Drilling fluid compositions comprising a polymerized biorenewable oil
A drilling fluid composition is provided herein. The drilling fluid composition comprises biorenewable components, such as a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil. The drilling fluid composition is thus more environmentally friendly than conventional, petroleum-based alternatives. Water-based and oil-based drilling fluids comprising the drilling fluid composition are also provided as are methods of lubricating a borehole (e.g., a downhole well) utilizing the drilling fluid composition.
1 . A drilling fluid composition comprising a polymerized biorenewable oil, biodiesel and a nonpolymerized biorenewable oil, wherein the ratio of biodiesel to polymerized biorenewable oil is from 10:1 to 1:10 and the ratio of nonpolymerized biorenewable oil to polymerized biorenewable oil is from 10:1 to 1:10.
2 . The drilling fluid composition of claim 1 , wherein the ratio of biodiesel or nonpolymerized biorenewable oil to polymerized biorenewable oil is from 4:1 to 1:4.
3 . The drilling fluid composition of claim 1 , wherein the polymerized biorenewable oil has an oligomer content of from about 15 wt % to about 70 wt % and a polydispersity index of from about 1.2 to 20.0.
4 . The drilling fluid composition of claim 1 , wherein the polymerized biorenewable oil has a number average weight less than 100,000.
5 . The drilling fluid composition of claim 1 , wherein the polymerized biorenewable oil is a heat bodied oil.
6 . The drilling fluid composition of claim 1 , wherein the polymerized biorenewable oil is polymerized by co-reaction with a material selected from dibasic acids, polyols, amines, epoxides, phenolics, and olefinic hydrocarbon monomers.
7 . The drilling fluid composition of claim 1 , wherein the polymerized biorenewable oil or nonpolymerized biorenewable oil comprises a vegetable oil selected from the group consisting of soy, canola, rapeseed, mamouna, mustard, palm, babassu, pine, coffee, cottonseed, sunflower, jojoba, tung, castor, olive, peanut, cashew nut, pumpkin seed, corn, rice, perilla, sesame, coconut, safflower, linseed, hemp, Chinese tallow tree, tall oil, lecithin (phospholipids), and combinations thereof.
8 . The drilling fluid composition of claim 1 , wherein the biorenewable oil or nonpolymerized biorenewable oil comprises soy oil, canola oil, rapeseed oil, or a combination of these.
9 . The drilling fluid composition of claim 1 , wherein the composition comprises less than 5 wt % of petrodiesel, mineral oil, and mineral oil derivatives.
10 . The drilling fluid composition of claim 1 , wherein the composition is substantially free of petrodiesel, mineral oil, and mineral oil derivatives.
11 . A water-based drilling fluid comprising up to about 15 wt % of a drilling fluid composition comprising a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil, wherein wt % is based upon the total weight of the water-based drilling fluid, and wherein the drilling fluid composition comprises biodiesel or a nonpolymerized biorenewable oil and a polymerized biorenewable oil in a ratio of biodiesel or nonpolymerized biorenewable oil:polymerized biorenewable oil of from 10:1 to 1:10.
12 . The water-based drilling fluid of claim 11 , wherein the polymerized biorenewable oil or nonpolymerized biorenewable oil comprises soy oil, canola oil, rapeseed oil, or a combination of these.
13 . The water-based drilling fluid of claim 11 , wherein the drilling fluid composition comprises biodiesel or a nonpolymerized biorenewable oil and a polymerized biorenewable oil in a ratio of biodiesel or nonpolymerized biorenewable oil:polymerized biorenewable oil of from 4:1 to 1:4.
14 . An oil-based drilling fluid comprising at least about 50 wt % of a drilling fluid composition comprising a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil, wherein wt % is based upon the total weight of the oil-based drilling fluid, and wherein the drilling fluid composition comprises biodiesel or a nonpolymerized biorenewable oil and a polymerized biorenewable oil in a ratio of biodiesel or nonpolymerized biorenewable oil:polymerized biorenewable oil of from 10:1 to 1:10.
15 . The oil-based drilling fluid composition of claim 14 , wherein the drilling fluid composition comprises polymerized biorenewable oil, biodiesel and a nonpolymerized biorenewable oil.
16 . A method of lubricating a borehole comprising:
providing a drilling fluid composition comprising a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil to a borehole; and
circulating the composition through the borehole;
wherein the drilling fluid composition comprises biodiesel or a nonpolymerized biorenewable oil and a polymerized biorenewable oil in a ratio of biodiesel or nonpolymerized biorenewable oil:polymerized biorenewable oil of from 10:1 to 1:10.
17 . The method according to claim 16 , wherein the drilling fluid composition is oil-based.
18 . The method according to claim 16 , wherein the drilling fluid composition is water-based.