Hole cleaning is a hydraulics problem with a mechanical component. In vertical hole, cuttings slip against upward flow and the annular velocity has to exceed the slip velocity. Above about thirty degrees, cuttings settle onto the low side and form beds that annular velocity alone will not remove, which is why pipe rotation becomes essential in deviated and horizontal sections.

Equivalent circulating density is the other output that matters. Annular pressure losses add to the static mud weight, so the formation sees more pressure while circulating than when static. In narrow margin wells that difference decides whether the section can be drilled without losses, and it rises with flow rate, cuttings loading and rheology, which puts hole cleaning and losses in direct tension.

The practical skill is balancing these. More flow cleans better but raises equivalent circulating density and pressure losses; thicker mud suspends better but increases pressure losses and may not clean beds; rotation helps cleaning but has its own limits. This course gives the calculations and the judgement to find the workable combination.

By the end of this training, participants will be able to:

• Apply rheological models to hydraulics calculations.
• Calculate circulating pressure losses through the entire system.
• Calculate bit hydraulics, hydraulic horsepower and impact force.
• Optimise nozzle selection for the drilling objective.
• Calculate equivalent circulating density and assess its effect on the pressure window.
• Explain cuttings transport mechanisms in vertical, deviated and horizontal hole.
• Determine flow rate, rotation and rheology requirements for hole cleaning.
• Calculate surge and swab pressures and set tripping speed limits.
• Apply hydraulics to riser, dual gradient and special applications.
• Monitor hydraulics at the rig and troubleshoot hole cleaning problems.

The course is instructor-led and calculation-based. Participants work through complete hydraulics calculations for real wells, including pressure losses, equivalent circulating density, nozzle optimisation and hole cleaning requirements. Field data is used to compare predicted and measured pressures. Participants are encouraged to bring their own well data for discussion.

Organisations sending participants to this training will:

• Improve hole cleaning and reduce stuck pipe and pack-off incidents.
• Manage equivalent circulating density in narrow margin wells.
• Improve rate of penetration through better bit hydraulics.
• Reduce losses caused by excessive circulating pressure.
• Improve hydraulics planning and monitoring practice.

Participants will:

• Be able to calculate drilling hydraulics from first principles.
• Be able to optimise nozzles and bit hydraulics.
• Understand cuttings transport and hole cleaning requirements.
• Be able to calculate surge and swab and set trip speeds.
• Be able to diagnose hole cleaning problems at the rig.

• Drilling engineers
• Rig site supervisors and company representatives
• Drilling fluids engineers
• Drillers and senior rig crew
• Service company engineers supporting drilling
• Graduate engineers in drilling roles

Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.

Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.