FS Training( general) Flashcards
Three key steps of mud removal
- Hole cleaning
- Conditioning
- Displace mud from the annulus
Five techniques which improve mud removal
- Casing movement
- Washers, spacers
- Centralization
- Scratcher
- Wiper plugs
What might happen if a bottom plug is not used in a primary cement job
no casing clean up
Comparing the narrow side of the eccentric annuli the wider side of annulus h…
Higher fluid velocity and higher Reynolds number
Spacers are weighed to increase mud removal efficiency and…
Maintain overbalance against the pore pressure
SLB recommended CSG standoff value
75%
What is the D-code for chemical wash concentrate
D122A
When designing a cement job your first option for flow regime will be
Turbulent flow
% diff btw fluids when considering the density differential to com…
10%
% diff btw fluids when considering the friction hierarchy to com
20%
Which criteria ensures circulation of the mud all around the casing while conditioning the mud
minimum pressure gradient
Which criteria will yield the min rate for effective laminar flow
minimum pressure gradient
Why should the drilling fluid be circulated and conditioned before the cement job (all of above)
To clear any entrained gas
To reduce the circulating temperature
To adjust rheology of the mud and break the gel strength
To clean cuttings
What are the magic numbers for CemCRETE blend design
55 Course 35 Medium 10 Fine
What is solid fraction
Ratio between solids and fluids
What is packing volume fraction
ratio between dry additives of blend
The following are members of the CEMCRETE family
Ultra LiteCrete, LiteCrete, LiteCrete HP, DensCrete, FlexStone, DuroStone, SqueezeCrete
Can open hole caliper data and directional data be imported into CEMCADE
yes
What is CemCADE
Cementing Computer Aided Design & Evaluation
What function could you use to confirm if there are any errors in cemcade
consistency check
