andysevor,
Your observation regarding dilution of MeOH as a hydrate formation depressant is not correct. MeOH is injected as a 100% pure liquid in natural gas streams for hydrate formation depression.
MEG (Monoethylene Glycol), DEG (Diethylene Glycol) and TEG (Triethylene Glycol) when used as hydrate formation inhibitors are used as water-based solutions. All the aforementioned three chemicals are much more expensive than MeOH. Also DEG and TEG have high viscosities at ambient conditions of low temperatures. These factors relate to their being diluted with water and forming a water-based solution before injection as hydrate formation inhibitors.
If you are further interested in knowing about "Gas Hydrate Inhibitor Injection" refer the following link:
http://www.cheresour...n-calculations/
Regards,
Ankur.