Question

How is drilling of oil wells done.

Answer 1

The process of drilling an oil and natural gas production well involves several important steps: Boring a drillbit and pipe are used to create a hole vertically into the ground. Fortunately, a process called directional drilling can be done to bore a well at an angle.

Answer 2

There are much more details in each step, but I am just going to generalize them.

Determine target formation, type of well (horizontal or vertical), and well path.Determine pore pressure gradient and fracture pressure gradient. These information are used to calculate drilling mud weight and setting depths of casingPut the drill bit on the ground and start drilling based on the calculated well path. While drilling, the BOP(blow-out preventer) is engaged at the top of the well to control and shut-in the well in case of emergency.Set and cement casing at each specific depth. A typical well has 4 types of casing: conductor casing, surface casing, intermediate casing, and production casing.Complete the well, put on the wellhead (X-mas tree) and start producing.
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