PROCEDURE FOR COMPLETION OF STRIPPER WELL Russian patent published in 2016 - IPC E21B43/11 E21B33/13 E21B43/27 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to method for completion of oil strippers with open face. Method involves drilling of well shaft under production string with primary opening of productive formation throughout its thickness. Production string is lowered equipped with packer of cup cementation and section of casing pipes with through holes made in them, closed by fusible inserts, for example aluminium. One performs direct flushing of well shaft at least by two cycles with drilling mud through production string shoe with subsequent removal of drilling mud from lower part of production string and filling of its lower part in range of whole thickness of productive formation with water solution of calcium chloride. Packer for cup cementation is installed higher than reservoir roof in cemented clay interlayers with isolation of productive formation from overlying rocks. Packer is placed at depth of solid cemented clay productive formations. Entire thickness of productive formation is covered with section of casing pipes located below packer. Annular space behind production casing is cemented. Well is held for waiting period of cement hardening and impregnation of well bore zone with calcium ions in aqueous solution of calcium chloride, with water-repellent properties. Packer is drilled. Well is pumped with hydrochloric acid to below packer space and fusible inserts are destructed with release of through holes of section of casing pipes. By creation of depression inflow from productive formation is caused.

EFFECT: preservation of stability of walls of well shaft and high yield of marginal well.

1 cl, 4 dwg