Technical

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…

Backing off Procedures The string shot size shall be determined by the Logging Engineer so…

Formation Instability When dealing with areas of formation instability it is necessary to: – trip…

Pulling Stuck Pipe Prior to pulling stuck drill pipe or stuck casing, carry out the…