Preparation and application for green, environmentally-friendly and highly-efficient water-based drilling fluid lubricant

Abstract

The invention relates to the technical field of drilling fluids in petroleum and natural gas industries, specifically to preparation and application of a green, environmentally-friendly and highly-efficient water-based drilling fluid lubricant. The water-based drilling fluid lubricant is composed of vegetable oil, vegetable fat, lubricating colloidal particles, superfine organic molybdenum, an extreme pressure lubricant, a friction modifier, a dispersing agent and an emulsifying agent. The preparation method for the water-based drilling fluid lubricant comprises the following steps: respectively adding the superfine organic molybdenum, the extreme pressure lubricant and the friction modifier into the vegetable oil so as to obtain a first mixture; adding the emulsifying agent into the vegetable fat, and respectively adding the lubricating colloidal particles and the dispersing agent into the vegetable fat so as to obtain a second mixture; and adding the second mixture into the first mixture so as to obtain the water-based drilling fluid lubricant. The water-based drilling fluid lubricant disclosed by the invention is good in lubricating property and wear resistance, can be used forcarrying out directional lubricating and friction-reducing treatment on special parts, is easy to be biodegraded, belongs to a green and environmentally-friendly lubricant, and has good application prospect.

Description

technical field [0001] The invention relates to the technical field of drilling fluid in the petroleum and natural gas industry, in particular to the preparation and application of a green, environment-friendly and high-efficiency water-based drilling fluid lubricant. Background technique [0002] With the continuous development of petroleum exploration and development, the complex situation faced by drilling engineering has become increasingly prominent, and the number of extended-reach horizontal wells, directional wells, long open-hole deep wells, and wells with complex structures has gradually increased. Existing common lubricants include vegetable oil, mineral oil, paraffin, ethylene glycol, polyethylene glycol, etc. These lubricants have an important defect: they can only work under low loads, and under high load conditions The anti-wear and lubricating properties are not ideal, and the drill bit is often worn out in advance. Therefore, ordinary lubricants cannot meet...

AI Technical Summary

Problems solved by technology

Existing common lubricants include vegetable oil, mineral oil, paraffin, ethylene glycol, polyethylene glycol, etc. These lubricants have an important defect: they can only work under low loads, and under high load conditions The anti-wear and lubricating properties are not ideal, and the drill bit is often worn out in advance

[0004] However, after the above-mentioned common drilling fluid lubricant is added to the drilling fluid, it is evenly dispersed in the drilling fluid, and has a uniform lubrication effect on all parts of the downhole. It is impossible to carry out directional lubrication and friction reduction treatment for special parts, and, because the existing drilling fluid lubricant It has the disadvantages of high fluorescence level, not easy to biodegrade, etc., and poor environmental protection