HOUSTON - Halliburton (NYSE: HAL) has entered into a definitive agreement with CARBO Ceramics Inc. (NYSE: CRR) to acquire the assets of Pinnacle Technologies, Inc., including the Pinnacle brand. Pinnacle is a leading provider of microseismic fracture mapping services and tiltmeter mapping services.

     Pinnacle has monitored more than 12,000 hydraulic fracture treatments since its founding in 1992. The company's unparalleled level of fracture mapping experience is now being utilized by operators to overcome the complexities of shale reservoirs across North America, including the Bakken, Barnett, Caney, Fayetteville, Marcellus, Muskwa and Woodford.

     The acquisition complements Halliburton's portfolio of industry-leading stimulation technologies. The addition of Pinnacle's real time stimulation monitoring and analysis capabilities will provide Halliburton's customers with a compelling reservoir stimulation solution. The solution reduces uncertainty and increases the efficiency of fracturing and acidizing services while maximizing reservoir performance and will be especially beneficial in unconventional resources. Pinnacle will operate as a business unit within Halliburton Wireline and Perforating Services.

     "Complex reservoirs are becoming more prevalent, so operators need better information, often in real time, in order to optimize their production solutions," said Cris Gaut, president of Halliburton's Drilling and Evaluation Division. "Pinnacle's capabilities complement Halliburton's vision of the Digital Asset® by combining real-time reservoir understanding with cutting-edge stimulation technology to address the challenges of unconventional resources."

     "The integration of Pinnacle and Halliburton creates exceptional opportunities for our customers and employees," said Kevin Fisher, president of Pinnacle. "I look forward to combining the passion we have for tiltmeter and microseismic fracture diagnostics with the resources and capabilities of one of the world's largest and most respected energy services companies."

     Halliburton has also entered into a multi-year ceramic proppant supply agreement with CARBO Ceramics. "Our supply agreement with CARBO provides supply continuity for our industry-leading propped-fracture stimulation processes," said David King, president of Halliburton's Completion and Production Division.

     Under this agreement, CARBO Ceramics will retain Pinnacle's FracProPT, hydraulic fracturing consulting and Applied Geomechanics assets.

About Halliburton

     Founded in 1919, Halliburton is one of the world's largest providers of products and services to the energy industry. With more than 50,000 employees in approximately 70 countries, the company serves the upstream oil and gas industry throughout the life cycle of the reservoir - from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production through the life of the field. Visit the company's Web site at www.halliburton.com.

About Pinnacle Technologies

     Pinnacle Technologies provides hydraulic fracture mapping services and reservoir monitoring services to the upstream oil and gas industry worldwide. Pinnacle's industry-leading tiltmeter and microseismic fracture mapping services are used to optimize the hydraulic fracturing process, leading to more efficient hydrocarbon recovery. Reservoir monitoring services are used to extract additional recoverable reserves during secondary and tertiary recovery operations by monitoring the long-term flow of fluids into and out of the reservoir. Visit Pinnacle's Web site at www.pinntech.com.

About CARBO Ceramics

     CARBO Ceramics is the world's leading manufacturer of ceramic proppants for use in the hydraulic fracturing of natural gas and oil wells. CARBO Ceramics' mission is to improve production and recovery rates in oil and natural gas reservoirs by focusing on the hydraulic fracturing process. The company achieves this mission by being the leading global provider of high quality proppant and fracture design software to operators of oil and natural gas wells and oilfield services companies. Visit the company's Web site at www.carboceramics.com.