METHOD AND DEVICE FOR IMPLEMENTATION OF PROCESSES IN UNDERGROUND BOREHOLE BY MEANS OF USAGE OF FLEXIBLE WELL CASING Russian patent published in 2010 - IPC E21B7/20 E21B19/22

Abstract RU 2378479 C2

FIELD: machine building.

SUBSTANCE: drilling method of underground borehole, including following stages: preparation of device for drilling of well, including drum with continuous flexible pipes string, feeding device for movement of column of flexible casings during the well construction process and one or several pumps, provided for circulation of flow medium; connected to mentioned flexible pipes string of boring tool, containing at least downhole motor and boring bit; well drilling up to mentioned width; extraction of flexible pipes string from well; separation of boring tool; lowering of mentioned flexible pipes string into well bore; suspension of delivered flexible pipes string in drilled borehole to equipment of wellhead; cutting of suspended flexible casing column; and pumping of coupling medium into free-hanging flexible casing column and into annular space.

EFFECT: cost cutting for construction of deep wells for oil and gas.

27 cl, 15 dwg

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RU 2 378 479 C2

Authors

Benge Karl Dzh.

Charron Randol'F M.

Vud Tomas D.

Dates

2010-01-10—Published

2006-06-20—Filed