The equipment used for borehole drilling

The equipment used for borehole drilling is mainly the drill bit, fluid column and casing. The drills for this kind of work are usually electrically powered rotary drilling machines.

The drill bit is made out of tungsten carbide. A pump feeds the fluid column which consists mainly of water and a small amount of air to keep it from turning into bubbles. It prevents collapsing as well as lubricating the bit. The casing usually starts at about 2 meters long but can be left to run for as long as needed depending on the depth of the drill.

The drill bit is made from high compression alloy steel which has been heat treated and tempered to a perfect hardness for drilling through rock formations. It works by rotating at a very high speed while being pressed against the wall of the hole, this causes resistance on itself and eventually penetration into the rock formation. After penetrating, the drill bit then works to expand the hole by causing fragments of rock or soil to break away from the walls. The fluid column is necessary for this type of drilling because it prevents any collapse when drilling through loose soils and carries away cuttings from inside the drill pipe. It also helps cool down the drills cutting edge and keeps lubrication on it. Casing is used to prevent the collapse of a hole and to provide a smooth, round inside surface. It also aids in protecting the drill bit from outside impacts.

Discuss the equipment

Drilling machines are equipped with different kinds of bits for different settings such as rock drilling, soft soil drilling or coalbed methane development. The rock bits are made out of diamond and hard alloy steel. The soft soil bits can be used for all kinds of soils such as clay, silt, shale and sand while the coalbed bits are only effective on gas-bearing coals.

The drill bit is used to break through the earth’s crust and collects information about the subsurface formation. The process of extracting samples and information from the subsurface is called geotechnical drilling. Drilling machines are mainly used for this purpose as they can drill deep into very hard surfaces such as rock or solid mode, clay and other soft sediments.

The equipment used for soil investigation includes a post-hole auger, soil auger and earth sampling tool. The post-hole auger is used for digging holes in loose to medium dense soils. It works by rotating the bit which causes the cutting edge to rip the soil apart by drawing it downwards into the hole. Post-holes are usually bored about 1 meter deep but can be as deep as 3 meters.

The soil auger is used most often than not and can be used for all kinds of soils, the only difference will be in the drill bits which vary depending on whether it’s intended to go through rock or place poles. The depth limit of this tool varies from 2 meters to 6 meters.

Lastly, the earth sampling tool which does not use a rotating bit is used for sampling all kinds of soil types. It works by using a pointed tip to penetrate the surface and then closing up on it’s own accord. The tool is designed in such a way that when full it can be opened and closed very easily so as to empty out the sample without taking apart the whole unit.

Conclusion

Drilling machines are equipped with different kinds of bits for different settings such as rock drilling, soft soil drilling or coalbed methane development. The rock bits are made out of diamond and hard alloy steel. The soft soil bits can be used for all kinds of soils such as clay, silt, shale and sand while the coalbed bits are only effective on gas-bearing coals. Drilling machines are mainly used for this purpose as they can drill deep into very hard surfaces such as rock or solid mode, clay and other soft sediments.