Anti-galling thread grease and method of using the same

Abstract

The invention discloses an anti-galling thread grease, which includes component A, component B and component C, and the mass ratio of the three components is A:B:C=(0.8-1.1):(1.6-2.2): (3.6-4.2); in terms of mass percentage, component A includes 30%-50% of polyamide curing agent, 50%-70% of n-hexane; component B includes 47%-60% of epoxy resin, and 5% of nickel powder ~15%, tungsten disulfide powder 30%~40%, silicon nitride 1%~4%, fumed silica 1%~3%; component C includes titanium base grease 30%~50%, microcrystalline graphite 3%~7%, silicon carbide whisker 7%~13%, graphite powder 15%~23%, PTFE powder 13%~18%, nickel titanium alloy 1%~4%, zinc powder 10%~15% %. When using, first apply component B to the thread surface, and then apply component A to the thread surface painted by component B, the two will undergo a chemical curing reaction, forming a layer of lubricating coating on the thread surface. The coating has the advantage of strong surface adhesion, and then a layer of oil-based grease lubricating substance is applied on the surface of the lubricating coating to play the role of the oil-based grease lubricating material to physically block the thread leakage gap and spread it on the thread surface. The advantages.

Description

technical field [0001] The invention belongs to the technical field of oil casing thread grease, and particularly relates to an anti-sticking thread grease and a method for using the same. Background technique [0002] With the continuous development of oil and gas exploration and development, a large number of inclined wells, horizontal wells, extended-reach cluster wells, deep and ultra-deep wells, and gas storage wells have appeared in oilfield drilling. In the process of well construction, various factors such as complex formation conditions, harsh new drilling and completion conditions, imperfect pipe string design standards, improper casing material selection, unreasonable construction techniques and other factors may cause casing damage; Even if the casing meets the strength design requirements, the pipe string may be damaged due to thread leakage, pipe string corrosion or pipe string wear, and may also be caused by the load in all directions (tensile load, external e...

AI Technical Summary

Problems solved by technology

[0005] Although the currently used oil-based grease thread grease has a certain anti-sticking effect, there are still certain defects and deficiencies. The reason why the existing oil-based grease thread grease plays an anti-sticking effect is that the soft metal contained is Rolling and spreading on the thread surface, but because the formulas of various thread grease manufacturers vary widely, each pipe factory cannot guarantee that the oil-based thread grease can be effectively processed due to differences in processing technology, quality control, and buckle design when processing threads. Spread on the thread surface, some thread grease will be squeezed out of the thread surface with the make-up of the thread due to poor adhesion on the thread surface, which will result in failure to lubricate, and eventually lead to a large amount of sticking of the oil casing thread failure accident

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