The control of solid phase is a very important link in modern drilling operations. This is because the solid phase in the drilling and completion fluids will bring many adverse effects, including reducing the drilling speed, reducing the drill bit length, increasing the wear of drilling equipment, increasing the specific gravity and viscosity of mud, thickening mud cakes, and increasing drilling fluid costs. Damage to oil and gas formations, it is precisely potassium formate such as solid-state drilling and completion fluids are developed to avoid and reduce this adverse impact.

Potassium formate drilling fluid can meet the requirements of modern drilling engineering:

(1) The content of solid phase in potassium formate drilling fluid is small, especially the content of clay is small to reduce repeated crushing.

(2) Potassium formate drilling fluid and rock have small viscosity and interfacial tension, which can improve the bottom hole cleaning ability and impact force on the rock.

(3) Potassium formate drilling fluid will increase the amount of water loss under the condition of ensuring the stability of the hole wall, especially the initial loss of water, reducing the rock powder pad at the bottom of the hole.

(4) The composition of potassium formate drilling fluid is small and a drilling fluid treatment agent is added to adjust the drilling washing ability and the impact force on the rock; in order to reduce the rock powder pad at the bottom of the hole; Other properties remain unchanged.

(5) Potassium formate drilling fluid has certain lubricity.

(6) The performance of potassium formate drilling fluid changes little under the influence of high temperature.

(7) The wall of the rock to be drilled with potassium formate drilling fluid is chemically neutral, which does not cause dispersion and expansion of the rock formation; the drilling fluid completion fluid should not damage the production layer and pollute the environment.

Potassium formate non-solid phase drilling fluid, also known as clay-free drilling fluid, is formed on the basis of low solid phase drilling fluid in order to meet the requirements of the development of modern drilling technology. Compared with traditional clay mud, the adjustable range of viscosity and rheology is large, which can meet the needs of different formations.