E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/26
E21B 43/00 (2006.01)
Patent
CA 1225926
A B S T R A C T Subject of the invention is method of procedure for construction of drilled well, principally water producing well and well outfit for carry out the procedure. The main point of the procedure in conformity with the invention is that a casing string having essentially uniform diameter throughout is installed into the drilled hole intersecting one or more fluid-bearing strata, every single fluid-bearing stratum is sealed from each other by elastic open-hole packer, which can be pressurized and is fitted to the cylinder jacket of casing string, while caverns are developed around screen sections of casing string installed into the fluid-bearing strata, which are filled up with coarse grained sand and/or gravel if necessary. The well outfit in conformity with the invention consists at least of the followings: casing string fitted with one screen-section, of open-hole packer, of cement- ing valve and of sand-intake valve, which can be character- ized as follows: there are rows of holes /20, 47, 50/ running in circles on the cylinder jacket of the uniform diameter casing string /1/, positioned in various distances from each other, and to the proper rows of holes open-hole packer /4/, cementing valve /7/ or sand- intake valve /13/ is fitted, which are actuated by pressure - 2 - transfer device /28, 53/, these units can be moved up and down inside the casing string /1/, the two closing de- vices made of two inner elastic pipes /32/ confine and close a given section of casing string /1/, the screen section /3/ of casing string /1/ consists of screen pipe /63/ having larger openings than the largest sand grain size of the fluid-bearing stratum /2/, of plate tube /64/, having longitudinal protruding slots, and between the two elements wire spiral /65/ is placed, and this screen section /3/ is confined by one protector ring /66/ on the top and one at the lower end. /Figure 2/
472130
Palffy Endre
Sim & Mcburney
LandOfFree
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