Tim Probert, president of global business lines, says that horizontal drilling, a process in which a well is drilled down vertically and then angled around a curve to reach reservoirs from a horizontal angle that increases the well's exposure, is now 55% of Halliburton's total activity.

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Fracking is the underground fracturing of very deep underground shale deposits where natural gas is sequestered and then is recovered using normal process procedures of deep and horizontal drilling for recovering natural gas.

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Horizontal drilling can offer many advantages to the gas extraction process, allowing wells to be drilled in several directions from one pad.

BBC: Fracking: Untangling fact from fiction