Thought I'd try this over here I saw one of these years ago perhaps as a diagram. My well casing is 2" steel and I need to raise the sucker rod about 8 to 12 inches to see if the threads on the joint are history or not. The pics online these days are so small an 8 year old couldn't decipher them. Can anyone point me in the right direction please? I don't know the top dimension of the coupling but it's a bit over an inch probably. The hole takes a 5/8s bolt. These are just a section of pipe that will fit in the casing around the sucker rod and capture it when you pull up on it.
Ron
Ron