Sealing packing device for sucker rod of pumping unit

Abstract

The utility model discloses a pumping unit sucker rod sealing packing device which comprises a sealing packing body, an upper metal ring, a lower metal ring, an annular air bag and an air inlet nozzle, a first open groove is formed in the bottom end of the sealing packing body, a second open groove is formed in the top end of the sealing packing body, the upper metal ring is installed at the second open groove, and the lower metal ring is installed at the lower end of the sealing packing body. An annular air bag groove is formed in the top end of the first open groove and communicated with the first open groove, an annular air bag is installed at the annular air bag groove, a lower metal ring is installed at the first open groove and tightly presses the bottom end of the annular air bag, and the top end of the annular air bag is communicated with an air inlet nozzle. The air inlet nozzle penetrates through the sealing packing body to the position above the sealing packing body. The sealing packing device for the sucker rod of the pumping unit is convenient to disassemble and assemble, local deformation of the sealing packing body in the transverse direction can be controlled through the arrangement of the annular air bag, inflation and pressurization can be carried out after the outer wall of the sealing packing body is abraded, the sealing capacity is improved, and waste caused by direct replacement of the packing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packing, in particular to a sealing packing device for a sucker rod of an oil pumping unit. Background Art

[0002] Sucker rods are widely used in oilfield production equipment, mainly used to connect oil pumps to lift crude oil in the wellbore to the ground. After a period of use, traditional packings have a loose seal with the inner wall of the pumping well, resulting in oil leakage. New packings need to be replaced, which is troublesome and wastes a lot of materials. Utility Model Content

[0003] The purpose of the present application is to provide a sealing packing device for a pumping rod of an oil pumping unit to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a pumping unit sucker rod sealing packing device, comprising a sealing packing body, an upper metal ring, a lower metal ring, an annular airbag and an air inlet nozzle, the bottom end of the sealing packing body is provided with a first groove, the top end of the sealing packing body is provided with a second groove, an upper metal ring is installed at the second groove, an annular airbag groove is provided at the top end of the first groove, the annular airbag groove is connected with the first groove, an annular airbag is installed at the annular airbag groove, a lower metal ring is installed at the first groove, the lower metal ring presses the bottom end of the annular airbag, the top end of the annular airbag is connected with the air inlet nozzle, and the air inlet nozzle passes through the sealing packing body to the top of the sealing packing body.

[0005] Preferably, a plurality of bolts are inserted and installed on the upper metal ring, and the bottom ends of the bolts pass through the interior of the sealing packing body to the first slot and are threadedly connected to the lower metal ring.

[0006] Preferably, the annular airbag groove is arranged inside the sealing packing body near the side edge.

[0007] Preferably, the upper metal ring and the lower metal ring are both stainless steel rings.

[0008] Preferably, the sealing packing body, the upper metal ring and the lower metal ring enclose an oil pumping polished rod channel in the vertical direction.

[0009] In summary, the technical effects and advantages of the utility model are:

[0010] The utility model provides a pumping rod sealing packing device for an oil pumping unit, which is easy to assemble and disassemble. The annular airbag can be set to control the local deformation of the sealing packing body in the lateral direction. After the outer wall is worn, it can be inflated and pressurized to improve the sealing ability, thus avoiding the waste caused by directly replacing the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic structural diagram of a sealing packing device for a pumping rod of an oil pumping unit in an embodiment of the present application;

[0013] Figure 2 It is a schematic cross-sectional structure diagram of a sealing packing device for a sucker rod of an oil pumping unit in an embodiment of the present application.

[0014] In the figure: 1. Sealing packing body; 2. Upper metal ring; 3. Lower metal ring; 4. First slot; 5. Annular airbag slot; 6. Annular airbag; 7. Air inlet nozzle; 8. Oil extraction polished rod channel; 9. Second slot; 10. Bolt. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying 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 of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.

[0018] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0019] Example: Reference Figure 1-2 The pumping rod sealing packing device shown in the figure comprises a sealing packing body 1, an upper metal ring 2, a lower metal ring 3, an annular airbag 6 and an air inlet nozzle 7. The bottom end of the sealing packing body 1 is provided with a first slot 4, the top end of the sealing packing body 1 is provided with a second slot 9, the upper metal ring 2 is installed at the second slot 9, the top end of the first slot 4 is provided with an annular airbag slot 5, the annular airbag slot 5 is connected to the first slot 4, and an annular airbag is installed at the annular airbag slot 5 6. A lower metal ring 3 is installed at the first slot 4. The lower metal ring 3 presses the bottom end of the annular airbag 6. The top of the annular airbag 6 is connected with an air inlet nozzle 7. The air inlet nozzle 7 penetrates the sealing packing body 1 to the top of the sealing packing body 1. When the outer wall of the sealing packing body is worn and the seal is unreliable, the annular airbag is inflated through the air inlet nozzle to increase its air pressure. The deformation of the annular airbag is transmitted to the sealing packing body 1, and the outer wall of the sealing packing body 1 bulges to make up for the wear defects at the sealing position.

[0020] By means of the above structure: a plurality of bolts 10 are installed on the upper metal ring 2, and the bottom ends of the bolts 10 pass through the inside of the sealing packing body 1 to the first slot 4 and are threadedly connected to the lower metal ring 3, so that the upper metal ring 2 and the lower metal ring 3 are locked by the bolts, and at the same time, the lower metal ring presses and fixes the annular airbag.

[0021] With the above structure, the annular airbag groove 5 is arranged inside the sealing packing body 1 near the side.

[0022] According to the above structure: the upper metal ring 2 and the lower metal ring 3 are both stainless steel rings.

[0023] By means of the above structure: the sealing packing body 1, the upper metal ring 2 and the lower metal ring 3 enclose an oil pumping polished rod channel 8 in the vertical direction.

[0024] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing packing device for a pumping rod of an oil pumping unit, characterized in that: The invention comprises a sealing packing body (1), an upper metal ring (2), a lower metal ring (3), an annular airbag (6) and an air inlet nozzle (7); the bottom end of the sealing packing body (1) is provided with a first groove (4); the top end of the sealing packing body (1) is provided with a second groove (9); the upper metal ring (2) is installed at the second groove (9); the top end of the first groove (4) is provided with an annular airbag groove (5); the annular airbag groove (5) is connected to the first groove (4); the annular airbag (6) is installed at the annular airbag groove (5); the first groove (4) is provided with a lower metal ring (3); the lower metal ring (3) presses the bottom end of the annular airbag (6); the top end of the annular airbag (6) is connected to the air inlet nozzle (7); the air inlet nozzle (7) passes through the sealing packing body (1) to the top of the sealing packing body (1).

2. The sealing packing device for a pumping rod of an oil pumping unit according to claim 1, characterized in that: A plurality of bolts (10) are inserted and installed on the upper metal ring (2), and the bottom ends of the bolts (10) pass through the interior of the sealing packing body (1) to the first slot (4) and are threadedly connected to the lower metal ring (3).

3. The sealing packing device for a pumping rod of a pumping unit according to claim 1, characterized in that: The annular airbag groove (5) is arranged inside the sealing packing body (1) near the side edge.

4. The sealing packing device for a pumping rod of an oil pumping unit according to claim 1, characterized in that: The upper metal ring (2) and the lower metal ring (3) are both stainless steel rings.

5. The sealing packing device for the sucker rod of a pumping unit according to claim 1, characterized in that: The sealing packing body (1), the upper metal ring (2) and the lower metal ring (3) enclose an oil pumping polished rod channel (8) in the vertical direction.

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