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Synonyms for tophole

References in periodicals archive ?
In the Utica, we are currently operating one horizontal rig and one tophole rig.
Paul Barrett, Managing Director of Europa, said "Construction of the well cellar and the drilling of the tophole section have taken place in challenging weather conditions and all involved have risen to the challenge admirably.
AGR Subsea--RMR[TM] Riserless Mud Recovery System A Dual Gradient Tophole Drilling System;
Well cellar construction will commence on the 18th November and the tophole section is expected to be pre-drilled ahead of the arrival of the HH102 rig in December.