Abstract: A high production rate water well system combines a horizontal production liner in the aquifer with an existing vertical well or pump that extends down thereto, with one end portion of the liner passing a distance from the vertical well that does not exceed about 5% of the drainage radius of the later. High flow rate recharge also can be accomplished by the same system.

Abstract: Methods and apparatus combinations for making a substantially horizontal water well completion for irrigation or commercial water supply purposes includes running a substantially vertical surface string of casing, running a bend section of casing that has been preformed to provide a bend angle of about 90.degree. in a straightened-out condition down through the surface section and allowing it to assume its bend condition below the lower end of the surface section, coupling the upper end of the bend section to the lower end of the surface section, running a water production section of casing through both the surface and bend sections and outward horizontally into the aquifer, and either coupling the inner end thereof to the outer end of the bend section, or extending the production section all the way to the surface. Unique coupling mechanisms, running and retrieving tools and other devices also are disclosed.

Abstract: Methods and apparatus combinations for making a substantially horizontal water well completion for irrigation or commercial water supply purposes includes running a substantially vertical surface string of casing, running a bend section of casing that has been preformed to provide a bend angle of about 90.degree. in a straightened-out condition down through the surface section and allowing it to assume its bend condition below the lower end of the surface section, coupling the upper end of the bend section to the lower end of the surface section, running a water production section of casing through both the surface and bend sections and outward horizontally into the aquifer, and either coupling the inner end thereof to the outer end of the bend section, or extending the production section all the way to the surface. Unique coupling mechanisms, running and retrieving tools and other devices also are disclosed.

Abstract: In accordance with an illustrative embodiment of the present invention, an irrigation, commercial or municipal utility district high flow capacity water well is completed in a manner such that water is produced from a substantially horizontal lower portion of the well bore that is located in the lower 20% of the water saturated thickness of the aquifer.

Abstract: In accordance with illustrative embodiments of the present invention, a process for the secondary recovery of oil found in a dolomite formation includes generating in-situ decomposition of the dolomite by heating it to a temperature in the range of from 1,400.degree.-1,750.degree. F. which produces a reaction that has magnesium and calcium oxides and a large quantity of carbon dioxide as products. The carbon dioxide saturates the oil in surrounding formations and makes it more movable toward one or more recovery wells. The heat is convected into the formation by a fluid that is injected into the well from the surface.