⚒ BASIC CONCEPTS OF DRILLING ⚒
? The most effective, and hence most usually adopted, method of destruction of an the object is by blasting.
? This method invariably aims at breaking the object into several small pieces.
? Explosives are used for the purpose of breaking the object.
? An explosive is a substance that generates a very high volume of gases and a huge quantity of heat within a very short time span of a few milliseconds as soon as it is ignited.
? When gases are generated by ignition in this way, very high pressure is exerted
on the surroundings.
? At the same time, the strength of the surrounding material also reduces considerably due to the heat.
? As a result of this, cracks develop in the material and the material gets fragmented.
? When the place of generation of gases is confined, the gases cannot escape to the atmosphere and the intensity of the pressure increases to a considerably higher level.
? This results in maximum destruction.
For the most effective destruction of surrounding material, a hole is drilled in the material to be destroyed. After completion of drilling, the hole is charged (i.e. filled with explosive material) in a certain predefined manner.
? A detonator, connected by two copper wires, is kept in the hole while the explosive is filled. The hole is then sealed from the top.
?Once the appropriateness of all the precautionary measures is verified, an electric current is sent through the wires.
?The electric current heats the wire in the detonator and the explosive material in the detonator explodes.
?This explosion causes further detonation in the explosive-filled hole. The hole drilled for filling explosives in this manner is called a blast hole.
? The process of drilling such holes is called blasthole drilling.
? The process of drilling such holes is called blast-hole drilling.r often simply a drill.
? Except cases like breaking a boulder in field etc., a blasthole is seldom drilled in the singular.
? They are drilled in numbers, perhaps in hundreds, one after another, then charged and blasted simultaneously.
? The fragmented rock mass formed by blasting is almost always moved away, either to create space, as in civil engineering projects, or to extract a mineral of interest, as in mining or quarrying.
? If the sizes of the fragments are small they can be moved easily.
? In order to have a small size rock fragments after a blast, blast holes are required to be located in a properly planned manner.
?This requires careful design to determine the diameter, depth, and inclination of the holes, and also layout and other relevant parameters of the holes.
Drilling is the process of making a hole or tunnel into the ground, typically by using a rotary drilling rig. The basic concept of drilling involves the use of a drill bit, which is a device that cuts or chips away at the rock or soil as it is rotated at high speeds. The drill bit is attached to a drill string, which is a long, hollow pipe that is connected to the drilling rig.
As the drill string is rotated by the drilling rig, the drill bit cuts into the ground, creating a hole or tunnel. The drill string is also used to supply the drill bit with drilling fluid, which is a liquid that is used to cool and lubricate the drill bit and to remove the cuttings and debris from the hole as it is being drilled.
Drilling can be used for a variety of purposes, including the exploration and extraction of oil, natural gas, and minerals, the construction of tunnels, and the creation of wells for water or other fluids. Drilling can be performed using various types of drilling rigs, depending on the type of drilling being done and the characteristics of the ground being drilled. Some common types of drilling rigs include rotary drilling rigs, top drive drilling rigs, and drilling platforms
The basic concept of drilling is the process of creating a hole in the ground or in a solid material using a drilling rig and various types of drill bits. Drilling rigs are used in a variety of applications, including oil and gas exploration, mineral exploration, geotechnical engineering, and construction.
In the most basic sense, drilling involves using a drilling rig to apply rotational and downward force to a drill bit, which cuts into the ground or material being drilled. The drill bit is typically made of a hard, wear-resistant material, such as tungsten carbide or diamond, and it is attached to a drill stem, which is connected to the drilling rig. As the drill bit rotates, it cuts into the ground or material, creating a hole.
There are many different types of drilling rigs and drill bits that are used for different applications and in different materials. For example, rotary drilling rigs are commonly used to drill holes for oil and gas exploration, while top head drive rigs are used for geotechnical and environmental drilling. There are also specialized drilling techniques, such as directional drilling and horizontal drilling, that are used to create holes that are not straight down.
Drilling can be a complex and challenging process, and it requires specialized knowledge and equipment to be done safely and effectively. It is an important tool in many industries, as it allows for the exploration and extraction of natural resources, the construction of infrastructure, and the gathering of data for various purposes