LOWELL GEORGIA / SCIENCE PHOTO LIBRARY LOWELL GEORGIA / SCIENCE PHOTO LIBRARY
Workers adding piping to a new oil well. Once oil has been discovered by drilling, the new well has to be converted into a production site. To do this, the drilling pipes are withdrawn from the well and larger-bore pipes inserted. When complete, a well-head is fitted and the drilling rig dismantled. The well seen here is in Wyoming, USA.
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