Drilling Basics
What is the term for the hollow tube used to keep the borehole open after drilling?
What is casing?
The underground layer where water is stored and extracted through wells.
What is an aquifer?
This piece of safety equipment is essential for eye protection during drilling.
What are safety goggles or glasses? Will accept Bombers
The amount of water in gallons pumped over 60 seconds
What is GPM, or Gallons Per Minute?
This government agency oversees water well construction and permitting in Hawaii.
What is CWRM, Commission on water resource management, DLNR?
This is used to rotate the drill string and bit at the surface.
What is a rotary table or top head or drill rig?
The term for water that is safe and suitable for drinking.
What is potable water?
The name of the document that provides information on hazardous chemicals used on-site.
What is a Safety Data Sheet (SDS)?
If a well is drilled at 200 feet with a flow rate of 10 gallons per minute, how many gallons of water per hour?
What is 600 gallons?
The guidelines providing standards for well construction and pump installation in Hawaii.
Hawaii Well Standards
The term for borehole drilled deeper than the target depth. Approx. 5-10 feet
What is Rat hole?
This is a well where water flows from the ground to the surface naturally.
What is artesianwell?
Before using any equipment on-site, it’s essential to complete this step to ensure it’s safe to operate.
What is an equipment inspection (or pre-use check)?
The formula to convert inches to feet, often used in drilling measurements.
What is dividing by 12?
This the the space between the Casing and the Borehole.
What is annulus?
This is used to keep the borehole clean, and remove drill cuttings?
What is Soap, Drill Foam, or Mud?
The measure of the ability of a rock to transmit water.
What is permeability?
These devices are installed on rigs and equipment to quickly cut off power in an emergency.
What are emergency stop buttons (or E-stops)?
This formula is used to calculate what?
GPM x TDH/3960/75%
What is required HP?
This measurement is used to determine the impact on the well while pumping.
What is Drawdown?
In well drilling, this is the angle deviation from a vertical line.
What is the well inclination?
The percentage of open space in a rock or sediment, determining how much water it can hold.
What is porosity?
Who can stop the job due to safety concerns?
Who is ANYONE?
This calculation determines how long it takes to drill 1 foot if you’re drilling at a rate of 20 feet per hour.
What is 3 minutes?
This is the allotted amount of water an aquifer can produce.
Sustainable Yield.