Patent ID: 7249789
Filing Date: 2007-07-31
Classification: A61B,E21B,F16L,Y10S

Abstract:
1. A single piece polyvinyl chloride (PVC) well casing comprising: a cylindrical main length extending between a cylindrical male end and a cylindrical female end, said cylindrical main length having uniform interior and exterior diameters; said male end having at least one slot through the wall of said casing at the leading edge of said male end, said slot allowing said leading edge of said male end to radially compress a lip at said leading edge of said male end; said female end having a first widened interior diameter at its outermost end wherein said first widened interior diameter is sufficient to receive a male end and a lip of a similar length of well casing with minimal clearance; said interior diameter of said female end tapering from said first widened interior diameter to a second widened interior diameter; said second widened interior diameter being less than the exterior diameter of said male end and said lip of said similar length of well casing; a first groove on the interior surface of said female end, said groove positioned to and having sufficient width to receive said lip of said similar length of well casing therein.