Woodside Petroleum is producing oil at the Laminaria oilfield. Developed oilfields in Wood County include the Pine Mills Oilfield and the Alba Oilfield. Safaniya Oil Field, the world's largest offshore oilfield, is located in the Persian Gulf. Originally Brent Crude was produced from the Brent oilfield. The recently discovered offshore oilfield was named Chinguetti in its honor. Wink began in 1926, when oil was discovered in Hendrick oilfield in Winkler County. In 1929, oil was discovered at the Darst Creek oilfield. For example, see Midway-Sunset Oil Field, California's largest oilfield. In 1956 he established Isotopes, Incorporated to provide radioactive isotopes for oilfield and industrial purposes. A large oilfield which contains up to of sweet crude oil was discovered in 2007. In August 2015, Schlumberger agreed to acquire oilfield equipment manufacturer Cameron International for $14.8 billion. The Houston area is a leading center for building oilfield equipment. Wheeling Machine Products Company's oilfield coupling business was also sold. The area is also the world's leading center for building oilfield equipment. By 1905, the Humble oilfield was the largest producing oilfield in Texas.