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Casings are larger diameter pipe that are assembled and inserted into a recently drilled section of a borehole and typically held into place with cement.

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. It also provides a vertical-cylindrical surface that in conjunction with the outer vertical wall of the drilled hole can facilitate the placement of an impermeable grout seal around the well casing.

Casing is the major structural component of a well. Casing is needed to:

Maintain borehole stability
Prevent contamination of water sands
Isolate water from producing formations
Control well pressures during drilling, production, and workover operations
Casing provides locations for the installation of:

Blowout preventers
Wellhead equipment
Production packers
Production tubing
The cost of casing is a major part of the overall well cost, so selection of casing size, grade, connectors, and setting depth is a primary engineering and economic consideration. We can assist with any technical concern here.

There are six basic types of casing strings
Conductor Casing
Surface Casing
Intermediate Casing
Production Casing
Production Liner