An oil well wellhead seal condition acquisition component

Abstract

The present application relates to the technical field of oil equipment, in particular to an oil well wellhead sealing state acquisition component, which is especially suitable for the application scenario of monitoring the sealing effect of the wellhead of a pumping unit well. The component adopts a sealed flow guide cavity to accumulate the liquid leaked from the wellhead of the pumping unit well to form pressure, and uses the structure design of a gas bag to conduct the pressure to a pressure collector. The component includes a connecting base, a flow guide cavity, a gas bag, a pressure collector, a gland and a sheet-shaped packing. The component is connected to the top of the oil well sealing packing box through the connecting base. When the liquid in the oil well leaks from the upper part of the wellhead sealing packing box, it will enter the flow guide cavity and squeeze the gas bag. After the gas bag is stressed, it will conduct the pressure to the pressure collector. The structure design of the present application senses the liquid leakage of the oil well through pressure conduction, and transmits the signal to the monitoring software system of the server through the pressure collector connected with the gas bag. The software system monitors the sealing failure state. The design is suitable for the daily management needs of real-time monitoring of the sealing state of the wellhead of the pumping unit well, thereby providing the oil production workers with wellhead leakage early warning and disposal reminders, and reducing the occurrence of environmental pollution consequences caused by the leakage of the oil-water mixed liquid from the wellhead.

Description

Technical Field

[0001] This invention relates to the field of Internet of Things (IoT) information acquisition technology, and in particular to a component for acquiring the sealing status of an oil wellhead. Background Technology

[0002] Currently, wellhead sealing in oilfield pumping units primarily employs a sealing packing box with additional packing. During pumping unit operation, the polished rod undergoes reciprocating linear motion. Traditional packing boxes use internally packed packing to grip the polished rod, sealing the annular gap between the polished rod and the casing wellhead to prevent crude oil and well fluid from leaking to the surface. However, as the packing wears down, its sealing performance rapidly declines, leading to well fluid leakage and dripping. In severe cases, this can cause crude oil leakage, polluting soil, water, and the atmosphere, failing to meet environmental protection requirements. How to predict the sealing performance of oil wellheads in advance and avoid pollution consequences due to leakage of crude oil mixtures has always been a goal pursued by oilfield well managers. This design addresses this practical need and possesses significant practicality and socio-economic value. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a structural design for an oil wellhead sealing status acquisition component that solves the above problems.

[0004] According to one aspect of the present invention, a structural design for a wellhead sealing status acquisition component is provided, comprising a connecting base, a flow guide cavity, a sheet packing, a gland, an air bladder, and a pressure acquisition device.

[0005] According to one possible design, the base of the component can be easily assembled with the upper part of the existing sealing packing box of the pumping well using a threaded connection, ensuring a quick connection between the component and the packing box.

[0006] According to one possible design, if the wellhead packing box seal fails and causes liquid leakage, the leaked liquid will enter the guide cavity. Since the upper part of the guide cavity is sealed by the pressure cap pressing the sheet packing, together with the connecting base, a sealed space is formed in the guide cavity, which is conducive to the accumulation of liquid in the guide cavity and prevents leakage.

[0007] According to one possible design, the liquid accumulated in the flow channel will compress the airbag and cause the gas pressure inside the airbag to increase, thereby transmitting the pressure generated by the compression to the pressure collector.

[0008] This invention employs a design that connects a sealed flow guide cavity to an airbag, ensuring that any liquid leakage at the wellhead of the pumping unit is transmitted in a timely manner as a pressure signal to the server through the compression of the airbag. The server software system then monitors and analyzes the pressure values, providing well managers with timely early warnings of wellhead leakage. Attached Figure Description

[0009] Figure 1 A schematic diagram of a component for collecting the sealing status of an oil wellhead; 1—Connecting base, 2—Optical rod, 3—Flow guide cavity, 4—Sheet packing, 5—Pressure cap, 6—Airbag, 7—Pressure collector. Detailed Implementation

[0010] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0011] The terms "comprising" and "having," and any variations thereof, in the specification, embodiments, claims, and drawings of this invention are intended to cover non-exclusive inclusion, such as including a series of steps or units.

[0012] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] A structural design for an oil wellhead sealing status acquisition component, such as Figure 1 As shown, it includes a connecting base (1), a flow guide cavity (3), a sheet packing (4), a pressure cap (5), an airbag (6), and a pressure collector (7).

[0014] The lower part of the connecting base (1) is connected to the wellhead sealing packing box, and the upper part is connected to the guide cavity (3). The upper part of the guide cavity (3) is connected to the sheet packing (4), and the side of the guide cavity (3) is connected to the airbag (6).

[0015] The upper part of the sheet packing (4) is connected to the cap (5).

[0016] The airbag (6) is located on the side of the flow guide cavity (3) and is connected to the pressure collector (7).

[0017] In one embodiment, the component is quickly connected to the upper part of the existing packing box of the oil well by means of threaded assembly of the component's connecting base (1), and the sealing function of the existing conventional packing box is improved and a sealing failure alarm function is added.

[0018] In one embodiment, the airbag (6) is squeezed by the leaked liquid, which causes the gas pressure inside the airbag (6) to rise. The gas pressure is transmitted to the pressure acquisition device (7) connected to the airbag (6), and the pressure value of the pressure rise in the guide cavity (3) caused by the leaked liquid is obtained through the pressure acquisition device (7). The pressure value is then transmitted to the server at regular intervals to provide a basis for real-time monitoring and analysis of the sealing status of the pumping unit wellhead.

[0019] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A structural design for an oil wellhead sealing status acquisition component, characterized in that, The system includes a connecting base (1), a flow guide cavity (3), a sheet packing (4), a pressure cap (5), an air bladder (6), and a pressure collector (7). The components are connected to the top of the wellhead sealing packing box of the pumping unit via the connecting base (1). The flow guide cavity (3) communicates with the connecting base (1), and the upper part of the flow guide cavity (3) is sealed by pressing the sheet packing (4) with the pressure cap (5). The sheet packing (4) and the connecting base (1) together ensure that the flow guide cavity (3) forms a sealed space. The airbag (6) is connected to the guide cavity (3). If the wellhead sealing packing box fails, the liquid produced by the oil well will leak along the polished rod (2). At this time, the leaked liquid will enter the guide cavity (3). Since the guide cavity (3) forms a sealed space, the leaked liquid will continuously accumulate in the guide cavity (3). The accumulated liquid will continuously squeeze the airbag (6), which will cause the gas pressure in the airbag (6) to gradually increase. The gas pressure will be transmitted to the pressure collector (7) connected to the airbag (6). The pressure collector (7) will periodically collect the pressure value in the airbag (6) and transmit it to the server.

2. The structural design of the wellhead sealing status acquisition component as described in claim 1, characterized in that, The upper part of the guide cavity (3) is pressed by the pressure cap (5) to form a sheet packing (4), which together with the connecting base (1) forms a sealed space for the guide cavity (3). This ensures that when the leaking liquid caused by the failure of the wellhead packing box seal enters the guide cavity (3), it accumulates in the guide cavity (3), which facilitates the superconducting of the accumulated pressure generated by the liquid in the guide cavity (3) to the airbag (6), ensuring that the pressure acquisition device (7) connected to the airbag (6) can obtain the pressure increase value. The pressure acquisition device (7) periodically transmits the pressure value change to the server.

3. The structural design of the wellhead sealing status acquisition component as described in claim 1, characterized in that, The component is compact and easy to install. The component's connecting base (1) can be quickly connected to the existing sealing packing box in the oil well, and the existing conventional packing box can be modified to add a sealing failure alarm function.

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