With the increasing consumption of oil and gas resources in the world, and seeking for clean and efficient new energy has become the goal of all countries, and deep water natural gas hydrate is considered as a kind of new energy have great potential. Continuous water and gas will be produced from the decomposition process of hydrate mining, therefore, it is necessary to carry out the work of producing gas with drainage, and screw pumps technology has been very mature in this area.Screw pump system is studied in this paper for complex working condition of hydrate test extraction without the riser. The friction between driving rod and drilling pipes inner wall cannot be avoided while working, which influences the service life of pipes and the feasibility of test production very much. Based on the problems above, the stabilizing technology for the driving rod inside the drilling pipe is the main research of this paper. Design of a new type of driving rods stabilizer is complicated based on the standard specification, and the stabilizer can also work as the coupling joint between driving rods, and it is formed of the rod body, inner friction bearing sleeve, supporting frame and outer friction layer. While working, the rod body can couple two driving rod as the joint between rods with coupling buckles and threads at both ends, and internal friction bearing sleeves surfaces are made of high wear-resistant materials, and supporting frame is used in defining the displacement between driving rod and drilling pipe, which plays the role of stabilizing. Outer friction bearing layer contacts with the inner face of drilling pipe, and the rotation between driving rod and pipe is mainly composed of the rotation in the inner friction bearing sleeve. This paper describes the design of stabilizer in detail, and complicates its reliability analysis, with the finite element method, considering the structure and material safety.