Drilling fluid circulation loss is referred to as “the most severe problem in drilling of oil and
gas wells”, as a routine solution, loss circulation materials are added to fill any fractures and …

In real time drilling, the complexity of drilling fluid filtration is majorly attributed to changing
mud rheology, formation permeability, mud particle size distribution (PSD), filter cake …

Portland cement hydration is a chemically sensitive process impacted by temperature,
amount of water and the presence of any potential contaminants. Drilling fluids …

In deepwater oil and gas drilling, water-based drilling fluids (WBDFs) apparently thicken at a
low temperature (usually 4° C), causing lost circulation, high flow resistance, and leakage of …

Drilling fluids Invasion and mud filtration is a complex process that is influenced by several
variables, and has NPT (Non-Productive Time) implications. Most of these variables are …

The drilling fluid loss or lost circulation via fractures is one of the critical engineering
problems in the development of deep oil and gas resources. The conventional treatment is …

Wellbore stability has plagued oil industry for decades. Inclusion of the mud in drilling and
the effect of mud cake build up incorporate very complex chemical, thermal, mechanical, and …

Filtrate and solid invasion from drilling fluids are two key sources of formation damage, and
can result in formation permeability impairment. Typically, spurt invasion of mud solids …

A novel apparatus is used to quantify the filtration characteristics of water-based drilling
fluids and rupture behaviour of external filter cake. Under static filtration, the filtration …

Lost circulation events and mud filtration in drilling operations have been investigated over
the years because they lead to non-drilling time (NDT) and increase the overall well cost …