16 February 2025

**Standard Safety Equipment for Onshore H2S Operations**

**H2S and Combustible Gas Monitors**
All personnel shall be informed of specific well site hazards linked to Hydrogen Sulphide (H2S) and trained in the correct use of personal safety equipment, H2S detectors, and warning systems.

### **Integrated Combustible Gas and H2S Detection System**
A detection system with separate visual and audible alarms shall be installed at all well sites with known or suspected H2S hazards. It shall have a continuous power supply and an emergency battery backup for at least 60 minutes.

A structured preventive maintenance (PM) and testing program shall ensure continuous calibration and operation. The program shall include:
- Servicing and calibration by authorized personnel.
- Prequalification of gas detection system providers.
- Calibration after rig moves and monthly testing.
- Weekly inspections of splash guards and protective housings.
- Post-severe weather inspections and recalibrations.
- Manufacturer-provided calibration procedures followed during monthly calibrations.

### **Sensor Placement**
H2S and Combustible Gas sensors shall be positioned near:
- **Bell nipple** – H2S & Combustible Gas detection.
- **Flow line opening to shale shaker** – H2S & Combustible Gas detection.
- **Driller’s position** – H2S detection (18-24 inches above the floor).
- **Cellar/BOP stack/well testing equipment** – Moveable sensor for H2S & Combustible Gas detection.

### **Remote H2S Detection Devices**
- If the rig camp is within the 30 ppm H2S exposure risk area, the alarm system shall be connected to the camp alarms.
- Two detection stations shall be positioned on the camp perimeter closest to the rig, with sensors placed no more than 24 inches above ground level.
- One sensor shall be positioned at the muster station.
- One sensor shall be placed outside the security post.

The H2S alarm system shall include:
- **Amber strobe lights and audible alarms** for a **Warning High alarm** at 10 ppm.
- **Visual and audible alarms** for a **Critical High alarm** at 20 ppm.
- Alarms shall be positioned for visibility and audibility in all work areas.

### **Monitoring Locations**
- **Rig Site:** One monitor in the doghouse and another in the Supervisor/Toolpusher’s office.
- **Main Camp:** Two monitors in 24-hour manned areas.
- **Spare Sensors:** At least two spare H2S sensors shall be maintained.

### **Combustible Gas Detection and Alarm System**
All well sites shall have a continuous combustible gas monitoring and alarm system with at least two detection devices connected to:
- **Warning High alarm** (Red Strobe).
- **Critical High alarm** (visual and audible).

Ensuring these safety measures will help mitigate H2S exposure risks and improve on-site safety.

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Видео 16 February 2025 канала Rajeev Kunchan