Natural　gas　hydrate　(NGH)　dissociation　is　a　heat-absorbing　process,　and　the　cooling　around　the　wellhead　is　more　pronounced　during　depressurization　production.　Low　temperature　will　cause　NGH　regeneration　or　ice　formation,　blocking　gas　flow　paths　and　reducing　extraction　efficiency.　In　this　study,　a　novel　heat　transfer　device　(HTD)　was　innovatively　proposed　to　alleviate　this　problem.　Theoretical　analysis　and　numerical　simulations　were　used　to　research　the　methodological　principles,　applicable　conditions,　and　expected　benefits　of　the　HTD.　Results　show　that　the　HTD　utilizes　the　characteristics　of　the　geothermal　gradient　to　rapidly　transfer　energy　from　the　lower　reservoir　to　the　wellbore　wall,　which　in　turn　raises　the　temperature　and　prevents　the　ice　and　NGH　regeneration　causing　the　blockage　from　adhering　to　the　wellbore　wall.　The　heat　transfer　radius,　the　length　of　the　endothermic　section,　and　the　operating　temperature　difference　make　a　tremendous　difference　in　the　heat　transfer　efficiency　of　the　HTD.　The　HTD　may　be　more　suitable　for　Class　1　reservoir　conditions　and　help　to　improve　gas　production　under　the　depressurization　method　in　the　Shenhu　sea　of　the　South　China　Sea.　The　device　can　achieve　continuous　self-heat　transfer　without　external　energy　injection　to　significantly　reduce　costs,　which　provides　a　new　idea　for　marine　NGH　production.　©　2022　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.