Abstract: A concrete well casing comprising a cylindrical reinforcing mesh wire having inner and outer sides and upper and lower ends. A plurality of flat centralizers have their lower ends secured to the wire mesh in a spaced-apart condition adjacent the lower end thereof and extend outwardly and upwardly therefrom. The wire mesh is embedded in concrete to form a casing. Each of the centralizers has an outer end portion which is normally substantially flush with the exterior surface of the casing but which may be deflected or bent outwardly therefrom for engagement with the wall surface of a well bore hole to centralize the casing with respect to the well bore hole as it is being lowered thereinto.

Abstract: A concrete well casing comprising a cylindrical reinforcing mesh wire having inner and outer sides and upper and lower ends. The wire mesh is comprised of a plurality of substantially horizontally disposed and vertically spaced-apart ring-shaped members which are operatively interconnected by vertical rods secured thereto. A plurality of cable hooks are operatively secured to the wire mesh and extend outwardly therefrom. The wire mesh is embedded in concrete to form the casing. Each of the cable hooks has an arcuate outer end portion which is normally substantially flush with the exterior surface of the casing but which may be deflected outwardly therefrom for attachment to a casing positioning cable.

Abstract: The means for creating perforated concrete casing comprises a hollow cylindrical canister having a plurality of spaced apart rows of elongated openings formed therein. The elongated openings in each row are horizontally disposed and are vertically spaced. A first support means is secured to the outside surface of the canister adjacent each row of openings. A plurality of vertically spaced plates are mounted on each of the first support means and are selectively movable into and out of the openings of the associated row. A second support means extends upwardly through the canister and has a plurality of vertically spaced wedges mounted thereon. The second support means is movable towards the canister so that the wedges will penetrate the stiff concrete positioned adjacent the inside surface of the canister so as to create tapered perforations therein.

Abstract: A head shaft breaking tool comprising an elongated hollow shank portion adapted to be slipped over the head shaft. The lower end of the shank portion is provided with a plurality of spaced-apart teeth which are adapted to engage the coupling at the lower end of the head shaft. A cross bar is secured to the shank portion at the upper end thereof and is adapted to receive hold-down bolts extending upwardly from a housing at the upper end of the head shaft to draw the teeth into engagement with the coupling and to prevent rotation of the shank portion as the head shaft is rotated relative to the coupling by means of a pipe wrench or the like.

Abstract: The means for creating perforated concrete casing comprises a hollow cylindrical canister having a plurality of spaced apart rows of elongated openings formed therein. The elongated openings in each row are horizontally disposed and are vertically spaced. A first support means is secured to the outside surface of the canister adjacent each row of openings. A plurality of vertically spaced plates are mounted on each of the first support means and are selectively movable into and out of the openings of the associated row. A second support means extends upwardly through the canister and has a plurality of vertically spaced wedges mounted thereon. The second support means is movable towards the canister so that the wedges will penetrate the stiff concrete positioned adjacent the inside surface of the canister so as to create tapered perforations therein.