Drill bit fishing equipment
By designing a drill bit salvage equipment with open salvage parts and water pressure control, the problem of difficult damage to drill bit slipping and breaking the drill bit in mud is solved, and the drill bit is easily salvage and protection of drill bits is achieved.
Patent Information
- Application Number
- CN202421582958.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-05
AI Technical Summary
In the prior art, drill bits are prone to slip in drill holes with more mud, resulting in unconnection. The method of crushing drill bits is difficult to destroy the hard drill bits, and cannot provide sufficient support reaction force in the soft formation, which can easily lead to enlargement of the hole diameter and accidents.
A drill bit salvage equipment is designed, including a salvage body connected to a water pressure salvage rod. The other end of the salvage body is rotatably connected with a plurality of open salvage parts, and an interconnected piston rod and a piston head are arranged inside. The piston rod sleeve is equipped with a spring, and the opening and closing of the open salvage parts are controlled by the water pressure to achieve fixed connection and salvage of the drill bit.
This equipment makes the salvage process of the drill bit easier, avoids the risk of the drill bit rotating with the salvage tube, protects the drill hole from damage, and avoids the expansion of the hole size and other accidents.
Smart Images
Figure CN222991484U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geological exploration, and particularly relates to a bit fishing device. Background Art
[0002] In the work of drilling or well drilling, due to various complex factors in geological conditions, accidents of bits and drill pipes often occur. If the fishing tool used cannot fish up the bit and drill pipe, it may cause accidents in which the bit, drill pipe and wellbore are scrapped together.
[0003] For the bit that is tripped or left in the hole for other reasons, in the prior art, generally a fishing pipe is connected with a conical threaded head at the upper end, and the threaded head can enter into the bit sub. During fishing, the fishing pipe is rotated by a drilling rig, and the threaded head and the bit sub are tightened, so that the dropped bit can be extracted. However, for a borehole with a lot of mud, the bit is likely to rotate with the fishing pipe during connection, resulting in the consequence of inability to connect. In the prior art, there is also a method of treating the bit by crushing it. However, the bit is very hard and difficult to crush. Even if it is forcibly crushed, it will seriously delay the construction period. If it encounters a soft formation and cannot provide a support reaction force, during the crushing process, the bit will keep moving forward, causing the borehole diameter to expand and easily causing other accidents.
[0004] Therefore, the prior art needs to be improved. Summary of the Utility Model
[0005] The technical problem to be solved by the utility model is that the rotary connection of the bit in the prior art is prone to slipping, and crushing the bit is likely to damage the borehole. The purpose is to provide a bit fishing device, which adopts corresponding technical means and has the beneficial effects of being easy to fish the bit and protecting the borehole.
[0006] The utility model is realized by the following technical solutions:
[0007] A bit fishing device, which includes a fishing main body connected to a hydraulic fishing rod at one end, and a plurality of spreading fishing members are rotatably connected to the other end of the fishing main body. A piston rod and a piston head which are connected to each other are arranged inside the fishing main body. A spring is sleeved on the piston rod. One side of the piston head is set as a first end face for bearing the hydraulic pressure thrust, and the other side of the piston head is set as a second end face for bearing the spring thrust. The spreading fishing member is provided with an inclined surface which is pushed and spread by the end of the piston rod far away from the piston head.
[0008] In the above technical solution, the drill bit fishing device is connected to the hydraulic pressure fishing rod, and the hydraulic pressure fishing rod is connected to the top of the fishing main body. When it is not necessary to connect to the drill bit, the hydraulic pressure fishing rod does not provide hydraulic pressure, and the spring pushes the piston rod and the piston head upward, and the two spreading fishing parts are in a retracted state. The hydraulic pressure fishing rod and the drill bit fishing device move in the drill hole to near the drill bit, and the retracted spreading fishing parts are inserted into the top connection port of the drill bit. Then the hydraulic pressure fishing rod provides hydraulic pressure, and the thrust of the hydraulic pressure is greater than the thrust of the spring. The hydraulic pressure pushes the piston head and the piston rod downward, and the lower end of the piston rod supports the inclined surface, thereby pushing the spreading fishing parts to rotate outward. After the spreading fishing parts are spread, they are pressed against the inner wall of the drill bit, and retracting the hydraulic pressure fishing rod and the drill bit fishing device can fish up the drill bit.
[0009] Further, in the present utility model, sawteeth for enhancing connection are provided on the outer wall of the above-mentioned spreading fishing part.
[0010] Further, in the present utility model, a first chamber and a second chamber that communicate with each other are provided in the above-mentioned fishing main body. The piston rod moves along the first chamber, the piston head moves along the second chamber, and the second chamber communicates with the hydraulic pressure fishing rod.
[0011] Further, in the present utility model, a sealing ring that abuts against the inner wall of the second chamber is provided on the above-mentioned piston head.
[0012] Further, in the present utility model, the end of the above-mentioned piston rod is rounded.
[0013] Further, in the present utility model, the above-mentioned spreading fishing parts are symmetrically distributed around the center of the piston rod or evenly distributed around.
[0014] Further, in the present utility model, the above-mentioned spreading fishing parts are combined to form a conical head.
[0015] Further, in the present utility model, a one-way valve is provided in the above-mentioned piston head.
[0016] Further, in the present utility model, the above-mentioned inclined surface is configured as a curved surface or a flat surface.
[0017] Further, in the present utility model, the above-mentioned fishing main body is threadedly connected to the hydraulic pressure fishing rod.
[0018] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0019] 1. Easy connection: The opening and closing of the fishing part is controlled by water pressure. When no water pressure is provided, the fishing part is in a closed state, occupying a small volume and being easily inserted into the drill bit. After water pressure is provided, the fishing part is in an open state, and the fishing part presses against the inner wall of the drill bit to achieve a fixed connection with the drill bit. Compared with the existing rotational connection method, the drill bit fishing device of the present utility model is easier to connect.
[0020] 2. Protect the drilling hole: The drill bit fishing device of the present utility model does not need to damage the drill bit. After connecting to the drill bit, it can take the drill bit out from the drilling hole. The working range during the fishing process does not exceed the aperture of the drilling hole, providing a good protection effect for the drilling hole. It avoids the expansion of the aperture and causes other accidents. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:
[0022] Figure 1 is a schematic internal structure diagram (when opened) of a drill bit fishing device of the present utility model;
[0023] Figure 2 is a schematic internal structure diagram (when not opened) of a drill bit fishing device of the present utility model;
[0024] Figure 3 is Figure 2 an enlarged schematic diagram of part A in
[0025] Reference numerals in the drawings and corresponding component names: 1 - fishing main body, 101 - first chamber, 102 - second chamber, 2 - fishing part, 201 - inclined surface, 202 - saw teeth, 3 - piston rod, 4 - piston head, 5 - spring, 6 - sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not constitute a limitation to the present utility model.
[0027] The following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance. In the description of the embodiments of the present utility model, "a plurality of" represents at least two.
[0029] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected", "connected" appear, they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0030] Embodiment
[0031] This embodiment provides a drill bit fishing device, as Figures 1 - 3 shown, and the specific structure is described as follows.
[0032] Please refer to Figure 1 shown. The drill bit fishing device of this embodiment mainly consists of a fishing main body 1, a piston rod 3, a piston head 4, a spreading fishing piece 2, and a spring 5. The fishing main body 1 serves as the housing for fishing the drill bit in the borehole, provides an installation position for other components, and also plays a certain protective role for other components.
[0033] Furthermore, as Figure 1 shown, the fishing main body 1 is in the shape of a cylinder made of stainless steel. A first chamber 101 and a second chamber 102 that communicate with each other are provided inside the fishing main body 1. The diameter of the first chamber 101 is smaller than that of the second chamber 102. The first chamber 101 is located below the second chamber 102. The second chamber 102 penetrates the top end of the fishing main body 1. Internal threads are provided on the inner wall of the second chamber 102 near the top end, which is convenient for fixing with the hydraulic fishing rod through threaded connection. After connection, the second chamber 102 communicates with the hydraulic fishing rod.
[0034] In some embodiments of this embodiment, in combination with Figure 1 and Figure 2 shown, both the piston rod 3 and the piston head 4 are cylinders, and the piston head 4 is fixedly installed at the top of the piston rod 3. The piston rod 3 is installed in the first chamber 101 and can move up and down along the first chamber 101. The piston head 4 is installed in the second chamber 102 and can move up and down along the second chamber 102.
[0035] Further, three sealing rings 6 are sleeved on the side wall of the piston head 4, and the sealing rings 6 are abutted against the inner wall of the piston head 4 and the second chamber 102. The sealing rings 6 play a sealing role to ensure that the water pressure acts on the piston head 4.
[0036] Furthermore, the spring 5 is sleeved on the piston rod 3. The top end of the spring 5 abuts against the bottom surface of the piston rod 3, and the bottom end of the spring 5 abuts against the step surface at the connecting part of the first chamber 101 and the second chamber 102. The top end surface of the piston head 4 is the first end surface for bearing the water pressure thrust, and the bottom end surface of the piston head 4 is set as the second end surface for bearing the thrust of the spring 5.
[0037] In some embodiments of the present embodiment, in combination with Figure 1 and Figure 2 as shown, two spreading and fishing parts 2 are provided (three or four can be provided in other embodiments). The two spreading and fishing parts 2 are in the shape of pliers. The spreading and fishing parts 2 are combined to form a conical head with a sharp bottom and a thick top, which is convenient for the spreading and fishing parts 2 to advance in the drill hole. The tip of the spreading and fishing part 2 faces downward. The curved surface of the spreading and fishing part 2 is located on the outside, and the straight surface of the spreading and fishing part 2 is located on the inside. The top end of the spreading and fishing part 2 and the fishing main body 1 are rotationally connected by a rivet, and the spreading and fishing part 2 can rotate around the connected rivet.
[0038] It should be noted that in order to realize the automatic closing of the spreading and fishing part 2, a torsion spring can be installed on the rivet. The torsion spring is connected to the spreading and fishing part 2, and the torsion spring has a tendency to drive the spreading and fishing part 2 to rotate inward.
[0039] Further, in combination with Figure 1 and Figure 2 as shown, the upper right corner of the left spreading and fishing part 2 is set as an inclined surface 201, and the upper left corner of the right spreading and fishing part 2 is set as an inclined surface 201. The piston rod 3 is located at the center of the two spreading and fishing parts 2. The two inclined surfaces 201 or the spreading and fishing parts 2 are symmetrical with respect to the piston rod 3. If there are three or four spreading and fishing parts 2, they are evenly distributed around the piston rod 3 to evenly connect all directions of the drill bit.
[0040] After the piston rod 3 moves downward, the bottom edge of the piston rod 3 abuts against the inclined surface 201. When the piston rod 3 continues to move downward, it pushes the spreading and fishing part 2 to rotate outward, realizing the spreading of the two spreading and fishing parts 2. When the spreading and fishing part 2 is located inside the drill bit, after the spreading and fishing part 2 spreads, it can abut against the inner wall of the drill bit to realize fixed connection.
[0041] And in order to better connect the drill bit, in combination with Figure 1 and Figure 3 as shown, a plurality of sawteeth 202 are provided on the outer wall of the spreading and fishing part 2, and the sawteeth 202 abut against the inside of the drill bit to make the connection more firm.
[0042] It should be noted that the lower end of the piston rod 3 can be set as a spherical end or a rounded edge to avoid damaging the inclined surface 201. The inclined surface 201 can be a curved surface (such as Figure 1 shown) or a flat surface.
[0043] In some embodiments of this embodiment, the piston head 4 and the piston rod 3 are provided with holes vertically passing through, and a one-way valve is arranged in the holes. After the one-way valve is closed, it plays a role in blocking water, so that the water pressure in the pipe rises and the water pressure acts on the piston head 4 to compress the spring 5, causing the piston rod 3 to move downward. After the fishing operation is completed, the one-way valve opens to release the water pressure, and the piston head 4 automatically resets, and the fishing member 2 is opened to facilitate the removal of the drill bit.
[0044] The working principle of the drill bit fishing device of the present utility model is as follows:
[0045] The drill bit fishing device is connected to the water pressure fishing rod, and the water pressure fishing rod is connected to the top of the fishing main body 1. When it is not necessary to connect to the drill bit, the water pressure fishing rod does not provide water pressure, and the spring 5 pushes the piston rod 3 and the piston head 4 upward, and the two fishing members 2 in the unfolded state are in a retracted state. The water pressure fishing rod and the drill bit fishing device move in the drill hole to near the drill bit, and the retracted fishing members 2 are inserted into the top connection port of the drill bit. Then the water pressure fishing rod provides water pressure, and the thrust of the water pressure is greater than the thrust of the spring 5. The water pressure pushes the piston head 4 and the piston rod 3 downward, and the lower end of the piston rod 3 abuts against the inclined surface 201, and then pushes the fishing member 2 to rotate outward to realize unfolding. After the fishing member 2 is unfolded, it abuts against the inner wall of the drill bit, and retracting the water pressure fishing rod and the drill bit fishing device can fish up the drill bit.
[0046] The utility model provides a drill bit fishing device, which comprises a fishing main body 1 with one end connected to a hydraulic pressure fishing rod. A plurality of expanding fishing parts 2 are rotatably connected to the other end of the fishing main body 1. A piston rod 3 and a piston head 4 which are connected to each other are arranged inside the fishing main body 1. A spring 5 is sleeved on the piston rod 3. One side of the piston head 4 is set as a first end face for bearing the hydraulic pressure thrust, and the other side of the piston head 4 is set as a second end face for bearing the thrust of the spring 5. The expanding fishing part 2 is provided with an inclined surface 201 which is pushed and expanded by the end of the piston rod 3 far away from the piston head 4. A sawtooth 202 for enhancing connection is arranged on the outer wall of the expanding fishing part 2. A first chamber 101 and a second chamber 102 which are communicated with each other are arranged inside the fishing main body 1. The piston rod 3 moves along the first chamber 101, and the piston head 4 moves along the second chamber 102. The second chamber 102 is communicated with the hydraulic pressure fishing rod. A sealing ring 6 which abuts against the inner wall of the second chamber 102 is arranged on the piston head 4. The end of the piston rod 3 is rounded. The expanding fishing parts 2 are symmetrically distributed around the center of the piston rod 3 or evenly distributed around it. The expanding fishing parts 2 are combined to form a conical head. A one-way valve is arranged inside the piston head 4. The inclined surface 201 is configured as a curved surface or a plane. The fishing main body 1 is threadedly connected to the hydraulic pressure fishing rod. Therefore, the drill bit fishing device provided by the utility model has the beneficial effects of being easy to fish the drill bit and protecting the drill hole.
[0047] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A drill bit salvage device, characterized in that: The invention comprises a salvage body (1) having one end connected to a hydraulic salvage rod, the other end of the salvage body (1) being rotatably connected to a plurality of expanded salvage pieces (2), the interior of the salvage body (1) being provided with a piston rod (3) and a piston head (4) which are connected to each other, the piston rod (3) being sleeved with a spring (5), one side of the piston head (4) being provided with a first end face for bearing the thrust of the hydraulic pressure, the other side of the piston head (4) being provided with a second end face for bearing the thrust of the spring (5), and the expanded salvage piece (2) being provided with an inclined surface (201) which is pushed and expanded by the end of the piston rod (3) away from the piston head (4).
2. The drill bit salvage equipment according to claim 1, characterized in that: The outer wall of the expanded salvage piece (2) is provided with saw teeth (202) for enhancing connection.
3. The drill bit salvage equipment according to claim 1, characterized in that: The salvage body (1) is provided with a first chamber (101) and a second chamber (102) which are interconnected, the piston rod (3) moves along the first chamber (101), the piston head (4) moves along the second chamber (102), and the second chamber (102) is connected to the water pressure salvage rod.
4. The drill bit salvage equipment according to claim 3, characterized in that: The piston head (4) is provided with a sealing ring (6) abutting against the inner wall of the second chamber (102).
5. The drill bit salvage equipment according to claim 1, characterized in that: The end of the piston rod (3) is rounded.
6. The drill bit salvage equipment according to claim 1, characterized in that: The plurality of expanded salvaging pieces (2) are symmetrically distributed around the center of the piston rod (3) or evenly distributed around the center.
7. The drill bit salvage equipment according to claim 1, characterized in that: The expanded salvaging pieces (2) are combined to form a conical head.
8. The drill bit salvage equipment according to claim 1, characterized in that: A one-way valve is arranged inside the piston head (4).
9. The drill bit salvage equipment according to claim 1, characterized in that: The inclined surface (201) is configured as a curved surface or a flat surface.
10. The drill bit salvaging equipment according to claim 1, characterized in that: The salvage body (1) is threadedly connected to the hydraulic salvage rod.