Oil and gas fields are the birthplace of all kinds of toxic gases (hydrogen sulfide, carbon monoxide, gas). The leakage of toxic gases occurs from time to time, and the prevention of toxic gases is an indispensable responsibility of every staff. What measures should be taken for hydrogen sulfide leakage.
1、 The pH value of drilling fluid in sour area should be controlled above 9.5. Strengthen the measurement of hydrogen sulfide concentration in drilling fluid with gas alarm, give full play to the functions of desulfurizer and degasser, and keep the hydrogen sulfide concentration in drilling fluid below 50 mg / m3.
2、 In case of blowout accident, it shall be reported to the competent department of oil and gas field immediately; in case of out of control blowout accident, it shall be reported to the group or joint stock company within 24 hours.
3、 Wind vanes shall be set at the entrance of the derrick, on the derrick, on the edge of the drill floor and at the circulation system. In case of emergency, the operators can evacuate to the upper air outlet. 4、 In places where gas is easy to accumulate, such as up and down the drill floor, vibrating screen and circulating tank, anti riot exhaust fan shall be installed to disperse harmful and combustible gas in the workplace. Portable hydrogen sulfide detector should be equipped for drilling team in sour area.
In addition, it is very important that when the content of hydrogen sulfide exceeds the safe critical concentration of 20 mg / m3, the staff should wear air respirators, and not be allowed to act alone. Special personnel should be assigned to monitor the scene. In sulfur-containing areas, drilling and production personnel on duty shall be equipped with a set of air respirators, and a certain number of public air respirators, so that everyone can use, maintain and inspect them. The drilling technicians of the drilling team are responsible for the safety education of hydrogen sulfide prevention, and the team leader is responsible for the supervision and inspection.
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2021-03-01
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