Pumping unit wellhead packing leakage monitoring and control device

Abstract

The utility model provides a pumping unit wellhead packing leakage monitoring and control device which comprises a packing box gland, an oil receiving tank, a liquid monitoring component and an alarm component, the packing box gland is arranged below the oil receiving tank and connected with the oil receiving tank, a channel communicated with the oil receiving tank is arranged in the packing box gland, and the liquid monitoring component is connected with the liquid monitoring component. A first mounting hole is formed in the bottom of the oil receiving tank, the liquid monitoring component is arranged in the first mounting hole, and the liquid monitoring component is in communication connection with the alarm component and the oil pumping unit. Crude oil leakage can be effectively controlled, environment pollution is avoided, and meanwhile the safety of constructors is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas field exploitation, and particularly relates to a monitoring and control device for the leakage of the stuffing box of a pumping unit at the wellhead. Background Art

[0002] During the process of oil and gas exploitation, the pumping unit is an important power device. During the use of the pumping unit, sealing is carried out through the stuffing box to ensure that the crude oil in the well does not leak outwards. As the core component in the stuffing box, the packing often ages or wears after long-term operation, resulting in leakage. For some high-oil-pressure wells, once there is leakage in the well and the pumping unit is not stopped in time, the crude oil will inevitably leak over a larger area, polluting the wellhead and the ground; for single wells with high hydrogen sulfide content, the leakage will cause a large amount of hydrogen sulfide to escape, threatening the lives of surrounding personnel. Content of the Utility Model

[0003] An object of the utility model is to provide a monitoring and control device for the leakage of the stuffing box of a pumping unit at the wellhead, which can effectively control the leakage of crude oil, avoid environmental pollution, and ensure the safety of construction personnel at the same time.

[0004] According to the utility model, there is provided a monitoring and control device for the leakage of the stuffing box of a pumping unit at the wellhead, including: a stuffing box gland, an oil receiving tank, a liquid monitoring component, and an alarm component. The stuffing box gland is arranged below the oil receiving tank and connected to the oil receiving tank. A channel communicating with the oil receiving tank is provided inside the stuffing box gland. A first mounting hole is opened at the bottom or side of the oil receiving tank. The liquid monitoring component is arranged in the first mounting hole, and the liquid monitoring component is communicatively connected to both the alarm component and the pumping unit.

[0005] In a preferred embodiment, the top surface of the stuffing box gland is higher than the bottom surface of the oil receiving tank.

[0006] In a preferred embodiment, the liquid monitoring component has a probe. The first mounting hole is opened at the side of the oil receiving tank, and the position of the probe is flush with the top surface of the stuffing box gland or 1 cm to 6 cm higher than the top surface of the stuffing box gland.

[0007] In a preferred embodiment, a second mounting hole is opened at the bottom of the oil receiving tank, and the inlet end of the sewage pipe is arranged in the second mounting hole.

[0008] In a preferred embodiment, the stuffing box gland is configured as a cylindrical structure, and two groups of parallel concave parts are arranged on its outer contour.

[0009] In a preferred embodiment, the pumping unit wellhead packing leakage monitoring and control device further comprises an observation cover, and the observation cover is arranged in the top surface of the oil receiving box.

[0010] In a preferred embodiment, the observation cover is connected to the oil receiving box via threads.

[0011] In a preferred embodiment, a thrust handle is provided on the top of the observation cover.

[0012] In a preferred embodiment, the viewing cover is configured as a circular disc.

[0013] In a preferred embodiment, the bottom of the packing box gland is constructed as an internal threaded hole, and the size of the internal threaded hole matches the external thread of the packing cavity of the packing box.

[0014] The utility model has at least the following technical effects:

[0015] According to the utility model, a packing box pressure cover, an oil receiving box, a liquid monitoring component and an alarm component are provided. Since the packing box pressure cover is arranged below the oil receiving box and is connected to the oil receiving box, the packing box pressure cover is used to compress the packing and has a passage connected to the oil receiving box inside, so that the leaked crude oil in the well finally enters the oil receiving box. Since a first mounting hole is provided on the oil receiving box, the liquid monitoring component is arranged in the first mounting hole, and the liquid monitoring component is communicatively connected with the alarm component and the oil pumping unit. When the leaked crude oil entering the oil receiving box contacts the liquid monitoring component, the liquid monitoring component can monitor the leaked crude oil and can send a control signal to the oil pumping unit and the alarm component, so as to control the alarm component to sound and light alarm while controlling the oil pumping unit to stop, so as to effectively remind the monitoring personnel to quickly find the abnormality on site in the PCS system, deal with it on site as soon as possible, control the leakage of crude oil, avoid environmental pollution, and ensure the safety of construction personnel at the same time.

[0016] According to the utility model, the top end surface of the packing box gland is higher than the bottom surface of the oil receiving tank. After the leaked crude oil enters the oil receiving tank, it can flow down from high to low to the bottom surface of the oil receiving tank, thereby facilitating the leakage of the crude oil to be discharged outward.

[0017] According to the utility model, a thrust handle is provided on the top of the observation cover, so that the observation cover can be easily disassembled by providing the thrust handle, thereby facilitating the docking of the oil tank for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of a pumping unit wellhead packing leakage monitoring and control device according to an embodiment of the utility model is schematically shown.

[0019] In this application, all the attached drawings are schematic drawings, only used to illustrate the principle of the present utility model, and are not drawn according to the actual proportion. Detailed implementation manners

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the attached drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the present utility model, unless otherwise clearly defined and limited, the term "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] As Figure 1 shown, the sucker rod pumping well stuffing box leakage monitoring and control device 100 of the present utility model includes: a stuffing box gland 1 and an oil receiving tank 2. The stuffing box gland 1 is used to compress the packing to ensure that the crude oil in the well does not leak outwards. The stuffing box gland 1 is arranged below the oil receiving tank 2 and connected to the oil receiving tank 2. The stuffing box gland 1 and the oil receiving tank 2 both have vertical channels in the same axial direction, and the sizes of the two channels match the sizes of the polished rod (not shown in the figure) of the sucker rod pumping unit (not shown in the figure). The polished rod of the sucker rod pumping unit has a clearance fit with the two channels and can move up and down vertically in the two channels. The top end of the stuffing box gland 1 is arranged inside the oil receiving tank 2. Optionally, the stuffing box gland 1 is integrally connected to the oil receiving tank 2 by welding. When the packing in the stuffing box leaks due to aging or wear, the leaked crude oil finally enters the oil receiving tank 2.

[0023] A first mounting hole 4 is provided on the side or bottom of the oil receiving tank 2. The liquid monitoring component is arranged in the first mounting hole 4. Optionally, the inner wall of the first mounting hole 4 has an internal threaded hole, and the liquid monitoring component is in threaded fit with it so that it is installed inside the oil receiving tank 2. Optionally, the liquid monitoring component can be a float type liquid level switch. The liquid monitoring component is communicatively connected to an alarm component (not shown in the figure) and the sucker rod pumping unit. The alarm component can be an audible and visual alarm.

[0024] According to the present utility model, there are provided a packing box gland 1, an oil receiving tank 2, a liquid monitoring component, and an alarm component. Since the packing box gland 1 is disposed below and connected to the oil receiving tank 2, the packing box gland is used to compress the packing and has a channel communicating with the oil receiving tank inside, so that the leaked crude oil in the well finally enters the oil receiving tank 2. Also, since a first mounting hole 4 is provided on the oil receiving tank 2, the liquid monitoring component is disposed in the first mounting hole 4, and the liquid monitoring component is communicatively connected to both the alarm component and the pumping unit. When the leaked crude oil entering the oil receiving tank 2 contacts the liquid monitoring component, the liquid monitoring component can monitor the leaked crude oil and can send a control signal to the pumping unit and the alarm component to control the pumping unit to stop operating while controlling the alarm component to give an audible and visual alarm, so as to effectively remind the monitoring personnel to quickly discover the abnormality on site in the pcs system, go to the site for disposal as soon as possible, control the crude oil leakage, avoid environmental pollution, and ensure the safety of construction personnel at the same time.

[0025] In one or more embodiments, the packing box gland 1 is configured as a cylindrical structure, and two sets of parallel recesses are provided on its outer contour for providing a bearing surface for a pipe wrench or a spanner.

[0026] In one or more embodiments, the bottom of the packing box gland 1 is configured as an internal threaded hole, and the size of the internal threaded hole matches the external thread of the packing cavity of the packing box. In some other examples, the bottom of the packing box gland 1 is configured as an external threaded cylinder, and the size of the external threaded cylinder matches the internal thread of the packing cavity of the packing box.

[0027] In one or more embodiments, the top end surface of the packing box gland 1 is higher than the bottom surface of the oil receiving tank 2.

[0028] According to the present utility model, the top end surface of the packing box gland 1 is higher than the bottom surface of the oil receiving tank 2. After the leaked crude oil enters the interior of the oil receiving tank 2, it can flow from high to low to the bottom surface of the oil receiving tank 2, so as to facilitate the outward discharge of the leaked crude oil. In one or more embodiments, the liquid monitoring component has a probe. In order to ensure more accurate monitoring of abnormal leakage, the first mounting hole 4 is opened on the side of the oil receiving tank 2, and the position of the probe is flush with the top end surface of the packing box gland 1 or 1 cm to 6 cm higher than the top end surface of the packing box gland 1.

[0029] In one or more embodiments, the oil receiving tank 2 is configured as a hollow cylindrical structure.

[0030] In one or more embodiments, a second mounting hole 6 is opened at the bottom of the oil receiving tank 2, and the inlet end of a sewage pipe (not shown in the figure) is disposed in the second mounting hole 6. Optionally, the inner wall of the second mounting hole 6 has an internal threaded hole, and the sewage pipe is in threaded fit with it so that it is installed inside the oil receiving tank 2.

[0031] According to the present utility model, a second mounting hole 6 is formed in the bottom of the oil receiving tank 2, and the inlet end of the sewage pipe is disposed in the second mounting hole 6, so that the crude oil leaked in the oil receiving tank 2 can be guided along the sewage pipe to a designated container, thereby avoiding environmental pollution.

[0032] In one or more embodiments, the pumping unit wellhead packing leakage monitoring and control device of the present utility model further includes an observation cover 3, and the observation cover 3 is disposed in the top surface of the oil receiving tank 2.

[0033] In one or more embodiments, the observation cover 3 and the oil receiving tank 2 are connected by threads.

[0034] In one or more embodiments, the observation cover 3 is configured as a circular disc body and is made of a transparent material, thus facilitating observation.

[0035] In one or more embodiments, a thrust handle 5 is provided on the top of the observation cover 3.

[0036] According to the present utility model, a thrust handle 5 is provided on the top of the observation cover 3, so that by providing the thrust handle 5, it is convenient to disassemble the observation cover 3, and thus it is convenient to clean the oil receiving tank 2.

[0037] Although the present utility model has been described with reference to the preferred embodiments, various modifications can be made to it and components thereof can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A monitoring and control device for the leakage of the stuffing box at the wellhead of a pumping unit, characterized in that Comprising: A packing box gland, an oil receiving tank, a liquid monitoring component, and an alarm component. The packing box gland is arranged below the oil receiving tank and connected to the oil receiving tank. A channel communicating with the oil receiving tank is provided inside the packing box gland. A first mounting hole is formed in the bottom or side of the oil receiving tank. The liquid monitoring component is arranged in the first mounting hole. The liquid monitoring component is communicatively connected to both the alarm component and the pumping unit.

2. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 1, characterized in that, The top surface of the packing box gland is higher than the bottom surface of the oil receiving tank.

3. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 2, characterized in that, The liquid monitoring component has a probe. The first mounting hole is formed in the side of the oil receiving tank, and the position of the probe is flush with the top surface of the packing box gland or 1 cm to 6 cm higher than the top surface of the packing box gland.

4. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 2, characterized in that, A second mounting hole is formed in the bottom of the oil receiving tank. The inlet end of the sewage pipe is arranged in the second mounting hole.

5. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 2, characterized in that The packing box gland is configured as a cylindrical structure, and two sets of parallel recesses are provided on its outer contour.

6. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 1, characterized in that It further includes an observation cover, and the observation cover is arranged inside the top surface of the oil receiving tank.

7. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 6, characterized in that, The observation cover is threadedly connected to the oil receiving tank.

8. The oil pumping wellhead packing leakage monitoring and control device according to claim 7, characterized in that, A thrust handle is provided on the top of the observation cover.

9. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 6, characterized in that, The observation cover is configured as a circular disc.

10. The sucker rod pumping well stuffing box leakage monitoring and control device according to claim 1, characterized in that, The bottom of the packing box gland is configured as an internal threaded hole, and the size of the internal threaded hole matches the external thread of the packing cavity of the packing box.

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