| 摘要 |
FIELD: oil-and gas industry. ^ SUBSTANCE: according to method of a pipe element located in a borehole compacting without decreasing of its initial diametre, at first execute initial widening of the borehole located pipe element and the following patch widening into primarily widen pipe element located in the borehole. Execute the both widening during a single descending-lifting up operation. ^ EFFECT: maintenance patch installation efficiency increase. ^ 16 cl, 5 dwg |
