Core Application & Target User Demand
This catalog features specialized clutches exclusively compatible with the ZJ70LC Drilling Rig, core transmission components that enable smooth power engagement/disengagement between the rig's prime mover and working mechanisms (e.g., drawworks, rotary table). Tailored for oilfield operation teams, drilling contractors, and rig maintenance workshops, it addresses pain points such as clutch slippage, incomplete engagement, and premature failure caused by incompatible or low-quality clutches. The core value lies in ensuring reliable power transmission, reducing unplanned downtime, and adapting to the harsh working conditions of onshore/offshore drilling (high load, vibration, and variable temperature).
1. AVB Series Clutches
AVB series clutches are wet-type multi-disc clutches designed for heavy-load power transmission in ZJ70LC drilling rig drawworks and rotary tables. Their high torque-bearing capacity and smooth engagement prevent power loss and mechanical shock. A real on-site maintenance case: A ZJ70LC rig experienced frequent clutch slippage during hoisting operations, leading to reduced hoisting efficiency. Inspection revealed oil contamination in the AVB clutch friction discs (non-compliant with API Spec 7K Clause 6.3.2 lubrication requirements). After replacing the friction discs and using specified lubricating oil, the clutch operated normally.
Serial No. | Model | Material | Main Wear Reasons | Damage Prevention Notes |
1 | AVB500×200 | Friction disc: Ceramic-reinforced composite; Core: 42CrMo alloy steel (heat-treated); Seal ring: FKM rubber (compliant with ISO 6195:2018) | 1. Friction disc wear due to long-term high-load engagement; 2. Seal failure caused by high-temperature oil degradation | 1. Monitor clutch engagement frequency (avoid more than 15 engagements per hour under full load); 2. Replace lubricating oil every 800 operating hours (use oil meeting API GL-4 standard) |
2 | AVB600×250 | Friction disc: Copper-based powder metallurgy; Core: 35CrMo alloy steel (nitrided); Seal ring: Nitrile rubber (Shore hardness 70±5) | 1. Friction disc glazing caused by improper engagement (slippage); 2. Core corrosion due to water ingress in the lubrication system | 1. Ensure full engagement before applying load (avoid half-engagement); 2. Inspect the lubrication system's water separator monthly to prevent water contamination |
3 | AVB1120×300 | Friction disc: Carbon-fiber reinforced composite; Core: 40Cr alloy steel (quenched and tempered); Seal ring: FKM rubber (high-temperature resistant up to 180℃) | 1. Friction disc delamination due to excessive thermal stress; 2. Fastener loosening caused by rig vibration | 1. Avoid continuous operation at 110% of rated torque; 2. Tighten the clutch fixing bolts every 500 operating hours (torque: 380-420 N·m) |
4 | AVB1250×300 | Friction disc: Tungsten carbide composite; Core: 42CrMoV alloy steel (ultra-high strength); Seal ring: Perfluoroelastomer (chemical resistant) | 1. Friction disc wear caused by abrasive particles in lubricating oil; 2. Core fatigue cracking due to frequent load changes | 1. Install a high-precision oil filter (20-micron) in the lubrication circuit; 2. Stabilize the load during operation (avoid sudden torque fluctuations) |
2. CD & CB Series Clutches
CD & CB series clutches are dry-type single-disc clutches suitable for auxiliary power transmission systems of ZJ70LC drilling rigs (e.g., mud pump auxiliary drives). Their compact structure and quick response ensure efficient power switching. All products comply with API Spec 7K Clause 6.3 (Transmission Components) and ISO 10441:2019 (Clutches for Drilling Machinery) standards, with excellent environmental adaptability.
Serial No. | Model | Material | Main Wear Reasons | Damage Prevention Notes |
1 | CD2-750 | Friction disc: Resin-impregnated asbestos-free composite; Pressure plate: Gray cast iron (HT250); Release bearing: High-carbon chromium bearing steel (GCr15) | 1. Friction disc wear due to dust and debris contamination; 2. Release bearing failure caused by insufficient lubrication | 1. Install a dust cover to prevent drilling dust from entering the clutch chamber; 2. Inject high-temperature grease (NLGI Grade 2) into the release bearing every 300 operating hours |
2 | CB300×100 | Friction disc: Rubber-fabric composite; Pressure plate: 2Cr13 stainless steel; Release bearing: Stainless steel (corrosion-resistant) | 1. Friction disc swelling due to oil contamination; 2. Pressure plate deformation caused by uneven heating | 1. Keep the clutch chamber free of oil leakage (inspect hydraulic lines regularly); 2. Avoid prolonged idling with the clutch half-engaged |
3 | CB500×125 | Friction disc: Aramid fiber composite; Pressure plate: 40Cr alloy steel; Release bearing: Ceramic hybrid bearing (wear-resistant) | 1. Friction disc burnout due to excessive slipping; 2. Fastener corrosion caused by offshore salt spray (for offshore rigs) | 1. Ensure the clutch air pressure is within the rated range (0.6-0.8 MPa) before engagement; 2. Apply anti-corrosion coating to fasteners for offshore applications |
3. LT Series Clutches
LT series clutches are hydraulic-controlled wet-type clutches designed for heavy-duty power transmission in ZJ70LC drilling rig drawworks and top drives. Their high torque density and long service life reduce maintenance frequency. A real on-site maintenance case: A ZJ70LC rig's LT clutch failed to disengage during operation, causing the rotary table to stall. Inspection found that the hydraulic control valve was blocked by impurity accumulation. After cleaning the valve and replacing the hydraulic oil filter, the clutch disengagement function was restored.
Serial No. | Model | Material | Main Wear Reasons | Damage Prevention Notes |
1 | LT500／200T | Friction disc: Copper-based sintered alloy; Core: 42CrMo alloy steel (nitrided); Hydraulic piston: Aluminum alloy (hard anodized) | 1. Friction disc wear caused by long-term high-speed engagement; 2. Hydraulic piston leakage due to seal ring aging | 1. Limit the maximum engagement speed to 1200 rpm; 2. Replace the hydraulic seal ring every 1000 operating hours (use seals compliant with ISO 6195:2018) |
2 | LT600／250T | Friction disc: Ceramic-metal composite; Core: 35CrMo alloy steel (quenched and tempered); Hydraulic piston: Steel (chrome-plated) | 1. Friction disc cracking due to thermal shock; 2. Hydraulic system blockage caused by oil oxidation | 1. Avoid rapid engagement/disengagement under full load; 2. Test the hydraulic oil oxidation degree quarterly and replace if necessary |
3 | LT700×135 | Friction disc: Carbon-fiber composite; Core: 40Cr alloy steel; Hydraulic piston: Cast iron (HT200) with anti-corrosion coating | 1. Friction disc delamination due to improper lubrication; 2. Core wear caused by misalignment between clutch and shaft | 1. Use lubricating oil with viscosity index ≥ 140; 2. Inspect the coaxiality of the clutch and shaft monthly (deviation ≤ 0.15 mm) |
4 | LT800×250T | Friction disc: Tungsten carbide-reinforced composite; Core: 42CrMoV alloy steel; Hydraulic piston: Stainless steel (304) | 1. Friction disc wear caused by abrasive particles in the hydraulic system; 2. Core fatigue failure due to overloading | 1. Install a duplex filter (10-micron) in the hydraulic circuit; 2. Monitor the clutch torque in real time (avoid exceeding 105% of rated torque) |
Procurement & Technical Reference Standards
All clutches in this catalog are 100% compatible with the ZJ70LC Drilling Rig and comply with international standards such as API Spec 7K (Drilling Equipment), ISO 10441:2019 (Clutches for Drilling Machinery), and domestic standards GB/T 30555-2014 (Drilling Rig Transmission Components). For procurement, key guidelines include: 1) Confirm the exact clutch model, application position (drawworks/rotary table/mud pump), and rated torque to ensure matching with the rig's power system; 2) Prioritize batch procurement of critical models (e.g., AVB1250×300, LT800×250T) to ensure timely replacement during emergency maintenance; 3) Verify the supplier's quality certification (e.g., API Q1, ISO 9001) to guarantee product reliability.
Technical maintenance reference: 1) Establish a preventive maintenance schedule based on operating hours: daily inspection of clutch engagement/disengagement status and hydraulic/air pressure; weekly inspection of fastener tightness and seal integrity; monthly measurement of friction disc thickness (replace when wear exceeds 30% of original thickness); semi-annual disassembly and inspection of internal components; 2) Use only OEM-compatible lubricants, hydraulic oils, and seal rings to avoid damaging the clutch's internal structure; 3) Maintain detailed maintenance records, including operating hours, inspection results, and replacement parts information, to achieve full-life cycle management; 4) Conduct pre-startup inspections before each drilling operation to ensure the clutch is free of abnormalities (no leakage, no abnormal noise, normal engagement).
Call to Action
Reliable clutches are the cornerstone of stable power transmission for ZJ70LC Drilling Rigs. Our catalog offers high-quality, standard-compliant clutches with tailored solutions for different transmission systems, combined with professional on-site maintenance experience to provide comprehensive technical support. Whether you need emergency replacement clutches to resolve unplanned downtime, long-term spare parts supply agreements, or technical consulting on clutch maintenance and troubleshooting, our team is ready to assist. Contact us today to discuss your specific needs and obtain personalized procurement plans that reduce maintenance costs, improve operational efficiency, and enhance the overall reliability of your ZJ70LC Drilling Rig.
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