Drilling fluids containing polyethoxylated tetraalkyl acetylenic diols
AssigneeTexaco Inc.
InventorThad O. Walker
Life of this patent
Estimating the term…
Abstract
Aqueous drilling fluids containing a minor amount of polyethoxylated tetraalkyl acetylenic diols. Such fluids are especially useful where reduced torque drilling fluids are needed. Another embodiment of this invention relates to a method of drilling utilizing the above-described fluids.
Claims22
An aqueous drilling fluid containing in the aqueous phase clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a polyethoxylated tetramethyl decynediol or a sulfurized polyoxyethylated tetramethyl decynediol wherein the number of ethylene oxide groups therein is on an average of from 3.5 to about 30, said decynediol being present in said drilling fluid in an amount of from about 0.5 to about 5 pounds per barrel.
In a method of drilling wells wherein a drilling fluid is circulated in the well in contact with an earth formation during the drilling operation, the improvement which comprises contacting said earth formation with an aqueous drilling fluid containing in the aqueous phase clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a polyethoxylated tetramethyl decynediol or a sulfurized polyoxyethylated tetramethyl decynediol wherein the number of ethylene oxide groups therein is on an average of from 3.5 to about 30, said decynediol being present in an amount of from about 0.5 to about 5 pounds per barrel and being effective to reduce the torque of said drilling fluid.
Dependencies are inferred from the claim text.