Nabors Industries Limited is an American global oil and gas drilling contractor that has operated since 1972. Based in Houston, Texas, Nabors owns the largest land drilling fleet in the world with approximately 400 rigs in more than 20 countries. The company consists of the following business segments: U.S. Drilling, Canada Drilling, International Drilling, Drilling Solutions, and Rig Technologies. Nabors is notable for its historic association with the Guggenheim family.