Displacement of a horizontal pile

A non-transitory computer-readable medium having stored thereon a computer program comprising instructions to execute a method for displacing a horizontally oriented monopile for an off-shore wind turbine parallel to a base floor by use of a pile displacement system comprising:

• a first subsystem, and
• a second subsystem arranged adjacent to the first subsystem along a longitudinal axis of the monopile,
• wherein each of the first and the second subsystems comprises:
• a height adjustable support, and
• a pile support unit arranged on the height adjustable support such that the pile support unit is movable along the monopile's longitudinal axis,
• wherein the method comprises:
• A. arranging the monopile onto the monopile support units of the first and second subsystems,
• B. lowering the height adjustable support of at least the first subsystem towards the base floor until the weight of the monopile is transferred from at least the first subsystem to an external support structure aligned along the monopile's longitudinal axis, adjacent to the first subsystem,
• C. moving the pile support unit of the first subsystem a distance in direction away from the external support structure,
• D. raising the height adjustable support of the first subsystem away from the base floor until the weight of the monopile is transferred from the external support structure to the first subsystem, and
• E. moving the pile support units of the first and the second subsystems a distance in direction towards the external support structure.

A pile displacement system for displacing a monopile for an off-shore wind turbine towards an upper support of an upending tool aligned along a principal direction, transverse of a vessel's deck, wherein the pile displacement system comprises:

• a first subsystem and a second subsystem arranged adjacent to each other along the principal direction,
• wherein each of the first and the second subsystems comprises:
• a height adjustable support, and
• a pile support unit arranged on movably coupled on top of the height adjustable support such that the pile support unit is movable along the principal direction, and
• wherein the pile support unit of the first subsystem is aligned with the pile support unit of the second subsystem and the upper support.