A tubing thread protector

Abstract

The utility model discloses a kind of oil pipe thread protective sleeve, comprising: protective sleeve body, first clamping band half ring and second clamping band half ring and clamping band locking mechanism, the protective sleeve body is annular structure, the annular structure is equipped with gap suitable for opening, the outer periphery of the protective sleeve body is equipped with outer ring groove, the inner wall surface of the protective sleeve body is equipped with the inner ring groove matched with the thread section of oil pipe;The one end of the first clamping band half ring is hinged with the one end of the second clamping band half ring, the first clamping band half ring and the second clamping band half ring are suitable for annular clamping structure formed around the outer ring groove of the protective sleeve body;The clamping band locking mechanism is respectively arranged on the first clamping band half ring and the second clamping band half ring;Wherein, the protective sleeve body is suitable for sleeving on the thread section of the oil pipe.The utility model can effectively protect oil pipe thread from damage, and realize quick installation, convenient operation.

Description

Technical Field

[0001] This utility model relates to a protective sleeve for oil pipe threads, belonging to the field of oil pipe design technology. Background Technology

[0002] Currently, in the process of oil extraction and transportation, oil pipes serve as crucial transport equipment, and the integrity of their threaded connections directly affects the safety and sealing of the entire system. Traditional oil pipe threads are highly susceptible to mechanical damage, corrosion, and foreign matter contamination during storage and use, leading to problems such as decreased thread precision and seal failure.

[0003] After searching the existing technology, Chinese patent CN210365077U was found to disclose a thread protector for oil pipes that is easy to install and remove. This patent uses an inner ring thread protector and an outer ring thread protector to protect the inner and outer threads respectively, and is fixed by a threaded connection. However, it was found in use that the threaded connection method is complicated to install, requires multiple rotation operations, and has high precision requirements for the fit between the protector and the oil pipe, making it difficult to process. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a protective sleeve for oil pipe threads, which can effectively protect oil pipe threads from damage and achieve quick installation and convenient operation.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a protective sleeve for oil pipe threads, comprising:

[0006] The protective sleeve body has a ring structure with a notch suitable for opening. The outer periphery of the protective sleeve body has an outer ring groove, and the inner wall surface of the protective sleeve body has an inner ring groove that matches the threaded section of the oil pipe.

[0007] The first clamp semicircular ring and the second clamp semicircular ring are hinged together at one end of the first clamp semicircular ring and one end of the second clamp semicircular ring. The first clamp semicircular ring and the second clamp semicircular ring are adapted to form an annular clamping structure around the outer ring groove of the protective sleeve body.

[0008] A clamp locking mechanism is provided on the first clamp semicircular ring and the second clamp semicircular ring respectively;

[0009] The protective sleeve body is adapted to be fitted onto the threaded section of the oil pipe, and the clamp locking mechanism drives the first clamp semicircular ring and the second clamp semicircular ring to retract the notch of the protective sleeve body to protect the threaded section of the oil pipe that is in contact with the inner ring groove of the protective sleeve body.

[0010] Furthermore, a specific structure for a clamp locking mechanism is provided, the clamp locking mechanism comprising:

[0011] A limiting block, wherein the limiting block is provided with a limiting groove, and the limiting block is installed on the first clamp semi-circular ring;

[0012] An operating lever, one end of which is hinged to the second clamp semicircular ring;

[0013] A connecting rod, which is rotatably mounted in the middle of the operating lever, and the connecting rod is provided with at least one mounting hole;

[0014] A locking rod, the locking rod having a threaded section, is mounted on the connecting rod through the mounting hole;

[0015] A locking rod adjusting nut, wherein the locking rod adjusting nut is threadedly engaged with the threaded section of the locking rod;

[0016] The operating lever is adapted to drive the locking lever through the connecting rod, so that the locking lever cooperates with the limiting slot to connect the first clamp semicircular ring and the second clamp semicircular ring, and the locking force can be adjusted by adjusting the locking lever adjusting nut.

[0017] Furthermore, washers are provided on the inner sides of both the first clamp semicircular ring and the second clamp semicircular ring.

[0018] Furthermore, at least one end of the protective sleeve body is provided with an axially limiting abutment ring extending radially inward.

[0019] Furthermore, the inner annular groove of the protective sleeve body is provided with threads that match the threaded section of the oil pipe.

[0020] Furthermore, the inner annular groove of the protective sleeve body is provided with a taper that matches the threaded section of the oil pipe.

[0021] Furthermore, both the first and second clamp semicircular rings are made of metal.

[0022] Furthermore, the connection between the outer ring groove wall of the protective sleeve body and the end face of the protective sleeve body is provided with a rounded transition.

[0023] By adopting the above technical solution, this utility model has the following beneficial effects:

[0024] In this invention, during use, the notch of the protective sleeve body is opened and fitted onto the threaded section of the oil pipe. The inner annular groove on the inner wall of the protective sleeve body is tightly fitted with the threaded section of the oil pipe. After fitting, the first clamp semi-circular ring and the second clamp semi-circular ring are connected by hinges, forming an annular clamping structure around the outer annular groove of the protective sleeve body. The clamp locking mechanism drives the first clamp semi-circular ring and the second clamp semi-circular ring to lock together, applying a radial clamping force to the protective sleeve body, causing the notch of the protective sleeve body to contract and locking the protective sleeve body onto the threaded section of the oil pipe. This solves the technical problems of complex installation and insecure locking, and achieves the effects of rapid installation and reliable locking.

[0025] In addition, the clamp locking mechanism controls the locking force through thread adjustment to avoid installation problems caused by excessive tightness or looseness; both the inner sides of the first and second clamp semicircular rings are equipped with washers to improve the reliability of locking; the outer ring groove of the protective sleeve body is equipped with an axially limiting abutment ring extending radially inward to prevent the threaded section of the oil pipe from moving in the axial direction and to ensure accurate clamping position.

[0026] In summary, this utility model enables rapid installation, locking, and effective protection of the oil pipe thread protective sleeve, improving the protection effect and construction efficiency of the oil pipe thread section, and has the beneficial effects of convenient operation and firm locking. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the oil pipe thread protective sleeve of this utility model. Figure 1 ;

[0028] Figure 2 This is a three-dimensional structural diagram of the oil pipe thread protective sleeve of this utility model. Figure 2 ;

[0029] Figure 3 This is a three-dimensional structural diagram of the oil pipe thread protective sleeve of this utility model. Figure 3 ;

[0030] Figure 4 for Figure 3 A magnified view of part A in the middle. Detailed Implementation

[0031] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] like Figure 1-4 As shown, a protective sleeve for oil pipe threads includes:

[0033] The protective sleeve body 1 has an annular structure with a notch suitable for opening. The outer periphery of the protective sleeve body 1 has an outer annular groove 12, and the inner wall surface of the protective sleeve body 1 has an inner annular groove 13 that matches the threaded section of the oil pipe.

[0034] The first clamp semicircular ring 2 and the second clamp semicircular ring 3 are hinged together at one end of the first clamp semicircular ring 2 and one end of the second clamp semicircular ring 3. The first clamp semicircular ring 2 and the second clamp semicircular ring 3 are adapted to surround the outer ring groove 12 of the protective sleeve body 1 to form an annular clamping structure.

[0035] The clamp locking mechanism 4 is respectively disposed on the first clamp semicircular ring 2 and the second clamp semicircular ring 3;

[0036] The protective sleeve body 1 is adapted to be fitted onto the threaded section of the oil pipe, and the first clamp semicircular ring 2 and the second clamp semicircular ring 3 are driven by the clamp locking mechanism 4 to shrink the notch of the protective sleeve body 1, so as to protect the threaded section of the oil pipe that is in contact with the inner ring groove 13 of the protective sleeve body 1.

[0037] In this embodiment, as Figure 1-2 As shown, during use, the notch of the protective sleeve body 1 is opened and fitted onto the threaded section of the oil pipe. The inner annular groove 13 on the inner wall of the protective sleeve body 1 is tightly fitted with the threaded section of the oil pipe. After fitting, the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3 are hinged together, forming an annular clamping structure around the outer annular groove 12 of the protective sleeve body 1. The clamp locking mechanism 4 drives the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3 to lock, applying a radial clamping force to the protective sleeve body 1, causing the notch of the protective sleeve body 1 to contract and locking the protective sleeve body 1 onto the threaded section of the oil pipe. When the use is finished, the connection between the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3 is disconnected by the clamp locking mechanism 4, and the protective sleeve body 1 is no longer clamped, so the protective sleeve body 1 can be removed. The threaded protective sleeve can be reused throughout the process.

[0038] Specifically, such as Figure 1-2 and Figure 4 As shown, the clamp locking mechanism 4 includes:

[0039] Limiting block 41, with a limiting slot on it, is installed on the first clamp semicircular ring 2;

[0040] Operating lever 42, one end of which is hinged to the second clamp semi-circular ring 3;

[0041] Link 43 is rotatably mounted in the middle of operating lever 42, and has two mounting holes.

[0042] Locking rod 44, which has a threaded section, passes through the mounting hole and is mounted on connecting rod 43;

[0043] The locking rod adjusting nut 45 is threadedly engaged with the threaded section of the locking rod 44.

[0044] The operating lever 42 is adapted to drive the locking lever 44 through the connecting rod 43, so that the locking lever 44 cooperates with the limit slot to connect the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3, and the locking force can be adjusted by adjusting the locking lever adjusting nut 45.

[0045] In this embodiment, as Figure 1-2 and Figure 4 As shown, the operating lever 42 rotates around its hinge point with the second clamp semi-circular ring 3, causing the connecting rod 43 to move synchronously. The rotation of the connecting rod 43 causes the locking lever 44 to move to the limiting slot position of the limiting block 41, and the front end of the locking lever 44 engages in the limiting slot, realizing the initial connection between the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3. After the locking lever 44 engages in the limiting slot, the operating lever 42 continues to move backward. When the operating lever 42 rotates beyond a certain angle, the pulling force of the locking lever 44 on the connecting rod 43 is opposite to the natural rebound direction of the operating lever 42, forming a self-locking state.

[0046] In the self-locking state, the locking lever 44, through the connecting rod 43, applies a pulling force to the operating lever 42, preventing the operating lever 42 from returning to its initial position, and the operating lever 42 remains in the locked position. The first clamping semi-circular ring 2 and the second clamping semi-circular ring 3 remain tightened under this pulling force, forming a stable radial clamping force on the outer annular groove 12 of the protective sleeve body 1. Under the radial clamping force, the notch of the protective sleeve body 1 contracts, and the inner annular groove 13 fits tightly against the threaded section of the oil pipe.

[0047] By rotating the locking rod adjusting nut 45, the locking rod adjusting nut 45 moves along the threaded section of the locking rod 44, adjusting the relative position between the connecting rod 43 and the locking rod 44, thereby adjusting the clamping force between the first clamp semi-circular ring 2 and the second clamp semi-circular ring 3.

[0048] Specifically, such as Figure 2 As shown, washers are provided on the inner sides of both the first clamp semicircular ring 2 and the second clamp semicircular ring 3.

[0049] Specifically, such as Figure 2 As shown, the first clamp semicircular ring 2 and the second clamp semicircular ring 3 are made of metal.

[0050] In this embodiment, as Figure 1-2As shown, the washer is located between the contact surfaces of the first clamp semicircular ring 2 and the second clamp semicircular ring 3 and the outer annular groove 12 of the protective sleeve body 1. When the clamp locking mechanism 4 applies radial clamping force, the washer disperses the contact pressure and increases the frictional force, preventing the first clamp semicircular ring 2 and the second clamp semicircular ring 3 from sliding on the protective sleeve body 1. The washer can be made of rubber.

[0051] Specifically, such as Figure 1 As shown, at least one end of the protective sleeve body 1 is provided with an axially limiting abutment ring 5 extending radially inward.

[0052] In this embodiment, as Figure 1 As shown, the axial limiting abutment ring 5 extends from the end of the protective sleeve body 1 towards the central axis, forming a radially contracting annular structure. When the protective sleeve body 1 is fitted onto the threaded section of the oil pipe, the axial limiting abutment ring 5 contacts the end face or shoulder of the threaded section of the oil pipe, restricting the movement of the protective sleeve body 1 along the axial direction of the oil pipe.

[0053] Specifically, such as Figure 1 As shown, the inner annular groove 13 of the protective sleeve body 1 is provided with threads that match the threaded section of the oil pipe.

[0054] Specifically, such as Figure 1 As shown, the inner annular groove 13 of the protective sleeve body 1 is provided with a taper that matches the threaded section of the oil pipe.

[0055] In this embodiment, as Figure 1 As shown, the inner wall of the inner annular groove 13 of the protective sleeve body 1 is threaded. When the thread of the inner annular groove 13 is engaged with the thread of the oil pipe thread section, it creates an axial limit between the protective sleeve body 1 and the oil pipe thread section, preventing the protective sleeve body 1 from moving in the axial direction of the oil pipe.

[0056] The taper angle of the inner ring groove 13 is consistent with the taper angle of the oil pipe thread section, so that when the protective sleeve body 1 is fitted onto the oil pipe thread section, the tapered surface of the inner ring groove 13 fits into the tapered surface of the oil pipe thread section.

[0057] Specifically, such as Figure 1-2 As shown, the connection between the outer ring groove 12 of the protective sleeve body 1 and the end face of the protective sleeve body 1 is provided with a rounded transition.

[0058] In this embodiment, as Figure 1-2 As shown, the groove wall of the outer ring groove 12 of the protective sleeve body 1 is rounded at the position where it intersects with the end face of the protective sleeve body 1, forming a smooth arc connection, which avoids stress concentration.

[0059] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective sleeve for oil pipe threads, characterized in that, include: The protective sleeve body (1) has an annular structure with a notch suitable for opening. The outer periphery of the protective sleeve body (1) is provided with an outer annular groove (12), and the inner wall surface of the protective sleeve body (1) is provided with an inner annular groove (13) that matches the threaded section of the oil pipe. The first clamp semicircular ring (2) and the second clamp semicircular ring (3) are hinged at one end of the first clamp semicircular ring (2) and one end of the second clamp semicircular ring (3). The first clamp semicircular ring (2) and the second clamp semicircular ring (3) are adapted to form an annular clamping structure around the outer ring groove (12) of the protective sleeve body (1). A clamp locking mechanism (4) is provided on the first clamp semicircular ring (2) and the second clamp semicircular ring (3); The protective sleeve body (1) is adapted to be fitted onto the threaded section of the oil pipe, and the first clamp semicircular ring (2) and the second clamp semicircular ring (3) are driven by the clamp locking mechanism (4) to shrink the notch of the protective sleeve body (1) to protect the threaded section of the oil pipe that is in contact with the inner ring groove (13) of the protective sleeve body (1).

2. The oil pipe thread protective sleeve according to claim 1, characterized in that, The clamp locking mechanism (4) includes: Limiting block (41), the limiting block (41) is provided with a limiting slot, and the limiting block (41) is installed on the first clamp semicircular ring (2); Operating lever (42), one end of which is hinged to the second clamp semicircular ring (3); A connecting rod (43) is rotatably mounted in the middle of the operating rod (42), and the connecting rod (43) is provided with at least one mounting hole; A locking rod (44) is provided with a threaded section and is mounted on the connecting rod (43) through the mounting hole; Locking rod adjusting nut (45), the locking rod adjusting nut (45) is threadedly engaged with the threaded section of the locking rod (44); The operating lever (42) is adapted to drive the locking lever (44) through the connecting rod (43), so that the locking lever (44) cooperates with the limiting slot to connect the first clamp semicircular ring (2) and the second clamp semicircular ring (3), and the locking force can be adjusted by adjusting the locking lever adjusting nut (45).

3. The oil pipe thread protective sleeve according to claim 1, characterized in that, Both the first clamp semicircular ring (2) and the second clamp semicircular ring (3) have washers on their inner sides.

4. The oil pipe thread protective sleeve according to claim 1, characterized in that, The protective sleeve body (1) has an axially limiting abutment ring (5) extending radially inward on at least one end.

5. The oil pipe thread protective sleeve according to claim 1, characterized in that, The inner annular groove (13) of the protective sleeve body (1) is provided with threads that match the threaded section of the oil pipe.

6. The oil pipe thread protective sleeve according to claim 1, characterized in that, The inner annular groove (13) of the protective sleeve body (1) is provided with a taper that matches the threaded section of the oil pipe.

7. The oil pipe thread protective sleeve according to claim 1, characterized in that, The first clamp semicircular ring (2) and the second clamp semicircular ring (3) are made of metal.

8. The oil pipe thread protective sleeve according to claim 1, characterized in that, The connection between the outer ring groove (12) of the protective sleeve body (1) and the end face of the protective sleeve body (1) is provided with a rounded transition.

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