The Bertha Rogers Borehole is a former natural gas well in Burns Flat, Dill City, Oklahoma, US.

Today plugged and abandoned, it was originally drilled by the Lone Star Producing Company as its oil-exploratory hole number 1–27 between October 25, 1972 and April 13, 1974, reaching a then world record terminal depth of 31,441 feet (5.9547 mi; 9,583 m).

The well was plugged back and completed in the Granite Wash from 11,000 to 13,200 feet (3,400 to 4,000 m)[clarify] as a natural gas producer.

[3] According to publicly available well records from the Oklahoma Corporation Commission, the Bertha Rogers hole ceased production of natural gas in July 1997.

[4] The Bertha Rogers hole was surpassed in 1979 by the Kola Superdeep Borehole dug by the USSR, which reached 12,262 metres (40,230 ft; 7.619 mi) in 1989 and remains the deepest human-made hole on Earth as of 2024[update].