# BoreHole

> The bore_hole block of a .well file: a list of BoreHole objects.

Property `bore_hole` of the .well root, an array of objects, required. [Defined in the spec](/format/spec/v2/object-schemas#borehole--bore_hole).

| Field | Type | Required | Values / constraints | Description |
| --- | --- | --- | --- | --- |
| `from` | number | yes |  |  |
| `to` | number | yes |  |  |
| `diameter` | number | yes |  |  |
| `drilling_method` | string | no |  |  |