[Baz]

One of the industry terms used is "abandoning" the well. You may find this term handy when researching the topic.

Different techniques are employed for different types of wells. But the objective is the same. Remove the possibility of a conductor from surface to ground water. (or get rid of the straw!)

I would check with your local government which oversees irrigation/wells - it could be the city, or the county, and in some cases the state has it's own codes and procedures. A local well driller would know and be able to help you.

In our area well management (permitting.etc.) is governed by the county environmental health department and we are also part of a water management district (St. Johns) which sets policy for this part of the state.

Lastly - I have found You Tube a valuable asset when researching a particular procedure whether something to do with electrical, plumbing, auto, etc. You may want to do a search there once you've determined what type of well you have.