Centralizing tool for fishing large-diameter drill bit

Abstract

The utility model provides a righting tool for fishing a large-diameter drill bit, which relates to the technical field of drilling and comprises a connecting rod, a first connecting plate, a righting piece and a hoisting structure fixedly arranged at the upper end of the connecting rod. The first connecting plate is perpendicular to the connecting rod and connected to the lower end of the connecting rod, the centralizing piece comprises a vertical rod and a centralizing plate, the upper side of the vertical rod is connected with the first connecting plate, and the lower end of the vertical rod is fixedly connected with the centralizing plate; the connecting rod is arranged in the middle of the first connecting plate, the horizontal distance from the position, connected with the first connecting plate, of the vertical rod to the vertical axis of the connecting rod is larger than the maximum diameter of a drill bit to be centralized, and the side, close to the vertical axis of the connecting rod, of the centralizing plate is provided with an inwards-concave arc-shaped face. The distance between the arc-shaped face and the vertical axis of the connecting rod from the end away from the vertical rod to the position close to the vertical rod is gradually reduced so that the drill bit can be righting by rotating the first connecting plate. The tool is simple in structure, low in cost and capable of conveniently centralizing the drill bit and facilitating follow-up drill bit fishing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the drilling technology field especially, and it relates to a fishing large-diameter drill bit centralizing tool. BACKGROUND

[0002] In large-diameter drilling in recent years, once the drill bit falls to the hole bottom accident, it is often difficult to handle. Because the large-diameter well bore is larger, the drill bit is prone to be in an inverted inclined state after falling off, the common male taper female taper sleeve cannot hold the drill bit, fishing is inconvenient, and a large amount of time and manpower is often wasted for handling the drill bit accident. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model aims at providing a fishing large-diameter drill bit centralizing tool to conveniently and quickly centralize the drill bit in an inverted state at the well bottom and facilitate subsequent fishing.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A fishing large-diameter drill bit centralizing tool, comprising a connecting rod, a first connecting plate, a centralizing piece and a hoisting structure fixed to the upper end of the connecting rod;

[0006] The first connecting plate is perpendicular to the connecting rod and is connected to the lower end of the connecting rod, the centralizing piece comprises a vertical rod and a centralizing plate, the upper side of the vertical rod is connected to the first connecting plate, and the lower end of the vertical rod is fixedly connected to the centralizing plate;

[0007] The connecting rod is arranged at the middle part of the first connecting plate, the horizontal distance from the position where the vertical rod is connected to the first connecting plate to the vertical axis of the connecting rod is greater than the maximum diameter of the drill bit to be centralized, the centralizing plate is provided with a concave arc surface on the side close to the vertical axis of the connecting rod, and the distance from one end of the arc surface away from the vertical rod to the vertical axis of the connecting rod gradually decreases towards the position close to the vertical rod, so that the drill bit can be centralized by rotating the first connecting plate.

[0008] Optionally, when the centralizing plate centralizes the drill bit, the centralizing plate corresponds to the middle part of the drill bit.

[0009] The distance between the centralizing plate and the first connecting plate corresponds to the distance between the middle part of the drill bit and the thread for connecting the drill rod of the drill bit.

[0010] Optionally, the second connecting plate is further arranged on the upper side of the first connecting plate and is fixedly connected to the connecting rod, the two ends of the first connecting plate and the two ends of the second connecting plate are vertically arranged in correspondence, and the two ends of the first connecting plate and the two ends of the second connecting plate are arranged in correspondence with the inner side wall of the well.

[0011] Optionally, two ends of the first connecting plate are arc-shaped corresponding to the inner sidewall of the well, and two ends of the second connecting plate are arc-shaped corresponding to the inner sidewall of the well.

[0012] Optionally, the righting plate is detachably connected with the first connecting plate, and the second connecting plate is provided with a through hole corresponding to the vertical rod.

[0013] Optionally, the distance between the righting plate and the first connecting plate is adjustably arranged.

[0014] Optionally, the device further comprises a plug rod and a ring fixed to one end of the plug rod.

[0015] The vertical rod is vertically provided with a plurality of adjusting holes corresponding to the first connecting plate, the diameter of the plug rod corresponds to the diameter of the adjusting hole, the first connecting plate is provided with a bolt through hole corresponding to the ring, and the rotation of the righting plate is limited by passing the first bolt through the ring and the bolt through hole.

[0016] Optionally, the hoisting structure comprises a connecting piece and a hoisting rope,

[0017] The middle part of the connecting piece is fixedly connected with the connecting rod, and one mounting groove for mounting the hoisting rope is symmetrically arranged on each side of the connecting piece.

[0018] Optionally, the mounting groove is horizontally arranged, the opening end of the mounting groove is arranged on the end face near one side of the connecting piece, and the length direction of the mounting groove penetrates through the connecting piece.

[0019] Optionally, a vertically penetrating bolt hole is arranged near the opening end of the mounting groove.

[0020] Compared with the prior art, the salvage large-diameter drill bit righting tool has the following beneficial effects:

[0021] This application provides a tool for retrieving and straightening large-diameter drill bits, including a connecting rod, a first connecting plate, a straightening component, and a lifting structure fixed to the upper end of the connecting rod; the first connecting plate is perpendicular to the connecting rod and connected to the lower end of the connecting rod; the straightening component includes a vertical rod and a straightening plate, the upper side of the vertical rod is connected to the first connecting plate, and the lower end of the vertical rod is fixed to the straightening plate; the connecting rod is located in the middle of the first connecting plate, and the horizontal distance from the position where the vertical rod connects to the first connecting plate to the vertical axis of the connecting rod is greater than [missing information]. The maximum diameter of the drill bit to be straightened is specified. The straightening plate has a concave arc-shaped surface on the side near the vertical axis of the connecting rod. The distance from the end of the arc-shaped surface away from the vertical rod to the vertical axis of the connecting rod gradually decreases, facilitating the straightening of the drill bit by rotating the first connecting plate. This allows for the following operation when dealing with a dislodged drill bit: first, the connecting rod is used to lower the large-diameter drill bit straightening tool to the bottom of the hole; then, the arc-shaped surface of the straightening plate contacts the drill bit from the end away from the vertical rod, and the drill string is rotated to straighten the drill bit. The tool has a simple structure, low cost, and provides convenient drill bit straightening, facilitating subsequent drill bit retrieval. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a tool for retrieving and straightening large-diameter drill bits according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of another large-diameter drill bit straightening tool described in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection structure between a vertical rod and a first connecting plate according to an embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Connecting rod; 2-First connecting plate; 3-Straightening component; 31-Vertical rod; 32-Straightening plate; 4-Lifting structure; 41-Connecting component; 411-Mounting groove; 412-Second pin; 42-Lifting rope; 5-Second connecting plate; 61-Pin rod; 62-Ring; 7-First pin. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0030] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0031] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0032] Referring to Figure 1 A kind of structure schematic diagram of fishing large-caliber drill bit centralizing tool shown in the figure. A kind of fishing large-caliber drill bit centralizing tool, including connecting rod 1, first connecting plate 2, centralizing member 3 and the hoisting structure 4 of the upper end of the connecting rod 1 is fixed;

[0033] The first connecting plate 2 is perpendicular to the connecting rod 1, and is connected to the lower end of the connecting rod 1, the centralizing member 3 includes vertical rod 31 and centralizing plate 32, the upper side of the vertical rod 31 is connected with the first connecting plate 2, and the lower end of the vertical rod 31 is fixedly connected with the centralizing plate 32.

[0034] The connecting rod 1 is arranged at the middle part of the first connecting plate 2, the horizontal distance from the position where the vertical rod 31 is connected with the first connecting plate 2 to the vertical axis of the connecting rod 1 is greater than the maximum diameter of the drill bit to be righted, the centralizing plate 32 is provided with a concave arc surface on the side close to the vertical axis of the connecting rod 1, and the distance from the end away from the vertical rod 31 to the vertical axis of the connecting rod 1 gradually decreases to the position close to the vertical rod 31, so as to right the drill bit by rotating the first connecting plate 2.

[0035] The connecting rod 1 can be a Φ127mm drill rod, the first connecting plate 2 can be a thick steel plate, and the vertical rod 31 can be a thick steel bar, which is simple and low in cost. When the drill bit falls off, the hole bottom can be in a tilted state, and the drill bit needs to be righted to facilitate the next step of fishing the drill bit with a male and female taper.

[0036] According to the fishing large-diameter drill bit righting tool, when handling the drill bit falling accident, the connecting rod 1 is used to lower the fishing large-diameter drill bit righting tool to the hole bottom, the arc-shaped surface of the righting plate 32 away from the end of the vertical rod 31 contacts the drill bit, and then the drill tool is rotated to right the drill bit. The drill bit has multiple evenly distributed support points on the horizontal end for drilling, and can maintain a vertical state after being righted.

[0037] In a possible implementation, when the righting plate 32 right the drill bit, the righting plate 32 corresponds to the middle part of the drill bit;

[0038] The distance between the righting plate 32 and the first connecting plate 2 corresponds to the distance between the middle part of the drill bit and the thread for connecting the drill rod.

[0039] It should be noted that one end of the drill rod is used for drilling, and the other end is used for thread cooperation with the drill rod of the drilling machine. The middle part of the drill bit refers to the middle region between the working region for drilling and the thread region connected with the drill rod.

[0040] When the righting plate 32 right the drill bit, the righting plate 32 corresponds to the middle part of the drill bit, the first connecting plate 2 corresponds to the thread of the drill bit on the first side inclined when the drill bit falls off the drill hole, and when the tool is rotated, the righting plate 32 right the drill bit, and the first connecting plate 2 is used to limit the drill bit from tilting in the opposite direction during the righting process.

[0041] In a possible implementation, referring to Figure 2 Fig. 2 is a structural schematic diagram of another fishing large-diameter drill bit righting tool, the tool further includes a second connecting plate 5, the second connecting plate 5 is arranged on the upper side of the first connecting plate 2 and is fixedly connected with the connecting rod 1, the two ends of the first connecting plate 2 and the two ends of the second connecting plate 5 are vertically correspondingly arranged, and the two ends of the first connecting plate 2 and the two ends of the second connecting plate 5 correspond to the inner side wall of the drill hole.

[0042] Optionally, the two ends of the first connecting plate 2 are arc-shaped and correspond to the inner side wall of the drill hole, and the two ends of the second connecting plate 5 are arc-shaped and correspond to the inner side wall of the drill hole.

[0043] It should be noted that the middle part of the first connecting plate 2 and the middle part of the second connecting plate 5 are connected with the connecting rod 1, the two ends of the first connecting plate 2 can be provided as an arc corresponding to the inner side wall of the well (wherein the two ends of the first connecting plate 2 are respectively kept a predetermined gap distance from the inner side wall of the well), and the two ends of the second connecting plate 5 can also be provided as an arc corresponding to the inner side wall of the well (wherein the two ends of the second connecting plate 5 are respectively kept a predetermined gap distance from the inner side wall of the well), the first connecting plate 2 and the second connecting plate 5 cooperate to assist the connecting rod 1 to keep in the middle of the well and vertically down the well.

[0044] Optionally, the righting plate 32 is detachably connected with the first connecting plate 2, and the second connecting plate 5 is provided with a through hole corresponding to the vertical rod 31.

[0045] Optionally, the distance between the righting plate 32 and the first connecting plate 2 is adjustably arranged.

[0046] When the righting plate 32 righting the drill bit, the righting plate 32 corresponds to the middle part of the drill bit, the first connecting plate 2 corresponds to the thread of the drill bit, and the distance between the righting plate 32 and the first connecting plate 2 is adjustably arranged, which can adapt to different specifications (the distance between the middle part of the drill bit and the thread of the drill bit is different) of the drill bit.

[0047] In a possible implementation, referring to Figure 3 the connecting structure diagram of the vertical rod and the first connecting plate, the tool can further include a plug rod 61 and a ring 62 fixed to one end of the plug rod 61;

[0048] The vertical rod 31 is vertically provided with a plurality of adjusting holes corresponding to the first connecting plate 2, the diameter of the plug rod 61 corresponds to the diameter of the adjusting hole, the first connecting plate 2 is provided with a bolt through hole corresponding to the ring 62, and the rotation of the righting plate 32 is limited by passing the first bolt 7 through the ring 62 and the bolt through hole.

[0049] When the tool is rotated, the righting plate 32 is first righted, and the first connecting plate 2 limits the drill bit from tilting in the opposite direction during the righting process, and the righting plate 32 needs to cooperate with the first connecting plate 2, so that the position of the righting plate 32 relative to the first connecting plate 2 is limited by the first bolt 7 vertically passing through the ring 62 and the bolt through hole symmetrically arranged on the first connecting plate 2.

[0050] Optionally, the hoisting structure 4 includes a connecting piece 41 and a hoisting rope 42,

[0051] The middle part of the connecting piece 41 is fixedly connected with the connecting rod 1, and one mounting groove 411 for mounting the hoisting rope 42 is symmetrically arranged on each side of the connecting piece 41.

[0052] Optionally, the mounting groove 411 is horizontally arranged, and an open end of the mounting groove 411 is arranged on an end face of the connecting piece 41 near one side, and the mounting groove 411 is arranged in a length direction and penetrates the connecting piece 41.

[0053] Optionally, a vertically penetrating bolt hole 412 is arranged on the connecting piece 41 near the open end of the mounting groove 411.

[0054] After the hoisting rope 42 is mounted in the mounting groove 411, a second bolt is arranged in the vertically penetrating bolt hole 412, so as to limit the hoisting rope 42 from falling off from the mounting groove 411, thereby facilitating the mounting and improving the safety.

[0055] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tool for retrieving and straightening large-diameter drill bits, characterized in that, It includes a connecting rod, a first connecting plate, a straightening component, and a lifting structure fixed to the upper end of the connecting rod; The first connecting plate is perpendicular to the connecting rod and connected to the lower end of the connecting rod. The straightening member includes a vertical rod and a straightening plate. The upper side of the vertical rod is connected to the first connecting plate, and the lower end of the vertical rod is fixed to the straightening plate. The connecting rod is located in the middle of the first connecting plate. The horizontal distance from the position where the vertical rod connects to the first connecting plate to the vertical axis of the connecting rod is greater than the maximum diameter of the drill bit to be straightened. The straightening plate has a concave arc-shaped surface on the side near the vertical axis of the connecting rod. The distance from the end of the arc-shaped surface away from the vertical rod to the position near the vertical rod to the vertical axis of the connecting rod gradually decreases, so as to facilitate straightening the drill bit by rotating the first connecting plate.

2. The tool for retrieving and straightening large-diameter drill bits according to claim 1, characterized in that, When the straightening plate straightens the drill bit, the straightening plate corresponds to the middle of the drill bit; The distance between the straightening plate and the first connecting plate corresponds to the distance between the middle of the drill bit and the thread of the drill bit used to connect to the drill rod.

3. The tool for retrieving and straightening large-diameter drill bits according to claim 1, characterized in that, It also includes a second connecting plate, which is disposed on the upper side of the first connecting plate and fixedly connected to the connecting rod. The two ends of the first connecting plate and the two ends of the second connecting plate are vertically corresponding to each other, and the two ends of the first connecting plate and the two ends of the second connecting plate are corresponding to the inner sidewall of the well.

4. The tool for retrieving and straightening large-diameter drill bits according to claim 3, characterized in that, The two ends of the first connecting plate are arc-shaped, corresponding to the inner sidewall of the well, and the two ends of the second connecting plate are arc-shaped, corresponding to the inner sidewall of the well.

5. A tool for retrieving and straightening large-diameter drill bits according to claim 4, characterized in that, The straightening plate is detachably connected to the first connecting plate, and the second connecting plate is provided with a through hole corresponding to the vertical rod.

6. The tool for retrieving and straightening large-diameter drill bits according to claim 5, characterized in that, The distance between the straightening plate and the first connecting plate can be adjusted.

7. A tool for retrieving and straightening large-diameter drill bits according to claim 6, characterized in that, It also includes a plug rod and a ring fixed to one end of the plug rod; The vertical rod is provided with multiple adjustment holes in the vertical direction corresponding to the first connecting plate. The diameter of the insertion rod corresponds to the diameter of the adjustment hole. The first connecting plate is provided with a pin through hole corresponding to the ring. The rotation of the straightening plate is restricted by passing the first pin through the ring and the pin through hole.

8. A tool for retrieving and straightening large-diameter drill bits according to any one of claims 1-6, characterized in that, The lifting structure includes connectors and lifting ropes. The middle part of the connector is fixed to the connecting rod, and a mounting groove for mounting the lifting rope is symmetrically provided on both sides of the connector.

9. A tool for retrieving and straightening large-diameter drill bits according to claim 8, characterized in that, The mounting groove is horizontally positioned, with its open end located on the end face adjacent to the connector, and its length extends through the connector.

10. A tool for retrieving and straightening large-diameter drill bits according to claim 8, characterized in that, The connector has a vertically penetrating pin hole at the opening end near the mounting groove.

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