 1. Inspect contact surfaces monthly for wear; rework or replace if wear exceeds 2mm; 2. Apply weather-resistant anti-corrosion coating to exposed surfaces. |
4 | I56b L=10533 | 112.64.300.02 | I-Beam Steel Q355B (Hot-Rolled, Length 10533mm) | 1. Bending deformation from long-term load bearing; 2. Corrosion of web and flange surfaces from environmental exposure. | 1. Regularly check straightness; correct deformation using hot straightening if needed; 2. Apply anti-corrosion paint to web and flange surfaces annually. |
5 | L75x50x8 | 112.59.800.03 | Angle Steel Q355B (75×50×8mm, Hot-Rolled) | 1. Weld joint fatigue from cyclic vibration; 2. Corrosion at angle intersections due to moisture accumulation. | 1. Conduct magnetic particle testing (MPT) of weld joints annually; 2. Seal angle intersections with anti-corrosion sealant to prevent moisture ingress. |
3. Lifting & Hoisting Components
These components are essential for BOP guide rail hoisting, installation, and maintenance, responsible for safe load transmission during component lifting. Pad eye fatigue, pin wear, or connection failure can lead to lifting accidents, resulting in equipment damage and personnel safety hazards. High-strength, forged lifting components ensure reliable load-bearing performance, compliant with GB/API lifting standards, critical for heavy-load hoisting operations in offshore platforms and onshore drilling sites, directly improving hoisting safety and operational efficiency.
No. | Part Name | Part Number | Material | Main Wear Causes | Preventive Maintenance Guidelines |
1 | Pad eye mounting | 112.59.801.00 | Q690 High-Strength Steel (Forged & Welded) | 1. Weld joint fatigue cracking from repeated hoisting cycles; 2. Corrosion of mounting base from saltwater or drilling fluid. | 1. Conduct UT of weld joints every 6 months; 2. Apply marine-grade anti-corrosion coating to the entire component and inspect monthly. |
2 | Single pad eye | 112.64.301.00 | Q690 High-Strength Steel (Forged) | 1. Fatigue cracking at load-bearing holes from cyclic tension; 2. Wear of hole surfaces from contact with lifting pins. | 1. Conduct MPT annually to detect fatigue cracks; 2. Lubricate load-bearing holes with anti-wear grease before each use. |
3 | Single pad eye | 112.64.302.00 | Q690 High-Strength Steel (Forged) | 1. Overload damage beyond rated load capacity; 2. Corrosion in high-humidity offshore environments. | 1. Strictly comply with rated load limits; install load sensors for real-time monitoring during hoisting; 2. Store in a dry environment when not in use and reapply anti-corrosion coating regularly. |
4 | Pad eye mounting | 112.59.804.00 | Q690 High-Strength Steel (Forged & Welded) | 1. Loosening of mounting bolts due to drilling vibration; 2. Abrasive wear of base surface from contact with structural components. | 1. Re-torque mounting bolts monthly using a calibrated torque wrench; 2. Install anti-wear washers between the base and structural components. |
4. Pin & Fastener Components
These components serve as critical locking and connecting elements for BOP guide rail systems, securing lifting components, structural plates, and guide rail modules. Pin corrosion, safety pin fatigue, or clip loosening can lead to component disconnection and guide rail system failure—key risks in high-vibration drilling environments. High-precision, heat-treated pins and standard-compliant fasteners ensure reliable connection integrity, compliant with GB standards, directly enhancing the stability and safety of the entire guide rail system.
No. | Part Name | Part Number | Material | Main Wear Causes | Preventive Maintenance Guidelines |
1 | Biconic pin φ60x250 | 112.45.35.01 | 42CrMo Alloy Steel (Quenched & Tempered, Hardness HRC45-50) | 1. Wear of conical surfaces from repeated insertion/removal; 2. Corrosion pitting in saltwater environments. | 1. Lubricate conical surfaces with anti-corrosion grease before installation; 2. Apply marine-grade anti-corrosion coating to exposed ends and inspect monthly. |
2 | Safety pin φ15 | 112.45.35.02 | Carbon Steel 45# (Heat-Treated) | 1. Fatigue from repeated opening/closing; 2. Corrosion leading to brittleness and reduced tensile strength. | 1. Inspect for bending and corrosion weekly; replace immediately if damaged; 2. Store spare safety pins in a dry, oiled environment to prevent corrosion. |
3 | Clip φ30 | 111.03.100.02 | Spring Steel 65Mn (Heat-Treated) | 1. Spring fatigue leading to loss of clamping force; 2. Corrosion from drilling fluid immersion. | 1. Inspect clamping force monthly; replace if clamping is loose; 2. Clean with diesel after exposure to drilling fluid and dry thoroughly. |
4 | Bolt M24X70 | GB31.1-1988 | Alloy Steel 40Cr (Heat-Treated, Zinc-Plated) | 1. Thread wear from repeated assembly/disassembly; 2. Corrosion of zinc plating in harsh environments. | 1. Use thread protectors during storage; avoid over-tightening during assembly; 2. Inspect zinc plating for damage; touch up with anti-corrosion paint as needed. |
Procurement Guidance & Technical Support
All parts listed in this catalog are manufactured in strict compliance with GB standards (e.g., GB31.1-1988 for bolts) and API 6A (Specification for Wellhead and Christmas Tree Equipment) requirements, ensuring 100% compatibility with the targeted BOP guide rail systems. Selecting these certified parts is critical to maintaining BOP system operational safety, guide rail positioning accuracy, and well control reliability—avoiding the risks of premature failure and safety hazards associated with non-compliant components.
Whether you require urgent replacement parts for unplanned maintenance, spare parts inventory for proactive upkeep, or professional technical consultation on part selection, installation, or wear prevention, our team is dedicated to providing tailored solutions. To streamline your procurement process, please provide the part number(s) and required quantities from this catalog when contacting our sales team. Our certified technical experts are also available to address any technical queries, helping you optimize maintenance strategies and minimize operational downtime. Partner with us for reliable, high-quality BOP guide rail related parts and comprehensive support to keep your well control operations running safely and smoothly.
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