Drilling fluid lubricant with excellent friction reducing performance

Abstract

The invention belongs to the field of oilfield chemistry, and relates to a kind of biodiesel oil and a small amount of mineral oil as base oil, which is blended with suitable surfactants, anti-friction and anti-wear additives, anti-foaming agents and other additives, and has excellent anti-wear performance. Drilling fluid lubricant and preparation method thereof. The mass percentage of each component of the lubricant provided by the invention is: biodiesel (30-50%), mineral oil (10-20%), Span-80 sorbitan oleate (10-30%) , triethylamine dodecylbenzenesulfonate ABSN (10-30%), anti-friction and anti-wear additives (1-5%), defoamer (0.5-1%). The drilling fluid lubricant provided by the invention has excellent anti-friction performance, and the reduction rate of the lubrication coefficient reaches about 85.0%.

Description

technical field [0001] The invention relates to a drilling fluid lubricant with excellent anti-wear performance, which is prepared by blending biodiesel and a small amount of mineral oil as base oil, adding suitable surfactants, anti-wear and anti-friction additives, anti-foaming agents and other additives and its preparation method. Background technique [0002] In oil drilling and completion operations, various frictions are unavoidable when the drill bit is drilling, resulting in equipment wear. The main function of the drilling fluid lubricant is to reduce the friction of the mud cake, reduce sticking sticking and torque transmission loss. Improving the lubrication performance of drilling fluid can reduce hydraulic friction, mud cake viscosity coefficient, drill string torque, axial resistance, energy consumption, shorten tripping time, reduce working resistance of drill bit, and prolong drill bit life, thereby improving drilling performance. Technical and economic ind...

AI Technical Summary

Problems solved by technology

[0008] At present, the relatively weak lubricants in China are mainly anti-friction additives, which are difficult to compare with foreign countries in terms of variety and performance; in addition, there are not many synthetic lubricants widely accepted by users, and the main domestic anti-friction additives are mainly containing Additives of active elements such as sulfur and phosphorus or modified graphite solid additives still lack efficient synthetic lubricants like TorqTrim (fatty acid triglycerides). issues that need resolving