Efficient drilling bit section for drilling rod and well casing integrated well completion device

Abstract

The invention discloses an efficient drilling bit section for a drill rod and well casing integrated well completion device, and relates to the technical field of well drilling equipment, the efficient drilling bit section comprises a bit axis tube, a drilling structure is arranged at one end of the bit axis tube, the drilling structure is used for drilling construction into a soil layer during well digging, and a water stop connecting structure is arranged at the other end of the bit axis tube. According to the drill bit, the length of the drill bit axis tube is increased to be larger than the length of the drill bit flying wing, so that a large space allowing sludge to pass through exists between the drill bit flying wing and the flange plate, and the situation that the surface of the drill bit flying wing is wrapped with the sludge is avoided; and the flange plate is arranged to be connected with the embedded drill rod section, so that the problem that the drill bit axis tube cannot be separated from the construction position after construction due to the fact that the length of the drill bit axis tube is too long is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a high-efficiency drilling drill bit section for a well-forming device integrating a drill rod and a well pipe. Background Art

[0002] When constructing underground projects in soft soil areas, due to the existence of pressurized aquifers composed mainly of silt and sandy soil layers in the foundation of the soft soil areas, water-rich silt and sandy soil layers at high groundwater levels, and under complex hydrogeological conditions, underground projects often experience seepage, leakage, sand leakage and other groundwater-related accidents and disasters during construction, construction, operation and maintenance.

[0003] At present, there are a variety of emergency rescue methods for underground engineering leakage and sudden surge disasters, and various emergency rescue methods are often used in combination in engineering. The dewatering and decompression method is an effective method for controlling the water pressure of confined aquifers with significant effect and low cost, but the construction speed of conventional dewatering wells is slow and the time required is long. The traditional dewatering and decompression method cannot meet the timeliness of emergency rescue. Secondly, the currently used rapid well drilling technology that integrates drill rods and well pipes has solved the problem of complex procedures of conventional well drilling technology, but it was found in engineering applications that when the drill bit drills into the silt layer, the silt is easy to wrap around the drill bit wings, which greatly reduces the drilling speed and affects the drilling efficiency. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency drilling bit section for a well-forming device integrating a drill pipe and a well pipe, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A high-efficiency drilling drill bit section for a well-forming device integrating a drill rod and a well pipe, comprising a drill bit axis tube, one end of which is provided with a drilling structure, and the drilling structure is used for drilling into a soil layer when drilling a well, and the other end of the drill bit axis tube is provided with a water-stop connection structure, and the water-stop connection structure is used for connecting a drilling rig or a nested drill rod section on the drilling rig, and the spacing between the water-stop connection structure and the drilling structure is greater than zero.

[0006] As a preferred solution of the present invention, the drilling structure includes a plurality of drill bit wings, and the plurality of drill bit wings are evenly distributed on the circumferential outer wall of the drill bit axis tube around the axis of the drill bit axis tube, and the angle formed with the axis of the drill bit axis tube is greater than zero, and each of the drill bit wings is provided with a plurality of alloy heads.

[0007] As a preferred solution of the present invention, the drill wing is in the shape of a right-angled trapezoid, and the side of the drill wing facing away from the drill axis tube is the hypotenuse of the right-angled trapezoid, multiple alloy heads are arranged on one side of the drill wing and extend along the hypotenuse, and the length of the drill axis tube is greater than the length of the drill wing.

[0008] As a preferred solution of the present invention, the water-stop connection structure includes a flange, and the flange can be fixedly connected to the nested drill rod section by bolts, a tubular water-stop structure section is provided on one side of the flange, a rubber pad groove is provided at the end of the water-stop structure section, a tubular external thread section is provided on the other side of the flange, an internal thread section is provided at the end of the drill bit axis tube, the internal thread section is used for threaded connection with the external thread section or the drilling rig, and the water-stop structure section, the external thread section and the drill bit axis tube are connected in sequence.

[0009] As a preferred solution of the present invention, the inner diameter of the water stop structure section decreases linearly along the direction from the water stop structure section to the external thread section.

[0010] As a preferred solution of the present invention, the diameter of the drill bit axis tube is smaller than the diameter of the internal thread section.

[0011] As a preferred solution of the present invention, a plurality of bolt holes are provided on the flange.

[0012] As a preferred solution of the present invention, the water-stop structure segment is provided with a water-stop structure segment slurry hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the length of the drill bit axis tube is extended to be greater than the length of the drill bit wing, so that there is a large space between the drill bit wing and the flange for mud to pass through, so as to avoid mud being wrapped around the surface of the drill bit wing, thereby avoiding the influence of mud on the drilling speed. In addition, by arranging the flange to be connected with the nested drill rod section, the problem that the drill bit axis tube cannot be separated from the construction position after construction due to its excessive length is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 A partial structural schematic diagram of a high-efficiency drilling drill bit section for a well-forming device integrating a drill pipe and a well pipe provided by the present invention.

[0016] Figure 2 A schematic structural diagram of the water-stop connection structure provided by the present invention; Figure 3 A schematic top view of the water-stop connection structure provided by the present invention; Figure 4 A bottom view schematically showing the water-stop connection structure provided by the present invention.

[0017] The numbers in the figure represent the following: 1. Alloy head; 2. Drill wing; 4. Drill axis tube; 5. Internal thread section; 7. Water-stop structure section; 8. Bolt hole; 9. Flange; 10. External thread section; 11. Slurry hole of water-stop structure section; 12. Rubber pad groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0020] like Figures 1 to 4 As shown, the present invention provides a high-efficiency drilling drill bit section for a well-forming device integrating a drill rod and a well pipe, comprising a drill bit axis tube 4, one end of which is provided with a drilling structure, and the drilling structure is used for drilling into the soil layer when drilling a well, and the other end of the drill bit axis tube 4 is provided with a water-stop connection structure, and the water-stop connection structure is used to connect a drilling rig or a nested drill rod section on the drilling rig, and the spacing between the water-stop connection structure and the drilling structure is greater than zero.

[0021] The present application is applied when sudden surge or leakage disaster occurs in foundation pit engineering. When in use, first locate the area to be excavated, then fix the drill axis tube 4 on the compass of the drilling rig through a water-stop connection structure, and then start the drilling rig to drive the drill axis tube 4 to drive the drilling structure to drill the shallow soil mixed with gravel.

[0022] When the shallow soil drilling is completed, the drill bit axis tube 4 is removed, and then the drill bit axis tube 4 is fixed to the nested drill rod section on the drilling rig through the water-stop connection structure, and then the nested drill rod section is fixed to the compass of the drilling rig. At this time, the drilling work can be continued until the specified depth is reached. After the drilling work is completed, the dewatering well is completed. Then the compass of the drilling rig is rotated in the opposite direction to lift the entire nested drill rod section to near the ground. When disassembling the entire equipment, the nested drill rod section is first removed from the compass of the drilling rig, and then the drill bit axis tube 4 is removed from the nested drill rod section.

[0023] In the present application, the spacing between the water-stop connection structure and the drilling structure is greater than zero, that is, there is a large space between the drilling structure and the water-stop connection structure, so that the silt contacted by the drilling structure during the drilling process can pass through, avoiding the silt from being wrapped around the surface of the drilling structure and affecting the drilling speed.

[0024] Secondly, since there is a large space between the drilling structure and the water-stop connection structure, the length of the drill bit axis tube 4 is longer than the length of the axis tube used in the prior art, and the drilling rig has a maximum operating height. Therefore, a water-stop connection structure is set on the top of the drill bit axis tube 4, and the drill bit axis tube 4 can be installed on or removed from the nested drill rod segment by connecting or disassembling the water-stop connection structure to the nested drill rod segment. When disassembling, the nested drill rod segment is first removed from the compass of the drilling rig together with the drill bit axis tube 4, and then the drill bit axis tube 4 is removed to ensure that the drilling rig can be used normally when drilling a dewatering well.

[0025] The drilling structure includes a plurality of drill bit wings 2, and the plurality of drill bit wings 2 are evenly distributed around the axis of the drill bit shaft tube 4 on the peripheral outer wall of the end of the drill bit shaft tube 4, and the angle formed with the axis of the drill bit shaft tube 4 is greater than zero, and each drill bit wing 2 is provided with a plurality of alloy heads 1.

[0026] The drill wing 2 is in the shape of a right-angled trapezoid, and the side of the drill wing 2 facing away from the drill axis tube 4 is the hypotenuse of the right-angled trapezoid. Multiple alloy heads 1 are arranged on one side of the drill wing 2 and extend along the hypotenuse, and the length of the drill axis tube 4 is greater than the length of the drill wing 2.

[0027] The drilling rig drives the drill bit axis tube 4 to drive multiple drill bit wings 2 and multiple alloy heads 1 on the drill bit wings 2 to rotate synchronously, thereby drilling downward and crushing silt and gravel. The length of the drill bit axis tube 4 is greater than the length of the drill bit wings 2, and the drill bit wings 2 are located on the outer wall of the end side of the drill bit axis tube 4, so that there is a large space between the drill bit wings 2 and the water-stop connection structure, so that the silt can be shaken off when the drill bit wings 2 are drilling, avoiding the silt from being wrapped around the drill bit wings 2.

[0028] The water-stop connection structure includes a flange 9, and the flange 9 can be fixedly connected to the nested drill pipe section by bolts. A tubular water-stop structure section 7 is provided on one side of the flange 9, and a rubber pad groove 12 is provided at the end of the water-stop structure section 7. A tubular external thread section 10 is provided on the other side of the flange 9, and an internal thread section 5 is provided at the end of the drill bit axis tube 4. The internal thread section 5 is used for threaded connection with the external thread section 10 or the drilling rig, and the water-stop structure section 7, the external thread section 10 and the drill bit axis tube 4 are connected in sequence.

[0029] The drill bit shaft tube 4 is connected to the flange 9 by connecting the internal thread section 5 through the external thread section 10, and the flange 9 is fixed to the nested drill rod section by bolts, so that the drill bit shaft tube 4 is fixed to the drilling rig or the nested drill rod section for drilling work.

[0030] When the internal thread section 5 is directly connected to a drilling rig, the drilling rig can directly drive the drill bit shaft core tube 4 to drill into shallow soil.

[0031] The water-stop structure section 7 , the external thread section 10 and the drill bit axial tube 4 are interconnected, so that water during drilling can be extracted through the connecting area within the drill bit axial tube 4 , the external thread section 10 and the water-stop structure section 7 .

[0032] A rubber sealing pad is installed in the provided rubber pad groove 12 to stop water and avoid water leakage.

[0033] The inner diameter of the water stop structure section 7 decreases linearly along the direction from the water stop structure section 7 to the external thread section 10 .

[0034] The water-stop structure section 7 is tubular, and the inner diameter of the water-stop structure section 7 decreases linearly, in order to reduce the local head loss when the mud passes through this place.

[0035] The diameter of the drill shaft core tube 4 is smaller than the diameter of the internal thread section 5 .

[0036] Since the internal thread section 5 needs to be connected to the drilling rig, its size is fixed. In order to reduce the drilling resistance during drilling, the diameter of the drill bit shaft tube 4 should be minimized while ensuring the strength of the drill bit shaft tube 4, that is, the diameter of the drill bit shaft tube 4 needs to be smaller than the size of the internal thread section 5.

[0037] A plurality of bolt holes 8 are provided on the flange 9 .

[0038] The bolt holes 8 are used for mounting bolts.

[0039] The water stop structure section 7 is provided with a water stop structure section slurry hole 11 .

[0040] The slurry holes 11 of the water-stop structure section are used for allowing slurry to pass through.

[0041] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0042] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. An efficient drilling bit section for a well-forming device integrating a drill pipe and a well pipe, characterized in that: The drill bit shaft tube (4) comprises a drill bit shaft tube (4), one end of which is provided with a drilling structure, and the drilling structure is used for drilling into a soil layer when drilling a well, and the other end of the drill bit shaft tube (4) is provided with a water-stop connection structure, and the water-stop connection structure is used for connecting a drilling rig or a nested drill rod section on the drilling rig, and the spacing between the water-stop connection structure and the drilling structure is greater than zero.

2. The high-efficiency drilling drill bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 1, characterized in that: The drilling structure comprises a plurality of drill bit wings (2), and the plurality of drill bit wings (2) are evenly distributed on the peripheral outer wall of the drill bit axis tube (4) around the axis of the drill bit axis tube (4), and the angle formed with the axis of the drill bit axis tube (4) is greater than zero, and each of the drill bit wings (2) is provided with a plurality of alloy heads (1).

3. The high-efficiency drilling bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 2, characterized in that: The drill wing (2) is in the shape of a right-angled trapezoid, and the side of the drill wing (2) facing away from the drill axis tube (4) is the hypotenuse of the right-angled trapezoid. The plurality of alloy heads (1) are arranged on one side of the drill wing (2) and extend along the hypotenuse. The length of the drill axis tube (4) is greater than the length of the drill wing (2).

4. The high-efficiency drilling bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 1, characterized in that: The water-stop connection structure comprises a flange (9), and the flange (9) can be fixedly connected to the nested drill rod section by bolts, a tubular water-stop structure section (7) is provided on one side of the flange (9), and a rubber pad groove (12) is provided at the end of the water-stop structure section (7), and a tubular external thread section (10) is provided on the other side of the flange (9), and an internal thread section (5) is provided at the end of the drill bit axis tube (4), and the internal thread section (5) is used for threaded connection with the external thread section (10) or a drilling machine, and the water-stop structure section (7), the external thread section (10) and the drill bit axis tube (4) are connected in sequence.

5. The high-efficiency drilling bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 4, characterized in that: The inner diameter of the water stop structure section (7) decreases linearly along the direction from the water stop structure section (7) to the external thread section (10).

6. The high-efficiency drilling drill bit section for the integrated well-forming device of drill pipe and well pipe according to claim 4, characterized in that: The diameter of the drill bit shaft core tube (4) is smaller than the diameter of the internal thread section (5).

7. The high-efficiency drilling drill bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 4, characterized in that: The flange (9) is provided with a plurality of bolt holes (8).

8. The high-efficiency drilling drill bit section for a well-forming device integrating a drill pipe and a well pipe according to claim 4, characterized in that: The water-stop structure segment (7) is provided with a water-stop structure segment slurry hole (11).

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