053-5 Wyo. Code R. § 5-1
(a) All wells shall be reasonably controlled to the extent that they do not present a fire hazard or an undue health or injury hazard to the employee. Work on or near a well that is expelling gas, oil, water or combination thereof shall be minimized and then only after all reasonable safety precautions are taken.
(b) The well operator shall be responsible for the overall control of the well. All reasonable methods of well control shall be employed.
(c) The well operator shall ensure that the employer is advised of any known potential hazard.
(d) In the event of a sudden, unexpected expulsion of flammable or toxic material, the work on the well shall be halted and the location and equipment cleaned and/or purged and made safe before work is continued. Other than that required to bring the well under control, there shall be no rod and tubing work performed on wells that are flowing, "kicking", flowing by heads, and/or emitting gas in dangerous quantities. (Reference Chapter4, Section 5 . of these rules and regulations.)
(e) Stoves in operation, open fires, etc., shall be extinguished if flammable substances such as oil or gas are near or in the air. (See also, Chapter 5, Section 10. of these rules and regulations).
(f) A mud box shall be utilized on all rigs to convey any fluids away from the working area while pulling wet strings.
(g) In the event that the fluid is coming over top of tubing while pulling and the fluid cannot be swabbed down or circulated with a fluid heavy enough to keep fluid from spilling over, the pipe shall be perforated and the hole circulated until a static condition is reached or an equally effective method utilized to reduce the potential fire or toxic hazard to personnel.
(h) Well cellars, well floors and ground areas adjacent to derricks or tanks shall be kept reasonably free from accumulation of oil which might create or aggravate fire hazards.
053-5 Wyo. Code R. § 5-1