What is surface casing?
A Surface Casing is a pipe string with a large diameter that is the first one to be set in a well.
It is a low-pressure pipe which is cemented first in the well to act as a protective shield to preserve the water aquifers in the region.
It is also known as a surface pipe..
How does well casing work?
Casing provides support for the wall of the well so that loose rock fragments or unconsolidated sand and gravel through which the well has penetrated do not collapse into the well shaft. The casing protects the electrical wires, pull cable and water tubing/piping that are connected to the submersible pump.
What is a pump casing?
Pump casings serve to seal off the intside of the pump to atmosphere to prevent leakage and retain pressure. In the case of centrifugal pumps, they surround the pump rotor which transmits energy to the fluid handled via the impeller(s) mounted on the rotating shaft.
What is the use of casing?
The casing forms a major structural component of the wellbore and serves several important functions: preventing the formation wall from caving into the wellbore. isolating the different formations to prevent the flow or crossflow of formation fluid.
What is difference between casing and tubing?
Tubing naturally has a smaller diameter than casing, except for the 4 1/2-inch diameter. … Anything smaller is called tubing, anything larger is casing. From the surface to the bottom of the well, the casing telescopes down in size – there are various types of casing depending on their purpose and diameter.
How far down does well casing go?
18 feetWell Casing Depth Modern drilled wells reach greater depths, with a foot or two of casing above the well, a minimum of 18 feet of casing below the surface, if the well goes through bedrock, at least 5 feet of casing within bedrock.
What do you mean by casing?
1 : something that encases : material for encasing: such as. a : an enclosing frame especially around a door or window opening. b : a metal pipe used to case a well.
Which is the best casing pipe for Borewell?
PVC casing pipesHowever, PVC casing pipes have now become the go-to choice for borewell projects as they are durable and last longer. PVC casing pipes from Skipper are versatile and suitable for all borewell projects.
What are the types of casing?
There are six basic types of casing strings:Conductor Casing.Surface Casing.Intermediate Casing.Production Casing.Liner.Liner tieback casing.