Oil and Gas Title Examination

I need a legal expert to provide a title opinion letter for an oil and gas title examination project.

Key requirements include:
- Drafting a detailed title opinion letter
- Addressing defeasible fee conditions, including:
- Subsequent death/remarriage effects on title
- Possession requirements to encumber interest
- Title encumbrance limitations during fee owner's lifetime

Ideal skills and experience:
- Expertise in oil and gas law
- Strong background in title examination
- Experience with defeasible fee interests and complex legal conditions

Please provide relevant experience in your bids.