Published August 2025, Pg. 20-27

Section: Geology and geophysics

UOT: 629.5

DOI: 10.37474/0365-8554/2025-08-20-27

The analysis of the influence of pipe laying equipment on the main dimension of subsea construction vessel

A.G. Eqorov Dr. in Tech. Sc. - Marine Engineering Bureau, GEO, Ukraine, Odessa

O.M. Abdullayev - ASCO Engineering Ltd., Azerbaijan, Baku

R.E. Rzayev - Green Line Shipping, GEO, Azerbaijan, Baku

G.M. Hajinskiy - ВР Exploration (Caspian Sea) limited, Azerbaijan, Baku

Along with a high degree of need but relatively small demand for the pipe-laying vessel, the research is offered to use pipe-laying equipment on the multipurpose subsea construction vessel to ensure uninterrupted vessel operation. In the absence of pipe-lay or pipe repair projects, the vessel can be used in other scopes by installing relevant mobile technology equipment.
Pipe-laying operations carried out in the Caspian Sea basin are described.
Described pipe-laying vessels working in the Caspian Sea for a long time and the parameters of the technology equipment installed. These parameters are considered as base conditions for choosing pipe-laying equipment for the subsea construction vessel.
A structural model of the interaction of pipe-laying parameters and pipe-laying vessel parameters has been developed, and an objective function has been developed to study the formation of the main dimensions of a vessel and provide underwater technical work using pipe-laying equipment.
For research, the database of parameters of a pipe-laying vessel of the world fleet was created. Using the database, dependent parameters for pipe laying and vessels were created. According to dependences, it was added that the nomogram of the definition of the main dimension of subsea construction vessel developed earlier with pipe-laying equipment.
Based on the developed nomogram and dependencies obtained from the database, the necessary main dimensions of the vessel were obtained for individual parameters of the pipe-laying process.
An optimization model for the subsea construction vessel's main dimensions was developed to obtain the optimal main dimensions required for the reliable and safe operation of the pipe-laying equipment.

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