The main challenge in deviated and horizontal well drilling is hole cleaning, which involves
the removal of drill cuttings and maintaining a clean borehole. Insufficient hole cleaning can …

Micron-sized sand settlement in wellbore has led to the failure of several hydrate production
tests. Therefore, research on the migration of micron-sized sand particles in hydrate …

Extended reach drilling (ERD) wells with a horizontal and highly deviated section are widely
applied in the oil and gas industry because they provide higher drainage area than vertical …

Two-stage PDC (Polycrystalline diamond compact) bit is a special drilling bit consisting of a
small-diameter pilot and a large-diameter reamer. The unique rock-breaking structure is …

Gas-in-riser events can lead to rapid unloading if not timely controlled in a proper manner.
When gas influx enters a wellbore with non-aqueous muds (NAMs), the ability of gas being …

Managed pressure drilling (MPD) offers a closed-loop circulation system in which formation
fracture pressure, bottom hole pressure, and pore pressure are considered and managed at …

Drilling with high density water-based muds invariably increases the chances of a stuck
pipe. Stuck pipe significantly increases the cost of drilling and decreases the chances of …

Although understanding the relationship between gas-liquid two-phase fluid flows and the
effects of the major drilling variables is critical to optimising underbalanced drilling (UBD) …

Two-stage PDC (Polycrystalline diamond compact) bit is a special drilling bit consisting of a
small-diameter pilot and a large-diameter reamer. The unique rock-breaking structure is …

Ensuring the integrity of the oil well is a primary objective throughout the drilling process.
Various techniques are continuously being developed and refined to achieve this goal at …