Efficient drill rod fisher

Abstract

The utility model discloses an efficient drill rod fisher, and particularly relates to the technical field of drill rod fishing, the efficient drill rod fisher comprises a support cylinder, the upper end of the support cylinder is fixedly connected with a mounting ring, the lower end of the support cylinder is fixedly connected with a clamping mechanism, the outer surface of the clamping mechanism is slidably connected with an extrusion assembly, and the lower end of the clamping mechanism is fixedly connected with a guide cone. The lower end of the supporting cylinder is provided with two symmetrically-distributed first inclined grooves. According to the efficient drill rod fisher, in the process of fishing the drill rod, the friction force in the drill rod can be increased through the arranged extrusion assembly, it is guaranteed that the drill rod cannot slip in the fishing process, the connection reliability between the drill rod and the fisher is improved, the overall stability is greatly improved, and the fishing success rate is effectively increased; and through the arranged clamping mechanism and the extruding assembly, the device can adapt to drill rods of different sizes, multiple fishing tools do not need to be arranged for the drill rods of different specifications, the time needed for replacing the fisher is saved, and the fishing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe retrieval technology, and in particular to a high-efficiency drill pipe retrieval device. Background Technology

[0002] In drilling operations, drill pipe, as a key component connecting the drilling rig's surface equipment and the drilling equipment or bottom hole assembly located at the bottom of the well, plays a crucial role in transmitting power, transporting drilling fluid, and performing special operations. Drill pipe must be able to withstand enormous internal and external pressure, torsion, bending, and vibration. Therefore, in the process of oil and gas extraction and refining, drill pipe can be reused multiple times. During drilling, due to prolonged exposure to enormous internal and external pressure, torsion, bending, and vibration, as well as the influence of various factors such as geological conditions, drilling depth, and drilling fluid properties, drill pipe is prone to falling or breaking. Once drill pipe falls, it not only forces the interruption of drilling operations, severely affecting the construction progress, but may also cause huge economic losses and even safety accidents. Traditional retrieval methods often require a great deal of time and effort, especially in deep wells or complex geological conditions, where retrieval operations are even more difficult. Therefore, a highly efficient drill pipe retrieval tool is needed. Utility Model Content

[0003] The main purpose of this invention is to provide a high-efficiency drill pipe retrieval device that can effectively solve the retrieval problem.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A high-efficiency drill pipe retrieval device includes a support cylinder, an installation ring fixedly connected to the upper end of the support cylinder, a clamping mechanism fixedly connected to the lower end of the support cylinder, a compression component slidably connected to the outer surface of the clamping mechanism, a guide cone fixedly connected to the lower end of the clamping mechanism, and two symmetrically distributed inclined grooves formed at the lower end of the support cylinder.

[0006] Preferably, the extrusion assembly includes a clamping cylinder, which is slidably connected to the outer surface of the clamping mechanism. The upper end of the clamping cylinder has two symmetrically distributed inclined grooves II. The upper part of the inner arc surface of the clamping cylinder has symmetrically distributed sliding grooves I on the side away from the axis of the clamping cylinder. The inner cavities of the two sliding grooves I are slidably connected to support blocks. The outer surface of the clamping cylinder has several elongated holes distributed at intervals. The outer surface of the clamping cylinder has annular patterns fixedly connected to it. The inner arc surface of the clamping cylinder has two symmetrically distributed grooves on the side away from its axis.

[0007] Preferably, both of the two inclined grooves are engaged with the two inclined grooves one opened at the lower end of the support cylinder.

[0008] Preferably, the clamping mechanism includes a fixed tube and a connecting rod assembly. The fixed tube is fixedly connected to the lower side of the inner arc surface of the support cylinder. Two sliding grooves are symmetrically opened on the upper part of the outer surface of the fixed tube. A partition is fixedly connected to the upper part of the inner cavity of the fixed tube. A motor is fixedly connected to the middle part of the upper part of the partition. The connecting rod assembly is fixedly connected to the middle part of the inner cavity of the fixed tube. Two through holes are symmetrically opened on the middle part of the outer surface of the fixed tube. An inclined plate is slidably connected to the inner cavity of each of the two through holes.

[0009] Preferably, the ends of the two support blocks that are close to each other are slidably connected to the inner cavities of the two sliding grooves on the same side, and the outer surfaces of the two inclined plates correspond to the grooves on the same side.

[0010] Preferably, the connecting rod assembly includes a threaded rod II and several fixed blocks. The threaded rod II is rotatably connected to the middle of the lower end of the partition plate. A sliding block is threadedly connected to the outer surface of the threaded rod II. Several rotating rods are rotatably connected to the left and right sides of the outer surface of the sliding block in a rectangular arrangement. The several fixed blocks are fixedly connected to the ends of two inclined plates that are close to each other in a rectangular arrangement. The ends of the rotating rods on the left side and the rotating rods on the right side that are far apart from each other are rotatably connected to the inside of the fixed blocks on the same side.

[0011] Preferably, the motor output end passes through the upper end of the partition plate and is fixedly connected to the upper end of the threaded rod two via a coupling.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In use, the extrusion component of this utility model increases the friction inside the drill rod during the retrieval process, ensuring that the drill rod will not easily slip off during retrieval. This increases the reliability of the connection between the drill rod and the retrieval device, greatly improves the overall stability, and effectively increases the retrieval success rate.

[0014] 2. During use, the clamping mechanism and extrusion assembly of this utility model can adapt to drill rods of different sizes, eliminating the need to equip drill rods of different specifications with multiple retrieval tools and frequent replacements, thereby saving time required to replace retrieval tools and improving retrieval efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the extrusion assembly of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the clamping mechanism of this utility model;

[0018] Figure 4For the present utility model Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the overall structure of this utility model from another perspective.

[0020] In the diagram: 1. Support cylinder; 2. Mounting ring; 3. Extrusion assembly; 31. Clamping sleeve; 32. Annular pattern; 33. Long hole; 34. Inclined groove II; 35. Groove; 36. Slide groove I; 37. Support block; 4. Clamping mechanism; 41. Fixing tube; 42. Through hole; 43. Inclined plate; 44. Slide groove II; 45. Partition plate; 46. Motor; 47. Connecting rod assembly; 471. Threaded rod II; 472. Sliding block; 473. Fixing block; 474. Rotating rod; 5. Guide cone. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 As shown, a high-efficiency drill pipe retrieval device includes a support cylinder 1, an installation ring 2 fixedly connected to the upper end of the support cylinder 1, a clamping mechanism 4 fixedly connected to the lower end of the support cylinder 1, a compression component 3 slidably connected to the outer surface of the clamping mechanism 4, a guide cone 5 fixedly connected to the lower end of the clamping mechanism 4, and two symmetrically distributed inclined grooves 1 opened at the lower end of the support cylinder 1.

[0023] In the specific implementation process of this utility model, the entire device is first installed on the drilling equipment by the installation ring 2. Then, the drilling equipment drives the entire device into the hole at the break of the drill rod. Then, the extrusion component 3 is pushed into the interior of the drill rod by the action of the guide cone 5. Then, the internal drive structure of the clamping mechanism 4 is activated. The internal structure of the extrusion component 3 expands by the action of the clamping mechanism 4, so that the surface of the extrusion component 3 is tightly attached to the surface of the drill rod. Then, the support cylinder 1 is lifted upward by the drilling equipment. The internal structure of the clamping mechanism 4 and the internal structure of the extrusion component 3 are mutually engaged, thereby lifting the drill rod that is tightly attached to the surface of the extrusion component 3.

[0024] Furthermore, in order to achieve a close fit with the inside of the drill pipe, refer to Figure 2In this solution, the extrusion assembly 3 includes a clamping cylinder 31, which is slidably connected to the outer surface of the clamping mechanism 4. The upper end of the clamping cylinder 31 has two symmetrically distributed inclined grooves 34. The upper part of the inner arc surface of the clamping cylinder 31 is symmetrically provided with a sliding groove 36 on the side away from the axis of the clamping cylinder 31. The inner cavities of the two sliding grooves 36 are slidably connected with support blocks 37. The outer surface of the clamping cylinder 31 has several elongated holes 33 distributed at intervals. The outer surface of the clamping cylinder 31 is fixedly connected with annular patterns 32. The inner arc surface of the clamping cylinder 31 is symmetrically provided with two grooves 35 on the side away from its axis.

[0025] Furthermore, both of the two inclined grooves 34 are engaged with the two inclined grooves 1 opened at the lower end of the support cylinder 1.

[0026] In the above process, as the support cylinder 1 moves downward, the chuck 31 is driven into the drill pipe. The annular groove 32 on the surface of the chuck 31 increases the friction with the inside of the drill pipe. When the annular groove 32 fits into the inside of the drill pipe, the support block 37 causes the inclined groove 34 to engage with the inclined groove 1 at the lower end of the support cylinder 1. This allows the groove 35 to correspond with the internal structure of the clamping mechanism 4. Then, the clamping mechanism 4 causes the chuck 31 to fit more tightly into the inside of the drill pipe, preventing it from falling off during the lifting process.

[0027] Specifically, in order to achieve a tighter fit between the chuck 31 and the drill pipe, refer to Figure 3 In this solution, the clamping mechanism 4 includes a fixed tube 41 and a connecting rod assembly 47. The fixed tube 41 is fixedly connected to the lower side of the inner arc surface of the support cylinder 1. Two sliding grooves 44 are symmetrically opened on the upper part of the outer surface of the fixed tube 41. A partition plate 45 is fixedly connected to the upper part of the inner cavity of the fixed tube 41. A motor 46 is fixedly connected to the middle part of the upper end of the partition plate 45. The connecting rod assembly 47 is fixedly connected to the middle part of the inner cavity of the fixed tube 41. Two through holes 42 are symmetrically opened on the middle part of the outer surface of the fixed tube 41. An inclined plate 43 is slidably connected to the inner cavity of each of the two through holes 42.

[0028] Furthermore, the two support blocks 37 are slidably connected to the inner cavities of the two sliding grooves 44 on the same side at their respective close ends, and the outer surfaces of the two inclined plates 43 correspond to the grooves 35 on the same side.

[0029] In the above process, the inclined groove 2 34 engages with the inclined groove 1, and then the motor 46 is started. The motor 46 drives the internal structure of the connecting rod assembly 47 to run, so that the connecting rod assembly 47 drives the two inclined plates 43 to move away from each other in the inner cavity of the two through holes 42, so that the two inclined plates 43 engage with the two grooves 35 on the same side. Then, while lifting the chuck 31, the inclined plates 43 press against the surface of the grooves 35, so that the outer surface of the chuck 31 is slightly deformed outward under the action of the elongated hole 33, so that the annular pattern 32 fits more tightly with the inside of the drill rod, so that it will not fall off during the lifting process.

[0030] The specific installation method, circuit connection method, and control method of the motor 46 used above are all conventional designs, and will not be described in detail in this utility model.

[0031] Specifically, in order to achieve the purpose of engaging the inclined plate 43 with the groove 35, refer to Figure 4 In this scheme, the connecting rod assembly 47 includes a threaded rod 471 and several fixed blocks 473. The threaded rod 471 is rotatably connected to the middle of the lower end of the partition plate 45. A sliding block 472 is threadedly connected to the outer surface of the threaded rod 471. Several rotating rods 474 are rotatably connected to the left and right sides of the outer surface of the sliding block 472 in a rectangular arrangement. Several fixed blocks 473 are fixedly connected to the ends of two inclined plates 43 that are close to each other in a rectangular arrangement. The ends of several rotating rods 474 on the left side and several rotating rods 474 on the right side that are far apart from each other are rotatably connected to the inside of the fixed blocks 473 on the same side.

[0032] Furthermore, the output end of the motor 46 passes through the upper end of the partition 45 and is fixedly connected to the upper end of the threaded rod 471 via a coupling.

[0033] In the above process, the motor 46 drives the threaded rod 471 to rotate, which in turn drives the sliding block 472 to rise. As the sliding block 472 rises, it drives the rotating rod 474 to rotate in the horizontal direction, which in turn pushes the two inclined plates 43 to move towards the groove 35. This causes the inclined plates 43 to engage with the inner surface of the groove 35, and as they rise, they compress the groove 35, causing the surface of the clamping cylinder 31 to deform outward, thus achieving a tight fit.

[0034] It should be noted that the specific installation method of the motor 46, the circuit connection method, and the control method used in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0035] The working principle of this utility model is as follows: First, the entire device is installed on the drilling equipment through the mounting ring 2. Then, the drilling equipment drives the entire device into the hole at the break of the drill rod. Then, the extrusion component 3 is pushed into the interior of the drill rod by the action of the guide cone 5. Then, the internal drive structure of the clamping mechanism 4 is activated. The internal structure of the extrusion component 3 expands through the action of the clamping mechanism 4, so that the surface of the extrusion component 3 is tightly attached to the surface of the drill rod. Then, the support cylinder 1 is lifted upward by the drilling equipment. The internal structure of the clamping mechanism 4 and the internal structure of the extrusion component 3 are mutually engaged, thereby lifting the drill rod that is tightly attached to the surface of the extrusion component 3.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high efficiency drill pipe fisher comprising a support cylinder (1) characterised in that: The support cylinder (1) upper end is fixedly connected with the mounting ring (2), the support cylinder (1) lower end is fixedly connected with the clamping mechanism (4), the clamping mechanism (4) outer surface is slidably connected with the extrusion assembly (3), the clamping mechanism (4) lower end is fixedly connected with the guide cone (5), the support cylinder (1) lower end is provided with two symmetrically distributed inclined grooves one.

2. A high efficiency drill pipe fisher as claimed in claim 1, wherein: The extrusion assembly (3) includes a clamping cylinder (31), the clamping cylinder (31) is slidably connected to the outer surface of the clamping mechanism (4), the clamping cylinder (31) upper end is provided with two symmetrically distributed inclined grooves two (34), the clamping cylinder (31) inner arc surface upper part is symmetrically provided with a sliding groove one (36) on the side away from the clamping cylinder (31) axis, the sliding groove one (36) inner cavity is slidably connected with a support block (37), the clamping cylinder (31) outer surface is provided with a plurality of long holes (33) at intervals, the clamping cylinder (31) outer surface is fixedly connected with an annular pattern (32), the clamping cylinder (31) inner arc surface is symmetrically provided with two recesses (35) on the side away from its axis.

3. A high efficiency drill pipe fisher as claimed in claim 2, wherein: The two inclined grooves two (34) are clamped with the two inclined grooves one provided in the support cylinder (1) lower end.

4. A high efficiency drill pipe fisher as claimed in claim 3, wherein: The clamping mechanism (4) includes a fixed tube (41) and a connecting rod assembly (47), the fixed tube (41) is fixedly connected to the inner arc surface lower side of the support cylinder (1), the fixed tube (41) outer surface upper part is symmetrically provided with two sliding grooves two (44), the fixed tube (41) inner cavity upper part is fixedly connected with a partition plate (45), the partition plate (45) upper end middle part is fixedly connected with a motor (46), the connecting rod assembly (47) is fixedly connected to the fixed tube (41) inner cavity middle part, the fixed tube (41) outer surface middle part is symmetrically provided with two through holes (42), the through hole (42) inner cavity is slidably connected with an inclined block plate (43).

5. A high efficiency drill pipe fisher as claimed in claim 4, wherein: The two support blocks (37) are slidably connected to the inner cavities of the two sliding grooves two (44) on the same side, respectively, and the outer surfaces of the two inclined block plates (43) correspond to the same side recesses (35).

6. A high efficiency drill pipe fisher as defined in claim 4, wherein: The connecting rod assembly (47) includes a second threaded rod (471) and a plurality of fixed blocks (473), the second threaded rod (471) is rotatably connected to the partition plate (45) lower end middle part, the second threaded rod (471) outer surface is threadedly connected with a sliding block (472), the sliding block (472) outer surface left side and right side are rotatably connected with a plurality of rotating rods (474) distributed in a rectangular shape, a plurality of the fixed blocks (473) are fixedly connected to the ends of the two inclined block plates (43) close to each other, and the ends of the plurality of rotating rods (474) on the left side and the plurality of rotating rods (474) on the right side away from each other are rotatably connected to the inside of the same side fixed block (473), respectively.

7. A high efficiency drill pipe fisher according to claim 6, wherein: The motor (46) output end penetrates the partition plate (45) upper end and is fixedly connected to the second threaded rod (471) upper end through a shaft coupling.

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