Lanzhou LS Rotary Table ZP275-2

Core Purpose & Equipment Adaptation

All parts listed in this guide are exclusively designed, manufactured, and tested to be fully compatible with the Lanzhou LS Rotary Table ZP275-2—a critical rotating component widely used in onshore oil and gas drilling, coalbed methane development, and geothermal drilling projects. As a key part of the drilling rig, the Lanzhou LS ZP275-2 rotary table is mainly used to rotate the drill string, transmit drilling torque to the drill bit, and support the weight of the downhole drill string or casing string during tripping and casing operations. The core purpose of these matching parts (covering mechanical, sealing, and auxiliary components) is to ensure the stable, safe, and efficient operation of the ZP275-2 rotary table, which boasts a maximum static load of 4500kN and a maximum operating torque of 27459N·m, with a gear ratio of 3.67 and a maximum speed of 300r/min. We precisely address the segmented needs of three key user groups: Drilling operators rely on these parts’ reliable performance to avoid unplanned downtime and ensure on-site safety; maintenance technicians require practical guidance on wear prevention and fault troubleshooting to reduce labor costs and extend equipment service life; procurement personnel need clear compatibility specifications, quality benchmarks, and genuine product references to source compliant, high-performance parts. All ZP275-2 rotary table parts strictly adhere to API Spec 7K (American Petroleum Institute Standard for Drilling Hoisting and Rotating Equipment), API Spec 7-2 (Specification for Threading and Gauging of Rotary Shouldered Thread Connections), and relevant Chinese national standards (such as GB1152-89, GB5783-86), ensuring compliance with global safety, quality, and technical standards for oilfield equipment.

Product Introduction

The listed parts are dedicated to the Lanzhou LS Rotary Table ZP275-2, covering a comprehensive range of components that form the integrated rotary table system, including four key categories: Mechanical Transmission Components (ring gear with spiral/bevel teeth, pinion shaft assembly, lock pawl—left/right, crank pins, columnar pins), Sealing Components (O-rings, oil seals, packing), Auxiliary Components (grease fittings, drain plugs, washers, springs, shims, dipsticks), and Installation & Fixing Components (hex socket head screws, nuts, cotter pins, bearing supports, flanges, housings). Each part—from the ring gear (spiral teeth) and pinion shaft assembly to the smallest O-ring and cotter pin (5X36, 2X12)—is precision-manufactured to match the ZP275-2 rotary table’s exact dimensional and performance requirements, with corresponding part numbers (such as 105.10.00, 105.06.01, D4-5-73) for easy identification and procurement. These parts are engineered to withstand the harsh operating conditions of drilling sites, with high wear resistance, corrosion resistance, and fatigue resistance. The ZP275-2 rotary table’s core components (such as ring gears and bearings) are made of high-strength cast steel and alloy materials, while sealing parts adopt high-temperature, oil-resistant rubber to ensure durability in complex environments. Every genuine part undergoes strict quality control processes, including dimensional inspection, material composition testing, and assembly compatibility verification, ensuring reliability and perfect fit with the ZP275-2 rotary table.

Function Description

The Lanzhou LS ZP275-2 rotary table parts work in seamless coordination to deliver four core functions critical to drilling operations, all optimized for the ZP275-2 model’s structural design: First, Torque Transmission & Drill String Rotation: Mechanical components such as the ring gear (spiral/bevel teeth), pinion shaft assembly, and lock pawls transmit stable torque from the drilling rig’s power system to the drill string, driving the drill bit to break rock and form the wellbore. The gear pair (ring gear and pinion) with a 3.67 transmission ratio ensures efficient torque conversion, adapting to different drilling speeds and load requirements. Second, Sealing & Contamination Prevention: Sealing components (O-rings, oil seals, gaskets) prevent drilling mud, dust, and moisture from entering the internal structure of the rotary table, protecting bearings, gears, and other precision parts from wear and corrosion. Drain plugs (1") and oil dipsticks help maintain the cleanliness and proper level of lubricating oil, ensuring smooth operation of internal components. Third, Fixing & Positioning: Installation and fixing components (hex socket head screws, nuts, cotter pins, bearing supports) secure all parts in place, ensuring the rotary table’s structural stability during high-vibration drilling operations. Lock pawls (left/right) and their matching pins lock the rotary table when needed, preventing accidental rotation during drill bit replacement or maintenance. Fourth, Lubrication & Maintenance Assistance: Grease fittings, oil dipsticks, and washers facilitate regular lubrication and maintenance—grease fittings inject lubricating oil into key rotating parts (bearings, gears) to reduce friction, while oil dipsticks allow operators to check oil levels quickly, and washers/springs ensure tight sealing of oil circuits and fasteners.

Structural Features

The Lanzhou LS ZP275-2 rotary table parts feature a robust, integrated structural design optimized for harsh drilling environments, with four key characteristics that ensure reliability, durability, and ease of maintenance, consistent with the ZP275-2 rotary table’s overall structure: 1. Modular & Easy to Assemble/Disassemble: All parts are designed with modularity in mind—components such as lock pawls, pinion shaft assemblies, and bearings can be disassembled and replaced on-site without removing the entire rotary table, reducing maintenance time and labor costs. For example, the pinion shaft assembly can be quickly removed for inspection or replacement, minimizing downtime. 2. High-Strength Material Selection: Mechanical transmission components (ring gear, pinion shaft assembly, lock pawls) are made of high-strength cast steel and alloy materials (such as 40Cr, ZG35) with surface quenching and tempering treatment, enhancing hardness, wear resistance, and fatigue resistance to withstand the 4500kN maximum static load and 27459N·m maximum torque of the ZP275-2 rotary table. 3. Reliable Sealing System: The sealing structure adopts multi-layer protection—O-rings, oil seals, and gaskets are made of high-temperature, oil-resistant, and mud-resistant materials, perfectly fitting the ZP275-2’s internal gaps to prevent oil leakage and contamination. The rotary table’s turntable and cast-weld base adopt a labyrinth seal to further prevent mud intrusion, and the turntable’s lower edge is equipped with scrapers to automatically remove mud around the labyrinth ring during rotation. 4. Precision Matching & Stable Operation: All parts are precision-machined with strict dimensional tolerances, ensuring perfect matching with the ZP275-2 rotary table’s internal structure. For example, the ring gear (spiral/bevel teeth) and pinion shaft assembly have precise tooth profiles, ensuring smooth meshing, low noise, and stable torque transmission during high-speed rotation. Bearings and their supports are designed to bear the full load of the drill string, ensuring stable operation of the turntable.

Applicable Working Conditions

The Lanzhou LS ZP275-2 rotary table parts are specifically engineered to withstand the harsh, variable conditions of oil and gas drilling operations, perfectly matching the ZP275-2 rotary table’s operational scope and suitable for the following scenarios: 1. Onshore Drilling Operations: Compatible with ZP275-2 rotary tables used in onshore desert, mountainous, and coastal oilfields, resisting high temperature, low temperature, high humidity, and dust. In coastal areas, the parts’ anti-corrosion design (such as anti-rust coatings on steel components) effectively resists saltwater corrosion. 2. Medium-Depth to Deep Drilling: Suitable for drilling operations with depths ranging from 1500m to 6000m, where the rotary table needs to transmit stable torque and bear large loads—consistent with the ZP275-2’s maximum static load of 4500kN and maximum operating torque of 27459N·m. 3. High-Vibration & High-Impact Environments: The parts’ robust structural design and anti-loosening fasteners (cotter pins, hex socket head screws, lock nuts) effectively absorb vibration from drilling operations, preventing component loosening and failure. For example, cotter pins (5X36, 2X12) lock pins and screws in place, avoiding loosening caused by long-term vibration. 4. Continuous Operation Scenarios: Designed for 24/7 continuous drilling cycles, with durable components and easy maintenance to minimize downtime. The ZP275-2’s parts are wear-resistant and fatigue-resistant, adapting to long-term high-speed rotation (up to 300r/min). 5. Various Drilling Fluids Environments: Resistant to erosion and corrosion from different types of drilling fluids (water-based, oil-based mud), ensuring stable performance even when in long-term contact with drilling mud. It should be noted that all parts must be used within their rated parameters (load, speed, temperature) to avoid permanent damage and safety hazards, and must comply with API Spec 7K operational requirements.

Maintenance & Upkeep Recommendations

Proper routine maintenance is critical to extending the service life of Lanzhou LS ZP275-2 rotary table parts, reducing fault rates, and ensuring safe, efficient operation of the ZP275-2 rotary table. Below are practical, on-site-friendly maintenance guidelines, organized by frequency and tailored to the different types of parts, combined with the ZP275-2’s structural characteristics:
1. Daily Inspection (Before Each Shift): Check all sealing components (O-rings, oil seals) for oil leakage or damage; inspect drain plugs (1") for tightness to avoid lubricating oil leakage; check the oil level with the oil dipstick and add lubricating oil if necessary (complying with the ZP275-2’s lubrication requirements); inspect lock pawls (left/right) and their matching pins for tightness and flexibility, ensuring they can lock the rotary table effectively; check grease fittings for blockages, ensuring lubricating oil can be injected smoothly.
2. Weekly Maintenance: Inject lubricating grease into all grease fittings to ensure key rotating parts (bearings, ring gears, pinion shafts) are fully lubricated; clean the surface of the rotary table and parts to remove mud, dust, and other contaminants; inspect washers and springs for deformation or damage, replacing them if necessary; check the tightness of hex socket head screws and nuts, tightening them to the standard torque if loose.
3. Monthly Maintenance: Inspect mechanical transmission components (ring gear, pinion shaft assembly, lock pawls) for wear—check the ring gear’s teeth for wear or damage, and the pinion shaft for bending or deformation; inspect sealing components (O-rings, oil seals) for aging, hardening, or cracks, replacing them as consumable parts; clean the drain plugs and oil circuit to ensure smooth oil drainage; check the bearing supports for looseness, adjusting and tightening them if necessary.
4. Quarterly Maintenance: Conduct non-destructive testing (magnetic particle testing) on key mechanical components (ring gear, pinion shaft assembly, lock pawls) to detect hidden fatigue cracks; replace all aging or worn parts (such as cotter pins, shims, and O-rings); flush the rotary table’s lubricating system and replace lubricating oil to ensure oil cleanliness; inspect the labyrinth seal and scrapers for damage, replacing them if they fail to prevent mud intrusion.
5. Annual Maintenance: Disassemble and inspect key components (pinion shaft assembly, bearings, ring gear) for wear and damage, replacing worn gears or bearings; calibrate the matching accuracy of the ring gear and pinion shaft assembly to ensure smooth meshing; conduct a full load test to ensure all parts meet the ZP275-2 rotary table’s performance requirements and API Spec 7K standards; paint anti-rust coatings on steel components to enhance corrosion resistance, especially for parts used in coastal or humid environments.

Rotary table parts name:

Rotary table parts no.:

On-Site Fault Maintenance Cases

Below are 4 real, short on-site fault cases encountered by drilling teams using Lanzhou LS ZP275-2 rotary tables, along with root causes and practical solutions—these cases reflect common issues and provide actionable guidance for maintenance technicians, aligned with on-site operational realities and the ZP275-2’s structural characteristics:

Case 1: Oil Leakage from Rotary Table & Bearing Wear

Fault Phenomenon: During drilling operations, lubricating oil leaked from the Lanzhou LS ZP275-2 rotary table, and the turntable rotated with abnormal noise; upon inspection, the bearing showed severe wear. On-Site Inspection: The O-ring (part no. 105.06.50.12) at the bearing support was aged and cracked; the lubricating oil level was too low, and the oil contained mud contaminants; the bearing (part no. 91682/800) was worn due to insufficient lubrication. Root Cause: The O-ring was not replaced regularly and aged under long-term high temperature and oil erosion; the lubricating oil was not replaced on schedule, and mud entered the oil circuit through the damaged O-ring, causing bearing wear. Solution: Replace the aged O-ring and worn bearing with genuine ZP275-2 parts; flush the lubricating system to remove contaminants; add new lubricating oil that meets the ZP275-2’s requirements; tighten the drain plug (1") and check for oil leakage. After maintenance, the oil leakage stopped, and the turntable rotated smoothly without abnormal noise.

Case 2: Lock Pawl Jamming & Rotary Table Lock Failure

Fault Phenomenon: When the drilling team tried to lock the ZP275-2 rotary table for drill bit replacement, the left lock pawl jammed and could not engage with the turntable, resulting in lock failure. On-Site Inspection: The pin (handle lock pawl, part no. 105.06.03-1) was bent; the lock pawl was contaminated with mud and lacked lubrication; the shim at the lock pawl was deformed. Root Cause: The pin was bent due to accidental impact during maintenance; mud accumulated on the lock pawl and was not cleaned in time, causing jamming; the shim deformed due to long-term stress, affecting the lock pawl’s movement. Solution: Replace the bent pin and deformed shim with genuine parts; clean the lock pawl (left) and apply lubricating grease; adjust the position of the lock pawl to ensure flexible engagement with the turntable. After treatment, the lock pawl worked normally, and the rotary table could be locked securely.

Case 3: Abnormal Noise from Gear Meshing & Tooth Wear

Fault Phenomenon: The ZP275-2 rotary table produced loud abnormal noise during operation, and torque transmission was unstable; the drilling speed fluctuated. On-Site Inspection: The ring gear (spiral teeth, part no. 105.06.33) had worn teeth; the pinion shaft assembly (part no. 105.06.50.00) had uneven tooth wear; the meshing gap between the ring gear and pinion was too large. Root Cause: The ring gear and pinion shaft assembly were not lubricated regularly, leading to increased friction and tooth wear; the shim used to adjust the meshing gap was lost, resulting in excessive gap and unstable meshing. Solution: Replace the worn ring gear and pinion shaft assembly with genuine ZP275-2 parts; install a new shim to adjust the meshing gap to the standard range (complying with API Spec 7-2 requirements); inject sufficient lubricating grease into the gear pair. After maintenance, the abnormal noise disappeared, and torque transmission became stable, with consistent drilling speed.

Case 4: Cotter Pin Breakage & Screw Loosening

Fault Phenomenon: During high-vibration drilling operations, the hex socket head screw (part no. GB70-85 M24X75) on the bearing support of the ZP275-2 rotary table loosened, and the cotter pin (5X36, part no. 105.06.14) broke. On-Site Inspection: The cotter pin was made of inferior material (not genuine) and had insufficient strength; the screw was not tightened to the standard torque, and the cotter pin could not lock it effectively; the cotter pin was corroded by drilling mud. Root Cause: Non-genuine cotter pins were used, which did not meet the ZP275-2’s strength requirements; the screw was not tightened properly during maintenance, and the cotter pin was not inspected and replaced regularly. Solution: Replace the broken cotter pin and loose screw with genuine ZP275-2 parts (cotter pin 5X36 and screw GB70-85 M24X75); tighten the screw to the standard torque and lock it with the cotter pin; clean the connection part and apply anti-rust grease to prevent corrosion. After replacement and inspection, the screw remained tight, and no further loosening occurred during subsequent operations.

FAQ (Frequently Asked Questions)

Procurement Guide

All listed parts are exclusively engineered for the Lanzhou LS Rotary Table ZP275-2, strictly adhering to API Spec 7K, API Spec 7-2, and relevant Chinese national standards (GB1152-89, GB5783-86)—ensuring reliable performance, perfect compatibility, and maximum safety in harsh oilfield environments, while matching the ZP275-2’s maximum static load of 4500kN and maximum operating torque of 27459N·m. Whether you need to purchase mechanical transmission components (ring gear, pinion shaft assembly, lock pawls), sealing components (O-rings, oil seals), auxiliary components (grease fittings, drain plugs, shims), or installation & fixing components (screws, nuts, cotter pins), we provide 100% genuine ZP275-2 parts that undergo rigorous quality testing (dimensional inspection, material testing, assembly compatibility testing) before leaving the factory. Our offering goes beyond product supply: we provide detailed technical support, including on-site fault troubleshooting guidance, maintenance training tailored to the ZP275-2’s structure, and component compatibility verification (via part numbers such as 105.10.00, 105.06.01), helping you reduce maintenance costs, minimize downtime, and ensure the safe, efficient operation of your Lanzhou LS ZP275-2 rotary table. Choosing genuine parts eliminates the safety risks of non-genuine, mismatched components and extends the overall service life of your rotary table—protecting your investment and on-site personnel. Contact us today to discuss your procurement needs, obtain accurate product specifications and part number verification, and access professional technical support—we are committed to providing you with high-quality products and reliable service to support your drilling operations.

contact us ：

Emeil: [email protected]   whatsapp: +86 15275658619

Should you have any purchase intentions, please contact us – we will offer you our most favorable price.