FIELD: oil and gas well drilling and exploitation, particularly to predrill and drill side bores from cased and uncased wells.
SUBSTANCE: device comprises diverting wedge, body, anchor made of tube corrugated in longitudinal direction from well and whipstock lowering and location unit. Anchor has outer perimeter 3-4% greater that of well bore or casing pipe. Whipstock has pump for liquid removal from anchor interior for following whipstock and anchor lifting from well.
EFFECT: possibility to remove whipstock provided with anchor made of tube corrugated in longitudinal direction from well.
3 dwg
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