Steel wire rope end locking nipple

Abstract

The utility model relates to the technical field of oil extraction, in particular to a steel wire rope end locking nipple. A steel wire rope end locking short section comprises a shell. The interior of the shell is hollow, a conical sliding way is arranged on the upper portion of the hollow position, and a slip block used for locking the end of the steel wire rope is arranged in the conical sliding way in a sliding mode. And an auxiliary locking device is arranged at the lower part of the hollow part, and is provided with a hole for the end of the steel wire rope to pass through. The slip block structure is used, the end of the steel wire rope can be automatically locked through the conical sliding way after the end of the steel wire rope penetrates through the slip block structure, and the end of the steel wire rope can be rapidly locked; after the slip block locks the end of the steel wire rope, the center nail is nailed into the center of the end of the steel wire rope from the center hole, so that the end of the steel wire rope is more tightly contacted with the slip block; after the steel wire rope is locked, a bolt is screwed into the bolt hole, and the fan-shaped block is pushed to further lock the steel wire rope, so that the steel wire rope is prevented from breaking away due to tensile force during use.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production, in particular to a wire rope end locking pup joint. Background Art

[0002] The pumping unit is the primary lifting device in a rod pumping system, primarily used for oil extraction. The pumping unit structure includes a pumping unit sling, which suspends the oil well's polished rod, keeping it fixed in the center of the well during oil extraction.

[0003] Currently, during the production of oilfield pumping wells, the ends of the pumping unit's transmission wire ropes require frequent replacement due to changes in the pumping unit's load and natural damage to the wire rope ends. When replacing the wire rope ends on-site, both ends must be filled with lead or secured with rope clips. This process requires melting the lead, but on-site conditions are often unavailable. Even if such conditions were available, the process would be complex, time-consuming, and labor-intensive. Rope clips are also prone to breakage, rendering the wire rope ends unable to withstand the excessive load. This can lead to injuries during the pumping unit's production process, and the wire rope ends often slip, impacting the normal production of the wells. Summary of the Invention

[0004] The utility model aims to solve the above-mentioned problems and proposes a wire rope end locking short section. It has a simple structure and can automatically lock the wire rope end by relying on a tapered slide after the wire rope end passes through. After locking, a center nail is used to nail the center of the wire rope end from the center hole to make the wire rope end in close contact with the slip block. At the same time, a bolt is screwed into the bolt hole to push the fan-shaped block to further tighten the wire rope end, thereby preventing the wire rope end from breaking free due to tension during use, and the wire rope end can be quickly locked.

[0005] The technical solution of the utility model is:

[0006] A wire rope end locking pup section comprises a shell; the interior of the shell is hollow, a conical slide is provided at the upper portion of the hollow part, a slip block for locking the wire rope end is slidably provided in the conical slide; an auxiliary locking device is provided at the lower portion of the hollow part, and a hole is provided on the auxiliary locking device for the wire rope end to pass through.

[0007] The auxiliary locking device is a cylindrical groove with a hole for the wire rope end to pass through; a fan-shaped block for auxiliary locking is provided in the cylindrical groove; and bolt holes are provided on the shell at positions corresponding to the fan-shaped block.

[0008] The top of the shell is also provided with a top cover, and the top cover is provided with a central hole. The aperture of the central hole is larger than the aperture of the wire rope end. The central hole, the tapered slideway and the hole are co-centered.

[0009] An elastic pressing plate is provided between the top cover and the top of the shell.

[0010] It also includes a center nail, the top cap diameter of the center nail is larger than the hole diameter of the center hole, and the tip of the center nail extends into the tapered slide.

[0011] There are three slip blocks in total, and the inner surface of the slip block is provided with a spiral slip tooth, and the outer surface of the spiral slip tooth is arc-shaped.

[0012] The technical effects of the utility model are:

[0013] 1. The utility model uses a slip block structure, which can automatically lock the wire rope end by relying on the tapered slide after the wire rope end passes through, and can quickly lock the wire rope end;

[0014] 2. After the slip block locks the wire rope end, the utility model uses a center nail to be nailed into the center of the wire rope end through the center hole, so that the wire rope end and the slip block are in closer contact; after the wire rope is locked, the bolt is screwed into the bolt hole to push the fan-shaped block to further lock the wire rope, thereby preventing the wire rope from breaking free due to tension during use;

[0015] 3. When the utility model is disassembled, the elastic pressure plate blocks the slip block during the lifting process of the wire rope end, so that the slip block is automatically opened and locked, and the wire rope end is quickly adjusted upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a wire rope end locking short section.

[0017] Figure numerals: 1, top cover; 2, center hole; 3, cava tooth; 4, center nail; 5, elastic pressure plate; 6, cava block; 7, conical slide; 8, shell; 9, hole; 10, cylindrical groove; 11, bolt hole; 12, fan-shaped block. DETAILED DESCRIPTION

[0018] Example 1

[0019] A wire rope end locking pup section comprises a shell 8; the shell 8 is hollow inside, a conical slide 7 is provided at the upper part of the hollow part, a slip block 6 for locking the wire rope end is slidably provided in the conical slide 7; an auxiliary locking device is provided at the lower part of the hollow part, and a hole 9 for the wire rope end to pass through is provided on the auxiliary locking device.

[0020] The specific implementation process of this embodiment is as follows: the wire rope end passes through the conical slideway 7 and the cylindrical groove 10 from top to bottom in sequence, and the slip block 6 is squeezed downward by force until the slip block 6 quickly locks the wire rope end.

[0021] Example 2

[0022] In accordance with Example 1, the invention further comprises: the auxiliary locking device is a cylindrical groove 10 having a hole 9 extending therethrough for the wire rope end to pass through; a sector-shaped block 12 for auxiliary locking is disposed within the cylindrical groove 10; and bolt holes 11 are disposed on the housing 8 at locations corresponding to the sector-shaped block 12. After the wire rope is tightened, a bolt is screwed into the bolt hole 11, pushing the sector-shaped block 12 to further tighten the wire rope, thereby preventing the wire rope from breaking free due to tension during use.

[0023] Example 3

[0024] In accordance with Example 2, the present invention further comprises: a top cover 1 is provided on the top of the housing 8, the top cover 1 having a central hole 2 with a diameter larger than the diameter of the wire rope end. The central hole 2, the tapered slideway 7, and the hole 9 are co-centric. An elastic pressure plate 5 is provided between the top cover 1 and the top of the housing 8. A central pin 4 is also provided. The diameter of the top cap of the central pin 4 is larger than the diameter of the central hole 2, and the tip of the central pin 4 extends into the tapered slideway 7.

[0025] The specific implementation process of this embodiment is as follows:

[0026] The wire rope end is passed through the center hole 2, the tapered slide 7, and the cylindrical plug in sequence, and the top cover 1 is tightened with the housing 8. The elastic pressure plate 5 pushes the slip block 6 to slide downward along the tapered slide 7, which can realize the automatic locking of the wire rope end by the slip block 6. The center nail 4 is driven into the center of the wire rope end through the center hole 2 to make the wire rope end and the slip block 6 contact more closely. On the other hand, during disassembly, the elastic pressure plate 5 blocks the slip block 6 during the lifting process of the wire rope end, realizing the automatic opening of the slip block 6 and the rapid upward position adjustment of the wire rope end.

[0027] Example 4

[0028] Based on the embodiment 3, the invention further comprises: there are three slip blocks 6, and the inner surface of each slip block 6 is provided with a spiral slip tooth 3, and the outer surface of each spiral slip tooth 3 is arc-shaped. This facilitates the slip block 6 to automatically lock the wire rope by means of the tapered slide 7 after the wire rope end passes through, and can quickly lock the wire rope end without damaging the surface of the wire rope end.

Claims

1. A wire rope end locking sub, characterized by: The utility model comprises a shell (8); the interior of the shell (8) is hollow, a conical slideway (7) is provided at the upper part of the hollow part, a slip block (6) for locking the end of the wire rope is slidably provided in the conical slideway (7); an auxiliary locking device is provided at the lower part of the hollow part, and a hole (9) for the end of the wire rope to pass through is provided on the auxiliary locking device.

2. The wire rope end locking sub according to claim 1, characterized in that: The auxiliary locking device is a cylindrical groove (10) with a hole (9) passing through the cylindrical groove (10) for the end of the wire rope to pass through; a sector block (12) for auxiliary locking is provided in the cylindrical groove (10); and a bolt hole (11) is provided on the housing (8) at a position corresponding to the sector block (12).

3. The wire rope end locking sub according to claim 1, characterized in that: The top of the housing (8) is also provided with a top cover (1), and the top cover (1) is provided with a center hole (2). The aperture of the center hole (2) is larger than the aperture of the wire rope end. The center hole (2), the tapered slideway (7) and the hole (9) are co-centered.

4. The wire rope end locking sub according to claim 3, characterized in that: An elastic pressure plate (5) is provided between the top cover (1) and the top of the shell (8).

5. The wire rope end locking sub according to claim 4, characterized in that: It also includes a center nail (4), the top cap diameter of the center nail (4) is larger than the hole diameter of the center hole (2), and the tip of the center nail (4) extends into the tapered slideway (7).

6. The wire rope end locking sub according to claim 1, characterized in that: There are three slip blocks (6) in total, and the inner surface of each slip block (6) is provided with a spiral slip tooth (3), and the outer surface of the spiral slip tooth (3) is in an arc shape.

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