1. Core Purpose & Application Overview
This documentation covers a full range of Bomco drawworks models, including JC-15, JC-30, JC-40, JC-50, JC-70, JC-80, and JC-90 series. Tailored for oilfield drilling contractors and well construction teams, it addresses model mismatch and maintenance pain points. API 7K-compliant, these drawworks suit 15~90 ton-class onshore/offshore operations, ensuring stable load handling and minimized downtime.
2. Classified Model List & Technical Details
2.1 15-Ton Class Bomco Drawworks
Ideal for shallow well drilling (0~1500m), these models (JC-15 series) solve low-load operational inefficiency. Lightweight and compact, they fit limited-space wellsites, with API 7K-compliant components ensuring durability. Critical for small-scale oilfield projects, they reduce maintenance costs via wear-resistant designs.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-15D, JC-15DB5, JC-15DB6, JC-15DB7, JC-15DB8 | Q355B steel frame, 42CrMo gear train (API 7K) | 1. Gear wear from insufficient lubrication; 2. Seal deterioration from wellsite moisture. | 1. Use API 5GL lubricant, change every 1000 hours; 2. Apply anti-rust coating to seals monthly. |
2.2 30-Ton Class Bomco Drawworks
Optimized for medium-shallow wells (0~2000m), these models (JC-30 series) resolve moderate-load gearbox fatigue. Equipped with DWS-series auxiliary brakes, they comply with API 8C safety standards, ensuring reliable braking in high-vibration scenarios. Perfect for onshore conventional oil wells.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-30B, JC-30B3, JC-30DBl, JC-30DB5 | Hard chrome-plated drum, galvanized steel wire rope (API 9A) | 1. Drum groove wear from rope friction; 2. Brake pad wear from frequent use. | 1. Align rope with drum grooves; 2. Replace brake pads when thickness <5mm (API 7K recommendation). |
2.3 40-Ton Class Bomco Drawworks
Designed for medium-deep wells (0~2500m), these models (JC-40 series) address high-torque gear wear. Featuring reinforced gearboxes and hydraulic speed control (ISO 4401), they handle continuous operation, reducing unplanned downtime. Ideal for oilfields with frequent load fluctuations.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-40B6, JC-40B7, JC-40B9, JC-40B12, JC-40B13, JC-40B14, JC-40B15 | Alloy steel gear train, SAE 100R13 hydraulic hoses | 1. Hydraulic valve wear from oil contamination; 2. Fastener loosening from vibration. | 1. Filter hydraulic oil every 500 hours; 2. Retorque fasteners per API RP 7G (every 300 hours). |
2 | JC-40DB2, JC-40DBT, JC-40DB4, JC-40DBT1, JC-40DB5, JC-40DB6 | Same as above, plus DWS40 auxiliary brake (API 7K) | 1. Brake hydraulic leakage; 2. Gear fatigue from overload. | 1. Inspect brake seals monthly; 2. Avoid exceeding 40-ton rated load. |
2.4 50-Ton Class Bomco Drawworks
These models (JC-50 series) excel in deep wells (0~3000m), solving heavy-load structural fatigue. Compliant with API 7K and ISO 1219, they feature sand drum options for sand-prone formations, ensuring versatile operation. Critical for large-scale oilfield projects requiring high reliability.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-50B5, JC-50B9, JC-50B13, JC-50B14, JC-50B15 | 42CrMo alloy steel, 316L stainless steel pressure components | 1. Rod wear from formation fluid corrosion; 2. Gearbox overheating from prolonged use. | 1. Apply anti-corrosion treatment to rods; 2. Monitor gearbox temperature (max 60℃). |
2 | JC-50D7, JC-50D11 | Same as above, sand drum with anti-abrasion lining | 1. Sand drum lining abrasion; 2. Wet sand corrosion. | 1. Screen sand to remove large particles; 2. Clean drum after use. |
3 | JC-50DB2, JC-50DB8, JC-50DB10, JC-50DB11, JC-50DB12, JC-50DB16 | Same as above, DWS50 auxiliary brake | 1. Brake pad glazing from overheating; 2. Electrical component failure in hazardous zones. | 1. Avoid continuous braking; 2. Use ATEX-certified electrical parts (Zone 1 compliance). |
2.5 70-Ton Class Bomco Drawworks
Engineered for ultra-deep wells (0~4000m), these models (JC-70 series) handle extreme loads. Equipped with DWS70 brakes and reinforced frames, they comply with API 7K and API 8C, resolving high-pressure and high-vibration wear. Ideal for offshore and onshore heavy-duty drilling.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-70B8, JC-70B12, JC-70B13, JC-70B15 | High-strength alloy steel frame, SKF bearings | 1. Bearing wear from insufficient lubrication; 2. Frame deformation from uneven loading. | 1. Use synthetic lubricant for bearings; 2. Ensure level installation (API RP 7G). |
2 | JC-70D2, JC-70D9, JC-70D10, JC-70D11, JC-70D12, JC-70D14 | Same as above, large-capacity sand drum | 1. Sand drum shaft wear; 2. Hydraulic system pressure spikes. | 1. Lubricate shaft weekly; 2. Install pressure relief valve (100MPa max). |
3 | JC-70DB9, JC-70DB12 | Same as above, enhanced brake system | 1. Brake hydraulic line abrasion; 2. Gear wear from torque fluctuations. | 1. Use hose protectors; 2. Operate at steady torque to avoid fluctuations. |
2.6 80-Ton Class Bomco Drawworks
These heavy-duty models (JC-80 series) suit ultra-deep wells (0~4500m), solving extreme-load gear and brake wear. API 7K-compliant with explosion-proof components, they ensure safety in high-pressure, flammable environments. Critical for complex oilfield projects with strict reliability requirements.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-80D, JC-80DB, JC-80DB1 | Titanium alloy-reinforced gearbox, ATEX-certified electrical parts | 1. Gear fatigue from continuous heavy loads; 2. Brake overheating in long operations. | 1. Rotate shifts to reduce gear stress; 2. Use forced cooling for brakes. |
2.7 90-Ton Class Bomco Drawworks
Top-tier models (JC-90 series) for super-deep wells (0~5000m), addressing maximum-load structural and component wear. Compliant with API 7K and ISO 13628, they feature advanced hydraulic control and wear-resistant materials, ensuring long-term operation in harsh conditions. Ideal for offshore deepwater drilling.
No. | Model(s) | Material/Standard | Main Wear Causes | Damage Prevention Notes |
1 | JC-90DB4, JC-90DB5, JC-90DB6, JC-90DB3 | Nickel-chromium alloy steel, marine-grade anti-corrosion coating | 1. Frame corrosion from saltwater (offshore); 2. Bearing failure from high torque. | 1. Touch up anti-corrosion coating quarterly; 2. Inspect bearings every 200 hours. |
2 | JC-90D | Same as above, enhanced sand-handling system | 1. Sand-handling system clogging; 2. Hydraulic pump wear. | 1. Clean sand filters daily; 2. Replace pump seals every 800 hours. |
3. On-Site Fault Repair Case
Case: JC-70DB12 Gearbox Wear in Ultra-Deep Well Drilling
Scenario: During 4000m drilling, the JC-70DB12’s gearbox overheated and emitted noise. Root Cause: Insufficient lubrication (violating API 5GL) caused 42CrMo gear wear. Repair: Replaced gears, flushed the gearbox, and refilled with synthetic lubricant. Prevention: Set automated lubrication reminders and monitor oil viscosity weekly.
4. FAQ
Question | Answer |
How to select the right Bomco drawworks model for my well depth? | Choose 15~30-ton models for 0~2000m shallow/medium wells, 40~50-ton for 2000~3000m deep wells, 70~80-ton for 3000~4500m ultra-deep wells, and 90-ton for 4500~5000m super-deep wells. Prioritize sand drum models for sand-prone formations. |
What lubricant grade is suitable for Bomco JC-series drawworks? | Use API 5GL lubricant for gearboxes (ISO VG 46 for 15~50-ton models, ISO VG 68 for 70~90-ton models). Hydraulic systems require ISO VG 46 anti-wear oil (ISO 6743/4), replaced every 500~1000 hours based on load. |
5. Procurement Guidance & Call to Action
Bomco JC-series drawworks (15~90 ton-class) are API 7K-compliant solutions for all well depths and formation types. They resolve load mismatch, wear, and safety pain points, with tailored designs for onshore/offshore operations. Each model meets strict material and safety standards, ensuring reliable performance.
We provide genuine Bomco parts, model compatibility checks, and technical support to optimize your procurement and maintenance. Our team offers personalized advice based on well depth, formation, and operational needs, ensuring you select the right model for maximum efficiency.
Choose Bomco drawworks for durable, safe, and efficient drilling. Contact us today to discuss your project’s requirements. We will tailor a solution to align with your operational goals, backed by compliance with global oilfield standards and a commitment to quality.
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