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James Abercrombie

Blowout Preventer (BOP)

U.S. Patent No. 1,569,247
Inducted in 2022
Born July 7, 1891 - Died Jan. 7, 1975

James Abercrombie, a Texas oil driller, and Harry Cameron, a machinist, designed the world’s first reliable blowout preventer (BOP) to successfully contain catastrophic well blowouts the dangerous, uncontrolled release of oil or natural gas caused by the failure of a pressure control system. Their mechanism allowed operators to close wells, control pressure during drilling operations, prevent surface oil accumulation at drilling sites and most importantly, save lives.

One of 13 children, Abercrombie spent his early years in farming and working on his family’s dairy farm before getting involved in the oil business. In 1920, Abercrombie and Cameron formed Cameron Iron Works. There, the two developed Abercrombie’s idea for a “ram-type” blowout preventer that would use hydrostatic pistons (rams) to clamp the drill stem and create a seal against well pressure during a blowout.

Before the invention of the BOP, oil wells were left to “blow out” after tapping to sufficiently reduce pressure for capping. Today, when installed on a wellhead, the BOP allows for complete control of pressure during drilling. Patented in 1926, Abercrombie and Cameron’s “Type MO BOP” could withstand up to 3,000 pounds per square inch (psi), then an industry record.

Abercrombie earned a total of 30 U.S. patents and became one of Houston’s most generous philanthropists. His many contributions include sizable donations to Rice University and the Texas Children’s Hospital. Support for this hospital would continue through the James S. Abercrombie Foundation, which was established in 1968.

Cameron Iron Works evolved over the decades into Cameron International, which became part of Schlumberger Ltd. in 2016. Today, Cameron is a leading manufacturer of oil and gas pressure control and separation equipment, and the company remains one of the leading providers of BOPs in the industry.


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