HOUSTON (AP) — Halliburton and Baker Hughes are divesting more assets as the rival oilfield services companies seek approval from regulators to join in a $34.6 billion deal. Halliburton will sell its expandable liner hangers operation and Baker Hughes will sell its sand control business in the Gulf of Mexico, its core completions venture, and its offshore cementing business in Australia, Brazil and Norway, among other countries. Federal regulators have been reviewing the deal, and Halliburton said in August that it received a second request for information from the U.S.