Oil Gas and Minerals

Transferring Mineral Rights by Tenant in Common
My two brothers and myself and own a fraction of the oil, gas, mineral rights to an old family farm, the rest being held by cousins and an uncle as tenants-in-common. Our uncle wants to transfer his entire interest equally to my two brothers and myself. What document would record this transfer? Would it be filed with the recorder of deeds? Would there be any taxes or additional fees involved in this transaction? It is not necessary to specify what percentage of ownership my uncle has, merely to indicate that the ownership has passed to my brothers and myself.
How does my friend claim the mineral rights that her mother owned when she passed away?
I have a client whose mother owned mineral rights (natural gas) in Los Angeles County at the time of her death. Is there a particular form of deed for this? The mother didn't own the fee. The daughter (my client) probated the will in New Jersey, where her mother resided. So-do I need a specific form of 1) Executor's deed, and/or 2) Deed conveying only mineral rights? I have a good description, plus the probate information. The company which manages the property under which the asset lies says that they are fairly certain no California probate is involved, because of the relatively modest value of the asset. I've managed to get the information on how to effect the transfer to my client, but a deed is necessary. If you can find the form, and formalities of recording.
Do the overriding royalty holders drop off of the list once the lease has changed hands?
I live in Tennessee and I purchased several oil leases in Lee County, Kentucky. These leases have not been in production for over 15 years. Do the overriding royalty holders drop off of the list once the lease has changed hands? Or, Is the overriding royalty expired because production was stopped for so long and the lease has changed hands? (Were talking overriding royalty, not royalty interest.)
Can the gas company legally condemn my property to lay pipe on it?
Can a Gas company legally condemn my property if I refuse to let them dig and lay a pipe line on it?
Who is responsible for moving items of private property to repair gas lines?
Both my wife and I are disabled. We are raising five grandchildren. We barely make it from month to month. There's a gas line that comes across our property within 20 or 30 feet of our back door. I have a utility building, a car shelter, trees, and flowers. I was told by a company official that they plan to dig up the line and do repair work. I explained to them that I wasn't able financially or physically to move the items. They gave me three weeks to get them moved. What can I do?