Core Purpose & Equipment Compatibility
This catalog features specialized replacement parts exclusively designed for JC Series Drilling Drawworks, including JC14, JC14/11, JC18A, JC21A, JC21D, JC21/11, JC28/11, JC28A, JC28K, JC28N, and JC28/11F models. Tailored for drilling contractors, oilfield maintenance engineers, equipment procurement managers, and drilling operation teams, these parts address critical pain points such as braking system loosening, rope wear, structural deformation, and fluid system leakage caused by high-load cyclic operations, harsh downhole environments, and frequent braking. Their core purpose is to ensure the safe, stable, and efficient operation of JC series drawworks, extend equipment service life, and comply with API Spec 7K (Drilling and Well Servicing Equipment) and industry safety operation standards.
1. Brake Block Bolts & Nuts
Brake block bolts and nuts are essential fasteners that secure brake linings to brake bands in JC series drawworks braking systems. Operating in high-temperature, high-vibration, and corrosive drilling environments, these components are prone to thread wear, loosening due to thermal expansion, and corrosion from drilling fluid. Failure of these fasteners can lead to brake lining detachment, resulting in catastrophic braking failure. Manufactured with high-strength alloy steel and anti-corrosion treatments, they ensure reliable fastening performance and long-term stability under extreme operating conditions.
No. | Product Name | Specification | Applicable Model | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Brake Block Bolt/Nut | JC14-03-04/JC14-03-05 | JC14 drawworks | Alloy steel (8.8 grade), quenched and tempered, surface galvanizing with passivation treatment, high tensile strength | 1. Thread wear caused by repeated assembly/disassembly during brake lining replacement; 2. Loosening due to high-frequency braking vibration and thermal expansion. | 1. Use a torque wrench to tighten nuts to the specified torque (refer to OEM manual); 2. Apply high-temperature anti-seize agent to threads before installation to prevent seizing and corrosion. |
2 | Brake Block Bolt/Nut | JC28A-02-05/JC28A-02-06 | JC28A drawworks | Alloy steel (10.9 grade), high-strength, surface phosphating, excellent anti-corrosion and anti-loosening performance | 1. Fatigue failure of bolts caused by cyclic vibration during heavy-load braking; 2. Corrosion of threads from drilling fluid and humid offshore environments. | 1. Regularly inspect bolts for fatigue cracks using magnetic particle testing; replace every 12 months or if cracks are found; 2. Clean threads after operation and reapply anti-corrosion grease. |
3 | Brake Block Bolt/Nut | JC21A-03-13/JC21A-03-14 | JC21A drawworks | Alloy steel (8.8 grade), heat-treated, surface zinc-nickel plating, superior corrosion resistance | 1. Thread galling caused by improper installation torque; 2. Loosening due to uneven braking force distribution. | 1. Avoid over-tightening; strictly follow torque specifications; 2. Check and re-tighten after the first 50 hours of operation and periodically thereafter. |
2. Brake Band Assemblies
Brake band assemblies are critical safety components for sand drum deceleration and stopping in JC series drawworks. Operating under high-temperature friction, high-pressure clamping, and continuous heavy-load conditions, these assemblies are prone to brake lining wear, band deformation, and fastener loosening. Degradation of these components reduces braking efficiency, posing severe safety risks to hoisting operations. Manufactured with high-temperature resistant friction materials and high-strength steel bands, they ensure stable friction coefficients, excellent heat dissipation, and reliable braking performance.
No. | Product Name | Specification | Applicable Model & System | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Brake Band Assembly | JC28/11-07-01-00 | JC28/11 drawworks sand drum brake system | Brake band: Alloy steel (40Cr), heat-treated for high rigidity; Brake lining: Ceramic friction material (high-temperature resistant up to 400°C, low wear rate) | 1. Thermal fading and wear of brake lining caused by continuous sand drum braking; 2. Fatigue deformation of brake band due to cyclic clamping force. | 1. Avoid prolonged continuous braking; arrange cooling intervals to prevent thermal fading; 2. Regularly inspect brake band straightness; straighten or replace if deformation exceeds 2mm/m. |
2 | Brake Band Assembly | JC28/11F-03-07-00 | JC28/11F drawworks sand drum brake system | Brake band: Carbon steel (Q355B), welded with internal stress relief; Brake lining: Semi-metallic friction material (excellent heat dissipation) | 1. Abrasive wear of brake lining from sand and gravel contamination; 2. Weld seam fatigue cracking caused by vibration during braking. | 1. Clean brake band and lining regularly to remove sand and debris; 2. Inspect weld seams annually using non-destructive testing; repair if cracks are found. |
3. LEBUS Rope Grooves
LEBUS rope grooves are precision components installed on JC series drawworks drums to ensure even rope winding, reduce rope wear, and prevent rope slipping. Operating under high-tension rope friction, cyclic load, and abrasive particle contamination, these grooves are prone to surface wear, groove deformation, and corrosion. Poor rope groove condition accelerates rope failure and increases operational risks. Manufactured with high-strength alloy steel and precision machining, they feature a unique spiral design that optimizes rope contact, ensuring long service life in high-intensity drilling operations.
No. | Product Name | Specification | Applicable Model & Assembly | Material | Primary Wear Causes | Damage Prevention Notes |
1 | LEBUS Rope Groove | JC14-01-09-06 | JC14 and JC14/11 drawworks drum assembly | Alloy steel (42CrMo), quenched and tempered, surface hardening (HRC 52-56), precision grinding | 1. Abrasive wear from long-term friction with drilling rope; 2. Groove deformation caused by uneven rope tension. | 1. Ensure rope tension is within the specified range; use a rope tensioner for uniform winding; 2. Regularly measure groove depth; regrind or replace when wear exceeds 10% of the original depth. |
2 | LEBUS Rope Groove | JC21A-01-13A/B-05-00 | JC21A, JC21D and JC21/11 drawworks drum assembly | Alloy steel (40CrNiMoA), integral forging, surface nitriding, high fatigue strength | 1. Wear caused by high-load rope winding; 2. Corrosion from drilling fluid and humid environments. | 1. Apply anti-corrosion grease to the groove surface when the drawworks is not in use; 2. Avoid rope kinking during winding to prevent abnormal groove wear. |
3 | LEBUS Rope Groove | JC28/11-06-11-03 | JC28K and JC28/11 drawworks drum assembly | Alloy steel (42CrMo), surface hard chrome plating, excellent wear and corrosion resistance | 1. Peeling of chrome plating layer caused by rope impact; 2. Groove edge wear from rope sliding during acceleration/deceleration. | 1. Avoid sudden acceleration/deceleration during rope winding; 2. Inspect chrome plating for peeling regularly; re-plate if necessary. |
4 | LEBUS Rope Groove | JC32A-01-11-03-00 | JC28N and JC28/11F drawworks drum assembly | Alloy steel (40CrNiMoA), quenched and tempered, precision CNC machining | 1. Fatigue wear caused by long-term high-frequency rope winding; 2. Groove deformation from heavy-load hoisting operations. | 1. Conduct periodic non-destructive testing to check for fatigue cracks; 2. Operate within the rated hoisting load to avoid excessive groove stress. |
4. Structural Components
Structural components are key load-bearing and connecting parts of JC series drawworks, playing critical roles in maintaining the overall structural integrity and stability of the equipment. Operating under high-load, high-vibration, and corrosive drilling environments, these components are prone to wear, deformation, and weld seam fatigue, which can affect the safe operation of the drawworks. Manufactured with high-quality alloy steel and strict precision machining, they ensure excellent load-bearing capacity and compatibility with JC series models.
No. | Product Name | Specification | Applicable Model | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Structural Component | JC21/11-03-19, R485x203.2x305x25.4mm | JC21/11 drawworks | Alloy steel (Q355B), welded structure, surface sandblasting and anti-corrosion painting, internal stress relief | 1. Wear from contact with moving components; 2. Weld seam fatigue caused by cyclic vibration. | 1. Regularly inspect contact surfaces for wear; repair by welding or grinding if necessary; 2. Check weld seams for cracks periodically; reinforce if needed. |
2 | Structural Component | JC21A-03-16, R535x305x254x25.4mm | JC21A drawworks | Alloy steel (Q355B), precision machining, surface anti-corrosion treatment | 1. Deformation caused by uneven load distribution; 2. Corrosion from drilling fluid and moisture. | 1. Ensure proper installation to distribute load evenly; 2. Clean the component surface regularly and reapply anti-corrosion paint annually. |
3 | Structural Component | JC28/11-03-13A, R584x254x305x32mm | JC28/11 drawworks | Alloy steel (42CrMo), quenched and tempered, high load-bearing capacity | 1. Fatigue deformation caused by long-term heavy-load operation; 2. Abrasive wear from sand and gravel contamination. | 1. Operate within the rated load range to avoid overloading; 2. Clean the component after operation in sandy environments. |
4 | Structural Component | JC28A-02-08, R635x254x305x32mm | JC28A drawworks | Alloy steel (42CrMo), integral forging, precision machining | 1. Stress concentration and cracking caused by improper installation; 2. Thermal fatigue from high-temperature operating environments. | 1. Ensure installation alignment meets OEM specifications; 2. Monitor operating temperature; arrange cooling if overheated. |
5 | Structural Component | JC14-03-06, R485x203.2x305x25.4mm | JC14 drawworks | Alloy steel (Q355B), welded, surface painting, anti-corrosion | 1. Wear from vibration-induced contact with adjacent components; 2. Corrosion from humid offshore drilling environments. | 1. Install anti-vibration pads between contact surfaces; 2. Use marine-grade anti-corrosion paint for offshore applications. |
6 | Structural Component | JC18A-03-02, R535x254x305x25.4mm | JC18A drawworks | Alloy steel (Q355B), precision stamping and machining | 1. Deformation caused by transportation and installation collision; 2. Wear from normal operational friction. | 1. Use protective packaging during transportation; avoid collision during installation; 2. Regularly inspect for deformation and wear; repair or replace if necessary. |
5. Dual Actuated Swivel Joints
Dual actuated swivel joints are critical components in JC series drawworks fluid systems, enabling flexible fluid transmission while accommodating angular movement. Operating under high-pressure fluid conditions, vibration, and corrosive drilling fluid environments, these joints are prone to seal wear, leakage, and bearing damage, which can disrupt fluid system operation. Manufactured with high-quality stainless steel and wear-resistant seals, they ensure reliable high-pressure performance and long-term sealing stability.
No. | Product Name | Specification | Applicable Model | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Dual Actuated Swivel Joint | SD-00E | JC Series drawworks fluid systems | Body: Stainless steel (316L); Seals: Fluororubber (FKM); Bearings: High-carbon chromium bearing steel (GCr15) | 1. Seal wear and leakage caused by high-pressure fluid flow and cyclic angular movement; 2. Bearing wear from misalignment and lack of lubrication. | 1. Ensure fluid pressure is within the rated range; replace seals annually or if leakage is detected; 2. Lubricate bearings with high-pressure grease regularly; check alignment during installation. |
Procurement Guidance
All parts in this catalog are 100% compatible with JC series drilling drawworks, manufactured in strict compliance with OEM specifications and API Spec 7K requirements. For drilling operations seeking to enhance braking system reliability, reduce rope wear, and ensure structural stability of JC series drawworks, these parts offer a professional, durable, and cost-effective solution. We invite you to contact our experienced sales team to discuss your specific procurement needs, obtain detailed technical parameters and model-matching guidance, and secure authentic, high-quality components tailored to your JC series drilling drawworks maintenance and replacement requirements.
Technical Reference Standards & Support
All products adhere to international and industry authoritative standards, including API Spec 7K, ISO 9001 Quality Management System Certification, GB/T 3077 (Alloy Structural Steels), GB/T 700 (Carbon Structural Steels), GB/T 3098.1 (Mechanical Properties of Fasteners), and GB/T 5574 (Rubber Sealing Products). Each part undergoes rigorous quality testing, including dimensional accuracy verification, material composition analysis, tensile strength testing, wear resistance testing, and corrosion resistance testing. Our dedicated technical team provides comprehensive support, including installation guidelines, maintenance best practices, and troubleshooting services, to ensure optimal performance, operational safety, and extended service life of your JC series drilling drawworks.
contact us ：
Emeil: [email protected] whatsapp: +86 15275658619
Should you have any purchase intentions, please contact us – we will offer you our most favorable price.