This column goes over a few more ways to evaluate mixed-metal hydroxide (MMH) fluids, and touches on troubleshooting when contractors don't get the results they want.

Back in early 2000, when I first started working with mixed-metal hydroxide, very few drillers had ever heard this type of fluid and even fewer had ever seen it used.

Aqueous drilling through clay has always been a potentially difficult situation and, over the years, sundry solutions have been presented to combat this sticky enemy.

Everyone can agree that safety has become an integral part of any construction site. We all have the same goal — to come home safely at the end of every day.