Fishing device for foreign matters in hole

Abstract

The utility model discloses a device for salvaging foreign matters in a hole, which comprises a salvaging rod, the salvaging rod is provided with a working end and a connecting end, a fixed salvaging head and a movable salvaging head are arranged on the working end of the salvaging rod, the fixed salvaging head is fixedly connected with the salvaging rod, the movable salvaging head is in key connection with the salvaging rod, and a groove is arranged on the axis of the working end of the salvaging rod. A groove is formed in the fixed fishing head, a tension spring is arranged in the groove and connected with the fishing rod and the movable fishing head, the fixed fishing head comprises a plurality of fixed arc-shaped claws distributed circumferentially, the movable fishing head comprises a plurality of movable arc-shaped claws distributed circumferentially, and fishing gaps used for clamping foreign matter are formed between the fixed arc-shaped claws and the movable arc-shaped claws corresponding to the fixed arc-shaped claws. The fixed fishing head and the movable fishing head are driven to rotate through the fishing rod, so that foreign matters can be clamped between the fixed arc-shaped claw and the movable arc-shaped claw and / or wound on the fishing rod; by lifting the drill rod, the device and the foreign matter are fished out of the drill hole together, and the foreign matter such as a rope can be fished conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of salvaging devices, in particular to a salvaging device for foreign objects in a hole. Background Art

[0002] During the exploration and development of mineral resources, coalbed methane, water resources, hydrogeological exploration, and geothermal wells, accidents such as drill bit embedment, stuck drill, and drill drop often occur due to complex construction techniques and strata, large borehole diameters, and operational errors. Foreign objects such as ropes are also prone to falling into the hole. To ensure the quality of drilling and reduce the economic losses caused by accidents, foreign objects such as ropes must be promptly salvaged from the hole.

[0003] Existing salvage devices can usually only salvage drill rods and drill bits, and cannot salvage other foreign objects in the hole, such as ropes. Utility Model Content

[0004] Based on this, it is necessary to provide a foreign body salvage device in the hole to address the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a foreign body salvage device in a hole, comprising a salvage rod, the salvage rod having a working end and a connecting end, a fixed salvage head and a movable salvage head being mounted on the working end of the salvage rod, the fixed salvage head being fixedly connected to the salvage rod, the movable salvage head being key-connected to the salvage rod, a groove being provided on the axis of the working end of the salvage rod, a tension spring being provided in the groove, one end of the tension spring being connected to the salvage rod, and the other end of the tension spring being connected to the movable salvage head, the fixed salvage head comprising a plurality of circumferentially distributed fixed arc-shaped claws, the movable salvage head comprising a plurality of circumferentially distributed movable arc-shaped claws, the fixed arc-shaped claws corresponding to the movable arc-shaped claws one-to-one, and a salvage gap for clamping foreign bodies being provided between the fixed arc-shaped claws and the corresponding movable arc-shaped claws.

[0006] Preferably, the fixed fishing head further comprises a fixed sleeve, which is fixedly connected to the fishing rod and the fixed arc-shaped claws, and the fixed arc-shaped claws are circumferentially distributed on the fixed sleeve.

[0007] Preferably, the movable fishing head further comprises a circular plate and a spline sleeve, the circular plate is fixedly connected to the spline sleeve and the movable arc-shaped claws, and the movable arc-shaped claws are circumferentially distributed on the circular plate; in a natural state, the spline sleeve abuts against the fixed sleeve.

[0008] Preferably, a plurality of circumferentially distributed splines are fixed to the working end of the fishing rod, and the splines are connected to the spline sleeves.

[0009] Preferably, a first connecting ear is fixed on the circular plate, a second connecting ear is fixed in the groove, one end of the tension spring is connected to the first connecting ear, and the other end of the tension spring is connected to the second connecting ear.

[0010] Preferably, the end surface of the fixed arc-shaped claw facing the movable arc-shaped claw is provided with a first chamfer, and the first chamfer is located on the concave side of the fixed arc-shaped claw; the end surface of the movable arc-shaped claw facing the fixed arc-shaped claw is provided with a second chamfer, and the second chamfer is located on the concave side of the movable arc-shaped claw.

[0011] Compared with the prior art, the present technical solution has at least one of the following beneficial effects: by driving the fixed salvage head and the movable salvage head to rotate through the salvage rod, foreign matter can be stuck between the fixed arc-shaped claw and the movable arc-shaped claw, and / or entangled on the salvage rod; by lifting the drill rod, the device and the foreign matter can be salvaged out of the drill hole together, making it easier to salvage foreign matter such as ropes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an exploded view of an embodiment of the present invention;

[0013] Figure 2 A perspective view of an embodiment of the present invention;

[0014] Figure 3 This is a front view of an embodiment of the present utility model;

[0015] Figure 4 for Figure 3 Sectional view along line AA;

[0016] Figure 5 for Figure 3 Cross-sectional view along line BB;

[0017] In the figure, 1, fishing rod; 11, groove; 12, spline; 2, fixed fishing head; 21, fixed arc-shaped claw; 211, first chamfer; 22, fixed sleeve; 3, movable fishing head; 31, movable arc-shaped claw; 311, second chamfer; 32, circular plate; 33, spline sleeve; 4, tension spring; 5, fishing gap; 6, first connecting ear; 7, second connecting ear. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details 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 may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] See also Figures 1 to 5The embodiment of the present application provides a foreign body salvage device in a hole, including a salvage rod 1, which has a working end and a connecting end. A fixed salvage head 2 and a movable salvage head 3 are installed on the working end of the salvage rod 1. The fixed salvage head 2 is fixedly connected to the salvage rod 1, and the movable salvage head 3 is key-connected to the salvage rod 1. A groove 11 is opened on the axis of the working end of the salvage rod 1, and a tension spring 4 is provided in the groove 11. One end of the tension spring 4 is connected to the salvage rod 1, and the other end of the tension spring 4 is connected to the movable salvage head 3. The fixed salvage head 2 includes a plurality of circumferentially distributed fixed arc claws 21, and the movable salvage head 3 includes a plurality of circumferentially distributed movable arc claws 31. The fixed arc claws 21 correspond to the movable arc claws 31 one by one, and a salvage gap 5 for clamping foreign bodies is provided between the fixed arc claws 21 and the corresponding movable arc claws 31.

[0020] The fixed fishing head 2 further includes a fixed sleeve 22 , which is fixedly connected to the fishing rod 1 and the fixed arc-shaped claws 21 . The fixed arc-shaped claws 21 are circumferentially distributed on the fixed sleeve 22 .

[0021] The movable fishing head 3 also includes a circular plate 32 and a spline sleeve 33. The circular plate 32 is fixedly connected to the spline sleeve 33 and the movable arc-shaped claws 31. The movable arc-shaped claws 31 are distributed circumferentially on the circular plate 32. In the natural state, under the elastic force of the tension spring 4, the spline sleeve 33 abuts against the fixed sleeve 22.

[0022] In order to realize the key connection between the movable fishing head 3 and the fishing rod 1, a plurality of circumferentially distributed splines 12 are fixed to the working end of the fishing rod 1, and the splines 12 are key-connected with the spline sleeve 33.

[0023] In order to connect the tension spring 4 with the movable salvaging head 3, a first connecting ear 6 is fixed on the circular plate 32, and one end of the tension spring 4 is connected to the first connecting ear 6; in order to connect the tension spring 4 with the salvaging rod 1, a second connecting ear 7 is fixed in the groove 11, and the other end of the tension spring 4 is connected to the second connecting ear 7.

[0024] To facilitate the smooth insertion of foreign objects, such as ropes, into the salvage gap 5, a first chamfer 211 is provided on the end surface of the fixed curved claw 21 facing the movable curved claw 31. The first chamfer 211 is located on the inner concave side of the fixed curved claw 21. A second chamfer 311 is provided on the end surface of the movable curved claw 31 facing the fixed curved claw 21. The second chamfer 311 is located on the inner concave side of the movable curved claw 31. The design of the first chamfer 211 and the second chamfer 311 serves as a guide. When the salvage rod 1 drives the fixed salvage head 2 and the movable salvage head 3 to rotate, it facilitates the entry of foreign objects, such as ropes, into the salvage gap 5 and their insertion between the fixed curved claw 21 and the movable curved claw 31. Both the fixed curved claw and the movable curved claw 31 are arc-shaped, and the inner concave side of each of the fixed and movable curved claws 31 is the side where the arc-shaped structure is recessed inward.

[0025] The working principle of this embodiment:

[0026] When salvaging foreign objects such as ropes in a borehole, the connecting end of the salvage rod 1 is connected to the drill rod through a conversion joint, and the drill rod drives the salvage rod 1 into the borehole, so that the fixed salvage head 2 and the movable salvage head 3 are moved to a position where they can contact the foreign object such as the rope. The salvage rod 1 is then rotated by the drill rod, and the rotation direction of the salvage rod 1 is consistent with the direction of the inner concave side of the fixed arc-shaped claw 21 and the movable arc-shaped claw 31.

[0027] When the salvage rod 1 rotates, it directly drives the fixed salvage head 2 to rotate, and through the key connection between the spline 12 and the spline sleeve 33, it drives the movable salvage head 3 to rotate. As the fixed salvage head 2 and the movable salvage head 3 rotate, foreign matter, such as a long rope, may be directly entangled on the salvage rod 1 under the action of the fixed arc-shaped claw 21 and the movable arc-shaped claw 31. Due to the tensile deformation of the tension spring 4, foreign matter, such as one end of the rope, may also enter the salvage gap 5 and be stuck between the fixed arc-shaped claw 21 and the movable arc-shaped claw 31. Foreign matter, such as a long rope, may also be entangled on the salvage rod 1. By lifting the drill rod, the device and the foreign matter are salvaged out of the drill hole together.

[0028] That is, when the foreign object to be salvaged is a long rope, the fixed salvaging head 2 and the movable salvaging head 3 rotate, and the foreign object such as the long rope will be directly wrapped around the salvaging rod 1 under the action of the fixed arc-shaped claw 21 and the movable arc-shaped claw 31; when the foreign object to be salvaged is a short rope, the fixed salvaging head 2 and the movable salvaging head 3 rotate, and the foreign object such as the long rope will be stuck between the fixed arc-shaped claw 21 and the movable arc-shaped claw 31, thereby facilitating the salvage of the foreign object such as the rope.

[0029] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A foreign body salvaging device in a hole, comprising a salvage rod (1), characterized in that: The salvage rod (1) has a working end and a connecting end. A fixed salvage head (2) and a movable salvage head (3) are installed on the working end of the salvage rod (1). The fixed salvage head (2) is fixedly connected to the salvage rod (1), and the movable salvage head (3) is key-connected to the salvage rod (1). A groove (11) is provided on the axis of the working end of the salvage rod (1). A tension spring (4) is provided in the groove (11). One end of the tension spring (4) is connected to the salvage rod (1), and the other end of the tension spring (4) is connected to the movable salvage head (3). The fixed salvage head (2) includes a plurality of circumferentially distributed fixed arc claws (21). The movable salvage head (3) includes a plurality of circumferentially distributed movable arc claws (31). The fixed arc claws (21) correspond to the movable arc claws (31) one by one. A salvage gap (5) for clamping foreign objects is provided between the fixed arc claws (21) and the corresponding movable arc claws (31).

2. The in-hole foreign body salvaging device according to claim 1, characterized in that: The fixed salvaging head (2) further comprises a fixed sleeve (22), the fixed sleeve (22) being fixedly connected to the salvaging rod (1) and the fixed arc-shaped claws (21), and the fixed arc-shaped claws (21) being circumferentially distributed on the fixed sleeve (22).

3. The in-hole foreign body salvaging device according to claim 2, characterized in that: The movable fishing head (3) further comprises a circular plate (32) and a spline sleeve (33), wherein the circular plate (32) is fixedly connected to the spline sleeve (33) and the movable arc-shaped claw (31), and the movable arc-shaped claw (31) is circumferentially distributed on the circular plate (32); in a natural state, the spline sleeve (33) abuts against the fixed sleeve (22).

4. The in-hole foreign body salvaging device according to claim 3, characterized in that: A plurality of circumferentially distributed splines (12) are fixed to the working end of the salvage rod (1), and the splines (12) are key-connected to the spline sleeve (33).

5. The in-hole foreign body salvaging device according to claim 3, characterized in that: A first connecting ear (6) is fixed on the circular plate (32), a second connecting ear (7) is fixed in the groove (11), one end of the tension spring (4) is connected to the first connecting ear (6), and the other end of the tension spring (4) is connected to the second connecting ear (7).

6. The in-hole foreign body salvaging device according to any one of claims 1 to 5, characterized in that: The end surface of the fixed arc-shaped claw (21) facing the movable arc-shaped claw (31) is provided with a first chamfer (211), and the first chamfer (211) is located on the concave side of the fixed arc-shaped claw (21). The end surface of the movable arc-shaped claw (31) facing the fixed arc-shaped claw (21) is provided with a second chamfer (311), and the second chamfer (311) is located on the concave side of the movable arc-shaped claw (31).

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