This is a very important article about trenchless sewer pipe repair, so please pay attention to what it says_._
Drilling fluids are critical to success in horizontal directional drilling (HDD) applications. Since drilling fluid is required to perform a variety of functions, it is important to know why and how it can be such an effective tool and, at the fundamental level, it really is all about chemistry....Drilling Fluids: It?s About the Chemistry
As you can see this is an important article about trenchless sewer line repair. Please make sure to check out some of the other resources I got below.
Here are some more content for you about