Non-rotating cannula skimmer

Abstract

The utility model provides a kind of non-rotating casing scraper, comprising: mandrel, two copper rings, scraper, breaker, lower joint and O-ring, two the copper ring is sleeved in the both sides of the mandrel surface, the scraper is sleeved in the surface of the mandrel and is located between two the copper ring, the breaker is sleeved in the right side of the mandrel surface, the lower joint is sleeved in the surface of the mandrel, the O-ring is sleeved between the mandrel and the core joint.The utility model provides a kind of non-rotating casing scraper, by being respectively arranged two copper rings, scraper, breaker and O-ring between mandrel and upper joint, can effectively crush residual material, exfoliation, improve scraping efficiency, solve the problem of incomplete scraping, also can reduce the risk of sticking, scraper relative to mandrel is not rotating, effectively avoid the damage of scraper to casing.

Description

Technical Field

[0001] This utility model relates to the field of sleeve scrapers, and more particularly to a non-rotating sleeve scraper. Background Technology

[0002] Casing scrapers can be used to remove cement blocks, cement rings, hard wax, various salt crystals and deposits, perforation burrs, and iron oxide produced after casing corrosion from the inner wall of the casing, so as to allow for the unobstructed insertion of various downhole tools.

[0003] To reduce the number of downhole casing operations, a mechanical casing scraper was designed to work in conjunction with other tools. However, in actual use, due to various working conditions, the scraper wears down the casing when it is drilling along with the drill bit or milling tool. In addition, conventional scrapers cannot effectively break down hard residues and spalling materials, leading to stuck drill accidents.

[0004] Therefore, it is necessary to provide a non-rotating sleeve scraper to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a non-rotating sleeve scraper, which solves the problem that, in actual use, due to various actual working conditions, the scraper wears the sleeve when drilling with the drill bit or milling tool, and conventional scrapers cannot effectively break hard residues and flaking materials, leading to drill jamming accidents.

[0006] To solve the above-mentioned technical problems, this utility model provides a non-rotating sleeve scraper, comprising:

[0007] The mandrel comprises two copper rings, a scraper, a crusher, a lower connector, and an O-ring. The two copper rings are fitted on both sides of the surface of the mandrel. The scraper is fitted on the surface of the mandrel and located between the two copper rings. The crusher is fitted on the right side of the surface of the mandrel. The lower connector is fitted on the surface of the mandrel. The O-ring is fitted between the mandrel and the mandrel connector.

[0008] Preferably, a set screw is provided between the mandrel and the lower connector.

[0009] Preferably, the scraper is made of high-elasticity alloy steel.

[0010] Preferably, the crusher is made of high-strength alloy steel.

[0011] Preferably, the crusher is used for crushing impurities.

[0012] Preferably, the surface of the crusher is provided with a replacement component, which includes two crushing sleeves, an annular groove, four arc-shaped positioning blocks and two arc-shaped positioning slots. The two crushing sleeves are symmetrically fitted inside the annular groove, the four arc-shaped positioning blocks are respectively connected to the two ends of the two crushing sleeves, and the two arc-shaped positioning slots are opened on the surface of the crusher and located on both sides of the annular groove.

[0013] Preferably, a fixing component is provided between the crusher and the arc-shaped positioning block. The fixing component includes a fixing bolt and a fixing hole. The fixing hole is opened between the arc-shaped positioning block and the crusher, and the fixing bolt is disposed inside the fixing hole.

[0014] Compared with related technologies, the non-rotating sleeve scraper provided by this utility model has the following beneficial effects:

[0015] This utility model provides a non-rotating casing scraper. By setting two copper rings, a scraper, a crusher, and an O-ring between the mandrel and the upper connector, it can effectively crush residual materials and flaking materials, improve scraping efficiency, solve the problem of incomplete scraping, and reduce the risk of stuck drill. The scraper does not rotate relative to the mandrel, which effectively avoids damage to the casing by the scraper. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a first embodiment of a non-rotating sleeve scraper provided by this utility model;

[0017] Figure 2 A schematic diagram of the structure of a first embodiment of a non-rotating sleeve scraper provided by this utility model;

[0018] Figure 3 for Figure 2 The enlarged schematic diagram of part A is shown.

[0019] Labels in the diagram: 1. Mandrel; 2. Copper ring; 3. Scraper; 4. Crusher; 5. Lower connector; 6. O-ring seal; 7. Set screw;

[0020] 8. Replace components; 81. Crushing sleeve; 82. Annular groove; 83. Arc-shaped positioning block; 84. Arc-shaped positioning groove;

[0021] 9. Fixing component; 91. Fixing bolt; 92. Fixing hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] First Embodiment

[0024] Please refer to the following: Figure 1 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a non-rotating sleeve scraper provided by this utility model. A non-rotating sleeve scraper includes:

[0025] The mandrel 1, two copper rings 2, a scraper 3, a crusher 4, a lower connector 5, and an O-ring seal 6 are provided. The two copper rings 2 are fitted on both sides of the surface of the mandrel 1. The scraper 3 is fitted on the surface of the mandrel 1 and located between the two copper rings 2. The crusher 4 is fitted on the right side of the surface of the mandrel 1. The lower connector 5 is fitted on the surface of the mandrel 1. The O-ring seal 6 is fitted between the mandrel 1 and the mandrel connector 5.

[0026] A set screw 7 is provided between the mandrel 1 and the lower connector 5.

[0027] The scraper 3 is made of high-elasticity alloy steel.

[0028] The crusher 4 is made of high-strength alloy steel.

[0029] The crusher 4 is used for crushing impurities.

[0030] The crushing mechanism is installed at the lower end of the spindle 1. It consists of multiple diamond-shaped crushing teeth. The crushing teeth body is made of high-strength alloy steel and coated with hard alloy, which has high hardness and wear resistance. It can effectively crush hard dirt and scale on the inner wall of the casing. The crushing teeth are distributed in a ring on the circumference of the crushing head. The spacing and angle between adjacent crushing teeth have been optimized to ensure that the inner wall of the casing can be crushed in a comprehensive and uniform manner during rotation, avoiding crushing dead angles.

[0031] The scraping mechanism is located at the top of the crushing mechanism. The scraper 3 is made of high-elasticity alloy steel, which allows the scraper 3 to maintain good scraping contact when encountering minor unevenness or dimensional changes on the inner wall of the casing. At the same time, it plays a buffering role, reducing blade wear and impact on the casing. The number and arrangement of the blades are also carefully designed to ensure comprehensive and efficient scraping and cleaning of the inner wall of the casing, improving scraping quality and efficiency. The blade surface is specially hardened to have good scraping performance. Meanwhile, high-lubricity and wear-resistant copper rings are installed on both sides of the scraper to effectively scrape off dirt and other attached impurities after crushing during rotation.

[0032] This device requires the connection of downhole tools for operation. After being lowered into the well via drill pipe, the scraper 3, under the action of elasticity, adheres tightly to the inner wall of the casing. Because the force between the scraper 3 and the casing is much greater than the friction between the scraper 3 and the mandrel 1, the scraper rotates relative to the mandrel 1. It only moves radially relative to the casing and remains relatively stationary in the axial direction. During the drilling process, the breaking teeth on the breaker 4 break up the stubborn dirt and scale on the inner wall of the casing during rotation, decomposing them into smaller particles. Under the action of the elastic support component, the scraper 3 of the scraping mechanism adheres tightly to the inner wall of the casing, scraping off the broken dirt and other attached impurities, and carrying them out of the casing through the circulation of well fluid. The centralizer always keeps the scraper in the centered position inside the casing, ensuring the uniformity and stability of the breaking and scraping operations.

[0033] The biggest difference between this device and a conventional mechanical casing scraper is that: during the drilling process, the scraper blade of a conventional mechanical casing scraper rotates with the drill string, which causes wear and damage to the casing; the scraper blade of a conventional mechanical casing scraper relies on elasticity to adhere tightly to the casing, which makes it impossible to break some hard residues and flaking materials, resulting in incomplete scraping.

[0034] Compared with related technologies, the non-rotating sleeve scraper provided by this utility model has the following beneficial effects:

[0035] This utility model provides a non-rotating casing scraper. By setting two copper rings 2, a scraper 3, a crusher 4 and an O-ring 6 between the mandrel 1 and the upper connector 5, it can effectively crush the residue and peeling material, improve scraping efficiency, solve the problem of incomplete scraping, and reduce the risk of drill jamming. The scraper 3 does not rotate relative to the mandrel 1, which effectively avoids damage to the casing by the scraper.

[0036] Second Embodiment

[0037] Please refer to the following: Figure 2 and Figure 3 Based on the non-rotating sleeve scraper provided in the first embodiment of this application, the second embodiment of this application proposes another non-rotating sleeve scraper. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0038] Specifically, the second embodiment of this application provides a non-rotating sleeve scraper that differs in that the surface of the crusher 4 is provided with a replacement component 8. The replacement component 8 includes two crushing sleeves 81, an annular groove 82, four arc-shaped positioning blocks 83, and two arc-shaped positioning grooves 84. The two crushing sleeves 81 are symmetrically fitted inside the annular groove 82. The four arc-shaped positioning blocks 83 are respectively connected to the two ends of the two crushing sleeves 81. The two arc-shaped positioning grooves 84 are opened on the surface of the crusher 4 and located on both sides of the annular groove 82.

[0039] An annular groove 82 is formed on the surface of the crusher 4. The annular groove 82 facilitates the installation of the two crushing sleeves 81. The use of the arc-shaped positioning block 83 facilitates the installation of the crushing sleeve 81 and the crushing sleeve 1 using the fixing bolt 91.

[0040] A fixing component 9 is provided between the crusher 4 and the arc-shaped positioning block 83. The fixing component 9 includes a fixing bolt 91 and a fixing hole 92. The fixing hole 92 is opened between the arc-shaped positioning block 83 and the crusher 4, and the fixing bolt 91 is disposed inside the fixing hole 92.

[0041] The working principle of the non-rotating sleeve scraper provided by this utility model is as follows:

[0042] When the crusher 4 is worn out after a long period of use, first remove the fixing bolt 91 between the arc-shaped positioning block 83 and the crusher 4. After the fixing bolt 91 is removed, pull the crushing sleeve 81 to separate it from the annular groove 82, and at the same time, pull the arc-shaped positioning block 83 to separate it from the arc-shaped positioning groove 84. Then the two crushing sleeves 81 on the surface of the crusher 4 can be replaced.

[0043] Compared with related technologies, the non-rotating sleeve scraper provided by this utility model has the following beneficial effects:

[0044] This utility model provides a non-rotating sleeve scraper, which has two crushing sleeves 81, arc grooves 82, four arc positioning blocks 83 and two arc positioning grooves 84 on the surface of the crusher 4, and works with two fixing components 9. After long-term use on the surface of the crusher 4, the surface of the crusher 4 will be severely worn, and the two crushing sleeves 81 on the surface of the crusher 4 can be disassembled and replaced.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A non-rotating sleeve scraper, characterized in that, include: The mandrel, mandrel connector, two copper rings, scraper, crusher, lower connector, and O-ring seal are provided. The two copper rings are fitted on both sides of the mandrel surface. The scraper is fitted on the surface of the mandrel and located between the two copper rings. The crusher is fitted on the right side of the mandrel surface. The lower connector is fitted on the surface of the mandrel. The O-ring seal is fitted between the mandrel and the mandrel connector. The surface of the crusher is provided with a replacement component, which includes two crushing sleeves, an annular groove, four arc-shaped positioning blocks and two arc-shaped positioning slots. The two crushing sleeves are symmetrically fitted inside the annular groove. The four arc-shaped positioning blocks are respectively connected to the two ends of the two crushing sleeves. The two arc-shaped positioning slots are opened on the surface of the crusher and located on both sides of the annular groove. A fixing component is provided between the crusher and the arc-shaped positioning block. The fixing component includes a fixing bolt and a fixing hole. The fixing hole is opened between the arc-shaped positioning block and the crusher, and the fixing bolt is disposed inside the fixing hole.

2. A non-rotating sleeve scraper according to claim 1, characterized in that, A set screw is provided between the mandrel and the lower connector.

3. A non-rotating sleeve scraper according to claim 1, characterized in that, The scraper is made of high-elasticity alloy steel.

4. A non-rotating sleeve scraper according to claim 1, characterized in that, The crusher is made of high-strength alloy steel.

5. A non-rotating sleeve scraper according to claim 1, characterized in that, The crusher is used for crushing impurities.

Images