Contractors-Oil Field is a subdivision of the SIC Code 1381, which involves the drilling of oil and gas wells. Companies in this industry provide a range of services related to the exploration, drilling, and production of oil and gas. These services include drilling, well completion, well maintenance, and well abandonment. Contractors-Oil Field companies work in a variety of locations, including onshore and offshore drilling sites, and may operate in harsh and remote environments. The work of Contractors-Oil Field companies involves the use of specialized equipment and machinery, as well as highly skilled personnel. These companies are responsible for ensuring that oil and gas wells are drilled safely and efficiently, and that the wells are properly maintained throughout their lifespan. Contractors-Oil Field companies may also be involved in the transportation and storage of oil and gas. The success of Contractors-Oil Field companies is closely tied to the price of oil and gas, as well as the demand for these resources. As such, the industry is subject to fluctuations in the global economy and geopolitical events. Overall, Contractors-Oil Field is a vital industry that plays a crucial role in the production of oil and gas, which are essential resources for many industries and consumers around the world.