That leaves more than 100 personnel without a job, not including marine crew.
Hallin's US owner, Superior Energy, decided to put the company up for sale in February.
Rumours about the official closure kept spreading since then but now Hallin is closing for good and there is no indication of a new buyer.
A Hallin employee told TradeWinds: “According to Superior’s calculation we are not making money even though all our offshore support vessels (OSVs) are out on projects.”
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