Core Application & Equipment Compatibility
These parts exclusively belong to the shear cylinder assembly of the 4 1/16"-10000psi Coiled Tubing (CT) Blowout Preventer (BOP), a critical subsystem for emergency coiled tubing cutting and well control. Targeting drilling maintenance engineers and procurement teams, they address high-pressure sealing failure, shear mechanism wear, and structural loosening—key risks in 10000psi extreme operations. All comply with API 16A, GB/T standards, ensuring reliable shear performance and sealing integrity.
1. Shear Cylinder Body & Cover Components
These parts form the load-bearing structure of the shear cylinder, withstanding extreme hydraulic pressure during tubing cutting. A drilling team resolved cylinder leakage by replacing the worn shear cylinder body (API 16A compliant) and optimizing fastener torque, avoiding 10+ hours of unplanned downtime in high-pressure emergency scenarios.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 剪切液缸体 (Shear Cylinder Block) | 4R03.06.09 | Forged AISI 4140 alloy steel, heat-treated, anti-corrosion coated, API 16A compliant | High-pressure fatigue; hydraulic fluid erosion; piston friction wear | Use filtered hydraulic oil (≤2μm); inspect inner wall monthly for scratches; lubricate with anti-wear grease |
2 | 70柱塞缸体 (70 Plunger Cylinder Block) | 4R03.06.08 | Alloy steel, hard chrome-plated inner surface, high-pressure resistant | Plunger friction wear; seal extrusion; fluid contamination | Monitor plunger movement smoothness; replace seals every 3 months; clean internal surface after disassembly |
3 | 70剪切液缸盖 (70 Shear Cylinder Cover) | 4R03.06.03 | Alloy steel, precision-machined sealing surface, zinc-nickel plating | Sealing surface scratches; over-torque deformation; high-pressure impact | Deburr surfaces pre-installation; torque bolts uniformly; inspect seal groove for damage |
4 | 70剪切液缸头 (70 Shear Cylinder Head) | 4R03.06.06 | Alloy steel, corrosion-resistant coating, compatible with high-pressure sealing | Thread wear; seal aging; hydraulic fluid corrosion | Apply anti-seize to threads; inspect sealing elements before assembly; replace after 500 actuation cycles |
5 | 70剪切护罩 (70 Shear Shield) | 4R03.06.01 | Sheet steel, anti-corrosion coated, impact-resistant design | External impact damage; atmospheric corrosion; deformation | Inspect for dents weekly; apply anti-rust spray monthly; replace if deformed |
2. Piston & Plunger Rod Components
These parts drive the shear mechanism’s movement, ensuring precise and powerful tubing cutting under high pressure. A drilling site resolved shear piston jamming by replacing worn rods and lubricating components (per API 16A maintenance specs), restoring emergency shear capability and avoiding well control risks.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 70剪切活塞 (70 Shear Piston) | 4R03.06.11 | Alloy steel, integrated seal grooves, hard chrome-plated surface | Reciprocating friction wear; seal groove damage; thermal expansion | Ensure piston concentricity; inspect grooves monthly for burrs; maintain working temperature ≤80℃ |
2 | 70剪切活塞杆 (70 Shear Piston Rod) | 4R03.06.13 | Alloy steel, precision-ground, hard chrome-plated for wear resistance | Bending from misalignment; seal friction wear; high-pressure impact | Align with cylinder during installation; inspect straightness monthly; replace if surface wear exceeds 0.5mm |
3 | 开导向柱塞杆 (Open Guide Plunger Rod) | 4R03.06.10 | Alloy steel, corrosion-resistant coating, precision-machined | Friction wear; fluid contamination; mechanical impact | Lubricate with anti-wear grease; inspect for scratches weekly; avoid contact with sharp objects |
4 | 70关导向柱塞杆 (70 Close Guide Plunger Rod) | 4R03.06.07 | Alloy steel, hard chrome-plated, compatible with high-pressure movement | Reciprocating wear; misalignment stress; seal contact damage | Monitor movement for resistance; replace seals every 3 months; clean surface after use |
5 | 垫圈 (Washer) | 4R03.06.12 | Stainless steel (304), flat washer, corrosion-resistant | Compression deformation; friction wear; moisture corrosion | Inspect for flatness before installation; torque to specified values; replace if deformed |
3. Specialized & Standard Sealing Components
These seals—including Teklan double triangle seals and Glyd Ring—ensure high-pressure sealing integrity for the shear cylinder, critical for 10000psi operations. A team resolved persistent leakage by replacing worn Teklan seals (per manufacturer specs), restoring sealing performance and avoiding hydraulic system contamination.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 特康双三角密封 (Teklan Double Triangle Seal) | RDD200360 | Fluoropolymer composite, high-pressure resistant, -50℃ to 150℃ | High-pressure extrusion; installation damage; thermal aging | Use dedicated installation tools; avoid sharp edges; replace every 3 months |
2 | 特康双三角密封 (Teklan Double Triangle Seal) | PDD401600 | Fluoropolymer composite with rubber core, enhanced sealing | Fluid contamination; compression set; friction wear | Store in clean dry environment; inspect for cracks pre-use; avoid over-compression |
3 | 特康双三角密封 (Teklan Double Triangle Seal) | RDD200350 | Fluoropolymer composite, corrosion-resistant, 10000psi compatible | High-pressure fatigue; chemical corrosion; installation pinching | Ensure proper groove fit; inspect during maintenance; replace after 400 actuation cycles |
4 | 特康双三角密封 (Teklan Double Triangle Seal) | RDD200280 | Fluoropolymer composite, low-friction design | Reciprocating friction; thermal stress; fluid erosion | Lubricate with compatible grease; monitor wear monthly; replace if surface damage occurs |
5 | 特开斯来圈 (Glyd Ring GR4300280) | GR4300280 | Polyurethane + PTFE, multi-function sealing, wear-resistant | Plunger friction; seal deformation; fluid contamination | Replace as complete assembly; filter hydraulic oil to ≤2μm; avoid disassembling |
6 | 柱塞组合密封 (Plunger Composite Seal) | PCG000400-Z2053 | HNBR + PEEK, multi-layer sealing | Layer separation; friction wear; high-pressure extrusion | Install in clean environment; replace every 3 months; avoid over-tightening |
7 | V型叠封 (V-Type Stacked Seal) | C050-224040 Ф36×51×22.5 | Fluororubber (FKM), high-temperature resistant, multi-layer | High-pressure extrusion; thermal aging; installation damage | Use seal installation tool; maintain temperature ≤120℃; replace if layers separate |
8 | O形圈 (O-Ring) | ORAR00435 145.42×6.99 | HNBR, high-pressure resistant, GB/T 3452.1 compliant | Sharp groove nicks; thermal aging; high-pressure extrusion | Deburr seal grooves; store at ≤25℃; use compatible hydraulic oil |
9 | O形圈 (O-Ring) | OR4005000 50×4 | HNBR, oil-resistant, suitable for cylinder sealing | Vibration wear; fluid aging; over-compression | Inspect monthly for cracks; replace during maintenance; store flat |
4. Fasteners, Retaining & Auxiliary Components
These parts secure shear cylinder components and prevent disassembly, ensuring structural stability during high-pressure cutting. A team resolved component loosening by torqueing fasteners per GB/T standards, avoiding mechanical failure in emergency shear operations.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 液缸螺栓 (Cylinder Bolt) | 4R03.06.04 | 10.9-grade alloy steel, zinc-plated, high-torque design | Vibration loosening; thread galling; over-torque damage | Torque to 450N·m; apply anti-seize compound; inspect monthly for looseness |
2 | 液缸螺钉 (Cylinder Screw) | 4R03.06.05 | 8.8-grade alloy steel, hexagon socket head, corrosion-resistant | Fluid corrosion; thread wear; vibration fatigue | Torque to 45N·m; clean threads after use; replace if deformation occurs |
3 | 内六角圆柱头螺钉 (Hex Socket Cylinder Head Screw) | GB/T70.1 M8×25 | 10.9-grade alloy steel, zinc-plated, GB/T 70.1 compliant | Over-torque thread stripping; fluid corrosion; vibration fatigue | Torque to 25N·m; use compatible socket tool; apply anti-seize |
4 | 盖形螺母 (Cap Nut) | GB/T923 M27 | Alloy steel, zinc-plated, protective cap, GB/T 923 compliant | Cap damage; thread wear; moisture corrosion | Torque to 220N·m; inspect cap integrity monthly; replace if cracked |
5 | 螺塞NPT1/4" (Plug NPT1/4") | 2S48.03.13 | Brass, NPT thread, with O-ring seal | Thread wear; seal aging; over-torque damage | Torque to 35N·m; inspect O-ring monthly; apply anti-seal tape |
6 | 挡圈 (Retaining Ring) | BH5801600 160×5.8×2.5 | Carbon steel, heat-treated, external snap ring | Installation damage; deformation; high-pressure stress | Use snap ring pliers; inspect groove fit; replace if tension is lost |
7 | 挡圈 (Retaining Ring) | GB893.2 52 | Stainless steel (304), internal snap ring, GB/T 893.2 compliant | Moisture corrosion; installation damage; friction wear | Store in dry environment; inspect for cracks; replace if bent |
8 | 挡圈 (Retaining Ring) | BU3100500 | Stainless steel (304), internal snap ring | Corrosion; installation damage; high-pressure deformation | Inspect before installation; use proper tools; replace if damaged |
9 | 内六角平端紧定螺钉 (Hex Socket Flat End Set Screw) | GB/T M6×8 | 8.8-grade alloy steel, zinc-plated, anti-loosening | Thread wear; vibration loosening; over-torque damage | Torque to 8N·m; apply anti-seize; inspect monthly for looseness |
FAQ
Question | Answer |
How to maintain Glyd Ring and Teklan seals for shear cylinder longevity? | Store in clean, dry environment (≤25℃) away from sunlight and chemicals; use dedicated tools to avoid installation damage. Replace Teklan seals every 3 months/400 cycles and Glyd Rings every 4 months/500 cycles. Ensure hydraulic oil compatibility to prevent degradation. |
What torque standards apply to fasteners in this shear cylinder assembly? | Follow GB/T standards for torque values: M8 screws (25N·m), M27 cap nuts (220N·m), NPT1/4" plugs (35N·m), and 10.9-grade cylinder bolts (450N·m). Torque uniformly and apply anti-seize compound to threads to ensure structural integrity in 10000psi operations. |
Procurement Guidance
Genuine parts for the 4 1/16"-10000psi CT BOP shear cylinder assembly ensure compliance with API 16A and GB/T standards, critical for reliable emergency tubing cutting and high-pressure sealing. Whether for seal replacements, piston maintenance, or fastener upgrades, we provide authentic parts matching original specifications. Contact our team with your operational needs for tailored recommendations and professional technical support to maintain optimal shear cylinder performance.
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