Bermuda-based Nabors Industries has concluded the sale of the assets from its subsidiary, Ramshorn Investments Inc, for about $72 million in cash.Ramshorn Investments sold all of its interest in certain oil and gas properties in California. According to terms of the sale, the purchaser will continue to use Nabors’ rigs.Tony Petrello, Nabors’ president and CEO, said in a statement that the sale will allow the company, which is based in Bermuda and has offices in Houston, to monetise its exploration and production assets.