LIDAN BRAKE SERVO SYSTEMS FOR OFFSHORE AND ONSHORE DRILL RIGS

Transcription

1 1(24) LIDAN BRAKE SERVO SYSTEMS FOR OFFSHORE AND ONSHORE DRILL RIGS Autodriller system Brake servo system Anticollision system Especially developed for upgrade of Drawworks with Band Brakes.

2 2(24) The Lidan autodriller and brake servo system includes: - Remote band brake servo control - Autodriller Feed off & rate of penetration control - Autodriller Weight on bit control - Anti collision system INTRODUCTION 1.0 Introduction Page 3 PRODUCTS Page Lidan ADS autodriller system Page Lidan DBS servo braking system Page Lidan BCS anti collision system Page Principal system DBS, ADS and BCS Page 8 EQUIPMENT DESCRIPTION Page Control console Page Brake actuator assembly Page Autodriller transmission assembly Page WOB electronic control cabinet Page Anti collision system Page Operator s Terminal Page Hydraulic power unit Page 14 OPERATION DESCRIPTION Page Brake control and travelling operation Page Drilling system operation Page Anti collision system operation Page 18 INSTALLATION AND TESTING 5.0 Installation & Testing Page 20 TECHNICAL SPECIFICATION 6.1 Technical specification Page Dimension drawings Page 23

3 3(24) 1.0 INTRODUCTION Short about Lidan Engineering. The company is linked back to 1909, when the Lidan Motor Company designed and manufactured marine winches driven by semi diesel engines. After a time span of about 75 years these winches developed into large hydrostatic driven mooring winch systems for offshore semisubmersible platforms. To-day the responsible company for offshore winches is Lidan Marine AB, while Lidan Engineering AB is responsible for diesel-hydraulic drive and braking control systems of drawworks for offshore/ onshore drilling and workover. Since Lidan Engineering installed the first Band Brake Control System on a Transocean semi-submersible drillrig in 1985, the company has included an Autodriller System and an Anti collision System to its product range. Through the years the company continuously has developed and improved these systems and has received DNV (Det Norske Veritas) type approval for the systems for application on drillrigs world wide. The systems comply with: 1. DNV-OS-E101 Offshore Standard, Drilling Plant, October NPD s Regulations relating to design and outfitting of facilities etc. in the petroleum activities (The facilities regulations), 3 September NMD s Regulations of 4 th September 1987, amended 2, March 1999, concerning construction of mobile offshore units, UK SI 1992:2932, The Provision and Use of Work Equipment Regulations, 1992, regulation 5(1) relating to initial integrity and purpose for which it is intended to be used.

4 4(24) 2.0 PRODUCTS The drawworks for land and offshore drillrigs are traditionally composed by a drum assembly, driven by SCR controlled electromotors through a chain transmission. The drum is disconnected by an air clutch. At lowering, the drum is controlled by two independent braking systems; the main brake and the auxiliary brake. The auxiliary brake is normally an Eddy Current Brake (ECB), which is connected to the drawworks main shaft through a coupling. The main brake consists of two brake bands, acting onto the drum rims, and controlled by a heavy steel lever through a linkage system Over the years, Lidan Engineering has gained a solid reputation for upgrading of drawworks of the band brake type, by marketing a unique band brake servo control system. Along with increased drilling complexity, improvement of drawworks control properties has become an important issue. The most significant are: - the Autodriller system, which aids the driller to maintain a steady weight on the drill bit (WOB) and a continuous line Feed Off in order to increase the drilling parameters and to save the bit wearing for fewer round trips. - the Block Control System, which protects for collision of the travelling block against the drillfloor, the crown block, racking arms or dolly retract failure - the Servo Control system of the band brakes, increases braking precision when controlling heavy loads at high speeds and, at the same time, the small, but rigid servo handle eliminates stress and physical workload to the driller, which is applied at operating the traditional heavy brake lever. There are several brands and types of Autodriller systems available on the market. While other Autodriller systems, require the ECB to be substituted by a Disc Brake, Lidan can offer the Autodriller still keeping the ECB auxiliary brake as is, to be utilized for the purpose it was originally designed for! This has been made possible because the Lidan system controls the drill line Feed Off by means of the existing brake bands. At the same time, in addition to the Autodriller system, Lidan can offer a Block Control and Band Brake Servo Control system.

5 5(24) When designing the Automated Driller system for drillrigs with the drawworks of band brake type in mind, the key issue was to create a high sensitive band brake actuator. The development work, with many improvements implemented gradually over the years, finally resulted in an in-line dual function servo brake actuator. It incorporates one active and one passive part. The active part is for responding on the hydraulic signals from the Autodriller system, as well as, when operating in tripping mode, the signals from drillers brake handle. The passive part is for an emergency fail safe brake to full stop function. This dual in-line actuator is the heart of the Lidan Autodriller Feed Off function, which has no analogues on the market. The Autodriller control functions and the Brake handle is on one common console, which, when it is time to add a new stand, the shifting from autodrilling to manual control simply is by pushing a button on the console. The console comes either as a pedestal or alternatively, as a panel for integration with a driller s main console. The Lidan Autodriller controls the Feed Off through the band brakes without any influence on the electric brake as is the case when drilling by hand. In order to prevent for too much of Feed Off, the driller often must apply a short moment of electric brake activation, with overheating problems as consequence! 2.1. Lidan ADS Autodriller system for land rigs, jack up and platform rigs is user-friendly and it s functions easy understandable. The ADS Autodriller system is designed for a high degree of precision in drum line pay out (Feed Off) and Weight on Bit (WOB) control. This will assure maximum Rate of Penetration (ROP) utilization, adjustable between m/h (on request up to 300 m/h). With a servo hydraulic encoder motor, linked to the drum shaft via a chain transmission and hydraulically connected to the brake actuator, a closed loop feed back system is created, which delivers an absolute steady Constant Speed drill line Feed Off. Co-ordinated with the WOB electronic function, the system keeps bit weight within very narrow limits, sometimes as little as +/-100 kg. Feed Off setting is stored during shift of drill pipes and setting of WOB is fully repeatable.

6 6(24) 2.2 Lidan DBS Servo Braking system is especially designed as an aid to increase drill floor work productivity and to improve driller s surveillance over the increasing number of instruments and systems around him. The DBS replaces the traditional solid steel brake lever by a small, but rigid, handle control. The objective with the DBS brake handle control is to mimic driller s habitual action with the mechanical brake lever and to preserve a direct feed back through the brake handle. This, in combination with an easy coordination to the eddy current brake control handle, will appeal to driller s confidence and feeling for hook load versus velocity. Comparing the drillers work with the steel lever, the brake handle virtually eliminates the physical effort required to control or stop the hook travel, especially when operating high loads. It also eliminates for fatigue injuries and accidences. E.g. the well known phenomena, when the steel lever, unexpectedly and violently, strikes down, triggered by the Crown O Matic top limit system, with the potential risk to hit the driller. The DBS Brake Actuator incorporates dual functions, one active and one passive. The active function is directed from drillers brake handle for general block travelling operations, or, when drilling in automated mode, from the ADS Autodriller system. The passive actuator, with its fail safe spring function, is triggered to apply automatically at a situation when, without driller s notice, an emergency situation is about to occur. The latest model, with the active and passive functions integrated in one compact in line actuator, is designed especially with land rigs in mind. With its reduced dimensions it fits into all types and sizes of drawworks with band brakes.

7 7(24) 2.3 Lidan BCS Anti collision System The Autodriller and Brake Servo system is prepared for simultaneous or later installation of an Anti-collision system. The Lidan BCS Anti collision System is supervised by calculated function of weight, velocity and current block position at down and up travel of the block. In order to keep the travelling block within stored speed limit profiles, a programmable logic controller directs the signals to the auxiliary electric brake for soft braking action. At approaching a preset limit distance to the floor, the crown block, or, if the racking arms accidentally are being moved into a collision risk area, the Electric Brake gets energized. If required, should not driller take action, the fail safe actuator becomes activated to bring the block into a full stop. All parameters are supervised by a Drillers Terminal with LCD display, positioned on the drillers console. The automatic Anti collision System works in parallel with driller s manual control of the electric brake and the band brake. Should the driller supersede the block limit profiles, the automatic system will interfere and support braking through the electric brake and the band brake. The automatic braking action is accompanied with an audible and visual alarm. This will alert the driller to increase his own manual braking activity, which in all cases override the automatic braking. In autodrilling mode the anti collision system will automatically stop of the Feed Off and apply the brake, when reaching the set position where the current drill pipe length is drilled off. The display menu automatically changes for autodrilling mode when switched On on the console. The travel limit settings for drilling the pipe can be set and stored accordingly.

8 SPRING BRAKE OFF ON Updated (24) 2.4 Principal system DBS, ADS and BCS BLOCK CONTROL OVERRIDE ALARM RESET BRAKE SERVO SERVO PRESSURE HPU ALERT OFF AIR MOTOR ON EL. MOTOR

9 9(24) 3.0 EQUIPMENT DESCRIPTION The LIDAN ADS Autodriller with DBS /BCS Brake Control system consists of following main components: 3.1 Operator s Control Console 3.2 Brake Actuator Assembly 3.3 Autodriller Transmission Assembly 3.4 Autodriller Electronic Control cabinet 3.5 Anti-collision electronic control cabinet 3.6 Operator s Terminal Console with LCD screen 3.7 Hydraulic Power Unit 3.1. OPERATOR S CONTROL CONSOLE The control console shall be positioned at the drillers work position. From the Control Console the driller directs the Brake Actuator and activates the Autodriller Feed off and WOB functions. The Anti collision system, if implemented, shall always remain On with the display menu showing either manual anti collision system mode or autodrilling mode. The console position shall conform to driller s comfortable reach to all control means: right hand on the Brake handle Controller for controlling the band brake, left hand on the Auxiliary Brake Controller for controlling the Eddy Current Brake. The driller shall have access to the foot pedals for throttle and power clips clutch. Simultaneously, he shall have free sight to drill floor and the major control instruments, particularly the Weight Indicator and the Stand Pipe Pressure Indicator.

10 10(24 The pedestal console is intended for standing driller. For seated driller, as option, a drillers chair with arm rest consoles is available. Normally, the direction for the Brake handle for Brake On position is to the right. This direction conforms to the direction of action of the (replaced) steel lever, thus keeping up drillers habitual reflexes. An adapter is welded to the servo actuator s brake arm for temporary housing of the steel lever, which shall be cut to an appropriate length and used only when adjustment of the brake band adjusting bolts is required. The Console s Panel also includes: - Pushbuttons and indication lamps for start and stop of the HPU electromotor and, for emergency use, in case of lost electric power, a second stand by pump, driven by an air motor. - Push button for Autodriller Feed Off with indication lamp (steady green) and Feed Off controller operated at deg turn for m/h Feed Off rate - Push button for Autodriller WOB with indication lamp (steady green) and blinking green light for WOB high tendency and WOB low tendency The read out for the Autodriller functions is from the Weight Indicator, with interface for adopting digital indication for WOB and ROP. The Control Console can be equipped with an operator s terminal with a LCD display and keyboard as integral part of the Anti-collision system, with Autodriller display, including digital read out of WOB (t/p), Feed Off (m/feet / h) and ROP (m/feet / h) BRAKE SERVO AUTODRILLER BRAKE ON HPU ALERT OFF ON SERVO PRESSURE FEED OFF AIR MOTOR ON OFF R.O.P W.O.B BRAKE OFF EL. MOTOR SPRING BRAKE

11 11( BRAKE ACTUATOR ASSEMBLY The brake actuator is of telescopic design with a dual (Active and Passive) function for minimum space requirements. The actuator shall be positioned in parallel with the drawworks low clutch and connected to the drawworks brake shaft. The Passive actuator is fail safe and acts by means of a set of cup springs, charged by hydraulic pressure from the HPU. The Active actuator is manually controlled from the hydraulic brake handle at normal pipe handling operations, while the Passive actuator will apply the band brake automatically in case of an emergency situation, or at pressing an emergency button on the Control Console. Active actuator On Passive actuator Off Brake Off Active actuator Off Passive actuator On For additional safety, the Brake Actuator is designed with extended stroke length to permit a full 90 deg stroke to permit brake action, as emergency, even in case of a broken brake bands.

12 12( AUTODRILLER TRANSMISSION ASSEMBLY The Autodriller Transmission Assembly consists of a compact servo hydraulic feed back motor with bracket assembly, for easy mounting at position on top of the eddy current brake. The feed back motor is equipped with a sprocket wheel and an air-clutch. A split sprocket is either welded or bolted to the fixed coupling hub on the eddy current brake shaft. The chain transmission links the feed back motor to the drum shaft and is equipped with an auto-lubrication system. 3.4 AUTODRILLER ELECTRONIC CONTROL CABINET. The Electronic Control cabinet shall be installed in safe area. The Control cabinet includes a programmable logic controller and ex-barriers and interface relays. The PLC is programmed to align deviation and control the Feed Off in order to keep the WOB on set target. External signals (torque, pressure or other options) will be accepted for controlling the Feed off in order to get maximum flexibility and drilling utilisation. The control cabinet includes a HPU alarms system and other control functions for safe operations of the Brake Servo System.

13 13( ANTI-COLLISION SYSTEM The ADS Autodriller electronic control cabinet may be extended to include a BCS Anticollision system. The BCS, as added item, will require increased computer power for the extensive calculating of speed, weight and distance to collision point and handling of a number of sensors and proximity switches. 3.6 OPERATORS TERMINAL DISPLAY The Operator s Terminal Display (standard with the BCS system, option for the ADS system) shall be mounted to the Driller s Control Console, with adjustable means for best viewing angle to the driller. The Operator s terminal includes: Stainless steel enclosure with front panel including LCD monochrome display and function keys. With the ADS Autodriller system, as integral part of the BCS Block Control system, the terminal is automatically switched over from Anti collision system display to Autodriller display when the push button Autodriller On is activated

14 14( HYDRAULIC POWER UNIT The Hydraulic Power Unit (HPU) consists of a Stainless Steel hydraulic reservoir, with all major electro-hydraulic and pneumatic valve equipment mounted on top of the tank. All interconnecting pipings and couplings are of stainless steel. The main pump is a submersed, vertically mounted Screw Pump, designed for working continuously 24 h/day at a calculated life time >10 years. The noise level is negligible. The pump is driven by an EExde Electromotor of 4,6 kw. For back up, it is installed a submersed vertical mounted Gear Pump, driven by an Air-motor. A water/oil cooler is connected to the drawworks cooling water supply system. The HPU, which is protected against splash water by a stainless steel top cover with transparent curtains, shall as standard be positioned close to the drawworks lower clutch side, behind the drawworks control console. Other position options are available depending on individual space situation.

15 15(24 4 OPERATION DESCRIPTION 4.1 BRAKE SERVO FOR BLOCK TRAVEL OPERATION: The DBS brake handle is controlled in near identical fashion to that employed for the conventional brake lever. The analogue property of the brake handle is designed with a high resolution for ultimate sensitivity at creep speed control in the handle. This feature makes it easy to identify the `sweet spot' where the load and the friction counter force reach equilibrium. The increased resolution is concentrated especially at this point, which in turn gives a direct feeling for `load in hand'. The brake handle governs the active function of the brake actuator, working on a brake arm on the drawworks brake shaft. For safety, a set of cup springs provides a fail-safe passive brake actuator function, standing by to trigger its spring force to apply the band brake. When applying the spring brake a sequential load-sharing function between the two actuator functions prevents for undesired brake reinforcement at the transition between the two braking modes. The fail-safe spring brake becomes activated: - At loss of hydraulic servo pressure - At loss of air pressure - At electric mains failure - On manual activation of the emergency stop palm button - When the crown limit setting is exceeded, at a signal from a Crown 'o Matic or other anti collision system options.

16 16( AUTODRILLING OPERATION: From the Control Console the driller directs the Brake Actuator and activates the Autodriller Feed off and WOB functions. Drillers transition from Autodrilling mode to Pipe handling mode is instant, which is an important aid to reduce the effect of a drillstring torqueing up. FEED OFF MODE The qualities of the Autodriller function goes back to the performance of the servo brake system as executive body. The extraordinary creep speed braking characteristics of the brake servo and brake actuator system makes the ADS Autodriller system to a tool for a highly increased drilling efficiency. The Feed-Off system is a fully hydraulic system, integrated with the brake servo actuator system. The Feed Off system works as a regulator loop composed by an integral system of 1) The active brake actuator, hydraulically connected to the servo hydraulic encoder motor and mechanically connected to the brake shaft and the brake band linkage. 2) The hydraulic encoder motor, which is mechanically connected to the wire rope drum via a chain transmission, provides feed back information of the motion of the wire rope drum to the active brake actuator The feed back system delivers an absolute steady Constant Speed drill line Feed Off. The hydraulic encoder motor is powered by the HPU and its rotating speed is controlled from drillers Control Console by means of the Feed Off control knob. The adjusted setting of the R.P.M. of the encoder motor is proportional to the Feed Off Rate on hook. The Feed Off can be adjusted from 0 to120 m/hour (as option up to 300 m/h). The equilibrium point, where the drum rotation aligns with the Feed Off rate, the Sweet Spot, is automatically and immediately established, independent of string weight and Feed Off speed. This feature can easily be observed by temporarily putting the old mechanical lever into the adaptor to demonstrate how the indicator distinctly enters into its equilibrium position at an angle which corresponds to the actual load in the string. Always, from hold through increasing Feed Off speed, it can be noticed a near to identical angle of the indicator, oscillating gently around the equilibrium angle, which in turn visualizes that very stable and even dynamic forces are applied to the string and the brake linkage. In fact, by using the Feed Off constant speed control as a single means for drilling, the driller would consider it as an efficient drilling assist tool per say!

17 17(24 Should a drill break happen, the regulated Feed Off decent will simply stay firm a drop in bit weight only would be indicated on the Weight Indicator. 2. WOB MODE: The driller uses the Feed off mode until he reaches the desired WOB, indicated on the Weight Indicator. At pressing the WOB On push button, the WOB is set and the Autodriller computer becomes active. The bit weight remains initially within a preset span e.g. +/- 300 kg. Along with the computer s calculating against a dedicated algorithm, the fluctuation of the bit weight successively gets reduced to as much as 50% or less, which means a WOB set target value, e.g. 10 ton +/- < 150 kg. Two indication lamps remain steady green lightning confirm that WOB is within permitted span. If by any reason the WOB should come outside of the preset span on plus or minus side, he corresponding indication lamp will start flashing, i.e. should the green lamp for WOB low start to flash, it will notice the driller to increase Feed Off. Typically, WOB low flashing would apply in case of a drill break, thus immediately alerting the driller about the situation! Within a few seconds the drilling mode may be switched over to hoisting mode, e.g. when it is time to shift for a new drill pipe stand, or, in an emergency situation, should a torque up tendency call for an urgent drill string pull up. By pushing the Feed Off button, the Autodriller function interrupts, indicated by the shut off of the green light indications. The driller may now release the brake by means of the servo control handle and operate the clutch and drawworks throttle as usual. When again driller wishes to resume drilling, the Feed Off rate and WOB setting remains stored as was previously adjusted and he simply proceeds the drilling operation by pushing ROP and WOB on.

18 18( ANTI COLLISION SYSTEM OPERATION The anti collision system is operated from the Operator s Terminal, which is mounted on an adjustable arm on the Control Console. Setting of the desired set points is by travelling the travelling block to corresponding positions and pushing a button for setting of the floor, crown, the lower and upper racking arm positions, dolly retract system, etc. The Anti collision system as Floor saver : The LCD display indicates the travelling speed in m/s (feet/s) and distance to Floor in meters (feet). When superseding the calculated weight versus speed and distance to a potential collision property, a buzzer alarm alerts the driller that the electric brake becomes initiated and simultaneously calls for his attention to take action for manual braking. If driller is not taking action, the PLC continuously directs the signals to the auxiliary brake (the electric brake) for soft and successive braking, in order to maintain the travelling block within stored speed limit profiles. At approaching the preset limit distance to the floor at slow speed, a signal is given for the brake servo actuator to energize, which brings the block into a full stop at the set limit. An override function is established by pushing a function key. The buzzer alarm is pulsating to alert driller, as well as is an override displayed on screen. Another function key gives information about elapsed Ton-Miles. The Anti collision system as Crown saver: Interfaced to the SCR system and driller's foot throttle, the Anti collision system surveys the velocity of the block at up-travel. To remain within the speed profiles, driller s foot throttle overrides and shuts down until the speed corresponds to the profile.

19 19(24 In case of a high/high speed approach, the throttle shut down triggers correspondingly earlier. At close to final approach, the slow down is supported by activating the electric brake. At a normal low speed rate the driller proceeds hoisting for his final full brake stop. Should he exceed the set limit point, the brake servo actuator triggers to apply the band brakes, simultaneously as the clutch air pressure is released. If required, he may proceed at override, which is switched on from the driller s console. To protect from collision at override mode, for additional safety, the existing toggle valve (Crown O Matic) may be used, set at a permitted ultimate high block level. At this point the toggle valve triggers a pilot signal to the spring actuator to apply the band brake for a full stop. Although the encoder for the block travel is of the absolute type, the block position is continuously monitored by an up-date sensor, positioned at the guide rail half way up the travelling distance, which will inform the computer that correct setting positions remain firm. The Anti collision system for Racking Arms and Dolly Collision protection: Interfacing the sensors for the upper and lower racking arms, the system will take action, should a racking arm become extended into collision risk area. The Anti collision system will alert alarm to notice the driller and at the same time, if the driller is not reacting, a slow down to stop procedure becomes activated. Interface may be provided to protect also from collision to the drill string compensator or to the dolly. Autodriller mode display configuration. When pushing the Autodriller Feed Off push button, the terminal display automatically changes for corresponding information for the Autodrilling mode: - ROP in m/hour (feet/hour) - Feed Off in m/hour ( feet/hour) - WOB in t (pounds) - WOB variation bar graph (low or high span dependent of primary/secondary setting) - Drill pipe drilled off distance to floor set point - Elapsed time since start of drillpipe drill off - Expected time for drillpipe drilled off

20 20(24 5 INSTALLATION & TESTING Upon agreement Lidan service personnel or approved Lidan representatives may provide installation of the equipment. Installation may be performed either during ongoing drilling activities, where final hook on is done at a time window availability of maximum 6 hours, or during the time period for demobilisation / mobilisation, what ever suits the rig activity schedule. Upon request Lidan can propose installation and quote installation material: Installation : Mechanical installation comprises: Hydraulic Power Unit Brake Actuator Feed off Servo motor Control Console Piping / hoses interconnection: Hydraulic Power Unit Brake Actuator Feed off Servo motor Control Console Interface & interconnections: Installation material: Assistance: drawworks Low / High Clutch (air) drawworks Relay Valve (air) drawworks Release Valve (air) drawworks Toggle Valve (air) Lidan supply (optional): Installation material ( hoses, couplings etc) as well as installation tools may be quoted upon separate agreement to accompany the delivery of the system equipment. Surplus installation material and Lidan installation tools shall be sent back by Buyer to Lidan or Lidan representative at Buyers cost, immediately after completed and approved installation. Assistance performed by rig personnel, free of charge for the Seller Typical assistance required: filling of hydraulic oil into HPU water connection to oil cooler HPU

21 21(24 Welding: fixation of base plate, fixation of control console welding of protection covers Electric work: electromotor connection switch on/off electromotor connection emergency stop button to electromotor indication lamps connection Buyers supply: Electromotor starter with remote control. Electric voltages supply 24 V DC. Interconnection of switches and indication lamps on Lidan control console. Wiring to Lidan marshalling junction box One Barrel (200 l) Hydraulic Oil Shell Tellus Oil S 46 or equivalent. Time for installation: Testing: Time for installation is by experience 3-5 days at site, however, this time can become extended due to unexpected work impediments, etc. Before delivery, all equipment delivered by Lidan is subject to a thorough FATtest procedure. The approved FAT-test document is a part of the delivery. After approved installation on the rig, testing of the equipment and training of drill crew will be performed to the rig personnel under supervision of Lidan personnel or representative personnel approved by Lidan. Due to the very userfriendly operation properties, the training procedure normally takes less than an hour until full drilling activities is resumed.

22 22(24 6 TECHNICAL SPECIFICATION 6.1 Technical specification Hydraulic Power Unit : Power supply :... 4,6 kw Voltage and frequency specified at order. (400 VAC 50/60 Hz) Oil tank volume: l Oil quality:... Shell Tellus Oil S 46 or equivalent Normal working pressure: Bar Cooling water supply:... ½ BSP, to be connected to fresh water supply for drawworks electro motors. Cooling water consumption: LPM Air supply: Bar, Connection ¾ BSP. Air quality:... ISO Class or better. Air Consumption:... - Normal working mode max 50 NL/Min. - With backup air motor running 3600 NL/Min Dimensions (lxbxh): x 700 x 1125 mm Weight: Kg Installation:... min 150 mm from wall. Front and right or left side accessible for maintenance. Location:... Adjacent to the drawworks. Contact Lidan for advice and layout. Brake actuator: Dimensions (lxbxh) x 300 x 280 mm Weight: Kg Control console: Dimensions (lxbxh) x 283 x 992 mm Weight: Kg Location alternatives:... - On open drillfloor or in a drillers cabin, positioned at any distance from the drawworks, for standing or seated driller. Design alternatives:... - Control panel to be inserted in drillers main console. - Control Console on pedestal - A left and right hand consoles mounted on a gliding/rotated chair, with added control means for auxiliary brake, clutch control, etc. Autodriller encoder motor: Dimensions (lxbxh) x 380 x 250 mm Weight: Kg Location:... On top of auxiliary brake. (Installation kit for Baylor brake available) Autodriller WOB electronic control cabinet : Power supply:... 24V DC ±15%, 6A Dimensions (lxbxh) x 400 x 200 mm Weight: Kg Location:... Safe area, (Zone 1 as option) Interface:... Hook load by hydraulic sensor or 4-20 ma signal. Anticollision terminal display: Dimensions (lxbxh) x 200 x 100 Weight:... 5 Kg Power supply:... Through electronic control cabinet Anticollision electronic control cabinet: Dimensions (lxbxh) x 600 x 250 mm Weight: Kg Power supply: V AC, 6A Location:... Safe area Interface:... Hook load by hydraulic sensor or 4-20 ma signal Auxiliary brake, SCR and clutch control by potential free contacts.

23 SERVO PRESSURE EL. MOTOR ON SPRING BRAKE OFF AIR MOTOR OFF ON R.O.P FEED OFF W.O.B Updated ( Dimension drawings Control console (Drawing no 20707) SERVO PRESSURE FEED OFF R.O.P W.O.B SPRING BRAKE EL. MOTOR AIR MOTOR OFF ON ON OFF Brake actuator assembly (Installation drawing no 20884)

24 24(24 Hydraulic power unit (Drawing no 10931) Autodriller transmission assembly (Installation drawing no 20962)