Low-fluorescence oil-base pipe-freeing agent and preparation method thereof

Abstract

The invention discloses a low-fluorescence oil-base pipe-freeing agent and a preparation method thereof. The invention aims at providing the pipe-freeing agent with low filtration loss, good fluidity, good pipe-freeing performance, low solidifying point, and good stability, and a preparation method thereof. The agent is composed of a pipe-freeing liquid and a rapid penetration agent. The pipe-freeing liquid comprises, by weight: 30-40% of diesel oil, 30-40% of engine oil, 4-5% of polyamide, 4-5% of organic earth, 1.5-2% of oil-soluble yellow, and 6-8% of water. The addition amount of the rapid penetration agent is 1.5-2% of the weight of the pipe-freeing liquid. When the pipe-freeing agent provided by the invention is used for treating a pipe-stuck situation, the penetration performance is high, soil cake falling speed is high, and wetting performance is good. A soaking time is commonly 1-2h. A field construction process is simple, pipe-freeing comprehensive cost is low, and pipe-stuck accident can be rapidly and effectively solved.

Description

technical field [0001] The invention relates to the field of petroleum drilling, and more specifically relates to a low-fluorescence oil-based jam-releasing agent and a preparation method thereof. Background technique [0002] During the oil drilling process, the drilling tools and drill pipes are in contact with the well wall. Due to the high friction force, sometimes downhole accidents such as drill sticking occur, which affect the smooth progress of drilling operations. In order to reduce the friction of the drill bit and the need for high temperature resistance, lubricants are often added to the drilling fluid as a sticking agent to avoid sticking accidents. [0003] The current jam release agent contains a large amount of calcium salts. Adding the jam release agent to the drilling fluid will have a great impact on the performance of the drilling fluid, such as increased fluid loss and poor fluidity. And generally, the fluidity becomes poor at 10-15°C. When the temperat...

AI Technical Summary

Problems solved by technology

[0003] The current jam release agent contains a large amount of calcium salts. Adding the jam release agent to the drilling fluid will have a great impact on the performance of the drilling fluid, such as increased fluid loss and poor fluidity.

And generally, the fluidity becomes poor at 10-15°C. When the temperature is low, it is very inconvenient for transportation and on-site use. The site needs steam heating to use, which increases the production cost.