Precise fixing and hole sealing device for grouting point position

Abstract

The utility model discloses a grouting point accurate fixing and hole sealing device which comprises a pipe joint, the pipe joint is used for being in butt joint with a drill rod and a filling screen pipe, a check valve is installed between the filling screen pipe and the pipe joint, the filling screen pipe is wrapped by an expandable extrusion part, the tail end of the filling screen pipe is sealed, and the pipe joint is used for being in butt joint with the drill rod and the filling screen pipe. A hole is formed in the filling screen pipe, and the expandable extrusion part is extruded and expanded through a liquid medium flowing out of the hole of the filling screen pipe and blocks a target well section. According to the grouting point accurate fixing and hole sealing device, timely grouting and hole sealing of any well section at any time can be achieved, the time of repeated pause due to multiple times of sealing in a traditional hole sealing mode can be effectively saved, one-time hole sealing success of any well section can be achieved, and the project quality and the hole sealing success rate are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to directional drilling technology field, concretely relates to a grouting point position accurate fixed hole sealing device. BACKGROUND

[0002] The application of directional drilling technology plays an important role in the fields of coal mine water prevention and control, gas extraction, special structure exploration and mine water inrush plugging. However, in the process of directional drilling construction, due to the reasons such as the failure to follow the build-up rate and the drilling of special conditions, it is necessary to re-drill from straight holes, inclined holes, upward inclined holes, horizontal holes and other possible hole sections, and since the hole sealing section is the same in diameter, it is difficult to achieve accurate plugging of the target well section. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a grouting point position accurate fixed hole sealing device, which has a simple structure and can seal any well section as needed, with high sealing efficiency and success rate.

[0004] A grouting point position accurate fixed hole sealing device, comprising a pipe joint, the pipe joint is used for connecting a drill pipe and a filling screen pipe, a check valve is installed between the filling screen pipe and the pipe joint, the filling screen pipe is covered with an inflatable extrusion piece, the filling screen pipe is sealed at the end, the filling screen pipe is provided with a hole, and the inflatable extrusion piece is extruded and expanded by the liquid medium flowing out of the hole of the filling screen pipe and realizes the plugging of the target well section.

[0005] As a preferred technical scheme of the above, the inflatable extrusion piece is an elastic filling bag, and the two ends of the elastic filling bag are sealed and fastened to the filling screen pipe.

[0006] As a preferred technical scheme of the above, the outer circumference of the filling screen pipe is further welded with a protective flat iron, and the protective flat iron is arranged at the periphery of the inflatable extrusion piece.

[0007] As a preferred technical scheme of the above, the filling screen pipe is provided with an upper protective plate and a lower protective plate which are arranged in a circular arc shape and oppositely, and the upper protective plate and the lower protective plate are respectively located on the outer side of the two ends of the protective flat iron.

[0008] As a preferred technical scheme of the above, the upper protective plate is welded to the filling screen pipe, and the lower protective plate is fixed to the end of the filling screen pipe through bolts.

[0009] As a preferred technical scheme of the above, the filling screen pipe is provided with two groups of upper and lower fixed grooves, and the two ends of the elastic filling bag are respectively sealed and limited in the fixed grooves.

[0010] As the preferred technical scheme of the above, the fixing groove is enclosed by two positioning plates in front and back, and the two ends of the protection flat iron are welded to the outer positioning plates of each group respectively.

[0011] As the preferred technical scheme of the above, the pipe joint is in the shape of an inverted bowl.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The grouting point precision fixing hole sealing device can realize timely grouting and hole sealing at any time and any well section, can effectively save the time of repeated stoppage required by the traditional hole sealing mode, can realize one-time hole sealing success at any well section, and greatly improves the engineering quality and hole sealing success rate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model discloses a structure schematic view.

[0015] The reference signs are as follows: 1-pipe joint, 2-filling screen pipe, 3-check valve, 4-inflatable extrusion piece, 5-hole, 6-protection flat iron, 7-upper protection plate, 8-lower protection plate, 9-bolt, 10-fixing groove, 11-positioning plate. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below, and obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0017] The utility model will be described further in detail in combination with the drawings below:

[0018] As Figure 1 The utility model discloses a grouting point precision fixing hole sealing device, which comprises a pipe joint 1, the pipe joint 1 is used for butting a drill rod and a filling screen pipe 2, a check valve 3 is installed between the filling screen pipe 2 and the pipe joint 1, the filling screen pipe 2 is covered with an inflatable extrusion piece 4, the filling screen pipe 2 is sealed at the tail end, the filling screen pipe 2 is provided with a hole 5, and the inflatable extrusion piece 4 is extruded and expanded by the liquid medium flowing out of the hole 5 of the filling screen pipe 2 and realizes the plugging of the target well section.

[0019] Specifically, the pipe joint 1 is in the shape of an inverted bowl, and the pipe joint 1 is connected with the drill pipe on the ground, the device is lowered into the hole by the drill pipe, and water is injected into the device through the drill pipe after reaching the desired point. The check valve 3 is used to control the direction of water flow and prevent backflow of liquid to ensure that there is sufficient liquid pressure in the inflatable extrusion member 4.

[0020] In this embodiment, the inflatable extrusion member 4 is an elastic filling bag, and the two ends of the elastic filling bag are sealed and fastened to the filling screen pipe 2. Specifically, the elastic filling bag is made of rubber and has the shape of an olive, which surrounds the outside of the filling screen pipe 2 and is fixed on the filling screen pipe 2 by wire winding or bolt fastening for water filling and pressure filling, and the device is fixed on the target well section by relying on the pressure.

[0021] In this embodiment, the outer circumference of the filling screen pipe 2 is also welded with a protective flat iron 6, which is arranged on the periphery of the inflatable extrusion member 4. Specifically, the protective flat iron 6 is uniformly distributed along the circumference of the filling screen pipe 2, and can be provided in 6-8 strips, which are uniformly dispersed outside the elastic filling bag in the shape of a strip, and are used to protect the elastic filling bag and prevent the elastic filling bag from being damaged due to friction with the hole wall during the process of lowering into the hole. At the same time, the friction resistance between the elastic filling bag and the hole wall after water injection and pressurization is increased, the service life of the device is prolonged, and the pipe joint can be timely removed.

[0022] In this embodiment, the filling screen pipe 2 is provided with an upper protective plate 7 and a lower protective plate 8 which are arranged oppositely in the shape of a circular arc, and the upper protective plate 7 and the lower protective plate 8 are respectively located on the outside of the two ends of the protective flat iron 6.

[0023] In this embodiment, the upper protective plate 7 is welded on the filling screen pipe 2, and the lower protective plate 8 is fixed on the end of the filling screen pipe 2 by bolts 9. Specifically, the upper protective plate 8 is connected to the lower part of the check valve 3 and forms an inner buckle with the lower protective plate 7, and is respectively located on the upper end and the lower end of the fixing groove 10, which is used to protect the main part of the device, so that the device can move flexibly up and down in the hole. The lower protective plate 8 plays a guiding role, which facilitates the lowering of the device into the hole. When the device encounters resistance during the process of lowering into the hole, the upper protective plate 7 can be conveniently lifted for inspection.

[0024] In this embodiment, the filling screen pipe 2 is provided with two groups of upper and lower fixing grooves 10, and the two ends of the elastic filling bag are respectively sealed and limited in the fixing grooves 10.

[0025] In this embodiment, the fixing groove 10 is formed by two positioning plates 11, and the two ends of the protective flat iron 6 are respectively welded on the positioning plates 11 on the outer side of each group. Specifically, the fixing groove 10 is provided to facilitate the fixed installation of the elastic filling bag and the protective flat iron 6.

[0026] The working principle of this embodiment is as follows.

[0027] When used, the pipe joint 1 is connected with the drill rod end on the ground, the drill rod carries the device into the hole, the upper protection plate 7 and the lower protection plate 8 are used to ensure that the device is smoothly lowered into the hole, after reaching the preset grouting point, water is injected into the drill rod, the water enters the filling screen pipe 2 after passing through the check valve 3, the check valve 3 can ensure that the water flows into the filling screen pipe 2 in one direction, and enters the elastic filling bag through the hole 5 on the pipe wall, the water injection is continued until the elastic filling bag reaches the full state, and the outer protection flat iron 6 is fully extruded, so that the outer protection flat iron 6 is tightly attached to the hole wall, and the device is fixed at the current position. The drill rod is screwed to disconnect the end thereof from the pipe joint 1, and the cement slurry is injected from the orifice, and is allowed to condense, so that the self-controlled grouting point is realized, and the accurate grouting hole sealing is realized.

[0028] The above is only preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A grouting point position precise fixing hole sealing device, characterized in that: The utility model provides a pipe joint for butting drill pipe and filling screen pipe, a check valve is installed between the pipe joint and the filling screen pipe, the filling screen pipe is covered with an inflatable extrusion piece, the filling screen pipe is sealed at the end, the filling screen pipe is provided with a hole, the inflatable extrusion piece is extruded and expanded by liquid medium flowing out of the hole of the filling screen pipe and realizes the plugging of the target well section.

2. The grouting point position precise fixing and hole sealing device according to claim 1, characterized in that: The inflatable extrusion piece adopts an elastic filling bag, and the two ends of the elastic filling bag are sealed and fastened to the filling screen pipe.

3. The grouting point position precise fixing and hole sealing device according to claim 2, characterized in that: The outer periphery of the filling screen pipe is further welded with a protective flat iron, and the protective flat iron is arranged at the periphery of the inflatable extrusion piece.

4. The grouting point position precise fixing and hole sealing device according to claim 3, characterized in that: The filling screen pipe is provided with oppositely arranged upper and lower protective plates in the shape of a circular arc, and the upper and lower protective plates are respectively located outside the two ends of the protective flat iron.

5. The grouting point position precise fixing and hole sealing device according to claim 4, characterized in that: The upper protective plate is welded to the filling screen pipe, and the lower protective plate is fixed to the end of the filling screen pipe by bolts.

6. The grouting point position precise fixing and hole sealing device according to claim 3, characterized in that: The filling screen pipe is provided with two groups of upper and lower fixing grooves, and the two ends of the elastic filling bag are respectively sealed and limited in the fixing grooves.

7. The grouting point position precise fixing and hole sealing device according to claim 6, characterized in that: The fixing grooves are formed by enclosing two positioning plates, and the two ends of the protective flat iron are respectively welded to the positioning plates outside each group.

8. The grouting point position precise fixing and hole sealing device according to claim 1, characterized in that: The pipe joint is in the shape of an inverted bowl.

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