Which Federal Safety Standards May Not Have Covered Your Work on a Well Site
If you are trying to learn whether a federal rule protected you at the moment of the accident, the text of each standard is the place to start. The lockout/tagout standard, 29 C.F.R. § 1910.147(a)(1), "covers the servicing and maintenance of machines and equipment in which the unexpected energization or start up of the machines or equipment, or release of stored energy could cause injury to employees." It then lists what it does not cover: construction and agriculture employment; employment covered by parts 1915, 1917 and 1918 of its title; installations under the exclusive control of electric utilities for power generation, transmission and distribution; exposure to electrical hazards in electric-utilization installations, which subpart S covers; and "Oil and gas well drilling and servicing."
The process safety management standard, 29 C.F.R. § 1910.119, is aimed at chemical disasters: its stated purpose is "preventing or minimizing the consequences of catastrophic releases of toxic, reactive, flammable, or explosive chemicals." It generally applies to processes involving listed chemicals at or above threshold quantities, and to processes involving a Category 1 flammable gas or a flammable liquid with a flashpoint below 100 °F in a quantity of 10,000 pounds or more in one location, subject to stated exceptions. For a well-site worker, the key line is paragraph (a)(2): it does not apply to retail facilities, "Oil or gas well drilling or servicing operations," or normally unoccupied remote facilities.
These exclusions do not mean that no federal standard reaches an oilfield location. Other OSHA regulations may apply, and a refinery's chemical processes are a different setting from drilling or servicing a well. Which standards governed a particular site, and a particular task on that site, is a fact-specific question.
If a standard did not cover your work, the legal theories available shift rather than disappear. A claim may rest on state negligence law, a different federal regulation, or product liability, the body of law that asks whether a product was defective and whether the defect caused the injury. A lawyer should be able to explain which of these frameworks fits the kind of site and work involved, and what evidence each one calls for.