MULTI-BARREL DRILLING TOOL DURING ONE ROUND TRIP OPERATION Russian patent published in 2020 - IPC E21B7/04 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to the field of drilling multi-barrel wells. Method of drilling multi-barrel well includes connection with possibility of separation of anchor retainer component inside parent wellbore, cased at least partially by casing string, deviation of the drill bit component and the borehole deflector component for milling the window in the casing string, drilling the side wellbore through the window using the drill bit, wherein the borehole of the well exits the parent borehole, planting the multi-barrel interface unit with the side branch into the side wellbore and the main branch into the parent wellbore, and actuating at least one filter component. Each component of a group consisting of an anchor retainer component, a drilling bit component, a downhole component, a multi-stem interface unit and at least one filter component, form a tool for multi-barrel well and are functionally connected to each other so that movement of component causes corresponding movement of adjacent component.

EFFECT: higher efficiency of drilling and completion of multi-barrel wells, improved efficiency of each lateral wellbore, leaving the parent wellbore.

20 cl, 7 dwg