Sleeve thread protector

Abstract

The utility model discloses a casing thread protector, which relates to the technical field of thread protectors, and comprises a metal shell and a built-in rubber cylinder, a horizontal support plate is arranged in the middle of the metal shell, an inner support device is mounted at the bottom of the support plate, the inner support device comprises a screw and three sets of support components, a fixing nut is arranged at the center of the support plate, and the screw is fixed on the screw. The screw is in threaded connection with the fixing nut, the upper end is detachably provided with a rotating handle, and the lower end is rotatably provided with a rotating drum; the three sets of supporting assemblies are arranged in a circumferential array with the screw as the center. Each supporting assembly comprises a swing rod and a supporting rod. The upper end of the swing rod is hinged to the bottom of the supporting plate, the middle of the swing rod is hinged to one end of the supporting rod, and the lower end is elastically hinged to a pressing plate facing the inner wall of the built-in rubber cylinder. The other end of the supporting rod is hinged to the outer wall of the rotary drum; the inner supporting device of the device is composed of the screw rod and the multiple sets of supporting assemblies, the multiple sets of supporting assemblies can be driven to synchronously act by rotating the screw rod through the rotating handle, the inner supporting force is large, and the thread protector can be effectively fixed.

Description

TECHNICAL FIELD

[0001] The utility model relates to thread protector technical field, concretely relates to a casing thread protector. BACKGROUND

[0002] The basic structure of the thread protector is that the outside is a metal protective sleeve and the inside is rubber, and the rubber is processed with threads, and when the well team needs to lower the pipe, the thread protector needs to be removed first and then connected. When the thread protector is removed, it is found that the thread protector often tilts and is inconvenient to remove; when the oil casing is installed or removed, the thread protector needs to be rotated, and the operation time is generally 5 to 10 minutes, which brings many inconveniences.

[0003] Chinese patent CN201510476314.3 discloses a kind of oil casing quick screwing thread protector, it includes metal shell cylinder and built-in rubber cylinder;Metal shell cylinder lower end inside is equipped with the U-shaped hook of internal ring groove;Built-in rubber cylinder top inside is equipped with clamping ring table, the lower part inside of built-in rubber cylinder is equipped with the limiting ring table of inner diameter less than the inner diameter of clamping ring table, limiting ring table below built-in rubber cylinder is clamped in ring groove;The outer wall of built-in rubber cylinder is attached on the inner wall of metal shell cylinder, and they are coaxially tightly fixed;Although the thread protector can be quickly assembled and disassembled, the inner support device has small inner support force, and it is difficult to effectively fix the thread protector.

[0004] Therefore, it is urgent to develop a new type of casing thread protector. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defects of prior art, and provides a kind of casing thread protector.

[0006] The technical scheme of the utility model is: a kind of casing thread protector, including metal shell and built-in rubber cylinder, the metal shell middle part is equipped with horizontal support plate, the built-in rubber cylinder is fixed in the metal shell inner cavity of support plate lower side, its inner wall lower end is equipped with clamping ring table, its inner wall upper end is equipped with the annular groove compatible with casing end part;

[0007] The support plate bottom is equipped with inner support device, the inner support device includes screw rod and multiple sets of support components, the support plate center is equipped with fixed nut, the screw rod is threadedly connected with fixed nut, detachable mounting rotating handle is formed on its upper end, and rotating drum is rotatably installed on its lower end;Multiple sets of support components are arranged in circumferential array with screw rod as center, and support component includes swing lever and support rod;The swing lever upper end is hinged in support plate bottom, and its lower end is elastically hinged with pressing plate towards the inner wall of built-in rubber cylinder;The other end of support rod is hinged on the outer wall of rotating drum.

[0008] Preferably, anti-skid lines are arranged on the outer wall of the pressing plate.

[0009] Preferably, it also includes a fastening nut, which is threadedly connected to the screw on the upper side of the fixing nut.

[0010] Preferably, the upper end of the screw is provided with a quadrangular prism, and the center of the rotating handle is provided with a square hole that matches the quadrangular prism.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] This device is directly fitted onto the external thread of the sleeve, eliminating the need for threaded connection and enabling quick assembly and disassembly. The internal support device consists of a screw and multiple support components. Rotating the screw by turning the handle will cause the multiple support components to move synchronously. Its internal support force is large, effectively securing the thread protector. The rotating handle of this device is quick-release, preventing unauthorized personnel from arbitrarily turning the screw. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0014] Figure 2 for Figure 1 The main view;

[0015] Figure 3 This is a 3D view of the rotating handle.

[0016] In the diagram: 1. Metal casing, 2. Internal rubber cylinder, 201. Clamping ring platform, 202. Annular groove, 3. Support plate, 4. Fixing nut, 5. Screw, 6. Rotating handle, 601. Square hole, 7. Rotating cylinder, 8. Swing rod, 9. Support rod, 10. Pressure plate, 1001. Anti-slip texture, 11. Fastening nut, 12. Quadrangular prism. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0018] Reference Figure 1-3 As shown, a sleeve thread protector includes a metal housing 1 and an internal rubber sleeve 2. A horizontal support plate 3 is provided in the middle of the metal housing 1. The internal rubber sleeve 2 is fixed in the inner cavity of the metal housing 1 below the support plate 3. A clamping ring platform 201 is provided at the lower end of its inner wall, and an annular groove 202 adapted to the end of the sleeve is provided at the upper end of its inner wall.

[0019] like Figure 2 As shown, a conical cavity with a smaller top and a larger bottom is formed inside the built-in rubber cylinder 2 between the clamping ring 201 and the annular groove 202. After the sleeve is inserted into the built-in rubber cylinder 2, the external thread of the sleeve falls into the conical cavity and is protected.

[0020] The support plate 3 is provided with an inner supporting device at the bottom, the inner supporting device comprises a screw rod 5 and three sets of supporting assemblies, the support plate 3 is provided with a fixed nut 4 at the center, the screw rod 5 is threadedly connected with the fixed nut 4, a rotating handle 6 is detachably installed on the upper end of the screw rod 5, and a rotating drum 7 is rotatably installed on the lower end of the screw rod 5; the three sets of supporting assemblies are arranged in a circumferential array with the screw rod 5 as the center, the supporting assembly comprises a swing rod 8 and a supporting rod 9; the upper end of the swing rod 8 is hingedly connected to the bottom of the support plate 3, the middle part of the swing rod 8 is hingedly connected to one end of the supporting rod 9, and an elastic plate 10 towards the inner wall of the built-in rubber cylinder 2 is elastically hingedly connected to the lower end of the swing rod 8; the other end of the supporting rod 9 is hingedly connected to the outer wall of the rotating drum 7.

[0021] Specifically, the lower end of the swing rod 8 is hingedly connected to the inner wall of the elastic plate 10, and a torsional spring is installed at the hinge connection position of the two; when the elastic plate 10 is in a free state, the inner wall of the elastic plate 10 is adhered to the swing rod 8 under the action of the torsional spring.

[0022] In order to increase the friction between the elastic plate 10 and the inner wall of the sleeve, the outer wall of the elastic plate 10 is provided with anti-skid lines 1001.

[0023] When installing, the device is sleeved on the external thread of the sleeve, the end of the sleeve is inserted into the annular groove 202, at this time, the external thread of the sleeve falls into the conical cavity and is protected; then the rotating handle 6 is installed on the upper end of the screw rod 5, the screw rod 5 is rotated through the rotating handle 6, the screw rod 5 is stretched outwards, the screw rod 5 drives the three sets of supporting assemblies to expand outwards synchronously, and the outer wall of the elastic plate 10 is pressed on the inner wall of the sleeve; finally, the rotating handle 6 is removed, and the installation is completed.

[0024] When disassembling, the rotating handle 6 is installed on the upper end of the screw rod 5, the screw rod 5 is reversely rotated through the rotating handle 6, the screw rod 5 is retracted inwards, the screw rod 5 drives the three sets of supporting assemblies to retract inwards synchronously, so that the elastic plate 10 is away from the inner wall of the sleeve; finally, the rotating handle 6 is removed, and the device is dismounted.

[0025] The device is directly sleeved on the external thread of the sleeve, without the need of being threadedly connected with the external thread of the sleeve, so that quick dismounting can be realized; the inner supporting device is composed of the screw rod 5 and the multiple sets of supporting assemblies, the screw rod 5 can drive the multiple sets of supporting assemblies to move synchronously by rotating the screw rod 5 through the rotating handle 6, the inner supporting force is large, and the threaded protector can be effectively fixed; the rotating handle 6 of the device is of a quick dismounting type, and can prevent unrelated personnel from arbitrarily rotating the screw rod 5. Embodiment two

[0026] As a preferred embodiment of the utility model, the embodiment adds a fastening nut 11 on the basis of the embodiment one, and the rotating handle 6 is designed, specifically:

[0027] The embodiment further comprises a fastening nut 11 which is screwed with the screw rod 5 on the upper side of the fixing nut 4. In order to prevent the screw rod 5 from being reversed during transportation, after the rotary handle 6 is removed, the fastening nut 11 needs to be screwed onto the screw rod 5 and tightly abut against the fixing nut 4.

[0028] The upper end of the screw rod 5 is provided with a quadrangular prism 12, and the rotary handle 6 is provided with a square hole 601 in the center of the rotary handle 6 and matched with the quadrangular prism 12. In use, the square hole 601 of the rotary handle 6 is connected with the quadrangular prism 12, so that the installation of the rotary handle 6 is completed.

[0029] The utility model is not limited to the above-mentioned implementation, still can make various changes in the knowledge range of the person skilled in the art without departing from the utility model's purpose, the changed content still belongs to the protection range of the utility model.

Claims

1. A sleeve thread protector, comprising a metal housing and a built-in rubber sleeve, characterized in that: The metal shell has a horizontal support plate in the middle, and the built-in rubber cylinder is fixed in the inner cavity of the metal shell below the support plate. The lower end of its inner wall is provided with a clamping ring platform, and the upper end of its inner wall is provided with an annular groove that matches the end of the sleeve. An internal support device is installed at the bottom of the support plate. The internal support device includes a screw and multiple sets of support components. A fixing nut is provided at the center of the support plate. The screw is threadedly connected to the fixing nut. A rotating handle is detachably installed at its upper end, and a rotating cylinder is rotatably installed at its lower end. Multiple sets of support components are arranged in a circumferential array around the screw. The support components include a swing rod and a support rod. The upper end of the swing rod is hinged to the bottom of the support plate, the middle part is hinged to one end of the support rod, and the lower end is elastically hinged to a pressure plate facing the inner wall of the built-in rubber cylinder. The other end of the support rod is hinged to the outer wall of the rotating cylinder.

2. The sleeve thread protector according to claim 1, characterized in that: The outer wall of the pressure plate is provided with anti-slip texture.

3. The sleeve thread protector according to claim 1, characterized in that: It also includes a fastening nut, which is threadedly connected to the screw on the upper side of the fixing nut.

4. A sleeve thread protector according to claim 1, characterized in that: The upper end of the screw is provided with a quadrangular prism, and the center of the rotating handle is provided with a square hole that matches the quadrangular prism.

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