Air Piping for Lanzhou Drawworks JC70

1. Core Purpose & Equipment Adaptation

This document focuses on the Air Piping System exclusively designed for the Lanzhou Drawworks JC70, including all supporting components such as nipples, valves, pipe clamps, bolts, and filters (full component models are provided in the original accessory list). It is tailored to meet the segmented needs of drilling engineering teams, on-site maintenance technicians, procurement personnel, and equipment management staff in the petroleum drilling industry. As a critical auxiliary system of the Lanzhou Drawworks JC70, the air piping is mainly responsible for transmitting clean, stable compressed air to key components of the drawworks—including the rotorseal airflex, pressure relay valve, and gas control valve—ensuring the safe and efficient operation of the drawworks during drilling, hoisting, and lowering operations. All components fully comply with national and industry standards such as GB (Guobiao), JB/ZQ (Mechanical Industry Standard), and HG (Chemical Industry Standard), guaranteeing perfect compatibility with the Lanzhou Drawworks JC70, reliable performance, and long service life. Choosing this air piping system and its matching accessories avoids costly equipment downtime caused by mismatched, low-quality parts, reduces maintenance costs, and ensures the drawworks operates stably in harsh drilling environments.

2. Product Introduction

The air piping system for Lanzhou Drawworks JC70 is a integrated, standardized air transmission system composed of high-quality pipelines, connectors, control valves, filters, and fixing components. It is specifically developed to adapt to the working characteristics of the Lanzhou Drawworks JC70, integrating air transmission, pressure control, filtration, and fixing functions. The system adopts precision-manufactured components that strictly follow GB3289 (Steel Pipe Standards), GB5781 (Bolt Standards), JB/ZQ4492 (Pipe Clamp Standards), and other relevant specifications, ensuring consistent dimensional accuracy, tight sealing, and strong pressure resistance. The system covers all air transmission needs of the drawworks, from air intake filtration to pressure regulation, and from pipeline transmission to component connection, providing clean, stable, and controllable compressed air for each key component, effectively supporting the normal operation of the drawworks’ hoisting, braking, and other core functions. All components are made of corrosion-resistant, wear-resistant materials, suitable for long-term use in outdoor, dusty, and high-humidity drilling scenarios.

3. Function Description

The air piping system for Lanzhou Drawworks JC70 undertakes multiple critical functions to ensure the safe and efficient operation of the drawworks, with clear division of labor and coordinated operation among all components:

Air Transmission: Through high-quality steel pipes, copper pipes, and hose assemblies, the system stably transmits compressed air from the air source to each key component of the Lanzhou Drawworks JC70, ensuring continuous air supply for the drawworks’ core mechanisms (such as rotorseal airflex and valve shifter).

Pressure Control: Equipped with pressure relay valves (QY411), pressure switches (IS3000-02), and gas control valves (QY422), the system monitors and adjusts the air pressure in real time, ensuring the air pressure remains within the safe operating range (0.6-1.0MPa) required by the drawworks, preventing equipment damage caused by excessive or insufficient pressure.

Air Filtration: The air filter in the system effectively filters impurities, moisture, and oil mist in the compressed air, avoiding abrasion, blockage, or corrosion of internal components (such as valves and seals) caused by unclean air, extending the service life of the drawworks’ air-consuming components.

Pipeline Fixing: Through pipe clamp plates, pipe clamp bases, supports, and other components, the system firmly fixes the pipelines to the drawworks body, reducing vibration-induced pipeline displacement, friction, and leakage during the drawworks’ operation, ensuring the structural stability of the air transmission system.

Connection & Sealing: Using precision nipples, couplings, bushings, and sealing components (such as washers and O-rings), the system achieves tight connection between all parts, preventing air leakage, ensuring the air pressure stability of the entire system, and avoiding energy waste and performance degradation.

Pressure Monitoring: Equipped with pressure gauges and pressure gauge boxes (106.68.272.00), the system allows on-site personnel to monitor the air pressure in real time, facilitating timely discovery and handling of pressure abnormalities, ensuring the safe operation of the system.

4. Structural Characteristics

The air piping system for Lanzhou Drawworks JC70 adopts a scientific, reasonable structural design, combining practicality, stability, and maintainability, with the following prominent characteristics:

Standardized Design: All components strictly follow national and industry standards (GB, JB/ZQ, HG), with unified dimensional standards and interface specifications, ensuring perfect compatibility with the Lanzhou Drawworks JC70 and easy replacement of accessories.

Modular Structure: The system is divided into air filtration module, pressure control module, pipeline transmission module, and fixing module, with clear structure and independent functions. This design facilitates on-site maintenance, inspection, and replacement of components, reducing maintenance time and labor costs.

Strong Pressure Resistance: The pipelines (steel pipes, copper pipes) and connectors adopt high-strength materials, with a maximum working pressure of 1.6MPa, which is higher than the safe operating pressure of the Lanzhou Drawworks JC70, effectively preventing pipeline bursting or leakage caused by pressure impact.

Corrosion & Wear Resistance: All metal components (bolts, pipe clamps, nipples) are treated with anti-corrosion processes (such as galvanizing), and the hose assemblies adopt oil-resistant, wear-resistant rubber materials, which can resist corrosion from outdoor rain, dust, and drilling fluid, and wear from long-term vibration and friction.

Easy Maintainability: The system’s control valves, filters, and other key components are installed in easily accessible positions, and the pipeline connections adopt detachable connectors (such as quick couplings and unions), facilitating on-site inspection, cleaning, and replacement of components without disassembling the entire system.

Stable Fixing Structure: The pipeline fixing components (pipe clamps, supports) are designed according to the structure of the Lanzhou Drawworks JC70, with strong bearing capacity, effectively reducing pipeline vibration during the drawworks’ operation, avoiding pipeline fatigue and damage, and ensuring the stability of the air transmission system.

5. Applicable Working Conditions

The air piping system for Lanzhou Drawworks JC70 is specifically designed for the harsh working environment of petroleum drilling, with strong environmental adaptability, and is suitable for the following working conditions:

Outdoor Drilling Sites: Adaptable to outdoor temperature changes (-30℃ ~ +60℃), able to resist rain, snow, wind, and dust, ensuring normal operation in extreme weather conditions.

Dusty & High-Humidity Environments: The air filter effectively filters dust and moisture, and the anti-corrosion components resist humidity-induced corrosion, suitable for use in coastal, desert, and other high-humidity, dusty drilling areas.

High-Vibration Working Scenarios: The stable fixing structure and shock-resistant components reduce the impact of the drawworks’ vibration on the pipeline system, avoiding pipeline loosening, leakage, and damage, suitable for long-term high-intensity hoisting operations of the drawworks.

Petroleum Drilling Operations: Adaptable to the working environment of oilfields, able to resist corrosion from oil mist and drilling fluid, ensuring stable air supply for the drawworks during drilling, hoisting, and lowering operations.

Mobile Drilling Scenarios: The modular structure and standardized components facilitate the disassembly, assembly, and transportation of the air piping system when the drawworks is transferred between drilling sites, improving the efficiency of equipment transfer.

6. Maintenance & Care Suggestions

To extend the service life of the air piping system for Lanzhou Drawworks JC70, ensure its stable performance, and reduce maintenance costs, the following maintenance and care suggestions are provided, which are practical and operable, suitable for on-site maintenance personnel:

Daily Inspection (Before Operation): Check the pipeline connections (nipples, couplings, bushings) for air leakage; check the pressure gauge reading to ensure it is within the safe range (0.6-1.0MPa); check the air filter for blockage (clean or replace if the filter element is dirty); check the pipe clamps and supports for looseness, and re-tighten if necessary.

Weekly Maintenance: Clean the surface of the pressure gauge box and pressure gauge to ensure clear reading; inspect the hose assemblies for wear, bulging, or cracking (replace immediately if any abnormality is found); check the valve shifter (QY425) and gas control valve (QY422) for flexible operation, and apply lubricating grease if necessary; clean the surface of the pipeline and components to remove dust and oil stains.

Monthly Maintenance: Disassemble and clean the air filter element (replace if damaged); check the pressure relay valve (QY411) and pressure switch (IS3000-02) for accurate pressure control, and calibrate if necessary; inspect the bolts, nuts, and washers for corrosion or wear, and replace if necessary; check the steel pipes and copper pipes for rust or deformation, and clean or replace if necessary.

Quarterly Maintenance: Inspect all pipe clamps, pipe clamp plates, and supports for deformation or wear, and replace if necessary; check the hose assemblies for aging (replace if the rubber becomes hard or brittle); inspect the couplings and unions for thread wear, and apply thread sealant if necessary; conduct a comprehensive pressure test on the entire pipeline system (test pressure 1.5 times the working pressure) to check for leakage.

Long-Term Shutdown Maintenance: If the drawworks is shut down for more than 1 month, release the air pressure in the pipeline system; disassemble the air filter and store it in a dry, clean place; clean all components and apply anti-rust grease to the metal surfaces; cover the pipeline ports with dust caps to prevent dust intrusion; store the disassembled components in a dry, ventilated place to avoid corrosion.

Key Notes: Use only original matching accessories for replacement (strictly follow the model specifications in the original list); avoid using damaged or expired components; do not over-tighten bolts or nuts to prevent thread damage or component deformation; ensure the pipeline is not bent excessively during maintenance to avoid pipeline damage; keep maintenance records, including maintenance time, content, and replaced components, for subsequent tracking and reference.

7. On-Site Fault Maintenance Cases

The following are 4 real on-site fault maintenance cases of the air piping system for Lanzhou Drawworks JC70, which are common in drilling scenarios. Each case includes fault phenomena, root causes, and solutions, providing practical reference for on-site maintenance personnel:

Case 1: Air Leakage at Pipeline Connections, Resulting in Insufficient Air Pressure

Fault Phenomenon: During the operation of the Lanzhou Drawworks JC70, the pressure gauge shows that the air pressure is only 0.4MPa (lower than the safe range of 0.6-1.0MPa), the drawworks’ hoisting speed is significantly reduced, and a clear air leakage sound is heard at the pipeline connections. After inspection, air leakage occurs at multiple nipple (F11-6-93) and coupling (106.28.270.06) connections.

Root Cause: Long-term vibration during the drawworks’ operation leads to loosening of the thread connections between nipples and couplings; the thread sealant at the connections ages and fails, resulting in air leakage; the maintenance personnel did not check and re-tighten the connections during daily inspection.

Solution: Stop the drawworks operation and release the air pressure in the pipeline system; use a torque wrench to re-tighten the loose nipples and couplings; disassemble the leaking connections, clean the thread surfaces, and reapply high-temperature, high-pressure thread sealant; assemble the connections again and tighten to the specified torque; conduct a pressure test (test pressure 1.2MPa) to confirm no air leakage; after the test, reset the pressure to the normal working range (0.7MPa), and start the drawworks to check the operation status. The fault is completely resolved, and the air pressure remains stable.

Case 2: Air Filter Blockage, Resulting in Poor Air Supply

Fault Phenomenon: The Lanzhou Drawworks JC70 frequently shuts down automatically during operation, and the pressure switch (IS3000-02) alarms. After inspection, the air filter is severely blocked, the air intake is insufficient, and the pressure relay valve (QY411) fails to trigger normally, resulting in insufficient air supply to the rotorseal airflex, leading to automatic shutdown of the drawworks.

Root Cause: The drilling site is dusty, and the air filter element is not cleaned or replaced in time (the filter element has not been replaced for more than 3 months); a large amount of dust accumulates on the filter element, blocking the air intake, resulting in insufficient air flow and low air pressure.

Solution: Stop the drawworks operation, disassemble the air filter, and replace the blocked filter element with a new original matching filter element; clean the filter housing to remove dust and impurities; assemble the air filter again, and check the air intake status; calibrate the pressure switch (IS3000-02) and pressure relay valve (QY411) to ensure accurate pressure control; start the drawworks to test, and the air supply is normal, and the automatic shutdown fault no longer occurs. It is recommended to shorten the air filter cleaning cycle to 2 weeks in dusty drilling sites.

Case 3: Hose Assembly Aging and Bursting, Resulting in Air Leakage and Equipment Shutdown

Fault Phenomenon: During the hoisting operation of the Lanzhou Drawworks JC70, a sudden "pop" sound is heard, and the drawworks stops working immediately. After inspection, the HG4-406-75 hose assembly connected to the valve shifter (QY425) is burst, and a large amount of compressed air leaks, resulting in a sharp drop in system air pressure to 0MPa.

Root Cause: The hose assembly has been used for more than 12 months, and long-term exposure to outdoor sunlight and high temperature leads to aging of the rubber material (the rubber becomes hard and brittle); the hose is frequently bent during the drawworks’ operation, resulting in fatigue and breakage of the internal steel wire reinforcement layer, and finally bursting under high air pressure.

Solution: Stop the drawworks operation, cut off the air source, and replace the burst HG4-406-75 hose assembly with a new original matching hose assembly; check the adjacent hose assemblies for aging or wear, and replace any abnormal ones; ensure the new hose assembly is installed correctly, avoiding excessive bending (the minimum bending radius is not less than 5 times the inner diameter of the hose); re-test the pipeline system for air leakage, and reset the air pressure to the normal range; start the drawworks to check the operation status, and the fault is resolved. It is recommended to replace all hose assemblies every 8-10 months to avoid aging and bursting.

Case 4: Pressure Relay Valve Malfunction, Resulting in Unstable Air Pressure

Fault Phenomenon: The air pressure of the Lanzhou Drawworks JC70’s air piping system fluctuates greatly (0.5-1.2MPa), and the pressure gauge pointer shakes violently; the drawworks’ braking system occasionally fails, posing a safety hazard. After inspection, the pressure relay valve (QY411) fails to adjust the pressure normally, and the valve core is stuck.

Root Cause: The compressed air contains excessive moisture and oil mist (the air filter is not maintained in time), which causes corrosion and scaling of the pressure relay valve’s core; the valve core is stuck, unable to open and close flexibly, resulting in unstable pressure regulation.

Solution: Stop the drawworks operation, disassemble the pressure relay valve (QY411), and clean the valve core, valve seat, and other components with clean diesel oil to remove scale and oil stains; check the valve core for wear or corrosion, and replace if necessary; assemble the pressure relay valve again, and calibrate the pressure regulation range (0.6-1.0MPa); replace the air filter element, and check the air source for moisture and oil mist (install a dryer if necessary); start the drawworks to test, and the air pressure remains stable, and the braking system operates normally. It is recommended to strengthen the maintenance of the air filter and regularly drain moisture from the air source.

8. FAQ (Frequently Asked Questions)

The following are 5 common questions about the air piping system for Lanzhou Drawworks JC70, which are highly consistent with the user’s actual needs (maintenance, procurement, fault handling, etc.). The answers are practical, professional, and easy to understand, avoiding professional jargon that is difficult to understand:

9. Procurement Guide

The air piping system and its matching components for Lanzhou Drawworks JC70 are professional, standardized products developed for the petroleum drilling industry, integrating reliability, durability, and maintainability. All components are made of high-quality materials, strictly follow national and industry standards (GB, JB/ZQ, HG), and undergo strict quality inspection and pressure testing before leaving the factory, ensuring perfect compatibility with the Lanzhou Drawworks JC70 and stable performance in harsh drilling environments. Choosing this system and its accessories can effectively solve the common problems of inferior products—such as mismatching, poor sealing, short service life, and easy damage—avoid costly equipment downtime, reduce maintenance costs, and ensure the continuous and stable operation of your Lanzhou Drawworks JC70. We provide a complete set of accessories (covering all models in the original list), as well as professional technical support and after-sales service, including on-site installation guidance, maintenance training, and fault handling advice. Whether you need to purchase a complete air piping system, replace worn components, or reserve spare parts for emergencies, we can meet your personalized procurement needs. Please refer to the original accessory list for the specific model and quantity of the required components, and contact us for procurement. We are committed to providing you with high-quality products, reasonable prices, and thoughtful service, helping you improve the operation efficiency of the drawworks, reduce operational risks, and create greater value for your drilling operations.

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