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Tackifier for drilling fluid and preparation method thereof,Plugging agent with characteristic of controlled and delayed expansion, and preparation method thereof

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Salt sensitivity is a measure of how your blood pressure responds to salt intake. People are either salt-sensitive or salt-resistant. Those who are sensitive to salt are more likely to have high blood pressure than those who are resistant to salt.

Tackifier for drilling fluid and preparation method thereof

ActiveCN104311730AImproved rock carrying capacityThe preparation method is simple and feasibleDrilling compositionCross-linkSalt resistance

The invention relates to a tackifier for drilling fluid and a preparation method thereof, and belongs to the technical field of synthesis of processing agents for oil-field drilling fluids. The tackifier is a net-like polymer obtained by mixing acrylamide, a sulfo-group-containing monomer A and a pyrrolidone monomer B according to the mass ratio of 10:(3-5):(0.7-1.5), adjusting the pH value of the solution, adding a cross-linking agent C, a molecular-weight adjusting agent D and an initiator and performing copolymerization crosslinking. The preparation method is simple and practicable, and short in reaction time. The obtained tackifier has good salt resistance, has the temperature resistance up to 135 DEG C, has good effects of increasing shear viscosity and reducing filter loss when being applied to drilling fluids, is capable of substantially improving the cutting carrying capability of the drilling fluids under the condition of high temperature, has the effect obviously better than a tackifier normally used on site, is widely applicable to fresh-water drilling fluids and saturated brine drilling fluids, and has relatively good application prospect.

Owner:CHINA PETROCHEMICAL CORP +1

Plugging agent with characteristic of controlled and delayed expansion, and preparation method thereof

InactiveCN109666467AHigh temperature resistanceImprove salt toleranceDrilling compositionSalt resistanceAlcohol

The invention relates to a plugging aid for the oil field drilling field, particularly to a plugging aid capable of controlling the expansion time of a plugging material, inhibiting the water swellingspeed and improving the success rate of the expansion plugging material construction, wherein the plugging aid comprises 5-10 parts of a water swelling resin, 15-80 parts of an alcohol-based modifier, and 0.05-0.4 part of a solid acid catalyst. According to the present invention, the plugging aid can resist a temperature of 150 DEG C so as to significantly improve the temperature resistance and the salt resistance of the plugging agent; and at a room temperature, the plugging aid hardly expands in water, the water swelling speed of the plugging aid is increased along with the increase of thewater temperature so as to achieve the significant delayed expansion characteristic, and the plugging aid slowly expands in the rockshaft, and can continuously expand after reaches the leakage layer so as to effectively improve the leakage stratum and achieve the repair effect.

Plugging agent with characteristic of controlled and delayed expansion, and preparation method thereof

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Owner:CHINA PETROLEUM & CHEM CORP +1

2 results about "Salt resistance" patented technology

Tackifier for drilling fluid and preparation method thereof

Plugging agent with characteristic of controlled and delayed expansion, and preparation method thereof

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