Bio-based synthetic fluids

A method comprising producing an orifice in a substrate by at least injecting a viscosity-altered paraffinic fluid into the substrate, wherein

• the paraffinic fluid comprises a hydrodeoxygenated product and a hydroisomerized product;
• the hydrodeoxygenated product is produced by hydrodeoxygenating a bio-derived feed;
• the hydroisomerized product is produced by at least partially hydroisomerizing the hydrodeoxygenated product;
• the bio-derived feed comprises bio-derived fatty acids, fatty acid esters, or a combination thereof;
• the hydrodeoxygenated product comprises n-paraffins;
• the hydroisomerized product comprises isoparaffins;
• the paraffinic fluid contains less than about 1 wt % aromatics;
• and
• the n-paraffins
• have a kinematic viscosity of less than about 10 cSt at 40° C.;
• and
• have a biodegradability of at least about 40% after about 23 days of exposure to microorganisms;
• the isoparaffins
• are at least about 80 wt % mono-methyl branched paraffins where the mono-methyl branched paraffins comprise less than about 30 wt % terminal branched isoparaffins;
• have a kinematic viscosity of less than about 10 cSt at 40° C.;
• and
• have a biodegradability of at least about 40% after about 23 days of exposure to microorganisms.