Carbo Ceramics announced that it has entered into a master purchase agreement for goods and services with Halliburton Energy Services Inc.; the MPA sets the general terms and conditions for the sale of the company's products and the provision of its services to Halliburton. The MPA, which has a four-year term that may be extended for an additional four years, provides Halliburton limited volume discounts and, with certain exceptions, an exclusive right to review new products/technologies of the company prior to commercialization, all subject to Halliburton maintaining certain minimum percentages of its ceramic proppant consumption with the company. The MPA replaces the company's proppant supply agreement with Halliburton, which expired as of June 30, 2016.