Gaobeidian City, Long Yang Drilling Engineering Co., Ltd. Mobile: 18233416888 Yan manager landline: 0312-2832019 Website: www.gbdlyzj.com wells specialized knowledge of the world's deepest oil well in the 1970s in the United States - the 1st Boer Zi Rogers Well. Depth of 9583 m, January 25, 1972 to spud in May 1974 drilled USSR (now Russia) (CY-3) Cora 3 wells on the Kola Peninsula, the design in 1966, 1970 spud until July 1992, depth 12260m, is currently the world's deepest oil well. Radius of the Earth is how much? 6370km. How much does the average thickness of the crust? 33km. The current technology can not reach. Gaobeidian City, Long Yang Drilling Engineering Co., Ltd. has more than ten years of drilling history, we have a wealth of experience in drilling, sophisticated drilling technology, drilling and reasonable price, as well high to geothermal development-oriented, run other drilling the professional team of the project. My company has GZ2600 rig, GZ2000 rig, GZ600 rig, GZ400 rig, can contract a variety of 2000-100 meters of drilling operations. In recent years, our company in Baoding, Tianjin, Beijing and other places, farmland tank wells, dewatering well, ground source heat pump wells, all kinds of rock wells, well completion rate of 100%. My company sales of submersible pumps, sewage pumps, fire pumps, boilers, pumps, no negative pressure water supply equipment, fire fighting equipment, also much new and old customers. Long Yang Engineering Co., Ltd. adhering to the "integrity first, quality first" spirit, to provide you with first-class service, customers are welcome to contact us. Welcome friends to negotiate business with us! Gaobeidian City, Long Yang Drilling Engineering Co., Ltd. Mobile: 18233416888 Yan manager landline: 0312-2832019 Website: www.gbdlyzj.com