Core Purpose & Equipment Compatibility
This catalog focuses on professional replacement parts exclusively designed forJC Series Drilling Drawworks, including JC14, JC14/11, JC18A, JC18B, JC18/11B, JC21A, JC21D, JC21/11, JC21/11B, JC28/11, JC28A, JC28K, JC28N, JC28/11F, JC32A, and JC32B models. Tailored to drilling contractors, oilfield maintenance teams, equipment procurement managers, and drilling engineering service providers, these parts address the core demand of mitigating operational risks caused by high-load friction, cyclic stress, and harsh downhole working environments. Their primary purpose is to ensure the stable and safe operation of JC series drawworks, enhance braking reliability, extend equipment service life, and comply with API Spec 7K (Drilling and Well Servicing Equipment) and oilfield safety operation standards.
1. Drawworks Drum Bodies
Drum bodies are core load-bearing components of JC series drilling drawworks, responsible for winding and releasing drilling ropes to realize hoisting and lowering operations. Operating under high-tension rope friction, cyclic load, and impact during drilling, these components are prone to wear of the drum surface, groove deformation, and fatigue cracking, which can lead to rope slipping and equipment operational accidents. Manufactured with high-strength alloy steel and precision machining, they ensure excellent wear resistance, load-bearing capacity, and dimensional accuracy, adapting to long-term high-intensity drilling operations.
No. | Product Name | Specification | Applicable Model | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Drawworks Drum Body / Main Drum Body | JC14-01-09-00 | JC14 drawworks, JC14/11 drawworks | Alloy steel (42CrMo), quenched and tempered treatment, surface hardening (HRC 50-55), precision turning and grinding | 1. Abrasive wear of drum surface and groove caused by long-term friction with drilling rope; 2. Fatigue cracking of drum body caused by cyclic hoisting load impact. | 1. Regularly inspect the drum surface and groove for wear; regrind the groove when wear depth exceeds 10% of the rope diameter; 2. Ensure the drilling rope is properly lubricated to reduce friction; avoid overloading hoisting beyond the rated capacity. |
2 | Drawworks Drum Body / Main Drum Body | JC21A-01-13A/B-00 | JC21A drawworks, JC21D drawworks, JC21/11B drawworks | Alloy steel (42CrMo), quenched and tempered treatment, surface hardening (HRC 50-55), precision turning and grinding | 1. Abrasive wear of drum groove caused by rope friction; 2. Local stress concentration and deformation caused by uneven rope winding. | 1. Ensure the rope is evenly wound on the drum; use a rope guide device to avoid overlapping winding; 2. Regularly check the drum body for cracks using magnetic particle testing; repair or replace if cracks are found. |
3 | Sand Drum Body | JC21/11-02-11-00 | JC21/11 drawworks | Alloy steel (Q355B), welded structure, surface sandblasting and painting, internal stress relief treatment | 1. Wear caused by sand and gravel contamination during drilling operation; 2. Weld seam fatigue cracking caused by cyclic load. | 1. Regularly clean the drum surface to remove sand and gravel; 2. Inspect weld seams for cracks regularly; perform non-destructive testing annually. |
4 | Main Drum Body | JC28/11-06-11-00 | JC28/11 drawworks | Alloy steel (40CrNiMoA), quenched and tempered, surface nitriding treatment, high fatigue strength | 1. Severe abrasive wear caused by high-tension heavy-load rope friction; 2. Thermal fatigue caused by frequent braking and heat generation. | 1. Monitor the temperature of the drum during frequent braking; arrange cooling intervals if overheated; 2. Replace the drilling rope in time when it is severely worn to reduce abnormal wear of the drum. |
5 | Sand Drum Body | JC28/11-04-10-00 | JC28/11 drawworks | Alloy steel (Q355B), welded structure, surface anti-corrosion coating, wear-resistant lining | 1. Wear of the lining caused by sand and gravel impact and friction; 2. Corrosion caused by downhole drilling fluid and moisture. | 1. Regularly inspect the wear condition of the lining; replace the lining when wear exceeds the limit; 2. Clean the drum after operation to avoid drilling fluid residue and corrosion. |
6 | Drawworks Drum Body | JC28K-01-00 | JC28K drawworks | Alloy steel (42CrMo), integral forging, precision machining, surface hard chrome plating | 1. Abrasive wear of the chrome plating layer caused by rope friction; 2. Deformation caused by uneven hoisting load. | 1. Avoid sudden start and stop during hoisting to reduce impact load; 2. Inspect the chrome plating layer for peeling regularly; re-plate if necessary. |
7 | Drawworks Drum Body | JC32A-01-11-00 | JC28N drawworks | Alloy steel (40CrNiMoA), quenched and tempered, surface hardening, high wear resistance | 1. Fatigue wear caused by long-term high-frequency hoisting operations; 2. Groove deformation caused by improper rope tension adjustment. | 1. Adjust the rope tension to the specified value regularly; 2. Arrange regular maintenance intervals to inspect the drum's dimensional accuracy; repair if deformed. |
8 | Drawworks Drum Body | JC18A-01-16-00 | JC18A drawworks, JC18B drawworks, JC18/11B drawworks | Alloy steel (42CrMo), quenched and tempered, surface grinding, precision groove processing | 1. Abrasive wear of groove edges caused by rope sliding; 2. Corrosion caused by marine or humid offshore drilling environments. | 1. Apply anti-corrosion grease to the drum surface regularly in humid environments; 2. Check the groove edges for burrs and打磨 smoothly if found. |
9 | Main Drum Body | JC28/11F-06-10-00 | JC28/11F drawworks | Alloy steel (40CrNiMoA), integral forging, surface nitriding, high-temperature resistance | 1. Thermal wear caused by high-temperature drilling environments; 2. Fatigue cracking caused by long-term cyclic load. | 1. Monitor the operating temperature of the drum in high-temperature environments; 2. Perform periodic fatigue testing on the drum body to ensure operational safety. |
10 | Sand Drum Body | JC28/11F-04-04-00 | JC28/11F drawworks | Alloy steel (Q355B), welded structure, wear-resistant coating, internal stress relief | 1. Wear of the wear-resistant coating caused by sand and gravel friction; 2. Weld seam corrosion caused by drilling fluid immersion. | 1. Touch up the wear-resistant coating when local wear is found; 2. Clean the weld seams regularly and apply anti-corrosion paint. |
11 | Sand Drum Body | JC14/11-03-02-00 | JC14/11 drawworks | Alloy steel (Q355B), welded, surface painting, anti-corrosion and wear-resistant | 1. Wear caused by sand and gravel during sand control operations; 2. Deformation caused by improper storage and transportation collision. | 1. Avoid collision during storage and transportation; use protective pads; 2. Inspect the drum body for deformation before installation. |
12 | Drawworks Drum Body | JC21A-01-10-00, Φ1070x310mm | JC21A drawworks | Alloy steel (42CrMo), quenched and tempered, surface hardening, precision dimension control | 1. Abrasive wear of the drum surface caused by rope friction; 2. Dimensional deviation caused by long-term high-load operation. | 1. Regularly measure the drum's outer diameter and length to check for dimensional deviation; 2. Ensure the rope is matched with the drum groove size. |
13 | Drawworks Drum Body | JC21D-01-05-00, Φ1070x310mm | JC21D drawworks | Alloy steel (42CrMo), quenched and tempered, surface hardening, precision dimension control | 1. Groove wear caused by rope friction; 2. Fatigue damage caused by frequent load changes. | 1. Avoid frequent load changes during operation; maintain stable hoisting speed; 2. Replace the drum when groove wear affects rope winding. |
14 | Drum Body | JC28/11-04-08-00, Φ970x210mm | JC28/11 drawworks | Alloy steel (Q355B), welded, surface anti-corrosion treatment | 1. Wear caused by sand and gravel; 2. Corrosion caused by humid environment. | 1. Clean the drum surface after each use; 2. Store in a dry and ventilated environment when not in use. |
15 | Drum Body | JC18/11B-02-03-00, Φ970x210mm | JC18/11B drawworks | Alloy steel (Q355B), welded, surface anti-corrosion treatment | 1. Wear caused by rope friction and sand contamination; 2. Weld seam fatigue caused by cyclic load. | 1. Regularly inspect weld seams for integrity; 2. Ensure proper lubrication of the rope to reduce friction. |
16 | Drawworks Drum Body | JC18B-01-06-00, Φ1070x260mm | JC18B drawworks | Alloy steel (42CrMo), quenched and tempered, surface grinding | 1. Abrasive wear of the drum surface; 2. Deformation caused by uneven load. | 1. Operate the drawworks within the rated load range; 2. Regularly check the drum's straightness and correct if necessary. |
17 | Drum Body | JC28/11-06-12-00, Φ1168x267mm | JC28/11 drawworks | Alloy steel (40CrNiMoA), integral forging, surface nitriding | 1. High-tension rope friction wear; 2. Thermal fatigue from frequent braking. | 1. Optimize braking frequency to reduce thermal impact; 2. Inspect the drum surface for thermal cracks regularly. |
18 | Drum Body | JC32B-01-07-00, Φ1270x267mm | JC32B drawworks | Alloy steel (40CrNiMoA), integral forging, surface nitriding | 1. Heavy-load wear of the drum groove; 2. Fatigue cracking caused by long-term operation. | 1. Conduct regular non-destructive testing for fatigue cracks; 2. Maintain the drum groove regularly to ensure smooth rope winding. |
2. Brake Band Assemblies
Brake band assemblies are critical safety components of JC series drilling drawworks, responsible for decelerating and stopping the drum during hoisting operations. Operating under high-temperature friction, high-pressure clamping, and frequent braking cycles, these components are prone to wear of the brake lining, deformation of the brake band, and loosening of fasteners, which can lead to reduced braking efficiency and potential safety hazards. Manufactured with high-temperature resistant friction materials and high-strength steel bands, they ensure reliable braking performance, stable friction coefficient, and strong heat dissipation capacity.
No. | Product Name | Specification | Applicable Model & System | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Brake Band Assembly | JC18A-03-01-00 | JC18A drawworks, JC18B drawworks | Brake band: Carbon steel (Q235) with heat treatment; Brake lining: Semi-metallic friction material (high-temperature resistant up to 350°C) | 1. Abrasive wear of the brake lining caused by high-temperature friction during braking; 2. Deformation of the brake band caused by uneven clamping force. | 1. Regularly inspect the thickness of the brake lining; replace when thickness is less than 5mm; 2. Adjust the brake cylinder pressure to ensure even clamping force on both sides of the brake band. |
2 | Brake Band Assembly | JC28/11-03-05-00 | JC28/11 drawworks main drum brake system | Brake band: Alloy steel (40Cr); Brake lining: Ceramic friction material (high-temperature resistant up to 400°C, low wear rate) | 1. Thermal fading of the brake lining caused by continuous heavy-load braking; 2. Fatigue deformation of the brake band caused by frequent braking cycles. | 1. Avoid continuous heavy-load braking; arrange cooling intervals to prevent thermal fading; 2. Check the brake band for deformation regularly; straighten or replace if necessary. |
3 | Brake Band Assembly | JC21A-03-01-00 | JC21A drawworks, JC21/11 drawworks main drum | Brake band: Carbon steel (Q235) with galvanizing; Brake lining: Resin-based friction material (stable friction coefficient) | 1. Wear of the brake lining caused by normal braking friction; 2. Corrosion of the brake band caused by humid and corrosive drilling environments. | 1. Clean the brake band and lining regularly to remove dust and debris; 2. Apply anti-corrosion grease to the brake band hinge and fasteners. |
4 | Brake Band Assembly | JC32B-02-02-00 | JC28N drawworks | Brake band: Alloy steel (42CrMo); Brake lining: Ceramic friction material (high wear resistance and heat dissipation) | 1. Severe wear of the brake lining caused by heavy-load braking; 2. Loosening of the lining rivets caused by vibration. | 1. Check the lining rivets for tightness regularly; re-rivet or replace if loose; 2. Monitor the braking temperature during heavy-load operation. |
5 | Brake Band Assembly | JC21/11-03-23-00 | JC21/11 drawworks sand drum | Brake band: Carbon steel (Q235); Brake lining: Wear-resistant resin-based friction material | 1. Wear of the brake lining caused by sand drum braking; 2. Abrasion of the brake band caused by sand and gravel contamination. | 1. Clean the sand drum and brake band regularly to remove sand and gravel; 2. Replace the brake lining when wear is excessive. |
6 | Brake Band Assembly | JC28A-02-01-00 | JC28K drawworks | Brake band: Alloy steel (40Cr); Brake lining: Semi-metallic friction material (high-temperature resistant) | 1. Thermal fatigue of the brake band caused by frequent high-temperature braking; 2. Wear of the brake lining caused by normal operation. | 1. Ensure the brake system has good heat dissipation; 2. Regularly inspect the brake band for cracks and fatigue damage. |
7 | Brake Band | JC14-03-07 00 | JC14 drawworks, JC14/11 drawworks main drum brake system and sand drum brake system | Brake band: Carbon steel (Q235) with anti-corrosion coating; Brake lining: Resin-based friction material | 1. Wear of the brake lining caused by dual-system braking; 2. Deformation of the brake band caused by improper adjustment. | 1. Adjust the brake clearance according to the manufacturer's specifications; 2. Check the brake band for deformation and correct if necessary. |
3. Brake Block Bolts & Nuts
Brake block bolts and nuts are key fasteners for fixing the brake lining to the brake band of JC series drilling drawworks. Operating under high-temperature, high-vibration, and repeated clamping load environments, these components are prone to thread wear, loosening, and corrosion, which can lead to brake lining detachment and braking failure. Manufactured with high-strength alloy steel and anti-loosening and anti-corrosion treatments, they ensure reliable fastening performance and long-term stability in harsh braking environments.
No. | Product Name | Specification | Applicable Model | Material | Primary Wear Causes | Damage Prevention Notes |
1 | Brake Block Bolt/Nut | JC21A-03-13/JC21A-03-14 | JC21A drawworks | Bolt/Nut: Alloy steel (8.8 grade), quenched and tempered, surface galvanizing | 1. Thread wear caused by repeated assembly and disassembly during maintenance; 2. Loosening caused by braking vibration and high-temperature expansion. | 1. Use a torque wrench to tighten the nuts to the specified torque; 2. Apply high-temperature anti-seize agent to the threads before assembly. |
2 | Brake Block Bolt/Nut | JC28A-02-05/JC28A-02-06 | JC28A drawworks | Bolt/Nut: Alloy steel (10.9 grade), high-strength, surface phosphating | 1. Fatigue failure of the bolt caused by cyclic vibration; 2. Corrosion of the thread caused by drilling fluid and moisture. | 1. Regularly inspect the bolts for fatigue cracks; replace if found; 2. Clean the threads after operation and apply anti-corrosion grease. |
Procurement Guidance
All parts in this catalog are 100% compatible with JC series drilling drawworks, manufactured in strict compliance with OEM standards and API Spec 7K (Drilling and Well Servicing Equipment) requirements. For drilling operations aiming to ensure the safe and reliable operation of JC series drawworks, improve braking stability, and reduce downtime, these parts provide a professional and cost-effective solution. We invite you to contact our professional sales team to discuss your specific procurement needs, obtain detailed technical parameters, and secure authentic, high-quality components tailored to your JC series drilling drawworks maintenance and replacement requirements.
Technical Reference Standards & Support
All products comply with 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 Made of Carbon Steel and Alloy Steel), and GB 5763 (Friction Materials for Automobile Brakes). Each part undergoes strict quality testing, including dimensional accuracy verification, material composition analysis, tensile strength testing, wear resistance testing, and high-temperature performance testing. For detailed installation guidelines, maintenance schedules, and troubleshooting support, our dedicated technical team is available to provide professional services, ensuring optimal performance and operational safety of your JC series drilling drawworks.
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