DRILLING THEORY Principles of percussive drilling In percussive drilling‚ the energy required to break the rock is generated by a pneumatic or hydraulic rock drill. Machines of this kind build up a pressure which‚ on being released‚ drives the piston forward (Fig. 1). The piston strikes on the shank adaptor. The kinetic energy of the piston is converted into a stress wave which travels along the drill string to the rock. In order to obtain the best possible drilling economy the whole
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DRILLING FLUIDS The key to making the rotary drilling system work is the ability to circulate a fluid continuously down through the drill pipe‚ out through the bit nozzles and back to the surface. The drilling fluid can be air‚ foam (a combination of air and liquid or a liquid. Liquid drilling fluids are commonly called drilling mud. All drilling fluids‚ especially drilling mud‚ can have a wide range of chemical and physical properties. These properties are specifically designed for
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ENC 1011 Birth Control in American Society The Pros and Cons “On May 9‚ 1960‚ the Food and Drug Administration (FDA) approved the marketing of the first birth control pill in the United States.” The battle over birth control waged on long before F.D.A’s approval. Since its creation‚ arguments both pro and anti birth control have been immense. From religious beliefs to freedom of choice‚ both sides still have yet to find a middle ground on this matter. Whether negative or positive‚ birth control
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PROS AND CONS English Comp 1 7/17/2014 Firearms‚ are they good‚ or are they a safety hazard to everyone in this world? Are they so dangerous that no one should be allowed to own them or are they so necessary that we can’t live without them? Are we to strict on the laws involving firearms? This argument has been going on for many years. Controversial‚ of course. Beneficial lifesaver‚ definitely. Easy to control‚ no way. Guns are useful. Every day‚ they are responsible for killing
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Oil Drilling Have you ever seen an animal covered in sludge‚ helpless and weak? Offshore oil drilling is one of our world’s biggest concerns. Offshore oil drilling is the discovery of finding oil or gasoline resources underwater. Usually the oil is found off the coasts of each continent and can also be found in lakes and small seas. Drilling for oil provides the energy to make fuels for cars and other machinery. Many different platforms can be used for offshore oil drilling such as drill ships
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replacing pipe from the well when it is necessary to change the bit or other piece of the drill string‚ or when preparing to run certain tests in the well bore. • Top drive o A mechanical device on a drilling rig that provides clockwise torque to the drill string to facilitate the process of drilling a borehole. • Kelly hose o is a flexible‚ steel reinforced‚ high pressure hose that connects the standpipe to the kelly. • Goose neck o A thick metal elbow connected to the swivel and standpipe
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According to Green garage‚ there are many pros and cons of fracking. The pros are that if any shortages are reached in oil or gas‚ fracking can help solve the problem by going deeper into the ground and releasing more than what would normally be obtainable. Another pro‚ is that air toxicity is reduced. In fracking‚ the water and other chemicals are injected down into the ground in cracks in the rock and it then enlarges the crack‚ allowing more gas or oil to be released thus not contaminating the
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is either harmful‚ or useful to our nation. There are numerous arguments for both sides that specify pros and cons for fracking and if fracking should be legal to operate. Fracking is known as hydraulic fracturing with the use of sand‚ water‚ and chemicals that are injected at high pressures to blast open shale rock and release the trapped gas inside. The process of fracking starts with drilling a hole deep in the earth’s surface until it reaches natural gas. From there they can start the operation
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Running head OUTSOURCING INFORMATION TECHNOLOGY OFFSHORE The Impact of Outsourcing Information Technology Offshore Strayer University Abstract This study explores Offshore IT Outsourcing by U. S. companies. Within the study‚ information will be provided on the details of Offshore IT Outsourcing including the advantages and disadvantages. It also evaluates different strategies for offshore Information Technology Outsourcing that could benefit both U. S. employees and employers. This study utilized
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Susan McCormick PLSC323 The Pros and Cons of Globalization Starting out‚ I would first like to define globalization. It is” The worldwide movement toward economic‚ financial ‚trade‚ and communications integration. Globalization implies the opening of local and nationalistic perspectives to a broader outlook of an
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