NGWA GENERAL DRILLING COMPREHENSIVE EXAM
2025/2026 QUESTIONS WITH SOLUTIONS GRADED A+
✔✔The following drill rig is the least acceptable to drill through a consolidated shale in
sandstone formation... - ✔✔... a bucket rig.
✔✔(T/F) Cable tool rigs are advantageous for the following reasons:
1. Straightness of well.
2. Minimum maintenance.
3. Economical Use. - ✔✔True.
✔✔(T/F) Drilling mud viscosity can be accurately estimated by visual inspection. -
✔✔False.
✔✔Chain and drive shaft guards... - ✔✔... should be kept in place.
✔✔In performing adjusts to components that are driven by clutches and/or drive shafts,
you must... - ✔✔... shut unit down and lock out before adjustments are made.
✔✔(T/F) A drilling fluid should do all of the following:
1. Cool the bit.
2. Promote longevity.
3. Remove cuttings from the bit surface.
4. Transport cuttings to the surface.
5. Plug lost circulation zones.
6. Promote hole stability. - ✔✔True.
✔✔A good preventative maintenance program will create... - ✔✔... operators who have
a thorough understanding of equipment.
✔✔Drilling rigs should be fueled... - ✔✔... in the morning before starting the drill.
✔✔Drill rig or pump hoist engines should not be started unless... - ✔✔... clutches are
disengaged and gears are in neutral.
✔✔Drilling mud should... - ✔✔... be specially designed to meet the specific conditions
for each well.
✔✔What is/are the main cause(s) of wear and breakage on wire rope? -
✔✔Overloading, violent jerking, and kinking.
✔✔To properly construct a large column screen well, one should take one of the
following steps. - ✔✔Sample analysis.
2025/2026 QUESTIONS WITH SOLUTIONS GRADED A+
✔✔The following drill rig is the least acceptable to drill through a consolidated shale in
sandstone formation... - ✔✔... a bucket rig.
✔✔(T/F) Cable tool rigs are advantageous for the following reasons:
1. Straightness of well.
2. Minimum maintenance.
3. Economical Use. - ✔✔True.
✔✔(T/F) Drilling mud viscosity can be accurately estimated by visual inspection. -
✔✔False.
✔✔Chain and drive shaft guards... - ✔✔... should be kept in place.
✔✔In performing adjusts to components that are driven by clutches and/or drive shafts,
you must... - ✔✔... shut unit down and lock out before adjustments are made.
✔✔(T/F) A drilling fluid should do all of the following:
1. Cool the bit.
2. Promote longevity.
3. Remove cuttings from the bit surface.
4. Transport cuttings to the surface.
5. Plug lost circulation zones.
6. Promote hole stability. - ✔✔True.
✔✔A good preventative maintenance program will create... - ✔✔... operators who have
a thorough understanding of equipment.
✔✔Drilling rigs should be fueled... - ✔✔... in the morning before starting the drill.
✔✔Drill rig or pump hoist engines should not be started unless... - ✔✔... clutches are
disengaged and gears are in neutral.
✔✔Drilling mud should... - ✔✔... be specially designed to meet the specific conditions
for each well.
✔✔What is/are the main cause(s) of wear and breakage on wire rope? -
✔✔Overloading, violent jerking, and kinking.
✔✔To properly construct a large column screen well, one should take one of the
following steps. - ✔✔Sample analysis.
