Abstract: Apparatus and method for explosive and chemical rehabilitation of existing oil wells' perforations and formation, to stimulate oil production therefrom, comprising a combination of detonating cord with a plurality of hardened steel tubes, disposed at predetermined distances thereabout, effectuating a time sequencing of the detonating cord explosions and burn rate. A high-pressure detonator, surrounded by a protective shield, which absorbs the explosive power of the detonator while preserving its desired release of kinetic energy, is used to ignite the detonating cord. An external plastic tube, adjacent to the detonating cord, is filled with oil well production enhancing chemicals such as acid etchers or paraffin dispersants, wherein upon ignition of the detonating cord, the chemicals are explosively propelled through perforations into the formation thereabout, to stimulate and chemically react therewith. A Sample basket and weight are mounted to the bottom of the apparatus. A 0.

Abstract: An apparatus and method for increasing the permeability of a productive oil formation, comprised of desensitized detonating cord with a plurality of steel sleeves thereabout, functioning as pressure compensators, disposed at pre-determined distances along the detonating cord to produce sequential pulse/delays upon ignition of the detonating cord. A high-pressure detonator ignites detonating cord. A protective shield, mounted about the detonator, reduces the explosive force, while preserving the kinetic energy effectuated by the detonator. An external plastic tube, arranged adjacent to the detonating cord, is filled with production enhancing chemicals, which are propelled through clogged perforations and stimulate the surrounding formation, thereby increasing transmissibility of a productive oil formation. A weight and Sample/Junk basket to retrieve materials after the process are mounted to the bottom of the apparatus. A 0.092 diameter support wire serves as the back-bone of the entire apparatus.

Abstract: An improved, simplified and less expensive apparatus and method for cleaning wells embodies an elongated tube of combustible material, sealed at its ends, that is ignited at one end to generate a pressure wave that travels along the length of the tube. Outwardly directed pressure generated within the well casing by the deflagration is periodically attenuated at spaced locations along the length of the tube by a plurality of spaced short, steel sleeves circumscribing the tube and secured thereto. Three such tube sections are provided, each with its spaced, short circumscribing steel sleeves and each ignited in a selected chronological and positional sequence by three individual simultaneously electrically activated detonator caps which are provided with mutually different delay times.