CN101413278A - Large caliber deep well water subsidence sand symmetrical double-twisting negative pressure pump drainage operating method - Google Patents

Abstract

The invention discloses a method for performing symmetrical dual-reamer sub-pressure pumping and discharging operations of underwater settled sand in a large-caliber deep well, wherein a bucket grab is arranged on one side of the deep well to excavate gravels with large particle sizes; a hanger for hanging a sub-pressure sorbpump is arranged on the other side of the well mouth; the sub-pressure sorbpump provided with symmetrical snakelike reamers is lifted into the well and put to the settled sand; the symmetrical snakelike reamers are driven to be inserted into the settled sand to rotate in opposite directions, and at the same time the sub-pressure sorbpump is started to discharge the settled sand, and the settled sand is discharged out of the well through a sand discharge pipe. The method makes use of the opposite action principle and the sub-pressure adsorption principle to provide a pair of snakelike reamers on the two sides of a hung sub-pressure sorbpump head symmetrically, so as to counteract the rotation force generated by rotating reamers through oppositely twisting sand layers by the snakelike reamers and ensure that the sub-pressure sorbpump hung on a derrick can work smoothly and normally; besides, the gravels with larger particle sizes appearing in a gravel layer are excavated through the bucket grab arranged at one side of the well mouth so as to achieve the aim of cleaning the underwater settled sand in the large-caliber deep well under a geological condition with sand gravels.

Description

Sand setting symmetric double strand negative pressure pump drainage operating method under the heavy caliber phreatic water

Technical field

The invention belongs to that the sandy gravel stratum sand setting digs the field clearly under the well water, particularly a kind ofly adopt symmetrical multiple twin negative pressure to carry out the job practices of pump drainage sand setting.

Technical background

In Infrastructure Field such as water conservancy, river port, municipal administration, traffic, run into the construction of heavy caliber deep-well through regular meeting.Because the limitation of geological conditions, sometimes when the heavy caliber deep-well digs clearly, can run under water that the sandy gravel stratum sand setting is difficult to remove, need take to dig clearly processing under water.Because the poorly water-soluble of sandy gravel stratum sand setting, the restriction of the depth of water in addition, can't adopt conventional slush pump pump drainage sand setting, and the negative-pressure adsorption pump that adopts influences the pump head operate as normal again because of the stressed rotation of the pump housing of hanging extension by the feet, big gravel also takes place sometimes block the situation of adsorbing pump head.

Summary of the invention

Purpose of the present invention is exactly will provide a kind of can extract the method for removing the sandy gravel stratum under water in the heavy caliber deep-well well.

The object of the present invention is achieved like this: sand setting symmetric double strand negative pressure pump drainage operating method under a kind of heavy caliber phreatic water,

Arrange grab bucket in deep-well one side, excavate big particle diameter gravel by grab bucket;

Arrange the suspender that is used to hang the negative-pressure adsorption pump at the well head opposite side;

The negative-pressure adsorption pump that has installed symmetrical snakelike reamer additional is lifted the down-hole, and transfer in the sand setting;

Rotate in opposite directions among driving symmetrical snakelike reamer insertion sand setting, start negative-pressure adsorption pump pump drainage sand setting simultaneously, sand setting is discharged to outside the well by row's sand tube;

Behind the sand setting at the intact operation position of multiple twin negative pressure pump drainage, change the above-mentioned operation that circulates successively of next operation position again, remove until sand setting under water and finish.

Sand setting symmetric double strand negative pressure pump drainage operating method under the heavy caliber phreatic water provided by the present invention, principle and negative-pressure adsorption principle according to effect in opposite directions, install a pair of snakelike reamer additional in the negative-pressure adsorption pump head bilateral symmetry that hangs, by snakelike reamer twist layer of sand in opposite directions, offset reamer with this and rotate the revolving force that produces, assurance is suspended on the steady operate as normal of negative-pressure adsorption stock pump energy on the derrick, the gravel that sand gravel layer is had a greater particle size is then by being arranged in the method that well head grab jaw is first excavated, and realizes that with this sand setting digs clearly under the heavy caliber phreatic water under sand gravel geological conditions.

Description of drawings

Below in conjunction with drawings and Examples invention is described further.

Fig. 1 is a fundamental diagram of the present invention.

The specific embodiment

Operating principle of the present invention is: according to the principle and the negative-pressure adsorption principle of effect in opposite directions, install a pair of snakelike reamer additional in the negative-pressure adsorption pump head bilateral symmetry that hangs, by snakelike reamer twist layer of sand in opposite directions, offset reamer with this and rotate the revolving force that produces, assurance is suspended on the steady operate as normal of negative-pressure adsorption stock pump energy on the derrick, the gravel that sand gravel layer is had a greater particle size is then by being arranged in the method that well head grab bucket is first excavated, and realizes sand setting excavation under the big well head phreatic water under the sand gravel geological conditions with this.

Embodiment:

Arrange grab bucket 2 in deep-well 9 one sides, by the 2 big particle diameter gravels of excavating in the deep-well 9 of grabbing bucket;

Arrange the suspender 5 that is used to hang the negative-pressure adsorption pump at the well head opposite side, suspender 5 adopts mobile crane etc.;

The negative-pressure adsorption pump 3 that has installed symmetrical snakelike reamer 4 additional is lifted the down-hole by suspender 5, and transfer in the sand setting;

Rotate in opposite directions among driving symmetrical snakelike reamer 4 insertion sand settings, start negative-pressure adsorption pump 4 pump drainage sand settings simultaneously, sand setting is discharged to outside the well by row's sand tube 6; Negative-pressure adsorption pump 4 needed negative pressure are provided by air compressor machine 8, communicate with negative-pressure adsorption pump 4 through high-pressure air pipe 7;

Behind the sand setting at the intact operation position of multiple twin negative pressure pump drainage, change the above-mentioned operation that circulates successively of next operation position again, remove until sand setting under water and finish.

Claims (1)

1, sand setting symmetric double strand negative pressure pump drainage operating method under a kind of heavy caliber phreatic water is characterized in that:

Arrange grab bucket in deep-well one side, excavate big particle diameter gravel by grab bucket;

Arrange the suspender that is used to hang the negative-pressure adsorption pump at the well head opposite side;

The negative-pressure adsorption pump that has installed symmetrical snakelike reamer additional is lifted the down-hole, and transfer in the sand setting;

Rotate in opposite directions among driving symmetrical snakelike reamer insertion sand setting, start negative-pressure adsorption pump pump drainage sand setting simultaneously, sand setting is discharged to outside the well by row's sand tube;

Behind the sand setting at the intact operation position of multiple twin negative pressure pump drainage, change the above-mentioned operation that circulates successively of next operation position again, remove until sand setting under water and finish.

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