A centralizer run on the outside of the casing in order to run casing, liner or sand screens into the wellbore; designed with bi-directional rollers around the exterior which maintain contact with the casing and the borehole wall to reduce torque and drag

'around':28 'bi':25 'bi-direct':24 'borehol':39 'case':9,14,36 'central':2 'contact':33 'design':22 'direct':26 'drag':45 'exterior':30 'liner':15 'maintain':32 'order':11 'outsid':6 'reduc':42 'roller':27 'run':3,13 'sand':17 'screen':18 'torqu':43 'wall':40 'wellbor':21

LOTORQ

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