Casing running water stopping device for water gushing drill hole

Abstract

The utility model discloses a water gushing drill hole casing running water stop device which comprises a casing used for being inserted into an underground drill hole of an overlying stratum, and the underground drill hole extends to a bedrock layer to form an open hole wall; the underground drill hole is a well hole formed in the overlying stratum after the overlying stratum and the bedrock stratum are broken through, a grouting pipe is arranged on the outer side of the casing pipe, the length of the grouting pipe is matched with that of the casing pipe, and the grouting pipe is used for blocking a hole between the outer wall of the casing pipe and the underground drill hole; a protective layer is arranged at the end, extending into the underground drill hole, of the sleeve and used for sealing and water stopping. The problem of water stopping after the confined water of the bedrock layer rushes out is solved.

Description

Technical Field

[0001] The present application relates to a casing water-stopping device for a water-gushing borehole, and belongs to the technical field of water well drilling construction. Background Art

[0002] During the construction of a water well, when drilling through the overburden layer and entering the underground bedrock layer, bedrock pressurized water will suddenly gush out. If the water is not stopped in time, well accidents such as collapse of the overburden layer and falling blocks may occur. In the existing drilling technology, a Chinese patent with publication number CN218349402U proposes a large-diameter drilling bottom casing rapid water-stopping device, which is achieved by setting an iron plate under the bottom plate of the tunnel, opening a through hole in the middle of the iron plate, abutting the casing in the through hole, and setting a water-stopping pad on the side opposite to the top plate of the iron plate to quickly stop water. This method is not suitable for deeper and longer drilling, and it is impossible to seal the gap between the casing and the underground rock wall while placing the casing. Therefore, a new water-stopping device for casing in water-gushing drilling has become a problem that technicians in this field urgently need to solve. Utility Model Content

[0003] According to one aspect of the present application, a method is provided for preventing sudden water gushing when drilling in bedrock layers by arranging multiple layers of rubber rings under the casing and arranging grouting pipes on the sides of the casing.

[0004] The utility model provides a casing water-stopping device for water-gushing drilling, comprising:

[0005] a casing for insertion into an underground borehole in an overlying stratum, the underground borehole extending to a bedrock layer to form an open hole wall;

[0006] The underground borehole is a water well hole formed inside the overlying stratum after the overlying stratum and the bedrock layer are connected. A grouting pipe is arranged outside the casing. The length of the grouting pipe is adapted to the length of the casing. The grouting pipe is used to block the gap between the outer wall of the casing and the underground borehole.

[0007] A protective layer is arranged at one end of the casing extending into the underground borehole, and the protective layer is used for sealing and water stopping.

[0008] Optionally, the protective layer includes an upper fixing plate, a water-stopping rubber ring and a lower fixing plate which are abutted in sequence, and the diameters of the upper fixing plate and the lower fixing plate are adapted to the inner diameter of the underground borehole.

[0009] Optionally, the casing is a multi-section spliced ​​pipe, and the inner diameter of the casing is adapted to the diameter of the underground borehole.

[0010] Optionally, the grouting pipe is a seamless steel pipe, one end of the grouting pipe extends into the upper end of the protective layer, and the other end is connected to the adjacent end of the casing.

[0011] Optionally, the waterproof rubber ring is a multi-layer rubber ring sleeve combination, and the maximum diameter of the waterproof rubber ring is larger than the upper fixing plate and the lower fixing plate.

[0012] The beneficial effects that can be produced by the present application include: the casing provided by the present application can be quickly lowered into the bedrock layer when pressurized water in the bedrock layer suddenly gushes out, and the protective layer arranged at the bottom of the casing has a water-stopping rubber ring, which quickly resists the gap in the underground drill hole, so that the holes through which the pressurized water in the bedrock layer is exposed are quickly water-stopped, and cement is then injected through the grouting pipe arranged on the side of the casing to achieve the effect of blocking the gushing water. The protective layer and the gradual pipeline can quickly block the gushing point and seal the gap with cement, and the speed is fast and the effect is good during the water-stopping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the casing water-stopping device for water-gushing boreholes;

[0014] List of components and reference numerals: 1. overlying stratum; 2. grouting pipe; 3. casing; 4. upper fixing plate; 5. water-stop rubber ring; 6. lower fixing plate; 7. underground borehole; 8. bedrock; 9. open hole wall. DETAILED DESCRIPTION

[0015] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0016] During the drilling process, when the drilling position changes from the overlying stratum 1 to the bedrock layer 8, a well kick phenomenon may occur. At this time, the drill needs to be lifted quickly and water stopping operations need to be performed.

[0017] The utility model provides a casing water-stopping device for water-gushing drilling, comprising:

[0018] The casing 3 is used to be inserted into the underground borehole 7 of the overlying stratum 1. The underground borehole 7 extends to the bedrock layer 8 to form an open hole wall 9. The open hole wall 9 is a water gushing hole and does not need to be provided with a water-stopping device. The water-stopping device is provided in the hole of the underground borehole 7 to form a water stop for the open hole wall 9 while ensuring the protection of the hole wall of the underground borehole 7;

[0019] The casing 3 is a multi-section spliced ​​pipe, and the inner diameter of the casing 3 is adapted to the diameter of the underground borehole 7 .

[0020] It should be noted that after the drill is lifted, the casing 3 is quickly lowered from the overlying stratum 1 to the bedrock layer 8, and the casing 3 is inserted into the surface of the bedrock layer 8 to start stopping the well kick phenomenon.

[0021] The underground borehole 7 is a water well hole formed inside the overlying stratum 1 after the overlying stratum 1 and the bedrock layer 8 are connected. A grouting pipe 2 is arranged outside the casing 3. The length of the grouting pipe 2 is adapted to the length of the casing 3. The grouting pipe 2 is used to block the pores between the outer wall of the casing 3 and the underground borehole 7.

[0022] A protective layer is provided at one end of the casing 3 extending into the underground borehole, and the protective layer is used for sealing and water stopping.

[0023] It is worth mentioning that the grouting pipe 2 extends to the top of the protective layer, and the grouting pipe 2 injects cement from the top to fill the gap between the casing 3 and the underground borehole 7. When the cement fills the gap between the casing 3 and the underground borehole 7, it can quickly achieve a water-stopping effect.

[0024] The grouting pipe 3 is a seamless steel pipe, one end of which extends into the upper end of the protective layer, and the other end is connected to the adjacent end of the casing 3 .

[0025] The protective layer includes an upper fixing plate 4 , a waterproof rubber ring 5 and a lower fixing plate 6 which are abutted in sequence. The diameters of the upper fixing plate 4 and the lower fixing plate 6 are both adapted to the inner diameter of the underground borehole 7 .

[0026] The waterproof rubber ring 5 is a combination of multiple layers of rubber rings, and the maximum diameter of the waterproof rubber ring 5 is larger than the upper fixing plate 4 and the lower fixing plate 6;

[0027] The waterproof rubber ring 5 formed by the multi-layer rubber ring sleeve can ensure the rapid filling of the connection gap between the overlying stratum 1 and the bedrock layer 8, thereby achieving the effect of rapid waterproofing.

[0028] In this embodiment, the height of the water-stop rubber ring 5 is 500 mm, and the diameter of the grouting pipe 2 is 38 mm;

[0029] The upper fixing plate 4 and the lower fixing plate 6 are circular rings made of ordinary steel plates with a thickness of 20 mm, and the inner diameters of the upper fixing plate 4 and the lower fixing plate 6 are consistent with the outer diameter of the sleeve 3 .

[0030] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A casing water-stopping device for water-gushing drilling, characterized in that: include: A casing (3) is used for being inserted into an underground borehole (7) in an overlying stratum (1), wherein the underground borehole (7) extends to a bedrock layer (8) to form an open hole wall (9); The underground borehole (7) is a water well hole formed inside the overlying stratum (1) after the overlying stratum (1) and the bedrock layer (8) are connected. A grouting pipe (2) is arranged outside the casing (3). The length of the grouting pipe (2) is adapted to the length of the casing (3). The grouting pipe (2) is used to block the gap between the outer wall of the casing (3) and the underground borehole (7); A protective layer is provided at one end of the casing (3) extending into the underground borehole (7), and the protective layer is used for sealing and water stopping.

2. A casing water-stopping device for water-gushing drilling according to claim 1, characterized in that: The protective layer comprises an upper fixing plate (4), a water-stopping rubber ring (5) and a lower fixing plate (6) which are abutted in sequence, and the diameters of the upper fixing plate (4) and the lower fixing plate (6) are both adapted to the inner diameter of the underground borehole (7).

3. A casing water-stopping device for water-gushing drilling according to claim 1, characterized in that: The casing (3) is a multi-section spliced ​​pipe, and the inner diameter of the casing (3) is adapted to the diameter of the underground borehole (7).

4. The casing water-stopping device for water-gushing drilling according to claim 1, characterized in that: The grouting pipe (2) is a seamless steel pipe, one end of which extends into the upper end of the protective layer, and the other end of which is connected to the adjacent end of the casing (3).

5. The casing water-stopping device for water-gushing drilling according to claim 2, characterized in that: The waterproof rubber ring (5) is a combination of multiple layers of rubber rings, and the maximum diameter of the waterproof rubber ring (5) is larger than that of the upper fixing plate (4) and the lower fixing plate (6).

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