Hole Cleaning
What are the 3 key factors for good hole cleaning in the lateral?
Pipe rotation, fluid velocity, good mud rheologies
What is Specific Gravity?
The density of a substance relative to the density of water
Veravis
Name 3 brines you would use for completions
NaCl, KCl, NaBr
Formula for YP?
300-PV
Is the heel or toe harder to clean?
Heel.
What ions make up alkalinity? (Use chemical name)
Hydroxide, Carbonate, Bicarbonate
This system is a water based drilling fluid specifically designed for shale-gas plays in NAL
Hydraglyde
What is KCOOH?
Potassium Formate.
What are the temperatures for testing the viscosity of OBM and WBM
150 and 120 degF
This behavior describes cuttings behavior in the vertical section
Hindered Settling
What is the chemical formula of Lime
Ca(OH)2
How many different mechanisms does KLA-Shield use to inhibit swelling and dispersion of clay
3
Which Brine discussed in class has the highest possible density
You run 10 sec and 10 min gel strength tests and get 8 and 17 respectively, does this mud have acceptable gel strength behavior?
We don't know, it could be progressive or fragile.
How does boycott settling affect whole cleaning in the vertical section of the well
Trick question, it doesn't.
What are the two possible net charges of clay particles?
Neutral or Negative
Does the loss of water in an invert emulsion increase or decrease the viscosity
decreases viscosity
At an increased pressure, does salt begin to fall out of solution at a higher or lower temperature
Higher temperature
A reynolds number between 2100-4100 indicates which flow regime?
Transitional
What PHAR value is the cutoff for a small pipe and large hole?
<3.25
How does temperature affect the solubility of gasses?
Increase Temperature decreases the solubility of gasses.
You are drilling the horizontal section of a well with the FLOPRO system, you have poor whole cleaning and have a relatively thin viscosity, what product do you add to improve the whole cleaning.
Flovis to increase the LSRV for better visocous coupling
Which Brine discussed in class has a pH drop as concentration increases
Zinc Bromide
What factors affect your Reynolds number?
Density, viscosity, velocity, and geometry.