JPS6016626A - Reactivation of well - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] When a well is used for a long period of time, the amount of water pumped and the amount of water pumped gradually decrease due to the following reasons.

l Clogged strainer 2 Various reactivation attempts have been made to address the decline in capacity and collapse of the aquifer around the well, but reactivation that is simple and has excellent repair effects has not yet been implemented immediately. Not yet.

The present invention relates to the reactivation of wells that can be renovated to have a pumping capacity equal to or higher than that at the time of drilling with a simple construction method,
Seal the well pipe and the upper end opening with a closure panel equipped with a connection part for the pump's water pipe, and operate the pump to drain the water inside the well pipe.4! The feature is that water under the above pressure is injected, then a piston is inserted and the piston is repeatedly moved up and down rapidly to perform pressurized suction.

Most revitalization of conventional wells focuses on cleaning the inside of the well pipe.

Therefore, even if the slap inside the well pipe is removed, the slap on the outside of the well pipe will not be removed, and if this outside slap is causing the strainer to become clogged, an improvement in the water level cannot be expected. No Yes In this invention, the upper end opening of the well pipe is press-fitted into the bomb, so this pressurized water has a place to escape to the strainer, and is injected at high pressure from the strainer to the outside of the well pipe.

This impact blows away the slap attached to the outside of the well pipe and breaks it into powder, which first unclogs the strainer.

Furthermore, the solidified clay layer that has gathered around the outside of the well pipe will also be destroyed.

If this pressure water is less than 20% m, the above effect can hardly be expected, and if it is about 3 or more, it is easy to use a suitable pump. If pressure suction is performed by repeatedly raising and lowering the well, the crushed slag and clay layer generated by the pressure of the pressure water will be sucked up into the well pipe, so they can be removed using the conventional air lift method. The present invention is an excellent well reactivation method that can restore the capacity of wells whose capacity has decreased by an extremely simple method to the level at which the well was drilled or more.

Next, an example of the implementation of the present invention will be described in detail. Measurement will be performed as follows.

2 Pull up the water pump ◇ 3 Seal the upper end opening of the well pipe (1) with the closing panel (5) provided at the connection part (4) of the water pipe (3) of the pump (2).

This proves that the clogging of the strainer (6) has been cleared. In addition, compressed air may also be injected using a compressor shunt.

5 When the baler-type piston (7) is inserted and the Daisei crane is used to repeatedly raise and lower the well under pressure to perform pressurized suction, mud is ejected from inside the well pipe (1) and from the outer circumferential recess. o This is removed by a suitable method, such as a conventional air lift method.

Next, a pump was inserted and a pumping test was performed.

Pump φ 100X21X11 B Judging from these results, it was clearly proven that the well's hydraulics were better than when the well was drilled and that the well had been restored.

In addition, there were several places where the water volume had increased since the time of excavation. This is clearly due to the raw clay used during excavation blocking the water from the aquifer.

According to the negligence data C2, the recovery rate is 95%.

However, wells that are originally in hot aquifer areas (strata with no water), nearby geology (soil reform, etc.), or where the water level has dropped due to an increase in pumping wells are excluded.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view of the well in a state in which pressurized water is injected to eliminate clogging of the strainer, and FIG. 2 is a front cross-sectional view of the well in a pressurized suction state by raising and lowering a piston. (1)...well pipe, (2)--pump, (3)...
Water pipe. (4)...Connecting part, (5)...Closing plate, (7)◆・Piston. July 5, 1980 Applicant Megumi Nakajima Matsu*/Utsuhe 2♂ Procedural amendment August 31, 1988 2, Title of invention: Well reactivation method 3, Relationship with the person making the amendment Patent Applicant Nakajima Megumi Matsu6, Subject of amendment 1. Amended patent application for column 2 of “Detailed Description of the Invention” in the specification, drawings “Figure 1” and [-Figure 2] 1982
- No. 122094 Procedural Amendment The following parts of the specification are amended. Note 1 Between the 12th and 13th lines of page 3 (the following sentence is added: “Finely destroyed The clay layer that had been blocking the aquifer becomes fine and the entire wellbore becomes open. 2. Correct the phrase "compressor (2-yoru)" in the 7th line of page 5 to "compressor (8) (2-yoru"). August 31, 1981 Ke/ge 1-2 seconds

Claims (1)

[Claims] The upper end opening of the well pipe is sealed with a closing panel equipped with a connection part for the water supply pipe of the pump, and the pump is operated to force water under pressure of 20% or more into the well pipe, and then the piston is inserted. Reactivation of a well is characterized by repeated rapid rises and falls to perform pressurized suction.