Core Purpose & Adaptive Equipment Specification
This document focuses on the classified collation and technical specification of replacement parts for Shenkai Multi-Ram Blowout Preventors (BOPs) with nominal sizes of 4 3/4", 5 3/4", 4", 7 5/8", and 6 5/8". It is exclusively compatible with Shenkai corresponding model multi-ram BOPs, targeting segmented user groups including onshore oilfield drilling contractors, medium-deep well exploration enterprises, coalbed methane (CBM) development companies, and well control equipment maintenance service providers.
Core Purpose: To address industry-specific pain points such as mismatched parts leading to BOP operational failures, premature component wear in complex well conditions (e.g., deviated wells, saline formations), and high maintenance costs due to lack of professional technical guidance. All parts are manufactured in strict compliance with API Spec 16A, GB/T 22513, and NACE MR0175 (for sour service) standards, ensuring full interchangeability with original Shenkai BOP assemblies. This guide serves as a dual-purpose tool: a procurement reference (with clear part number matching, material standards, and technical parameter benchmarks) and a technical troubleshooting manual (detailing wear mechanisms, preventive maintenance measures, and failure avoidance protocols), enabling users to make accurate procurement decisions and optimize well control equipment reliability.
Product Classification & Detailed Specifications
The following sections classify products by the nominal size of Shenkai multi-ram BOPs. Each category is preceded by a product description that integrates pain point reinforcement, value proposition, and scenario anchoring to reflect the unique characteristics of each size in specific drilling scenarios. All specifications are presented in tabular format, excluding inventory columns, with product serial numbers starting from 1 for each category. Key columns include material specifications, main wear causes, and usage precautions with in-depth, differentiated details to support technical decision-making and on-site operation.
Category 1: 4 3/4" Shenkai Multi-Ram BOP Parts
Product Description: This series is custom-engineered for Shenkai 4 3/4" multi-ram BOPs, targeting core pain points of mid-small bore well operations—seal incompatibility with 4 3/4" drill pipes, premature wear from drilling vibration in deviated wells (deviation angle ≤35°), and corrosion of components in mild sour environments. Value Preposition: The profiled seal design ensures perfect fit with 4 3/4" drill pipes, reducing seal leakage risk by 45%. Corrosion-resistant surface treatments (zinc-nickel plating + passivation) extend component service life by 50% in saline or mild sour environments. All parts undergo 100% dimensional inspection (tolerance ±0.008mm) to ensure assembly accuracy. Scenario Anchoring: Suitable for onshore medium-deep wells (well depth 1500-4000m), deviated oil/gas wells, and CBM drilling projects utilizing 4 3/4" drill pipes, compatible with medium-pressure formations (formation pressure ≤60MPa) and mild sour environments (H₂S partial pressure ≤0.0003MPa).
Product Serial Number | Part Number | Material Specification | Main Wear Causes | Usage Precautions | Key Technical Parameters | Applicable BOP Model |
1 | DFZ1310.01N-00 | Housing: 4140 alloy steel (quenched & tempered); Ram block: 4130 alloy steel (carburized layer thickness ≥2.0mm); Seal assembly: FKM composite with corrosion inhibitor (profiled for 4 3/4" drill pipe) | 1. Seal degradation from mild sour drilling fluids; 2. Ram block wear from 4 3/4" drill pipe contact in deviated sections; 3. Housing corrosion from saline formation water ingress | 1. Add sour service corrosion inhibitor to drilling fluid (maintain pH 8.5-10); 2. Inspect ram block surface for wear grooves every 250 working hours (grind if groove depth >0.15mm); 3. Clean housing interior with neutral detergent after well completion to remove salt residues | Max Working Pressure: 60MPa; Temperature Range: -20℃~120℃; Matching Drill Pipe OD: 120.65mm (4 3/4") | Shenkai 4 3/4" Multi-Ram BOP |
2 | DFZ1310.01N-02 | Guide rail: CuAl10Fe3 bronze; Piston rod: 40Cr (hard chrome plating, thickness ≥0.10mm); Seal ring: High-pressure FKM | 1. Guide rail galling due to insufficient lubrication under vibration; 2. Chrome plating scratching by hydraulic oil contaminants; 3. Seal deformation from irregular pressure surges | 1. Apply high-temperature molybdenum disulfide lubricant to guide rails every 120 working hours; 2. Maintain hydraulic oil cleanliness at NAS 7 level (install 10μm precision filters); 3. Install pressure stabilizers to limit pressure fluctuation within ±5% of working pressure | Max Actuation Pressure: 31.5MPa; Ram Closing Stroke: 85±2mm; Guide Rail Hardness: ≥180 HB | Shenkai 4 3/4" Multi-Ram BOP (Actuation System) |
3 | GB70 M12×65 | Screw: 8.8-grade 20MnTiB alloy steel; Surface treatment: Zinc-nickel plating (10-12μm); Nut: 8.8-grade 45# steel with anti-loosening serrations | 1. Thread fatigue under repeated assembly/disassembly; 2. Corrosion of zinc-nickel plating in humid well site environments; 3. Loosening induced by drilling vibration | 1. Torque to 55±3 N·m using a calibrated torque wrench (compliant with GB/T 3098.1); 2. Inspect screws for rust every 2 months (replace if corrosion covers >10% of surface area); 3. Apply medium-strength thread lock compound for vibration-prone positions | Tensile Strength: ≥800MPa; Corrosion Resistance: Salt spray test ≥1000h; Thread Standard: M12×1.75 | Shenkai 4 3/4" Multi-Ram BOP (Fastening Component) |
4 | DFZ1310.01A-02 | Hydraulic piston: 27SiMn alloy steel (forged); Seal assembly: PU+FKM composite; Cylinder liner: 42CrMo alloy steel (honed finish, Ra ≤0.8μm) | 1. Piston wear from hydraulic oil contaminants; 2. Cylinder liner scoring from misaligned piston; 3. Seal leakage under high-temperature conditions | 1. Replace hydraulic oil filters every 500 working hours; 2. Check piston-cylinder coaxiality annually (tolerance ≤0.1mm); 3. Monitor downhole temperature to avoid operation above 120℃ | Piston Diameter: 110mm; Max Hydraulic Pressure: 31.5MPa; Temperature Range: -20℃~120℃ | Shenkai 4 3/4" Multi-Ram BOP (Hydraulic Cylinder) |
5 | DFZ1310.01A-04 | Valve core: 4Cr13NiMo stainless steel; Valve seat: Stellite 6 alloy (welded); Gasket: Spiral wound gasket (316L+graphite) | 1. Valve seat erosion from high-velocity hydraulic oil flow; 2. Gasket compression set under long-term pressure; 3. Valve core corrosion in mild sour environments | 1. Limit hydraulic oil flow rate within 12 L/min; 2. Replace gaskets every 6 months or 50 valve cycles (whichever comes first); 3. Verify NACE MR0175 compliance for valve components annually for sour service | Max Working Pressure: 60MPa; Temperature Range: -20℃~120℃; Valve Port Diameter: 20mm | Shenkai 4 3/4" Multi-Ram BOP (Control Valve Assembly) |
6 | DFZ1310.01N.01-00 | Bushing: 42CrMo alloy steel (heat treated); Retaining ring: 65Mn spring steel (tempered); Seal ring: High-temperature EPDM | 1. Bushing wear from ram reciprocation in deviated wells; 2. Retaining ring fatigue from repeated loading; 3. EPDM seal aging from sunlight exposure (onshore storage) | 1. Inspect bushing wear every 250 working hours (replace if wear exceeds 0.15mm); 2. Check retaining ring for cracks monthly using a magnifying glass; 3. Cover BOP with a protective tarp when not in use to avoid direct sunlight | Bushing Inner Diameter: 55±0.03mm; Max Working Pressure: 60MPa; Temperature Range: -40℃~150℃ | Shenkai 4 3/4" Multi-Ram BOP (Ram Guide Assembly) |
Category 2: 5 3/4" Shenkai Multi-Ram BOP Parts
Product Description: Exclusively designed for Shenkai 5 3/4" multi-ram BOPs, this series addresses mid-bore well control pain points—excessive structural stress on components in medium-high pressure formations, uneven seal wear across the 5 3/4" contact surface, and difficulty in maintaining component alignment in deep deviated wells. Value Preposition: The integral-forged ram block and housing enhance impact resistance by 30% for emergency shut-in operations. The self-aligning ram guide design compensates for minor BOP misalignment (tolerance ≤0.1mm/m), reducing seal wear. All parts are compatible with water-based and oil-based drilling fluids, expanding application scope. Scenario Anchoring: Applicable to onshore medium-deep wells (well depth 2500-5000m), offshore shallow wells, and conventional oil/gas wells utilizing 5 3/4" drill pipes, suitable for medium-high pressure formations (formation pressure ≤75MPa) and deviated wells (deviation angle ≤45°).
Product Serial Number | Part Number | Material Specification | Main Wear Causes | Usage Precautions | Key Technical Parameters | Applicable BOP Model |
1 | DFZ1310.01P-00 | Housing: Integral-forged 4140 alloy steel (quenched & tempered); Ram block: Integral-forged 4130 alloy steel; Seal assembly: Multi-layer FKM+aramid fiber composite | 1. Housing fatigue cracking under medium-high pressure cycles; 2. Uneven seal wear from drill pipe eccentricity; 3. Ram block erosion from high-velocity drilling fluid solids | 1. Conduct pressure testing every 3 months in accordance with API Spec 16A (max test pressure 112.5MPa); 2. Use laser alignment tools to verify drill pipe centering before operation; 3. Maintain drilling fluid solid content below 12% via high-efficiency desanders | Max Working Pressure: 75MPa; Temperature Range: -20℃~130℃; Matching Drill Pipe OD: 146.05mm (5 3/4") | Shenkai 5 3/4" Multi-Ram BOP |
2 | DFZ1310.01P-02 | Guide rail: CuAl10Fe3 bronze (thickened); Piston rod: 40CrNiMoA (hard chrome plating); Seal ring: High-pressure/high-temperature FKM | 1. Guide rail deformation under heavy ram load; 2. Chrome plating wear from hydraulic oil contaminants; 3. Seal degradation under high-temperature conditions | 1. Inspect guide rail straightness every 150 working hours (tolerance ≤0.05mm/m); 2. Maintain hydraulic oil cleanliness at NAS 6 level (install 5μm filters); 3. Use high-temperature hydraulic oil (ISO VG 68, rated to 130℃) | Max Actuation Pressure: 31.5MPa; Ram Closing Stroke: 95±2mm; Guide Rail Hardness: ≥200 HB | Shenkai 5 3/4" Multi-Ram BOP (Actuation System) |
3 | GB70 M12×65 | Screw: 10.9-grade 35CrMo alloy steel; Surface treatment: Zinc-nickel plating + passivation; Nut: 10.9-grade 40Cr steel | 1. Thread failure under high structural loads; 2. Corrosion of zinc-nickel plating in offshore saltwater environments; 3. Loosening induced by platform vibration | 1. Torque to 70±5 N·m using a hydraulic torque wrench; 2. For offshore use, clean screws with fresh water after salt spray exposure; 3. Use double nuts for critical fastening positions to enhance anti-loosening performance | Tensile Strength: ≥1000MPa; Corrosion Resistance: Salt spray test ≥1500h; Thread Standard: M12×1.75 | Shenkai 5 3/4" Multi-Ram BOP (Fastening Component) |
4 | DFZ1310.01A-02 | Hydraulic piston: 27SiMn alloy steel (forged); Seal assembly: PU+FKM composite; Cylinder liner: 42CrMo alloy steel (honed) | 1. Piston deformation from rapid pressure spikes; 2. Cylinder liner wear from contaminant particles; 3. Seal leakage under HTHP cycling | 1. Install pressure relief valves to limit pressure rise rate ≤5MPa/s; 2. Replace hydraulic oil and filters every 400 working hours; 3. Conduct seal integrity testing after each HTHP cycle | Piston Diameter: 140mm; Max Hydraulic Pressure: 31.5MPa; Cylinder Liner Roughness: Ra ≤0.6μm | Shenkai 5 3/4" Multi-Ram BOP (Hydraulic Cylinder) |
5 | DFZ1310.01A-04 | Valve core: 4Cr13NiMo stainless steel; Valve seat: Stellite 21 alloy; Gasket: High-pressure spiral wound gasket (316L+Inconel 625) | 1. Severe valve seat erosion from high-velocity oil flow; 2. Gasket compression set under long-term pressure; 3. Valve core corrosion in sour environments | 1. Install flow control valves to limit flow rate ≤18 L/min; 2. Replace gaskets after each pressure test; 3. Verify NACE MR0175 compliance for all valve components annually | Max Working Pressure: 75MPa; Temperature Range: -20℃~130℃; Valve Port Diameter: 28mm | Shenkai 5 3/4" Multi-Ram BOP (Control Valve Assembly) |
6 | DFZ1310.01P.01-00 | Bushing: 42CrMo alloy steel (heavy-duty); Retaining ring: 65Mn spring steel (thickened); Seal ring: High-temperature EPDM | 1. Bushing wear from heavy ram reciprocation; 2. Retaining ring fatigue failure from repeated loading; 3. EPDM seal aging under high downhole temperatures | 1. Inspect bushing wear every 200 working hours (replace if wear exceeds 0.2mm); 2. Replace retaining rings every 300 working hours as preventive maintenance; 3. Use EPDM seals rated to 150℃ for high-temperature operations | Bushing Inner Diameter: 65±0.03mm; Max Working Pressure: 75MPa; Temperature Range: -40℃~150℃ | Shenkai 5 3/4" Multi-Ram BOP (Ram Guide Assembly) |
Category 3: 4" Shenkai Multi-Ram BOP Parts
Product Description: This series is tailored for Shenkai 4" multi-ram BOPs, addressing small-bore well operation pain points—fragile small-size seals prone to installation damage, strict dimensional matching requirements for 4" components, and difficulty in lubrication maintenance in narrow clearances. Value Preposition: All parts are manufactured with micro-precision machining (tolerance ±0.005mm) to ensure perfect assembly. The reinforced edge seal design prevents installation tearing, improving seal survival rate by 60%. Pre-lubricated components with solid lubricant coating eliminate frequent re-lubrication needs in narrow spaces. Scenario Anchoring: Suitable for onshore shallow wells (well depth ≤1500m), small-bore geothermal wells, water well drilling, and CBM shallow wells utilizing 4" drill pipes, ideal for low-pressure formations (formation pressure ≤40MPa) and non-oil/gas drilling applications.
Product Serial Number | Part Number | Material Specification | Main Wear Causes | Usage Precautions | Key Technical Parameters | Applicable BOP Model |
1 | DFZ1310.01I-00 | Housing: 4140 alloy steel (lightweight design); Ram block: 4130 alloy steel (micro-precision ground); Seal assembly: NBR+aramid fiber (reinforced edge) | 1. Seal edge tearing during manual installation; 2. Ram block wear from 4" drill pipe contact; 3. Housing corrosion from surface water ingress | 1. Use dedicated plastic fixturing tools for seal installation (no manual stretching); 2. Inspect ram surface for wear after each well (polish if depth <0.08mm); 3. Seal BOP housing openings when not in use to prevent water ingress | Max Working Pressure: 40MPa; Temperature Range: -20℃~100℃; Matching Drill Pipe OD: 101.6mm (4") | Shenkai 4" Multi-Ram BOP |
2 | DFZ1310.01I-02 | Guide sleeve: CuSn6 bronze; Piston rod: 40Cr (thin-film chrome plating, 0.04-0.06mm); Seal ring: Ultra-small FKM | 1. Guide sleeve seizure from insufficient lubrication in narrow clearances; 2. Chrome plating scratching by micro-contaminants; 3. FKM seal degradation in high-humidity environments | 1. Use pre-lubricated components with solid lubricant coating (no additional lubrication); 2. Install 3μm hydraulic oil filters to remove micro-contaminants; 3. Store spare parts in desiccated containers (humidity ≤40%) | Max Actuation Pressure: 31.5MPa; Ram Closing Stroke: 70±2mm; Chrome Plating Hardness: ≥60 HRC | Shenkai 4" Multi-Ram BOP (Actuation System) |
3 | GB70 M12×65 | Screw: 8.8-grade 20MnTiB alloy steel; Surface treatment: Zinc plating with passivation; Nut: 8.8-grade 45# steel (miniature profile) | 1. Thread damage from over-torquing (small thread cross-section); 2. Zinc plating corrosion in humid well sites; 3. Loosening induced by light drilling vibration | 1. Torque to 45±3 N·m using a micro-torque wrench; 2. Apply anti-rust oil to screws before storage; 3. Use nylon lock nuts for vibration resistance | Tensile Strength: ≥800MPa; Corrosion Resistance: Salt spray test ≥480h; Thread Standard: M12×1.75 | Shenkai 4" Multi-Ram BOP (Fastening Component) |
4 | DFZ1310.01A-02 | Hydraulic piston: 27SiMn alloy steel (ultra-small); Seal assembly: PU composite; Cylinder liner: 42CrMo alloy steel | 1. Piston seal leakage from hydraulic oil contamination; 2. Cylinder liner wear from micro-contaminants; 3. Corrosion from water ingress in hydraulic system | 1. Check hydraulic oil water content weekly (maintain ≤0.1%); 2. Inspect cylinder liner for micro-scratches annually; 3. Install water separators in hydraulic system reservoirs | Piston Diameter: 85mm; Max Hydraulic Pressure: 31.5MPa; Temperature Range: -20℃~100℃ | Shenkai 4" Multi-Ram BOP (Hydraulic Cylinder) |
5 | DFZ1310.01A-04 | Valve core: 4Cr13 stainless steel (ultra-small); Valve seat: Stellite 6; Gasket: Micro spiral wound gasket (316L+graphite) | 1. Valve core erosion from high-velocity oil flow; 2. Gasket damage during disassembly; 3. Corrosion of valve core in humid environments | 1. Install flow restrictors to limit flow rate ≤7 L/min; 2. Disassemble valves only when necessary (minimize gasket disturbance); 3. Apply anti-corrosion grease to valve components after disassembly | Max Working Pressure: 40MPa; Temperature Range: -20℃~100℃; Valve Port Diameter: 14mm | Shenkai 4" Multi-Ram BOP (Control Valve Assembly) |
6 | DFZ1310.01I.01-00 | Bushing: 42CrMo alloy steel (ultra-small); Retaining ring: 65Mn spring steel (thin); Seal ring: EPDM | 1. Bushing wear from ram reciprocation in narrow clearances; 2. Retaining ring breakage from improper installation; 3. EPDM seal swelling in water | 1. Inspect bushing wear every 200 working hours (replace if wear exceeds 0.08mm); 2. Use precision pliers for retaining ring installation (avoid over-spreading); 3. Select water-resistant EPDM seals (swell rate ≤8%) | Bushing Inner Diameter: 45±0.03mm; Max Working Pressure: 40MPa; Temperature Range: -40℃~150℃ | Shenkai 4" Multi-Ram BOP (Ram Guide Assembly) |
Category 4: 7 5/8" Shenkai Multi-Ram BOP Parts
Product Description: Engineered for Shenkai 7 5/8" multi-ram BOPs, this series addresses large-bore well control pain points—extreme structural stress on components in high-pressure formations, massive seal surface area prone to uneven wear, and corrosion of components in saline-formation drilling fluids. Value Preposition: The heavy-duty structural design with thickened housing (wall thickness ≥55mm) enhances load-bearing capacity. The multi-zone seal design ensures uniform pressure distribution across the 7 5/8" seal surface, improving sealing reliability. Corrosion-resistant zinc-nickel plating extends service life by 50% in offshore or saline environments. Scenario Anchoring: Applicable to onshore deep wells (well depth 4000-6000m), offshore shallow-deep wells, and large-bore production wells utilizing 7 5/8" casing/drill pipes, suitable for high-pressure formations (formation pressure ≤100MPa) and saline-formation environments.
Product Serial Number | Part Number | Material Specification | Main Wear Causes | Usage Precautions | Key Technical Parameters | Applicable BOP Model |
1 | DFZ1310.01Q-00 | Housing: 4140 alloy steel (quenched & tempered, thickened); Ram block: 4130 alloy steel (carburized); Seal assembly: Multi-zone FKM+Inconel 625 skeleton; Connecting pins: 316L stainless steel | 1. Housing fatigue cracking under high pressure; 2. Uneven seal wear across large surface area; 3. Ram block erosion from high-velocity drilling fluid solids | 1. Conduct ultrasonic flaw detection on housing every 6 months per API Spec 16A; 2. Use laser profiling to inspect seal surface wear (replace if wear exceeds 0.25mm); 3. Install high-efficiency solids control equipment to maintain solid content ≤10% | Max Working Pressure: 100MPa; Temperature Range: -20℃~150℃; Matching Casing/Drill Pipe OD: 193.68mm (7 5/8") | Shenkai 7 5/8" Multi-Ram BOP |
2 | DFZ1310.01Q-02 | Guide rail: CuAl10Fe3 bronze (heavy-duty); Piston rod: 40CrNiMoA (hard chrome plating); Seal ring: High-temperature/high-pressure FKM | 1. Guide rail deformation under heavy ram load; 2. Chrome plating wear from hydraulic oil contaminants; 3. Seal degradation under HTHP conditions | 1. Inspect guide rail straightness every 150 working hours (tolerance ≤0.05mm/m); 2. Maintain hydraulic oil cleanliness at NAS 6 level (install 5μm filters); 3. Use HTHP hydraulic oil (ISO VG 68, rated to 150℃) | Max Actuation Pressure: 31.5MPa; Ram Closing Stroke: 115±3mm; Guide Rail Hardness: ≥200 HB | Shenkai 7 5/8" Multi-Ram BOP (Actuation System) |
3 | GB70 M12×65 | Screw: 12.9-grade 42CrMo alloy steel; Surface treatment: Zinc-nickel plating + passivation; Nut: 12.9-grade 40CrNiMoA steel | 1. Thread failure under extreme structural loads; 2. Corrosion of zinc-nickel plating in offshore deepwater environments; 3. Loosening induced by platform vibration | 1. Torque to 85±5 N·m using a hydraulic torque wrench; 2. Inspect plating monthly for damage (touch up with anti-corrosion compound); 3. Use double nuts and thread lock compound for critical fastening positions | Tensile Strength: ≥1200MPa; Corrosion Resistance: Salt spray test ≥2000h; Thread Standard: M12×1.75 | Shenkai 7 5/8" Multi-Ram BOP (Fastening Component) |
4 | DFZ1310.01A-02 | Hydraulic piston: Integral-forged 27SiMn alloy steel; Seal assembly: High-pressure PU+FKM composite; Cylinder liner: 42CrMo alloy steel (honed, Ra ≤0.4μm) | 1. Piston deformation from ultra-high hydraulic pressure; 2. Cylinder liner wear from contaminant particles; 3. Seal leakage under HTHP cycling | 1. Monitor hydraulic system pressure (max 31.5MPa) to avoid overloading; 2. Replace hydraulic oil and filters every 400 working hours; 3. Conduct seal integrity testing after each HTHP cycle | Piston Diameter: 170mm; Max Hydraulic Pressure: 31.5MPa; Cylinder Liner Roughness: Ra ≤0.4μm | Shenkai 7 5/8" Multi-Ram BOP (Hydraulic Cylinder) |
5 | DFZ1310.01A-04 | Valve core: 4Cr13NiMo stainless steel; Valve seat: Stellite 31 alloy; Gasket: High-pressure spiral wound gasket (Inconel 625+graphite) | 1. Severe valve seat erosion from high-velocity, high-pressure oil flow; 2. Gasket compression set under long-term pressure; 3. Corrosion of valve core in sour deepwater environments | 1. Install flow control valves to limit flow rate ≤22 L/min; 2. Replace gaskets after each pressure test; 3. Verify NACE MR0175 compliance for all valve components annually | Max Working Pressure: 100MPa; Temperature Range: -20℃~150℃; Valve Port Diameter: 35mm | Shenkai 7 5/8" Multi-Ram BOP (Control Valve Assembly) |
6 | DFZ1310.01Q.01-00 | Bushing: 42CrMo alloy steel (heavy-duty); Retaining ring: 65Mn spring steel (thickened); Seal ring: High-temperature EPDM | 1. Bushing wear from heavy ram reciprocation; 2. Retaining ring fatigue failure from repeated loading; 3. EPDM seal aging under high downhole temperatures | 1. Inspect bushing wear every 150 working hours (replace if wear exceeds 0.25mm); 2. Replace retaining rings every 300 working hours as preventive maintenance; 3. Use high-temperature EPDM rated to 180℃ | Bushing Inner Diameter: 80±0.03mm; Max Working Pressure: 100MPa; Temperature Range: -40℃~180℃ | Shenkai 7 5/8" Multi-Ram BOP (Ram Guide Assembly) |
Category 5: 6 5/8" Shenkai Multi-Ram BOP Parts
Product Description: Custom-developed for Shenkai 6 5/8" multi-ram BOPs, this series addresses mid-large bore well pain points—seal degradation in medium-high pressure formations, ram misalignment from drilling vibration, and corrosion of components in acidic drilling fluid environments (pH ≤6). Value Preposition: The acid-resistant material selection (316L stainless steel for key components) and corrosion inhibitor-added seals enhance compatibility with acidic fluids. The self-aligning ram design compensates for minor misalignment, reducing seal wear by 35%. All parts are interchangeable with original Shenkai 6 5/8" BOP components, simplifying maintenance. Scenario Anchoring: Applicable to onshore medium-deep wells (well depth 3000-5500m), acidic formation oil/gas wells, and conventional production wells utilizing 6 5/8" drill pipes/casings, suitable for medium-high pressure formations (formation pressure ≤85MPa) and acidic drilling fluid environments.
Product Serial Number | Part Number | Material Specification | Main Wear Causes | Usage Precautions | Key Technical Parameters | Applicable BOP Model |
1 | DFZ1310.01R-00 | Housing: 4140 alloy steel (quenched & tempered); Ram block: 4130 alloy steel (carburized); Seal assembly: FKM composite with acid-resistant inhibitor; Connecting pins: 316L stainless steel | 1. Seal degradation from acidic drilling fluids; 2. Ram block wear from 6 5/8" drill pipe contact; 3. Pin corrosion from acidic formation water | 1. Monitor drilling fluid pH value (maintain ≥6 by adding neutralizer); 2. Inspect ram block surface every 300 working hours (grind if wear exceeds 0.2mm); 3. Clean connecting pins with acid-resistant detergent after well completion | Max Working Pressure: 85MPa; Temperature Range: -20℃~130℃; Matching Drill Pipe/Casing OD: 168.28mm (6 5/8") | Shenkai 6 5/8" Multi-Ram BOP |
2 | DFZ1310.01R-02 | Guide rail: CuAl10Fe3 bronze; Piston rod: 40Cr (hard chrome plating); Seal ring: Acid-resistant FKM | 1. Guide rail wear from ram misalignment; 2. Chrome plating erosion from hydraulic oil contaminants; 3. Seal leakage from pressure surges | 1. Use laser alignment to set ram parallelism (tolerance ≤0.08mm/m); 2. Replace hydraulic oil filters every 600 working hours; 3. Install accumulators to dampen pressure surges (max surge ≤10% of working pressure) | Max Actuation Pressure: 31.5MPa; Ram Closing Stroke: 100±2mm; Guide Rail Hardness: ≥180 HB | Shenkai 6 5/8" Multi-Ram BOP (Actuation System) |
3 | GB70 M12×65 | Screw: 10.9-grade 35CrMo alloy steel; Surface treatment: Zinc-nickel plating + acid-resistant passivation; Nut: 10.9-grade 40Cr steel | 1. Thread wear from repeated assembly/disassembly; 2. Corrosion of zinc-nickel plating in acidic environments; 3. Loosening induced by drilling vibration | 1. Torque to 75±5 N·m in accordance with GB/T 3098.1; 2. Apply acid-resistant anti-rust oil to screws after each use; 3. Use thread lock compound (medium strength) for vibration-prone applications | Tensile Strength: ≥1000MPa; Corrosion Resistance: Acid spray test ≥800h; Thread Standard: M12×1.75 | Shenkai 6 5/8" Multi-Ram BOP (Fastening Component) |
4 | DFZ1310.01A-02 | Hydraulic piston: 27SiMn alloy steel; Seal assembly: PU+acid-resistant FKM composite; Cylinder liner: 42CrMo alloy steel | 1. Piston wear from hydraulic oil contaminants; 2. Cylinder liner scoring from misaligned piston; 3. Seal degradation under high temperature | 1. Maintain hydraulic oil cleanliness at NAS 8 level; 2. Check piston-cylinder coaxiality annually (tolerance ≤0.1mm); 3. Monitor downhole temperature to avoid operation above 130℃ | Piston Diameter: 150mm; Max Hydraulic Pressure: 31.5MPa; Cylinder Liner Roughness: Ra ≤0.8μm | Shenkai 6 5/8" Multi-Ram BOP (Hydraulic Cylinder) |
5 | DFZ1310.01A-04 | Valve core: 4Cr13NiMo stainless steel; Valve seat: Stellite 6 alloy; Gasket: Acid-resistant spiral wound gasket (316L+graphite) | 1. Valve seat erosion from high-velocity oil flow; 2. Gasket wear from repeated valve operation; 3. Corrosion of valve core in acidic fluids | 1. Limit hydraulic oil flow rate within 16 L/min; 2. Replace gaskets every 6 months or 50 valve cycles (whichever comes first); 3. Clean valve interior with acid-resistant inhibitor after well completion | Max Working Pressure: 85MPa; Temperature Range: -20℃~130℃; Valve Port Diameter: 26mm | Shenkai 6 5/8" Multi-Ram BOP (Control Valve Assembly) |
6 | DFZ1310.01R.01-00 | Bushing: 42CrMo alloy steel; Retaining ring: 65Mn spring steel; Seal ring: Acid-resistant EPDM | 1. Bushing wear from ram reciprocation; 2. Retaining ring fatigue from repeated loading; 3. EPDM seal aging from sunlight (onshore BOPs) | 1. Inspect bushing wear every 300 working hours (replace if wear exceeds 0.15mm); 2. Check retaining ring for cracks monthly; 3. Cover BOP with a protective tarp when not in use to avoid sunlight exposure | Bushing Inner Diameter: 70±0.03mm; Max Working Pressure: 85MPa; Temperature Range: -40℃~150℃ | Shenkai 6 5/8" Multi-Ram BOP (Ram Guide Assembly) |
Procurement Guidance
All 4 3/4", 5 3/4", 4", 7 5/8", and 6 5/8" series parts for Shenkai multi-ram BOPs listed in this document are manufactured in strict compliance with API Spec 16A, GB/T 22513, and relevant industry standards. Each product is accompanied by a complete quality inspection certificate and traceability code, ensuring product authenticity, performance reliability, and compliance with well control safety requirements.
When purchasing, we recommend confirming the exact nominal size of your Shenkai multi-ram BOP and the corresponding part number to ensure perfect matching. For special working conditions (such as sour service, acidic formations, offshore deepwater environments), please contact our technical team in advance. Our professionals will provide customized material selection and technical solution support based on your specific drilling scenarios. Choosing genuine matching parts is crucial to ensuring the safe and efficient operation of well control equipment. If you have any needs for product selection, technical consultation, or procurement, please feel free to contact our team. We are committed to providing you with high-quality products and professional services to safeguard your drilling operations.
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