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Using the Top Drive PracticallyElectric or Hydraulic –The Choice is YoursWhether your specific drilling operation calls for directional, horizontal,underbalanced, air or gas drilling, reaming, running casing, well control,or fishing, the <strong>TESCO</strong> Top Drive can contribute in ways that will save timeand money. Here are some practical examples of what a <strong>TESCO</strong> Top Drive iscapable of and what that means to you.A <strong>TESCO</strong> Top Drive can connect to the drill string at any height inthe derrick and provide simultaneous reciprocation, rotation andcirculation of drilling fluids.• The ability to ream and backream with full stands.• Eliminates the need to pick up the kelly to begin circulation and rotation,thereby decreasing the risk of becoming stuck.• No need to break stands into singles for reaming.• No requirement to pump out singles with the resulting hole problems.The Top Drive can rotate the drill string both clockwise andcounter clockwise with highly controlled torque.• Ability to “rock” the drill string in order to break the static friction while“slide drilling”. This allows the drilling of extended horizontal sections inshallow wells.• Capable of making “on bottom” connections with the drill string,eliminating the need to re-orient the drill string in “slide drilling”.• Facilitates free-point and back-off operations during fishing.Double or triple stands of pipe can be made up in advance anddrilled in with the <strong>TESCO</strong> Top Drive, thereby reducing the numberof necessary connections by 50% or more.• In air or gas drilling, decreases the number of connections and thus the“blow down” time.• Decreases the amount of time that the hole is not underbalanced in UBDoperations.• Allows 20 or 30 meter core barrels to be drilled without a connection,decreasing the chances of a “jam-off”.The <strong>TESCO</strong> Top Drive allows for continuous fill up and/orcirculation while running casing.• Saves time filling casing.• Allows circulation, rotation, and reciprocation of casing.• Decreases circulating time and stuck casing risk.“Link Tilt” and “Extend” robotics assist in casing handling.• Increases safety and speed when running casing.• Reduces need for specialized casing running equipment.In the event of a kick, the well can be secured with the doubleball valve.• Provides a second alternative to traditional “stabbing valve” well controlprocedures.• Driller can shut-in the well without drill floor crew – even whiletripping.We at <strong>TESCO</strong> can make your rig more efficient, and a saferenvironment to work.• Automation of the rigs.• Safety improvements for rig floor crew.• Elimination of manual tongs to make up connections.• Quicker connections.• Ability to close the safety valve remotely at any height in the derrick.• Possibility to add Stabbing arm.• With the addition of Power slips, back up tongs are virtually eliminated.Electric Top DrivesAvailable from 400hp to 1350hp, <strong>TESCO</strong> permanent magnet orAC electric Top Drives are the ideal choice for modern rigs (land oroffshore) with sufficient electric power.Hydraulic Top DrivesAvailable from 475hp to 1205hp with self-contained AC overhyraulic or diesel prime movers, these units are the traditional choicefor portable installation or for re-powering older mechanical rigs.<strong>TESCO</strong> rental Top Drives are available from our International ServiceDivisions. These units can be economically shipped and quicklyinstalled in almost any rig worldwide. An experienced <strong>TESCO</strong> Top Drivetechnician is supplied with every rental unit to ensure the customerreceives maximum benefit from the Top Drive. Both hydraulic andelectric Top Drives are available for sale in new rig construction,rig upgrades and permanent installations. A selection of models,combined with accessories, on-site Installation supervision and factorytraining ensure that the customer receives real value for their <strong>TESCO</strong>Top Drive investment.Top Drives – Types and ModelsHydraulic150 HMI 475250 HMI 475250 HXI 700500 HS 750/1100500 HCI 1205650 HCI 1205Electric150 EMI 400250 EMI 400350 EXI 600500 ECI 900/1350650 ECI 900/1350750 ECIX 1350<strong>TESCO</strong>’s Hydraulic Top Driveoperating in Brazil.p a g e 4p a g e 5
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