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Double motors directly drive the drum without reduction gear shift mechanism, coupling and lubrication system. Compared to the traditional draw works, the size is 40% smaller, the weight is 25% lighter and maintenance workload reduces by 80%.
Direct Drive
AC VFD drive with fast line safety protection, automatic position control and upper & lower travel protection for travelling block.
Equipped with wire line protection system (WPS) to improve the service life.
Equipped with direct acting and floating hydraulic disc brake with quick response, automatic clearance adjustment and integrated hydraulic source.
Equipped with a new generation of integrated automatic driller’s control software system, including ROP, WOB, deltaP (pressure difference), torque control and other modes.
Technical Specefications
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EPHH can provide a full series of 350HP-4000HP drawworks to meet the requirements of different rigs, with load capacity from 90 to 900 metric tons.
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Drawworks drive mode includes AC VFD, DC SCR drive and mechanical drive respectively.
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One step parallel gear (or planetary gear) single shaft driven-AC VFD drawworks is reliable at work with small size, light weight and less maintenance work.
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Some drawworks also adopts AC motor to drive directly.
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The main brake is band brake or hydraulic disc brake. Auxiliary brake has been equipped with eddy current brake.
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The drawworks is also equipped with separate AC VFD device and computer auto control system, as well as the auto bit feeding function, and the functions of real time control, monitoring and analysis of tripping in condition and drilling condition, to realize optimizing drilling operation.