Thermal　stimulation　is　a　common　measure　used　to　improve　the　decomposition　efficiency　of　natural　gas　hydrate.　However,　the　conventional　thermal　stimulation　methods　require　considerable　investments　in　wellbore　construction.　According　to　the　penetration　mechanism　of　the　torpedo　anchor,　the　self-entry　energy　compensation　device　(ECD)　is　innovatively　proposed　to　replace　the　existing　wellbore　platform.　The　principle　and　critical　technologies　of　the　ECD　are　described　and　analyzed　in　detail.　Then,　a　penetration　model　and　an　exploitation　model　are　developed　using　the　reservoir　data　from　the　W17　station　in　the　Shenhu　sea　area,　and　the　main　conclusions　are:　It　takes　about　4　s　for　the　ECD　to　penetrate　from　the　overburden　layer　to　the　reservoir,　and　its　penetration　depth　is　about　50.1–370.4　m,　which　covers　the　buried　depth　of　most　marine　reservoirs.　Nevertheless,　the　combined　depressurization　+　thermal　stimulation　method　is　unsuitable　for　the　Shenhu　reservoir　due　to　the　low　permeability,　low　thermal　conductivity,　and　high　initial　temperature.　Overall,　the　ECD　can　provide　a　new　idea　for　developing　the　NGH　thermal　stimulation　method　to　solve　the　Joule-Thomson　effect　and　seawater　freezing　problems　during　the　depressurization　production.　©　2022　Elsevier　B.V.