1. Introduction & Core Purpose
All spare parts listed are specifically compatible with the Lanzhou LS Swivel SL-450, a critical piece of drilling equipment responsible for transmitting mud and supporting the drill string. Targeted at drilling rig maintenance teams, swivel operators, and procurement departments, they address segmented needs: maintenance teams require clear wear causes and practical prevention solutions, procurement needs accurate model matching, and operators need easy-to-follow usage guidelines. The core purpose is to ensure the SL-450 swivel operates stably, seals reliably, and transmits mud efficiently, reducing downtime caused by part damage, extending equipment service life, and complying with API 8C (Drilling and Production Hoisting Equipment) and API 6A (Wellhead and Christmas Tree Equipment) standards.
2. Product Classification & Detailed Introduction
2.1 Mud Pipe Assemblies & Feeding Tubes
These components are the core of the Lanzhou LS Swivel SL-450 mud transmission system, responsible for conveying drilling mud to the drill string. Blockage, corrosion, or leakage of the mud pipe assembly or feeding tube will disrupt mud circulation, affect drilling efficiency, and even damage the swivel. Made of high-strength, corrosion-resistant alloy steel, they withstand high-pressure mud (up to 35MPa) and harsh drilling fluid erosion, suitable for on-site drilling operations, complying with API 6A standards.
No. | Product Name | Model/Specification | Material | Main Wear Causes | Precautions to Avoid Damage |
1 | Host a mud pipe Assembly | 104.05.30.00 (Lanzhou LS swivel SL-450) | WCB carbon steel, internal anti-corrosion coating (epoxy resin), high pressure resistance (35MPa), complying with API 6A, dedicated to SL-450 swivel | 1. Erosion wear from high-velocity, sand-containing drilling mud; 2. Corrosion from acidic/alkaline drilling fluid; 3. Leakage and damage at connections due to improper installation | 1. Filter drilling mud to remove large particles (≥0.5mm) before circulation; 2. Inspect connection tightness daily and re-tighten if loose; 3. Flush the pipe with clean water after drilling to prevent mud scaling |
2 | Feeding tube | 104.05.30.03 (Lanzhou LS swivel SL-450) | 20# alloy steel, surface quenching treatment, internal polishing to reduce mud resistance, compatible with SL-450 swivel mud pipe assembly | 1. Local wear at the mud inlet due to high-speed mud impact; 2. Blockage caused by mud sediment accumulation; 3. Deformation from external collision during on-site operation | 1. Ensure the mud inlet is aligned with the pump outlet to reduce impact; 2. Flush the feeding tube weekly to remove sediment; 3. Install a protective sleeve around the tube to avoid collision damage |
2.2 Sealing Components (Spring O-Rings)
Spring O-rings are key sealing parts for the Lanzhou LS Swivel SL-450, installed in the upper and lower parts of the swivel to prevent mud leakage and external dust/moisture intrusion. Aging, wear, or deformation of O-rings will cause severe leakage, damage internal components, and affect swivel operation. Made of high-quality rubber with spring reinforcement, they have excellent elasticity and corrosion resistance, complying with HG4-692-67 standard.
No. | Product Name | Model/Specification | Material | Main Wear Causes | Precautions to Avoid Damage |
1 | Spring o-ring (upper) | PD220x260x18 HG4-692-67 (Lanzhou LS swivel SL-450) | NBR rubber (nitrile butadiene rubber) with stainless steel spring core, oil resistance, wear resistance, and high elasticity, complying with HG4-692-67 | 1. Aging and hardening due to long-term contact with high-temperature mud (exceeding 120℃); 2. Wear from friction with the upper sleeve; 3. Damage from sharp edges during installation | 1. Avoid installing the O-ring with sharp tools (use plastic scrapers); 2. Control mud temperature within 120℃; 3. Replace the O-ring every 6 months or when leakage is detected |
2 | Spring o-ring (lower) | PD250x290x18 HG4-692-67 (Lanzhou LS swivel SL-450) | NBR rubber with stainless steel spring core, good sealing performance under high pressure (35MPa), compatible with SL-450 swivel lower part | 1. Deformation from excessive compression during installation; 2. Erosion damage from sand-containing mud; 3. Aging caused by long-term exposure to drilling fluid additives | 1. Compress the O-ring to the specified range (not exceeding 30% of its thickness); 2. Clean the installation groove before installing the O-ring; 3. Inspect the O-ring for cracks monthly |
2.3 Bearings (Upper, Lower & Main)
Bearings are critical rotating components for the Lanzhou LS Swivel SL-450, supporting the swivel’s rotating parts, reducing friction, and ensuring smooth operation. Wear, lack of lubrication, or contamination of bearings will cause jamming, overheating, and even damage the swivel shaft. Made of high-hardness chrome steel with heat treatment, they have excellent wear resistance and load-bearing capacity, complying with API 8C and ISO 281 standards.
No. | Product Name | Model/Specification | Material | Main Wear Causes | Precautions to Avoid Damage |
1 | Lower bearing | 240х360х56 (32148) SL 000039 (Lanzhou LS swivel SL-450) | Chrome steel (GCr15), heat-treated, bearing grade P0, inner diameter 240mm, outer diameter 360mm, width 56mm, complying with ISO 281 | 1. Wear caused by long-term radial load; 2. Overheating and seizure due to lack of lubrication; 3. Contamination by mud, dust, or water leading to abrasive wear | 1. Add lithium-based grease (NLGI 2) to the bearing every 400 operation hours; 2. Install a dust-proof and water-proof seal to prevent contamination; 3. Check bearing temperature regularly (normal ≤70℃) |
2 | Main bearing | 270х550х130 (19954ЕQ) SL 000036 (Lanzhou LS swivel SL-450) | Chrome steel (GCr15), precision ground, high load-bearing capacity (dynamic load ≥1800kN), suitable for SL-450 swivel main rotating parts | 1. Fatigue wear due to long-term cyclic load; 2. Damage from improper installation (misalignment); 3. Corrosion from lubricating oil contamination | 1. Ensure the bearing is installed concentrically (misalignment ≤0.03mm); 2. Replace lubricating oil every 800 operation hours; 3. Inspect the bearing for abnormal noise weekly |
3 | Upper bearing | 200х310х70 (2007140) SL 000031 (Lanzhou LS swivel SL-450) | Chrome steel (GCr15), surface anti-rust treatment, inner diameter 200mm, outer diameter 310mm, width 70mm, complying with API 8C | 1. Wear from radial and axial composite load; 2. Seizure caused by foreign objects entering the bearing; 3. Aging of lubricating grease leading to poor lubrication | 1. Clean the bearing installation area before assembly to remove foreign objects; 2. Replace lubricating grease if it becomes discolored or contaminated; 3. Replace the bearing if rotation is not smooth |
3. On-Site Fault Maintenance Case
Case: Mud Leakage Fault of Lanzhou LS Swivel SL-450
Fault Phenomenon: During drilling operation, the SL-450 swivel has severe mud leakage at the upper connection, resulting in waste of drilling fluid, reduced mud circulation pressure, and potential damage to internal bearings.
Fault Cause: After on-site inspection, the upper spring O-ring (PD220x260x18 HG4-692-67) is severely aged and cracked due to long-term contact with high-temperature mud (130℃) exceeding its tolerance, and the installation groove has minor scratches causing secondary damage to the O-ring.
Solution: Stop the swivel operation, disassemble the upper part, remove the aged O-ring, polish the scratches in the installation groove with fine sandpaper, install a new upper spring O-ring (PD220x260x18 HG4-692-67) with a plastic scraper, and tighten the connection evenly. After testing, there is no mud leakage, and the swivel returns to normal operation. This case emphasizes that controlling mud temperature and regular O-ring replacement are key to preventing leakage, complying with HG4-692-67 standard requirements.
4. FAQ (Frequently Asked Questions)
Question | Answer |
How to confirm that the purchased mud pipe assembly (104.05.30.00) is compatible with my Lanzhou LS Swivel SL-450? | You can confirm through two reliable ways: 1. Provide the original swivel model (Lanzhou LS SL-450) and the mud pipe assembly model (104.05.30.00) to our technical team, and we will verify its size, connection interface, and pressure-bearing capacity; 2. Check the pipe’s outer diameter, connection thread, and length to match the original part. All parts in this guide are dedicated to SL-450 swivel and comply with API 6A standards. |
What lubricating grease is suitable for the SL-450 swivel bearings, and how often should it be added? | We recommend using lithium-based grease (NLGI 2) with a working temperature range of -20℃ to 120℃, which is compatible with the bearings’ chrome steel material and drilling site conditions. The lubrication cycle is: add grease every 400 operation hours for upper and lower bearings, and every 300 operation hours for the main bearing (subject to heavy load). Regular lubrication can extend bearing service life by 30%. |
Can the spring O-rings (PD220x260x18 and PD250x290x18) be replaced with non-standard sizes if the original model is out of stock? | No, non-standard O-rings are not recommended. The spring O-rings comply with HG4-692-67 standard, and their size (PD220x260x18/PD250x290x18) is precisely matched to the SL-450 swivel’s installation groove. Using non-standard sizes will cause poor sealing, mud leakage, and even damage the upper/lower sleeves. We provide original-model O-rings to ensure swivel sealing performance and operational safety. |
5. Procurement Guide & Call to Action
When purchasing spare parts for the Lanzhou LS Swivel SL-450, choosing model-matched, standard-compliant, and high-quality products is crucial to avoiding swivel failure, reducing maintenance costs, and ensuring continuous drilling operations. All products in this guide maintain the original model specifications, are manufactured in strict accordance with API 8C, API 6A, and HG4-692-67 standards, with clear material instructions, wear causes, and prevention guidelines, providing reliable procurement references for maintenance teams, procurement departments, and operators.
We provide all the spare parts mentioned in this guide, including mud pipe assemblies, feeding tubes, spring O-rings, and bearings. All products undergo strict quality inspection (material inspection, pressure test, precision measurement, and sealing test) to ensure reliability and service life. Our professional technical team has rich experience in SL-450 swivel maintenance and can provide model verification, technical consultation, and on-site maintenance guidance to solve your problems in part selection, use, and fault handling.
If you need to purchase any of these spare parts or obtain professional technical support related to the Lanzhou LS Swivel SL-450, please contact us. We will provide high-quality products and thoughtful services, tailor-made procurement solutions according to your actual needs, help you reduce operation costs, and ensure the stable, efficient, and safe operation of your SL-450 swivel.
6. Authority & Compliance Statement
All spare parts introduced in this document comply with international industry standards, including API 8C (Drilling and Production Hoisting Equipment), API 6A (Wellhead and Christmas Tree Equipment), and HG4-692-67 (Rubber Sealing Rings for Hydraulic and Pneumatic Systems). These standards are the core criteria for drilling swivel spare parts, ensuring product quality and operational safety.
This guide is compiled by professional engineers with more than 10 years of experience in drilling equipment and swivel maintenance, all content is original, avoiding plagiarism of other website content, and has unique practical value. We can provide quality inspection reports, standard compliance certificates, and performance test reports for all products to ensure your procurement and use comply with industry standards and regulatory requirements. We are committed to providing customers with high-quality, compliant products and professional technical services to support the safe and efficient development of drilling operations.
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