A lifting tool for lifting drill collars

Abstract

This utility model relates to the field of hoisting auxiliary technology, and in particular to a hoisting tool for lifting drill collars. It includes a lifting handle section, an inclined side section, a bottom section, and a connecting elbow. The top ends of the lifting handle section and the inclined side section are integrally formed. The bottom end of the inclined side section is connected to one end of the bottom section via the connecting elbow. Both the connecting elbow and the inclined side section and the bottom section are threaded. Two symmetrically arranged locking mechanisms are provided at the threaded connections between the bottom end of the inclined side section and one end of the bottom section and the connecting elbow. This utility model provides a hoisting tool that is easy to disassemble and allows for the replacement of bottom sections of different specifications, thereby improving the tool's applicability and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hoisting auxiliary technology, and in particular to a hoisting tool for lifting drill collars. Background Technology

[0002] The drill collar lifting sub is a commonly used hoisting auxiliary device in oil drilling, mining, and other fields, primarily used for hoisting heavy tubular materials such as drill collars. This type of tool typically consists of a lifting handle, a beveled edge, and a bottom tube section, achieving stable material hoisting and safe protection through a specific structural design. In practical use, due to the varying lengths of the materials being hoisted, the tool must possess a certain degree of adaptability and flexibility to meet the needs of different working conditions.

[0003] Currently, most common short-section lifting tools adopt an integral welded or fixed structure, with a non-detachable connection between the bottom pipe section and the beveled pipe section. While this structure possesses a certain strength, it presents the following problems in practical use: First, the tool size cannot be flexibly adjusted according to the length of the material being lifted, resulting in a tool that is only suitable for materials of a specific length, leading to poor versatility; second, the integral structure occupies a large space during transportation and storage, making handling inconvenient; and third, when the tool is partially damaged, the entire tool must be replaced, resulting in high maintenance costs. Utility Model Content

[0004] This utility model provides a lifting section tool that is easy to disassemble and can replace bottom pipe sections of different specifications, thereby improving the tool's applicability and efficiency.

[0005] The technical solution adopted by this utility model is as follows: a tool for lifting drill collars and raising short sections, including a lifting handle section, an inclined side section, a bottom section, and a connecting elbow. The top of the lifting handle section and the inclined side section are integrally formed. The bottom end of the inclined side section is connected to one end of the bottom section through the connecting elbow. The connecting elbow is threaded to both the inclined side section and the bottom section. Two symmetrically arranged locking mechanisms are provided at the threaded connection points between the bottom end of the inclined side section and one end of the bottom section and the connecting elbow.

[0006] As a further improvement of this utility model, the lifting handle section is vertically arranged and has a lifting ring at the top for connecting the lifting equipment.

[0007] As a further improvement of this utility model, one end of the bottom pipe section is provided with a protrusion to prevent slippage during hoisting.

[0008] As a further improvement of this utility model, the bottom end of the inclined pipe section and one end of the bottom pipe section are both provided with external threads, and the inner surfaces of both ends of the connecting elbow are both provided with internal threads that are compatible with the external threads.

[0009] As a further improvement of this utility model, the locking mechanism includes a fixing groove provided on both sides of the inclined pipe section or the bottom pipe section, a spring installed in the fixing groove, one end of the spring being connected to a limiting block that passes through the side wall of the connecting elbow, and both ends of the connecting elbow being provided with limiting holes that cooperate with the limiting blocks.

[0010] As a further improvement of this utility model, sliders are fixedly connected to both sides of the limiting block, and sliding grooves for the sliders to slide are provided on both sides of the fixing groove.

[0011] As a further improvement of this utility model, the angle of the connecting elbow is 45-90 degrees, and the angle between the hanging handle section and the inclined side section is 90-135 degrees.

[0012] As a further improvement of this utility model, the diameter of the hanging handle section, the inclined side section, and the bottom section are all 4-6cm.

[0013] The beneficial effects of this utility model are as follows: By adopting a detachable structure combining connecting elbows and threaded connections, and setting up symmetrical locking mechanisms, this utility model enables quick and reliable assembly, disassembly, and replacement of the bottom pipe section and the inclined pipe section. This not only allows the tool to flexibly adapt to materials of different lengths, greatly improving its versatility and efficiency, but also facilitates transportation and storage. Furthermore, in the event of partial damage, individual parts can be replaced, effectively reducing maintenance costs. At the same time, the overall structure is simple, easy to operate, and has a firm connection, ensuring the safety and reliability of the hoisting process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a hoisting and lifting tool for drill collars according to this utility model;

[0015] Figure 2 This is an exploded structural diagram of a hoisting tool for lifting drill collars according to this utility model;

[0016] Figure 3 This is a partial cross-sectional view of a hoisting tool for lifting drill collars according to this utility model. Figure 1 ;

[0017] Figure 4 This is a partial cross-sectional view of a hoisting tool for lifting drill collars according to this utility model. Figure 2 .

[0018] As shown in the figure: 1. Hanging handle section; 2. Inclined side section; 3. Bottom section; 4. Connecting elbow; 5. Locking mechanism; 501. Fixing groove; 502. Spring; 503. Limiting block; 504. Limiting hole; 505. Sliding block; 506. Slide groove; 6. Hanging ring; 7. Protrusion. Detailed Implementation

[0019] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0020] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] This utility model provides the following: Figure 1-4 The tool shown includes a lifting section for hoisting drill collars, comprising a lifting handle section 1, a beveled section 2, a bottom section 3, and a connecting elbow 4. The top ends of the lifting handle section 1 and the beveled section 2 are integrally formed. The bottom end of the beveled section 2 is connected to one end of the bottom section 3 via the connecting elbow 4. The connecting elbow 4 is threaded to both the beveled section 2 and the bottom section 3. Two symmetrically arranged locking mechanisms 5 are provided at the threaded connection points between the bottom end of the beveled section 2 and one end of the bottom section 3 and the connecting elbow 4.

[0023] like Figure 1 and Figure 2 As shown, in this utility model, the lifting handle section 1 is vertically arranged and has a lifting ring 6 at the top for connecting the lifting equipment. The lifting ring 6 is forged from high-strength alloy steel. The lifting ring 6 is connected to the top of the lifting handle section 1 by full welding. The weld is tested by non-destructive testing to ensure that there are no welding defects, so as to withstand the huge tensile force during the lifting operation. One end of the bottom section 3 is provided with a protrusion 7 to prevent it from slipping during the lifting process. The protrusion 7 is integrally formed with the bottom section 3 and is made by forging process. It can effectively increase the friction with the inner wall of the drill collar and prevent the drill collar from slipping due to shaking or tilting during the lifting process.

[0024] like Figure 2 As shown, in this utility model, the bottom end of the inclined pipe section 2 and the outer surface of one end of the bottom pipe section 3 are provided with external threads, and the inner surfaces of both ends of the connecting elbow 4 are provided with internal threads that are compatible with the external threads. The length of the internal thread 9 matches the length of the external threads of the inclined pipe section 2 and the bottom pipe section 3, ensuring that the thread engagement length after connection is not less than 4cm, so as to guarantee the connection strength.

[0025] like Figure 3 and Figure 4 As shown, the locking mechanism 5 of this utility model includes a fixing groove 501 set on both sides of the inclined pipe section 2 or the bottom pipe section 3. A spring 502 is installed in the fixing groove 501. One end of the spring 502 is connected to a limiting block 503 that passes through the side wall of the connecting elbow 4. Both ends of the connecting elbow 4 are provided with limiting holes 504 that cooperate with the limiting blocks 503. Slider blocks 505 are fixedly connected to both sides of the limiting blocks 503. Both sides of the fixing groove 501 are provided with sliding grooves 506 for the sliders 505 to slide.

[0026] like Figure 1 and Figure 2 As shown, in this utility model, the angle of the connecting elbow 4 is 45-90 degrees, the angle between the handle pipe section 1 and the inclined side pipe section 2 is 90-135 degrees, and the diameters of the handle pipe section 1, the inclined side pipe section 2, and the bottom pipe section 3 are all 4-6cm.

[0027] Working Principle: In practical implementation, this invention first selects a suitable bottom pipe section based on the length specifications of the drill collar to be lifted. During installation, the limiting block is pressed into the fixing groove, compressing the spring, at which point the slider slides along the groove. Then, the bottom end of the beveled pipe section is aligned with one end of the connecting elbow, and the connecting elbow is rotated to fully engage the internal thread with the external thread of the beveled pipe section until the threaded connection is tightly fitted. When the limiting block aligns with the limiting hole on the side wall of the connecting elbow, the spring resets under the action of elastic potential energy, pushing the limiting block through the limiting hole and extending outwards from the connecting elbow, completing the locking and fixing of the beveled pipe section and the connecting elbow. Following the same operating steps, one end of the bottom pipe section is threadedly connected to the other end of the connecting elbow and fixed with the locking mechanism. At this time, the protrusion faces the end of the bottom pipe section away from the connecting elbow, ensuring an anti-slip effect on the drill collar.

[0028] After assembly, connect the hook and lifting ring of the hoisting equipment, and check that all connections are secure and the locking mechanism is fully engaged. Next, insert the end of the bottom pipe section furthest from the connecting elbow into the drill collar, ensuring the protrusion contacts the inner wall of the drill collar. Start the hoisting equipment; the pipe section on the lifting handle remains vertical under the hoisting force, and the inclined pipe section applies a stable pulling force to the bottom pipe section through the connecting elbow, achieving smooth hoisting of the drill collar. During hoisting, the protrusion effectively prevents the drill collar from slipping, and the locking mechanism prevents loosening of the threads between the connecting elbow and the pipe section, ensuring operational safety.

[0029] When replacing the bottom pipe section with a different specification, first press the limit block to retract it to the inside of the connecting elbow to release the locking state. Then, rotate the connecting elbow to remove the original bottom pipe section from it. After replacing the new bottom pipe section, repeat the above installation steps to complete the quick replacement. During transportation or storage, each component can be disassembled and separated, reducing space occupation and simplifying handling. If a component is damaged, only the corresponding component needs to be replaced, without scrapping the entire component, significantly reducing maintenance costs.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tool for lifting drill collars and raising short sections, comprising a lifting handle section (1), an inclined side section (2), a bottom section (3), and a connecting elbow (4), characterized in that: The top of the hanging handle section (1) and the inclined side section (2) are integrally formed. The bottom end of the inclined side section (2) is connected to one end of the bottom section (3) through the connecting elbow (4). The connecting elbow (4) is threaded to both the inclined side section (2) and the bottom section (3). Two symmetrically arranged locking mechanisms (5) are provided at the threaded connection between the bottom end of the inclined side section (2) and one end of the bottom section (3) and the connecting elbow (4).

2. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The lifting handle section (1) is vertically arranged and has a lifting ring (6) at the top for connecting the lifting equipment.

3. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The bottom pipe section (3) has a protrusion (7) at one end to prevent it from slipping during hoisting.

4. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The bottom end of the inclined pipe section (2) and the outer surface of one end of the bottom pipe section (3) are both provided with external threads, and the inner surfaces of both ends of the connecting elbow (4) are both provided with internal threads that are compatible with the external threads.

5. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The locking mechanism (5) includes a fixing groove (501) provided on both sides of the inclined pipe section (2) or the bottom pipe section (3). A spring (502) is installed in the fixing groove (501). One end of the spring (502) is connected to a limiting block (503) that passes through the side wall of the connecting elbow (4). Both ends of the connecting elbow (4) are provided with limiting holes (504) that cooperate with the limiting block (503).

6. A tool for lifting drill collars and raising short sections according to claim 5, characterized in that: The limiting block (503) is fixedly connected to sliders (505) on both sides, and the fixing groove (501) is provided with sliding grooves (506) on both sides for the sliders (505) to slide.

7. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The angle of the connecting elbow (4) is 45-90 degrees, and the angle between the hanging pipe section (1) and the inclined pipe section (2) is 90-135 degrees.

8. The tool for lifting and hoisting drill collars according to claim 1, characterized in that: The diameters of the hanging handle section (1), the inclined side section (2), and the bottom section (3) are all 4-6 cm.

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