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BOREHOLE ENLARGEMENT

The borehole can be enlarged in the range of 108 – 460 mm. It is possible to enlarge an existing borehole. There are two types of reamers: fixed-diameter reamers (for enlargement beginning from surface) and hydraulically expandable reamers. Unlimited number of activations is possible regardless of the well-inclination angle, including ERD wells and wells with inclination over 65 degrees.

Application:

  • Wells with multiple alternate intervals that require and do not require enlargement

  • Highly abrasive formations

  • Can be used in ERD wells and wells with inclination over 65 degrees where the conventional activation system has certain engineering constraints

  • Unlimited number of activations regardless of the well-inclination angle

  • Borehole enlargement range – 108–460 mm

  • Placed below BHA components with limited ID, for example, below LWD systems

  • A near-bit reamer is placed in the rotary BHA

Features:

  • Unlimited number of activations regardless of the well-inclination angle

  • Full flow in modes with/without borehole enlargement

  • Quick extension and retraction of PDC cutters

  • Integrated jetting nozzle and flow paths for effective wellbore cleaning

Benefits:

  • Enlargement of borehole as required

  • Higher drilling performance

  • Concentric gauge holes


Расширение ствола скважины

Расширение ствола скважины