FIELD: oil and gas industry.
SUBSTANCE: invention contains housing installed on casing pipe with possibility of rotation and longitudinal movement between two limit stops. Limit stops are rigidly fixed on casing pipe and designed as rings with threaded openings. Retaining screws interacting with casing are installed in threaded openings. Limit stops rings are separated from housing which includes upper and lower belts. Belts are designed as cylinder rings connected to centring ribs curved by arc in planes forming outside part by bulge. Outside surface of centring ribs in centreplane is designed arc-shaped with radius equal to outside radius of housing belts.
EFFECT: improving operating reliability.
1 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2731723C1 |
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| CENTERING MOUNT-TURBOLATOR FOR CASING STRING | 1998 |
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| CENTRALIZER AND CASING STRING | 2001 |
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| CENTRALIZER FOR PIPES OF OIL AND GAS WELLS | 2001 |
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RU2275488C1 |
