Clean lubricant for drilling fluid and preparation method thereof

Abstract

The invention relates to a clean lubricant for a drilling fluid, which serves as a drilling fluid treating agent for drilling and has the advantages of effectively cleaning a drilling tool, preventing a drill bit mud drum, reducing adhesion sticking accidents and increasing the mechanical drilling speed, and a preparation method thereof. According to the technical scheme, the clean lubricant comprises the following raw materials in percentage by mass: 40-50 percent of fatty acid, 5-15 percent of polyethylene polyamine, 20-40 percent of liquid paraffin, 3-10 percent of emulsifier and 5-10 percent of defoaming agent. The preparation method comprises the following steps of: adding fatty acid into a reaction kettle, stirring and raising the temperature to 40-50 DEG C, adding polyethylene polyamine, stirring and raising the temperature to 140-160 DEG C and undergoing a hermetic reaction for 5-8 hours; and adding liquid paraffin, sorbitan tristearate and simethicone, raising the temperatureto 80-95 DEG C, and stirring for 2-3 hours to obtain the clean lubricant with is a brown liquid. The clean lubricant has the advantages of high defoaming speed, strong foam inhibiting capability, high temperature resistance, low surface tension and small lubricating contact angle, can be used for cleaning a drilling tool, and is taken as a drilling fluid treating agent.

Description

technical field [0001] The invention relates to a cleaning lubricant for drilling fluid used in oil and gas drilling as a drilling fluid treatment agent and a preparation method. Background technique [0002] In oil and gas drilling, the problem of slow drilling speed of high-density drilling fluid in large-scale well sections and deep well sections is an urgent technical problem to be solved in domestic deep well drilling. Significant technical barriers to economic efficiency. Slow drilling speed can easily lead to complex downhole accidents and lead to reservoir pollution. Factors that affect drilling speed include drill bit structure, formation properties, drilling technology and drilling fluid technology. From the perspective of drilling fluid, the main factors affecting the drilling speed are: anti-balling performance of the drill bit and the lubricity, rheology, density, and solid content of the drilling fluid. Drilling fluid systems currently used to increase drill...

AI Technical Summary

Problems solved by technology

The use of oil-based drilling fluids is restricted due to the pollution of the environment, and the popularization of low / no solids drilling fluids is also affected by high costs. Rapid drilling drilling fluid technology is a new type of drilling fluid technology that has been studied abroad since the 1990s. It has only been studied for a few years and has not been widely promoted