Can anyone provide me an educated guess about Conductor Pipe size, In the environment of 10m to 26m which Pipe size would be appropriate to use.
1) 24" external Dia - 1" wall thickness?? Or
2) 26" Ext Dia0 2" wall thickness??
We are in the process of performing the Geotechnical study of the soil
Casing design has
24"x185/8"x135/8x103/4x75/8- Well TD @ 16000ft.
Of if possible can anyone share the procedure to evaluate the designing forces to be applied for this Conductor Pipe Design.
As in what kind of Data is required to be analyzed to decide the size and wall thick ness of the Conductor pipe.
Appreciate your help
Conductor design is driven by following:
Onshore or Offshore ?
Driven or drilled & cemented?
Welded or Threaded connectors
Well is expendable or potentially a Keeper? (with MLS capability) or production batch drill ?
Anticipated life of well vs fatigue analysis (above refers)
Water depth, quality of formation below mud line. are there expected to be losses in highly permeable formations that may be present below mud line ? or communication concerns between conductors in the instance of batch drill campaign ?
Typically Conductors with WT< 0.750" are drilled and cemented. if operator is considering driving conductor to setting depth then WT > 0.750" should be used in order to facilitate driving particularly of the shoe depth is > 45 m below mud line and prolonged hard driving is expected.
If there is a spud can penetration report for an offshore vocation this will typically contain Geotech info to perhaps 35 meters below mud line, from this one can gain an insight in the seafloor conditions immediately below the mud line. and using offset data for the local area if available, a fairly coherent impression of the conductor installation requirements can be determined.