PROBLEM TO BE SOLVED: To increase the quantity of water pumped and poured by ensuring the strength of a steel pipe and improving a numerical aperture by forming an external steel pipe and an inner pipe in double constitution. ;SOLUTION: The drawing type strainer for the well consists of the double constitution of an external steel pipe 1 capable of being directly driven to a water collecting section 2 in a ground and an inner pipe 4 integrally having an arrowhead 6 at a front end as a water pumping-pouring section housed at a front end section in the external steel pipe 1, and the external steel pipe 1 is moved after the completion of driving. The quantity of water pumped and poured and a numerical aperture can be adjusted by forming an opening section, in which the inner pipe 4 is composed of a spring.;COPYRIGHT: (C)1999,JPO
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