Impact of drilling fluid performance on PDC bit drilling speed

The impact of drilling fluid performance on PDC bit drilling speed is complex, as the various properties of drilling fluids are closely related and changing one property can lead to corresponding changes in other properties. Therefore, it is difficult to evaluate the specific impact of a certain drilling fluid property on drilling speed.

As a professional and responsible PDC cutter manufacturer, we would like to share with you that numerous experimental studies have shown that drilling fluid density, viscosity, water loss, solid content, and dispersibility all have different impacts on PDC bit drilling speed.

1. Impact of drilling fluid density on PDC bit drilling speed

Increasing drilling fluid density will increase bottomhole pressure, which will lead to a corresponding decrease in PDC bit drilling speed. Although decreasing drilling fluid density can improve PDC bit drilling speed, it is limited by geological conditions and cannot be reduced arbitrarily.

2. Impact of drilling fluid viscosity on PDC bit drilling speed

Drilling fluid viscosity does not directly affect drilling speed, but it indirectly affects PDC bit drilling speed by affecting the circulating system pressure loss and bottomhole cleaning.

Under conditions of constant surface power, reducing drilling fluid viscosity can lower circulating system pressure loss, increase PDC bit pressure drop, and correspondingly increase PDC bit drilling speed.

3. Impact of drilling fluid solid content and dispersibility on PDC bit drilling speed

   
   

Practical experience has shown that drilling fluid solid content has a significant impact on PDC bit drilling speed, so solid content must be strictly controlled. Not only does solid content affect speed, but the dispersion of solid particles also has an impact on drilling speed. And if you have interest, we also have drill bits for water well drilling.

Experimental results have shown that the greater the amount of solid particles less than 1 micron in drilling fluid, the greater the impact on PDC bit drilling speed. When the solid content is the same, the drilling speed of dispersed drilling fluid is lower than that of non-dispersed drilling fluid. The smaller the solid content, the greater the difference between the two. To improve PDC bit speed, it is advisable to use low solid content and non-dispersed drilling fluids.

In addition, factors such as drilling fluid water loss also have some impact on PDC bit drilling speed. However, these properties are related to drilling fluid viscosity, solid content, and dispersibility, and increasing drilling fluid water loss often increases drilling fluid viscosity, making it difficult to determine their independent impact on PDC bit drilling speed.

Similar to tci tricone drill bits,Drilling practice has shown that drilling fluid performance is a crucial factor in determining PDC bit drilling speed. However, drilling fluid performance is often influenced by downhole working conditions, making it difficult to control strictly. Therefore, to identify objective criteria for optimizing drilling fluid performance, further research is required to address this important issue in selecting drilling parameters.

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Tricone bits, PDC cutters, PDC reamers, Well drill bit, Drill bits for oil and gas industry, etc. Contact us for more information.