Gilavar
Comprehensive repair, hull treatment, systems overhaul and seismic equipment support works for the research vessel Gilavar.
Project Info
Vessel information
- Vessel Name
- Gilavar
- Vessel Type
- Research / Survey Vessel
- IMO
- 8008539
- Client
- Caspian Geo LLC
- Duration
- 08.06.2019 - 10.09.2019
- Service
- Repairs and Conversions
Technical parameters
Principal Dimensions
Principal Dimensions
- Length
- 84.97m
- Breadth
- 15.63m
- DWT
- 1400t
Overview
Project execution
The Gilavar project covered a broad repair and survey-vessel support scope, including tank cleaning, underwater hull treatment, hull markings, anchors and chains, Kort nozzle and rudder works, sea chest and thruster grid treatment, valve overhaul, steel renewal, helideck and mast repairs, VSAT modifications, FRC boat repairs, pipeline replacement and seismic system support works.
Scope of Work
Repair scope
- Cleaning and pumping diesel oil from tank
- Cleaning and pumping from grey water tank
- Installation of grey water discharge pipe to grey water tank
- Hull shell plate high-pressure washing, scraping, blasting and painting
- Protection preparation for propeller, anodes, chutes, thrusters, transducers, scupper plugs, fenders and portholes
- Hull markings, vessel name, registry port, draft marks, freeboard marks, bulbous bow marks and thruster marks painting
- Port and starboard anchors and chains ranged out in dry dock, cleaned, inspected, calibrated and marked
- Kort nozzle pressure test at 5 bar, high-pressure washing, scraping, grit blasting to SA 1.5 and painting
- Removal of cement and bottom plugs
- Rudder and stern roller high-pressure washing, scraping, grit blasting to SA 1.5 and painting
- Rudder removal for inspection, rudder stock lip seal renewal and rudder stock overhaul
- Rope guard high-pressure washing, scraping, grit blasting to SA 1.5 and painting
- Removal and renewal of zinc anodes
- Sea chest hand scraping, high-pressure water jet cleaning and grit blasting to SA 1
- Sea chest grating removal, high-pressure cleaning, blasting, painting and refitting with new stainless steel seizing wire
- Thruster grid removal, cleaning, sandblasting to SA 1.0 and painting
- Dismantling of seawater strainers
- Sea valves dismantling, overhaul, cleaning and lapping for DNV GL Class inspection
- Replacement of corroded top plate of BW tank
- Helideck railing blasting, painting and reinstallation
- Tank hydro and air pressure tests
- Steel plate replacement as per UTM report on shelter deck, WBT No. 5, PS shell plating and helicopter deck
- Main mast repair
- Helideck and bridge drain line repair
- UT inspection and repair of cracked weld seam on shell plates
- Bracket modification for new VSAT antenna
- Chemical cleaning and water flushing of horizontal and vertical fenders
- V-SAT mast repair and fabrication and installation of new pole for pull-out mast
- Fabrication and installation of new benches for gyrocompasses
- Repair of corroded vessel porthole frames
- Removal, fabrication and installation of corroded or defective vent heads
- Repair of damaged FRC boat shell plates
- Repair and replacement of defective BWT No. 5 discharge line
- Scraping, high-pressure washing, blasting and painting of azimuth thruster and azimuth thruster sea chest box
- High-pressure washing, blasting and painting under helideck PS and STBD consoles
- Fabrication and machining of eight sets of bronze inserts for streamer winch clamps
- Strainer repair
- Replacement of pipelines to fresh water tank
- Replacement of fire pipeline on superstructure deck
- Repair of pole on monkey island
- Correction of Plimsoll marks on PS and STBD shell plates afloat
- Seismic parts unloading, loading, storage and transportation
- Pressure test of seismic high-pressure air system
- Chemical cleaning and flushing of high-pressure air system and bottles
- Barovane system fabrication and installation as per provided drawing
- Hot oil flushing to NAS 6 and testing of new Barovane tubing and pipeline at 375 bar
- Installation of lubrication pump and piping
- Hot oil flushing to NAS 6 and testing of lubricating oil pump tubing at 600 bar
- Removal of ODIM Monowing hydraulic system on port and starboard gun deck
Timeline
Milestone control
Each stage is organized around production readiness, quality records, and yard coordination.
Stage 01
Hull and docking works
The vessel was prepared for repair with tank cleaning, hull washing, blasting, painting, markings, anchor chain works and underwater appendage treatment.
Stage 02
Mechanical and steel repair
Rudder, Kort nozzle, sea chest, thruster grid, valves, strainers, steel plates, mast, helideck and drain line works were completed.
Stage 03
Survey and seismic systems
VSAT, gyrocompass, FRC, pipelines, seismic air systems, Barovane tubing and ODIM Monowing hydraulic systems were repaired, tested or modified.
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