FIELD: oil and gas industry.
SUBSTANCE: drilling rig includes a derrick with a base on a drilling floor, which covers at least some part of drilling floor having a hole in the centre of the well, and at least one additional hole mutually spaced with the well centre, and a unit with a drive for screw drilling of an auxiliary bore pit used during drilling operations of the well shaft, which is installed with possibility of being moved in the section of the above part of the drilling floor and capable of being moved from the hole above the well centre to at least one additional hole and containing a drive with a rotor and a supporting structure for the drive capable of being moved relative to the supporting structure, a lower rope and a screw borer connected to the rotor for its rotation for drilling of an auxiliary bore pit; at that, lower rope can be used for movement of the drive relative to the supporting structure to contribute to drilling process of the auxiliary bore pit.
EFFECT: portability and enhanced accuracy and efficiency of drilling is provided.
27 cl, 39 dwg
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