Lanzhou Drawworks JC70 Clutch Assembly (115.101.00)

1

115.101.00

Cluth Assy

1. Friction plate wear from prolonged heavy-load engagement; 2. Internal component misalignment from rig vibration; 3. Oil contamination leading to slippage and reduced friction.

1. Avoid abrupt engagement/disengagement to reduce friction plate wear; 2. Inspect for oil leaks monthly to prevent contamination; 3. Check alignment quarterly and adjust with shims if needed.

Integrated assembly with high-strength steel structural parts, friction plates, and control components; fully compatible with Lanzhou Drawworks JC70; meets API 7K torque and wear resistance standards.

2

115.101.01

Flanged housing Assy

1. Fatigue cracking from long-term vibration and torque stress; 2. Corrosion from drilling mud, salt spray, and environmental moisture; 3. Wear at bolt connection points from repeated assembly/disassembly.

1. Inspect for cracks and deformation monthly; 2. Apply anti-corrosion paint annually to vulnerable areas; 3. Tighten connection fasteners evenly to reduce stress concentration.

Q355B low-alloy steel; one-piece forging and welding structure; precision-machined flange surface; designed to protect internal clutch components and provide stable mounting support.

3

115.101.01.00

Tube Assy

1. Abrasive wear from contact with internal moving components; 2. Deformation from uneven torque or impact during handling; 3. Corrosion from lubricant impurities and environmental moisture.

1. Inspect tube inner surface for wear during each maintenance cycle; 2. Handle carefully to avoid impact damage during installation/disassembly; 3. Clean and lubricate the inner surface regularly.

45# carbon steel; seamless tube structure; heat-treated for wear resistance; precision-machined inner and outer surfaces; compatible with the flanged housing and internal clutch components for power transmission.

4

115.101.02.00

Shoe assembly

1. Friction material wear from continuous clutch engagement; 2. Damage from overheating caused by slippage; 3. Loosening of friction material bonding due to vibration.

1. Replace if friction material thickness is less than 3mm; 2. Avoid prolonged slipping to prevent overheating; 3. Inspect bonding tightness quarterly and replace if loose.

High-temperature resistant friction material (ceramic-reinforced); steel base plate; heat-resistant up to 150℃; designed to provide stable friction for clutch engagement and disengagement.

1

115.101.02

Bolt

1. Thread wear from repeated assembly/disassembly; 2. Fatigue fracture from continuous rig vibration; 3. Corrosion from drilling mud and environmental moisture.

1. Tighten to specified torque (25-30 N·m) with a torque wrench; 2. Apply anti-corrosion grease to threads before installation; 3. Replace after 3-5 disassembly cycles to avoid fatigue failure.

8.8-grade carbon steel; zinc plating for anti-corrosion; precision-threaded; designed to secure the flanged housing and tube assembly, complying with GB fastener standards.

2

Wire

Wire

1. Fatigue breakage from long-term vibration; 2. Corrosion from environmental moisture and drilling contaminants; 3. Abrasion from contact with sharp component edges.

1. Inspect for fraying and corrosion monthly; 2. Avoid contact with sharp edges by using protective sleeves; 3. Replace immediately if any signs of damage are found.

High-strength carbon steel wire; galvanized surface for anti-corrosion; flexible and tensile; used to secure fasteners and prevent vibration-induced loosening in harsh drilling environments.

3

115.101.03

Bolt

1. Thread deformation from over-tightening; 2. Wear from contact with washers and component surfaces; 3. Corrosion from lubricant leakage and moisture infiltration.

1. Use a torque wrench to avoid over-tightening; 2. Pair with compatible washers to distribute pressure; 3. Clean threads thoroughly before installation to prevent debris buildup.

8.8-grade alloy steel; zinc-plated surface; precision-threaded; designed to secure the shoe assembly and internal clutch components, ensuring stable friction transmission.

4

Wire

Wire

1. Breakage from excessive tension during installation; 2. Corrosion from salt spray and high humidity (offshore environments); 3. Wear from repeated contact with moving components.

1. Apply the correct tension during installation (avoid over-stretching); 2. Inspect offshore installations more frequently for corrosion; 3. Keep away from moving components to prevent abrasion.

High-tensile galvanized steel wire; corrosion-resistant coating; compatible with the 115.101.03 bolt; used to reinforce fastener security in high-vibration clutch operation.

5

115.101.04

Shim Set

1. Abrasive wear from contact with other components; 2. Deformation from uneven pressure during clutch adjustment; 3. Corrosion from lubricant impurities and moisture.

1. Use the correct shim thickness for adjustment (avoid stacking too many); 2. Clean shims before installation to remove debris; 3. Replace if worn or deformed to maintain adjustment accuracy.

65Mn spring steel; precision-machined to different thicknesses; heat-treated for elasticity and wear resistance; used to adjust clutch engagement clearance for smooth operation.

6

GB812-67

Nut

1. Thread wear from repeated assembly/disassembly; 2. Corrosion from environmental contaminants and lubricant; 3. Loosening-induced wear from vibration (without lock washers).

1. Tighten to match the corresponding bolt’s torque; 2. Apply anti-corrosion grease to threads; 3. Use with lock washers to prevent vibration-induced loosening.

8.8-grade carbon steel; zinc plating for anti-corrosion; precision-threaded; complies with GB812-67 standard; perfectly matched with 115.101.02 and 115.101.03 bolts for secure locking.

Are these clutch components compatible only with Lanzhou Drawworks JC70?

Yes, all components listed (including the main clutch assembly 115.101.00) are exclusively designed for Lanzhou Drawworks JC70. They are not interchangeable with other drawworks models, as dimensions and performance are tailored to the JC70’s power transmission system. Using non-matching parts will cause engagement failure and potential safety hazards.

How often should I replace the shoe assembly (115.101.02.00)?

The shoe assembly should be inspected monthly for friction material wear. Replace it when the friction material thickness is less than 3mm, or every 6 months under heavy-load operation. Prolonged use of worn shoe assemblies will cause slippage, overheating, and damage to other clutch components.

What should I do if the clutch assembly shows signs of oil contamination?

If oil contamination is found, first identify and fix the oil leak source (e.g., worn seals). Then, disassemble the clutch assembly, clean all components (especially the shoe assembly and internal friction surfaces) with a suitable degreaser, and reassemble with new lubricant. Avoid operating the clutch until contamination is fully resolved to prevent slippage.