OIL WELL DRILLING PACKER Russian patent published in 1995 - IPC

FIELD: oil and gas industry. SUBSTANCE: groove, located on outer surface of rod in packer, is made of lengthened and shortened grooves, connected by inclined groove, and has the grooves tailing part, made in the form of shifted to different sides relatively to shortened groove correspondingly left and right longitudinal grooves, connected in their lower part by inclined groove. In the case Left longitudinal groove is longer than right groove and is connected from above with shortened groove and upper part of inclined groove, and right longitudinal groove is from above connected with lengthened groove and with lower part of inclined groove. EFFECT: oil well drilling packer is used in oil and gas industry. 4 dwg