A Comprehensive Approach to Mitigating Inadvertent Release of HDD Drilling Fluid
An inadvertent release or inadvertent return (IR) of horizontal directional drilling (HDD) fluid is a condition that develops despite: i) appropriate subsurface investigation, ii) engineering design and analyses of the drill path, iii) evaluation of subsurface pressures, iv) use of appropriate drilling fluids, v) following the drill path that was designed, and vi) monitoring and adjusting drilling fluid pressures throughout the drilling process.
