Drilling high-pressure pressurized-water grouting orifice protection device for drilling

Abstract

The utility model discloses a drilling high-pressure pressurized-water grouting orifice protection device for drilling, and belongs to the technical field of hydrogeological drilling. Comprising a protective wall opening sleeve; the second-opening working casing pipe is mounted on the inner side of the first-opening wall protection casing pipe; the wellhead connecting assembly is communicated with the second-opening working sleeve and is provided with a pressure gauge; the wellhead protection assembly covers the outer side of the wellhead connecting assembly; and the well mouth protection assembly is fixedly connected with the well mouth connection assembly through the protection connection assembly. According to the device, protection is carried out when a person watches the pressure of a hole opening in the drilling high-pressure water-pressing grouting process, the device is easy to manufacture and operate and can be repeatedly used, meanwhile, a waste sleeve is utilized, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogeological drilling, in particular to a drilling hole high-pressure water grouting hole protection device for drilling. Background Art

[0002] At present, various mining groups have successively carried out ground advance area exploration and treatment of high-pressure karst water hazards in coal seam floors. The final grouting pressure is generally 1.5 times the hydrostatic pressure of the target layer, and some pressures can reach 15MPa. The orifice pressure is very high. There is a certain risk for personnel to observe the pressure gauge pressure at the orifice or work nearby. The wellhead needs to have a protective component to reduce the impact when danger occurs and achieve a protective effect. Utility Model Content

[0003] The utility model aims to provide an efficient drilling hole high pressure water grouting hole protection device.

[0004] In order to solve the above technical problems, the utility model provides a drilling hole high pressure water grouting hole protection device, comprising:

[0005] One-open wall casing;

[0006] A two-opening working casing is installed inside the one-opening wall protection casing;

[0007] A wellhead connection assembly, which is connected to the secondary working casing and is provided with a pressure gauge;

[0008] A wellhead protection assembly, the cover of which is arranged outside the wellhead connection assembly;

[0009] A protection connection assembly, wherein the wellhead protection assembly is fixedly connected to the wellhead connection assembly via the protection connection assembly.

[0010] Preferably, the protective connection assembly comprises a first connection ring, a second connection ring and a nut;

[0011] The first connecting ring is fixedly mounted on the bottom of the side wall of the wellhead protection assembly;

[0012] The second connecting ring is fixedly mounted on the bottom of the side wall of the wellhead connecting assembly;

[0013] The first connecting ring and the second connecting ring are both provided with screw holes, and the nuts pass through the screw holes of the first connecting ring and the second connecting ring for connection and fixation.

[0014] Preferably, the wellhead connection assembly comprises an upper connection member and a lower connection member that are fixedly connected;

[0015] The diameter of the upper connecting piece is smaller than the diameter of the lower connecting piece.

[0016] Preferably, the inner side of the double-opening working sleeve is provided with an internal thread;

[0017] The bottom of the side wall of the lower connecting piece is provided with an external thread;

[0018] The two-open working sleeve is threadedly connected to the lower connecting piece.

[0019] Preferably, the side wall of the wellhead protection assembly is provided with an observation window corresponding to the pressure gauge.

[0020] Preferably, it also includes a grouting pipeline;

[0021] The head end of the grouting pipeline is communicated with the upper connecting piece.

[0022] Preferably, a grouting opening is provided on the side wall of the wellhead protection assembly;

[0023] The tail end of the grouting pipeline extends out from the grouting opening.

[0024] Preferably, the first connecting ring and the second connecting ring are annular iron sheets.

[0025] Preferably, the wellhead protection component is an abandoned casing.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] The utility model provides protection for personnel when they are watching the hole pressure during the process of high-pressure water grouting in drilling. The device is simple to manufacture and easy to operate, can be used repeatedly, and can utilize discarded casings to save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0029] Figure 1 The present invention is a structural schematic diagram of a borehole high-pressure water grouting hole protection device for drilling.

[0030] In the figure: 1-wellhead protection assembly; 2-observation window; 3-pressure gauge; 4-grouting pipeline; 5-wellhead connection assembly; 51-upper connection piece; 52-lower connection piece; 6-first connection ring; 7-protection connection assembly; 71-nut; 8-second connection ring; 9-two-opening working casing; 10-one-opening wall casing. DETAILED DESCRIPTION

[0031] Many specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation disclosed below.

[0032] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0033] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0034] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0035] The utility model provides a drilling hole high pressure water grouting hole protection device for drilling, comprising:

[0036] An open wall protection sleeve 10;

[0037] A two-opening working sleeve 9, which is installed inside the one-opening wall protection sleeve 10;

[0038] A wellhead connection assembly 5, which is connected to the secondary working casing 9 and is provided with a pressure gauge 3;

[0039] A wellhead protection assembly 1, whose cover is arranged outside the wellhead connection assembly 5;

[0040] The protection connection assembly 7 , the wellhead protection assembly 1 is fixedly connected to the wellhead connection assembly 5 via the protection connection assembly 7 .

[0041] Preferably, the protective connection assembly 7 comprises a first connection ring 6, a second connection ring 8 and a nut 71;

[0042] The first connecting ring 6 is fixedly mounted on the bottom of the side wall of the wellhead protection assembly 1;

[0043] The second connecting ring 8 is fixedly mounted on the bottom of the side wall of the wellhead connecting assembly 5;

[0044] The first connecting ring 6 and the second connecting ring 8 are both provided with screw holes, and the nuts 71 pass through the screw holes of the first connecting ring 6 and the second connecting ring 8 to connect and fix them.

[0045] Preferably, the wellhead connection assembly 5 comprises an upper connection member 51 and a lower connection member 52 which are fixedly connected;

[0046] The diameter of the upper connecting member 51 is smaller than the diameter of the lower connecting member 52 .

[0047] Preferably, the inner side of the double-opening working sleeve 9 is provided with an internal thread;

[0048] The bottom of the side wall of the lower connecting member 52 is provided with an external thread;

[0049] The second open working sleeve 9 is threadedly connected to the lower connecting piece 52 .

[0050] Preferably, an observation window 2 corresponding to the pressure gauge 3 is opened on the side wall of the wellhead protection assembly 1 .

[0051] Preferably, it also includes a grouting pipeline 4;

[0052] The head end of the grouting pipeline 4 is connected to the upper connecting piece 51 .

[0053] Preferably, a grouting opening 11 is provided on the side wall of the wellhead protection assembly 1;

[0054] The tail end of the grouting pipeline 4 extends out from the grouting opening 11 .

[0055] Preferably, the first connecting ring 6 and the second connecting ring 8 are annular iron sheets.

[0056] Preferably, the wellhead protection assembly 1 is an abandoned casing.

[0057] In order to better illustrate the technical effect of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process:

[0058] Embodiment 1, a drilling hole high-pressure water grouting hole protection device, comprising a wellhead protection component 1 (the remaining casing cut when the first casing is opened), an observation window 2 opened on the wellhead protection component 1, a pressure gauge 3, a wellhead connection component 5, a wellhead connection component 5, a circular iron sheet welded to the wellhead protection component 1 (a first connecting ring 6), a nut 71, and a circular iron sheet welded to the wellhead connection component 5 (a second connecting ring 8). The wellhead connection component 5 is respectively connected to the pressure gauge 3, the grouting pipeline 4 and the second working casing 9.

[0059] Installation method:

[0060] 1. The first connecting ring 6 is welded to the wellhead protection assembly 1;

[0061] 2. The second connecting ring 8 is welded to the wellhead connecting assembly 5;

[0062] 3. The wellhead protection assembly 1 is provided with a window at the corresponding position of the top pressure gauge 3 to form an observation window 2;

[0063] 4. A circular grouting opening 11 is punched on the left side of the wellhead protection assembly 1 to facilitate the connection of the grouting pipeline 4;

[0064] 5. The first connecting ring 6 and the second connecting ring 8 are connected by a nut 71 .

[0065] Usage method: The first connecting ring 6 and the second connecting ring 8 can be repeatedly used after being welded with the wellhead protection component 1 and the wellhead connection component 5. Before starting grouting, the wellhead connection component 5 is connected to the second opening working casing 9 through threads; the left side of the wellhead connection component 5 is connected to the grouting pipeline 4 through threads, and the top of the wellhead connection component 5 is connected to the pressure gauge 3 through threads; the wellhead protection component 1 is covered on the outside of the wellhead connection component 5, and the first connecting ring 6 at the bottom of the wellhead connection component 5 is connected to the second connecting ring 8 of the wellhead connection component 5 through a nut 71; personnel can observe the orifice pressure through the window of the protection component.

[0066] The utility model can protect people working nearby when the orifice pressure is too high and danger occurs.

[0067] For example, in a regional exploration and management project in Huainan, it is required to observe the changes in the orifice pressure every 5 minutes and record the orifice pressure. This device facilitates observation through the window, protects nearby workers, and saves costs by utilizing discarded casing.

[0068] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A drilling hole high pressure water grouting hole protection device, characterized in that: include: An open wall protection sleeve (10); A two-opening working sleeve (9) is installed inside the one-opening wall protection sleeve (10); A wellhead connection assembly (5), which is connected to the secondary working casing (9) and is provided with a pressure gauge (3); A wellhead protection assembly (1), the cover of which is arranged outside the wellhead connection assembly (5); A protection connection component (7), wherein the wellhead protection component (1) is fixedly connected to the wellhead connection component (5) via the protection connection component (7).

2. The drilling hole high pressure water grouting hole protection device according to claim 1 is characterized in that: The protective connection assembly (7) comprises a first connection ring (6), a second connection ring (8) and a nut (71); The first connecting ring (6) is fixedly mounted on the bottom of the side wall of the wellhead protection assembly (1); The second connecting ring (8) is fixedly mounted on the bottom of the side wall of the wellhead connecting assembly (5); The first connecting ring (6) and the second connecting ring (8) are both provided with screw holes, and the nut (71) passes through the screw holes of the first connecting ring (6) and the second connecting ring (8) to connect and fix them.

3. The drilling hole high pressure water grouting hole protection device according to claim 2 is characterized in that: The wellhead connection assembly (5) comprises an upper connection piece (51) and a lower connection piece (52) which are fixedly connected; The diameter of the upper connecting piece (51) is smaller than the diameter of the lower connecting piece (52).

4. The drilling hole high pressure water grouting hole protection device according to claim 3 is characterized in that: The inner side of the double-open working sleeve (9) is provided with an internal thread; The bottom of the side wall of the lower connecting member (52) is provided with an external thread; The two-open working sleeve (9) and the lower connecting piece (52) are threadedly connected.

5. The drilling hole high pressure water grouting hole protection device according to claim 4 is characterized in that: The side wall of the wellhead protection component (1) is provided with an observation window (2) corresponding to the pressure gauge (3).

6. The drilling hole high pressure water grouting hole protection device according to claim 5 is characterized in that: Also includes a grouting pipeline (4); The head end of the grouting pipeline (4) is connected to the upper connecting piece (51).

7. The drilling hole high pressure water grouting hole protection device according to claim 6 is characterized in that: A grouting opening (11) is provided on the side wall of the wellhead protection component (1); The tail end of the grouting pipeline (4) extends out from the grouting opening (11).

8. The drilling hole high pressure water grouting hole protection device according to claim 7 is characterized in that: The first connecting ring (6) and the second connecting ring (8) are annular iron sheets.

9. The drilling hole high pressure water grouting hole protection device according to claim 8, characterized in that: The wellhead protection component (1) is a discarded casing.

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