Additionally, directional drilling allows for multiple wells from the same vertical well bore, minimizing the wells' environmental impact. Improvements in drilling sensors and global positioning ...

Plans to drill a vertical water well 5,000 to 7,000 feet deep into the Matilija Sandstone Formation have been shelved.

Rushan's reaction followed an article by AsiaNews, which reported that the China National Petroleum Corporation (CNPC) had successfully completed the drilling of Asia's deepest vertical well.

"Our recent drilling program has validated what we've long understood ... our secondary target for heavy oil has exceeded our expectations for inflow of cold flow heavy oil from a vertical well bore.