Satellite well

Satellite well is a single well that normally drilled by mobile offshore drilling unit (MODU) to produce oil and gas, whereas a platform rig is a permanent drilling structure. Figure above shows a mobile offshore drilling unit, [Ref.2].

References:

1. http://www.encyclo.co.uk/define/satellite%20well
2. http://www.eagle.org/prodserv/EnergyNews14/hab.html