For more information, visit:
www.prysmiangroup.no / www.draka.no
What links the oil and gas
Industry from end to end?
As the worldwide leader in the cable industry,
Prysmian Group believes in the effective, efficient
& sustainable supply of energy and information as
a primary driver in the development of communities.
With this in mind, we provide major global organisations in many industries with best-in-class cable
solutions, based on state-of-the-art technology.
Through two renowned commercial brands
– Prysmian and Draka – based in almost 100
countries, we’re constantly close to our customers,
enabling them to further develop the world’s energy
and telecoms infrastructures, and achieve sustainable, profitable growth.
Draka Norsk Kabel, a part of the Prysmian Group, is
your source for higher quality, longer lasting top
drive service loops. The Draka BostDrive™ family of
Draka Norsk Kabel
website: www.prysmiangroup.no / www.draka.no
BostDrive™ Service Loops
Your source for highest quality and longest lasting top drive
top drive service loops and components has
been specifically designed by Draka engineering
specialists to eliminate or significantly mitigate
the failure mechanisms common to the hose
style loops currently employed. Utilizing the
extensive global cable manufacturing
experience and technical expertise of the
Prysmian Group in successfully designing cables
for such rigorous flexing applications as
elevators, robotics, mining, and crane
applications, these loops are designed to have a
life expectancy of multiple times that of hose
style loops, which are not intelligently designed
for continuous flexing applications.
Linking communications to communities
Bostdrive™ SErvice Loops
Draka Norsk Kabel, a part of the Prysmian Group, is your
source for higher quality, longer lasting top drive service
loops. The Draka BostDrive™ family of top drive service
loops and components has been specifically designed by
Draka engineering specialists to eliminate or significantly
mitigate the failure mechanisms common to the hose
style loops currently employed. Utilizing the extensive
global cable manufacturing experience and technical
expertise of the Prysmian Group in successfully designing
cables for such rigorous flexing applications as elevators,
robotics, mining, and crane applications, these loops are
designed to have a life expectancy of multiple times that
of conventional hose style loops.
The Draka BostDrive™ designs take a completely different
approach, which is to treat the loop as a complete
composite cable, not a number of cables pulled into a
hose. By doing so, the stresses on the individual
components can be predicted and controlled by the
proper use of cable design and assembly techniques for
continuous flexing applications. Cabling lay lengths and
directions of lay of components are adjusted to minimize
torque and rotation, which could cause corkscrewing.
Each component (power conductor, instrumentation pair,
control conductor, etc.) is specifically designed for
continuous flexing, and the resulting assembly of these
components takes into consideration the location of each
component within the cable to insure that the imposed
stresses during long term operation will be within design
guidelines for long life. Each BostDrive™ cable is
specifically designed for the particular drive to be
employed by the user, as well as the environment it will
encounter.
– Instrumentation pairs will employ individual shields KEY FEATURES
consisting of copper braid in lieu of the standard which consist of an overlapped aluminum/
– The cable is composed of individual components, or shields
polyester backed tape plus a drain wire. The higher –
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groups of conductors, pairs, etc., in accordance with
the requirements of the drive. Each component (power conductor, instrumentation pair, control conductor, etc.)
is specifically designed for longer life under continuous flexing conditions.
Hose style loops, constructed in the conventional
manner, consist of a high quality industrial hose
with standard cable components configured to the
top drive requirements. The loops are potted at each
end to prevent ingress of moisture and chemicals.
Components can be connectorized to customer
requirements to facilitate ease of installation.
All loops are fully tested prior to shipment.
Hose Style Bostdrive™ Loops (Better)
Hose style BostDrive™ loops consist of a high quality
industrial hose with BostDrive™ components in lieu of
standard use cables that are typically provided in the
conventional hose style loops. These components are
specifically designed for extended life when subjected to
the high level of continuous flexing seen during drilling
operations. Torque balance constructions resist twisting,
pigtailing or corkscrewing. The components exiting the
breakout assembly will be individually armored, and will
be sheathed with an ester based mud resistant (MR)
jacket, as required for Zone 1 hazardous locations.
of a double MR (Mud Resistant) jacket with an aramid fiber braid between the layers to provide tensile
strength, as well as superior resistance to cut through and abrasion. The aramid fiber braided strength
Bostdrive™ Cable service Loops (Best)
member is torque balanced and provides twist
resistance to minimize any rotation. This jacket is also highly resistant to oils, solvents, moisture, sunlight, and drilling fluids, including ester based muds.
BostDrive™ cable loops provide the ultimate solution for
longer life and higher reliability in service loop applications.
These BostDrive™ designs take a completely different
design approach as compared to conventional loops. These
cable loops are designed and manufactured as complete
composite cables, not a number of cables pulled into a hose.
By doing so, the stresses on the individual components can
be predicted and controlled by the proper use of cable design
and assembly techniques for continuous flexing applications.
The cables are constructed in such a manner as to minimize
torque and rotation, which causes corkscrewing.
– As the BostDrive™ loop is a cable, the ampacity of
to a minimum tensile strength of 20,000 lbs. This is well above the safety factor of seven imposed by DNV and ABS for overhead loads.
Hose Style Loops (Good)
conductivity of the braid provides superior shielding,
even at very high frequencies, and is long lived.
– The outer jacket of the BostDrive™ cable is comprised
The components exiting the breakout assembly will be individually armored, and will be sheathed with an ester based mud resistant (MR) jacket, as required for Zone 1
hazardous locations.
Instrumentation pairs will employ individual shields consisting of copper braid in lieu of the standard shields which consist of an overlapped aluminum/polyester backed tape plus a drain wire. The higher conductivity
of the braid provides superior shielding, and is not vulnerable to the deterioration under continuous flexing, which is common to the tape shielded designs.
The mechanical hangoff system is designed to be compatible with current hangoff systems used by top drive manufacturers.
The BostDrive termination assembly has been certified Draka service loops are offered in a variety
of forms, generally considered as “Good”,
“Better”, and “Best” designs in order
to accommodate a broad spectrum of
customer requirements.
power conductors is based on “free air” ratings, while proper engineering guidelines require that, if the cables are installed in a hose or conduit, a derating factor of
approximately 0.8 should be applied to the “free air” ampacities. This is due to the effect of the air inside the hose or conduit acting as a thermal insulation, and reducing the rate of heat conduction away from the
hot conductors. As a consequence, for a given ampacity,
BostDrive conductors will run cooler than those
installed in a hose, or, at an equivalent temperature, will allow for higher ampacity.
Each component (power conductor, instrumentation pair,
control conductor, etc.) is specifically designed for continuous
flexing, and the resulting assembly of these components
takes into consideration the location of each component
within the cable to insure that the imposed stresses during
long term operation will be within design guidelines for
long life.
Each BostDrive™ cable is specifically designed for the
particular drive to be employed by the user, as well as the
environment it will encounter. The components exiting the
breakout assembly will be individually armored, and will
be sheathed with an ester based mud resistant jacket, as
required for Zone 1 hazardous locations.
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