1(24)
Updated 2005-01
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
2(24)
Updated 2005-01
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
2.1
2.2
2.3
2.4
Page 4
Lidan ADS autodriller system
Lidan DBS servo braking system
Lidan BCS anti collision system
Principal system DBS, ADS and BCS
EQUIPMENT DESCRIPTION
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Page 9
Control console
Brake actuator assembly
Autodriller transmission assembly
“WOB” electronic control cabinet
Anti collision system
Operator’s Terminal
Hydraulic power unit
OPERATION DESCRIPTION
4.1
4.2
4.3
Page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 12
Page 12
Page 13
Page 13
Page 14
Page 15
Brake control and travelling operation
Drilling system operation
Anti collision system operation
Page 15
Page 16
Page 18
INSTALLATION AND TESTING
5.0
Installation & Testing
Page 20
TECHNICAL SPECIFICATION
6.1
6.2
Technical specification
Dimension drawings
Page 22
Page 23
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
3(24)
Updated 2005-01
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 2000.
2.
“NPD´s Regulations relating to design and outfitting of
facilities etc. in the petroleum activities (The facilities
regulations)”, 3 September 2001.
3.
“NMD´s Regulations of 4th September 1987, amended 2,
March 1999, concerning construction of mobile offshore
units, § 22”.
4.
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
4(24)
Updated 2005-01
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
5(24)
Updated 2005-01
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 0-120 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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
6(24)
Updated 2005-01
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
7(24)
Updated 2005-01
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
8(24)
Updated 2005-01
2.4
Principal system DBS, ADS and BCS
ALARM RESET
BLOCK CONTROL
OVERRIDE
ON
OFF
ON
AIR MOTOR
HPU ALERT
EL. MOTOR
OFF
SERVO
PRESSURE
SPRING
BRAKE
BRAKE SERVO
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
9(24)
Updated 2005-01
3.0
EQUIPMENT DESCRIPTION
The LIDAN ADS Autodriller with DBS /BCS Brake Control system consists of
following main components:
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.1.
Operator’s Control Console
Brake Actuator Assembly
Autodriller Transmission Assembly
Autodriller Electronic Control cabinet
Anti-collision electronic control cabinet
Operator’s Terminal Console with LCD screen
Hydraulic Power Unit
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
10(24
Updated 2005-01
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 0-270 deg turn for 0 – 120 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
FEED OFF
OFF
ON
SERVO
PRESSURE
AIR MOTOR
R.O.P
ON
W.O.B
OFF
BRAKE
OFF
EL. MOTOR
SPRING
BRAKE
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
11(24
Updated 2005-01
3.2
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
12(24
Updated 2005-01
3.3
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
13(24
Updated 2005-01
3.5
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
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
14(24
Updated 2005-01
3.7
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
15(24
Updated 2005-01
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
.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
16(24
Updated 2005-01
4.2
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!
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
17(24
Updated 2005-01
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”.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
18(24
Updated 2005-01
4.3
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
19(24
Updated 2005-01
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”
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
20(24
Updated 2005-01
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:
drawworks Low / High Clutch (air)
drawworks Relay Valve (air)
drawworks Release Valve (air)
drawworks Toggle Valve (air)
Installation material:
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:
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
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
21(24
Updated 2005-01
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:
Time for installation is by experience
3-5 days at site, however, this time can
become extended due to unexpected
work impediments, etc.
Testing:
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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
22(24
Updated 2005-01
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:......................... 150 l
Oil quality: ................................ Shell Tellus Oil S 46 or equivalent
Normal working pressure: ......... 34 Bar
Cooling water supply: ............... ½” BSP, to be connected to fresh water supply for drawworks electro motors.
Cooling water consumption: ..... 15 LPM
Air supply: ................................. 6-10 Bar, Connection ¾” BSP.
Air quality: ................................ ISO 8573-1 Class 6.4.3 or better.
Air Consumption: ...................... - Normal working mode max 50 NL/Min .
- With backup air motor running 3600 NL/Min
Dimensions (lxbxh):................... 600 x 700 x 1125 mm
Weight:....................................... 170 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) .................... 1245 x 300 x 280 mm
Weight:....................................... 125 Kg
Control console:
Dimensions (lxbxh) .................... 478 x 283 x 992 mm
Weight:....................................... 40 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) .................... 500 x 380 x 250 mm
Weight:....................................... 45 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) .................... 400 x 400 x 200 mm
Weight:....................................... 15 Kg
Location: .................................... Safe area , (Zone 1 as option)
Interface: .................................... Hook load by hydraulic sensor or 4-20 mA signal.
Anticollision terminal display:
Dimensions (lxbxh) .................... 300 x 200 x 100
Weight:....................................... 5 Kg
Power supply:............................. Through electronic control cabinet
Anticollision electronic control cabinet:
Dimensions (lxbxh) .................... 800 x 600 x 250 mm
Weight:....................................... 50 Kg
Power supply:............................. 220V 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.
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
23(24
Updated 2005-01
6.2
Dimension drawings
W.O.B
SERVO PRESSURE
OFF
ON
EL. MOTOR
SPRING
BRAKE
SERVO PRESSURE
AIR MOTOR
OFF
ON
R.O.P
FEED OFF
Control console (Drawing no 20707)
FEED OFF
R.O.P
W.O.B
SPRING
BRAKE
AIR MOTOR
OFF
ON
EL. MOTOR
ON
OFF
Brake actuator assembly (Installation drawing no 20884)
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se
24(24
Updated 2005-01
Hydraulic power unit (Drawing no 10931)
Autodriller transmission assembly (Installation drawing no 20962)
_________________________________________________________________________________________
Lidan Engineering AB
JAKOBSTORP
S-531 98 Lidköping
SWEDEN
Phone: +46-(0)510 485570
Fax: +46-(0)510 210 18
e-mail: lidan@lidaneng.se
www.lidaneng.se