0
When a well is drilled and the drill is removed, all that is left is a hole in the earth/rock. If left that way, the hole could partially or completely collapse. To avoid this, a casing is inserted into the well hole. Usually this is a metal pipe, but it does not have to be made of metal. In the past, stones or bricks were laid by hand to fulfill this purpose. In some cases, a plastic pipe is sufficient.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is casing pipe?
it is defined as the pipe cemented in the well to seal off formation fluids and to keep the hole from caving in.
What is the outside casing of boudin made from?
Natural casing which is most common is made from pig intestines which has been flushed throughly. They also have synthetic casing though.
How does a jet pump work in a water well?
The most basic jet pump has a round pump chamber containing an impeller. The outlet to the well is large and the outlet to pressure tank is small. When the pump is primed and switched on it will suck water in and expel it at a higher rate. They are very susceptible to air leaks -every connection MUST be airtight.
What is expansion turbine?
differential expansion is refer to differential distance between rotor blade and fix blade.rotor expand toward generator and casing expand toward control valve.when temperature increase ,expansion in casing and rotor.so rotor mass is less than casing which rotor expand more than casing.
At what weight casing slip should be set in oil wells?
The buoyed weight of the casing above the cement top.
Why is there sand in my well water?
cracked casing bad news
Is there a well water filtration casing that comes off at the top instead of the bottom?
No, there is not.
What are casing and cementing services?
Casing and cementing services are provided when the well is drilled. Casing is a large steel pipe, inserted into the wellhole and cemented into place.
What is eddies in volute casing of a centrifugal pump?
In Volute Casing, area of flow increases gradually, Due to this, the amount of movement of water opposite to the general flow of water is more. This movement of water against the actual flow of water is called EDDIES in Volutes casing of Centrifugal pump.Where as in Vortex casing area of flow is uniform and effect of formation of eddies is very less.
How deep does the casing go into the well water?
In most modern deep wells (40-400 fet) the casing is a 6" steel tube that goes all the way to the bottom. The submersible pump hangs in the middle of the water table and usually pumps up a 1 " poly-rubber tube.
What is tubing and casing in well engineering and how are they related in the field?
I will expand on your question a bit, and explain casing, liner, tubing and drill pipe and include some information on the Macondo well. Casing and tubing are tubular goods. Casing is the most outer layer and acts to prevent fluids from coming into the well bore. The casing is cemented in place and the well is sealed. Once the well is cased, a tool called a perforating gun is run into the hole, and holes are maded at selected intervals so the oil or gas can be produced. A well may contain intervals that contain water, so it is important to seal the well using production casing and cement and then select the interval containing oil. A production liner is similar to casing, as it is used as a barrier. The top of a liner is hung from the last caing or liner that is run into the hole. Production tubing or the production string is used to produce the well. See related links. It is placed inside of the casing. There are rubber seals called packers that block fluids from flowing outside of the tubing. Finally, drill pipe is used to drill the well. Tests of productive intervals may be conducted using the drill string, but it is not used as production tubing. Since you asked this question under the BP Oil Spill category, the Macondo well had production casing and at the time of the accident drill pipe had been run to a depth of 8367'. The well was considered by BP engineers to have a good seal because they had pump cement to hold the casing and everything went ok. When they began to replace the drilling fluids with sea water, hydrocarbons began to flow. Evidence presented by BP now indicates that a contributing factor to the blow out was weak cement. See related links.
Why Metal casing for tea kettles?
Metal casing on kettles is common. Metal casing is desired on anything to put on the stove. This is because the material conducts heat so well and efficiently stays warm.
What is an artesian wall?
I dont know what an artesian wall is but an artesian well is a well that has been drilled and the driller hit a big water vein and the water from the well over flows the hole that is drilled and in turn the water overflows the well casing....there is nothing bad about an artesian well except that the ground around the well will always be damp and soggy.
How can you find your submersible water well pump if there is no pipe out of the ground?
There has to be a casing for the pump to be in. There should be something showing above ground. How is the power run to it, does that point you in a direction? Where is the water tank, where does the line coming in point to?
Zip table for nitrogen in use in oilfield?
a well is filled with water having 7" casing and 3 1/2" drillpipe . how much pressure will required for evacuating 2500 m well volume
How does air get in well water pipes?
this is most common down towards the bottom of the well. the pipe well casing could have even just a pin hole from corrosion to small for water to get through but just enough for air to get in. this would when the water flows it would cause a vacuum to come into the pipe allowing air into it. The result of this would give you a milky color water. To test if it is air just fill a glass or vial or any container really and put water in it and let it sit. if the milky color doesn't disappear then it is not air. To fix you would most likely have to replace the well casing or the pipes attached to the pump.
How do you open veins in a water well with dry ice?
I have been looking for this info as well. So far I have found that for domestic wells approximately 60 to 80# of dry ice is used while for larger commercial wells up to 800# may be used. If the well has a large amount of casing say over 150 feet one should be able to add the dry ice and quickly cap the well. If there is a lesser amount of casing one risks having the resulting pressure blow out or unseat the casing and losing the seal. In this case one must make some other arrangement to seal off the well below the casing in order to contain the prssure without damage to the seal.
