Anti-falling device for drilling tool and drilling tool applying same

Abstract

The anti-falling device comprises an anti-falling connector and an anti-falling connecting rod, an elevator groove is formed in the outer surface of the anti-falling connector, a cavity is formed in the anti-falling connector, one end of the anti-falling connecting rod extends into the cavity, the other end of the anti-falling connecting rod is located outside the cavity, and the anti-falling connector is connected with the elevator groove. An anti-falling nut and an anti-falling hexagon are arranged at the end, extending into the cavity, of the anti-falling connecting rod. According to the anti-falling device for the drilling tool, the anti-falling device and the lifting device are combined together, the anti-falling function and the lifting function can be achieved through one device, when the drilling tool is in the lifting state and the drilling state, operation is conducted through the falling clamping groove of the anti-falling connector, the manufacturing cost of the lifting connector is saved, and meanwhile maintenance of the drilling tool is simpler. Meanwhile, the anti-falling hexagon is additionally arranged below the anti-falling nut, and when the anti-falling effect is achieved, the anti-falling hexagon can reduce the impact load borne by the threads of the anti-falling nut.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum drilling tools, in particular to a drilling tool anti-drop device and a drilling tool using the same. Background Art

[0002] With the development of technology and the continuous improvement of drilling requirements, high-speed and high-torque drilling tools have become iconic drilling tools. In actual drilling operations, since the service life of each part is not the same, it is necessary to lift the drilling tool regularly to replace the parts that have reached the end of their service life. In modern drilling projects, the lifting device used is to install a drilling tool lifting joint at the upper end of the drilling tool to lift the drilling tool. In addition, due to the continuous increase in speed and torque, the service life of parts is also reduced, and safety accidents underground are more likely to occur, such as the frequent occurrence of the drive shaft shaft head at the lower end of the drilling tool. If a break occurs, the drill bit will drive the connecting rod connected to the internal parts to move downward, so the anti-drop and lifting device of the drilling tool becomes particularly important.

[0003] The existing anti-drop and lifting devices for drilling tools are two separate devices, which respectively realize the anti-drop and lifting functions of the drilling tools. Both the anti-drop and lifting devices need to be maintained or replaced separately, which makes the maintenance of the drilling tools more frequent and complicated, and also increases the production cost and maintenance cost of the drilling tools. Utility Model Content

[0004] To this end, one purpose of the utility model is to propose an anti-drop device for drilling tools and drilling tools using the same, combining the functions of the lifting joint of the traditional structure with the anti-drop joint to solve the problems mentioned in the background technology and overcome the shortcomings of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A drilling tool anti-drop device comprises an anti-drop joint and an anti-drop connecting rod, wherein the outer surface of the anti-drop joint is provided with a hanging card groove, the interior of the anti-drop joint is provided with a cavity, one end of the anti-drop connecting rod extends into the cavity, the other end of the anti-drop connecting rod is located outside the cavity, and the end of the anti-drop connecting rod extending into the cavity is provided with an anti-drop nut and an anti-drop hexagon.

[0007] Furthermore, a clamping platform is provided in the cavity, and the inner diameter of the clamping platform is smaller than the outer diameter of the anti-drop hexagonal.

[0008] Furthermore, the cavity includes a first cavity, a second cavity and a third cavity, and one end of the anti-drop connecting rod extending into the cavity is located in the second cavity.

[0009] Furthermore, the first cavity, the second cavity and the third cavity are connected, the second cavity is located between the first cavity and the third cavity, and the card platform is located between the second cavity and the third cavity.

[0010] Furthermore, the number of the hanging card slot is at least one.

[0011] Furthermore, the axis of the anti-drop joint and the axis of the anti-drop connecting rod are located on the same straight line.

[0012] Furthermore, the hanging card slot includes a bottom edge and two side edges, and the two side edges have a certain angle with the bottom edge.

[0013] The utility model also provides a drilling tool, comprising the above-mentioned anti-drop device for drilling tools, characterized in that it also comprises a drill bit, and the drill bit is connected to the anti-drop device.

[0014] Therefore, the utility model has the following beneficial effects:

[0015] The utility model discloses an anti-drop device for drilling tools, which combines the anti-drop device with the lifting device, and can realize the two functions of anti-drop and lifting through one device. When the drilling tool is in the state of drilling up or drilling down, the operation is performed through the drop-card groove of the anti-drop joint, which saves the manufacturing cost of the lifting joint and makes the maintenance of the drilling tool simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the anti-drop device of the utility model;

[0017] Figure 2 It is a cross-sectional view of the anti-drop joint of the utility model;

[0018] Figure 3 It is a cross-sectional view of the anti-drop connecting rod of the utility model;

[0019] Figure 4 It is a cross-sectional view of another state of the anti-drop device of the utility model;

[0020] Figure 5 This is a structural schematic diagram of the utility model hanging card slot;

[0021] Figure 6 This is another structural schematic diagram of the hanging card slot of the utility model;

[0022] Figure 7 This is a third structural schematic diagram of the hanging card slot of the utility model;

[0023] Figure 8 This is a fourth structural schematic diagram of the hanging card slot of the utility model;

[0024] Fig. 9 This is a fifth structural schematic diagram of the hanging card slot of the utility model;

[0025] Fig.10 This is a sixth structural schematic diagram of the hanging card slot of the utility model.

[0026] In the figure: 1. Anti-drop joint; 2. Anti-drop connecting rod; 3. Anti-drop nut; 4. Anti-drop hexagon; 5. First cavity; 6. Second cavity; 7. Third cavity; 8. Hanging card slot; 9. Card table; 10. Bottom edge; 11. First side edge; 12. Second side edge. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 As shown, an anti-drop device for drilling tools includes an anti-drop joint 1 and an anti-drop connecting rod 2. The outer surface of the anti-drop joint 1 is provided with a hanging slot 8, and the interior of the anti-drop joint 1 is provided with a cavity. One end of the anti-drop connecting rod 2 extends into the cavity, and the other end of the anti-drop connecting rod 2 is located outside the cavity. The end of the anti-drop connecting rod 2 extending into the cavity is provided with an anti-drop nut 3 and an anti-drop hexagon 4.

[0030] like Figure 2 As shown, the anti-drop joint 1 is generally cylindrical in shape, and a plurality of cavities are provided in the cylindrical anti-drop joint 1 along the axial direction. Figure 3 As shown, one end of the anti-drop connecting rod 2 is defined as the first end, and the other end of the anti-drop connecting rod 2 is defined as the second end. The first end of the anti-drop connecting rod 2 is provided with an anti-drop nut 3 and an anti-drop hexagon 4. The anti-drop nut 3 is wrapped around the head of the first end of the anti-drop connecting rod 2, and the anti-drop hexagon 4 is arranged adjacent to the anti-drop nut 3. The first end of the anti-drop connecting rod 2 is arranged in the cavity of the anti-drop joint 1, and the second end of the anti-drop connecting rod 2 extends out of the cavity of the anti-drop joint 1. The second end of the anti-drop connecting rod 2 can be used to connect a drill bit.

[0031] Specifically, the anti-drop nut 3 can be a nut, and the anti-drop hexagon 4 can be a hexagonal nut. The inner surfaces of the anti-drop nut 3 and the anti-drop hexagon 4 are provided with internal threads, and the outer surface of the first end of the anti-drop connecting rod 2 is provided with external threads. The anti-drop nut 3 and the anti-drop hexagon 4 are connected and fixed to the first end of the anti-drop connecting rod 2 by threaded cooperation.

[0032] When an underground fracture accident occurs, the anti-drop hexagonal nut 4 can play a good role in resisting impact, making the threaded connection of the anti-drop nut 3 not easily damaged, thereby ensuring the normal operation of the anti-drop function.

[0033] like Figure 1 As shown, a hanging card slot 8 is provided on the outer side of the anti-drop joint 1.

[0034] The utility model provides an anti-drop device for drilling tools, which combines the anti-drop device with the lifting device. The two functions of anti-drop and lifting can be realized through one device. When the drilling tool is in the drilling state, the operation is performed through the drop-card groove of the anti-drop joint 1. While saving the manufacturing cost of the lifting joint, the maintenance of the drilling tool is simpler.

[0035] As an implementation mode, the hanging card slot 8 is arranged around the outer side of the anti-drop joint 1 .

[0036] When the drilling tool is in the state of drilling up or drilling down, the operation is performed through the drop-off groove of the anti-drop-off joint 1, which can save the manufacturing cost of the lifting joint.

[0037] As an implementation manner, there are two hanging card slots 8, and the two hanging card slots 8 are respectively arranged on both sides of the anti-drop joint 1, and the two hanging card slots 8 are not connected end to end.

[0038] Specifically, a card platform 9 is provided in the cavity, and the inner diameter of the card platform 9 is smaller than the outer diameter of the anti-drop hexagonal 4. The card platform 9 is arranged around the inside of the cavity to form an inner hole with a smaller aperture.

[0039] In high-torque drilling platforms, the transmission shaft head at the lower end of the drill often breaks. If it breaks, the drill will drive the anti-drop connecting rod 2 connected to the internal parts to move downward, and the difference between the anti-drop nut 3, the anti-drop hexagon 4 and the inner diameter of the anti-drop joint 1 clamp 9 will prevent the parts from falling further. Figure 4 shown.

[0040] The anti-drop device provided by the utility model combines the function of the traditional structure of the lifting joint with the anti-drop joint 1. It has a simple structure and can effectively reduce the production cost. At the same time, the anti-drop hexagon 4 is installed below the anti-drop nut 3. When playing the anti-drop function, the anti-drop hexagon 4 can reduce the impact load on the thread of the anti-drop nut 3.

[0041] like Figure 2As shown, the cavity includes a first cavity 5 , a second cavity 6 and a third cavity 7 , and one end of the anti-drop connecting rod 2 extending into the cavity is located in the second cavity 6 .

[0042] More specifically, the first cavity 5 , the second cavity 6 and the third cavity 7 are interconnected, the second cavity 6 is located between the first cavity 5 and the third cavity 7 , and the card table 9 is located between the second cavity 6 and the third cavity 7 .

[0043] As an implementation mode, the cross section of the first cavity 5 is trapezoidal.

[0044] As an implementation manner, the cross-section of the first cavity 5 is rectangular.

[0045] As an implementation manner, the cross section of the second cavity 6 is a square.

[0046] As an implementation manner, the cross-section of the second cavity 6 is rectangular.

[0047] As an implementation manner, the cross section of the third cavity 7 is a square.

[0048] As an implementation mode, the cross section of the third cavity 7 is a special shape composed of a trapezoid and a square.

[0049] As an implementation manner, the inner diameter of the first cavity 5 is greater than the inner diameter of the second cavity 6 .

[0050] As an implementation manner, the inner diameter of the third cavity 7 is greater than the inner diameter of the second cavity 6 .

[0051] As an implementation manner, the inner diameter of the first cavity 5 is greater than the inner diameter of the third cavity 7 .

[0052] As an implementation manner, the inner diameter of the first cavity 5 is greater than the inner diameter of the third cavity 7 , and the inner diameter of the third cavity 7 is greater than the inner diameter of the second cavity 6 .

[0053] As an implementation mode, the inner diameters of the first cavity 5 , the second cavity 6 , and the third cavity 7 are equal.

[0054] That is to say, the cross-sectional shape and inner diameter size relationship of the first cavity 5, the second cavity 6 and the third cavity 7 of the present invention are not fixed and can be selectively set according to specific usage scenarios or situations.

[0055] Specifically, the number of the hanging card slot 8 is at least one.

[0056] As an implementation manner, the number of the hanging card slot 8 is one.

[0057] As an implementation method, Fig.10 As shown, the number of the hanging card slots 8 is 2.

[0058] As an implementation manner, the number of the hanging card slots 8 is three.

[0059] That is to say, the present invention does not impose any specific restriction on the number of the lifting slots 8, and any number of the lifting slots 8 that can be used to lift the drilling tool is within the protection scope of the present invention.

[0060] Furthermore, the axis of the anti-drop joint 1 and the axis of the anti-drop connecting rod 2 are located on the same straight line.

[0061] Furthermore, the hanging card slot 8 includes a bottom edge 10 and two side edges, and the two side edges have a certain angle with the bottom edge 10 .

[0062] like Figure 5-Figure 10 As shown, in the hanging card slot 8, the side located on the left side of the bottom edge 10 is defined as the first side edge 11, and the side located on the right side of the bottom edge 10 is defined as the second side edge 12. Figure 8 As shown, the included angle between the first side 11 and the bottom 10 is α, and the included angle between the second side 12 and the bottom 10 is β.

[0063] like Figure 5 As shown, as an embodiment, the first side 11 of the hanging card slot 8 is perpendicular to the bottom 10, the connection between the first side 11 and the bottom 10 is a smooth rounded corner, the first side 11 is a straight line, the angle β between the second side 12 of the hanging card slot 8 and the bottom 10 is an acute angle, and the second side 12 is an arc.

[0064] like Figure 6 As shown, as an implementation manner, the first side 11 of the hanging card slot 8 is perpendicular to the bottom 10 , and the second side 12 of the hanging card slot 8 is perpendicular to the bottom 10 .

[0065] like Figure 7 As shown, as an embodiment, the angle α between the first side 11 and the bottom 10 of the hanging card slot 8 is an acute angle, the first side 11 is a straight line, the angle β between the second side 12 and the bottom 10 of the hanging card slot 8 is an acute angle, and the second side 12 is an arc.

[0066] like Figure 8 As shown, as an embodiment, the angle α between the first side 11 and the bottom 10 of the hanging card slot 8 is an acute angle, and the angle β between the second side 12 and the bottom 10 of the hanging card slot 8 is an acute angle, and the angles are equal.

[0067] like Fig. 9 As shown, as an embodiment, the angle α between the first side 11 and the bottom 10 of the hanging card slot 8 is an acute angle, the angle β between the second side 12 and the bottom 10 of the hanging card slot 8 is an obtuse angle, and the sum of the two angles is 180°.

[0068] like Fig.10 As shown, as an implementation mode, the number of the hanging card slots 8 is 2, and the two hanging card slots 8 have the same shape and size.

[0069] As an implementation manner, the number of the hanging card slots 8 is 3, and the 3 hanging card slots 8 have the same shape and size.

[0070] As an implementation manner, when the angle α between the first side 11 and the bottom 10 of the hanging slot 8 is an acute angle, α=30°.

[0071] As an implementation manner, when the angle α between the first side 11 and the bottom 10 of the hanging card slot 8 is an acute angle, α=45°.

[0072] As an implementation manner, when the angle α between the first side 11 and the bottom 10 of the hanging slot 8 is an acute angle, α=60°.

[0073] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging slot 8 is an acute angle, β=30°.

[0074] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging slot 8 is an acute angle, β=45°.

[0075] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging slot 8 is an acute angle, β=60°.

[0076] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging card slot 8 is an obtuse angle, β=150°.

[0077] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging slot 8 is an obtuse angle, β=135°.

[0078] As an implementation manner, when the angle β between the second side 12 and the bottom 10 of the hanging slot 8 is an obtuse angle, β=120°.

[0079] That is to say, the number of the hanging card slots 8, the shape of the hanging card slots 8, and the angle between the bottom edge 10 and the side of the hanging card slots 8 can be selectively set according to actual needs. The utility model does not specifically limit the number of the hanging card slots 8, the shape of the hanging card slots 8, and the angle between the bottom edge 10 and the side of the hanging card slots 8. The number of the hanging card slots 8, the shape of the hanging card slots 8, and the angle between the bottom edge 10 and the side of the hanging card slots 8 that can realize the lifting of the drilling tool through the hanging card slots 8 are all within the protection scope of the utility model.

[0080] The utility model also provides a drilling tool, comprising the above-mentioned anti-drop device for drilling tools, characterized in that it also comprises a drill bit, and the drill bit is connected to the anti-drop device.

[0081] Specifically, the drilling tool may be a screw drilling tool.

[0082] More specifically, the screw drilling tool includes a filter, a one-way valve, a bypass valve assembly, an anti-drop device, a motor assembly, a universal shaft assembly, a transmission shaft assembly, and the like.

[0083] The utility model of the screw drill anti-drop device is to add an anti-drop hexagonal 4 at the anti-drop connecting rod 2 and the anti-drop nut 3, and at the same time process a hanging slot 8 on the outer surface of the anti-drop joint 1. When an underground fracture accident occurs, the anti-drop hexagonal 4 can effectively reduce the impact load of the thread of the anti-drop nut 3 caused by the falling of the drilling tool, thereby ensuring the effectiveness of the anti-drop. At the same time, during the process of drilling, the hanging slot 8 at the anti-drop joint 1 can well replace the lifting joint, thereby reducing the drilling cost.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] It is not difficult for those skilled in the art to understand that the utility model includes any combination of the utility model content and the specific implementation method part of the above specification and the various parts shown in the drawings. Due to the limited space and to make the specification concise, the various schemes composed of these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0086] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling tool anti-drop device, characterized in that: It includes an anti-drop joint and an anti-drop connecting rod. The outer surface of the anti-drop joint is provided with a hanging card groove, and a cavity is provided inside the anti-drop joint. One end of the anti-drop connecting rod extends into the cavity, and the other end of the anti-drop connecting rod is located outside the cavity. The end of the anti-drop connecting rod extending into the cavity is provided with an anti-drop nut and an anti-drop hexagon.

2. The drilling tool anti-drop device according to claim 1, characterized in that: A clamping platform is arranged in the cavity, and the inner diameter of the clamping platform is smaller than the outer diameter of the anti-drop hexagonal body.

3. The drilling tool anti-drop device according to claim 2, characterized in that: The cavity comprises a first cavity, a second cavity and a third cavity, and one end of the anti-drop connecting rod extending into the cavity is located in the second cavity.

4. The drilling tool anti-drop device according to claim 3, characterized in that: The first cavity, the second cavity and the third cavity are connected, the second cavity is located between the first cavity and the third cavity, and the card platform is located between the second cavity and the third cavity.

5. The drilling tool anti-drop device according to claim 1, characterized in that: The number of the hanging card slot is at least one.

6. The drilling tool anti-drop device according to claim 1, characterized in that: The axis of the anti-drop joint and the axis of the anti-drop connecting rod are located on the same straight line.

7. A drilling tool anti-drop device according to any one of claims 1 to 6, characterized in that: The hanging card slot includes a bottom edge and two side edges, and the two side edges have a certain angle with the bottom edge.

8. A drilling tool, comprising a drilling tool anti-drop device according to any one of claims 1 to 7, characterized in that: Also included is a drill bit, which is connected to the anti-drop device.

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