“Lighting system in ACSCR Drilling Rig” WELcome A presentation on: “Lighting system in ACSCR Drilling Rig” by Mr. Dhritiman Nath Trainer Mr. D.R.Borgohain

Contents 1. Introduction 2. Illumination level 3. Area lighting circuits 4. Hazardous area lighting system 5. Single line power flow diagram for hazardous area lighting 6. Types of light fitting used in hazardous area 7. Lighting circuits in safe area 8. Components used 9. Brief Summary

Introduction Visited S-3 rig , LOC – NLJ on 09/02/2015 Observed and identified Area lighting system in the rig along with other assignments. The drilling operation is a 24 hours continuous process: “After spudding in, till the final depth is reached in a particular location”. There are different equipments located in different areas within the well site. Sufficient illumination level is required for safe working during the drilling operation.

Illumination level As per data obtained from S-7 RIG,LOC: HXI-H Pump House Shed : 40 lux Diesel tank area transfer Pump : 10 lux Derrick floor : 90 lux Pipe rack : 30 lux Staircase : 20 lux Monkey board : 50 lux PCR ACPCR : 149 lux DCPCR : 139 lUX Compressor shed : 60 lux Chemical loading area : 70 lux Mud tank & Mud return channel area : 71 lux Sub-structure : 115 lux Engine rooms : 20 lux

area lighting circuits Lighting circuits in a Drilling rig are classified into two categories – a) Hazardous Area lighting b) Safe Area lighting The hazardous area lighting circuit is designed to meet the standard as per CEA(safety and electric supply) Regulations, 2010. The different working areas are – a) Derrick floor, b) Mast, c) Cellar, Shale shaker, d) Desander, e) Desilter, f) Mud tank, f) Mud pump etc. fall within a radius of 30 mtrs from cellar pit. The safe Area lighting includes Bunk houses, crew hut and the areas fall beyond the radius of 30 mtrs from the cellar pit.

Hazardous Area Lighting system The complete lighting system works on 230 VAC, Ph to Ph, 50Hz. The 230VAC Ph- Ph, 50Hz is used as per CEA Regulation Ch-IX, Regulation 102, II, b. Lighting circuit consists of 20 no. of circuits.

Single Line power flow diagram for Hazardous area lighting

Two lighting transformers are used to supply power to hazardous area lighting. 60 KVA, 415/230 volts,3-phase,50 Hz Dyn11

Types of Light fittings USED IN HAZARDOUS AREA Type of fitting Type Flameproof well glass fitting 160 W MLL Flameproof HPMV flood light 250 W Red aviation warning lamp fittings(LED) 10 cd Flameproof bulk head fittings

Different Fittings FLP fittings

Lighting in the safe area

Two isolation transformers are used to give power supply to safe area lighting. 30 KVA, 415/415 Volts,3 phase,50 Hz Dyn11 Lighting system is operating at 230 V ,50 Hz Safe area lighting includes bunk houses , security hut, flood lights etc.

Different fittings Son fitting Non metallic tube light fitting

Components USED Plugs, Sockets and Cables: 1.Appleton plug and sockets(20A, 250 V) 2. BCH plugs(DS1) and sockets.(DS-2),16A,415/240 volts) 3. 3x 1.5 sqmm, EPR insulated, CSP Sheathed cable is used for lighting. 4. Double compression cable glands for glanding of the cables for the light fittings. 5. MCCB – 100A,125 A 6. RCBOs 20 Amps , 300 mA.

BRIEF Summary Importance of lighting in a drilling rig Various areas of lighting in a drilling rig Single line diagram Various light fittings Equipment and components used

Thank You