Do real people actually invest in direct participation joint ventures for oil well leases?

I am a real person who inherited a 25% working interest from my grandfather -in-law, from 4 gas wells drilled in the fifties. He was not in the business. For the last 20 years, since I’ve been involved, we have had to write a check every month for expenses. The largest item every time is ‘operational overhead’ which is not costs directly attributed to the wells, just the operators’ monthly expenses divided by all the wells they operate. To stop this monthly drain, I have to cough up the money to cap the well, which has been estimated to me as $30,000-60,000.00. And no one will give me the Joint operating agreement, which would spell out whether or not they can charge the operational overhead, not the operator, not the bank trust department who managed it for 40 years, or the other WI partner.