Technical

Changing a Bottom Hole Assembly To avoid problems with under gauge hole and BHA changes…

Fishing Planning and Preparation When equipment has been lost or is stuck in the hole,…

Effective Pull On Stuck Pipe The first actions taken when the drillstring becomes stuck have…

Downsized conventional drilling – Slim Hole Wells Downsized conventional drilling is the use of a…

Differential Sticking (Cause of Stuck Pipe) In normal overbalanced drilling conditions, a pressure differential exists…

Drill string design (slim hole wells) Over the years a standard set of API sizes…

Back-Off Procedures Conditions for a successful back-off: a) The string shot strength should be sufficient…

Continuous coring method – Slim Hole Wells The continuous coring method is the utilisation of…

Fishing with Overshots The following guidelines should be considered when fishing with overshots: A pack-off…

Historical problems with slim hole drilling In the past small holes could not be drilled…