What is the function of drilling fluid desander

The role of drilling fluid desilter

Drilling fluid desilter is an important part of the three-stage mud purification equipment for drilling fluid, and it is often used in combination with the shale shaker. Mainly use 5-inch and 4-inch hydrocyclones, whose function is to separate solid particles in the drilling fluid with a particle size in the range of 15-47μm. Such a drilling fluid desilter is widely used in oil drilling rigs, especially suitable for various oil drilling rigs such as ZJ70, ZJ50 and ZJ40, and can be used in conjunction with a closed drilling fluid circulation system.

Here's a detailed breakdown of its functions:

Stabilization of Drilling Fluid Properties:

By efficiently eliminating harmful solid-phase particles, the desander maintains the key performance parameters of the drilling fluid, such as density, viscosity, and shear force, within stable ranges.

This stabilization enhances the rock-carrying capacity of the drilling fluid, enabling it to transport cuttings to the surface more effectively.

Additionally, it improves the lubrication performance of the drilling fluid, reducing friction between the drill string and the wellbore, thereby minimizing wear and tear on drilling equipment.

Removal of Harmful Solid-Phase Particles:

During drilling, the formation is crushed, generating a significant amount of solid-phase particles, including rock chips and sand particles.

If these particles are not promptly removed, they can degrade the performance of the drilling fluid, leading to issues such as increased viscosity, reduced flowability, and potential damage to drilling equipment.

The desander acts as a filter, accurately removing sand particles larger than 44 microns in diameter from the drilling fluid, restoring it to a cleaner state and ensuring its optimal performance.

Reduction of Waste Discharge and Environmental Protection:

By removing a large number of solid-phase particles from the drilling fluid, the desander significantly reduces the volume of waste generated during drilling operations.

This reduction in waste discharge aligns with stringent environmental protection requirements, minimizing the environmental impact of drilling activities.

Additionally, it helps drilling companies save on waste disposal costs, contributing to more sustainable and cost-effective drilling operations.

Enhancement of Drilling Efficiency and Safety:

The desander's ability to maintain the quality and functionality of the drilling fluid ensures efficient and safe drilling operations.

By preventing the accumulation of solid particles in the drilling fluid, it reduces the risk of wellbore instability, stuck pipe, and other drilling-related problems.

This, in turn, leads to improved drilling efficiency, reduced downtime, and enhanced overall operational safety.

Integration with Other Solid Control Equipment:

The desander is typically installed in the drilling fluid circulation system following the shale shaker and the degasser, but before the desilter.

It works in conjunction with other solid control equipment, such as drill fluid vibrating screens, vacuum degassers, and horizontal screw centrifuges, to form a comprehensive solid control system.

This integrated approach ensures the effective removal of solid particles of various sizes from the drilling fluid, maintaining its optimal properties throughout the drilling process.