We found 8 dictionaries that define the word directional drilling:

General (3 matching dictionaries)

1. directional drilling: Collins English Dictionary
2. Directional drilling: Wikipedia, the Free Encyclopedia
3. directional drilling: TheFreeDictionary.com

Business (2 matching dictionaries)

4. Directional drilling, Directional drilling: Financial dictionary

Computing (1 matching dictionary)

5. directional drilling: Encyclopedia

Tech (2 matching dictionaries)

6. Schlumberger Oilfield Glossary (No longer online)
7. Oil and Gas Well Drilling and Servicing eTool (No longer online)

Definitions from Wikipedia (Directional drilling) ▸ noun:  (or slant drilling) the practice of drilling non-vertical bores. ▸ Words similar to directional drilling ▸ Usage examples for directional drilling ▸ Idioms related to directional drilling ▸ Wikipedia articles (New!) ▸ Words that often appear near directional drilling ▸ Rhymes of directional drilling ▸ Invented words related to directional drilling