CN214714743U

CN214714743U - Underground filtering device for geothermal tail water recharging well

Info

Publication number: CN214714743U
Application number: CN202120428946.3U
Authority: CN
Inventors: 钱宏莉; 宋辞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2021-11-16
Anticipated expiration: 2031-02-27

Abstract

The utility model discloses a geothermal tail water recharging well underground filtering device, which comprises a shaft; a well mouth cover is arranged above the well shaft; a water return pipe is arranged on the well mouth cover; the method is characterized in that: the device also comprises a hanging short section; the hanging short joint is positioned in a shaft below the well head cover; the hanging nipple comprises a body; the body is of a circular structure; a salvaging claw is arranged above the body, and an auxiliary short section is arranged below the body; a filter bag is arranged below the auxiliary short section; and a sealing ring is sleeved outside the auxiliary short section. Compared with the prior art, the beneficial effects of the utility model are that: the filter is filtered in the shaft on the spot, is suitable for the prior traditional wellhead device and recharging process, can realize recharging under pressure, is convenient to install and salvage, is easy to process and has low cost.

Description

Underground filtering device for geothermal tail water recharging well

Technical Field

The utility model relates to a geothermal water well technical field, concretely relates to geothermal tail water recharging well is filter equipment in pit.

Background

The ground filtering device is mostly adopted for filtering geothermal tail water at present, so that the problems of large investment, water quality after filtering along the way changes, difficulty in guaranteeing the water quality before entering a recharge layer and the like exist; in addition, the recharging well needs to be periodically lifted and discharged because of the blockage of impurities, so that the operation workload is large, and the environmental protection is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a filter equipment that ground heat tail water in pit filtered on the spot, was adapted to present traditional wellhead assembly and recharging technology, can realize pressing area recharge, installation salvage convenience, easily processing and with low costs in the pit shaft before getting into the recharge layer.

In order to achieve the above object, the utility model provides a following technical scheme: a geothermal tail water recharging well underground filtering device comprises a shaft; a well mouth cover is arranged above the well shaft; a water return pipe is arranged on the well mouth cover; the method is characterized in that: the device also comprises a hanging short joint and a filter bag; the hanging short joint is positioned in a shaft below the well head cover; the hanging nipple comprises a body; the body is of a circular structure; a salvaging claw is arranged above the body, and an auxiliary short section is arranged below the body; a sealing ring is sleeved outside the auxiliary short section; the filter bag is arranged below the auxiliary short section.

Preferably, the wellbore comprises a pup joint, a surface production casing and a production casing.

As optimization, a casing hanger is arranged between the surface production casing and the production casing; the hanging nipple is seated on the casing hanger; and an outer chamfer is arranged on the auxiliary short section.

As optimization, an annular boss 12 is arranged in the production sleeve 13; the hanging nipple is seated on the annular boss 12; the annular boss 12 is provided with an inner chamfer; the aperture of the filter bag 10 is smaller than that of the production casing 13.

As optimization, an annular boss 12 is arranged in the surface production casing 4; the hanging nipple is seated on the annular boss 12; the annular boss 12 is provided with an inner chamfer.

As optimization, an annular boss 12 is arranged in the short section 3; the hanging nipple is seated on the annular boss 12; the annular boss 12 is provided with an inner chamfer.

Preferably, a weight 11 is arranged below the filter bag 10.

As optimization, a fixed hook 16 is arranged in the shaft; the fixed hook 16 is connected with the fishing claw 7 through a fishing rope 15.

As optimization, the inner wall of the well mouth cover is provided with a fixed hook 16; the fixed hook 16 is connected with the fishing claw 7 through a fishing rope 15.

Preferably, the fishing line 15 is made of a corrosion resistant material.

Compared with the prior art, the beneficial effects of the utility model are as follows: the method can be implemented under the condition of the traditional recharging wellhead device, and the workload of additional substantial transformation is not increased; the wellhead cover body is fixedly and hermetically connected to the upper short section, so that the wellhead cover body has a pressure-bearing condition, can realize recharging under pressure and is convenient to operate; when gas exists in the tail water, the water return pipe can be inserted into the liquid level, and air resistance cannot be generated on the back-filling tail water.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Wherein, well mouth lid 1, wet return 2, nipple joint 3, top layer production sleeve pipe 4, body 5, vice nipple joint 6, salvage claw 7, sealing washer 8, sleeve hanger 9, cross filter bag 10, weight 11, recharge layer 12, production sleeve pipe 13, annular boss 14, salvage rope 15, fixed hook 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1: with reference to FIG. 1

A geothermal tail water recharging well underground filtering device comprises a shaft; a well mouth cover 1 is arranged above the well shaft; a water return pipe 2 is arranged on the well mouth cover 1; the device also comprises a hanging short section; the hanging short joint is positioned in a shaft below the wellhead cover 1; the hanging nipple comprises a body 5; the body 5 is of a circular structure; a salvaging claw 7 is arranged above the body 5, and an auxiliary short section 6 is arranged below the body 5; a filter bag 10 is arranged below the auxiliary short section 6; and a sealing ring 8 is sleeved outside the auxiliary short section 6. A weight 11 is arranged below the filter bag 10.

The wellbore comprises a sub 3, a surface production casing 4 and a production casing 13. A casing hanger 9 is arranged between the surface production casing 4 and the production casing 13; the hanging nipple is seated on a casing hanger 9; and an outer chamfer is arranged on the auxiliary short section 6.

A production sleeve 13 is arranged below the surface production sleeve 4; the aperture of the filter bag 10 is smaller than that of the production casing 13.

A fixed hook 16 is arranged in the shaft; the fixed hook 16 is connected with the fishing claw 7 through a fishing rope 15. The fishing line 15 is made of a corrosion resistant material.

The working principle is as follows:

the input process opens well head lid 1 and will hang the nipple joint through salvage rope 15 and transfer to casing hanger 9 on, then bind the upper end of salvage rope 15 on fixed hook 16, filter bag 10 under the gravity auxiliary action of weight 11, transfer naturally.

And in the pulling-out process, the well mouth cover 1 and the water return pipe 2 are removed, the fishing rope 15 on the fixed hook 16 is unfastened, and the hanging short section, the filter bag 10 and the weight 11 are fished out by lifting the fishing rope 15.

The geothermal tail water recharging and filtering process comprises the following steps: geothermal tail water enters a shaft from the water return pipe 2, enters the filter bag 10 through the auxiliary short section 6, is filtered by the filter bag 10, and is discharged into the recharge layer 12 through the production casing 13. The impurities are filtered inside the filter bag 10.

Example 2: refer to FIG. 2

Example 2 differs from example 1 specifically in that:

an annular boss 12 is arranged in the production casing 13, and the suspension short section is seated on the annular boss 12 of the production casing 13; or an annular boss 12 is arranged in the surface layer production casing 4, and the suspension short section is seated on the annular boss 12 of the surface layer production casing 4; or an annular boss 12 is arranged in the short section 3, and the suspension short section is seated on the annular boss 12 of the short section 3. The setting can be selected according to specific conditions, and when the annular boss 12 is arranged in the short section 3, the manual work can conveniently touch the short section, so that the fixed hook 16 and the fishing rope 15 can be omitted, and the short section can be directly pulled out manually. Wherein the annular boss 12 is provided with an internal chamfer to ensure a sealing effect.

To the skilled person in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, because the well structure of the recharging well has diversity, the casing can be divided into multi-stage casing and single-stage casing, and can also be replaced by a screen pipe according to the actual well situation, and the return pipe can also be arranged on the short section side, and the well head can also have other accessories.

Claims

1. A geothermal tail water recharging well underground filtering device comprises a shaft; a well mouth cover (1) is arranged above the well shaft; a water return pipe (2) is arranged on the well mouth cover (1); the method is characterized in that: also comprises a hanging short joint and a filter bag (10); the hanging short section is positioned in a shaft below the well head cover (1); the hanging nipple comprises a body (5); the body (5) is of a circular structure; a salvaging claw (7) is arranged above the body (5), and an auxiliary short section (6) is arranged below the body (5); a sealing ring (8) is sleeved outside the auxiliary short section (6); the filter bag (10) is arranged below the auxiliary short section (6).

2. The underground geothermal tail water recharging well filtering device of claim 1, wherein: the shaft comprises a short section (3), a surface layer production casing (4) and a production casing (13) which are sequentially connected from top to bottom.

3. The underground filter device for the geothermal tail water recharging well as defined in claim 2, wherein: a casing hanger (9) is arranged between the surface production casing (4) and the production casing (13); the hanging nipple is seated on a casing hanger (9); and an outer chamfer is arranged on the auxiliary short section (6).

4. The underground filter device for the geothermal tail water recharging well as defined in claim 2, wherein: an annular boss (12) is arranged in the surface production sleeve (4); the hanging short section is seated on the annular boss (12); the annular boss (12) is provided with an inner chamfer.

5. The underground filter device for the geothermal tail water recharging well as defined in claim 2, wherein: an annular boss (12) is arranged in the production sleeve (13); the annular boss (12) is provided with an inner chamfer; the hanging short section is seated on the annular boss (12); the aperture of the filter bag (10) is smaller than that of the production casing (13).

6. The underground filter device for the geothermal tail water recharging well as defined in claim 2, wherein: an annular boss (12) is arranged in the short section (3); the hanging short section is seated on the annular boss (12); the annular boss (12) is provided with an inner chamfer.

7. The underground geothermal tail water recharging well filtering device of claim 1, wherein: and a weight (11) is arranged below the filter bag (10).

8. The underground geothermal tail water recharging well filtering device of claim 1, wherein: a fixed hook (16) is arranged on the inner wall of the shaft or the inner wall of the shaft cover (1); the fixed hook (16) is connected with the salvaging claw (7) through a salvaging rope (15).

9. The underground geothermal tail water recharging well filtering device of claim 8, wherein: the fishing rope (15) is made of corrosion-resistant material.