INTERVAL PACKER Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: interval packer is intended for isolation of well bore-hole in carrying out technological operations in treatment of oil bed. Packer is made up of upper sealing member and lower sealing member with bores, and lock of compressed position of sealing members. Also provided is anchor and valving mechanism in the form of stepped bush installed in housing in the form of upside-down turned sleeve. Control coupling has pin in its side surface. Housing of sleeve turned upside down is provided with shell having limiter on upper end of pipe string. Shell is connected with pump-compressor pipes. Stepped bush is located concentrically in turned upside down sleeve and is provided with two end protrusions and shaped slot for location of control coupling pin in it. Operating mechanism of valve is made in the form of lifting-plug cock. Spool of this cock has external tapered generant surface and is located on pipe string movably. Body of cock spool has internal tapered hole and internal bore at side of small taper diameter. It can turn on tapered generant surface of cock spool. Cock spool at side of small taper diameter has external cylindrical turning and external thread, and it is also is provided with intercrossing radial and axial holes. Cock spool body has radial hole. Radial holes of cock spool and of spool body must be aligned in one position, and be diametrically opposite in another position. Spool of cock at side of large taper diameter is rigidly connected with packer barrel. Aforesaid embodiment of packer allows for enhancing operational reliability combined with higher safety in operation at disconnecting of well bore-hole. EFFECT: higher efficiency. 1 cl, 4 dwg