Bertha Rogers

Bertha Rogers No. 1-27 is an exploration well GHK and Lone Star Company to search for natural gas in the Anadarko Basin in the United States. She held from 1974 to 1979 the world record for the deepest hole in the world.

The well is located in Washita County, Oklahoma, about 32 km (20 miles) east of Sayre, 18 km (11 miles) west of Cordell and south of Burns Flat.

Specifically, a pipe was manufactured with extra large diameter of the borehole. The bore began on November 12, 1972 and lasted until April 18, 1974 (date of release). The average advance was 18 m (60 ' ) per day. The final depth was 9,583 m ( 31,441 ') in the Arbuckle formation where the drill head stuck in liquid sulfur. In between, it was also encountered hydrogen sulfide. At a depth of 9,520 m had been pierced kambrisches carbonate rocks. It ruled pressures up to 171 231 kPa ( 24,835 psi). The cost was estimated $ 7 million and no commercially exploitable hydrocarbon deposits have been found, a little gas was present.

The bore hole surpassed the Baden Ranked # 1-28 with a depth of 9,159 m ( 30,050 ') in Beckham County from 1970 to 1972 were involved in the same company. It was surpassed on 6 June 1979 by the Soviet Kola hole. In the U.S., the depth was not surpassed until 2004.