As far as we know, drilling fluid possesses many functions. Now, we will talk about another one of the functions of drilling fluid:Cool, lubricate, and support the bit and drilling assembly.
solids control system
Heat is generated from mechanical and hydraulic forces at the bit and when the drill string rotates and rubs against casing and wellbore.
Cool and transfer heat away from source and lower to temperature than bottom hole.
If not, the bit, drill string and mud motors would fail more rapidly.
Lubrication based on the coefficient of friction. Oil- and synthetic-based mud generally lubricate better than water-based mud (but the latter can be improved by the addition of lubricants).
Amount of lubrication provided by drilling fluid depends on type & quantity of drill solids and weight materials + chemical composition of system.
Poor lubrication causes high torque and drag, heat checking of the drill string, but these problems are also caused by key seating, poor hole cleaning and incorrect bottom hole assemblies design.
Drilling fluids also support portion of drill-string or casing through buoyancy. Suspend in drilling fluid, buoyed by force equal to weight (or density) of mud, so reducing hook load at derrick.
Weight that derrick can support limited by mechanical capacity, increase depth so weight of drill-string and casing increase.
When running long, heavy string or casing, buoyancy possible to run casing strings whose weight exceed a rig's hook load capacity.
In order to improve the use of drilling fluid, we need the treatment equipment i.e. solids control equipment such as shale shaker, vacuum degasser, desander, desilter, centrifuge etc.
KOSUN machinery exclusively supplies oil & gas drilling fluids solids control equipment and system, safety equipment,as well as varieties of chemical agent. KOSUN has been serving the oil & gas industry for 20 years since its establishment in 1992, and has obtained good experience on equipment manufacturing & oilfield service. Any further information, you are welcome to contact us at yuan.li@adkosun.com
