Core Purpose Description
This document supplements spare parts for BOMCO (Baoji Oilfield Machinery Co., Ltd.) drawworks series (JC-90, JC-70, JC-50, JC-40 and their DB/D variants), covering air control extension components, hydraulic disc brake systems, fasteners, and miscellaneous consumables. These parts are fully compatible with the aforementioned BOMCO drawworks models, tailored for oilfield drilling enterprises, drilling rig maintenance service providers, and equipment rental companies. They address pain points of brake failure, air control inaccuracy, and sealing performance degradation caused by harsh drilling environments (high pressure, vibration, dust, corrosion) and long-term high-load operation. All products comply with API Spec 7K "Drilling and Well Servicing Equipment" and GB/T 23505-2009 "Drilling Rig Drawworks" standards, ensuring the stable operation of drawworks key systems (air control, hydraulic brake) and providing reliable technical support for safe and efficient drilling operations.
1. Air Control System Extension Components
This category includes air cylinders, flame-retardant air hoses, and anti-clash valves, which are key components for the precise control of drawworks clutches and brakes. They solve pain points of slow response, air leakage, and safety hazards in air control systems under high-pressure and flammable drilling environments. Suitable for BOMCO JC series drawworks air control system upgrading and maintenance.
No. | Product Name | Model/ Part No. | Material | Main Wear Causes | Damage Prevention Precautions |
1 | Cutting Sleeve | AF700208-030118 (Size: 10) | 20# carbon steel (surface galvanizing); Inner wall: precision grinding | 1. Inner wall wear caused by long-term friction with the pipeline; 2. Corrosion and rust caused by humid and dusty drilling environment | 1. Avoid excessive pipeline pulling during installation, ensure the sleeve and pipeline fit tightly; 2. Regularly clean the sleeve surface, apply anti-rust oil, and replace if galvanized layer falls off |
2 | Tapering Ring | AF700208-030125 (Size: 10), AF70028-030126 (Size: 16) | 65Mn steel (heat treatment); Taper surface: polishing | 1. Taper surface wear caused by repeated assembly and disassembly; 2. Deformation caused by excessive clamping force | 1. Use a torque wrench to control the clamping force during installation (15-20N·m for Size 10, 25-30N·m for Size 16); 2. Check the taper surface for scratches regularly, and grind and repair if necessary |
3 | Nut | AF700208-030113 (M22X1.5) | 45# carbon steel (heat treatment); Thread: precision rolling | 1. Thread wear caused by repeated disassembly and assembly; 2. Thread loosening caused by drawworks vibration | 1. Apply Loctite 243 lock glue during installation to enhance anti-loosening performance; 2. Check the thread completeness regularly, and replace the nut if thread damage or sliding occurs |
4 | Quick Acting Coupling | QKD-L6 (Part No.: 520901041700320400) | Housing: 304 stainless steel; Valve Core: copper alloy; Seal Ring: nitrile rubber | 1. Seal ring wear and air leakage caused by frequent plugging and unplugging; 2. Valve core jamming caused by dust and moisture in the air | 1. Clean the coupling interface before plugging and unplugging, avoid mixing impurities; 2. Cover the interface with a dust cap when not in use, and replace the seal ring every 6 months |
5 | Flame Retardant Air Hose Assy. | O10I X 21.5 (Part No.: 140507050101000001) | Inner Tube: flame-retardant nitrile rubber; Reinforcement Layer: high-strength steel wire braid; Outer Cover: flame-retardant neoprene rubber | 1. Hose cracking caused by high pressure and frequent bending; 2. Outer cover aging and damage caused by high temperature and oil contamination | 1. Avoid excessive bending (minimum bending radius ≥ 8 times the hose diameter), and ensure the working pressure ≤ rated pressure; 2. Avoid contact with high-temperature components and oil stains, and replace every 18 months |
6 | Two Position Air Cylinder | QGA,50X25-00A (Part No.: 512706021305000256) | Cylinder Tube: 304 stainless steel; Piston: aluminum alloy (with wear-resistant coating); Seal Ring: fluororubber | 1. Piston seal wear and air leakage caused by impure compressed air; 2. Cylinder rod corrosion caused by humid environment | 1. Install an air filter and dryer in the air circuit to ensure air cleanliness (ISO 8573-1 Class 4-4-3); 2. Apply anti-corrosion grease on the cylinder rod, and install a dust cover at the rod end |
7 | Three-Position Air Cylinder | QG3, 105X30-00 (Part No.: 512706022010500300) | Cylinder Tube: 304 stainless steel; Piston: aluminum alloy; Valve Core: copper alloy; Seal Ring: fluororubber | 1. Valve core wear and positioning inaccuracy caused by long-term frequent switching; 2. Air leakage caused by seal ring aging in high-temperature environment | 1. Reduce unnecessary frequent switching operations, and check the positioning accuracy regularly; 2. Use high-temperature resistant seal rings, and control the operating temperature ≤ 80℃ |
8 | Anti-Clash Valve | FP-L6A (Part No.: 5127040702000050000) | Valve Body: aluminum alloy (anodized); Spool: 45# carbon steel (quenched and tempered); Seal Ring: nitrile rubber | 1. Spool jamming caused by dust and metal particles in the air; 2. Seal ring damage caused by pressure impact | 1. Install a precision filter at the valve inlet, and clean the valve body every 3 months; 2. Install a pressure buffer valve to avoid sudden pressure changes, and check the valve opening and closing flexibility regularly |
2. Hydraulic Disc Brake System Components
This series of components is the core of drawworks safety braking, featuring high pressure resistance and reliable braking performance. They solve pain points of brake failure, weak braking force, and poor sealing in high-pressure hydraulic systems. Suitable for BOMCO JC series drawworks hydraulic disc brake system (Drawing No.: PS903402-00B1) maintenance and replacement.
No. | Product Name | Model/ Part No. | Material | Main Wear Causes | Damage Prevention Precautions |
1 | Washer | T001-1702 (O6 X 18) | Q235B carbon steel (galvanized); Surface: smooth grinding | 1. Deformation caused by excessive clamping force; 2. Corrosion caused by hydraulic oil contamination and humid environment | 1. Control the clamping torque during installation (10-15N·m), avoid over-tightening; 2. Check the washer surface for rust regularly, and replace if corrosion is found |
2 | Copper Washer | T001-1701 | Red copper (pure copper); Surface: annealing treatment | 1. Deformation and loss of sealing performance caused by repeated compression; 2. Oxidation caused by long-term contact with air | 1. Replace the copper washer every time it is disassembled, and avoid repeated use; 2. Store in a sealed and dry environment to prevent oxidation |
3 | High Pressure Hose | 13I (Part No.: 140507021301000013), 16II (Part No.: 140507021602000013), 6I (Part No.: 140507020601000013) | Inner Tube: high-pressure resistant nitrile rubber; Reinforcement Layer: multi-layer steel wire braid; Outer Cover: wear-resistant and anti-corrosion rubber | 1. Hose burst caused by exceeding the rated pressure and long-term high-pressure operation; 2. Interface leakage caused by seal ring aging | 1. Ensure the working pressure ≤ 10MPa (consistent with the pressure gauge range), and avoid bending near the interface; 2. Replace the hose every 24 months, and check the interface seal ring regularly |
4 | O-Ring | 16X2.4 (Part No.: 530301190160024001), 20X2.4 (Part No.: 530301170240024001), 8X1.9 (Part No.: 530301170240024001) | Nitrile rubber (NBR); Hardness: 70±5 Shore A; Comply with HG/T 2579-2008 standard | 1. Aging and cracking caused by high temperature and hydraulic oil erosion; 2. Damage caused by improper installation (scratching by sharp edges) | 1. Control the hydraulic system temperature ≤ 80℃, and use hydraulic oil that meets the specification; 2. Remove sharp edges at the installation position, and apply a thin layer of hydraulic oil on the O-ring before installation |
5 | Quick Acting Coupling Assy. | NPT1/4 (PAV06), NPT3/8 (PAV1.1010.012/013), NPT1/2 (PAV13) (Part No.: 520901040906060120, 520901040910100120, 520901040913130120) | Housing: 304 stainless steel; Valve Core: copper alloy; Seal Ring: fluororubber | 1. Seal ring wear and hydraulic oil leakage caused by frequent plugging and unplugging; 2. Valve core jamming caused by hydraulic oil impurities | 1. Clean the coupling interface before plugging and unplugging, and filter the hydraulic oil (NAS 7 level); 2. Cover the interface with a dust cap when not in use, and replace the seal ring every 6 months |
6 | Pressure Gauge | YN-60ZT (0-10MPA) (Part No.: 380202012102506006) | Case: 304 stainless steel; Dial: aluminum alloy; Bourdon Tube: copper alloy; Shockproof filling: silicone oil | 1. Bourdon tube damage caused by pressure impact; 2. Pointer jamming caused by drawworks vibration | 1. Install a pressure buffer valve at the gauge inlet to avoid sudden pressure changes; 2. Fix the gauge with a shock-absorbing bracket, and calibrate every 6 months according to JJG 52-2013 standard |
3. General Fasteners & Sealing Components
This category includes vent plugs, oil seals, circlips, and groove screws, providing reliable sealing and fixing functions for drawworks rotating parts and static interfaces. They solve pain points of oil leakage, component loosening, and dust intrusion caused by seal wear and fastener fatigue. Suitable for BOMCO JC series drawworks overall maintenance.
No. | Product Name | Model/ Part No. | Material | Main Wear Causes | Damage Prevention Precautions |
1 | Vent Plug | AF40108-020113 (R1/2) | Body: 45# carbon steel (galvanized); Filter Screen: 304 stainless steel | 1. Filter screen blockage caused by dust and oil mist; 2. Thread wear caused by repeated disassembly and assembly | 1. Clean the filter screen every 1 month, and blow with compressed air; 2. Apply thread sealant during installation, and avoid over-tightening |
2 | Oil Seal | PD50X70X12 (HG4-692, Part No.: 530301140500701224), PD40X65X12 (HG4-692, Part No.: 530301140100651224) | Sealing Lip: nitrile rubber; Skeleton: 08F carbon steel; Spring: 65Mn steel; Comply with HG4-692 standard | 1. Sealing lip wear caused by long-term friction with the rotating shaft; 2. Skeleton corrosion caused by humid environment and oil contamination | 1. Check the shaft surface smoothness before installation (Ra ≤ 0.8μm), avoid sharp edges; 2. Apply a thin layer of lubricating grease on the sealing lip, and replace every 12 months |
3 | Circlip for Shaft | 40 (Part No.: 420602041040160000) | 65Mn steel (heat treatment); Surface: phosphating | 1. Elastic fatigue and deformation caused by long-term bearing load; 2. Corrosion caused by humid environment and oil contamination | 1. Check the elasticity regularly, and replace if deformation or loss of elasticity is found; 2. Store in a dry environment, and apply anti-rust oil after disassembly |
4 | Staining Groove Screw | MAX10 (Part No.: 420101023504001000) | 45# carbon steel (heat treatment); Thread: precision rolling; Surface: galvanizing | 1. Screw head wear caused by repeated tightening with tools; 2. Thread loosening caused by drawworks vibration | 1. Use a matching tool for tightening, avoid slipping and damaging the screw head; 2. Apply Loctite 243 lock glue during installation, and check the tightness every 7 days |
4. Control Buttons & Miscellaneous Consumables
This category includes emergency buttons, parking buttons, and various auxiliary consumables, ensuring the safe control and daily maintenance of drawworks. They solve pain points of control failure and poor maintenance effect caused by button damage and improper consumable selection. Suitable for BOMCO JC series drawworks daily maintenance and safety system upgrading.
No. | Product Name | Model/ Part No. | Material | Main Wear Causes | Damage Prevention Precautions |
1 | Emergency Button | LA89J-22ZS/2-22R (Part No.: 330109030122104000) | Shell: engineering plastic (flame-retardant); Contact: silver alloy; Spring: 65Mn steel | 1. Contact wear and poor contact caused by frequent pressing; 2. Shell damage caused by collision and dust intrusion | 1. Check the button flexibility and contact status regularly, and replace if stuck or poor contact occurs; 2. Install a protective cover to avoid accidental collision, and clean the shell surface regularly |
2 | Parking Button | L89G-22XB/2-22K (Part No.: 330109030522103000) | Shell: engineering plastic; Contact: silver alloy; Spring: 65Mn steel | 1. Spring fatigue and failure to reset caused by long-term compression; 2. Contact oxidation caused by humid environment | 1. Check the reset performance regularly, and replace the spring if necessary; 2. Keep the button dry, and apply anti-oxidation agent on the contact surface every 6 months |
3 | Loctite 243 | 170506010100243000 | Modified acrylic resin; Anaerobic curing type | 1. Curing failure caused by expired use; 2. Loss of bonding performance caused by improper storage (high temperature, sunlight) | 1. Check the expiration date before use, and discard expired products; 2. Store in a cool and dry environment (temperature 5-25℃), avoid direct sunlight |
4 | Sealant 609 | 170522010306090000 | Silicone rubber; High-temperature resistant type | 1. Cracking and loss of sealing performance caused by high temperature exceeding the rated range; 2. Curing incomplete caused by insufficient coating thickness | 1. Ensure the use temperature ≤ 260℃, and apply on clean and dry surfaces; 2. Control the coating thickness (0.5-1mm), and wait for complete curing before assembly |
5 | Raw Material Tape | 530201470025000000 | Polytetrafluoroethylene (PTFE); High-temperature and corrosion resistant | 1. Tear and failure caused by excessive stretching during winding; 2. Loss of sealing performance caused by winding unevenly | 1. Wind along the thread direction with moderate force, avoid excessive stretching; 2. Ensure 3-5 layers of winding, and press tightly to make it fit with the thread |
6 | Extreme Pressure Lithium Base Grease | NLG12 (070901170001010000), NLG10 (070901170000010000) | Base Oil: mineral oil; Thickener: lithium soap; Additive: extreme pressure anti-wear additive | 1. Oxidation and degradation caused by high temperature and long-term storage; 2. Loss of lubrication performance caused by mixing with other greases | 1. Store in a sealed container, avoid high temperature (≤ 40℃) and moisture; 2. Do not mix with other types of greases, and clean the lubrication point before adding |
7 | Explosion Proof Jack Switch | WB-E-22-19F-P/S(14 CORE) (Part No.: 340802390020060000) | Shell: cast aluminum alloy (explosion-proof treatment); Contact: silver alloy; Wiring Terminal: copper alloy | 1. Contact wear and poor contact caused by frequent switching; 2. Shell corrosion caused by humid and corrosive oilfield environment | 1. Check the switch contact status and explosion-proof seal regularly, and replace if damaged; 2. Paint the shell with anti-corrosion paint every 6 months, and avoid contact with corrosive substances |
Field Fault Maintenance Case
Case: BOMCO JC-90 Drawworks Hydraulic Disc Brake Leakage Failure
Fault Phenomenon: During drilling operation, the hydraulic disc brake system of the JC-90 drawworks had obvious oil leakage at the high-pressure hose interface and quick acting coupling, and the braking force decreased significantly (the braking torque was tested to be 25% lower than the rated value), accompanied by abnormal heating of the hydraulic oil tank (oil temperature reached 95℃).
Inspection Process: 1. Stop the drawworks operation immediately, cut off the hydraulic system power supply, and perform pressure relief treatment on the hydraulic circuit (open the pressure relief valve until the pressure gauge shows 0MPa) to ensure maintenance safety; 2. Visually inspect the hydraulic disc brake system, focusing on the high-pressure hose interface, quick acting coupling, and O-ring installation positions; 3. Disassemble the leaking interface, and find that the O-ring (16X2.4) is aging, cracking, and losing elasticity, and the seal ring of the quick acting coupling is worn and has obvious indentations; 4. Detect the hydraulic system oil temperature and oil quality, and confirm that the oil temperature exceeds the normal range (≤ 80℃), and the hydraulic oil has slight oxidation and contains a small amount of impurities.
Root Cause Analysis: 1. The hydraulic system operated continuously under high load for a long time, and the cooling system failed to work normally, resulting in the oil temperature being too high for a long time, which accelerated the aging and cracking of the nitrile rubber O-ring; 2. The quick acting coupling was frequently plugged and unplugged during daily maintenance, resulting in wear of the seal ring; 3. The hydraulic oil filter element was not replaced on time, leading to impurities in the oil, which aggravated the wear of the seal components.
Complete Solution: 1. Safety Preparation: Set up warning signs around the maintenance area to prevent unrelated personnel from entering; wear professional protective equipment (protective gloves, goggles, anti-skid shoes) to avoid hydraulic oil splashing and mechanical injury. 2. Pressure Relief & Disassembly: Open the pressure relief valve of the hydraulic system to release the residual pressure completely; use a torque wrench to disassemble the high-pressure hose interface and quick acting coupling in sequence, and place the disassembled parts in a clean container to avoid contamination. 3. Component Replacement: a) Replace all aging O-rings (16X2.4) with new ones that comply with HG/T 2579-2008 standard, and apply a thin layer of clean hydraulic oil on the surface of the new O-rings before installation to reduce friction during assembly; b) Replace the worn seal rings of the quick acting coupling with fluororubber seal rings that are resistant to high temperature and pressure; c) Replace the hydraulic oil filter element (model: matching JC-90 drawworks hydraulic system) to ensure the oil filtration effect. 4. Cooling System Maintenance: Overhaul the hydraulic system cooling device, clean the cooling water channel and radiator fins to remove scale and dust; check the cooling fan operation status, and replace the fan bearing if there is abnormal noise; test the cooling system to ensure that the oil temperature can be controlled within ≤ 80℃ during normal operation. 5. System Cleaning & Assembly: Clean the disassembled interfaces and parts with clean diesel oil, and dry them with compressed air; assemble the high-pressure hose interface and quick acting coupling in sequence, and use a torque wrench to tighten them according to the specified torque (25-30N·m for high-pressure hose interface, 15-20N·m for quick acting coupling) to avoid over-tightening or under-tightening. 6. Oil Replacement & Debugging: Drain the old hydraulic oil in the oil tank, clean the oil tank with clean diesel oil, and inject new hydraulic oil that meets the specification (model: recommended by BOMCO for JC-90 drawworks) to the specified oil level; start the hydraulic system, conduct no-load operation for 10-15 minutes, check for oil leakage at each interface; test the braking performance, adjust the brake clearance to the standard range (0.5-1mm), and verify that the braking torque reaches the rated value (≥ the design value of JC-90 drawworks hydraulic disc brake system). 7. Post-Maintenance Inspection: Operate the drawworks for a trial run under no-load and light-load conditions respectively, monitor the oil temperature (should be ≤ 80℃) and braking performance in real time; check all interfaces again for oil leakage, and confirm that the system operates stably without abnormal noise.
Preventive Measures: 1. Formulate a regular maintenance plan: Replace the O-ring and quick acting coupling seal ring every 12 months; replace the hydraulic oil filter element every 6 months; replace the hydraulic oil every 24 months. 2. Daily monitoring: Install a temperature alarm device in the hydraulic system, and stop the machine for inspection immediately when the oil temperature exceeds 85℃; check the hydraulic system for oil leakage every shift, and deal with hidden dangers in time. 3. Maintenance training: Strengthen the training of maintenance personnel on the standard operation of quick acting coupling plugging and unplugging, and avoid violent operation; standardize the use of torque wrenches to ensure the assembly quality of interfaces. 4. Storage management: Store spare O-rings and seal rings in a sealed, dry and cool environment, avoid contact with oil, chemicals and direct sunlight, and check the expiration date regularly.
Maintenance Effect: After maintenance, the hydraulic disc brake system no longer leaked oil, the oil temperature was stably controlled within 75-80℃ during operation, and the braking torque returned to the rated standard. The drawworks operated stably for 3 months without similar faults, ensuring the safe and efficient progress of drilling operations.
Procurement Guide & Call to Action
All supplementary BOMCO drawworks spare parts listed in this document are fully compatible with JC-90, JC-70, JC-50, JC-40 and their DB/D variant models, complying with API Spec 7K and relevant national standards. When purchasing, please confirm the specific part's model, part number, and drawing number (e.g., hydraulic disc brake system refers to Drawing No.: PS903402-00B1) to ensure accurate matching. Our professional technical team provides one-on-one technical consultation services, covering product selection, on-site installation guidance, fault diagnosis, and maintenance training. For detailed product parameters, material performance reports, certification documents, and procurement quotes, please contact us at your convenience. We are committed to providing you with high-quality, genuine BOMCO drawworks spare parts and professional after-sales support, ensuring the efficient, stable and safe operation of your drawworks.
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