1. Core Application & Target User Demand
This guide focuses on rotary tables (ZP-375, ZP275) and their full range of accessories, including API-7K compliant ZP-375 rotary tables, bushings, reducers, shafts, bearings, and fasteners (e.g., Hex bolt M20X60, Bearing 5692/800). Tailored for oil and gas drilling contractors, drilling rig operators, and maintenance teams, these components meet the demand for high-torque, wear-resistant, and reliable rotary system operation—critical for driving drill strings, maintaining wellbore alignment, and ensuring continuous drilling efficiency in harsh downhole conditions.
2. Product Introduction
The rotary table assembly (ZP-375, ZP275) and matching accessories form the backbone of drilling rig rotary systems, fully compliant with API-7K, GB/T, and JB standards. Key components include the rotary table body, bull gear (Z81), pinion (Z22), cardan shaft, chain reducer, various bushings (roller, master, split), elevator links, and precision fasteners. All parts are engineered for seamless compatibility, with materials and dimensions optimized to withstand extreme torque, vibration, and corrosion—ensuring long service life and reducing unplanned downtime.
3. Functional Description
These components work synergistically to transmit power from the rig’s drive system to the drill string, enabling stable rotation at adjustable speeds. The ZP-375/ZP275 rotary table provides precise torque control for drilling, reaming, and casing operations; bushings (e.g., Roller Bushing for hex. Kelly 5 1/4") ensure centering and load distribution; the chain reducer and cardan shaft optimize power transmission efficiency; and fasteners (bolts, spring washers) and bearings (e.g., Aligned roller bearing 22330C) maintain structural integrity under dynamic loads. The system also supports quick accessory replacement to adapt to different drill string sizes and drilling tasks.
4. Structural Features
The rotary table body (e.g., Z16140400001AA) adopts a forged steel structure with heat treatment for high tensile strength and impact resistance. The bull gear and pinion feature precision gear cutting and carburizing treatment to minimize wear and noise during high-torque operation. Bushings are designed with split or integral structures for easy installation and replacement, while bearings (cylindrical, aligned roller) use high-grade bearing steel with lubrication grooves to enhance heat dissipation. All components follow modular design principles, ensuring compatibility between ZP-375/ZP275 models and simplifying maintenance.
5. Applicable Working Conditions
Suitable for onshore and offshore oil and gas drilling, as well as geothermal drilling, these components excel in harsh environments with high temperature (up to 120°C), high humidity, and heavy dust. They are compatible with medium to deep well drilling (depth up to 5000m) and can handle drill string weights up to 450 tons. The system adapts to various drilling fluids (water-based, oil-based) and withstands continuous vibration and cyclic torque loads, meeting the requirements of API-7K Class 2 drilling rigs.
6. Maintenance & Care Recommendations
To extend service life and prevent failures, follow these guidelines: Conduct daily inspections of fastener tightness (per torque specifications for M12, M16, M20 bolts) and bearing lubrication levels using the oil stick (P1200249AA). Replace lubricating oil every 200 operating hours, using ISO VG 460 gear oil for reducers and bearings. Inspect bushings monthly for wear (replace if clearance exceeds 0.5mm) and clean drilling fluid residues from sealing rings (e.g., O ring 420X7) to avoid leakage. Conduct quarterly non-destructive testing (NDT) of gears and shafts to detect fatigue cracks. Store spare parts in a dry, dust-free environment with anti-corrosion coating to prevent rust.
Rotary table and accessories
1 set Rotary table conform to API - 7K, ZP-375 |
1 set ZP-375 Rotary table Accessories |
- Roller Bushing for hex. Kelly(5 1/4") |
- Master Bushing |
- Split Bushing 2 3/8"-8 5/8" |
- Split Bushing 9-5/8"-10-3/4" |
- Split Bushing 11-3/4"-13-3/8" |
- Elevator Links for Bushing |
- Bit Breaker |
1 set Chain Reducer |
1 set Cardan Shaft |
1 ea YZ08 |
Z16140000004AA | ZP275 rotary table assembly |
Z16140000006AA | Base |
Z16140300001AA | Upper cover |
Z16140400001AA | Rotary table body |
P3200008AA | Bull gear Z81 |
4319120060 | Hex bolt M20X60 |
4313000020 | Spring washer 20 |
4500300019 | Bearing 5692/800 |
Z16140100004AA | External square bushing |
P1000229AA | Adjusting shim |
P3200007AA | Pinion Z22 |
4300812030 | Bolt M12X30 |
4313000012 | Spring washer 12 |
P1100422AA | Gland, bearing |
5300100612 | O ring 420X7 |
4500100338 | Aligned roller bearing 22330C |
4500100339 | Cylindrical roller bearing NU2330 |
4300820065 | Bolt M20X65 |
4300816060 | Bolt M16X60 |
4313100016 | Spring washer 16 |
P1400189AA | End cover, small bearing |
P1500028AA | Flange |
P5400074AA | Key |
P1400188AA | Shaft sleeve |
5300200031 | Sealing ring B180X210X16 |
P1000228AA | Adjusting shim |
P1000227AA | Adjusting shim |
4300816040 | Bolt M16X40 |
P0100140AA | Gland |
P2400181AA | Pinion shaft |
Z16140600002AA | Arrester |
P1200248AA | Oil draining plug |
P1100421AA | Bearing box |
P5400072AA | Key |
Z16140800001AA | Screw plug |
Z16140900001AA | Oil stick |
P1200249AA | Screw plug |
4500300016 | Bearing 591/800 |
P0100143AA | Retaining plate |
5300100750 | O ring 800X8.6 |
P1000230AA | Adjusting shim |
P0100142AA | End cover, lower bearing |
5300100780 | O ring 1010X8.6 |
P1100423AA | Sealing sleeve |
4300712045 | Bolt M12X45 |
4313200024 | Flat washer 24 |
4319124080 | Allen bolt M24X80 |
22226C/W33 | C-M60x2 |
HG4-692-67 PG150X180X16 | T404-05004 |
GB/T283-64 NU1028 | T403-003 |
GB276-94 6028 | YN-60(0-l. 6MPa) |
GB/T288-94 22228C/W33 | BSCYG9010-1.0 |
BHJ390F-650 | LWBZ-40 |
GB3452. 1-82 122x3. 55 | TF-160X180L |
GB3452.1-82 132x3. 55 | DP-B63B |
GB/T3638 24S-4-232 | GB1235 11x1. 9 |
BA505301-0400 | GB1235 30X3. 1 |
AZ502106-0111 | GB1235 40X3. 1 |
T403-002 | JB982-77 48 |
7. On-Site Fault Maintenance Cases
Case 1: Rotary Table Jamming
A drilling rig using ZP-375 rotary table reported jamming during operation. Inspection found the Aligned roller bearing 22330C was seized due to insufficient lubrication and drilling fluid intrusion. After replacing the bearing, flushing the lubrication system, and installing a new sealing ring (B180X210X16), the rotary table resumed normal operation, with no recurrence in 8 months.
Case 2: Gear Noise & Wear
Abnormal noise from the ZP275 rotary table was traced to excessive wear on the bull gear (Z81) and pinion (Z22), caused by misalignment and poor lubrication. The gears were replaced, the shaft alignment was adjusted using adjusting shims (P3200007AA), and high-pressure lubrication was implemented. The system operated smoothly with reduced noise and extended gear life.
Case 3: Bushing Failure
A split bushing (9-5/8"-10-3/4") failed prematurely, leading to drill string misalignment. Root cause was improper installation (uneven torque on fasteners) and debris accumulation. The bushing was replaced, the installation torque was calibrated per API-7K, and a debris shield was added. Bushing service life increased by 60%.
Case 4: Fastener Loosening & Oil Leakage
Oil leakage from the ZP-375 rotary table bearing box was caused by loose Hex bolt M20X60 and damaged O ring 800X8.6. The bolts were retightened to specified torque, the O ring was replaced, and spring washers 20 were inspected and replaced as needed. Leakage was resolved, and monthly torque checks were established to prevent recurrence.
8. FAQ
Question | Answer |
Are ZP-375 and ZP275 rotary table accessories interchangeable? | Most core accessories (e.g., bearings, standard fasteners) are interchangeable, but model-specific parts (rotary table body, bull gear) are not. Always verify part numbers (e.g., Z16140400001AA for ZP-375 body) to ensure compatibility, per manufacturer specifications. |
What lubrication standard should be followed for the chain reducer? | Use ISO VG 460 industrial gear oil, compliant with GB/T 3141-1994 viscosity classification. Change oil every 200 operating hours, or more frequently in high-temperature (above 80°C) or dusty environments, to prevent gear and bearing damage. |
How to determine if a split bushing needs replacement? | Replace split bushings if: 1) Inner diameter wear exceeds 0.5mm; 2) Surface cracks are detected via NDT; 3) Drill string misalignment occurs during rotation. Follow API-7K guidelines for inspection frequency (monthly for high-load operations). |
Can these components be used for offshore drilling? | Yes. All components are treated with anti-corrosion coatings (hot-dip galvanizing, epoxy painting) to resist saltwater corrosion, meeting offshore drilling requirements per ISO 12944-2. Regular anti-corrosion inspections (bi-monthly) are recommended for offshore use. |
What is the service life of the bull gear (Z81) under normal operation? | Under proper lubrication and maintenance (quarterly NDT, regular oil changes), the bull gear has a service life of 2,500-3,000 operating hours. Service life may decrease by 30-40% in harsh conditions (excessive torque, poor lubrication). |
9. Procurement Guide
All rotary tables (ZP-375, ZP275) and accessories fully comply with API-7K, GB/T, and JB standards, ensuring perfect compatibility with original drilling rig systems. Each component undergoes strict quality control, including material testing, precision machining inspection, and load-bearing validation, to deliver reliable performance and reduce maintenance costs. Choosing these high-quality parts safeguards drilling efficiency and on-site safety. Contact us to confirm part availability, verify compatibility with your rig model, and complete your procurement—backed by professional technical support to address installation and maintenance needs.
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