Carrier of active ingredient of defoaming agent and preparation method thereof

Abstract

The invention relates to a carrier of an active ingredient of a defoaming agent and a preparation method thereof. The carrier of the active ingredient of the defoaming agent is characterized by comprising the following components in part by weight: 1,000 to 2,000 parts of vegetable fatty acid and 100 to 800 parts of lower fatty alcohol. When in use, the carrier has no side effect on other performance of drilling fluid; the use amount is small; when the addition of the carrier reaches 0.2 percent, the density recovery ratio of the drilling fluid can reach over 98 percent; and the carrier is convenient to use and high in dissolving and dispersing speed and can be added into slurry directly.

Description

technical field [0001] The invention relates to a carrier of an effective component of a defoamer and a preparation method thereof. Background technique [0002] During the drilling process, if foam is generated in the drilling fluid, the density of the drilling fluid will decrease and the pressure of the fluid column will drop. If drilling encounters high-pressure oil and gas layers, it is prone to blowout accidents or the performance of drilling fluid is difficult to maintain, which is extremely unfavorable to drilling production. For example, when the gas in the formation is mixed into the drilling fluid system, the treatment agent in the drilling fluid is pyrolyzed at the bottom of the well, or when the lignosulfonate drilling fluid encounters the salt layer, foam may be generated. At this time, measures need to be taken for defoaming treatment. One of the most commonly used treatment methods is to add defoamers to the drilling fluid. [0003] At present, the defoamers...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a new carrier for the problems of poor dispersion and slow defoaming of aluminum stearate as a defoamer in water-based drilling fluids