Explicit Test Questions Flashcards
What effect does Ca have on your mud?
Calcium inhibits the ability of the mud to viscosify
What does ROP stand for?
Rate of Penetration
What does T.V.D. stand for?
True Vertical Depth
What is the equation for calculating the hydrostatic pressure in the bottom of your well?
.052(T.V.D)(Density of the Mud)
What are the units of the hydrostatic pressure and what are the units attached to the variables in the hydrostatic pressure equation?
Hydrostatic Pressure - PSI
T.V.D. - Feet
Density of the Mud - Ib/gal
Note: Pressure = .052(T.V.D.)(Density of Mud)
How many categories do the mud tests fall into and what is each category?
6 Categories The categories are: 1. Density 2. Viscosity/Rheology 3. Filtration 4. Chemistry 5. Solids Content 6. Temperature
What is the API temperature standard temperature to test mud samples?
80 degrees Celsius
What are the units associated with density?
- Ib/gal, specific gravity (a ratio of density of a given material to water), and kg/m^3
What tests are associated with Viscosity/ Rheology?
-600, 300, 6, 3, 10 second test, 10 minute test, Plastic Viscosity, Yield Point, and E.C.D
What tests are associated with Filtration?
Fluid loss and High temperature/ High pressure (HTHP test)
What tests are associated with Chemistry?
Alkalinity (pH, PM,PF, MF) Chlorides, total hardness (Ca) and Calcium specific tests
What tests are associated with Solids Content?
% Sand, % Solids, % Liquids, MBT
What piece of equipment helps determine solids content?
Retort
What are the essentials properties of drilling fluids?
- Control Subsurface Pressure
- Seal Permeable Formations
- Clean the Hole
- Stabilizing the formation
- Ensuring Maximum Hole Information
- Clean, Cool and Lubricate the drill bit and drill string
- Limit Corrosion
- Must not damage the formation
- Must not damage the environment
What is a workover?
Going into a previously sealed well or currently active well in order to re-stimulate production
How is casing and the drill string supported?
Buoyancy (displacement of mud A.K.A hydrostatic pressure)
What is a “fish”?
Anything the is in the hole that is not supposed to be there
What is the proper method for measuring the viscosity and what are its units?
Fill the cone (1500 cc) slightly above the screen and fill the cone through the screen TO the screen
It is measured in Quarts/sec
How fast should 1 quart of water run through the Marsh Funnel?
~26 seconds
How is plastic viscosity determined?
Plastic viscosity is determined by:
600 - 300 and has units of centipoise
How is the yield point determined?
Yield point is determined by 300 - PV and has units of Ib/100ft^3
What does yield point physically represent?
Resistance to initial flow or stress
What is gel strength?
Resistance to initial flow under static conditions and is measured in lb/100ft^3
What is the proper technique for determining the 10s and 10 minute gel strength?
- Turn rheometer to 600 speed for 10s
- Turn to stop and allow rotation to stop
- wait 10 seconds (or 10 minutes)
- Turn rheometer to “gel”
- Record maximum deflection shown on rheometer
What is one action that can cause Gumbo to come out of the hole?
Drilling too fast
What are factors that effect fluid loss?
Highly reactive solids that can create flocculation
What is Flocculation?
Solids from contamination process in which colloids come out of suspension and form floc or flake
What are Colloids?
microscopic dispersed insoluble particles are suspended in a solution
What are the properties represent a good filter paper?
- Firm
- Flexible
- Lubricious
- Thin
What is the thickness of a screen in the Sand % test
74 microns
What is alkalinity?
Ability of an aqueous solution to neutralize and acid
ADD Procedures for Alkalinity and hardness tests eventually
not finished yet
