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Swivel — API 8C / PSL1 Rotary Swivel for Onshore & Offshore Drilling
API 8C / PSL1 Rotary Swivel for Onshore & Offshore Drilling
Product Introduction
The Rotary Swivel is categorized into two core series: normal duty swivels and double duty swivels, fully compliant with API Spec 8C and API PSL1 industrial standards. It is specially engineered for onshore and offshore petroleum drilling operations.
Standard swivels rely on an integrated gooseneck and washpipe cassette assembly to deliver drilling fluid through the central bore to drill strings while enabling unrestricted rotational movement of the drill stem during circulation. The split washpipe cassette structure allows rapid on-rig replacement of wear components without disassembling the gooseneck or rotary hose, drastically cutting maintenance downtime.
The advanced double-duty swivel (models XSL225 and XSL450) adds a built-in motor clutch assembly inside the housing: air motor power transfers via friction discs to drive pinions, which rotate a large gear mounted on the central pipe to spin the joint rotor independently, delivering auxiliary spinning functionality separate from main rig rotation.
Key Features
API Spec 8C & PSL1 Compliant: Full compliance with official API monogram, meeting global petroleum equipment export compliance requirements.
Split Modular Washpipe Cassette: Allows quick replacement of wearing parts on the rig without disassembling the gooseneck and rotary hose, drastically reducing maintenance hours and rig downtime.
Double-Duty Option: Equipped with a built-in air motor clutch. It can realize independent auxiliary rotation for pipe make-up and break-out, significantly lowering the load of the main drilling rig.
High-Strength Alloy Construction: Core components are made of high-strength alloy to withstand long-term heavy-load and high-pressure mud circulation. Every swivel passes strict factory pressure and running tests to eliminate leakage risks.
Rich Customization Options: Customizable 3LP / 4LP internal and external thread connections, optional low-temperature resistant configuration (down to -40°C) for frigid regions, and two gooseneck connection options (REG thread or union joint).
Technical Specifications
| Model | Max. Static Load (kN) | Max. Working Pressure (MPa) | Bore Size of Central Pipe (mm) | Weight (kg) |
|---|---|---|---|---|
| CH125 | 1,250 | 21 | Φ68 | 625 |
| SL170 | 1,700 | 21 | Φ70 | 1,250 |
| SL225 | 2,250 | 21 | Φ75 | 2,500 |
| SL450 | 4,500 | 35 | Φ75 | 2,900 |
Additional models including SL135, SL160, SL315, XSL225, and XSL450 are available upon request. Please contact us with your required static load and working pressure.
Interchangeable with Major Brands:
BOMCO, EMSCO, Gardner Denver, NOV, Oilwell, TSC, Ideco, Wirth, Drillmec, Weatherford
Our swivels are dimensionally and functionally compatible with major international brands, ensuring seamless replacement.
Product Structure
Swivel Main Housing: High-strength alloy integrated shell. Serves as the main support frame and provides installation space for the air motor clutch on double-duty models.
Central Pipe Assembly: Core flow channel for drilling mud, connecting gooseneck and drill string.
Master Bearing & Crosshead Assembly: Load-bearing rotary structure, bears the total weight of the drill string while allowing smooth rotary movement.
Washpipe Cassette Assembly: Modular sealing unit composed of washpipe, packing, and seal parts. Quick to disassemble and replace on site.
Gooseneck Assembly: Curved flow pipeline connected to rotary hose, available with REG thread or union joint connection, 15° fixed included angle.
Lower Box Thread Joint: Standard 6-5/8" REG-LH thread at the bottom, used to connect kelly and transmit load and mud flow.
Applications
Onshore Oil & Gas Drilling: Core circulation and rotation equipment for conventional vertical wells, handling high-pressure mud circulation.
Offshore Oil & Gas Exploitation: Applicable to platform drilling and workover operations, with heavy-load structural design for harsh marine working conditions.
Well Workover & Stimulation Service: Suitable for pulling, running, washing, and fracturing operations during well maintenance.
Horizontal & Directional Drilling: Stable rotary performance adapts to complex curved wellbore construction.
Cold Region & Geothermal Projects: Custom low-temperature versions support operations down to -40°C. Ideal for medium and deep geothermal well circulation.
Coalbed Methane & Shale Gas Development: Matches small to medium drilling rigs for unconventional energy extraction.
Quality Assurance & After-Sales
Quality & Testing
Standard: API Spec 8C / PSL1
Material: High-Strength Alloy Steel
Testing: Factory Pressure & Running Tests
Test Report: Provided
Video Inspection: Provided (on request)
After-Sales Service
Standard Warranty: 12 Months
Global Support: 24/7 Technical Assistance and Spare Parts Supply
Training: On-site or Remote Operation / Maintenance Training
Packaging & Delivery
| Packaging Details | Wooden Case / Pallet (Suitable for global shipping) |
| Shipping Port | Shanghai / Tianjin / Qingdao (Negotiable) |
| Delivery Time | 30-60 Days (Depends on model and quantity) |
| Payment Terms | T/T, Western Union, L/C |
Why Choose Petrolik?
API Spec 8C / PSL1 Certified: Full compliance with official API monogram for global market compliance.
Split Washpipe Cassette: Quick on-rig replacement of seals without disassembling the gooseneck or rotary hose.
Double-Duty Option: Built-in air motor clutch for independent auxiliary rotation, significantly reducing main rig load.
100% Documented Quality: We provide factory pressure and running test reports with every shipment. Video inspection is available.
Fast Technical & Quotation Response: Our engineering team responds to technical inquiries and provides detailed quotations within 24 business hours.
Frequently Asked Questions (FAQ)
Q1: Are your swivels fully API certified and interchangeable with mainstream brand OEM parts?
A: Yes. All swivels comply with API Spec 8C PSL1 standards and own official API monogram. Dimensions, threads, and load standards are consistent with BOMCO, NOV, EMSCO, and other international brands, supporting direct replacement without modification.
Q2: Why does mud leak from the swivel gooseneck frequently?
A: Mud leakage is mainly caused by worn washpipe, aging packing, or reversed installation of sealing components. Our split washpipe cassette allows quick on-rig replacement of seals without disassembling the whole swivel to solve leakage fast.
Q3: What is the difference between a normal swivel and a double-duty swivel?
A: A double-duty swivel adds a built-in air motor clutch assembly. It can independently rotate drill pipes for make-up and break-out to reduce main rig load, while a standard swivel only undertakes mud circulation and suspension functions.
Q4: Can you customize low-temperature resistant swivels for cold-region oilfields?
A: Custom low-temperature models are available. We adopt low-temperature sealing materials and special lubricating oil to ensure stable operation under minus 40°C frigid working environments.
Q5: What specifications of swivel should I choose for my drilling rig?
A: Swivel selection is based on the maximum static load and working pressure of your rig. Our models range from CH125 (1,250 kN) to SL450 (4,500 kN), with max working pressure up to 35 MPa, covering shallow, medium, and deep well demands.
Q6: What maintenance work needs to be done regularly during operation?
A: Check oil level and packing wear every trip; change lubricant every 200–700 working hours; add grease to seal components before drilling; test pressure before well startup to avoid hidden leakage risks.
Need a Quote for API 8C Rotary Swivels?
Send us your required model, static load, and working pressure. Our team will respond within 24 hours.
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