Write your own label for the drill bit
Museums don't know everything.
In 2006 was asked visitors to tell us what they knew about this object.
We asked people to write a brief label about this object: a memory, an interesting fact, something you notice, even a poem.
i personally think of this poem: roses are red violets are blue i think that this is wierd how about you.
The drill bits are used for drilling earth surfaces for oil extraction. Most common metal used for making drill bit is hardened steels. The steel undergoes many hardening and tempering processes before it is put to service depending upon its use in industry. The tungston carbide is one of the hardest material. It helps cutting hard rocks. When drilling is carried out, it generates lot of heat due to friction between the rocks and the drill. This can also erode drills. That is another reason for using hardened steels. When drilling is carried out, mud is passed through outer gap between drill and the earth surface for cooling. The mud is specially made for the purpose. The gap between Tungston carbide bits and the base metal is filled by mud and thus protect further erosion. Tungston carbide cannot be welded or stuck to drill bits. They are placed using a process called brazing.
Well !! This is just a short description.
looks like an ancient mid-evil device to break through doors of castles!
I think this is pretty cool how they found out how to drill into the earth with a certain kind of drill.
I think it looks like some sort of food.
i agree this does look like it is used to break down castle doors! i think it is funky that it has black polka dots!!haha i love eggs..mwmwmwmw
this thing is not how you'd expect a drill bit to look like. I think it looks very weird but still interesting.
its really cool
This hard rock drill bit is awesome!
this is a rotary drill bit likely first developed by the Hughes tool company the most notable member of that family would be the son: the reclusive Howard
I realize that it is a pot but I think it looks like an old fashion earthquake measurer!
weird looking container that could hold spices and herbs before they created the tupperware container!!!
Label:prehistoric tupperware
This is a hard rock drill bit. The bits on this drill turn and crush the hard rocks that they come in contact with.
i think its a racoon trap
The item in the photo is a rotary drill bit for drilling through rock, for the purpose of either exploration or production of mineral resources. The descriptor "rotary" distinguishes it from "percusive" since the two types of bits break the rock in a different fashion. The "buttons" on each of the four "cones" visible in the photo press against rock as the bit turns in the hole. The high pressure of the button pressing against the rock breaks small fragments of rock off of the bottom of the hole. (This is different from grinding, which would wear the buttons off the cones far too quickly to be useful). These rock "chips" are then "flushed" out of the hole by air or water which is delivered to the bottom of the hole under high pressure through the small holes around the perimeter of the drill bit (visible in the photo between two of the cones). The large hole in the center (ie, the hollow interior) of the drill bit is the return path for the air or water which picks up the rock chips at the bottom of the hole, and carries them to the surface (top of the hole).
It's ugl and looks like petrified excrement
This is a back massager tool used to massage the backof Henry the 8th.
I think they found crystals with it.
by Victor
This is a carbide impregnated drill bit. Used for drilling deep wells. Either for oil or natural gas deposits. The four cone design allows for taking samples of the soil it is about to encounter. Standard drill bit normaly have only three impregnated cones. These are very expensive.
reminds me of 4 chocolate chip cupcakes!
it looks like the drill bits used in the armegeddeon movie.
Looks like a cod piece for the marqui de sade.
The object is mysterious, like it could have been found at the bottom of the sea or in a fancy rock formation.
I concentrated on the hole that appears in the foreground of the object between the two front columns. I magnified the hole. It appeared man-made. Expanding this conclusion, I believe the object is a man-made formation, created and chiseled out of a rock-lock material, with the symmetrical black spots found on the top of the four columns added
by man.
WS
Northfield, MN
Wow this object rocks!!
I think that the drill bit was very cool, because it looks like a sclpture! It is VERY cool!!
It looks very strange it kind of looks like a type of wooden object.
it looks like chocolate covered raspberries on a chunk of rusty metal.
This drill bit is used to drill through hard rock. The holes you see are for water jets. These jets remove debris and cool the bit. The black bumps you see are hardened tungsten teeth to grind up the rock.
I really think it is very cool. I do not know why. It looks like cookies to me.
It is probably a good cheese grater.
This is a 4-cone, tungsten-carbide insert rock drilling bit. It is built for drilling in industrial applications in which air, mist, or fluid will be circulated to remove cuttings.
It appears from this photo that it is open in the center. This part of the bore-hole bottom is not covered by any part of the cutting structure, suggesting that it will either leave or retrieve a core of undamaged rock. This is consistent with the diameter of the body of the bit, which likely has a female thread. This will allow the bit to be attached to a hollow retrieval body with grapples to hold the core sample as it is carried to the surface.
The cones turn freely and independently of each other. Their motion is caused by the rotation of the bit on the borehole bottom. As the teeth rotate into contact with the formation, tiny fragments of rock will break away and be swept from beneath the bit by the circulating medium.
Depending on its size, which seems to be 8-12 inches in diameter, this bit may be capable of carrying drilling loads as high as 50,000 pounds. This amount of force is necessary to overcome the natural compressive strength of the rock. In certain cases, longer teeth would be used, where softer rock is anticipated. Longer teeth will enable the bit to drill faster, but are too weak to drill harder rocks.
The bearings are probably un-sealed, and would be cooled by the passage of circulating medium through the bearing. They are likely of a roller configuration, and will erode over time as they are exposed to a flow of fine particles of rock. In some designs, these rollers can be replaced to extend the life of the bit.
In use, it will be rotated in a clock-wise direction. Along the leading edges of the bit legs, there are protective elements, which will maximize the life of the bit by preventing abrasive wear of the comparatively soft steel.
Having 4 cones, this is an unconventional bit design. Most typical rock bits today incorporate a tri-cone design, which was introduced by the Hughes Tool Company many years ago.
In 2007, a drill bit of this sort can cost as much as $15,000, and may last no more than 100 drilling hours, cutting a few thousand feet. This is an older design, and is rapidly being replaced by various diamond designs, which can drill as much as 100,000 feet or more, while costing nearly $100,000.