The oil drilling offshore belongs to a special operating environment, which is significantly different from conventional lighting requirements. For example, in terms of uniformity of light distribution, color rendering index and color temperature of the light source, the requirements are not very strict.However, there are special requirements for the quality of lighting fixtures, vibration resistance, resistance to harsh environments, and explosion-proof safety. Recently, gas discharge light sources such as fluorescent lamps and metal halide lamps are mainly used for the lighting of oil drilling offshore. When this kind of light source is used as commercial and home lighting, it has incomparable superiority. However, when this type of light source is used in the petroleum cobalt drilling, its disadvantages are obvious, such as poor vibration resistance and poor low temperature resistance. Therefore, it is necessary to find a new type of light source to solve these problems from the light-emitting principle and lamp structure. LED technology is a kind of solid light source. Compared with traditional lamps, the explosion-proof lights developed and produced by it are fundamentally different in structure, electricity, light distribution and explosion-proof.

 

 

1. 1. On-site environmental characteristics and lighting status

   The lighting environment of the oil drilling offshore has its particularity, mainly including the following 4 points:

   (1) Explosive. In case of fire, electric spark, high temperature and other ignition sources, it may cause combustion or even explosion. To ensure safety, the electrical appliances (including lighting fixtures) installed and used should be safe and explosion-proof.

   (2) The vibration is large. During drilling, especially during relocation, the equipment vibrates greatly. Therefore, the electrical equipment installed and used should have good anti-vibration performance.

   (3)High-risk, continuous operation, difficult to replace and maintain. Therefore, lighting fixtures should have a long life and less maintenance.

   (4) The climatic conditions are harsh, so the lamps should have high environmental adaptability.

   At present, most of the lamps for drilling lighting are fluorescent lamps or metal halide lamps. This kind of lamps has mature technology and comfortable vision. It is widely used in indoor and general lighting, and its disadvantages are obvious when used in the drilling environment.

   ①　Poor vibration resistance and easy to damage. The equipment at the drilling is highly vibrating, especially during the relocation process. The lamp tubes made of glass are often damaged and need to be replaced in large quantities, resulting in a lot of manpower and material loss, and mercury vapor and broken glass are also causing the environment harm;

   ②　There are many faults and maintenance is difficult, especially for high-risk equipment parts such as derricks. Once the lamps are damaged, they cannot be repaired in time, which will seriously affect the safety of night production;

   ③　The safety factor is low, especially for gas discharge lamps such as metal halide lamps. The temperature of the lamps is high during operation, which is likely to become a hidden danger of safety accidents;

   ④　The environmental adaptability is poor, and it often fails to work normally in a low temperature environment.

   2. LED technology and its lighting advantages

   (1)LED light source

   LED (Light Emitting Diode) is a kind of solid-state semiconductor device, which can directly convert electricity into light.

   Since the discovery of the electroluminescence (LED) phenomenon in 1907, it has traveled more than 100 years. Since the 1990s, LED technology has continuously made breakthroughs. The technology in the fields of display, indication, and medium and large-size backlights has become increasingly mature. The field of application continues to expand. In the field of functional lighting, although LED technology is in its infancy, it is developing rapidly. At present, white LEDs with luminous efficiency above 120Lm/W have been mass-produced.It has become the fourth generation of electric light sources after incandescent lamps, fluorescent lamps, and high-pressure metal gas discharge lamps, and is called the ultimate form of electric light sources.

   The LED, determined by the light-emitting principle, is the electric light source with the longest lifespan and the highest energy-saving benefit so far. It does not contain harmful substances, is environmentally friendly and has no pollution, is resistant to vibration, and has the advantages of shock resistance unmatched by other traditional light sources.

   light source	Principle of luminescence	End of life
   Incandescent lamp	When the electric current passes through the spiral tungsten filament in the incandescent lamp, a thermal effect occurs, so that the incandescent lamp radiates visible light and infrared light.	The evaporation loss of the tungsten filament causes the filament to fuse.
   Fluorescent lamp	The ballast supplies pulse voltage to preheat the filament and activate the electron emission material on the filament (cathode). The electrons collide with the mercury atoms inside the tube to generate ultraviolet light, and the ultraviolet light is refracted by the phosphor coated on the tube wall to reflect the visible light.	The emitting material on the electrode is exhausted and can no longer emit electrons.
   High-intensity gas discharge lamp	The collision of electrons, atoms, and ions in the discharge tube.	The emission material is exhausted, so that the arc cannot be triggered.
   LED	The recombination of electrons and holes in the PN junction emits light.	The light attenuation is too large, or the PN junction is broken down.
   light source	Principle of luminescence	End of life

   LED lighting

   
   

   LED lighting is another revolution in lighting sources after incandescent lamps and fluorescent lamps. It is recognized by all countries as the most promising high-efficiency lighting industry. At present, as a new generation of light source technology, LED is being widely recognized and recognized by people. More and more LED lighting products appear in roads, squares, vehicles, docks and urban landscapes. In some places, there are high requirements for energy saving and longevity. Inconvenient uninterrupted lighting places, such as tunnels, underground parking lots, etc., LED has obvious advantages and significant benefits.

   3. The advantages of LED used in oil drilling offshore lighting

              The explosion-proof lamps developed and produced with LED light sources have the following special advantages when applied to drilling offshore lighting.

   (1)Excellent safety and explosion-proof performance. LEDs driven by DC low voltage (≤36V), due to high luminous efficiency and low heat generation, operate under safe voltage and low temperature (T6≤85℃), which not only improves the explosion-proof performance of the lamp itself, but also reduces it from the source Accidents caused by lamps have improved the safety protection level of the drilling offshore.

          Due to the low power of LED lamps and low input current, the tendency of cable overheating and aging is reduced and the safety of power supply lines is improved.

   (2) Excellent anti-vibration performance. LED is a solid-state light source, and its excellent anti-vibration and impact resistance are unmatched by any traditional light source. It is used for drilling lighting to fundamentally overcome the disadvantages of vibration intolerance and extremely easy damage caused by the glass lamp tube, which can save manpower and material resources, reduce maintenance costs, and reduce environmental hazards.

   (3) Long service life. LED directly converts electricity into light, and there is no mechanical damage when working. The effective life of the light source can reach 50000-100000 hours. It is the electric light source with the longest service life so far, which will greatly reduce the frequency of maintenance of lamps and lanterns and play a positive role in guaranteeing production.

   (4) Super strong environmental adaptability. The low temperature resistance of LED is much better than that of traditional light sources. After necessary treatment, it can be lit and work normally in the environment of -45℃ and below. This provides an effective solution to the problem of wellsite lighting under low temperature conditions.

   (5) High efficiency and energy saving. Compared with traditional light sources, LED energy-saving is more than 60%, and its use in drilling lighting means saving expensive fuel. For the increasingly popular grid-powered drilling, the energy-saving benefits are more direct and significant. Used for emergency lighting, the battery with the same capacity can extend the lighting time exponentially due to its high efficiency (without circuit inverter).

 

 

 

 

4. 4. LED recommended technical indicators for oil drilling offshore

• LED light source

• Light efficiency ≥100 Lm/W;

• Color rendering index ≥80;

• Correlated color temperature: Generally, warm color table (Tcp<3300K) should be used in low illuminance venues, intermediate color table for medium illuminance (3300K≤Tcp≤530OK), and cold color table for high illuminance (Tcp>5300K). In addition, cold color tables are used in warm climates, and warm color tables are used in cold conditions. In general, intermediate color tables are used.

• Light source life ≥50,000h.

4. （2）Power supply

   ①　Using constant current drive, the output current stability accuracy is ≤±25%;

   ②　Used for explosion-proof power supply output voltage ≤ DC 36V;

   ③　Wide voltage and wide frequency input, adapt to the power requirements of different countries and regions;

   ④　Power factor ≥90%;

   ⑤　There should be short circuit, overvoltage, and overheat protection inside the power supply.

   （3）Lamp material and structure

   • The lamp housing should be made of aluminum metal material, the strength meets the requirements, and it has a good heat dissipation structure and sufficient heat dissipation area;
   • Reasonable structure, easy to install and maintain.

   （4）Protection and explosion-proof performance

   ① The protection level of outdoor lamps should not be less than IP65;

   ② Anti-corrosion performance: indoor lamps should not be lower than F1, outdoor lamps should not be lower than WF1;

   ③ Explosion-proof performance The performance of explosion-proof LED lamps should meet the requirements of GB3836-2010《Explosive Environment》and pass the inspection of the national authority.

   （5）Low temperature lights

   It shall meet the requirements specified in GE/T 2423.1-2008《Environmental Testing of Electrical and Electronic Products Part 2: Test Method Test A: Low Temperature》, and pass the inspection by the national authority.

   • Emergency device

   ①The emergency time is not less than 60min;

   ②Emergency response time≤1s;

   ③The number of battery charging and discharging cycles is ≥500 times;

   ④Equipped with photosensitive control switch and working status indicator.

   5. LED selection and application precautions

   When choosing and using LED explosion-proof lamps, you need to pay attention to the following two aspects.

   (1) Under the current conditions, LEDs from internationally renowned brands should be used to ensure the reliability of the quality of the lamps and the comfort of the lighting.

   (2) Ensure a good heat dissipation system. As LED is a semiconductor component, the temperature of the chip directly affects its life during operation, so the heat dissipation of the lamp should be fully considered when using it.

   CESP is a state-level high-tech enterprise and a contract energy management company that has been filed by the three ministries and commissions. CESP strive to high quality patent product in military & industry areas, is the Top OEM & ODM supplier for explosion proof lighting solution of China and the 1st Company in China to be certify for hazardous location led lighting fixture by UL & CUL. In December 2020, CSA Group issued UL844 and CSA 137 standard explosion proof certificate (Division 1) for CES-SC series, that means that CESP has made another big progress in the field of explosion-proof lighting.

 

 

 

 

 

CES-EX-GB-02 Was Designed In 2019 And Obtained UL Certification. It Can Be Used In Hazardous Environments Such As Class I, Division 2, Groups A, B, C And D; Class II, Division 2, Groups F And G; Class III Under Use.

Explosion Proof Led High Bay Lamp Body Is Made Of ADC12 Aluminum Alloy. The Industrial Designer Designs The Lamp Body Heat Dissipation Structure, Which Has A Sufficient Heat Dissipation Area. At The Same Time, The Lamp Body Is Coated And Colored, Which Not Only Improves The Durability And Makes The Lamp More Beautiful. The Shell Glass Adopts High-Strength Tempered Glass, Which Has Been Tested By Internal Pressure And Hydraulic Pressure. The Anti-Corrosion Grade Is WF2. The Power Supply Adopts The Well-Known Brand MEAN WELL HLG Series Power Supply. The Voltage Is In The International Common AC Input Range (Up To 305VAC, Efficiency Can Be As High As 94%, And Conforms To The World Lighting Equipment Safety Specification, IP Grade Is IP67, Can Withstand 4J Pressure, Indoor And Outdoor Installation Can Be Used, Can Be Applied To 40°C ~ 40/45/50°C Dry/Moisture/Rain Environment, And CESP Promises 5-Year Shelf Life. The Explosion Proof Light Beads Use High-Quality LM80 Certified Chips, And The Luminous Efficiency Is As High As 142LM\W. For Example, A 30W Explosion-Proof LED Work Light Can Produce 3600LM And A 115° Beam Angle. In General, The LED Explosion-Proof Patio Light Is Beautiful In Appearance, Simple And Convenient To Operate, And Can Be Installed In Ceiling, Pole-Mounted, Wall-Mounted Lighting And Other Methods, With High Structural Strength. It Is Suitable For General Area Lighting In Wastewater Treatment, Oil And Gas Refineries,  Drilling Rigs, Petrochemical Facilities, Food And Beverage Facilities, Tunnels, Outdoor Wall And Stanchion Mounted General Area Lighting, And Where Flammable Vapors, Gases, Ignitable Dusts, Fibers Or Flyings Are Present.

 

 

 

   If you want to know more details of this lamp, you can click here to view it. The following are some simple parameters of Ex-proof High bay light.

Model	Power (W)	Input voltage: AC100-277V;  Frequency: 50/60Hz;
		CCT：3000K~6500K
		Power factor:0.97
		Luminous flux (LM)	Light efficiency (Lm/W)	LEDs Chip	LEDs Type （3V）	Power Model	Weights (kg)
CES-EX-GB-02-30	30	3600	120	84PCS	2835	HBG-60-1400P	3.0/3.6
CES-EX-GB-02-40	40	4800	120	84PCS	2835
CES-EX-GB-02-60	60	7200	120	120Pcs	2835	HBG-100P-36A	7.0/8.2
CES-EX-GB-02-80	80	9600	120	120Pcs	2835
CES-EX-GB-02-100	100	12000	120	252Pcs	2835	HLG-185H-36A	14.3
CES-EX-GB-02-120	120	14400	120	252Pcs	2835
CES-EX-GB-02-150	150	18000	120	252Pcs	2835
CES-EX-GB-02-185	185	22200	120	252Pcs	2835
CES-EX-GB-02-200	200	24000	120	252Pcs	2835

   If you want to know more details of this lamp, you can click here to view it. The following are some simple parameters of Ex-proof High bay light. Offshore drilling platforms are important production bases for petroleum products and natural gas. The main component of natural gas is methane. People and equipment are transported by helicopters in these off-shore offshore market bases. The concentration of oil and gas generated during drilling is constantly changing. These locations must use CLASS I explosion-proof products. Similarly, in factories that use these oil and gas products as raw materials, for example, chemical plants that use pentane to further chemically react with ether groups, chemical fertilizer factories, and so on, all need to work under safe and non-hazardous conditions. These places must be absolutely flame retardant. Explosion-proof lamps and other explosion-proof switchgear equipment developed by CESP are dedicated to these CLASS I hazardous environments.