Parts List for Lanzhou LS Swivel SL225-3

Introduction

This document is exclusively developed for the Lanzhou LS Swivel SL225-3, a critical rotating component widely used in oilfield drilling operations. It focuses on providing comprehensive, practical guidance related to the swivel’s parts, including an overview of the equipment, core functions, structural features, applicable working conditions, maintenance guidelines, on-site fault solutions, frequently asked questions, and procurement advice. Unlike generic parts lists, this document is tailored specifically to the Lanzhou LS Swivel SL225-3, integrating authoritative technical specifications, real-world operational experience, and clear user-oriented content.

Designed for maintenance engineers, procurement managers, and technical supervisors working with the Lanzhou LS Swivel SL225-3, this document serves as a one-stop reference to address daily operational needs—from accurately identifying parts and resolving on-site faults to standardizing procurement processes and ensuring the swivel operates safely and efficiently. By following the guidance provided, users can minimize equipment downtime, reduce maintenance costs, and extend the overall service life of the Lanzhou LS Swivel SL225-3.

Core Purpose & Target User Demand

The Lanzhou LS Swivel SL225-3 is a key piece of drilling equipment used to connect the stationary drill string to the rotating Kelly, enabling the transfer of drilling fluid (mud) and torque while accommodating the vertical movement of the drill string during oilfield drilling operations. Its core purpose is to ensure the continuous, leak-free circulation of drilling fluid, maintain stable torque transmission, and support the weight of the drill string—all of which are critical to the safety and efficiency of drilling operations. A faulty swivel can lead to drilling fluid leakage, drill string jamming, or even serious safety accidents.

This document targets three key user groups with distinct, specific needs, ensuring each group gains practical value:

• On-Site Maintenance Engineers: These professionals need clear guidance on parts identification, common fault diagnosis, and step-by-step repair methods to quickly resolve issues and minimize drilling downtime. They also require easy-to-understand maintenance tips to prevent faults from occurring.

• Procurement Managers: Responsible for sourcing spare parts, these users need accurate parts models, specifications, and compatibility information to avoid mismatches during purchasing. They also benefit from procurement guidelines to ensure they select high-quality, compatible parts that meet the swivel’s operational requirements.

• Technical Supervisors: These users need comprehensive knowledge of the swivel’s structure, functions, and maintenance requirements to develop scientific operational procedures, train maintenance teams, and ensure compliance with drilling safety standards.

Product Overview

The Lanzhou LS Swivel SL225-3 is a high-performance, heavy-duty swivel designed for medium to deep oilfield drilling operations. It is engineered to withstand harsh drilling environments, high pressure, and heavy loads, complying with Chinese national standards (GB series) and industry specifications (such as F series, D series) to ensure reliability and durability.

The swivel consists of several key components, including the main Swivel body (model 104-18.00), Bail (104.14.04) for lifting and supporting the swivel, Gooseneck (104.05.33) for drilling fluid circulation, Packing Assembly (104.05.30.00) for leak prevention, and Pneumatic Motor and Drive System (104.07.06.00) for power transmission. It also includes a range of standard fasteners (such as GB898-88 Studs, GB6170-86 Nuts, and GB93-87 Spring Washers), bearings (GB297-84, GB283-81), seals (O-rings, oil seals), and pipelines—all carefully selected to match the swivel’s technical parameters and operational requirements.

Key features of the Lanzhou LS Swivel SL225-3 include its robust structure, leak-free sealing performance, smooth rotation, and easy maintenance. The swivel’s design prioritizes reliability and operability, with standardized components that simplify parts replacement and on-site maintenance.

Functional Description

The Lanzhou LS Swivel SL225-3 performs four critical functions that are essential to successful drilling operations, working together to ensure the drill string operates smoothly and safely:

• Drilling Fluid Circulation: The swivel acts as a channel for drilling fluid (mud) to flow from the stationary mud hose to the rotating drill string. The Gooseneck (104.05.33), Wash Pipe (104.05.30.14), and related pipelines (104.07.02.00-1) deliver the drilling fluid to the drill bit, cooling the bit, removing cuttings, and maintaining pressure in the wellbore to prevent well collapse.

• Torque Transmission: The swivel connects the stationary drill rig to the rotating Kelly, transferring torque from the rig’s rotary table to the drill string. Components such as the Gear-ring (disc) (104.07.03), Gear Shaft (104.07.06.24), and Pneumatic Motor (FMS-20) ensure stable torque transmission, enabling the drill bit to rotate and penetrate the formation.

• Load Bearing: The Bail (104.14.04) and supporting components (such as Support. gooseneck 104.07.01) bear the weight of the entire drill string, allowing vertical movement of the drill string during drilling (e.g., when tripping in or out of the well) while maintaining stability.

• Leak Prevention & Sealing: The Packing Assembly (104.05.30.00), O-rings (D4-4-66 series), Oil Seals (D7-1-67), and other sealing components prevent drilling fluid leakage at rotating and stationary joints. This ensures the drilling fluid circulates efficiently and protects the swivel’s internal components from contamination.

Structural Characteristics

The Lanzhou LS Swivel SL225-3 features a scientific, robust structural design that prioritizes reliability, durability, and ease of maintenance—critical for withstanding the harsh conditions of oilfield drilling. Its key structural characteristics are as follows:

• Robust Main Body Structure: The main Swivel body (104-18.00) is made of high-strength alloy steel,经过 heat treatment to enhance its load-bearing capacity and wear resistance. It can withstand high pressure (up to the swivel’s rated working pressure) and heavy loads without deformation or damage.

• Modular Component Design: The swivel is composed of independent functional modules, including the fluid circulation module (gooseneck, wash pipe), torque transmission module (pneumatic motor, gear system), sealing module (packing assembly, O-rings), and lifting module (bail, support). Each module connects via standardized fasteners and connectors, making it easy to disassemble, inspect, and replace parts on-site.

• High-Performance Sealing Structure: The swivel adopts a multi-layer sealing design, with the Packing Assembly (104.05.30.00) as the core sealing component. It is supplemented by O-rings (in various sizes, such as D4-4-66 120x5.7, 165x8.6) and Oil Seals (D7-1-67 220x260x18) to ensure leak-free operation. The packing can be adjusted or replaced without disassembling the entire swivel, simplifying maintenance.

• Stable Rotation System: The swivel is equipped with high-precision bearings (GB297-84 2007140, GB283-81 32240, 32510) that reduce friction during rotation, ensuring smooth, stable operation even under heavy loads. The bearings are protected by seals and lubrication systems to prevent contamination and extend their service life.

• Standardized Components: All parts of the swivel, including fasteners (studs, nuts, washers), connectors, and seals, comply with national (GB series) and industry standards. This ensures interchangeability and universality of parts, making procurement and replacement easier and more cost-effective.

Applicable Working Conditions

The Lanzhou LS Swivel SL225-3 is specifically designed to operate in the harsh, demanding conditions of oilfield drilling, ensuring reliable performance in the following scenarios:

• Environmental Temperature: The swivel operates normally in temperatures ranging from -25℃ to 70℃, adapting to the seasonal temperature changes of onshore oilfields—from cold northern winters to hot southern summers. It can withstand high temperatures generated by friction during rotation without affecting performance.

• Working Pressure: The swivel’s rated working pressure is compatible with medium to deep drilling operations (typically 35-70 MPa), ensuring the safe circulation of drilling fluid even under high wellbore pressure. The sealing system and main body are designed to withstand these pressures without leakage or damage.

• Environmental Medium: The swivel is resistant to drilling fluid (mud), which contains solids, chemicals, and corrosive substances. Components such as the packing, O-rings, and main body are made of corrosion-resistant materials to prevent damage from prolonged exposure to drilling fluid.

• Vibration & Shock: Drilling operations generate significant vibration and shock. The swivel’s robust structure, stable bearing system, and secure fasteners (GB5781-86 Bolts, GB93-87 Spring Washers) absorb vibration and shock, preventing component loosening or damage.

• Application Scenarios: The Lanzhou LS Swivel SL225-3 is mainly used in onshore oilfield drilling operations, suitable for medium to deep wells (drilling depth up to 5,000 meters). It is compatible with various drilling rigs and drill string configurations, making it a versatile choice for oilfield operations.

Maintenance & Care Recommendations

Regular maintenance of the Lanzhou LS Swivel SL225-3 is critical to ensuring its reliable operation, preventing faults, and extending its service life. All maintenance operations must be performed after the drilling rig is shut down, the swivel is disconnected from the drill string, and the drilling fluid pressure is released—this ensures operator safety and prevents accidents.

Daily Inspection (Once per Shift)

• Check for drilling fluid leakage: Inspect all joints, packing glands, O-rings, and pipelines for leakage. If leakage is found, tighten the packing nut (104.05.30.07, 104.05.30.13) or replace the damaged O-ring/packing promptly.

• Inspect the swivel’s rotation: Rotate the swivel manually to check for smooth operation—there should be no jamming, abnormal noise, or excessive friction. If issues are found, check the bearings or lubrication system.

• Check fasteners: Inspect all studs (GB898-88), bolts (GB5781-86, GB5783-86), nuts (GB6170-86), and spring washers (GB93-87) for tightness. Re-tighten any loose fasteners to prevent component loosening due to vibration.

• Check lubrication: Inspect the grease fittings (GB1152-89 M10X1) and ensure the bearings and gear system are properly lubricated. Add grease if the lubrication level is too low.

• Inspect the gooseneck and pipelines: Check for damage, corrosion, or blockage in the gooseneck (104.05.33), wash pipe (104.05.30.14), and related pipelines. Clear any blockages and repair or replace damaged components.

Regular Maintenance (Once per Week)

• Clean the swivel: Use clean water or diesel oil to clean the external surface of the swivel, removing drilling fluid, mud, and debris. This prevents corrosion and makes it easier to detect leaks or damage.

• Inspect the packing assembly: Check the Packing Assembly (104.05.30.00) for wear, deformation, or hardening. Adjust the packing nut to ensure proper sealing, or replace the packing if it is severely worn.

• Lubricate components: Apply high-temperature, anti-corrosion grease to the bearings (GB297-84, GB283-81), gear system (Gear-ring 104.07.03, Gear Shaft 104.07.06.24), and other moving parts. Ensure all lubrication points are properly greased to reduce friction.

• Inspect O-rings and oil seals: Check all O-rings (D4-4-66 series) and oil seals (D7-1-67) for cracks, aging, or damage. Replace any faulty seals to prevent leakage.

• Check the pneumatic motor and drive system: Inspect the Pneumatic Motor (FMS-20) and related components for abnormal noise, air leakage, or wear. Clean the motor and check the air supply pipeline for blockage.

Monthly Maintenance (Once per Month)

• Disassemble and inspect key components: Disassemble the packing gland (upper and lower), check the packing, spacer (104.05.30.02-1, 104.05.30.10), and wash pipe for wear. Replace any damaged parts.

• Inspect bearings: Remove the bearings and check for wear, corrosion, or damage. If the bearings are worn or have excessive play, replace them with new ones of the same model (e.g., GB297-84 2007140).

• Inspect the gear system: Check the Gear-ring (104.07.03) and Gear Shaft (104.07.06.24) for tooth wear, cracks, or deformation. Adjust the gear clearance if necessary, or replace the gear if it is severely damaged.

• Check the bail and support components: Inspect the Bail (104.14.04), Pin.bail (104.14.06), and Support. gooseneck (104.07.01) for wear, deformation, or cracks. Replace any damaged components to ensure safe lifting.

• Test the swivel: After maintenance, reassemble the swivel, connect it to the drill rig, and perform a test run. Check for leakage, smooth rotation, and stable torque transmission—ensure the swivel operates normally before putting it back into service.

Maintenance Notes

• Always use parts that match the original model and specification (detailed in the subsequent parts list). Non-original parts may have mismatched sizes, poor quality, or incompatible performance, leading to leaks, component damage, or safety hazards.

• Use only the recommended lubricants and greases—high-temperature, anti-corrosion grease for bearings and gear systems, and compatible sealants for joints. Avoid mixing different types of lubricants or using low-quality products.

• Keep maintenance records: Document the maintenance date, tasks performed, parts replaced, and test results. This helps track the swivel’s performance and plan future maintenance.

• Store spare parts in a clean, dry, and corrosion-free environment. Label parts clearly to avoid confusion during replacement, and ensure they are protected from dust and moisture.

• Only trained, qualified personnel should perform maintenance operations. Follow safety procedures at all times to prevent accidents (e.g., wear protective equipment, shut down the drill rig before maintenance).

Lanzhou LS Swivel SL225-3 parts list

On-Site Fault Maintenance Cases

The following are 3 real on-site fault cases of the Lanzhou LS Swivel SL225-3, including fault phenomena, cause analysis, and step-by-step solutions. These cases provide practical guidance for maintenance engineers to quickly resolve common issues and minimize downtime.

Case 1: Drilling Fluid Leakage from the Upper Packing Gland

Fault Phenomenon: During drilling operations, drilling fluid leaks significantly from the upper packing gland (Housing.packing gland (upper) 104.05.30.01-1). The leakage increases with the increase of drilling fluid pressure, affecting drilling efficiency and causing environmental pollution.

Cause Analysis: On-site inspection reveals that the Packing Assembly (104.05.30.00) is severely worn and hardened due to prolonged use (over 3 months without replacement). The packing can no longer seal effectively, leading to drilling fluid leakage. Additionally, the Nut. upper packing gland (104.05.30.07) is loose, further worsening the leakage.

Solution: Shut down the drill rig, release the drilling fluid pressure, and disconnect the swivel from the drill string. Loosen the Nut. upper packing gland (104.05.30.07), remove the worn Packing Assembly (104.05.30.00), and replace it with a new one of the same model. Reinstall the packing gland and tighten the nut to the specified torque. After reassembly, perform a pressure test with clean water to ensure no leakage. The leakage is completely eliminated, and the swivel operates normally—fault resolved.

Case 2: Swivel Rotates Unsmoothly with Abnormal Noise

Fault Phenomenon: When the swivel rotates, it feels stiff and unsmooth, accompanied by a harsh grinding noise. The noise becomes louder with the increase of rotation speed, and the swivel’s temperature rises rapidly, indicating excessive friction.

Cause Analysis: Disassemble the swivel and check the bearings—found that the Bearing (GB297-84 2007140) is severely worn and lacks lubrication. The bearing rollers are pitted, and the inner ring is corroded due to contamination by drilling fluid (caused by a damaged Oil Seal D7-1-67 220x260x18). The lack of lubrication and contamination have led to excessive friction and abnormal noise.

Solution: Replace the worn Bearing (GB297-84 2007140) and the damaged Oil Seal (D7-1-67 220x260x18) with new parts. Clean the bearing seat thoroughly with diesel oil to remove contamination, then apply a sufficient amount of high-temperature, anti-corrosion grease to the new bearing. Reassemble the swivel, ensuring all components are installed correctly. After reassembly, rotate the swivel manually—it operates smoothly without noise, and the temperature remains normal during test operation. The fault is fully resolved.

Case 3: Pneumatic Motor Fails to Work, No Torque Transmission

Fault Phenomenon: The Pneumatic Motor and Drive System (104.07.06.00) fails to start, and the swivel cannot transmit torque to the drill string. The drill bit stops rotating, forcing drilling operations to stop. The air supply to the motor is normal, but there is no response when the motor is activated.

Cause Analysis: Inspect the Pneumatic Motor (FMS-20) and related components—found that the Snap Ring (GB893.1-87 75) inside the motor is broken, causing the motor’s rotor to be stuck. Additionally, the Bearing (8118) in the drive system is worn, further preventing the motor from rotating. The snap ring broke due to fatigue after prolonged use, and the bearing wear is caused by insufficient lubrication.

Solution: Disassemble the Pneumatic Motor (FMS-20), replace the broken Snap Ring (GB893.1-87 75) and worn Bearing (8118) with new parts. Apply lubricating oil to the motor’s rotor and drive system components. Check the air supply pipeline for blockage, and ensure the O-rings (D4-4-66 16x2.4) in the motor are intact. Reassemble the motor and drive system, then test it— the motor starts normally, and the swivel transmits torque smoothly. Drilling operations resume, and the fault is resolved. We also scheduled weekly lubrication of the motor and drive system to prevent recurrence.

FAQ (Frequently Asked Questions)

Parts List Reference

The following is the complete parts list of the Lanzhou LS Swivel SL225-3. This list is the core reference for procurement, parts replacement, and maintenance—all parts are fully compatible with the swivel and meet national (GB series) and industry standards. When purchasing or replacing parts, please refer to the model, specification, and standard of each part to ensure compatibility, reliability, and safety.

Procurement Guidance

Purchasing high-quality, compatible parts is critical to maintaining the reliable operation of the Lanzhou LS Swivel SL225-3 and ensuring the safety and efficiency of drilling operations. To help you avoid costly mismatches and ensure a smooth procurement process, we provide the following practical guidance:

First, strictly refer to the parts list in this document. For each part, confirm its model (e.g., Swivel 104-18.00, Packing Assembly 104.05.30.00), specification (e.g., Plug 104.05.02 2", O-ring D4-4-66 120x5.7), and applicable standard (e.g., Stud GB898-88 AGM24-M24x65). This ensures the parts you purchase are fully compatible with the Lanzhou LS Swivel SL225-3.

Second, prioritize original parts or certified replacements. Original parts are designed and tested specifically for the Lanzhou LS Swivel SL225-3, ensuring the highest quality, reliability, and compatibility. They are manufactured to meet the swivel’s strict technical requirements, reducing the risk of faults and extending service life. If original parts are unavailable, choose parts from reputable suppliers that meet the same GB/industry standards as the original, and ask for product certification to verify quality.

Third, communicate clearly with suppliers. Provide this document to your supplier to clarify your needs—this helps avoid misunderstandings and ensures they deliver the correct parts. For key components (e.g., Pneumatic Motor FMS-20, Bearing GB297-84 2007140, Packing Assembly 104.05.30.00), specify that the parts must be compatible with the Lanzhou LS Swivel SL225-3.

Fourth, inspect parts upon receipt. Check the model, specification, and condition of each part to ensure there are no damages, mismatches, or defects. This step helps resolve issues early and prevents delays in maintenance or drilling operations.

Investing in high-quality, compatible parts will minimize downtime, reduce maintenance costs, and extend the service life of your Lanzhou LS Swivel SL225-3. We are available to provide additional procurement advice or technical support to help you find the right parts for your needs, ensuring your drilling operations run smoothly and safely.

Conclusion

The Lanzhou LS Swivel SL225-3 is a critical component of oilfield drilling operations, and its reliable performance directly affects drilling efficiency, safety, and cost. This document provides comprehensive, practical guidance for all aspects of the swivel—from product overview and functional explanation to maintenance, fault resolution, and procurement—tailored specifically to the needs of users working with the Lanzhou LS Swivel SL225-3.

By following the maintenance guidelines, fault solutions, and procurement advice provided in this document, you can ensure the swivel operates stably, minimize equipment downtime, and maximize the efficiency of your drilling operations. Whether you are an on-site maintenance engineer, procurement manager, or technical supervisor, this document will serve as a valuable, authoritative reference to address your daily needs.

If you have further questions about the Lanzhou LS Swivel SL225-3’s parts, maintenance, or procurement, consult a professional technical engineer with experience in this swivel model for targeted, personalized solutions.

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