HPHT wells are extremely expensive (and often carry high risk) and therefore must reach their objectives without cost over-run or incident (such as a loss of well integrity, a failed wellhead, worn casing, “flipped” mud or failing MWD / LWD tools for example).
In order to drill HPHT wells successfully many specific drilling operations and procedures are employed which are quite different to those used for standard wells. If not employed, it’s easy to get into trouble. The ultimate question is, what’s the root cause of the problem(s)?
This course seeks to address the root causes of the problems we typically see on HPHT wells – hence the term “Troubleshooting” – so that things can be put right to allow for the resumption of successful drilling.
To maximise learning, a wide range of HPHT Case Histories are also presented with delegates working through certain situations, as teams, to identify and solve HPHT problems. Presentation material is through the use of Manuals, PowerPoints, Case Histories, videos and digital film.
Duration: 5 Days
Skill Level: Intermediate
This course covers the following topics:
- The Key Characteristics & Challenges of HPHT Wells
- The Necessity for Total Teamwork
- Why HPHT Wells Fail
- The Problems of Poorly Defined Geology & Geophysics and Target Location
- Geological Hazards & Well Trajectory and Formation Collapse and Casing Wear
- Fracture Pressure, Pore Pressure & The Transition Zone
- Wellbore Instability
- Model Codes of Safe Practices – c/o The Energy Institute
- Wellhead Selection & Equipment
- Casing Considerations (including Corrosion, H2S, Setting Depths, Wear & Buckling, Metallurgy & Threads). A Design is given / discussed.
- Cementing Issues. Common Problems.
- Drilling Fluids. Common Problems. Lost Circulation. A Design is given.
- Underground Cross-Flows / Blowouts
- PWD / Drillstring Considerations.
- Testing Considerations.
- Rig Selection. Responsibility. Suspension of Operations.
- Good HPHT Practices
- Well Integrity.
- Case Histories / Q & A / Open Forum.
- Drilling Engineers / Senior Drilling Engineers, Supervisors & Superintendents
- Drilling Contractor Personnel: Assistant Drillers, Drillers, Toolpushers
- Service Company Personnel
Prerequisite: General knowledge / experience of drilling operations & well planning.