| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: downhole centraliser for a tubing string is mainly rigid and has a tubular plastic body with opposite ends and at least one lock ring mounted at the tubular body end. The lock ring or every lock ring is also made of plastic and has elastic modulus that does not exceed elastic modulus of the tubular body. The lock ring or every lock ring is engaged with the tubular body by shrink fit. Close to the tubular body end there is at least one opening, and close to the lock ring there is at least one respective ledge or vice a versa. In operation process the ledge and opening are engaged with each other, and in result the lock ring is engaged directly with the tubular body.EFFECT: galvanic corrosion is excluded.12 cl, 8 dwg |
