Parts for Lanzhou LS Drawworks Model JC70

1. Introduction

This document is exclusively tailored for Lanzhou LS Drawworks Model JC70, a core piece of drilling equipment widely applied in onshore and offshore oil & gas exploration, as well as large-scale geological drilling projects. It focuses on the key component groups of the JC70 drawworks, including Drumshaft Group, Main Drive Shaft Group, Jackshaft Group, and related oil/air/water & mechanical control parts. The content is designed to meet the segmented needs of different users: for procurement personnel, it provides clear part identification, standard specifications, and authoritative procurement benchmarks; for technical maintenance teams, it offers detailed functional explanations, structural analysis, fault diagnosis, and maintenance protocols to solve on-site technical problems efficiently and ensure the stable operation of the drawworks.

1.1 Core Purpose

The core purpose of this guide is to serve as a dual-reference tool for procurement and technical support of Lanzhou LS JC70 drawworks parts. It standardizes the part selection and procurement process to avoid mismatches, reduces equipment downtime caused by part failure or improper maintenance, extends the service life of the drawworks, and ensures the safety and efficiency of drilling operations by providing accurate technical parameters and practical maintenance solutions.

2. Product Overview

The parts covered in this document are original-matching and compatible components for Lanzhou LS JC70 drawworks, including transmission shaft assemblies, clutches, valves, connectors, and control system parts (e.g., 106.33.20.00 Drumshaft Assembly, 115.101.00 LT300/100T Clutch, 116.34.00 Quick Release Valve). All parts comply with national drilling equipment standards (GB68-76, GB93-76, etc.) and Lanzhou LS’s original design specifications, ensuring high interchangeability, wear resistance, and pressure resistance. These components form the core transmission and control system of the JC70 drawworks, directly affecting the equipment’s lifting capacity, speed regulation performance, and operational safety.

3. Functional Description

3.1 Key Component Functions

Drumshaft Group: The 106.33.20.00 Drumshaft Assembly and 106.30.21.00 Drum form the core lifting structure, responsible for winding and releasing the drilling wireline to realize the lifting and lowering of drilling tools. The high clutch (115.33.00) and low clutch (115.34.00) control the speed switching of the drum, adapting to different lifting loads and operation requirements.

Main Drive Shaft Group: The 106.68.30.00 Main Drive Shaft Assembly transmits power from the prime mover to the drumshaft group, while the 115.101.00 LT300/100T Clutch ensures stable power connection and disconnection, preventing impact damage to the transmission system during startup and shutdown.

Jackshaft Group: The 106.68.40.00 Jackshaft Assembly plays a role in power transmission and speed adjustment, coordinating the operation of the main drive shaft and drumshaft, and improving the overall stability of the transmission system.

Control System Parts: Quick release valves (116.34.00, 116.20.00) regulate the air and hydraulic pressure to ensure rapid response of the clutch and control mechanism; air & water connector assemblies (116.17.00, 116.18C.00) realize the reliable transmission of air and cooling water, preventing overheating of key components during long-term operation.

3.2 Overall Functional Advantages

The integrated function of these parts enables the JC70 drawworks to achieve stepless speed regulation, stable load-bearing, and rapid control, meeting the requirements of high-intensity drilling operations. The independent control of air, water, and lubrication systems ensures the rational distribution of energy and effective protection of components, reducing the failure rate during continuous operation.

4. Structural Characteristics

4.1 Transmission System Structure

The transmission system of the JC70 drawworks adopts a modular design, with Drumshaft Group, Main Drive Shaft Group, and Jackshaft Group as independent modules. This design facilitates disassembly, inspection, and replacement of parts, reducing maintenance time. The shaft components are made of high-strength alloy steel,经过 quenching and tempering treatment to improve hardness and toughness, ensuring resistance to fatigue and impact under high load conditions.

4.2 Control System Structure

The oil/air/water and mechanical control system adopts an integrated pipeline layout, with standardized connectors and valves (e.g., 3/4" NPT, M20X1.5 specifications) to ensure tight connection and prevent leakage. The mechanical shifter installation (106.68.70.00) adopts a gear transmission structure, which has high transmission efficiency and stable operation, and can accurately realize the switching of working gears.

4.3 General Structural Advantages

All key parts are equipped with standardized fasteners (GB30-76 bolts, GB52-76 nuts, GB93-76 washers) to ensure assembly accuracy and structural stability. The bearing retainers (GB94-76) and seals (D5-8-73, D4-4-66 O-rings) are reasonably designed to prevent dust, water, and lubricating oil leakage, extending the service life of internal components.

5. Applicable Working Conditions

The parts described in this document are suitable for the working conditions of Lanzhou LS JC70 drawworks, including but not limited to:

Onshore Oil & Gas Drilling: Adapt to various geological conditions such as desert, grassland, and mountainous areas, and can work stably under ambient temperatures of -20℃ to 50℃.

Offshore Drilling Platforms: With good corrosion resistance and waterproof performance, it can adapt to the marine environment with high humidity, salt spray, and strong wind.

Large-Scale Geological Drilling: Suitable for deep geological exploration, mineral resource development, and other projects, able to bear long-term high-load operation requirements.

Emergency Repair Operations: The modular design and quick-wear parts (e.g., seals, washers) can be replaced quickly, adapting to the emergency repair needs of drilling equipment.

Note: The parts shall not be used in ultra-high temperature (>60℃), ultra-low temperature (<-30℃), or strong corrosive (e.g., strong acid, strong alkali) environments beyond the design specifications, so as to avoid premature failure.

6. Maintenance & Care Recommendations

6.1 Daily Maintenance

Check the tightness of fasteners (bolts, nuts, washers) daily, and re-tighten them in time if loose to prevent component displacement or damage.

Inspect the sealing performance of air, water, and oil pipelines, and replace damaged seals (O-rings, gaskets) immediately if leakage is found.

Clean the surface of components regularly to remove dust, oil stains, and debris, especially the valve core and connector interface, to avoid blockage.

6.2 Regular Maintenance

Every 500 working hours: Replace the lubricating oil in the lubrication system (106.68.285.00), clean the oil filter, and check the wear of bearings (110, 113).

Every 1000 working hours: Disassemble and inspect the clutch (115.33.00, 115.34.00, 115.101.00), check the wear of friction plates, and replace them if the wear exceeds the limit (≤0.5mm).

Every 2000 working hours: Inspect the drumshaft, main drive shaft, and jackshaft for deformation or cracks, and perform non-destructive testing if necessary; replace the quick release valves and connectors if there is aging or failure.

6.3 Storage & Handling

When storing spare parts, keep them in a dry, ventilated, and clean warehouse, away from moisture and corrosive substances; for shaft components and bearings, apply anti-rust oil to prevent rust. During handling, avoid collision and impact, and use special tools to lift heavy components (e.g., drumshaft assembly) to prevent deformation or damage.

7. On-Site Fault Repair Cases

Case 1: Clutch Slip Failure

Fault Phenomenon: During the lifting operation of the JC70 drawworks, the high clutch (115.33.00) slips, the lifting speed decreases, and the clutch surface generates heat. Diagnosis: After disassembly, it is found that the friction plates of the high clutch are severely worn, and the flat spring (115.33.03) loses elasticity. Repair Solution: Replace the worn friction plates and flat spring, re-adjust the clutch clearance to 0.8-1.2mm, and clean the clutch internal oil stains. Result: The clutch operates normally, no slip occurs, and the lifting performance is restored.

Case 2: Quick Release Valve Leakage

Fault Phenomenon: The 116.34.00 3/4" NPT quick release valve leaks air during operation, resulting in insufficient air pressure of the control system and slow response of the clutch. Diagnosis: Check the valve core and sealing ring of the quick release valve, and find that the sealing ring is aging and deformed, and the valve core has dirt blockage. Repair Solution: Replace the aging sealing ring, clean the valve core and valve body, and re-install and test the air tightness. Result: The air leakage is eliminated, the air pressure of the control system is stable, and the clutch response speed is restored to the standard level.

Case 3: Drumshaft Vibration Excessive

Fault Phenomenon: During the operation of the drawworks, the drumshaft (106.33.20.00) vibrates excessively, accompanied by abnormal noise, which affects the operation stability.Diagnosis: Check the drumshaft bearing (113) and find that the bearing is worn and the inner ring is loose; the pipe sleeve (106.06.20.44) is deformed. Repair Solution: Replace the worn bearing and deformed pipe sleeve, re-calibrate the coaxiality of the drumshaft, and tighten the fixed bolts. Result: The vibration of the drumshaft is reduced to the standard range (<0.1mm), and the abnormal noise disappears.

8. FAQ (Frequently Asked Questions)

9. Procurement Guide & Call to Action

9.1 Procurement Reference Standards

When purchasing parts for Lanzhou LS JC70 drawworks, please strictly refer to the part numbers and specifications listed in this document (e.g., 106.33.20.00 Drumshaft Assembly, 115.101.00 LT300/100T Clutch) to ensure compatibility with the original equipment. It is recommended to choose parts that meet national drilling equipment standards and Lanzhou LS’s original technical requirements, with formal quality inspection certificates and after-sales service guarantees, to avoid safety hazards caused by inferior parts.

9.2 Call to Action

We provide full-series original-matching and high-quality compatible parts for Lanzhou LS Drawworks Model JC70, covering all component groups mentioned in this document. Whether you need to purchase spare parts for daily maintenance or emergency repair, we can provide customized solutions and professional technical support. Contact us now to get detailed part quotes and technical consultation, and ensure the continuous and stable operation of your JC70 drawworks.

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