Oil casing external thread protective cover easy to disassemble

Abstract

The utility model discloses an oil casing external thread protection cover easy to disassemble, and belongs to the technical field of pipe thread protection. Comprising an elastic shell; the elastic shell is coaxially arranged at the end, provided with the external threads, of the oil sleeve in a sleeving mode. The inner diameter of the elastic shell is 1-3 mm larger than the outer diameter of the oil casing in an uncompressed state. The outer part of the elastic shell is coaxially sleeved with an outer shell; the inner wall face of the outer shell is tightly attached to the elastic shell. The elastic shell is sleeved at one end of the external thread of the oil casing, so that the external thread is protected, a worker can conveniently dismount the oil casing without using an auxiliary tool pipe wrench during casing running operation, manpower is saved, and time efficiency is improved. An outer shell is further arranged outside the elastic shell, the elastic shell is further fixed to the oil casing pipe, and the elastic shell is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe thread protection and relates to an easily detachable oil casing external thread protection cover. Background Art

[0002] Oil casing, also known as production casing. It is the last layer of casing in the casing process of oil and gas wells, from the wellhead to below the oil and gas layer. Oil casing is connected by external threads. As the drilling and production operations of oil and gas wells develop towards deeper, higher pressure and higher temperature and other more demanding working conditions, and the oil drilling and production technology continues to advance, the protection of the external threads of oil casing is particularly important. Otherwise, when the external threads are damaged, it will cause risks to the connection of oil casing, especially under harsh working conditions, the reliability of the connection of oil casing must be guaranteed. Therefore, the protection of the external threads of oil casing is very important. The existing external thread protection cover of oil casing is mainly composed of an external metal shell. When the casing is lowered, the workers at the well site will put the thread protection cover on the cleaned external threads of the casing. When the casing is sent to the drilling platform, the workers must first remove the external thread protection cover before entering the well. The existing threaded protective covers have the disadvantages of being too tight on the threads, being misaligned on the threads, and being difficult to remove. All of them require pipe clamps to assist in unbuckling, and are not easy to remove. This unbuckling method not only consumes manpower, but also prolongs the casing lowering operation time, which is not conducive to saving time in the intermediate completion operation. Utility Model Content

[0003] The utility model aims to solve the technical problem that the threaded protective cover of the oil casing is difficult to remove in the prior art, and provides an easily detachable external threaded protective cover for the oil casing.

[0004] In order to achieve the above purpose, the utility model provides the following solutions:

[0005] In a first aspect, the utility model provides an easily detachable oil casing external thread protective cover, comprising an elastic shell; the elastic shell is coaxially sleeved on the oil casing and provided with one end of the external thread; the inner diameter of the elastic shell is 1-3 mm larger than the outer diameter of the oil casing in an uncompressed state.

[0006] The further improvement of the utility model is:

[0007] The outer coaxial sleeve of the elastic shell is provided with an outer shell; the inner wall surface of the outer shell is tightly fitted with the elastic shell.

[0008] The material of the outer shell is metal.

[0009] The elastic shell and the outer shell are bonded together by industrial glue.

[0010] It also includes a strap; the elastic shell is provided with a strap ring for the strap to pass through and fix the elastic shell on the oil casing.

[0011] Buckles are arranged at both ends of the strap.

[0012] The elastic shell is made of rubber.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model discloses an easily detachable oil casing external thread protective cover, which adopts an elastic shell to cover one end of the external thread of the oil casing, so as to protect the external thread and enable workers to remove the casing by hand without using auxiliary tools such as pipe clamps during casing lowering operations, thus saving manpower and improving time efficiency.

[0015] Furthermore, an outer shell is provided outside the elastic shell to further fix the elastic shell on the oil casing and protect the elastic shell.

[0016] Furthermore, a drawstring ring is provided on the elastic shell, so that an elastic fixing rope such as a drawstring can pass through to further strengthen the contact between the elastic shell and the oil casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a half-section structural schematic diagram of an easily detachable oil casing external thread protective cover in the utility model;

[0019] Figure 2 The utility model is a structure diagram of a tie band of an easily detachable oil casing external thread protective cover.

[0020] Wherein: 1-outer shell; 2-elastic shell; 3-cinch belt; 4-cinch belt ring; 5-oil casing; 6-buckle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The utility model is further described in detail below with reference to the accompanying drawings:

[0028] Example 1

[0029] See also Figure 1The utility model discloses an easily detachable oil casing external thread protective cover, comprising an elastic shell 2; the elastic shell 2 is coaxially sleeved on the oil casing 5 and is provided with one end of external thread; the inner diameter of the elastic shell 2 is 1 mm larger than the outer diameter of the oil casing 5 in an uncompressed state. The outer coaxial sleeve of the elastic shell 2 is provided with an outer shell 1, and the elastic shell 2 and the outer shell 1 are bonded by industrial glue. The elastic shell 2 and the outer shell 1 can be bonded together with industrial glue before use on the construction site, or can be bonded together with industrial glue in a high temperature environment when leaving the factory; the inner wall surface of the outer shell 1 is tightly fitted with the elastic shell 2. The material of the outer shell 1 is metal. The elastic shell 2 is higher than the outer shell 1; a strap ring 4 is provided on the part of the elastic shell 2 higher than the outer shell 1, which is used for the strap 3 to pass through and fix the elastic shell 2 on the oil casing 5. The material of the elastic shell 2 is rubber. The rubber is a high temperature resistant rubber, including silicone rubber, fluororubber, butyl rubber and polytetrafluoroethylene.

[0030] See also Figure 2 , buckles 6 are provided at both ends of the tie band 3. A tie band ring is provided on the elastic shell, which is convenient for elastic fixing ropes such as tie bands to pass through to further strengthen the contact between the elastic shell and the oil casing.

[0031] Example 2

[0032] The utility model discloses an easily detachable oil casing external thread protective cover, comprising an elastic shell 2; the elastic shell 2 is coaxially sleeved on the oil casing 5 and provided with one end of external thread; the inner diameter of the elastic shell 2 is 2 mm larger than the outer diameter of the oil casing 5 in an uncompressed state. An outer shell 1 is coaxially sleeved on the outside of the elastic shell 2; the inner wall surface of the outer shell 1 is tightly fitted with the elastic shell 2. The material of the outer shell 1 is metal. The elastic shell 2 and the outer shell 1 are bonded by industrial glue, and the elastic shell 2 and the outer shell 1 can be bonded together with industrial glue before use at the construction site, or can be bonded together with industrial glue in a high temperature environment when leaving the factory. The material of the elastic shell 2 is rubber. Including silicone rubber, fluororubber, butyl rubber and polytetrafluoroethylene.

[0033] Example 3

[0034] The utility model discloses an easily detachable oil casing external thread protective cover, comprising an elastic shell 2; the elastic shell 2 is coaxially sleeved on the oil casing 5 and provided with one end of external thread; the inner diameter of the elastic shell 2 is 3 mm larger than the outer diameter of the oil casing 5 in an uncompressed state. A strap ring 4 is provided on the elastic shell 2, which is used for the strap 3 to pass through and fix the elastic shell 2 on the oil casing 5. The material of the elastic shell 2 is rubber. The rubber is a high temperature resistant rubber, including silicone rubber, fluororubber, butyl rubber and polytetrafluoroethylene.

[0035] See also Figure 2 , buckles 6 are provided at both ends of the tie band 3. A tie band ring is provided on the elastic shell, which is convenient for elastic fixing ropes such as tie bands to pass through to further strengthen the contact between the elastic shell and the oil casing.

[0036] The utility model discloses an easily detachable oil casing external thread protective cover, which adopts an elastic shell sleeved on one end of the external thread of the oil casing, which not only plays a role in protecting the external thread, but also makes it convenient for workers to remove the casing without using auxiliary tools such as pipe clamps, which saves manpower and improves time efficiency. Furthermore, an outer shell is also provided on the outside of the elastic shell, which further fixes the elastic shell on the oil casing and protects the elastic shell. Furthermore, a drawstring ring is provided on the elastic shell, which facilitates the elastic fixing rope such as a drawstring to pass through to further strengthen the contact between the elastic shell and the oil casing.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An easily detachable oil casing external thread protective cover, characterized in that: It comprises an elastic shell (2); the elastic shell (2) is coaxially sleeved on the oil casing (5) and is provided with one end having an external thread; the inner diameter of the elastic shell (2) is 1-3 mm larger than the outer diameter of the oil casing (5) in an uncompressed state; The outer coaxial sleeve of the elastic shell (2) is provided with an outer shell (1); the inner wall surface of the outer shell (1) is tightly fitted with the elastic shell (2); and a strap (3) is also included; the elastic shell (2) is provided with a strap ring (4) for passing the strap (3) through to fix the elastic shell (2) on the oil casing (5).

2. The easily detachable oil casing external thread protective cover according to claim 1 is characterized in that: The outer shell (1) is made of metal.

3. The easily detachable oil casing external thread protective cover according to claim 1, characterized in that: The elastic shell (2) and the outer shell (1) are bonded together using industrial glue.

4. The easily detachable oil casing external thread protective cover according to claim 1, characterized in that: Buckles (6) are provided at both ends of the strap (3).

5. The easily detachable oil casing external thread protective cover according to claim 1, characterized in that: The material of the elastic shell (2) is rubber.

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