Drill bit stabilizing device of direct circulation drilling machine

Abstract

The utility model discloses a direct circulation drilling machine drill bit stabilizing device which comprises a center drill rod, a stabilizing mechanism comprises a supporting rod, and stabilizing rods are fixedly installed on the surface of the top of a lower ring belt and the surface of the top of an upper ring belt respectively. According to the direct circulation drilling machine drill bit stabilizing device, the stabilizing mechanism is additionally arranged, the effect of the contact face between a drill bit and a hole wall can be increased through a lower ring belt and an upper ring belt during drilling of the drill bit, and therefore the stability during hole forming is improved; the double-ring belt drill bit of the direct circulation drilling machine is prevented from swinging to different degrees or drilling direction changing when the double-ring belt drill bit of the direct circulation drilling machine encounters different soil layer junctions or when stress is uneven, and the problem that at present, a single-ring belt is arranged at the front end of a drill bit of a conventional cast-in-situ bored pile according to the hole diameter is solved. In the drilling process, when different soil layer connection positions or uneven stress occurs, the situations of large drill hole deformation and different hole diameters are easily caused, and when the situation is serious, hole collapse can be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of positive circulation drilling rig drill bit stabilization, in particular to a positive circulation drilling rig drill bit stabilization device. Background Art

[0002] Bored piles are a construction method in which pile holes are formed by mechanical drilling under the condition of mud wall protection, and concrete is poured using the catheter method. However, there are many factors that affect the quality of bored pile construction, among which the quality of drilling rig hole formation is an important step in quality control. If there is any carelessness or lax measures, quality accidents will occur during pouring, causing significant economic losses.

[0003] At present, a single-loop belt is set at the front end of the drill bit of the conventional bored pile positive circulation drilling rig according to the hole size. When encountering the junction of different soil layers or uneven force during the drilling process, it is easy to cause large deformation of the drill hole and different hole sizes. In severe cases, it will cause problems such as hole collapse.

[0004] To this end, the utility model provides a positive circulation drilling rig drill bit stabilizing device to solve the above-mentioned problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a positive circulation drilling rig drill bit stabilizing device to solve the above problems.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a positive circulation drilling rig drill bit stabilizing device, including a center drill rod, a connecting mechanism and a stabilizing mechanism are respectively arranged below the center drill rod, the stabilizing mechanism includes a support rod, a lower circle belt and an upper circle belt are respectively fixedly installed at both ends of the support rod, and a stabilizing rod is respectively fixedly installed on the top surface of the lower circle belt and the top surface of the upper circle belt.

[0007] Furthermore, the lower belt and the upper belt can increase the contact surface between the drill bit and the hole wall when drilling, thereby increasing the stability of the hole and preventing the double-belt drill bit of the positive circulation drilling rig from swinging or changing direction to varying degrees when encountering the junction of different soil layers or uneven force. This solves the problem that the front end of the drill bit of the current conventional bored pile positive circulation drilling rig is set with a single belt according to the hole size, which can easily lead to large deformation of the drill hole and different hole sizes when encountering the junction of different soil layers or uneven force during the drilling process, and in severe cases, it can cause hole collapse and other problems.

[0008] According to the above technical solution, the connection mechanism includes a first connection hole and a second connection hole, and the first connection hole and the second connection hole are respectively opened on the bottom end surface of the center drill rod and penetrate the inside.

[0009] Furthermore, by respectively opening a first connection hole and a second connection hole on the bottom end surface of the center drill rod and penetrating the interior, the drill bit can be effectively installed and removed.

[0010] By adopting the above technical solution, the other ends of the support rods of the stabilizing mechanism are respectively fixedly mounted on the outer surface of the central drill rod.

[0011] Furthermore, the central drill rod can effectively provide a stable installation position for the support rods respectively installed on the outer surface.

[0012] By adopting the above technical solution, a centralizer is fixedly installed on the outer surface of the center drill rod.

[0013] Furthermore, the centralizer has a strong anti-deflection ability and a small rotational resistance through the spiral centralizing bar, which is conducive to the return of drill cuttings. At the same time, it can effectively prevent the drill from getting stuck at irregular well walls, prevent annular space blockage, reduce the probability of drill sticking, and improve drilling efficiency.

[0014] By adopting the above technical solution, a drill rod handle is fixedly installed on the top end of the central drill rod, and slots are respectively provided on the outer sides of the drill rod handle.

[0015] Furthermore, the clamping grooves respectively provided on the outer side of the drill rod handle can effectively be mechanically clamped and fixed to an external position.

[0016] By adopting the above technical solution, a connector is fixedly installed on the top end of the drill rod handle.

[0017] Furthermore, the top connector installed on the drill rod handle can be effectively connected to external machinery.

[0018] Beneficial Effects

[0019] The utility model provides a positive circulation drilling rig drill bit stabilizing device. Compared with the prior art, it has the following beneficial effects:

[0020] 1. The positive circulation drilling rig drill bit stabilizing device, by adding a stabilizing mechanism, can increase the contact surface between the drill bit and the hole wall through the lower circle belt and the upper circle belt when the drill bit is drilling, thereby increasing the stability during hole forming, and preventing the double-circle belt drill bit of the positive circulation drilling rig from swinging or changing direction to varying degrees when encountering the junction of different soil layers or uneven force. It solves the problem that the front end of the drill bit of the current conventional bored cast-in-place pile positive circulation drilling rig is set with a single circle belt according to the hole size, which is easy to cause large deformation of the drill hole and different hole sizes when encountering the junction of different soil layers or uneven force during drilling, and in severe cases, it may cause hole collapse and other problems.

[0021] 2. The positive circulation drilling rig drill bit stabilizing device, by adding a stabilizer and a spiral straightening bar, has a strong anti-deflection ability and a small rotation resistance, which is conducive to the return of drill cuttings. At the same time, it can effectively prevent the drill from getting stuck at irregular well walls, prevent annular space blockage, reduce the probability of drill bit sticking, and improve drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a main structural schematic diagram of the utility model;

[0024] Figure 2 It is a front view structural schematic diagram of the utility model;

[0025] Figure 3 It is a left-side half-section structural schematic diagram of the utility model;

[0026] Figure 4 It is a schematic diagram of a partially half-section structure of the utility model from the left side;

[0027] Figure 5 It is an enlarged structural schematic diagram of point A of the utility model.

[0028] In the figure: 1. center drill rod; 2. connecting mechanism; 21. first connecting hole; 22. second connecting hole; 3. stabilizing mechanism; 31. support rod; 32. lower circle belt; 33. upper circle belt; 34. stabilizing rod; 4. centralizer; 5. drill rod handle; 6. slot; 7. connector. DETAILED DESCRIPTION

[0029] It should be noted that in the description of the embodiments of the present application, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0030] The present application is further described in detail below through drawings and examples.

[0031] Reference Figures 1 to 5 The embodiment of the present application provides a drill bit stabilizing device for a positive circulation drilling rig, comprising a center drill rod 1, a connecting mechanism 2 and a stabilizing mechanism 3 are respectively arranged below the center drill rod 1, the stabilizing mechanism 3 comprises a support rod 31, a lower belt 32 and an upper belt 33 are respectively fixedly installed at both ends of the support rod 31, and a stabilizing rod 34 is respectively fixedly installed on the top surface of the lower belt 32 and the top surface of the upper belt 33, and the stabilizing mechanism 3 is through the lower belt 32 and the upper belt 33 installed at both ends of the support rod 31, which can increase the contact surface with the hole wall when the drill bit is drilling, thereby increasing the stability during hole forming, and preventing the double belt drill bit of the positive circulation drilling rig from swinging or changing direction to different degrees when encountering the junction of different soil layers or uneven force, and the stabilizing rod 34 respectively installed on the top surface of the lower belt 32 and the top surface of the upper belt 33 can play an effective stabilizing support effect.

[0032] Reference Figures 1 to 5 In one aspect of the present embodiment, the connecting mechanism 2 includes a first connecting hole 21 and a second connecting hole 22, and the first connecting hole 21 and the second connecting hole 22 are respectively opened on the bottom end surface of the center drill rod 1 and penetrate the interior. The connecting mechanism 2 can effectively install and disassemble the drill bit through the first connecting hole 21 and the second connecting hole 22 respectively opened on the bottom end surface of the center drill rod 1 and penetrate the interior.

[0033] Reference Figures 1 to 5 In one aspect of this embodiment, the other ends of the support rods 31 of the stabilizing mechanism 3 are respectively fixedly mounted on the outer surface of the center drill rod 1, and the center drill rod 1 can effectively provide a stable installation position for the support rods 31 respectively mounted on the outer surface.

[0034] Reference Figures 1 to 5 In one aspect of the present embodiment, a centralizer 4 is fixedly installed on the outer surface of the center drill pipe 1. The centralizer 4 installed on the outer surface of the center drill pipe 1 has a strong anti-deflection ability and a small rotation resistance through a spiral centralizer bar, which is conducive to the return of drill cuttings. At the same time, it can effectively prevent getting stuck at irregular well walls, prevent annular space blockage, reduce the probability of drill sticking, and improve drilling efficiency.

[0035] Reference Figures 1 to 5 In one aspect of this embodiment, a drill rod handle 5 is fixedly installed on the top of the center drill rod 1, and a clamping groove 6 is respectively opened on the outside of the drill rod handle 5. The clamping groove 6 respectively opened on the outside of the drill rod handle 5 can effectively be mechanically clamped and fixed with the outside.

[0036] Reference Figures 1 to 5In one aspect of this embodiment, a connector 7 is fixedly installed on the top of the drill rod shank 5, and the connector 7 installed on the top of the drill rod shank 5 can be effectively connected to external machinery.

[0037] Working principle: The connection mechanism 2 can effectively install and remove the drill bit by means of a first connection hole 21 and a second connection hole 22 which are respectively opened on the bottom end surface of the center drill rod 1 and penetrate the inside.

[0038] The stabilizing mechanism 3 is through the lower circle belt 32 and the upper circle belt 33 installed at both ends of the support rod 31, which can increase the contact surface with the hole wall when the drill bit is drilling, thereby increasing the stability during hole formation and preventing the double circle belt drill bit of the positive circulation drilling rig from swinging or changing direction to varying degrees when encountering the junction of different soil layers or uneven force. The stabilizing rods 34 installed on the top surface of the lower circle belt 32 and the top surface of the upper circle belt 33 can effectively provide stable support. The other ends of the support rods 31 are respectively installed on the outer surface of the center drill rod 1.

[0039] The centralizer 4 is installed on the outer surface of the center drill pipe 1. The centralizer 4 has a strong anti-deflection ability and a small rotation resistance through the spiral centralizer bar, which is conducive to the return of drill cuttings. At the same time, it can effectively prevent the drill from getting stuck at irregular well walls and annular space blockage, reduce the probability of drill sticking, and improve drilling efficiency.

[0040] The card grooves 6 respectively opened on the outside of the drill rod handle 5 can effectively be engaged and fixed with external machinery. The bottom end of the drill rod handle 5 is installed on the top of the central drill rod 1, and the connecting head 7 installed on the top of the drill rod handle 5 can effectively connect with external machinery.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A positive circulation drilling rig drill bit stabilizing device, comprising a center drill rod (1), characterized in that: A connecting mechanism (2) and a stabilizing mechanism (3) are respectively arranged below the central drill rod (1), and the stabilizing mechanism (3) comprises a support rod (31), and a lower circle belt (32) and an upper circle belt (33) are respectively fixedly installed at both ends of the support rod (31), and a stabilizing rod (34) is respectively fixedly installed on the top surface of the lower circle belt (32) and the top surface of the upper circle belt (33).

2. A positive circulation drilling rig drill bit stabilizing device according to claim 1, characterized in that: The connecting mechanism (2) comprises a first connecting hole (21) and a second connecting hole (22), wherein the first connecting hole (21) and the second connecting hole (22) are respectively opened on the bottom end surface of the center drill rod (1) and penetrate the interior.

3. The positive circulation drilling rig drill bit stabilizing device according to claim 1, characterized in that: The other ends of the support rods (31) of the stabilizing mechanism (3) are respectively fixedly mounted on the outer surface of the central drill rod (1).

4. The positive circulation drilling rig drill bit stabilizing device according to claim 1, characterized in that: A centralizer (4) is fixedly mounted on the outer surface of the central drill rod (1).

5. The positive circulation drilling rig drill bit stabilizing device according to claim 1, characterized in that: A drill rod handle (5) is fixedly mounted on the top end of the central drill rod (1), and clamping grooves (6) are respectively provided on the outer sides of the drill rod handle (5).

6. A positive circulation drilling rig drill bit stabilizing device according to claim 5, characterized in that: A connector (7) is fixedly mounted on the top of the drill rod handle (5).

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