Core Application & Equipment Compatibility
These parts cover the balance valve, upper/lower plug, and full-closure/shear/slip/half-closure ram assemblies of the 4 1/16"-10000psi Coiled Tubing (CT) BOP. Critical for pressure regulation, well sealing, and emergency tubing control, they cater to drilling maintenance engineers and procurement teams. All comply with API 16A and GB/T standards, ensuring reliable performance in 10000psi high-pressure coiled tubing operations.
1. Balance Valve Assembly (4R03.15.00)
This assembly maintains hydraulic system balance, preventing pressure surges that damage BOP components. A drilling team resolved valve leakage by replacing worn valve core and seals (per API 16A), restoring pressure stability and avoiding 6+ hours of unplanned downtime in high-pressure operations.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 平衡阀芯 (Balance Valve Core) | 4R03.15.01 | Stainless steel (316), precision-machined, corrosion-resistant | Fluid contamination wear; pressure surge impact; seal friction | Filter hydraulic oil to ≤2μm; inspect for scratches monthly; replace after 500 actuation cycles |
2 | 螺母 (Nut) | GB/T 6173 M16×1.5 | Alloy steel, zinc-plated, GB/T 6173 compliant | Thread galling; vibration loosening; over-torque damage | Torque to 120N·m; apply anti-seize compound; inspect monthly for looseness |
3 | 平衡阀座 (Balance Valve Seat) | 4R03.15.02 | Alloy steel with PTFE lining, high-pressure sealing | Valve core friction; seal aging; fluid erosion | Replace with valve core; inspect sealing surface for wear; clean before assembly |
4 | O形圈 (O-Ring) 9.25×1.78 | 9.25×1.78 | HNBR, oil-resistant, GB/T 3452.1 compliant | Sharp edge damage; thermal aging; over-compression | Deburr valve seat groove; store at ≤25℃; replace every 3 months |
5 | 承托环 (Support Ring) C663-22 Ф9.5×Ф12.1×1.4 | C663-22 Ф9.5×Ф12.1×1.4 | PTFE, wear-resistant, high-temperature resistant | Friction wear; pressure extrusion; chemical corrosion | Ensure proper groove fit; replace with O-ring; avoid contact with corrosive fluids |
6 | O形圈 (O-Ring) 24.99×3.53 | 24.99×3.53 | HNBR, high-pressure resistant, -40℃ to 120℃ | High-pressure extrusion; thermal aging; groove scratches | Inspect groove for burrs; torque valve core uniformly; replace if cracks occur |
7 | 承托环 (Support Ring) Ф25×Ф30.4×1.4 | Ф25×Ф30.4×1.4 | PTFE, low-friction, corrosion-resistant | Reciprocating friction; pressure deformation; fluid contamination | Clean before installation; monitor valve operation; replace after 400 cycles |
8 | O形圈 (O-Ring) 20.3×2.62 | 20.3×2.62 | HNBR, oil-resistant, compatible with hydraulic fluids | Vibration wear; fluid aging; over-compression | Store flat to prevent deformation; inspect monthly; replace during routine maintenance |
9 | 承托环 (Support Ring) Ф20×Ф24×1.4 | Ф20×Ф24×1.4 | PTFE, pressure-resistant, wear-resistant | Friction wear; extrusion damage; thermal stress | Avoid over-tightening; maintain working temperature ≤80℃; replace with O-ring |
2. Upper Plug Assembly (4R03.05.00)
This assembly seals the top of the BOP, preventing high-pressure fluid leakage and protecting internal components. Aligned with API 16A, it ensures structural integrity in extreme pressure scenarios, minimizing well control risks during coiled tubing operations.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 顶部连接法兰 (Top Connecting Flange) | 4R03.05.01 | Alloy steel, precision-machined, anti-corrosion coated | Flange surface wear; bolt hole deformation; high-pressure stress | Ensure alignment during installation; torque bolts uniformly; inspect for scratches |
2 | 护丝 (Thread Protector) | 4R03.05.02 | Engineering plastic, impact-resistant, corrosion-resistant | Mechanical impact; atmospheric aging; thread wear | Install when BOP is idle; inspect for cracks monthly; replace if damaged |
3 | 顶部护套 (Top Shield) | 4R03.05.03 | Sheet steel, anti-corrosion coated, impact-resistant | External impact; corrosion; deformation | Inspect for dents weekly; apply anti-rust spray monthly; replace if deformed |
4 | NPT 1/2" 内六角螺塞 (NPT 1/2" Hex Socket Plug) | 2C01.36 | Brass, NPT thread, with O-ring seal | Thread wear; seal aging; over-torque damage | Torque to 30N·m; inspect O-ring monthly; apply anti-seal tape |
5 | O形圈 (O-Ring) | ORAR00433 | HNBR, high-pressure resistant, 10000psi compatible | Sharp groove nicks; thermal aging; fluid corrosion | Deburr plug groove; store in clean environment; replace every 3 months |
6 | 挡圈 (Retaining Ring) | BBP80B433 | Stainless steel (304), snap ring design | Installation damage; snap ring deformation; moisture corrosion | Use snap ring pliers; inspect for tension; replace if bent |
3. Lower Plug Assembly (4R03.10.00)
This assembly seals the BOP’s bottom, preventing fluid leakage and safeguarding wellbore integrity. A drilling site resolved leakage by replacing worn O-ring and retaining ring (per GB/T standards), restoring sealing performance and avoiding environmental and operational risks.
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 底部连接法兰 (Bottom Connecting Flange) | 4R03.10.01 | Alloy steel, zinc-nickel plated, API 16A compliant | High-pressure fatigue; fluid erosion; bolt hole wear | Inspect flange surface monthly; torque bolts to specs; replace after 12 months |
2 | 底部护丝 (Bottom Thread Protector) | 4R03.10.02 | Engineering plastic, wear-resistant, impact-resistant | Mechanical impact; ground contact wear; aging | Install during transportation/storage; inspect for wear; replace if cracked |
3 | 螺母 (Nut) | 4R03.10.03 | Alloy steel, heat-treated, high-torque design | Thread wear; vibration loosening; over-torque damage | Torque to specified values; apply anti-seize; inspect monthly |
4 | 底部堵头 (Bottom Plug) | 4R03.10.04 | Alloy steel, hard chrome-plated, high-pressure sealing | Seal groove damage; fluid corrosion; mechanical impact | Inspect groove for burrs; clean before assembly; replace seals quarterly |
5 | 内六角螺塞 (Hex Socket Plug) | 2C01.36 | Brass, corrosion-resistant, with O-ring seal | Thread wear; seal aging; fluid contamination | Torque to 30N·m; replace O-ring monthly; apply anti-seal tape |
6 | O形圈 (O-Ring) | ORAR00433 | HNBR, oil-resistant, high-pressure compatible | Over-compression; thermal aging; groove scratches | Deburr plug groove; store at ≤25℃; replace during maintenance |
7 | 挡圈 (Retaining Ring) | BBP80B433 | Stainless steel (304), internal snap ring | Installation damage; corrosion; tension loss | Use proper installation tools; inspect for cracks; replace if deformed |
4. Ram Assemblies
Ram assemblies are core to BOP well control: full-closure/half-closure seal the wellbore, shear cuts tubing emergently, and slip secures tubing. All comply with API 16A, and a team resolved sealing failure by replacing worn rubber cores, restoring well integrity in high-pressure operations.
4.1 Full-Closer Ram Assembly (4R03.01A.00)
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 顶部胶芯 (Top Rubber Core) | 4R03.01A.02 | Nitrile rubber, high-pressure resistant, wear-resistant | Compression set; thermal aging; mechanical impact | Inspect for cracks pre-use; replace after 300 closing cycles; store in cool environment |
2 | 全封闸板体 (Full-Closer Ram Body) | 4R03.01A.01 | Alloy steel, heat-treated, anti-corrosion coated | Friction wear; high-pressure stress; fluid corrosion | Lubricate with anti-wear grease; inspect for deformation; replace after 12 months |
3 | 前部胶芯 (Front Rubber Core) | 4R03.01A.03.00 | Nitrile rubber, enhanced sealing, high-pressure compatible | Tubing abrasion; compression fatigue; thermal aging | Replace with top rubber core; inspect sealing surface; avoid contact with sharp objects |
4 | 螺钉 (Screw) GB/T 70.1 M4×10 | GB/T 70.1 M4×10 | 8.8-grade alloy steel, zinc-plated, GB/T 70.1 compliant | Over-torque stripping; vibration loosening; corrosion | Torque to 3N·m; apply anti-seize; inspect monthly |
5 | 定位键 (Positioning Key) | 4R03.10.04 | Alloy steel, precision-machined, shear-resistant | Shear damage; friction wear; misalignment stress | Ensure proper fit; inspect for shear marks; replace if deformed |
6 | 导向键 (Guide Key) | 4R03.01A.05.00 | Alloy steel, wear-resistant, corrosion-resistant | Friction wear; misalignment; fluid corrosion | Lubricate monthly; inspect for straightness; replace if worn |
4.2 Shear Ram Assembly (4R03.01B.00)
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 左剪切闸板体 (Left Shear Ram Body) | 4R03.01B.01 | Alloy steel, heat-treated, high-strength | Shear impact; friction wear; high-pressure stress | Inspect after each shear operation; lubricate with anti-wear grease; replace after 50 shear cycles |
2 | 内六角沉头螺钉 (Hex Socket Countersunk Head Screw) GB/T 70.3 M10×20 | GB/T 70.3 M10×20 | 10.9-grade alloy steel, zinc-plated, GB/T 70.3 compliant | Over-torque damage; vibration loosening; fluid corrosion | Torque to 45N·m; apply anti-seize; inspect after shear operations |
3 | 剪切刀板 (Shear Blade) | 4R03.01B.02 | Alloy steel, hardened, sharp cutting edge | Cutting edge wear; impact damage; corrosion | Inspect edge sharpness after use; replace after 20 shear cycles; avoid cutting hardened tubing |
4 | 右剪切闸板体 (Right Shear Ram Body) | 4R03.01B.03 | Alloy steel, heat-treated, anti-corrosion coated | Shear impact; friction wear; fluid erosion | Match with left ram body; inspect for deformation; replace after 50 shear cycles |
5 | 螺钉 (Screw) GB/T 70.1 M4×10 | GB/T 70.1 M4×10 | 8.8-grade alloy steel, zinc-plated | Thread wear; vibration loosening; over-torque | Torque to 3N·m; apply anti-seize; inspect monthly |
6 | 定位键 (Positioning Key) | 4R03.01B.04 | Alloy steel, precision-machined | Shear stress; friction wear; misalignment | Ensure proper fit; inspect for shear marks; replace if damaged |
4.3 Slip Ram Assembly (4R03.01C.00)
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 卡瓦 (Slip) | 4R03.01C.02 | Alloy steel teeth with rubber lining, high-grip | Tooth wear; rubber lining aging; tubing abrasion | Inspect teeth weekly; replace rubber lining every 3 months; avoid over-gripping |
2 | 卡瓦闸板体 (Slip Ram Body) | 4R03.01C.01.00 | Alloy steel, anti-corrosion coated, high-strength | Friction wear; high-pressure stress; fluid corrosion | Lubricate monthly; inspect for deformation; replace after 12 months |
3 | 圆柱销 (Cylindrical Pin) GB/T 119.1 10h8×45 | GB/T 119.1 10h8×45 | Stainless steel (304), precision-machined, GB/T 119.1 compliant | Shear damage; friction wear; corrosion | Ensure proper fit; inspect for straightness; replace if bent |
4 | 螺钉 (Screw) GB/T 70.1 M4×10 | GB/T 70.1 M4×10 | 8.8-grade alloy steel, zinc-plated | Vibration loosening; thread wear; over-torque | Torque to 3N·m; apply anti-seize; inspect monthly |
5 | 定位键 (Positioning Key) | 4R03.01B.04 | Alloy steel, shear-resistant | Misalignment stress; friction wear; shear damage | Align with ram body; inspect for wear; replace if damaged |
4.4 Half-Closer Ram Assembly (4R03.01D.00)
No. | Name | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | 2"闸板体 (2" Ram Body) | 4R03.01D.01 | Alloy steel, heat-treated, anti-corrosion coated | Friction wear; high-pressure stress; fluid erosion | Lubricate with anti-wear grease; inspect for deformation; replace after 12 months |
2 | 2"前部胶芯 (2" Front Rubber Core) | 4R03.01D.03 | Nitrile rubber, tubing-matched, high-pressure sealing | Tubing abrasion; compression fatigue; thermal aging | Replace with top rubber core; inspect sealing surface; avoid sharp tubing edges |
3 | 2"闸板导向叶片 (2" Ram Guide Vane) | 4R03.01D.04 | Alloy steel, wear-resistant, precision-machined | Friction wear; misalignment; fluid corrosion | Lubricate monthly; inspect for straightness; replace if worn |
4 | 内六角沉头螺钉 (Hex Socket Countersunk Head Screw) GB/T70.3 M8×16 | GB/T70.3 M8×16 | 10.9-grade alloy steel, zinc-plated, GB/T 70.3 compliant | Over-torque damage; vibration loosening; corrosion | Torque to 25N·m; apply anti-seize; inspect monthly |
5 | 顶部胶芯 (Top Rubber Core) | 4R03.01A.02 | Nitrile rubber, high-pressure resistant | Compression set; thermal aging; mechanical impact | Inspect for cracks pre-use; replace after 300 closing cycles; store cool |
6 | 螺钉 (Screw) GB/T 70.1 M4×10 | GB/T 70.1 M4×10 | 8.8-grade alloy steel, zinc-plated | Thread wear; vibration loosening; over-torque | Torque to 3N·m; apply anti-seize; inspect monthly |
7 | 定位键 (Positioning Key) | 4R03.01B.04 | Alloy steel, shear-resistant | Misalignment stress; friction wear; shear damage | Ensure proper fit; inspect for wear; replace if damaged |
8 | 导向键 (Guide Key) | 4R03.01A.05.00 | Alloy steel, corrosion-resistant | Friction wear; misalignment; fluid corrosion | Lubricate monthly; inspect for straightness; replace if worn |
FAQs
Question | Answer |
What is the maintenance cycle for rubber cores in ram assemblies? | Replace rubber cores (top/front) every 3 months or 300 closing cycles, whichever comes first. Inspect for cracks, compression set, and abrasion before each use. Store in cool, dry environment (≤25℃) to avoid thermal aging. |
How to ensure sealing integrity of plug and valve assemblies? | Follow GB/T torque standards for fasteners; replace O-rings monthly and retaining rings if deformed. Use clean hydraulic oil (filtered to ≤2μm) and inspect sealing surfaces for scratches. Apply anti-seal tape to NPT plugs and anti-seize to threads. |
Procurement Guidance
Genuine parts for these 4 1/16"-10000psi CT BOP assemblies ensure compliance with API 16A and GB/T standards, critical for pressure regulation, well sealing, and emergency control. Whether for valve maintenance, plug sealing, or ram core replacement, we provide authentic parts matching original specifications. Contact our team for tailored recommendations and professional technical support to maintain optimal BOP performance.
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