NGWA
What are some advantages and/or disadvantages of the top head and table drive system? - Answer-Top
head drive:
Advantages: Direct torque, better control, less drill string wear.
Disadvantages: More expensive, complex maintenance.
Table Drive:
Advantages: Simpler, lower cost.
Disadvantages: Less control, higher drill string wear.
Why is it important to keep the bit in gauge? - Answer-Ensures proper hole diameter, prevents well
collapse, and maintains drilling efficiency.
How is the DHH drill bit sharpened? - Answer-By grinding the worn or rounded edges of the bit's cutting
surfaces, usually with specialized grinding tools.
How could a crooked hole be corrected using air rotary? - Answer-using stabilizers, reducing weight on
the bit, and adjusting the drilling angle.
Explain various methods for setting casing using air rotary equipment. - Answer-Driving: Use a hammer
or rig to drive the casing down.
Rotating: Rotate the casing into place using the drill rig.
Pushing: Use the rig's hydraulic system to push the casing down.
What are some advantages and/or disadvantages of the top head and table drive system? - Answer-Top
head drive:
Advantages: Direct torque, better control, less drill string wear.
Disadvantages: More expensive, complex maintenance.
Table Drive:
Advantages: Simpler, lower cost.
Disadvantages: Less control, higher drill string wear.
Why is it important to keep the bit in gauge? - Answer-Ensures proper hole diameter, prevents well
collapse, and maintains drilling efficiency.
How is the DHH drill bit sharpened? - Answer-By grinding the worn or rounded edges of the bit's cutting
surfaces, usually with specialized grinding tools.
How could a crooked hole be corrected using air rotary? - Answer-using stabilizers, reducing weight on
the bit, and adjusting the drilling angle.
Explain various methods for setting casing using air rotary equipment. - Answer-Driving: Use a hammer
or rig to drive the casing down.
Rotating: Rotate the casing into place using the drill rig.
Pushing: Use the rig's hydraulic system to push the casing down.
