2. Index
1. Rig site Reference Materials (Standards)
2. Respiratory Protection Equipment
3. AIR PURITY STANDARDS
4. Rig H2S Monitor and Alarm System
5. Combustible Gas Monitor and Alarm System
4. Rig site Reference Materials (Standards)
• IADC Drilling Manual
• IADC Accident Prevention
• API SPEC 4A Steel Derricks
• API SPEC 4E Drilling and Well Servicing Structures
• API BULL 5C2 Performance Properties of Casing, Tubing, and Drill Pipe
• API BULL 5C4 Round Thread Casing Joint Strength With Combined Internal
Pressure and Bending
• API SPEC 6A Wellhead Equipment
• API SPEC 7 Rotary Drilling Equipment
5. Rig site Reference Materials (Standards)
• API SPEC 7 B-11C Internal Combustion Reciprocating Engines For Oil Field Service
• API RP 7G Drill Stem Design And Operating Limits
• API RP 7H Drilling Machinery
• API SPEC 8 Drilling and Production Hoisting Equipment
• API RP 8B Hoisting Tool Inspection and Maintenance Procedures
• API SPEC 9A Wire Rope
• API RP 9B Application, Care and Use of Wire Rope For Oil Fields
• API SPEC 13A Oil Well Drilling Fluid Materials
• API BULL 13C Drilling Fluid Processing Equipment
6. Rig site Reference Materials (Standards)
• API RP 49 Recommended Practice for Drilling and Well Servicing Operations involving Hydrogen
Sulfide
• API RP 52 Recommended Land Drilling Operating Practices for Protection of the Environment
• API RP 54 Recommended Practices for Occupational Safety and Health for Oil and Gas Drilling and
Servicing Operation
• API RP 500 Recommended Practice for Classification of Location for Electrical Installation at
Petroleum Facilities.
• API 510 Pressure Vessel Inspection Code
• API RP 2020 Safe Practices in Drilling Operations
• ANSI Z88.2 American National Standard Practices for Respiratory Protection
7. Rig site Reference Materials (Standards)
• ANSI Z89.1 Protective Head ware for Industrial Workers - Requirements
• ANSI Z41.83 Protective Footwear
• ANSI NFPA-70 Grounding Separately Derived Alternating-Current Systems
• NACE MR0175 Metals for Sulfide Stress Cracking and Stress Corrosion Cracking
Resistance in Sour Oilfield Environments
• UEP Work Permit System
• UEP Leak and Spill Reporting - Arabian Gulf
• UEP Inland Oil Spill Contingency Plan
• UEP Isolation, Lockout and Use of Hold Tags
8. Rig site Reference Materials (Standards)
• UEP Control of Remote Area Travel and Search/Rescue Procedures
• UEP Lifting Procedure
• UEP Isolation Barriers for Wells During Drilling & Workover Operations (With
and Without Rig) Rig & Equipment Operations and Maintenance Manuals for the Drilling Rig
Manufacturers and Other Major Equipment Items
• NEQS Noise Control
• NFPA Portable, Mobile and Special Fixed Firefighting Equipment
• UEP Onshore Wellsite Safety
• UEP Safety Identification and Safety Colors Coding
9. Rig site Reference Materials (Standards)
• UEP Electrical Area Classification
• UEP Emergency Eyewashes and Showers
• NEQS Combustible Gas and Hydrogen Sulfide in Air Detection Systems
• UEP Grounding
• Abbreviations: ANSI American National Standards Institute. API American
Petroleum Institute. NACE National Association of Corrosion Engineers. NEC
National Electrical Code NFPA National Fire Protection Association. NEQS
National environmental quality standards.
10. WORK SMART
• Your Personal Protective Equipment (PPE) is your final protection against
accidents and injuries. Your special skills and safety attitude is your primary
protection against accidents and injuries.
11. Respiratory Protection Equipment
• Such respiratory protection equipment shall be readily available (SCBA and/or
SABA), maintained in good working order, in a sanitary condition, and inspected
every 30 days (and/or as per contractor procedure)
Conditions
• (a) O2<20 %
• (b) Where the atmosphere is contaminated or in danger of being contaminated by
any airborne substance that may be considered to be harmful.
• Proper cleaning and sanitizing of the equipment after it is worn and used.
12. Respiratory Protection Equipment
• Such respiratory protection equipment shall be readily available (SCBA and/or
SABA), maintained in good working order, in a sanitary condition, and inspected
every 30 days (and/or as per contractor procedure)
Conditions
• (a) O2<20 %
• (b) Where the atmosphere is contaminated or in danger of being contaminated by
any airborne substance that may be considered to be harmful.
• Proper cleaning and sanitizing of the equipment after it is worn and used.
13. AIR PURITY STANDARDS
• Compressed Gas Association. The following chart provides the maximum allowable contaminant allowed under the C.G.A. standard.
• COMPONENT C.G.A. STANDARD
• Oxygen % by volume 19 - 23%
• Carbon Dioxide, by 0.10% max.
• Volume (1000 ppm)
• Carbon Monoxide 10 ppm
• Oil Vapor (< 1 mg/liter @ STP)
• Water Saturated
• Odor None
• Particulates and Solids None
• The standards cited above are usually referred to as "Grade D"
14.
15. Rig H2S Monitor and Alarm System
Two four channel H2S monitoring system with two visual-audio alarm system shall be installed
and fully operational on all land drilling rigs operating on known or suspect H2S locations.
1. The sensors shall be located as near as practical to:
• a. The top of the bell nipple.
• b. The flowline opening to the shale shaker.
• c. The Driller's position and about three feet above the floor.
• d. The cellar or underneath the choke manifold above the choke manifold skid floor. This
sensor should be easily moveable so that it can be used around the BOP stack or at the well
testing equipment when necessary.
2. The H2S alarm system (amber strobe lights and horn) shall be set for first alarm at 10 ppm
(visual) and high alarm at 20 ppm (visual & audible). The alarm system shall be located in
clearly visible locations so that personnel in any work area can see and/or hear at least one set.
Audible alarms are to be included inside the rig site living quarters.
16. Rig H2S Monitor and Alarm System
• Hose-line work units, with emergency escape cylinders, shall be provided as
follows:
• 1. Rig floor - six
• 2. On handrail near shale shaker - two
• 3. On rack near mud mixing area - two
• 4. Near choke manifold - one
• 5. In derrick for Derrickman (at monkey board) – two
17. Rig H2S Monitor and Alarm System
• Self contained breathing apparatus (30 min SCBA's) shall be provided as
follows:
• 1. Toolpusher's office/quarters - two
• 2. Company Foreman's office/quarters - two
• 3. Logging Unit (when used) - two
• 4. SCR room - one
• 5. Rig Floor - three
18. Combustible Gas Monitor and Alarm System
• A continuous combustible gas monitor and alarm system with LEL sensor, audible and visual
alarms, and two continuous LEL monitors shall be provided.
The sensor shall be located at either:
• The top of the bell nipple, or The flow line opening to the shale shaker when a rotating head is
in use.
• The alarm system (red strobe light and horn) shall be set at
• 20% (visual) (LEL) for the low alarm.
• 50% (visual & audible) of the LEL for the high level alarm.
• Note: The alarm system shall be clearly visible from work areas on location. The alarm
system (light and horn) shall be located on the rig floor above the doghouse. This setting
criteria applies to cold work situations only.
Editor's Notes
1. Breathing air compressors should be equipped with necessary safety and standby devices.
2. Breathing air compressors should be situated so as to avoid entry of contaminated air.
3. They should be equipped with purifying sorbet beds and filters to further assure greater air quality.
4. They must be equipped with alarms to indicate compressor failure and/or overheating.
CGA G-7.1-2018 provides the means to classify grades (at A, L, D, E, J, and N) of QVLs (Quality verification levels). Each grade corresponds with a typical usage. For example, CGA grade A is typically industrial compressed air and grade D is OSHA breathing air.
