Yes, offshore drilling is consistent with environmental preservation, because offshore drilling does not have a large impact on the environment. Compared to other methods of energy production, offshore drilling affects very little in the environment. Oceans are vast, and drilling stations are small in comparison. There are many more damaging ways that humans harvest energy.
Yes, offshore drilling is less intrusive to the environment than other methods of obtaining energy. Our oceans are vast, and offshore drilling is a good way to harvest energy, that is less intrusive to the environment than coal power, or nuclear power. Technological advances will continue to make offshore drilling even safer. But these advances cannot take place if offshore drilling does not happen in the first place.