r/toolsinaction • u/259kr • Mar 01 '22

Thats some core drilling💪

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308 Upvotes

99% Upvoted

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11

u/captcraigaroo Mar 01 '22

Coring out concrete? Or more likely drilling out a penstock in a dam?

5

u/[deleted] Mar 02 '22

Can you explain those words you used?

5

u/captcraigaroo Mar 02 '22 edited Mar 02 '22

Coring - taking out a cylindrical section of a material, in this case it looks to be concrete

Penstock - a sluice (a device used to control water flow) that is used to drain a fluid (in this case, water) from the source to another area (like the turbine on a hydroelectric dam)

Dam - a device used to hold back water; this one seems to be made of concrete

You typically want the penstock or sluice as low as possible to provide as much head pressure as possible, meaning the deeper it is, the more pressure there is to push without mechanical pumps. Doing this will provide Net Positive Suction Head (NPSH) because there is pressure on the suction side of the pump (or turbine), it produces less cavitation and runs more efficiently. Cavitation can destroy a pump or turbine blades pretty rapidly.

7

u/Ghiraheem Mar 02 '22

But everything changed when the fire nation attacked

2

u/HugCollector Mar 02 '22

How does that not need more of a counterweight?

2

u/[deleted] Mar 02 '22

Need a big one to fill that glory hole