There are many steps that are taken when a company needs to drill for oil. First, the site is suitable for the job that will need to be established, and secondly, a hole in the ground needs to be bored so that the oil can be taken.
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Once the hole, or both, has been drilled, the workers at the site have to make some decisions. Whether it will determined as redundant, or will be perceived as valuable.
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Wells are considered valuable if it would be in the correct position for pumping oil. Before the oil can be taken, however, certain settlement steps must take place. The well casing is most often the first of these steps.
A well have been drilled unstable. Therefore it is necessary to be cased to prevent it from filling again. The well casing is also a means of protection for Wellstream, preventing it from becoming blocked with sand or water.
Once the casing has been put in place, cement slurry poured into the gap that lies between the casing pipe and the wall of the well. Cement helps to get rid of the drilling fluid and holds the pipe firmly in position.
The bottom of the wells is called a reservoir, from where the oil will be taken. This area is completed either by the method of cased-hole or open-hole. Perforation is applied to the cement and casing for cased-hole completion, which is also driven right into the reservoir.
Open-hole completion method will have wells that reached only to the top of the reservoir, rather than right into it. Casing will occur in this section.