The uses of directional drilling, down-hole motors, and steering have multiple applications. For example, these innovations led directly to the development of horizontal unconventional drilling. David Chen is an expert in directional drilling. He spent nearly 18 years as the chief technical scientist at Halliburton and another six years as the senior drilling advisor at Hess Corporation. Since March 2017, he has served as the president at Houston, Texas-area Drill Smart. As Chen discussed in the Society of Petroleum Engineers International (“SPE”) Petroleum Engineering Handbook (2006), the major innovations from directional drilling and steering are…
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