MECHANICAL PACKER Russian patent published in 2000 - IPC

FIELD: oil production industry. SUBSTANCE: packer can be used in completion and operation of oil and gas wells, in carrying out various technological operations for isolation of absorption zones in process of bore-hole drilling, in cementation under pressure, in hydraulic fracturing of beds, etc. Packer has barrel, shaped slot with uniformly located alternating longitudinal short and long sections. Rigidly connected to barrel is support. Located under support is pressing sealing member and cone. Cone can be axially displaced with respect to barrel. Also provided is holder which can be axially displaced. Installed in shaped slot is guide pin. Slips are installed in holder uniformly over circumference. Slips are made in the form of double-arm levers. Coding bush is installed on barrel below cone. Bush can be radially turned and axially displaced. Shaped slot is made in external surface of coding bush. Holder is secured on coding bush by means of guide pins. Slips in lower part of packer are provided with guide cams. Guide cams can rub against walls of bore-hole together with preventing radial turning of holder together with slips when packer is in transportation position. Aforesaid embodiment of mechanical packer can operate with high reliability. Its manufacture is simplified and requires less capital input. EFFECT: higher efficiency. 2 dwg