A home equity line of credit (HELOC) is an option to tap into your home's equity, and use the loan to pay off high debt mortgages or any other emergency expenses. The application process is simple, but you should rather know about the eligibility first.
Any lender would consider multiple factors before providing HELOC, starting with your loan-to-value ratio (generally 85%), credit score (which seems to be fine in your case), and overall debts or debt-to-income ratio.
As far as the application process is involved, you can visit any of the major financial institutions and apply for HELOC. Be ready for thorough paperwork. Good luck!