Abstract: To meet the requirmehts ln developing the key scientlfic technology during the "Seventh-Five-Year-Plan",and improve the researching medium in drilling technology, a full-size scientific experimental well had been completed in 1988 in Zhongyuan oil field. A ?244.5mm casing in the main wellbore was run down to the depth of 1006.45m,two ?60.3mm side tubes were connected with the main wellbore at 516.81m and 924.70m respectively. A ?339.7 mm casing was run down to 143.97m in the slab hole. The NO. 1 gas storage well could hold 0.24m3 compressed gas with 50-70MPa,while the NO.2 well could hold 6m3 with 20MPa. Both of the storage well were connected to the main wellbore with the sidetubes, thus the compressed gas could be considered as formation fluid. Therefore overflow,well kick and blowout could be simulated artificially. The experimental well has been equiped with a full set of power supply, hoisting equipment, as well as the well control equipement, circulation system,gas seal pressure testing units,and data collecting and processing laboratory. The article recommended some researching which have been carried out in the experimental well,and some other functions need to be developed.