Self-lubricating packing box

Abstract

The invention discloses a self-lubricating packing box, and relates to the technical field of oil well packing boxes, and the self-lubricating packing box is characterized in that a lubricating medium is stored in a storage chamber, and the storage chamber is communicated with the top of a polish rod channel in a packing box body; the lubricating unit is in signal connection with the controller, a filling instruction is stored in the controller, the filling instruction enables the controller to regularly transmit a first signal to the lubricating unit, the first signal enables the lubricating unit to apply a first acting force to the lubricating medium in the storage chamber, and the first acting force enables the lubricating medium to move towards the top of the polish rod channel; a set amount of lubricating medium is input into the polish rod channel; the lubricating medium is injected into the polish rod channel from top to bottom from the top of the polish rod channel, full lubrication between the polish rod and the packing box is achieved, and abrasion between the polish rod and the packing box is reduced; through cooperation of the controller and the lubricating unit, sufficient lubricating media can be input into the polish rod channel, and therefore the cost consumed for filling the lubricating media is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil well packing boxes, in particular to a self-lubricating packing box. Background Art

[0002] The packing box of the pumping well seals the pumping rod. For the method of using the oil produced by the pumping well to lubricate the packing box, when the production of the pumping well is insufficient or the fluid is discharged intermittently, dry grinding will occur between the packing box and the pumping rod due to insufficient lubrication, causing the sealing packing in the packing box to heat up and be damaged, and oil leakage.

[0003] In order to avoid the above situation, patrol personnel are often arranged to manually apply lubricating oil to the pumping rod for lubrication. Although this method can solve the problem of dry grinding, it inevitably has the following disadvantages: First, according to the current liquid discharge of northern oil wells, patrol personnel need to go to the site to apply butter almost every day, which wastes a lot of manpower and time and is inefficient; second, when encountering extreme weather such as rain and snow, personnel cannot arrive at the site on time, which may easily lead to untimely application or missing application; third, when patrol personnel manually apply lubricating oil, it is easy to cause dry grinding between the packing box and the pumping rod due to insufficient lubricating oil, or excessive lubricating oil may cause the lubricating oil to overflow from the packing box, resulting in waste of lubricating oil.

[0004] Therefore, how to ensure that the packing box and the oil pumping polished rod can be fully lubricated while reducing the cost of achieving full lubrication between the packing box and the oil pumping polished rod has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a self-lubricating packing box, so as to reduce the cost of achieving sufficient lubrication between the packing box and the oil pumping polished rod while ensuring that the packing box and the oil pumping polished rod are fully lubricated.

[0006] To achieve the above object, the present invention provides the following solutions: The present invention provides a self-lubricating packing box, which comprises: A storage chamber, wherein a lubricating medium is stored in the storage chamber, and the storage chamber is connected to the top end of the polished rod passage in the packing box body; A lubrication unit and a controller, wherein the lubrication unit is connected to the controller signal, and a filling instruction is stored in the controller, wherein the filling instruction enables the controller to periodically transmit a first signal to the lubrication unit, and the first signal enables the lubrication unit to apply a first force to the lubricating medium in the storage chamber, and the first force enables the lubricating medium to move toward the light rod channel and input a first set amount of the lubricating medium into the light rod channel.

[0007] Preferably, the self-lubricating packing box comprises a sealing unit provided at the storage chamber; The lubrication unit comprises: A first shell, wherein the first shell has a cavity therein, and the first shell is provided with a first inlet and a first outlet connected to the cavity, the first inlet is connected to a first medium source, a first one-way sealing unit is provided at the first inlet, and the first one-way sealing unit is used to prevent foreign matter from entering the storage chamber from the first inlet, the first outlet is connected to the storage chamber, and a second one-way sealing unit is provided at the first outlet, and the second one-way sealing unit is used to prevent the lubricating medium from entering the cavity from the first outlet; Drive components; When the self-lubricating packing box is in a filling state, the first medium source delivers a second set amount of the first medium into the cavity, the driving component applies a first force to the first medium, the first force causes a third set amount of the first medium to enter the storage chamber, and the first medium applies the first force to the lubricating medium, causing the first set amount of the lubricating medium to enter the polished rod channel; Wherein, the first medium and the lubricating medium are independently arranged.

[0008] Preferably, the driving assembly comprises a first driving member, the first driving member is drivingly connected to a cam, and the first driving member is used to drive the cam to rotate; A first push plate and a first reset member are provided in the cavity, the first push plate is located on a side of the cam close to the storage chamber, the first push plate and the first shell are slidably matched in a first direction, the first direction is a direction from the cavity toward the storage chamber, the first reset member applies a second force toward the cam to the first push plate, and the second force causes the first push plate to abut against the cam; When the self-lubricating packing box is in the filling state, the first driving member drives the cam to rotate, and the cam applies a third force to the first push plate, and the third force causes the first push plate to move toward and away from the storage chamber. The cam applies the first force to the lubricating medium through the first medium, and causes a first set amount of the lubricating medium to enter the polished rod channel.

[0009] Preferably, the drive assembly includes a second push plate disposed in the cavity, and a second drive member transmission-connected to the second push plate, and when the self-lubricating packing box is in the filling state, the second drive member is used to drive the second push plate to move toward and away from the storage chamber, and the second push plate applies the first force to the lubricating medium through the first medium, and allows the first set amount of the lubricating medium to enter the light rod channel.

[0010] Preferably, the first medium source constitutes the driving assembly, and when the self-lubricating packing box is in the filling state, the first medium source applies the first force to the lubricating medium and allows a first set amount of the lubricating medium to enter the polished rod channel.

[0011] Preferably, the first one-way sealing unit comprises a first sealing member disposed at the first inlet, and a second restoring member connected to the first sealing member, the first sealing member is located at a side of the second restoring member close to the first inlet, the second restoring member applies a fourth force to the first sealing member, the fourth force causes the second restoring member to block the first inlet, and the force applied by the first medium source to the first medium is greater than the fourth force; Alternatively, the first one-way sealing unit includes a first valve disposed at the first inlet, and before the second set amount of the first medium is injected into the cavity, the first valve remains open, and after the second set amount of the first medium is injected into the cavity, the controller transmits a second signal to the first valve, and the second signal causes the first valve to close; Alternatively, the first one-way sealing unit includes a first one-way valve disposed at the first inlet, and a communication direction of the first one-way valve is set from a direction away from the cavity toward a direction close to the cavity.

[0012] Preferably, the second one-way sealing unit comprises a second sealing member disposed at the first outlet, and a third restoring member connected to the second sealing member, the third restoring member being located at a side of the second sealing member close to the storage chamber, the third restoring member applying a fifth force to the second sealing member, the fifth force causing the second sealing member to block the first outlet, and the first force being greater than the fifth force; Alternatively, the second one-way sealing unit includes a second valve disposed at the first outlet, and before a second set amount of the first medium is injected into the cavity, the second valve remains closed, and after the second set amount of the first medium is injected into the cavity and before a third set amount of the first medium is injected into the storage chamber, the controller transmits a third signal to the second valve, and the third signal causes the second valve to open; Alternatively, the second one-way sealing unit includes a second one-way valve disposed at the first outlet, and a communication direction of the second one-way valve is set from a direction close to the cavity to a direction away from the cavity.

[0013] Preferably, the storage chamber and the polished rod channel are connected via an input pipeline; Wherein, the lubrication unit comprises a delivery pump arranged on the input pipeline, and a first flow meter arranged on the input pipeline. When the self-lubricating packing box is in a filling state, the filling instruction causes the controller to turn on the delivery pump. After the first flow meter detects that the storage chamber outputs a first set amount of the lubricating medium to the polished rod channel, the first flow meter inputs a fourth signal to the controller, and the fourth signal causes the controller to turn off the delivery pump. Alternatively, the storage chamber is located above the polished rod channel, the lubrication unit includes a third valve provided on the input pipeline, and a second flow meter provided on the input pipeline, when the self-lubricating packing box is in a filling state, the filling instruction causes the controller to open the third valve, after the second flow meter detects that the storage chamber outputs a first set amount of the lubricating medium to the polished rod channel, the second flow meter inputs a fifth signal to the controller, and the fifth signal causes the controller to close the third valve; Alternatively, the lubrication unit includes a fourth valve arranged on the input pipeline, a third flowmeter arranged on the input pipeline, and a third push plate arranged in the storage chamber, the third push plate is transmission-connected to a third drive member, and when the self-lubricating packing box is in a filling state, the first signal causes the controller to open the fourth valve, and causes the third drive member to apply a sixth force to the third push plate, and the sixth force causes the third push plate to be pushed toward the direction close to the light rod channel. After the third flowmeter detects that the storage chamber outputs the first set amount of the lubricating medium to the light rod channel, the third flowmeter inputs a sixth signal to the controller, and the sixth signal causes the controller to close the third drive member and the fourth valve.

[0014] Preferably, the storage chamber has a first visible window, and the packing box body has a second visible window; the self-lubricating packing box also includes an oil extraction polished rod arranged in the polished rod channel, and a scraper is provided on the oil extraction polished rod.

[0015] Preferably, a relief valve is provided at the top of the polished rod channel, and the relief valve is connected to the storage chamber through a loop, and a circulation pump and a filter are provided on the loop; A liquid level meter is provided in the storage chamber, and a flow sensor is provided in the light rod channel. The liquid level meter and the flow sensor are both connected to the controller signal, and the controller signal is connected to an alarm. When the liquid level meter detects that the liquid level of the lubricating medium in the storage chamber is lower than a set value, the liquid level meter sends a seventh signal to the controller, and the seventh signal enables the controller to activate the alarm, and / or when the flow sensor detects that the flow of the lubricating medium in the light rod channel is lower than a set value, the flow sensor sends an eighth signal to the controller, and the eighth signal enables the controller to activate the alarm.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: The self-lubricating packing box in the present invention includes a storage chamber, in which a lubricating medium is stored, the storage chamber is connected to the top of the polished rod channel in the packing box body, the lubrication unit is connected to the controller signal, and the controller stores a filling instruction, the filling instruction enables the controller to periodically transmit a first signal to the lubrication unit, the first signal enables the lubrication unit to apply a first force to the lubricating medium in the storage chamber, the first force enables the lubricating medium to move toward the direction of the polished rod channel, and inputs a first set amount of lubricating medium into the polished rod channel; based on the above content, it can be known that ① the present invention injects the lubricating medium into the polished rod channel from top to bottom at the top of the polished rod channel, which alleviates the problem that the lubricating medium is injected from the side of the polished rod channel, resulting in the lubricating medium being difficult to reach the area above the injection port on the side of the polished rod channel, and the lubricating medium cannot be evenly distributed in the polished rod channel, so that the lubricating medium can be more evenly dispersed in the polished rod channel ① The present invention realizes sufficient lubrication between the bare rod and the packing box body, and reduces the wear between the bare rod and the packing box; ② The present invention can input a sufficient amount of lubricating medium into the bare rod channel through the cooperation of the controller and the lubrication unit, which alleviates the problem of wear between the packing box and the bare rod caused by insufficient lubricating medium in the bare rod channel, and also reduces the problem of excessive lubricating medium in the bare rod channel, which causes the lubricating medium to overflow the bare rod channel and increase the lubrication cost; at the same time, after adopting the self-lubricating packing box of the present invention, the lubricating medium can be automatically added regularly between the packing box and the bare rod, which saves the step of frequent on-site inspection personnel to add lubricating medium, and further reduces the cost of adding lubricating medium; in short, the present invention not only realizes sufficient lubrication between the packing box and the bare rod, but also reduces the cost of achieving sufficient lubrication between the packing box and the bare rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a self-lubricating packing box; Figure 2 It is a structural schematic diagram of the lubrication unit; Figure 3 It is a structural diagram of the cam; Among them, 1. lower joint; 2. oil; 3. shell; 4. rotating body; 5. sealing block; 6. packing box body; 7. pressing sleeve; 8. handle; 9. pressing cap; 10. storage chamber; 11. end cover; 12. lubrication unit; 13. first drive member; 14. controller; 15. power generation assembly; 101. first cover plate; 102. first shell; 103. cam; 104. first push plate; 105. second reset member; 106. first sealing member; 107. second cover plate; 108. first reset member; 109. second sealing member; 110. third reset member. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1~Figure 3 As shown, the present invention discloses a self-lubricating packing box, which includes a storage chamber 10, in which a lubricating medium is stored, and the storage chamber 10 is connected to the top of the light rod channel in the packing box body 6; a lubricating unit 12 and a controller 14, and the lubricating unit 12 is connected to the controller 14 by signal, and the controller 14 stores a filling instruction, and the filling instruction enables the controller 14 to regularly transmit a first signal to the lubricating unit 12, and the first signal enables the lubricating unit 12 to apply a first force to the lubricating medium in the storage chamber 10, and the first force enables the lubricating medium to move toward the top of the light rod channel and input a first set amount of lubricating medium into the light rod channel.

[0022] Based on the above content, it can be known that ① the present invention injects the lubricating medium into the light rod channel from top to bottom at the top of the light rod channel, which alleviates the problem that the lubricating medium is injected from the side of the light rod channel, resulting in the lubricating medium being difficult to reach the area above the injection port on the side of the light rod channel, and the lubricating medium cannot be evenly distributed in the light rod channel, so that the lubricating medium can be more evenly dispersed between the light rod and the packing box body 6, thereby achieving sufficient lubrication between the light rod and the packing box and reducing the wear between the light rod and the packing box; ② the present invention can input a sufficient amount of lubricating medium into the light rod channel through the cooperation of the controller 14 and the lubrication unit 12, which alleviates the problem that the light rod channel The self-lubricating packing box of the present invention can automatically and regularly add lubricating medium to the space between the packing box and the oil pumping polished rod, thus eliminating the need for inspection personnel to frequently go to the site to add lubricating medium, and further reducing the cost of adding lubricating medium. In short, the present invention not only achieves sufficient lubrication between the packing box and the oil pumping polished rod, but also reduces the cost of achieving sufficient lubrication between the packing box and the oil pumping polished rod.

[0023] The self-lubrication in the self-lubricating packing box means that the controller 14 in the present invention can start the lubrication unit 12 regularly according to the filling instructions input by the operator, and fill the first set amount of lubricating medium into the light rod channel. The packing box body 6 corresponds to the packing box in the prior art. The lubricating medium can specifically be a medium such as lubricating oil that can lubricate the contact between the packing box and the oil-pumping light rod. The controller 14 can specifically be a PC remotely connected to the lubrication unit 12. The controller 14 includes an input unit for receiving instructions for modifying the filling frequency and single filling amount of the lubrication unit 12, and the input unit can specifically be an input panel or an input interface. The first set amount of lubricating medium means that after the volume of lubricating medium is injected into the light rod channel, the volume of lubricating medium can fully lubricate the oil-pumping light rod and the packing box body 6, and will not overflow from the light rod channel.

[0024] The lubrication unit 12 in the present invention has a variety of settings. For example, the self-lubricating packing box includes a sealing unit arranged at the storage chamber 10, the sealing unit is used to ensure the sealing of the storage chamber 10, and the sealing unit can be a sealing ring arranged at the inlet or outlet of the storage chamber 10. The lubrication unit 12 includes a first shell 102, the first shell 102 has a cavity, the first shell 102 is provided with a first inlet and a first outlet connected to the cavity, the first inlet is connected to the first medium source, the first outlet is connected to the storage chamber 10, a first one-way sealing unit is provided at the first inlet, the sealing direction of the first one-way sealing unit is set from the direction close to the cavity to the direction away from the cavity, and the first outlet is provided at the first outlet. A second one-way sealing unit is provided, and the sealing direction of the second one-way sealing unit is set from the direction away from the cavity to the direction close to the cavity; a driving component; when the self-lubricating packing box is in a filling state, the first medium source conveys a second set amount of the first medium into the cavity under the external force, and the driving component applies a first force to the first medium, and the first force causes the third set amount of the first medium to enter the storage chamber 10, and the first medium applies a first force to the lubricating medium, so that the first set amount of the lubricating medium enters the light rod channel; wherein the first medium and the lubricating medium are independently set, and the first force is set from the cavity toward the storage chamber 10. The self-lubricating packing box is in a filling state, which means that the filling instruction causes the controller 14 to send a first signal to the lubrication unit 12. The first shell 102 is not limited to a cylindrical shell 3, and a shell 3 of other shapes such as a rectangular parallelepiped can also be used, as long as the setting of the first shell 102 does not affect the realization of other functions in this article.

[0025] The present invention pushes the lubricating medium toward the direction of the polished rod channel through a first medium independently provided from the lubricating medium, thereby reducing the problem of pushing the lubricating medium through structures such as a push plate, which contaminates the lubricating medium and reduces the lubrication effect.

[0026] The sealing unit ensures the sealing of the storage chamber 10, so that the lubricating medium in the storage chamber 10 is not easy to leak, and the storage chamber 10 can maintain a sealed state. The first one-way sealing unit and the second one-way sealing unit respectively ensure the one-way sealing at the first inlet and the first outlet, so that the first medium is not easy to flow from the cavity to the outside of the cavity, and the lubricating medium is not easy to flow from the storage chamber 10 to the cavity. When the lubricating unit 12 includes a driving component, a first signal is sent to the driving component to start the driving component, so that the driving component applies a first force to the second set amount of the first medium, and the first medium then applies the first force to the lubricating medium, so that the first set amount of the lubricating medium is input into the polished rod channel.

[0027] The first medium source may specifically be a device that can actively or passively provide the first medium into the cavity. The first medium is independent of the lubricating medium, which means that the first medium will not destroy the lubricating function of the lubricating medium between the packing box body 6 and the oil pumping rod. The first medium may specifically be a gas such as nitrogen that does not react with the lubricating medium, or the first medium may also be a liquid that does not destroy the lubricating function of the lubricating medium, or, if the working conditions require, even a gas-liquid mixture that does not destroy the lubricating function of the lubricating medium may be selected as the first medium; the specific selection of the first medium of gas type, liquid type, or gas-liquid mixture type depends on the working conditions.

[0028] It should be noted that, affected by factors such as the sealing state of the first shell 102 and the storage chamber 10, and the viscosity of the first medium and the lubricating medium, the first set amount of the first set amount of the lubricating medium, the second set amount of the first medium in the second set amount, and the third set amount of the first medium in the third set amount, the three values ​​are not necessarily the same. For example, if the viscosity of the first medium and the lubricating medium is not considered, and the sealing state of the first shell 102 and the storage chamber 10 is good, at this time, because the first shell 102 has good sealing, the first medium input into the cavity will not overflow the cavity and can completely enter the storage chamber 10, then the third set amount is the same as the second set amount, and the storage chamber 10 has good sealing, so the first set amount and the second set amount are the same; on the contrary, if the sealing of the first shell 102 is poor, when the first medium is pushed toward the storage chamber 10, part of the first medium may leak from the cavity, at this time, a first medium greater than the third set amount needs to be input into the cavity before the second set amount of the first medium can be input into the storage chamber 10, at this time, the second set amount is greater than the third set amount.

[0029] When the first medium source constitutes the driving component, the first medium source is a device that actively provides the first medium into the cavity. At this time, the controller 14 sends a first signal to the first medium source, and the first medium source applies a first force to the lubricating medium, so that the third set amount of the first medium enters the storage chamber 10. At this time, the first medium source specifically includes a storage box storing the first medium, the storage box is connected to the cavity through a pipeline, a valve for controlling the on-off of the pipeline is provided on the pipeline, and a booster delivery component that can deliver the first medium from the storage box to the cavity and can increase the pressure of the first medium so that the pressure of the first medium can apply a first force to the lubricating medium. The booster delivery component can specifically be a booster pump. According to the type of the first medium, a gas booster pump or a liquid booster pump is selected, or, when the first medium is a gas, the booster delivery component includes a pump and an air compressor. At this time, when the filling instruction causes the controller 14 to transmit the first signal to the lubrication unit 12, the first signal causes the valve to open and the boost delivery component to start. The boost delivery component injects the pressurized, second set amount of the first medium into the cavity from the first inlet, and the third set amount of the first medium enters the storage chamber 10 from the first outlet, pushing the lubricating medium in the direction of the light rod channel, so that the first set amount of the lubricating medium can enter the light rod channel, so that the oil pumping light rod and the packing box body 6 can be fully lubricated, and the lubricating medium will not overflow and be wasted due to excessive filling.

[0030] Alternatively, when the first medium source does not constitute a driving component, the first medium source can be a device that actively provides the first medium into the cavity, such as the structure described in the previous paragraph; or, the first medium source can also be a structure that passively inputs the first medium into the cavity under the action of the driving component. For example, the first medium source can be the outside atmosphere connected to the cavity, or the first medium source can be a storage box that stores the first medium, and the storage box is connected to the first inlet through a pipeline. At this time, the pressure in the cavity is changed by the movement of the driving component, so that the second set amount of the first medium is first pressed into the cavity under the action of the pressure difference, and then pressed into the storage chamber 10.

[0031] When the first medium source does not constitute a driving assembly, the driving assembly may include a first driving member 13, which is transmission-connected to a cam 103, and is used to drive the cam 103 to rotate; a first push plate 104 and a first reset member 108 are provided in the cavity, and the first push plate 104 is located on a side of the cam 103 close to the storage chamber 10, and the first push plate 104 and the first shell 102 are slidably matched in a first direction, and the first direction is from the cavity toward the storage chamber 10, and the first reset member 108 applies a force toward the cam 103 to the first push plate 104. The second force causes the first push plate 104 and the cam 103 to abut against each other; when the self-lubricating packing box is in a filling state, if the first medium source is a device that actively supplies the first medium into the cavity, the controller 14 sends a first signal to the first medium source and the first driving member 13 in sequence: first start the first medium source, and after the first medium source supplies a second set amount of the first medium into the cavity, the controller 14 starts the first driving member 13, and the first driving member 13 drives the cam 103 to rotate, so that the cam 103 applies a third force to the first push plate 104, and the third The force causes the first push plate 104 to move toward the storage chamber 10, the third force is greater than the force applied by the first medium source to the first medium, and causes the third set amount of the first medium to enter the storage chamber 10, and injects the first set amount of the first medium into the light rod channel; accordingly, if the first medium source is a device that passively supplies the first medium into the cavity under the action of the driving component, the controller 14 sends a first signal to the first driving member 13: first start the first driving member 13, so that the first driving member 13 rotates in the positive direction, and the third force causes the first push plate 104 to move toward the storage chamber 10, and the third force causes the first push plate 104 to move toward the storage chamber 10, and the third force causes the first medium to enter the storage chamber 10, and injects the first set amount of the first medium into the light rod channel; accordingly, if the first medium source is a device that passively supplies the first medium into the cavity under the action of the driving component, the controller 14 sends a first signal to the first driving member 13: first start the first driving member 13, so that the first driving member 13 rotates in the positive direction, and the third force causes the first push plate 104 moves in the direction away from the storage chamber 10. At this time, the cavity space becomes larger and the pressure becomes smaller. The first medium moves into the cavity under the action of the pressure difference, so that the second set amount of the first medium enters the cavity. Subsequently, the first driving member 13 rotates in the reverse direction of the positive direction. The third force causes the first push plate 104 to move in the direction close to the storage chamber 10, and then pushes the third set amount of the first medium into the storage chamber 10. The first medium applies a first force to the lubricating medium in the storage chamber 10, and the first force causes the first set amount of the lubricating medium to enter the light rod channel.

[0032] The displacement difference between the high point and the low point of the cam 103 is the distance that the first push plate 104 moves in the cavity, and the first medium within the distance range is the second set amount of the first medium. In addition to being able to slide with the first housing 102 in the axial direction of the first housing 102, the first push plate 104 can also slide with the first housing 102 in other directions of the first housing 102 to ensure that the first push plate 104 can move away from and close to the storage chamber 10, and the cam 103 can be arranged parallel to the first push plate 104 and can also be arranged tilted relative to the first push plate 104, as long as the first driving member 13 drives the cam 103 to rotate and can drive the first push plate 104 to move toward and away from the storage chamber 10.

[0033] Furthermore, when the driving assembly does not adopt the cam 103 structure, the driving assembly includes a second push plate arranged in the cavity, and a second driving member transmission-connected to the second push plate. When the self-lubricating packing box is in a filling state, the second driving member is used to drive the second push plate to move toward and away from the storage chamber 10. The second push plate applies a first force to the lubricating medium through the first medium, and allows a first set amount of lubricating medium to enter the light rod channel. When the self-lubricating packing box is in a filling state, if the first medium source is a device that actively supplies the first medium into the cavity, the controller 14 sends a first signal to the first medium source and the first driving member 13 in sequence: first start the first medium source, and after the first medium source supplies the second set amount of the first medium into the cavity, the controller 14 starts the second driving member, and the second driving member applies a first force to the second push plate, and the first force is greater than the force applied to the first medium by the first medium source. The first force causes the first push plate 104 to move toward the storage chamber 10, and causes the third set amount of the first medium to enter the storage chamber 10, and then causes the first set amount of the lubricating medium to enter the light rod channel; accordingly, if the first medium The mass source is a device that passively supplies the first medium into the cavity under the action of the driving component, and the controller 14 sends a first signal to the first driving member 13: first start the second driving member, so that the second driving member drives the second push plate to move in the direction away from the storage chamber 10. At this time, the cavity space becomes larger and the pressure becomes smaller. The first medium moves into the cavity under the action of the pressure difference, so that the second set amount of the first medium enters the cavity. Subsequently, the first driving member 13 moves in the direction close to the storage chamber 10, and then pushes the third set amount of the first medium into the storage chamber 10. The first medium applies a first force to the lubricating medium in the storage chamber 10, and the first force causes the first set amount of the lubricating medium to enter the light rod channel.

[0034] Moreover, the first one-way sealing unit and the second one-way sealing unit in the present invention have a variety of settings: for example, the first one-way sealing unit includes a first sealing member 106 disposed at the first entrance, and a second reset member 105 connected to the first sealing member 106, the first sealing member 106 is located on a side of the second reset member 105 close to the first entrance, the second reset member 105 applies a fourth force to the first sealing member 106, the fourth force causes the second reset member 105 to block the first entrance, and the force applied by the first medium source to the first medium is greater than the fourth force; or, the first one-way sealing unit includes a first sealing member 106 disposed at the first entrance, and a second reset member 105 connected to the first sealing member 106 is provided at the first entrance, and the second reset member 105 applies a fourth force to the first sealing member 106, and the fourth force causes the second reset member 105 to block the first entrance, and the force applied by the first medium source to the first medium is greater than the fourth force; or The sealing unit includes a first valve arranged at a first inlet. Before a second set amount of the first medium is injected into the cavity, the first valve remains open. After the second set amount of the first medium is injected into the cavity, the controller 14 transmits a second signal to the first valve, and the second signal causes the first valve to close. At this time, the connection between the first medium source and the cavity is disconnected by closing the first valve, thereby realizing the one-way sealing of the first one-way sealing unit; or, the first one-way sealing unit includes a first one-way valve arranged at a first inlet, and the connection direction of the first one-way valve is set from a direction away from the cavity to a direction close to the cavity.

[0035] The second one-way sealing unit includes a second sealing member 109 arranged at the first outlet, and a third reset member 110 connected to the second sealing member 109, the third reset member 110 is located on the side of the second sealing member 109 close to the storage chamber 10, the third reset member 110 applies a fifth force to the first sealing member 106, the fifth force causes the second sealing member 109 to block the first outlet, and the first force is greater than the fifth force; or, the second one-way sealing unit includes a second valve arranged at the first outlet, before the second set amount of the first medium is injected into the cavity, the second valve remains closed, after the second set amount of the first medium is injected into the cavity and before the third set amount of the first medium is injected into the storage chamber 10, the controller 14 transmits a third signal to the second valve, and the third signal causes the second valve to open; or, the second one-way sealing unit includes a second one-way valve arranged at the first outlet, and the connection direction of the second one-way valve is set from the direction close to the cavity to the direction away from the cavity.

[0036] The first reset member 108, the second reset member 105, and the third reset member 110 can be specifically a spring or other elastic structure that can output a corresponding force. The first seal 106 and the second seal 109 can be specifically a sealing ball, a sealing plate, or a sealing block 5 or other structures that can achieve a corresponding sealing effect. The first drive member 13 can be specifically a rotating motor, an electric motor, or other equipment that can drive the cam 103 to rotate, and the second drive member and the third drive member can be specifically an electric push rod, a cylinder, or a hydraulic cylinder, etc., which can respectively drive the second push plate and the third push plate to move linearly. It should be noted that no matter what kind of equipment the first drive member, the second drive member, and the third drive member are specifically, they must be able to achieve the function of regularly and quantitatively adding lubricating medium to the light rod channel through cooperation with the controller and / or the cam; the first signal to the seventh signal are specifically control signals input to the corresponding equipment by the controller 14 through the signal connection line.

[0037] The storage chamber 10 is connected to the polished rod channel through an input pipeline; wherein the lubrication unit 12 includes a delivery pump arranged on the input pipeline, and a first flow meter arranged on the input pipeline. When the self-lubricating packing box is in a filling state, the filling instruction causes the controller 14 to start the delivery pump. After the first flow meter detects that the storage chamber 10 outputs a first set amount of lubricating medium to the polished rod channel, the first flow meter inputs a fourth signal to the controller 14, and the fourth signal causes the controller 14 to turn off the delivery pump; or, the storage chamber 10 is located above the polished rod channel, the lubrication unit 12 includes a third valve arranged on the input pipeline, and a second flow meter arranged on the input pipeline. When the self-lubricating packing box is in a filling state, the filling instruction causes the controller 14 to open the third valve. After the second flow meter detects that the storage chamber 10 outputs a first set amount of lubricating medium to the polished rod channel, the first flow meter inputs a fourth signal to the controller 14, and the fourth signal causes the controller 14 to turn off the delivery pump. After a set amount of lubricating medium is input, the second flowmeter inputs a fifth signal to the controller 14, and the fifth signal causes the controller 14 to close the third valve; or, the lubrication unit 12 includes a fourth valve arranged on the input pipeline, a third flowmeter arranged on the input pipeline, and a third push plate arranged in the storage chamber 10, and the third push plate is connected to the third driving member in a transmission manner. When the self-lubricating packing box is in a filling state, the first signal causes the controller 14 to open the fourth valve, and causes the third driving member to apply a sixth force to the third push plate, and the sixth force causes the third push plate to push in a direction close to the light rod channel. After the third flowmeter detects that the storage chamber 10 outputs a set amount of lubricating medium to the light rod channel, the third flowmeter inputs a sixth signal to the controller 14, and the sixth signal causes the controller 14 to close the third driving member and the third valve. The third driving member can be a linear driving device such as a cylinder or a hydraulic cylinder.

[0038] The storage chamber 10 has a first visual window, and the packing box body 6 has a second visual window, so that the inspection personnel can observe the storage chamber 10 and the storage chamber 10 and the light rod channel The storage and distribution state of the lubricating medium are respectively observed through the first visual window and the second visual window, so as to time the lubricating medium to be added when the device for detecting the lubricating medium residue fails; the self-lubricating packing box also includes an oil-pumping rod arranged in the light rod channel, and the oil-pumping rod is provided with a scraper, and the scraper is arranged along the circumference of the oil-pumping rod, so that when the oil-pumping rod is working, it can drive the scraper to move, and then stir the lubricating medium in the light rod channel, reducing the problem that the lubricating medium has a large viscosity and cannot be evenly distributed in the light rod channel; a filter is provided at the first inlet, which can filter the first medium entering the cavity to prevent external dust and other impurities from entering the cavity, or, when the first medium source is the external atmosphere, the first inlet can also be set small enough to allow gas to enter the cavity, while dust and other impurities cannot enter the cavity.

[0039] In addition, the present invention provides an overflow valve at the top of the polished rod channel, the overflow valve is connected to the storage chamber 10 through a loop, the loop is provided with a filter and a circulation pump, the lubricating medium that may overflow the polished rod channel can be input into the loop through the overflow valve, and the circulating medium filtered by the filter is transported to the storage chamber through the circulation pump for subsequent use, and the filter can be a filter structure such as a filter screen, a metal mesh filter element filter, a fiber filter element filter, etc. to remove impurities in the lubricating medium; a liquid level meter is provided in the storage chamber 10, and a flow sensor is provided in the polished rod channel, and the liquid level meter and the flow sensor are both connected to the controller 14 signal The controller 14 is connected to an alarm. When the level meter detects that the level of the lubricating medium in the storage chamber 10 is lower than the set value, the level meter sends a seventh signal to the controller 14, and the seventh signal causes the controller 14 to start the alarm, thereby reminding the inspection personnel to add the lubricating medium in time, and / or when the flow sensor detects that the flow of the lubricating medium in the light rod channel is lower than the set value, the flow sensor sends an eighth signal to the controller 14, and the eighth signal causes the controller 14 to start the alarm, thereby reminding the on-duty personnel to remotely control the controller 14 and start the lubrication unit 12 to add the lubricating medium to the light rod channel. The alarm can be a light alarm and / or a sound alarm.

[0040] Figure 1~Figure 3 The structure shown in the figure is one embodiment of the self-lubricating packing box in the present invention, but the specific structure of the self-lubricating packing box in the present invention is not limited to Figure 1~Figure 3 The structure shown in , the specific form can be found in the previous discussion. Figure 1~Figure 3In the embodiment, the self-lubricating packing box includes an open storage chamber 10, an end cover 11 is provided on the top of the storage chamber 10, the end cover 11 is detachably fixedly connected to the storage chamber 10, a sealing member such as a sealing ring is provided between the end cover 11 and the storage chamber 10, and the end cover 11 can be removed to add or replace the lubricating medium in the storage chamber 10, or the end cover 11 and the storage chamber 10 can be set as an integral structure, and a filling port connected to the storage chamber 10 is provided outside the storage chamber 10. Figure 1 As shown, the self-lubricating packing box also includes an oil extraction rod, on the outside of which are sequentially sleeved with a pressure cap 9, a pressure sleeve 7, a packing box body 6, a sealing block 5, a shell 3 and a lower joint 1 from top to bottom, a handle 8 is provided on the side of the pressure cap 9, a rotating body 4 is connected to the side of the sealing block 5, and an oil fitting 2 is provided outside the shell 3.

[0041] The side of the storage chamber 10 is connected to a first shell 102, the first shell 102 is a cylindrical shell 3, and a first outlet is provided at one end of the first shell 102 close to the storage chamber 10, the first outlet is connected to the storage chamber 10, a second sealing member 109 and a third reset member 110 are provided at the first outlet, the second sealing member 109 is a second sealing ball, the third reset member 110 is a third spring, the second sealing ball is located on the side of the third spring away from the first outlet, and a first cover plate 101 is provided at one end of the first shell 102 away from the storage chamber 10, the first The cover plate 101 is used to block the end of the first shell 102 away from the storage chamber 10 to prevent the entry of debris such as mud and sand. The top of the first shell 102 is provided with a second cover plate 107, and the second cover plate 107 is provided with an air inlet. The second cover plate 107 is arranged at the first entrance of the first shell 102, and the first entrance is provided with a first sealing member 106 and a first reset member 108. At this time, the first sealing member 106 is a first sealing ball, and the second reset member 105 is a second spring. The first sealing ball is located on the side of the second spring away from the cavity, and the sliding member in the cavity is A first push plate 104 is provided on the first push plate 104, and a seal (specifically, the seal can be a sealing ring) is provided on the first push plate 104, and the seal is located between the first push plate 104 and the cavity. The first push plate 104 is a plunger, and the plunger constitutes the first push plate 104. The plunger is arranged along the axial direction of the cavity, and a cam 103 is provided on the side of the plunger away from the second sealing ball. The cam 103 is transmission-connected with the first driving member 13, and a first reset member 108, i.e., a first spring, is provided on the plunger outer sleeve. The first spring makes the plunger abut against the cam 103. The first driving member 13 At this time, it is a motor, the first drive member 13 is connected to the controller 14 by signal, the first drive member 13 and the controller 14 are connected to a power supply, the controller 14, the first drive member 13 and other structures are connected to a power generation component 15, and the power generation component 15 is used to provide the first drive member 13, the controller 14 and other structures with the power required for operation. The power generation component 15 can specifically be a photovoltaic power generation component 15, a wind power generation component 15, a tidal power generation component 15 and other green energy power generation components 15. The power generation component 15 is a prior art, and the detailed structure is not repeated here.

[0042] According to the daily demand for lubricating medium at the installed wellhead, the corresponding value is input through the operation panel of the controller 14; after the background PLC automatically calculates, the number of times the first drive member 13 needs to operate every day can be calculated (it can be designed according to the plunger stroke, and 5 ml is added per operation as the base for calculation); at the same time, the time interval between each operation can be freely set. For example, the production rod of an oil well needs to add 80 ml of lubricating medium every day, and the first drive member 13 operates 16 times, and the operation time interval can be set to once every hour. In this case, 80 ml of lubricating medium will be added to the wellhead within a 16-hour period, so that the lubricating medium can be evenly added every day.

[0043] A limiter is provided on the rotating shaft of the first driving member 13 and on the side of the cam 103 away from the first driving member 13. The limiter can be a structure such as a retaining spring or a limiter plate that can prevent the cam 103 from detaching from the rotating shaft of the first driving member 13. The first medium source is the outside atmosphere.

[0044] When the filling instruction causes the controller 14 to send a first signal to the first driving member 13, the first driving member 13 drives the cam 103 to rotate, thereby driving the plunger to move axially, and under the action of the first spring, the plunger moves back and forth with the operation of the cam 103; because the plunger is also covered with a sealing member, a "micro air pump" is formed in the cavity (the micro air pump means that the plunger forms a seal with the cavity through the sealing member, which makes the plunger move in the direction away from the storage chamber 10. Negative pressure is formed in the cavity, the first sealing ball compresses the second spring to inhale, and the second sealing ball is sealed under the action of the third spring and the negative pressure. When the plunger moves forward, positive pressure is formed in the cavity, and the first sealing ball resets the seal under the action of the pressure and the second spring. The second sealing ball compresses the second spring under the pressure, and then the second sealing ball leaves the sealing surface, and the gas in the cavity is pressed into the storage chamber 10, and the plunger moves toward and The process of moving away from the storage chamber 10, that is, the process of inhaling and exhaling, thus forming a micro air pump or a micro air pump), when the plunger moves inward, the first sealing ball is pressed upward to seal, and the second sealing ball moves backward to release the seal, and the generated air pressure enters the storage chamber 10 through the first outlet, blowing the lubricating medium into the pressure cap 9 of the packing box; when the high point of the cam 103 is away from the end face of the plunger, under the action of the first spring, the plunger is pushed outward, at this time, the second sealing ball is sealed under the pressure of the third spring, and the first sealing ball moves downward under the action of negative pressure to release the seal, and air can enter the cavity through the air inlet hole of the second cover plate 107, avoiding air lock caused by vacuum extraction of the "air pump"; the first sealing ball and the second sealing ball play a one-way sealing role, which has the function of preventing external dust and rain from entering the first shell 102, and preventing the lubricating medium from flowing back into the cavity.

[0045] The self-lubricating packing box of the present invention is installed on the oil wellhead. In addition to the main performance of the packing box, it can realize automatic filling of the lubricating medium into the light rod channel through intelligent control, with stable performance and low maintenance cost. At the same time, since the device has low power, it adopts the power generation component 15 for power supply and storage, and is not connected to the on-site power supply, and the comprehensive energy consumption is low. In addition, according to the requirements of the site, the volume of the storage chamber 10 of the device can be changed, and the lubricating medium consumption for multiple months can be stored. According to the actual situation, the device can insulate the outside of the storage chamber 10 to prevent the lubricating medium from freezing in winter.

[0046] In the present invention, "and / or" refers to the same sentence, in which the text content before "and / or" and the text content after "and / or" can exist at the same time or separately; for example, "A and / or B" includes the situations in which A and B exist at the same time and only A or B exists.

[0047] The present invention discloses multiple technical solutions, but does not provide any contrary technical inspiration.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A self-lubricating packing box, characterized in that: The self-lubricating packing box comprises: A storage chamber, wherein a lubricating medium is stored in the storage chamber, and the storage chamber is connected to the top end of the polished rod passage in the packing box body; A lubrication unit and a controller, wherein the lubrication unit is connected to the controller signal, and a filling instruction is stored in the controller, wherein the filling instruction enables the controller to periodically transmit a first signal to the lubrication unit, and the first signal enables the lubrication unit to apply a first force to the lubricating medium in the storage chamber, and the first force enables the lubricating medium to move toward the light rod channel and input a first set amount of the lubricating medium into the light rod channel.

2. The self-lubricating packing box according to claim 1, characterized in that: The self-lubricating packing box includes a sealing unit disposed at the storage chamber; The lubrication unit comprises: A first shell, wherein the first shell has a cavity therein, and the first shell is provided with a first inlet and a first outlet connected to the cavity, the first inlet is connected to a first medium source, a first one-way sealing unit is provided at the first inlet, and the first one-way sealing unit is used to prevent foreign matter from entering the storage chamber from the first inlet, the first outlet is connected to the storage chamber, and a second one-way sealing unit is provided at the first outlet, and the second one-way sealing unit is used to prevent the lubricating medium from entering the cavity from the first outlet; Drive components; When the self-lubricating packing box is in a filling state, the first medium source delivers a second set amount of the first medium into the cavity, the driving component applies a first force to the first medium, the first force causes a third set amount of the first medium to enter the storage chamber, and the first medium applies the first force to the lubricating medium, causing the first set amount of the lubricating medium to enter the polished rod channel; Wherein, the first medium and the lubricating medium are independently arranged.

3. The self-lubricating packing box according to claim 2, characterized in that: The driving assembly comprises a first driving member, the first driving member is transmission-connected with a cam, and the first driving member is used to drive the cam to rotate; A first push plate and a first reset member are provided in the cavity, the first push plate is located on a side of the cam close to the storage chamber, the first push plate and the first shell are slidably matched in a first direction, the first direction is a direction from the cavity toward the storage chamber, the first reset member applies a second force toward the cam to the first push plate, and the second force causes the first push plate to abut against the cam; When the self-lubricating packing box is in the filling state, the first driving member drives the cam to rotate, and the cam applies a third force to the first push plate, and the third force causes the first push plate to move toward and away from the storage chamber. The cam applies the first force to the lubricating medium through the first medium, and causes a first set amount of the lubricating medium to enter the polished rod channel.

4. The self-lubricating packing box according to claim 2, characterized in that: The driving assembly includes a second push plate disposed in the cavity, and a second driving member drivingly connected to the second push plate. When the self-lubricating packing box is in the filling state, the second driving member is used to drive the second push plate to move toward and away from the storage chamber. The second push plate applies the first force to the lubricating medium through the first medium, and allows the first set amount of the lubricating medium to enter the smooth rod channel.

5. The self-lubricating packing box according to claim 2, characterized in that: The first medium source constitutes the driving assembly. When the self-lubricating packing box is in the filling state, the first medium source applies the first force to the lubricating medium and allows a first set amount of the lubricating medium to enter the polished rod channel.

6. The self-lubricating packing box according to any one of claims 2 to 5, characterized in that: The first one-way sealing unit includes a first sealing member disposed at the first inlet, and a second restoring member connected to the first sealing member, the first sealing member is located at a side of the second restoring member close to the first inlet, the second restoring member applies a fourth force to the first sealing member, the fourth force causes the second restoring member to block the first inlet, and the force applied by the first medium source to the first medium is greater than the fourth force; Alternatively, the first one-way sealing unit includes a first valve disposed at the first inlet, and before the second set amount of the first medium is injected into the cavity, the first valve remains open, and after the second set amount of the first medium is injected into the cavity, the controller transmits a second signal to the first valve, and the second signal causes the first valve to close; Alternatively, the first one-way sealing unit includes a first one-way valve disposed at the first inlet, and a communication direction of the first one-way valve is set from a direction away from the cavity toward a direction close to the cavity.

7. The self-lubricating packing box according to any one of claims 2 to 5, characterized in that: The second one-way sealing unit comprises a second sealing member disposed at the first outlet, and a third restoring member connected to the second sealing member, the third restoring member being located at a side of the second sealing member close to the storage chamber, the third restoring member applying a fifth force to the second sealing member, the fifth force causing the second sealing member to block the first outlet, and the first force being greater than the fifth force; Alternatively, the second one-way sealing unit includes a second valve disposed at the first outlet, and before a second set amount of the first medium is injected into the cavity, the second valve remains closed, and after the second set amount of the first medium is injected into the cavity and before a third set amount of the first medium is injected into the storage chamber, the controller transmits a third signal to the second valve, and the third signal causes the second valve to open; Alternatively, the second one-way sealing unit includes a second one-way valve disposed at the first outlet, and a communication direction of the second one-way valve is set from a direction close to the cavity to a direction away from the cavity.

8. The self-lubricating packing box according to claim 1, characterized in that: The storage chamber and the polished rod channel are connected via an input pipeline; Wherein, the lubrication unit comprises a delivery pump arranged on the input pipeline, and a first flow meter arranged on the input pipeline. When the self-lubricating packing box is in a filling state, the filling instruction causes the controller to turn on the delivery pump. After the first flow meter detects that the storage chamber outputs a first set amount of the lubricating medium to the polished rod channel, the first flow meter inputs a fourth signal to the controller, and the fourth signal causes the controller to turn off the delivery pump. Alternatively, the storage chamber is located above the polished rod channel, the lubrication unit includes a third valve provided on the input pipeline, and a second flow meter provided on the input pipeline, when the self-lubricating packing box is in a filling state, the filling instruction causes the controller to open the third valve, after the second flow meter detects that the storage chamber outputs a first set amount of the lubricating medium to the polished rod channel, the second flow meter inputs a fifth signal to the controller, and the fifth signal causes the controller to close the third valve; Alternatively, the lubrication unit includes a fourth valve arranged on the input pipeline, a third flowmeter arranged on the input pipeline, and a third push plate arranged in the storage chamber, the third push plate is transmission-connected to a third drive member, and when the self-lubricating packing box is in a filling state, the first signal causes the controller to open the fourth valve, and causes the third drive member to apply a sixth force to the third push plate, and the sixth force causes the third push plate to be pushed toward the direction close to the light rod channel. After the third flowmeter detects that the storage chamber outputs the first set amount of the lubricating medium to the light rod channel, the third flowmeter inputs a sixth signal to the controller, and the sixth signal causes the controller to close the third drive member and the fourth valve.

9. The self-lubricating packing box according to claim 1, characterized in that: The storage chamber has a first visible window, and the packing box body has a second visible window; the self-lubricating packing box also includes an oil extraction polished rod arranged in the polished rod channel, and a scraper is arranged on the oil extraction polished rod.

10. The self-lubricating packing box according to claim 1, characterized in that: A relief valve is provided at the top of the polished rod channel, and the relief valve is connected to the storage chamber through a loop, and a circulation pump and a filter are provided on the loop; A liquid level meter is provided in the storage chamber, and a flow sensor is provided in the light rod channel. The liquid level meter and the flow sensor are both connected to the controller signal, and the controller signal is connected to an alarm. When the liquid level meter detects that the liquid level of the lubricating medium in the storage chamber is lower than a set value, the liquid level meter sends a seventh signal to the controller, and the seventh signal enables the controller to activate the alarm, and / or when the flow sensor detects that the flow of the lubricating medium in the light rod channel is lower than a set value, the flow sensor sends an eighth signal to the controller, and the eighth signal enables the controller to activate the alarm.

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