FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry and may find application in repair of oilfield pipeline. During repair of oilfield pipeline the pipeline is dug out to the length up to 15 m at the beginning, the pipeline is cut and its end is shifted aside in regard to the pipeline axis to the value of up to 0.4 m; an assembly in a form of a screw downhole motor with a chisel at the tubing string is placed into the pipeline; water is pumped through the tubing string with the flow rate of 0.2 - 0.5 m3/min under pressure of 3-6 MPa; the pipe is driven with force from 1.5 up to 3 t to salt deposits and these salt deposits are drilled out; as the assembly moves inside the pipeline the running string is extended, the pipeline is drilled at direct sections with deviation from the axis up to 15° per 10 m.
EFFECT: method provides destruction of barium sulphate deposits in the oilfield pipeline.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| REPAIR PROCEDURE OF PIPE AND TUBE PRODUCTS USED IN PETROLEUM INDUSTRY | 2015 |
|
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| METHOD OF DRILLING AND DEVELOPMENT OF OFFSHOOTS FROM HORIZONTAL WELL | 2019 |
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| COMPLETION METHOD FOR WELL WITH HORIZONTAL SHAFT | 2014 |
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| COMPLETION METHOD OF HORIZONTAL WELL | 2014 |
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| METHOD OF WELL DRILLING | 2016 |
|
RU2606998C1 |
