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Traveling Block Controller Display
Features
Crown Protection
Derrick designs generally incorporate extra space at the crown area
to allow for safer operation of the traveling block in an area that
is hard for the driller to see, and also to allow for potential
traveling block overrun of the upper mechanical stop caused by high
block ascending speeds near the crown. Fitting portable top-drives
to rigs reduces this extra space increasing the possibility of the
traveling block impacting the crown. By installing the Traveling
Block Controller, safe and accurate operation of the traveling block
is maintained to the maximum upper block travel limit. The Traveling
Block Controller eliminates the problem of overrunning the top stop
by monitoring and controlling the blocks ascending velocity when the
traveling block is being operated near the crown. This allows the
traveling block’s upper travel limit to be safely moved closer
to the crown, eliminating the necessity of adding extra derrick
height.
Floor Protection
Protecting the floor has always been difficult because block speed
must be continually monitored and controlled to prevent the
drawworks brakes from being overrun. Because the Traveling Block
Controller is an intelligent kinetic energy monitoring system (kems)
with an added "Soft Stop" feature, it ensures that the
safe and accurate operation of the traveling block is maintained all
the way to lower block travel limit. When the traveling block is
descending, the TBC monitors the block’s position and speed
against the hook load, if the downward speed is greater than the
preset drawworks brake capacity parameters, the magnetic brake is
activated slowing the blocks descending velocity. When the traveling
block reaches the absolute lower limit, the drawworks mechanical
brake is set.
System Operation
The TBC continually monitors block position, velocity and hook
weight. If the traveling block’s UPWARD velocity versus
distance from the upper limit is too high, the TBC reduces the block’s
speed by reducing the signal to the driller’s foot throttle
control. When the block has slowed to the desired speed, the signal
to the foot throttle is returned. If the traveling block’s
DOWNWARD speed versus position from the lower limit is too high, the
TBC reduces the block’s speed by energizing the magnetic brake.
The TBC also calculates the stopped position of the block if the
mechanical brake were to be set. If this stopped position reaches
the low travel limit, the TBC sets the mechanical brake. If the
traveling block reaches its upper or lower travel limit, the TBC
sets the drawworks brake, stopping the traveling block. By providing
a controlled slowing, or “Soft Stop”, of the traveling
block as it approaches it’s upper or lower travel limit, the
problem of overrunning the top or bottom stop is eliminated. Also
eliminated are the potential hazards normally associated with
suddenly stopping a fast ascending, lightly loaded, traveling block.
Specifications
Power: Nominal: 115/230VAC 50/60Hz 135 to370VDC Brownout: 95 to 264VAC, 47 to 400HZ
Operating Temperature: -40°to+185°F(-40°to +85°C)
The TBC system meets HSE, DNV & NPD safety and construction
requirements for installation on land or offshore rigs. The TBC system
does not require a purge system. The TBC can interface with the
Innovative Electronics FIRMS® (Fully Integrated Rig Management
System), the crown TV system, rig computer systems, logging computer
systems, and can be programmed to provide anti-collision capability for
the RBS, automatic pipe racker, or Iron Roughneck. An auto-drilling
option is also available. The TBC can be supplied in various
configurations depending on requirements. Systems are available with or
without cables and/or junction boxes, for permanent installation or for
moving from site to site. These components can be combined with other
Innovative Electronics packages for complete consoles containing both
hydraulic and electronic gauges and instruments.
The information and data on this site is accurate to the best
of our knowledge and belief, but is intended for general information only.
Applications suggested for the materials are described only to help readers
make their own evaluations and decisions, and are neither guarantees nor to be
construed as express or implied warranties of suitability for these or other
applications. Innovative Electronics makes no warranty either expressed or
implied beyond that stipulated in Innovative Electronics Standard Terms and
Conditions of Sale.
