Integrated oil lubrication cartridge device of wellhead packing box

Abstract

The application relates to the technical field of wellhead packing box lubrication, and discloses an integrated engine oil lubricating bin device of a wellhead packing box, which comprises an oil bin, a filling bin, oil injection holes, an oil filling mechanism, a push plate and an observation mechanism. The filling bin is fixedly connected to the bottom end of the oil bin and communicates with the oil bin. A hollow channel is arranged at the longitudinal center position of the filling bin and the oil bin, and the hollow channel can ensure that a polished rod slides in the hollow channel. The oil injection holes are arranged in multiple numbers and are arranged on the inner wall of the filling bin. The oil filling mechanism is arranged on one side of the oil bin. The push plate is rotatably arranged in the filling bin through a rotating mechanism. The multiple side walls of the push plate are respectively in contact with the inner walls of the oil bin and the filling bin. The technical scheme can solve the problems that the existing technology needs to manually and periodically add butter or engine oil into the packing box, the lubrication is discontinuous and uneven, the maintenance cost is high, and the environment is polluted.

Description

Technical Field

[0001] This invention relates to the field of wellhead packing box lubrication technology, specifically to an integrated oil lubrication chamber device for wellhead packing boxes. Background Technology

[0002] As a core dynamic sealing component at the wellhead of a pumping unit, the wellhead packing box is a crucial device for ensuring continuous oil production operations. Its core function is to seal the annular gap between the tubing and the sucker rod. During pumping unit operation, the sucker rod reciprocates up and down at a certain frequency. The packing box must continuously prevent the leakage of the oil, gas, and water mixture from the well, thus avoiding crude oil loss and ensuring wellhead operation safety and a clean well site environment. Its structure adopts a layered sleeve design, consisting of a base sleeve, a connecting sleeve, a gland sleeve, and a pressure-resistant sleeve. The base sleeve is precisely connected and fixed to the wellhead tubing flange, and the connecting sleeve achieves the sealing connection of each component. During operation, by gradually turning the gland sleeve, the pressure-resistant sleeve is driven to move smoothly along the axial direction, applying uniform and controllable pressure to the internal packing assembly, causing the packing to tightly adhere to the surface of the polished rod, forming a dynamic sealing surface adapted to the reciprocating motion. Depending on the different well conditions in the oilfield, packing boxes are divided into several types, including ordinary type and self-sealing type. The ordinary type is suitable for well conditions with normal pressure and low sand content, while the self-sealing type is suitable for well sites with high pressure and high gas content. Some high-end models also integrate wellhead adjustment and automatic polished rod alignment functions, which can effectively compensate for slight deviations during the operation of the pumping unit, alleviate the problem of uneven wear between the polished rod and the packing, and effectively control wellhead leakage. At the same time, it optimizes the contact state of the friction pair, reduces the frictional resistance between the packing and the polished rod, and indirectly achieves energy saving and consumption reduction of the pumping unit.

[0003] Because the packing box is under dynamic sealing conditions for a long time, the internal packing (mostly made of flexible sealing materials such as rubber and PTFE) directly contacts and rubs against the high-frequency reciprocating polished rod. The heat and wear generated by this friction directly affect the sealing performance and service life of the packing. Therefore, scientific and reasonable lubrication maintenance is a key link in extending component life and ensuring stable operation. Traditional lubrication methods generally adopt the mode of manually adding grease or machine oil periodically. Due to the characteristics of manual operation and working conditions, there are many unavoidable technical defects: First, lubrication is discontinuous. The manual adding cycle is usually set at 8-24 hours according to well conditions. During the cycle, the lubricant is continuously consumed and aged with friction, which easily forms dry or semi-dry friction conditions on the friction pair surface, accelerating packing aging, cracking and wear, leading to premature seal failure and wellhead leakage; Second, lubrication is uneven. Manual adding is mostly fixed-point injection, which makes it difficult to distribute the lubricant evenly along the circumference and axis of the polished rod, easily resulting in local lubrication blind spots. Excessive wear on the polished rod and packing not only shortens the lifespan of the components but may also cause scratches on the polished rod surface, further exacerbating the risk of seal failure. Third, maintenance costs are high. Frequent packing failures require downtime for replacement, which not only increases the consumption of packing, lubricants, and other materials but also occupies effective oil production time, reduces the oil production rate, and indirectly affects the overall production efficiency of the oilfield, while also increasing manual maintenance costs. Fourth, there is a risk of environmental pollution. During manual refueling, lubricant drips and spills are prone to occur, and waste lubricant residues are difficult to fully recover. These pollutants can easily seep into the well site soil and surrounding water bodies, damaging the ecological environment. Summary of the Invention

[0004] This invention proposes an integrated oil lubrication chamber device for wellhead packing boxes, which solves the problems of discontinuous and uneven lubrication, high maintenance costs, and environmental pollution risks that arise from the manual periodic addition of grease or oil to the packing box in the prior art.

[0005] The technical solution of the present invention is as follows: An integrated oil lubrication chamber device for a wellhead packing box includes an oil chamber, and further includes: a filling chamber, an oil injection hole, a refueling mechanism, a push plate, and an observation mechanism. The filling chamber is fixedly connected to the bottom end of the oil chamber and is connected to the oil chamber. A hollow channel is provided at the longitudinal center of the filling chamber and the oil chamber. The hollow channel can ensure that the polished rod slides in the hollow channel. Multiple oil injection holes are provided, and the multiple oil injection holes are opened on the inner wall of the filling chamber. The refueling mechanism is set on one side of the oil chamber and is used to introduce lubricating oil into the oil chamber. The push plate is rotatably set in the filling chamber through a rotating mechanism. Multiple side walls of the push plate are respectively in contact with the inner wall of the oil chamber and the inner wall of the filling chamber. The rotating mechanism is used to drive the push plate to rotate around the hollow channel in the filling chamber and push the oil out through the oil outlet hole. The observation mechanism is set on the other side of the oil chamber and is used to observe the oil reserve in the oil chamber.

[0006] Preferably, the refueling mechanism includes: a refueling pipe, a top cover, and a discharge pipe. The refueling pipe is connected to one side of the oil tank, the top cover is fastened to the top of the refueling pipe, the discharge pipe is connected to the bottom of the oil tank, and a bottom cover capable of sealing the discharge pipe is installed at the bottom of the discharge pipe.

[0007] Furthermore, the rotating mechanism includes a gear ring, a rotating rod, and a motor. The gear ring is rotatably connected to the inner bottom wall of the oil tank. A through groove is provided on the push plate. One side of the gear ring is located in the through groove, and the gear ring is fixedly connected to the inner wall of the through groove. The rotating rod is rotatably connected to the bottom cover. A drive gear is fixedly connected to the top end of the rotating rod. The drive gear meshes with the gear ring. The motor is installed at the bottom end of the bottom cover, and the output end of the motor passes through the bottom cover and is fixedly connected to the rotating rod.

[0008] Furthermore, the observation mechanism includes: a bent tube and a transparent plastic tube. There are two bent tubes, both of which are connected to the other side of the oil tank. The other ends of the two bent tubes are opposite each other, and the two ends of the transparent plastic tube are respectively connected to the opposite ends of the two bent tubes.

[0009] As a further aspect of this application, the refueling pipe is equipped with a filter screen capable of filtering impurities in the oil.

[0010] As a further embodiment of this application, a support ring is fixedly connected to the inner bottom wall of the oil tank, and the toothed ring is rotatably connected to the circumferential surface of the support ring.

[0011] Furthermore, based on the aforementioned scheme, multiple oil injection holes are evenly distributed on the inner wall of the filling chamber, and the diameter of each of the multiple oil injection holes does not exceed one millimeter.

[0012] As a preferred technical solution of this application, both the oil tank and the filling tank are made of 1 mm thick 2Cr13 stainless steel plates and are welded together to form a closed oil storage cavity.

[0013] The working principle and beneficial effects of this invention are as follows:

[0014] 1. Long-lasting lubrication: The motor drives the drive gear and gear ring to rotate. When the gear ring rotates, it drives the push plate to rotate in the oil tank and filling tank, thereby continuously pushing the oil in the filling tank through the oil filling hole to the hollow channel. This can continuously lubricate the hollow channel and the polished rod, avoiding the dry running period caused by intermittent lubrication, and keeping the sealing ring in a good lubrication state at all times.

[0015] 2. Uniform lubrication: Multiple oil injection holes are evenly distributed on the inner wall of the filling chamber. Oil is supplied through multiple evenly distributed micro-holes to ensure that the oil can evenly cover the entire circumference of the polished rod, avoiding localized uneven wear.

[0016] 3. Convenient and intuitive maintenance: Equipped with a transparent plastic tube and a refueling tube, maintenance personnel can quickly determine the oil level and replenish it. The drain port at the bottom is easy to clean and maintain.

[0017] 4. Environmental protection and economy: Continuous lubrication between the polished rod and the hollow channel can reduce the wear of the packing, thereby reducing crude oil leakage caused by seal failure. At the same time, it can significantly reduce the consumption of seal rings and the downtime for replacement, resulting in significant overall economic benefits. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0021] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the rotating mechanism of the present invention;

[0023] Figure 5 This is a cross-sectional structural schematic diagram of the refueling pipe of the present invention;

[0024] Figure 6 This is a schematic diagram of the observation mechanism of the present invention;

[0025] Figure 7 This is a cross-sectional structural schematic diagram of the oil tank and refueling tank of the present invention.

[0026] In the diagram: 1. Oil tank; 2. Filling tank; 3. Hollow channel; 4. Oil filling hole; 5. Push plate; 6. Filling pipe; 7. Top cover; 8. Discharge pipe; 9. Bottom cover; 10. Gear ring; 11. Through groove; 12. Rotating rod; 13. Drive gear; 14. Motor; 15. Bend; 16. Transparent plastic tube; 17. Filter screen; 18. Support ring. Detailed Implementation

[0027] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0028] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0029] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0031] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0032] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0033] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure.

[0034] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0035] like Figures 1-7 As shown, this embodiment proposes an integrated oil lubrication chamber device for a wellhead packing box, including an oil tank 1, and further including: a filling chamber 2, oil injection holes 4, a filling mechanism, a push plate 5, and an observation mechanism. Multiple oil injection holes 4 are evenly distributed on the inner wall of the filling chamber 2, and the diameter of each oil injection hole 4 does not exceed one millimeter. Due to the low fluidity of the oil, the small design of the oil injection holes 4 slows down the amount of oil injected, thus enabling continuous filling and preventing overfilling. Both the oil tank 1 and the filling chamber 2 are made of 1 mm thick 2Cr13 stainless steel plates, welded together to form a sealed oil storage cavity, capable of withstanding harsh conditions. In the construction environment, to improve the service strength and lifespan of oil tank 1 and filling tank 2, filling tank 2 is fixedly connected to the bottom end of oil tank 1 and is connected to oil tank 1, allowing oil added to oil tank 1 to be stored in filling tank 2. A hollow channel 3 is provided at the longitudinal center position of filling tank 2 and oil tank 1. The hollow channel 3 can ensure that the polished rod slides in the hollow channel 3. Multiple oil injection holes 4 are provided, and multiple oil injection holes 4 are opened on the inner wall of filling tank 2. The oil stored in filling tank 2 can be injected into the hollow channel 3 through multiple oil injection holes 4, so as to lubricate the polished rod around the circumference and provide uniform lubrication to the polished rod. The refueling mechanism is located on one side of the oil tank 1 and is used to introduce lubricating oil into the oil tank 1. The push plate 5 is rotated and installed in the filling chamber 2 through the rotating mechanism. Multiple side walls of the push plate 5 are in contact with the inner walls of the corresponding oil tank 1 and filling chamber 2. The rotating mechanism is used to drive the push plate 5 to rotate around the hollow channel 3 in the filling chamber 2 and push the oil out through the oil outlet. The observation mechanism is located on the other side of the oil tank 1 and is used to observe the oil reserve inside the oil tank 1.

[0036] The refueling mechanism includes a refueling pipe 6, a top cover 7, and a drain pipe 8. The refueling pipe 6 is equipped with a filter screen 17 to filter impurities in the oil. Since the manhole cover packing box is typically used outdoors, when the top cover is open, impurities from the external environment can easily enter the oil reservoir 1 along with the oil during refueling, potentially causing leakage at the oil filling hole 4. Therefore, the filter screen 17 is necessary to intercept impurities from both the external environment and the oil during the refueling process, thereby reducing the entry of impurities and further preventing leakage at the oil filling hole 4. The filling pipe 6 is connected to one side of the oil tank 1. The top cover 7 is fastened to the top of the filling pipe 6. The drain pipe 8 is connected to the bottom of the oil tank 1. The bottom of the drain pipe 8 is equipped with a bottom cover 9 that can seal the drain pipe 8. When the oil stored in the oil tank 1 is low and needs to be refilled, the operator needs to open the top cover 7 and refill the oil tank 1 through the filling pipe 6. After the oil tank 1 has been used for a long time, there will inevitably be oil stains or impurities on the inner bottom wall of the oil tank 1. At this time, the operator opens the bottom cover 9 to facilitate the discharge of oil stains or impurities at the bottom of the oil tank 1.

[0037] The rotating mechanism includes a gear ring 10, a rotating rod 12, and a motor 14. The gear ring 10 is rotatably connected to the inner bottom wall of the oil tank 1. A support ring 18 is fixedly connected to the inner bottom wall of the oil tank 1. The inner wall of the gear ring 10 rotates on the outer circumferential surface of the support ring 18, which can increase the stability of the gear ring 10 during rotation. A through groove 11 is provided on the push plate 5. One side of the gear ring 10 is located in the through groove 11, and the gear ring 10 is fixedly connected to the inner wall of the through groove 11. The rotating rod 12 is rotatably connected to the bottom cover 9. A drive gear 13 is fixedly connected to the top end of the rotating rod 12. The drive gear 13 meshes with the gear ring 10. The motor 14 is installed at the bottom end of the bottom cover 9. The output end of the motor 14 passes through the bottom cover 9 and is fixedly connected to the rotating rod 12. The design of the motor 14 being installed on the bottom cover 9 allows the motor 14 to be removed at the same time as the bottom cover 9 is opened for draining the oil tank 1, which facilitates the maintenance of the motor 14 and the drive gear 13. When injecting oil into the hollow channel 3 through the oil injection hole 4, in order to increase the oil injection speed of the oil injection hole 4, the operator needs to start the motor 14. The motor 14 drives the rotating rod 12 to rotate. When the rotating rod 12 rotates, it drives the drive gear 13 to rotate. Since the drive gear 13 meshes with the gear ring 10, it drives the gear ring 10 to rotate. When the gear ring 10 rotates, it drives the push plate 5 to rotate in the filling chamber 2, thereby pushing the oil to move in the filling chamber 2 and pushing the oil towards the oil injection hole 4, which increases the oil injection speed of the oil injection hole 4. When the packing is sufficiently lubricated, the motor 14 can stop rotating and rely solely on the fluidity of the oil itself for oil injection, which can prevent the addition of too much oil and waste.

[0038] The observation mechanism includes a bent pipe 15 and a transparent plastic tube 16. There are two bent pipes 15, both of which are connected to the other side of the oil tank 1. The other ends of the two bent pipes 15 are opposite each other. The two ends of the transparent plastic tube 16 are respectively connected to the opposite ends of the two bent pipes 15. After the oil tank 1 is filled with oil, the operator can observe the remaining amount of oil in the oil tank 1 through the transparent plastic tube 16 during subsequent long-term use, which can help remind the operator to add oil to the oil tank 1 in time.

[0039] Working principle: When continuous lubrication of the packing box is required, the device is installed on the packing box. The smooth rod passes through the hollow channel 3 between the oil tank 1 and the filling chamber 2. Then, the operator opens the top cover 7 and adds oil to the oil tank 1 through the oil filling pipe 6. The oil added to the oil tank 1 flows into the filling chamber 2 until both oil tank 1 and filling chamber 2 are full. After that, the top cover 7 is closed. At this time, the oil in the filling chamber 2 will flow through multiple oil filling holes 4 to the space between the hollow channel 3 and the smooth rod. With the reciprocating movement of the smooth rod, the oil is carried to the packing. When performing lubrication for the first time, the lubrication effect can be improved by pushing the push plate 5. First, the operator needs to start the motor 14, which drives the rotation... The rotating rod 12 rotates, which drives the drive gear 13 to rotate. Since the drive gear 13 meshes with the gear ring 10, it drives the gear ring 10 to rotate. When the gear ring 10 rotates, it drives the push plate 5 to rotate in the filling chamber 2, thereby pushing the oil to move in the filling chamber 2. This pushes the oil towards the oil filling hole 4, increasing the oil filling speed of the oil filling hole 4. When the packing is sufficiently lubricated, the motor 14 can stop rotating, relying only on the oil's own fluidity for oil filling. This prevents the addition of too much oil and waste. After a long period of use, the operator can observe the remaining amount of oil in the oil tank 1 through the transparent plastic tube 16, which is convenient for reminding the operator to add oil to the oil tank 1 in time.

[0040] Additionally, it should be noted that after prolonged use, the inner bottom wall of oil tank 1 will inevitably accumulate oil stains or impurities. At this time, the operator can open the bottom cover 9 to facilitate the discharge of oil stains or impurities from the bottom of oil tank 1. Before discharging the oil stains and impurities, the motor 14 can be started to drive the drive gear 13 and the gear ring 10 to rotate. The rotation of the gear ring 10 causes the push plate 5 to rotate around the hollow channel 3, which can also scrape off the oil stains adhering to the inner wall of oil tank 1. During discharge, the operator removes the bottom cover 9 so that the scraped oil stains can be discharged through the discharge pipe 8. When removing the bottom cover 9, since the motor 14, rotating rod 12, and drive gear 13 are all mounted on the bottom cover 9, the motor 14, rotating rod 12, and drive gear 13 can also be removed simultaneously. After the oil stains or impurities have been discharged, the operator reinstalls the bottom cover 9 onto the discharge pipe 8. When reinstalling the bottom cover 9, the drive gear 13 can be re-engaged with the gear ring 10.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated oil lubrication chamber device for a wellhead packing box, comprising an oil tank (1), characterized in that, Also includes: The filling chamber (2) is fixedly connected to the bottom end of the oil tank (1) and the filling chamber (2) is connected to the oil tank (1). A hollow channel (3) is provided at the longitudinal center position of the filling chamber (2) and the oil tank (1). The hollow channel (3) can ensure that the light rod slides in the hollow channel (3). Oil injection holes (4) are provided in multiple ways, and all of the multiple oil injection holes (4) are opened on the inner wall of the filling chamber (2); A refueling mechanism is provided on one side of the oil tank (1) for introducing lubricating oil into the oil tank (1); Push plate (5), the push plate (5) is rotatably disposed in the filling chamber (2) by a rotating mechanism, the multiple side walls of the push plate (5) respectively contact the inner wall of the corresponding oil tank (1) and the inner wall of the filling chamber (2), the rotating mechanism is used to drive the push plate (5) to rotate around the hollow channel (3) in the filling chamber (2) and push the oil out through the oil outlet hole; The refueling facilities include: A refueling pipe (6) is connected to one side of the oil tank (1); Top cover (7), which is fastened to the top of the refueling pipe (6); Discharge pipe (8), the discharge pipe (8) is connected to the bottom end of the oil tank (1), and the bottom end of the discharge pipe (8) is equipped with a bottom cover (9) that can seal the discharge pipe (8). The rotating mechanism includes: A toothed ring (10) is rotatably connected to the inner bottom wall of the oil tank (1). A through groove (11) is provided on the push plate (5). One side of the toothed ring (10) is located in the through groove (11), and the toothed ring (10) is fixedly connected to the inner wall of the through groove (11). A rotating rod (12) is rotatably connected to the bottom cover (9), and a drive gear (13) is fixedly connected to the top end of the rotating rod (12), which meshes with the gear ring (10). The motor (14) is installed at the bottom end of the bottom cover (9), and the output end of the motor (14) passes through the bottom cover (9) and is fixedly connected to the rotating rod (12); A support ring (18) is fixedly connected to the inner bottom wall of the oil tank (1), and the toothed ring (10) is rotatably connected to the circumferential surface of the support ring (18). An observation mechanism is provided on the other side of the oil tank (1) for observing the oil reserves inside the oil tank (1).

2. The integrated oil lubrication chamber device for a wellhead packing box according to claim 1, characterized in that, The observation mechanism includes: Two bends (15) are provided, and both bends (15) are connected to the other side of the oil tank (1), with the other ends of the two bends (15) facing each other; A transparent plastic tube (16) is provided, with both ends of the transparent plastic tube (16) connected to the opposite ends of the two bent tubes (15).

3. The integrated oil lubrication chamber device for a wellhead packing box according to claim 1, characterized in that, The refueling pipe (6) is equipped with a filter screen (17) that can filter impurities in the oil.

4. The integrated oil lubrication chamber device for a wellhead packing box according to claim 1, characterized in that, Multiple oil injection holes (4) are evenly distributed on the inner wall of the filling chamber (2), and the diameter of each of the multiple oil injection holes (4) does not exceed one millimeter.

5. The integrated oil lubrication chamber device for a wellhead packing box according to claim 1, characterized in that, Both the oil tank (1) and the filling tank (2) are made of 1 mm thick 2Cr13 stainless steel plates and are welded together to form a closed oil storage cavity.

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