## 2 Related Works  
At present, the international community only involves thermal insulation and coring in in situ low-temperature environments, such as combustible ice coring, while high-temperature thermal insulation and coring in deep hard rock is a blank in research. The core samplers with thermal insulation function include the pressure temperature core sampler (PTCS) designed by Japan Petroleum Corporation [15]. Multiple autoclave core (MAC) and dynamic autoclave piston corer (DAPC) used in R.V.SONNE cruises developed by the German OMEGA project [16]. The pressure and temperature preservation system (PTPS) developed by China First Ocean Research Institute [17]. The hole bottom freezing core sampler (FCS) developed by Jilin University [18]. The insulation and pressure-maintaining sampler developed by Beijing Institute of Prospecting Engineering [19]. The gravity piston fidelity sampler of Zhejiang University [20] Changsha Mine Research Institute developed a deep-sea hard rock fidelity core remover [21]. The GW194-70 BB thermal insulation pressure-maintaining coring tool and the coal-bed methane thermal insulation, pressure-maintaining and shape-preserving coring tool developed by the PetroChina Great Wall Drilling Engineering Technology Research Institute [22; 23]. The heat preservation method of each core remover is shown in Table 1.  
Except for the main types of core removers mentioned above, other core removers do not have the function of heat preservation. At present, most thermal insulation cores only use passive thermal insulation, and few use active thermal insulation. The most representative one is the pressure temperature core sampler developed by Japan, which has both active and passive heat preservation. Its structural principle is shown in Figure 3. The core remover mainly uses heat insulation materials and liquid nitrogen between the core lining pipe and the inner pipe to realize passive heat preservation. At the same time, a battery is used to drive the Peltier refrigeration sheet and cooperate with the low-temperature drilling fluid to remove the heat from the hot end, maintain high-efficiency thermoelectric conversion in the well, and realize active heat preservation. However, due to its complex structure, difficult processing, and high cost, its active insulation technology has only been tested indoors and has not been applied in engineering [15].  
Since the in situ temperature of combustible ice is not much different from the ambient temperature, the use of passive heat preservation and pressure-maintaining coring technology can achieve combustible ice acquisition [24]. However, for deep hard rock, the in situ temperature is as high as hundreds of degrees Celsius, which is very different from the ground environment temperature. The heat loss during the coring process is serious, so it is necessary to take active heat preservation for real-time heat compensation to maintain the in situ temperature of the core.  
Referring to the design principles of smart drill pipes, and the use innovative design methods we designed and optimized the conductive structure of the center pole of the core remover to realize a self-adaptive non-winding connection and power conduction of the conductive center pole. Finally, a physical prototype was made for relevant experimental verification to meet the signal and power requirements for in situ insulation and coring operations of deep rocks.