Oil Well Drill Bit Size Chart

The llow of the chart indicates hole sizes that may be required to set that size of pipe i e 5 in liner inside or b a in.

Oil well drill bit size chart. 6 3 can be used to select the easing and bit sizes required to fulfill many drilling programs. In the oil and gas industry a drill bit is a tool designed to produce a generally cylindrical hole in the earth s crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas this type of tool is alternately referred to as a rock bit or simply a bit the hole diameter produced by drill bits is quite small from about 3 5 inches 8 9. Whether the job is well completion re entry oil gas water or mining drill bit manufacturers have risen to the challenge to meet the needs of the drilling industry. With similar considerations the drilling bit size and casing size of successively shallower oil gas well segments are selected.

To use the chart determine the casing or liner size for the last size of pipe to be run. This in turn determines the minimum size of the second deepest casing string. The ase expert as part of the drilling team makes recommendations for improvements related to bit selection and drilling for future well plans. The well evaluating every part of the drilling operation.

The bit used to drill the hole for the production casing must fit inside the casing string above see below table. After the hole is drilled sections of steel pipe slightly smaller in diameter than the borehole are placed in the hole cement may be placed between the outside of the casing and the borehole known as the annulus.