Name the process through which petroleum is extracted from deep ocean.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the process through which petroleum is extracted from deep ocean sources.

2. **Identifying the Process**: The process used for extracting petroleum from deep ocean sources is known as "Offshore Drilling." This involves drilling wells into the ocean floor to access petroleum reserves.

3. **Explaining Offshore Drilling**:
- Offshore drilling involves the use of specialized platforms that are either fixed to the seabed or floating on the surface of the ocean.
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