Austin, TX-based Drillinginfo, a software service and data analytics provider for the oil and gas industry, has bought Oildex to add to its recent purchases of PLS Inc. and 1Derrick. The Oildex transaction marks its first since private equity firm Genstar Capital became majority shareholder. The Oildex acquisition would allow Drillinginfo to continue expanding its exploration and production, and oilfield services businesses, management said. Oildex, a portfolio company of private equity firm Accel-KKR, provides financial automation solutions for the industry. Drillinginfo CEO Jeff Hughes said Oildex would help accelerate “our growth priority in the large mineral owner market.” Terms of the transaction were not disclosed.