US4223724A — Device for cleaning, widening and repairing wells…

Claim 1

Independent Claim 263 words

A device for cleaning, widening and repairing of wells having a well-jacket, with holes therein, extending into the earth and being surrounded by a well-filter, the well-jacket ending at the upper portion thereof with a flange, such device comprising: an air supply pipe for injecting compressed-air into the well, said air supply pipe capable of being extended by means of screwed sections and passing within the well-jacket along the axis of the device; a first valve connected to the upper end of said air supply pipe; a water and air discharge pipe, coaxially surrounding said air supply pipe within the well-jacket, for a length greater than that of said air supply pipe, said water and air discharge pipe being terminated at the upper end thereof with a bell which is airtightly connected to the periphery of said air supply pipe; a second valve, connected to the upper end of said water and air discharge pipe by means of a first port therein; a water discharge pipe connected to said second valve; a third valve, connected to the upper end of said water and air discharge pipe by means of a second port therein; an air discharge pipe connected to said third valve; a head, airtightly connected at the upper end thereof to the outer periphery of the upper portion of said water and air discharge pipe below the first and second ports thereof, and terminating in a flange detachably secured to the upper flange of the well-jacket, said head having a port therein; and a pipe connected to the port of said head.

Claim 2

Independent Claim 263 words

A device for cleaning, widening and repairing of wells having a well-jacket, with holes therein, extending into the earth and being surrounded by a well-filter, the well-jacket ending at the upper portion thereof with a flange, such device comprising: an air supply pipe for injecting compressed-air into the well, said air supply pipe capable of being extended by means of screwed sections and passing within the well-jacket along the axis of the device; a first valve connected to the upper end of said air supply pipe; a water and air discharge pipe, coaxially surrounding said air supply pipe within the well-jacket, for a length greater than that of said air supply pipe, said water and air discharge pipe being terminated at the upper end thereof with a bell which is airtightly connected to the periphery of said air supply pipe; a second valve, connected to the upper end of said water and air discharge pipe by means of a first port therein; a water discharge pipe connected to said second valve; a third valve, connected to the upper end of said water and air discharge pipe by means of a second port therein; an air discharge pipe connected to said third valve; a head, airtightly connected at the upper end thereof to the outer periphery of the upper portion of said water and air discharge pipe below the first and second ports thereof, and terminating in a flange detachably secured to the upper flange of the well-jacket, said head having a port therein; and a pipe connected to the port of said head.

Claim 3

Dependent Claim 38 words

A device in accordance with claim 1, wherein said air supply pipe is closed at the bottom end thereof and has a plurality of slits, slanted upwardly, provided in the wall thereof at the lower end portion thereof.

Claim 4

Dependent Claim 107 words

A device in accordance with claim 1, wherein said water and air discharge pipe is provided with an appropriate number of holes, the diameter thereof decreasing from lower to upper orders, said holes being distributed in several staggered orders within a vertical area which is greater than the area where slits are distributed in the lower part of said air supply pipe; the device further including two annular rubber diaphragms sealing the hollow space between said water and air discharge pipe and the well-jacket in an area where the holes in said water and air discharge pipe are distributed and the holes in the well-jacket are provided.

Claim 5

Dependent Claim 173 words

A device according to claim 1, further including gravity operated valve means, connected to the bottom of said water and air discharge pipe, for letting the well bottom sediments pass into the water and air discharge pipe when the valve is open, said valve means comprising: a ring connected to the bottom of said water and air discharge pipe; a disk having a peripheral truncated-cone surface which couples with the inner surface of said ring; a plurality of radially shaped arms inwardly extending at the lower portion of said ring; a central hub supported by said arms; a stem, coupled to said central hub with a vertical sliding fit, downwardly extending from said disk; and a counterweight disk connected to the lower portion of said stem and having an appropriate number of holes radially distributed therein that have the function of letting the bottom sediments of the well pass through said counterweight disk and go into the water and air discharge pipe when said counterweight disk is pushed upwardly by contacting the sediments.

Claim 6

Dependent Claim 99 words

A device according to claim 1, wherein said air supply pipe, a the lower portion thereof, has a widening which is closed at the bottom end thereof and has a plurality of slits, slanted upwardly, provided in the wall thereof; wherein the water and air discharge pipe has at the lower end thereof a widening coaxially surrounding the widened portion of said air supply pipe; and wherein the device further includes a sheet-steel element, helically shaped, which is secured below the closed bottom wall of said air supply pipe, within the widening of said water and air discharge pipe.

Claim 7

Dependent Claim 51 words

A device according to claim 5, wherein said sheet-steel element is fixed at its side edge to the inner wall of said water and air discharge pipe, downwardly extending beyond the bottom of said air supply pipe, and a stem is provided in the sheet-steel element at the upper end thereof.

Claim 8

Independent Claim 119 words

A device for discharge from wells of earth blocks clogging the well-filter and also the pebble gravel well-filter, comprising: a first pipe section capable of being extended downwardly by means of other sections screwed to it; a second pipe coaxially surrounded by said first pipe section and terminating at the bottom with a tapered conical end, said second pipe having a plurality of slits slanted upwardly at the lower end thereof; a pipe fitting connected to the top of said first pipe section and coupled to said second pipe with a vertical sliding fit; a discharge pipe, connected to extend radially from said pipe fitting; and an air supply pipe coupled to said second pipe to inject compressed-air thereinto.

Claim 9

Independent Claim 119 words

A device for discharge from wells of earth blocks clogging the well-filter and also the pebble gravel well-filter, comprising: a first pipe section capable of being extended downwardly by means of other sections screwed to it; a second pipe coaxially surrounded by said first pipe section and terminating at the bottom with a tapered conical end, said second pipe having a plurality of slits slanted upwardly at the lower end thereof; a pipe fitting connected to the top of said first pipe section and coupled to said second pipe with a vertical sliding fit; a discharge pipe, connected to extend radially from said pipe fitting; and an air supply pipe coupled to said second pipe to inject compressed-air thereinto.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-09-23	1984-03-24	1984-09-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-09-23	1988-03-24	1988-09-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-09-23	1992-03-24	1992-09-23	$7700.00	Window Closed / Lapsed

Device for cleaning, widening and repairing wells of drinking water and irrigation water

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