Document Format Files
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 2 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | val-20230418.xsd | EX-101.SCH | 3921 |
| 3 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | val-20230418_def.xml | EX-101.DEF | 5952 |
| 4 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | val-20230418_lab.xml | EX-101.LAB | 7680 |
| 5 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | val-20230418_pre.xml | EX-101.PRE | 4602 |
| 125 | EXTRACTED XBRL INSTANCE DOCUMENT | val-20230418_htm.xml | XML | 140600 |
EIN.: 980635229 | Fiscal Year End: 1231
Type: DEF 14A | Act: 34 | File No.: 001-08097 | Film No.: 23827543
SIC: 1381 Drilling Oil & Gas Wells