Lubricant for drilling fluid and preparation method thereof

Abstract

The invention discloses lubricant for drilling fluid and a preparation method thereof. The method comprises the steps as follows: firstly adding 70 to 90 parts of solid graphite into a crusher, ensuring that the solid graphite is machined into 200 mesh graphite fine powder, then shifting the graphite fine powder into a container with a stirrer, stirring and adding 10 to 30 parts of nonyl phenol ether into the container, ensuring that the nonyl phenol ether and the graphite fine powder are sufficiently mixed, and finally performing weighing and packaging through a packaging machine. After being added into drilling fluid, the lubricant can form a layer of firm adsorption film on surfaces of a drill, a drilling tool and other tools, can greatly reduce the wear of the drilling toll during the drilling process, does not has fluorescence, and does not interfere geological logging.

Description

technical field [0001] The invention relates to a lubricant and a preparation method thereof, in particular to a lubricant for drilling fluid and a preparation method thereof. Background technique [0002] With the continuous expansion of China's oil exploration field, the strata encountered by drilling have become increasingly complex. In the process of oil drilling, it is often necessary to use a large amount of drilling fluid lubricant to reduce the friction between the well wall and the drilling tool, the drilling tool and the casing, reduce the complexity of the downhole, and improve the drilling speed. Although in recent years, drilling fluid lubrication Great progress has been made in the research of drilling fluid, but there are still some problems: such as foaming of drilling fluid, increase of drilling fluid viscosity and shear force, which is not conducive to the maintenance and treatment of drilling fluid performance on site; poor lubrication performance, low ext...

AI Technical Summary

Problems solved by technology

In the process of oil drilling, it is often necessary to use a large amount of drilling fluid lubricants to reduce the friction between the well wall and the drilling tool, the drilling tool and the casing, reduce downhole complexity, and increase the drilling speed. Although in recent years, drilling fluid lubrication Great progress has been made in the research of drilling fluid, but there are still some problems: such as causing drilling fluid foaming, drilling fluid viscosity and shear force increase, which is not conducive to the maintenance and treatment of drilling fluid performance on site; poor lubricating performance, low extreme pressure film strength, Difficult to biodegrade, oily drilling cuttings and waste drilling fluids cause serious pollution to the environment and can only be used in general shallow vertical wells, especially in offshore drilling where environmental protection requirements are getting higher and higher, especially in recent years for horizontal wells, directional wells and super Deep wells have higher and higher requirements for drilling fluid, and it is necessary to use a finer screen to filter circulating drilling fluid to improve the performance of drilling fluid. It is very necessary to develop a lubricant for drilling fluid that can meet the requirements of deep well operations and reduce production costs.

[0003] In view of the technical requirements in the CM01948677 B patent, it can only be used in general shallow vertical wells. If it is used in complex wells such as highly deviated wells and horizontal wells, it will be filtered through a finer screen because of the large particle size. out, thereby reducing the content of graphite lubricant in the drilling fluid, thereby reducing the lubricating performance of the drilling fluid, it is necessary to re-add a large amount of graphite lubricant to achieve the desired effect, thereby increasing the production cost

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