DESIGN FEATURES
Bennevis is a Self-propelled, self-elevating Jack – up drilling rig
with cantilevered drill-floor and derrick thus combining the oceangoing
capability of a normal ship with the proven drilling
performance of a self- elevating platform.
This Drilling unit has an ideal configuration to carry out
exploratory and development drilling, work-over and interventions
on offshore oil and gas wells.
This exceptionally maintained Rig was built on the Clyde in
Scotland in 1971 and has been upgraded on a regular basis to
meet operators’ ever-changing requirements. For example, the
unit was converted from slot – type to cantilever – type drilling
unit in 1985 and this cantilever was subsequently extended in
1992 to give now a maximum drilling area of 60 ft outreach by 20
ft transversely. In 201 two AC engines CAT D-399 were replaced
by two new engines CAT 3516 B to increase the performance of
the rig.
Bennevis has successful track record within the offshore industry
and is an ideal unit for use in either drilling, side–tracking,
workover, well maintenance or well repairs.
Bennevis was built and maintained under ABS (American Bureau
of Shipping) classification society rules for Self-propelled , selfelevating
drilling units, IMO MODU and international Load-line
rules and is registered in the Republic of Panama.
Maximum drilling depth is 20,000 ft. Water Depth range for
drilling is 250 ft (maximum) to 20ft (minimum). Large (51 ft X 29.5
ft) rectangular auxiliary footings. The top100 ft of leg (in two
sections) can be removed for increased strength and stability
during world- wide ocean voyages.
OPERATING LIMITS
When in transit, maximum allowable wind speed is 100 Knots.
When drilling, maximum allowable wind speed is 50 knot with 20 ft
waves and 1.5 knots current. Operations can be continued up to
70 knot wind speed, 30 ft waves and 1.5 knot current with reduced
cantilever substructure load. When wind speeds exceeded 70
knots, if elevated, normal operations are stopped and the
extended cantilever is moved forward.
PRINCIPAL DIMENSIONS
297ft
141ft
22ft
224.5ft
356 ft
Length overall
Breadth overall
Hull depth at side
Minimum Depth afloat (keel to top of derrick)
Total leg length
Leg centers
Longitudinal
Transverse
Leg chord centers
Maximum transit draught
Max transit displacement
Helicopter rotor diameter
124ft
103ft
20ft
17.75ft
15077ST
62ft
Deck cranes: Sea King, Two to part, one to starboard.