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2 296 208

(13)

(51)

IPC

E21B33/12(2006-01-01)

(21) (22)

Application

2003135806/03, 2003-12-09

(24)

Start date

2003-12-09

(22)

Actual filing date

2003-12-09

(45)

Published

2007-03-27

(72)

Inventor

Fajzullin Ilfat NagimovichPoljaev Nikolaj Vasil'EvichTukhbatullin Ramil' RavgatovichStrakhov Dmitrij Vital'EvichZijatdinov Radik ZjauzjatovichSalakhova Zul'Fija Rafagatovna

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Im. V.D. Shashina

PACKER ASSEMBLY FOR ADDITIONAL CASING PIPE Russian patent published in 2007 - IPC E21B33/12

Abstract RU 2296208 C2

FIELD: oil production, particularly to lower additional casing pipes in wells having damaged casing pipes.

SUBSTANCE: assembly has deformable body with elastic collar put on the body, installation unit, locking mechanism and expansion unit. Expansion unit cone is located in upper part of deformable body and cooperates with stepped cylinder. Stepped cylinder and locking mechanism body define hydraulic chamber communicated with tubing string interior. Excessive pressure created in tubing string is transmitted to hydraulic chamber and provides downward cylinder movement. The cylinder acts on cone, which in turn tightly presses elastic collar to casing pipe wall.

EFFECT: provision of necessary and reliable sealing member air-tightness and prevention of troubles.

2 cl, 1 dwg

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RU 2 296 208 C2

Authors

Fajzullin Ilfat Nagimovich

Poljaev Nikolaj Vasil'Evich

Tukhbatullin Ramil' Ravgatovich

Strakhov Dmitrij Vital'Evich

Zijatdinov Radik Zjauzjatovich

Salakhova Zul'Fija Rafagatovna

Dates

2007-03-27—Published

2003-12-09—Filed