Can water-soluble potassium formate be used to increase drilling fluid density?

When drilling deep wells, the treatment of high density drilling fluid becomes more complex because of the high bottom hole temperature, which affects the normal operation of drilling, and may even cause serious downhole complex accidents. Drilling fluids with good water solubility will be purchased to increase the density of drilling fluids. A set of potassium formate drilling fluids with a density of 2.62g/cm3 can meet the requirements of high temperature and high pressure drilling environment.

Potassium formate drilling fluid has the following advantages:
1. Good solubility, high density, low solid phase and low viscosity.
2. Good compatibility. Compatible with most conventional oilfield polymers.
3. Strong inhibition, regular borehole and good lubricity.
4. Solid-free or low-solid, low viscosity and high initial filtration loss of organic salts greatly increase the penetration rate.
5. Environmental performance is non-toxic, harmless and biodegradable, which can meet the increasingly stringent environmental requirements.
6. Small corrosion. The corrosion rate of drilling tools, rubber fittings and drilling equipment is low.
7. Stable performance, high temperature resistance.
8. Reduce the formation temperature of gas hydrate.

In order to meet the requirements of drilling engineering and improve the performance of drilling fluids, it is necessary to add additives to various drilling fluids. Some experimental studies have shown that potassium formate drilling fluid system is widely used in drilling fluid because of its strong inhibition, stable borehole wall, lubrication and anti-sticking, anti-soluble salt pollution, and good rheological properties.

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