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ROVCON Tie-in System
FMCs ROVCON ROV-based tie-in and connection system is designed
for both first-end and second-end tie-in of flowlines and
umbilicals. ROVCON is attached underneath a work-class ROV. The
tie-in skid package performs tie-ins using two winches. The
stroking cylinders conduct the final pull-in and closing of the
connector. The system includes a set of ROV-operated tools for hub
preparation prior to connection.
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ROVCON Mk 2
The skid package is controlled from a compact, briefcase-sized
control unit on the surface through the ROVs primary control
system.ROVCON operates multibore and monobore collet connectors up
to 12 3/4 OD for Mk1 and up to 16 OD for Mk2.The skid package can
also activate collet connectors after installation of a horizontal
rigid spool.The system includes ROV-operated tools for hub
preparation, cleaning and inspection.The system can be deployed
from a surface vessel or drilling rig.
Main system components
Permanent subsea equipment:Termination head on each end of the
sealine/ spool piece.Inboard hub permanently installed on subsea
structure.
Tie-in and connection equipment:Tie-in skid package with
hydraulic functions to pull in the line and to stroke and close the
connector attached underneath the ROV.Anti-reaction flying
interface to provide an inboard hold during pull-in, stroking and
connection.
Additional ROV tools and equipment:Hub cleaning and seal
replacement tool (HCSRT).Hub inspection camera used to inspect the
seal face.Tool elevator mounted on the ROV and used to lower the
hub cleaning and seal replacement tools.Flowline lifting tool,
hydraulically or mechanically actuated, used to lift and install a
flexible flowline into the target area.
Key Features:
ROV-based pull-in and connection system for the 2nd end tie-in
of flexible flowlines and umbilicals.Flexible and rigid spools.The
ROVCON skid package is operated by a work-class ROV System.
Technical Description
An advantage of the ROVCON tie-in system is its design, which
enables it to perform a series of tie-ins and connections of
pre-laid lines without returning to the surface. The system is
compact, requires minimal mobilisation and is air transportable.
FMCs ROVCON tie-in systems have been used to connect hundreds of
flowlines and umbilicals for major oil companies worldwide.
ROV carried Tie-in System
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FMC ROVCON ready for another tie-in
Specifications
Specifications ROVCON Mk1Tie-in Tool Overall Dimensions Length:
2,800 mm (110.25) Width: 1,700 mm (67) Height: 850 mm (33.50)Tie-in
Tool Weight In air: 2,560 kg (5,632 lb) In water with Buoyancy:
NeutralFlying Interface Weight In air: 360 kg (792 lb) In water:
NeutralHydraulic supply from ROV Pressure: 210 bar (3,000 psi)
Flow: 36 l/min (9.5 US gal/min)Pull-in Force: 210 kN (47,210 lbf) 2
x 105 kNStroking Force: 200 kN (148,375 lbf)Theoretical Alignment
Force in each Axis Vertical: 120 kN (29,250 lbf) Horizontal: 280 kN
(63,000 lbf)Maximum Water Depth: 2,500 m (8,250 ft)
Specifications ROVCON Mk2Tie-in Tool Overall Dimensions Length:
3,200 mm (126) Width: 1,850 mm (73) Height: 1,750 mm (69)Tie-in
Tool Weight In air: 3,0000 kg (6,600 Ib) In water with Buoyancy:
30-50 kg (66-110 Ib)Flying Interface Weight In air: 600 kg (1,320
Ib) In water w/bouyancy: 50 kg (110 Ib)Hydraulic supply from ROV
Pressure: 207 bar (3,000 psi) Flow: 40 l/min (11 USGM)Pull-in
Force: 210 kN (47,210 lbf) 2 x 105 kNStroking Force: 660 kN
(148,375 lbf)Theoretical Alignment Force in each Axis Vertical: 732
kN (164,560 lbf/ft) Horizontal: 512 kN (115,100 lbf/ft)Maximum
Water Depth: 3000 m (10,000 ft)
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DeploymentThe ROVCON Mk1 skid is attached underneath the work
ROV prior to subsea deployment, while the ROVCON Mk2 is deployed
separately and connected to the ROV subsea.
Operational procedure for pull-in using ROVCON
The ROV attaches the pull-in wires to the inboard hub, using an
anti-reaction flying interface, and removes the in board hub
protection.
Inboard hub face is cleaned and seal is inserted with special
ROV tool.
ROV flies back while the ropes are payed out, and the ROV lands
and locks onto the termination head on the flowline/ umbilical.
Winches in the ROVCON skid pull in the termination head at the
end of the sealine until it is aligned with the inboard hub.
The collet connector is then stroked against the inboard hub and
finally closed.
An external pressure test is performed to verify the integrity
of the seal.
ROV with ROVCON skid is unlocked from termination head; may
continue with another tie-in or retrieved to surface.
Installation Sequence
www.fmctechnologies.com/subsea
FMC TechnologiesP.O. Box 1012NO-3601 KongsbergNorwayPhone: +47
3228 6700
FMC Technologies1777 Gears RoadHouston TX 77067USAPhone: +1 281
591 4000
FMC Technologies A
ugust 2006 - 3D illustrations by ID
- print by Prinfo Vanberg
