METHOD OF MAKING DIRECTIONAL WELL Russian patent published in 2009 - IPC E21B7/04 

Abstract RU 2370620 C1

FIELD: oil and gas production.

SUBSTANCE: method consists in drilling vertical section of well and successive drilling of interval up to bottomhole. The feature of the method is drilling of single profile step-less section along trajectory after drilling of vertical section; horizontal and vertical points of trajectory are determined from mathematic formula with consideration of linear scale factor, inclination angle and friction ratio.

EFFECT: reduced power expenditures and time of construction of directional well due to reduced resistance to movement of drilling string and inter-well equipment along trajectory determined from given ratio.

3 dwg, 2 ex

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RU 2 370 620 C1

Authors

Oganov Garri Sergeevich

Shirin-Zade Sijavush Ali Saftar Ogly

Sarojan Aleksandr Ervandovich

Pinsker Viktor Aleksandrovich

Chan Suan Dao

Dates

2009-10-20Published

2008-06-05Filed