METHOD FOR ASSEMBLING SECTIONAL JET PERFORATOR Russian patent published in 1996 - IPC

FIELD: oil production, assembly of jet perforators to open productive spaces of up to 300 m and more in vertical, and preferentially, in horizontal wells. SUBSTANCE: sections are joint and sealing joint units are assembled for all the length of perforator casing. The casing is lowered in the well to the depth of pressurization. The casing is squeezed with operating pressure. The casing is lifted of the well and hung from well mouth by its upper end. Then casing is tested for integrity by inserting an instrument inside the casing to its lower end. Charge string is assembled and charge is placed in the casing followed by coupling string skeletons for all perforator length. The unit string is descended in casing cavity and secured by upper section or support of the lower end. EFFECT: high efficiency. 5 dwg