One of the steps in dealing with oil extraction is the drilling of a well. Once drilling has been done, there is the need to have the well cased and the casing of the well requires the casing puller, also termed lift nubbin or the lifting cap. The well needs to be cased to prevent the leaking of the oil into the soil during pumping and the contamination of the oil by fluids or mud from the sides of the well.
To get to the oil, considerable amount of pressure is involved to drill beyond the lithosphere and other layers of earth and this must be factored in. The well may suffer collapse and cave in on itself, when it happens like that the oil stream is closed off, if the pressure is not constantly monitored. One way to strengthen the wall of the well is to insert big steel pipes into the bore of the well. This will in the long run prevent the well from caving in.
The pressure used in the extraction of the oil need to be watched constantly, so that the well does not collapse and cave in which will prevent the flow of oil. To sure up the walls of the well, a tube can be inserted into the drilled hole that will reduce any chance of the walls caving in.
The well's borehole can be drilled either vertically or diagonally and have steel pipes installed in it all the way to the base. The pipes are usually 40 feet long and are threaded in order to be able to be connected and form a chain or string. Each pair of pipes is then connected by what is called a collar.
Next, there is the need to consider the well's boreholes. These are drilled either diagonally or vertically and then tubular steel are installed all the way through to the base. Each piece of pipe is set to be 40 feet long and have both ends threaded, so that they can be used to create a string or chain of pipes. A collar is used to then connect a pair of pipes.
Between wall of the well and the steel pipes there is a small space. The pipes cannot be left exposed and unsupported, so they must be fixed in order to be able to stay in position over a long period of time. To set the pipes, cement is poured into the space between the wall and the pipes (annulus) and then allowed to dry.
After each stage of the drilling process casing is carried out. It therefore means that cement is also added and that the drilling is also done in stages in conjunction with the inserting and cementing of the steel. This results in having the casings uniformly matched to fit from one stage to the next.
It will become apparent while drilling if an extra case is needed. This extra case is called intermediate casing and is normally installed in the area that shows signs of deterioration caused by drilling. The intermediate casing will strengthen and stabilize the area.
To get to the oil, considerable amount of pressure is involved to drill beyond the lithosphere and other layers of earth and this must be factored in. The well may suffer collapse and cave in on itself, when it happens like that the oil stream is closed off, if the pressure is not constantly monitored. One way to strengthen the wall of the well is to insert big steel pipes into the bore of the well. This will in the long run prevent the well from caving in.
The pressure used in the extraction of the oil need to be watched constantly, so that the well does not collapse and cave in which will prevent the flow of oil. To sure up the walls of the well, a tube can be inserted into the drilled hole that will reduce any chance of the walls caving in.
The well's borehole can be drilled either vertically or diagonally and have steel pipes installed in it all the way to the base. The pipes are usually 40 feet long and are threaded in order to be able to be connected and form a chain or string. Each pair of pipes is then connected by what is called a collar.
Next, there is the need to consider the well's boreholes. These are drilled either diagonally or vertically and then tubular steel are installed all the way through to the base. Each piece of pipe is set to be 40 feet long and have both ends threaded, so that they can be used to create a string or chain of pipes. A collar is used to then connect a pair of pipes.
Between wall of the well and the steel pipes there is a small space. The pipes cannot be left exposed and unsupported, so they must be fixed in order to be able to stay in position over a long period of time. To set the pipes, cement is poured into the space between the wall and the pipes (annulus) and then allowed to dry.
After each stage of the drilling process casing is carried out. It therefore means that cement is also added and that the drilling is also done in stages in conjunction with the inserting and cementing of the steel. This results in having the casings uniformly matched to fit from one stage to the next.
It will become apparent while drilling if an extra case is needed. This extra case is called intermediate casing and is normally installed in the area that shows signs of deterioration caused by drilling. The intermediate casing will strengthen and stabilize the area.
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