Patent ID: 6092594
Filing Date: 2000-07-25
Classification: E21B

Abstract:
Device for making or regenerating a water well, the well comprising a casing installed inside a borehold in the ground, comprisingan operating head with angularly equispaced radial seats in which respective punch tools for forming holes, windows or shaped cuts in the wall of the casing are slidingly housable, means for driving said operating head from the mouth of the well to a position at a preestablished depth inside the casing so that the radial seats are orthogonal to the wall of the casing, and operating means integral with said operating head to move said tools within the respective radial seats to and from the wall of the casing,wherein the operating means of said tool comprise a slider mounted inside said head and slidable in a direction orthogonal to the axes of said seats, said tools being slidingly connected to said slider according to respective directions inclined with respect to the sliding axis of the slider and converging at a common point on said axis, operating means being provided for moving said slider, so that the axial sliding of the same in either direction causes a corresponding orthogonal sliding of said tools inside the respective seats,wherein at least one axial groove is formed on the external surface of said slider, having a depth which increases from one end to the other of the slider as well as a substantially T-shaped channel at its bottom, within which a correspondingly shaped end of a respective tool is slidingly engaged.