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Sand Point Well?
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<blockquote data-quote="cowadle" data-source="post: 4074066" data-attributes="member: 7203"><p>not drilling---- driving. i haven't seen any that thick. the drive pipe and collars are special just because the pipe will screw into the collar against an internal shoulder so the threads don't take the force from the pounding and get loose. if the collars leak air it makes pulling the water up the pipe impossible. the integrity of the pipe has to take the pounding also without bending or collapsing and the pipe has to be hard enough that the threads don't deform. i think the galvanize might have been a bit better also.</p></blockquote><p></p>
[QUOTE="cowadle, post: 4074066, member: 7203"] not drilling---- driving. i haven't seen any that thick. the drive pipe and collars are special just because the pipe will screw into the collar against an internal shoulder so the threads don't take the force from the pounding and get loose. if the collars leak air it makes pulling the water up the pipe impossible. the integrity of the pipe has to take the pounding also without bending or collapsing and the pipe has to be hard enough that the threads don't deform. i think the galvanize might have been a bit better also. [/QUOTE]
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