Tesco Top Drive Equipment Life Cycel Manual - English (Book).pmd

Chapter 3The Drillers PanelDescription:The drillers panelis a stainless steelenclosureequipped with allof the controls,indicator lights,mounts, gaugesand connectorsrequired to operatethe top drive fromthe driller’sposition. All of thecontrols are 24volts DC electricover hydraulic. The two main cables to the panel are37 pin conductor cables with each wire serving a specificfunction. One 37-pin cable connects the power moduleto the driller’s panel and the other connects the top drivewith the driller’s panel. The four smaller cables are 4 or5 pin Amphenol connectors which control input to thesafety interlocks, overrides and digital gauges for quilltorque and RPM.Positioning:When deciding whereto mount the driller’spanel it is importantthat your view of the rigfloor from the driller’sposition is notobstructed and thatyou can reach thecontrols well enough tooperate the drawworks and top drive simultaneously.All of the cables to the panel should be routed in such amanner that moving parts will not damage them andthey should be elevated from the floor.Instrument Gauges:There are two digital gauges on the driller’s panel, theRPM Gauge that meters quill rotation and theRosemount Gauge, which reads quill torque. Separatefrom the driller’s panel is the Hydraulic PressureGauge, which reads the closed loop pressure in psi.The RPM Gauge gives an exact reading of the quillspeed.The Rosemount Gauge receives a milliamp signal froma pressure transducer located on the top drive. Thetransducer measures the differential between the highand low pressure sides of the top drive hydraulicmotor(s). This measurement gives you the mostaccurate torque reading while drilling, when thehydraulic oil in the loop is in a high flow state.The Hydraulic Pressure Gauge is used primarily toset the torque reliefs, which control the amount of torquethat can be applied to the quill. This gauge is also veryaccurate when making and breaking connections, whenthe hydraulic oil in the loop is in a semi-static conditionand pressure losses are at a minimum.Indicator Lights:There are indicator lights installed in the driller’s panelreminding you that a function is, or has been performed.The response to an illuminated indicator light shouldbe:Stop - Why it is illuminated and how will it effectfurther operations?There are indicator lights for the following:DC Power This green light should be illuminated at alltimes, indicating that the power supply to the driller’spanel is on.Grabber When the grabber is closed, the light willcome on and will not go off until ‘grabber open’ isselected.Valve When the mud saver valve is closed, the lightwill come on will not go out until ‘valve open’ is selected.Page 8 Top Drive Rig Floor Safety Orientation Doghouse Manual