While there was experience with horizontal drilling, the technology did not become more prevalent until the late 1980s and early 1990s. This was the result of advances in measurement and sensing, directional drilling, seismic analysis, and in special motors that would do a remarkable thing—a mile or two underground, they would propel the drill bit forward once it had made its ninety-degree turn and started moving horizontally. And it required one other thing—extensive “trial and error.” Devon was now positioned to try to meld horizontal drilling with fracking.