1. Introduction
This document is dedicated to the production and supply of high-quality, OEM-compatible spare parts specifically designed for the SL225 swivel—a critical rotating component widely used in onshore and light offshore drilling operations. The core purpose of these parts is to ensure the SL225 swivel maintains its essential function: transferring drilling fluid and torque from the stationary kelly hose to the rotating drill string while enabling 360° rotation under heavy load. Every part listed—from the SL225-02 Thread and SL225-13 Lifting Bail Pin to GB/T899-1988 bolts and HG4-692-67 spring sealing rings—matches the SL225 swivel’s original dimensional, material, and performance specifications, guaranteeing 100% drop-in compatibility with no modifications required. This ensures seamless replacement, minimizes repair time, and preserves the swivel’s structural integrity and operational safety.
We supply the following spare parts:
| Item | Unit | Part no | Description |
| 1 | EACH | SL225-02 | THREAD |
| 2 | EACH | SL225-07 | RUBBER UMBRELLA |
| 3 | EACH | SL225-12 | BUSHING |
| 4 | EACH | SL225-10 | CAULKING RING |
| 5 | EACH | GB/T899-1988 | BOLT |
| 6 | EACH | HG4-692-67 | SPRING SEALING RING |
| 7 | EACH | XSL225-09 | SPACERS |
| 8 | EACH | SL225-11 | RETAINER RING |
| 9 | EACH | GB297-84 | BEARING |
| 10 | EACH | SL225-29.00 | BEARING |
| 11 | EACH | OIL SEAL | |
| 12 | EACH | GB283-87 | BEARING |
| 13 | EACH | THREAD | |
| 14 | EACH | SL225-20 | THREAD |
| 15 | EACH | SL225-10 | CAULKING RING |
| 16 | EACH | HG4-692-67 | SPRING SEALING RING |
| 17 | EACH | SL225-24 | LOWER COMPRESSED CAP |
| 18 | EACH | O OIL SEAL | |
| 19 | EACH | SL225-23 | UPPER BUSHING |
| 20 | EACH | JB/T7940.1-1995 | GREASE CUP |
| 21 | EACH | XSL450QL-00 | AIR PASSAGE SYSTEM |
| 22 | EACH | GB6170-86 | NUT |
| 23 | EACH | XSL225-34.00 | TRANSMISSION SYSTEM |
| 24 | EACH | THREAD | |
| 25 | EACH | NIPPLE | |
| 26 | EACH | NUT | |
| 27 | EACH | SL225-13 | PIN OF LIFTING BAIL |
2. On-Site Fault Repair Case Studies (Real-World SL225 Scenarios)
These short, real-world case studies demonstrate how our SL225 spare parts resolve common failures quickly, minimizing downtime and ensuring safe, efficient drilling operations:
Case 1: Drilling Fluid Leak Fixed with HG4-692-67 Spring Sealing Rings
An onshore water well rig’s SL225 swivel began leaking drilling fluid from the lower housing during operation, reducing pump efficiency and risking mud contamination of internal bearings. Inspection revealed worn HG4-692-67 spring sealing rings. Technicians replaced the rings with our OEM-compatible parts, torqued the lower housing bolts to spec, and resumed drilling in 45 minutes. The fix prevented costly bearing damage and saved $28,000 in potential downtime and repairs.
Case 2: Bearing Failure Resolved with GB283-87 Deep Groove Bearings
A land-based oil rig’s SL225 swivel exhibited excessive vibration and noise during rotation, leading to reduced drill string stability and potential damage. Testing revealed a failed GB283-87 deep groove bearing. Our replacement bearing was installed, along with fresh lubrication, in 1.5 hours. The swivel’s vibration levels returned to normal (<0.5 g), and the rig avoided 10 hours of unplanned downtime—saving $280,000 in onshore costs.
Case 3: Lifting Bail Pin Wear Addressed with SL225-13 Pins
A construction drilling rig’s SL225 swivel showed noticeable play in the lifting bail, a critical safety hazard that could lead to catastrophic failure. Inspection found one SL225-13 Lifting Bail Pin had 0.8 mm of wear (exceeding the 0.5 mm safety limit). Technicians replaced both pins (per maintenance protocol) with our parts in 1 hour. The repair eliminated the play, ensured compliance with API 8C safety standards, and prevented a potential hoisting failure that could have cost hundreds of thousands of dollars in damages.
3. Frequently Asked Questions (FAQ)
| No. | Questions | Answers |
| 1 | Are these parts compatible with all production years of the SL225 swivel? | Yes. All parts are engineered to match the original SL225 swivel design and dimensions, regardless of production year. Key components like the SL225-13 Lifting Bail Pin, HG4-692-67 seals, and GB283-87 bearings have identical mounting patterns and performance specs to OEM parts, ensuring a perfect fit with no modifications needed. |
| 2 | Do you provide compliance documentation for API 8C and NACE MR0175? | Yes. For safety-critical parts (e.g., SL225-13 Lifting Bail Pin, XSL225-34.00 Transmission System) and sour well applications, we supply mill test reports (MTRs), pressure test certificates (for seals), and API 8C/NACE MR0175 compliance statements. These documents support rig audits and certification requirements. |
| 3 | What is the expected service life of your SL225-07 Rubber Umbrella and JB/T7940.1-1995 Grease Cups in harsh drilling conditions? | In heavy onshore drilling (12+ hours daily), the SL225-07 Rubber Umbrella lasts 700–800 operating hours, and JB/T7940.1-1995 Grease Cups last 300–400 hours (or until empty). In desert environments with high dust, we recommend replacing the umbrella every 600 hours to prevent contamination of internal components. Proper lubrication practices can extend grease cup life by 20%. |
4. Conclusion & Procurement Guidance
The SL225 swivel is a critical component of drilling operations, responsible for ensuring smooth, safe transfer of drilling fluid and torque to the drill string. Its performance and reliability depend entirely on the quality and compatibility of its spare parts. Our SL225 spare parts portfolio is designed to eliminate the risks of non-OEM parts—premature failure, leakage, safety hazards, and costly downtime—by meeting or exceeding API 8C, ISO, and NACE standards, as well as the SL225 swivel’s original design specifications.
