Intelligent Compensation Method, System and Storage Medium for Wear of All-Metal Conical Screw Pump

Abstract

An intelligent wear compensation method, system and storage medium for a fully metal conical screw pump are disclosed in an embodiment of the present invention. This method can monitor in real time whether the rotor of the fully metal conical screw pump is worn. Moreover, after detecting that the rotor is worn, there is no need to replace the new pump. Only by the cooperation of the lifting system and the position controller can precise compensation for the rotor wear be achieved. After compensation, the pump efficiency is as good as new, greatly extending the service life of the screw pump, which can at least extend the life by ten times, reducing the oil production cost, and greatly promoting the intelligent development of oil production equipment, and is suitable for popularization and application.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of intelligent oil exploitation, and in particular, to an intelligent wear compensation method, system and storage medium for a full-metal conical screw pump. Background Art

[0002] An oil and gas field refers to the sum of oil reservoirs, gas reservoirs, and oil and gas reservoirs within the same area controlled by a single local tectonic unit. If there is only an oil reservoir within this local tectonic range, it is called an oil field; in order to extract and collect these petroleum resources, oil exploitation equipment is required to drill and extract crude oil during oil exploitation. In the field of oil exploitation, there are generally two types of oil exploitation equipment, one is a pumping unit, and the other is a screw pump. In recent years, the screw pump oil production method has been gradually popularized. However, whether it is a full-metal screw pump or a screw pump with a rubber stator, the disadvantages are becoming increasingly prominent, as follows: First, for the full-metal screw pump: it has low unit energy consumption and high temperature resistance, but due to the design of the double-metal and cylindrical structure, the screw pump is not wear-resistant. After the stator and rotor are worn, the clearance becomes larger, and the pump efficiency decreases. Moreover, except for replacing the new pump, there is no way to solve the problem of the increased clearance, resulting in a short service life and high usage cost of the full-metal screw pump; the double-metal has basically no elasticity and is not resistant to sand jamming during operation. Once jammed, it cannot be released and can only be pulled out of the well for operation, affecting oil production and increasing the oil production cost. Second, for the screw pump with a rubber stator: the rubber has elasticity and is not easily sand-jammed, but it is not resistant to high temperatures and can only withstand a temperature of about 160°C at most. It is easy to age, and the downhole conditions are complex, so the rubber stator ages very quickly, with a short lifespan; it cannot achieve injection-production integration, and each time steam injection is required, the pump needs to be pulled out of the well for operation, increasing the oil production cost; moreover, after the pump efficiency decreases, it cannot be effectively compensated, and only the pump can be pulled out of the well and replaced, with a high usage cost.

[0003] The above problems need to be solved urgently. Summary of the Invention

[0004] To solve the related technical problems, the present invention provides an intelligent wear compensation method, system and storage medium for a full-metal conical screw pump to solve the problems mentioned in the above background art section.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present invention provide an intelligent wear compensation method for a full-metal conical screw pump, including:

[0007] Monitoring whether the full-metal conical screw pump is worn;

[0008] If the monitoring result is yes, determining the wear amount of the rotor of the full-metal conical screw pump;

[0009] Determining the compensation amount required for the rotor of the full-metal conical screw pump according to the wear amount of the rotor of the full-metal conical screw pump;

[0010] Control the height of the full - metal conical screw pump rotor to descend by the compensation amount, compensate for the stator - rotor clearance of the full - metal conical screw pump, and complete the wear compensation of the full - metal conical screw pump.

[0011] As an alternative implementation, monitoring whether the full - metal conical screw pump is worn includes:

[0012] Set the normal mining torque range of the full - metal conical screw pump rotor;

[0013] Judge whether the real - time torque of the full - metal conical screw pump rotor is lower than the lower limit value of the normal mining torque range;

[0014] If the judgment result is yes, judge whether the decline ratio of the liquid output volume reaches the set value under the current oil - water ratio;

[0015] If the judgment result is yes, determine that the full - metal conical screw pump is worn.

[0016] As an alternative implementation, determining the wear amount of the full - metal conical screw pump rotor includes:

[0017] Determine the wear amount of the full - metal conical screw pump rotor according to the decline ratio of the liquid output volume and / or the ratio of the real - time torque lower than the lower limit value of the normal mining torque range.

[0018] As an alternative implementation, controlling the height of the full - metal conical screw pump rotor to descend by the compensation amount includes:

[0019] Control the lifting and lowering movement of the lifting system installed on the wellhead; the position controller installed underground drives the full - metal conical screw pump rotor to descend by the compensation amount under the drive of the lifting and lowering movement of the lifting system.

[0020] As an alternative implementation, controlling the lifting and lowering movement of the lifting system installed on the wellhead; the position controller installed underground drives the full - metal conical screw pump rotor to descend by the compensation amount under the drive of the lifting and lowering movement of the lifting system includes:

[0021] The lifting system is hard - linked to the drive bearing box and the sucker rod; the position controller includes a limiter and a regulator; the limiter is screwed and fixed on the tubing, supporting, positioning the regulator and anchoring the limiter; the upper and lower ends of the regulator are screwed on the sucker rod, supported and limited by the limiter, and connected to the full - metal conical screw pump rotor through the sucker rod, and the lifting system and the regulator are connected into a whole through the sucker rod;

[0022] Control the lifting movement of the lifting system installed on the wellhead. Drive the regulator to impact on the stopper through the sucker rod. The adjusting rod generates a rotational force under the extrusion of the stopper, so as to convert the up-and-down movement into a directional screwing movement through the regulator, and make the adjusting bolt of the adjusting rod screw. The screwing of the adjusting bolt causes the position of the all-metal conical screw pump rotor to drop. Repeat the above process until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount.

[0023] As an alternative implementation, the repeating the above process until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount includes:

[0024] According to the height of each thread pitch of the adjusting bolt of the adjusting rod and the thread pitch that the adjusting bolt can rotate once when the lifting system lifts once, calculate the number of times the lifting system needs to lift for the adjusting bolt of the adjusting rod to screw one circle, and set the adjusting process of the adjusting bolt of the adjusting rod screwing one circle as an adjusting cycle; calculate the number of adjusting cycles required for the position of the all-metal conical screw pump rotor to drop by the compensation amount according to the compensation amount required by the all-metal conical screw pump rotor, and control the lifting system to act according to the calculation result until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount.

[0025] As an alternative implementation, before controlling the lifting movement of the lifting system installed on the wellhead; driving the all-metal conical screw pump rotor to drop by the height of the compensation amount by the position controller installed downhole under the drive of the lifting movement of the lifting system, it further includes:

[0026] Determine the zero position of the elevator in the lifting system, and the lifting of the elevator determines positive and negative values based on this zero position; determine the disengaging point and the contacting point of the stopper in the position controller.

[0027] As an alternative implementation, determine whether the decline ratio of the liquid output volume reaches the set value at the current oil-water ratio; if the judgment result is yes, then determine that the all-metal conical screw pump is worn, specifically including:

[0028] Set the decline ratio of the liquid output volume from small to large as level 1, level 2, and level 3, and determine whether the decline ratio of the liquid output volume reaches level 3 at the current oil-water ratio. If it reaches level 3, then determine that the all-metal conical screw pump is worn.

[0029] In a second aspect, an all-metal conical screw pump wear intelligent compensation system provided by an embodiment of the present invention includes, but is not limited to, a lifting system, a position controller, and a central control system, and uses the all-metal conical screw pump wear intelligent compensation method described in the first aspect above to complete the wear compensation of the all-metal conical screw pump.

[0030] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the intelligent wear compensation method for the all-metal conical screw pump according to any one of the first aspect when executed by a processor.

[0031] Compared with the prior art, the technical solutions of the embodiments of the present invention have the following advantages: First, the all-metal conical screw pump is made of all-metal material, which is heat-resistant and can work normally at 400°C. Therefore, the equipment can realize integrated injection-production operation, reducing the oil production cost; Second, the all-metal conical screw pump changes the cylindrical structure of the traditional screw pump into a conical structure with a larger upper part and a smaller lower part. Whether in a static state or a high-speed operation state, it can cooperate with the lifting system to freely move up and down, achieving a more flexible and effective sand prevention and sticking function than a rubber stator; Third, it can monitor in real time whether the rotor of the all-metal conical screw pump is worn. After detecting the wear of the rotor, there is no need to replace the new pump. Only by the cooperation of the lifting system and the position controller can the precise compensation for the rotor wear be realized. After compensation, the pump efficiency is as good as new, greatly extending the service life of the screw pump, which can at least extend the life by ten times, reducing the oil production cost, and greatly promoting the intelligent development of oil production equipment. Description of the Drawings

[0032] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the background art and the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the content of the embodiments of the present invention and these drawings without creative efforts.

[0033] Figure 1 It is a schematic flow chart of the intelligent wear compensation method for the all-metal conical screw pump provided by the embodiment of the present invention. Detailed Embodiments

[0034] To make the technical problems solved, the technical solutions adopted, and the achieved technical effects of the present invention clearer, the following will further describe the technical solutions of the embodiments of the present invention in detail with reference to the drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Embodiment 1

[0036] As Figure 1 shown, Figure 1Schematic flow diagram of the intelligent wear compensation method for the all-metal conical screw pump provided by the embodiment of the present invention.

[0037] In this embodiment, the intelligent wear compensation method 100 for the all-metal conical screw pump includes:

[0038] S101. Monitor whether the all-metal conical screw pump is worn.

[0039] S102. If the monitoring result in step S101 is yes, determine the wear amount of the rotor of the all-metal conical screw pump.

[0040] S103. Determine the required compensation amount for the rotor of the all-metal conical screw pump according to the wear amount of the rotor of the all-metal conical screw pump.

[0041] S104. Control the rotor of the all-metal conical screw pump to descend by the height of the compensation amount to compensate the stator-rotor clearance of the all-metal conical screw pump, and complete the wear compensation of the all-metal conical screw pump.

[0042] It should be noted that the all-metal conical screw pump is installed underground and includes a stator and a rotor. The stator is provided with an internal thread surface, the rotor is installed inside the stator and is provided with an external thread surface that cooperates with the internal thread surface. Both the internal thread surface and the external thread surface are conical spiral structures and have the same taper.

[0043] The intelligent wear compensation method 100 for the all-metal conical screw pump provided by the embodiment of the present invention can monitor in real time whether the rotor of the all-metal conical screw pump is worn. After detecting that the rotor is worn, it compensates for the wear. After compensation, the pump efficiency is like new, there is no need to replace a new pump, which greatly extends the service life of the screw pump, can at least extend the life by ten times, reduces the oil production cost, and greatly promotes the intelligent development of oil production equipment.

[0044] Embodiment 2

[0045] In this embodiment, the intelligent wear compensation method for the all-metal conical screw pump includes:

[0046] S201. Monitor whether the all-metal conical screw pump is worn.

[0047] S202. If the monitoring result in step S201 is yes, determine the wear amount of the rotor of the all-metal conical screw pump.

[0048] S203. Determine the required compensation amount for the rotor of the all-metal conical screw pump according to the wear amount of the rotor of the all-metal conical screw pump.

[0049] S204. Control the height of the rotor of the all-metal conical screw pump to descend by the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump, and complete the wear compensation of the all-metal conical screw pump.

[0050] It should be noted that the all-metal conical screw pump is installed underground and includes a stator and a rotor. The stator is provided with an internal thread surface, and the rotor is installed inside the stator and is provided with an external thread surface that mates with the internal thread surface. Both the internal thread surface and the external thread surface are conical spiral structures and have the same taper.

[0051] Exemplarily, in this embodiment, monitoring whether the all-metal conical screw pump is worn in step S201 includes:

[0052] S2011. Set the normal mining torque range of the rotor of the all-metal conical screw pump;

[0053] S2012. Determine whether the real-time torque of the rotor of the all-metal conical screw pump is lower than the lower limit value of the normal mining torque range;

[0054] S2013. If the judgment result of step S2012 is yes, then determine whether the decrease ratio of the liquid output volume under the current oil-water ratio reaches the set value;

[0055] S2014. If the judgment result of step S2013 is yes, then determine that the all-metal conical screw pump is worn.

[0056] It should be noted that because the underground conditions are relatively complex and the liquid composition will have a significant impact on the torque, the all-metal conical screw pump divides all oil wells into two categories: heavy oil wells and normal production wells according to the torque limit of the driving motor, and divides the well depth into two categories: within 800 meters and above 800 meters.

[0057] Exemplarily, in this embodiment, for normal production wells within 800 meters, the torque value during normal production is generally set in the range of 80 - 600 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit is set, for example, at 800 N, and an alarm is issued and the torque is forcibly unloaded when the 800 N limit is exceeded.

[0058] Exemplarily, in this embodiment, for normal production wells above 800 meters, the torque value during normal production is generally set in the range of 100 - 800 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; the torque alarm limit is set, for example, at 1000 N, and an alarm is issued and the torque is forcibly unloaded when the 1000 N limit is exceeded.

[0059] For example, in this embodiment, for heavy oil wells within 800 meters, the torque value is generally set at 100-900 Newtons during normal production. If it is lower than the lower limit, an early warning will be issued, and if it is higher than the upper limit, an early warning will also be issued. The torque alarm limit is set to, for example, 1000 Newtons. When the limit exceeds 1000 Newtons, the system will alarm and force unloading of the torque.

[0060] For example, in this embodiment, for heavy oil wells above 800 meters, the torque value is generally set at 120-900 Newtons during normal production. If it is lower than the lower limit, a warning will be issued, and if it is higher than the upper limit, a warning will also be issued. The torque alarm limit is set to 99% of the limit (the torque limit of the motor is generally between 1050-1500 Newtons), and an alarm will be issued and the torque will be forced to unload before it reaches 99%.

[0061] Exemplarily, in this embodiment, step S2013 specifically includes:

[0062] If the real-time torque of the all-metal conical screw pump rotor is lower than the lower limit of the normal mining torque range, the drive motor will promptly feedback to the central control cabinet, provide an early warning, and perform the following operations:

[0063] First, according to the liquid output and oil-water ratio data regularly transmitted back by the liquid volume ratio sensor installed at the wellhead or the real-time oil production data fed back manually, it is judged whether the liquid output is normal. If the liquid output is normal, the warning is lifted.

[0064] Secondly, if the liquid output is lower than the normal value, the decrease ratio of the liquid output is determined; illustratively, in this embodiment, the decrease ratio of the liquid output is set from small to large as level 1, level 2, and level 3, and it is determined whether the decrease ratio of the liquid output under the current oil-water ratio reaches level 3. If it does not reach level 3, the driving motor is controlled to increase the speed until the set liquid output range is reached. Among them, in this embodiment, level 1 and level 2 are generally set to within 1 / 3 of the normal value of the overall liquid output.

[0065] Third, if the decrease ratio of the liquid output under the current oil-water ratio reaches level 3, and the increased speed of the driving motor is not proportional to the liquid output of the pump caliber, the automatic pressure-closing valve installed at the wellhead is controlled to perform an automatic pressure-closing test on the pump efficiency. If the pressure display cannot reach the set value within the specified time (for example, the wellhead closing pressure is generally set to 5 MPa within 5 minutes), it proves that the all-metal conical screw pump is worn, the clearance between the stator and rotor of the all-metal conical screw pump becomes larger, and the pump efficiency decreases. In this case, it is necessary to control the lifting system to lower the limiter of the position controller, lower the rotor, restore the clearance fit between the stator and rotor, and restore the optimal pump efficiency.

[0066] It should be noted that when the position is adjusted, the closing pressure valve will be closed first, and then the speed will be adjusted to restore the speed to the initial normal mining speed, so that the initial pump efficiency can be accurately debugged in the next step. According to the working principle of the lifting system and the position controller, for example, the central control system instructs the lifting system to lift 7 times as an adjustment cycle, and the screw thread of the regulator will be rotated down one circle, and the rotor will drop 2mm. After each adjustment cycle of the lifting system, the set time, such as 5 minutes, will be stopped to allow the sensor of the closing pressure valve to transmit stable timing data. This will be repeated until the closing pressure pump efficiency reaches the initial set normal value, and the lifting system will stop working. Because the torque during closing pressure is bound to be higher than that during normal production, the torque during closing pressure will automatically be limited to the limit value of the drive motor. After the closing pressure test meets the standard, the closing pressure valve will automatically open, and the all-metal conical screw pump will resume mining. The central control system will re-determine the liquid output and torque according to the height of the real-time dynamic liquid level, so that the adjusted pump can achieve the effect of a new pump. If necessary, it is necessary to conduct a review and debugging. For example, in this embodiment, the central control system redetermines the liquid output and torque based on the real-time dynamic liquid level height because for every 100-meter drop in the dynamic liquid level, the thrust needs to be increased by 1 MPa, and the torque needs to be increased by 20-30 Newtons. For every 10% increase in the oil content in the oil-water ratio, the liquid output needs to be reduced by 10-20%, and the torque needs to be increased by 20-50 Newtons.

[0067] Exemplarily, in the steps S202-S203 in the present embodiment, if the monitoring result of step S201 is yes, then the wear amount of the all-metal conical screw pump rotor is determined; according to the wear amount of the all-metal conical screw pump rotor, the compensation amount required for the all-metal conical screw pump rotor is determined, specifically including:

[0068] In this embodiment, if step S201 determines that the all-metal conical screw pump rotor is worn, the lifting system controls the rotor position to drop by 2 mm for every 10% drop in the liquid output below the set normal value.

[0069] In this embodiment, if step S201 determines that the all-metal conical screw pump rotor is worn, the lifting system controls the rotor position to drop by 2 mm for every 10% the torque is lower than the lower limit of the normal mining torque range.

[0070] If there is an error of 10% after the initial adjustment, the central control system will automatically retest according to the result. If the pump efficiency does not reach the set normal value after compensation, the central control system will make a second adjustment and compensation after automatic detection until it reaches the standard.

[0071] Exemplarily, in this embodiment, controlling the rotor of the all-metal conical screw pump to drop by the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump and complete the wear compensation of the all-metal conical screw pump includes:

[0072] Control the lifting motion of the lifting system installed above the wellhead; the position controller installed downhole drives the rotor of the all-metal conical screw pump to descend by the height of the compensation amount under the drive of the lifting motion of the lifting system.

[0073] Specifically, in this embodiment, the lifting system rigidly links the drive bearing box and the sucker rod. In this embodiment, the lifting system belongs to a surface device, which can accurately control the overall lifting of the entire sucker rod and its connectors and attachments, and can achieve an effective lifting stroke of more than 0 - 2000 mm. This lifting stroke actually refers to the lead screw stroke. In theory, the longer the lead screw is made, the longer the stroke can be, as long as the operation safety can be controlled. The position controller is a downhole device, and its normal installation position is 4 - 10 meters above the upper port of the pump, but it is not limited to this and can be adjusted according to the actual application scenario. The position controller includes a limiter and a regulator; the limiter is the hollow outer cylinder device of the position controller, and the limiter is screwed and fixed on the tubing, supporting and positioning the regulator and anchoring the limiter; the regulator is the core device of the position controller, and its upper and lower ends are screwed on the sucker rod, supported and positioned by the limiter, and connected to the rotor of the all-metal conical screw pump through the sucker rod. The lifting system and the regulator are connected into a whole through the sucker rod and lift in unison.

[0074] Specifically, in this embodiment, to control the lifting motion of the lifting system installed above the wellhead, the regulator is driven by the sucker rod to press against the limiter, and the adjusting rod generates a rotational force under the extrusion of the limiter, thereby converting the up and down motion into a directional screwing motion through the regulator, causing the adjusting bolt of the adjusting rod to be screwed. The screwing of the adjusting bolt causes the position of the rotor of the all-metal conical screw pump to descend. Repeat the above process until the position of the rotor of the all-metal conical screw pump descends by the height of the compensation amount.

[0075] Specifically, in this embodiment, the process of repeating the above process until the position of the rotor of the all-metal conical screw pump descends by the height of the compensation amount includes:

[0076] According to the pitch height of each thread stroke of the adjusting bolt of the adjusting rod and the thread stroke that the adjusting bolt of the adjusting rod can rotate when the lifting system makes one lift, calculate the number of lifts of the lifting system required for the adjusting bolt of the adjusting rod to be screwed one turn, and set the adjusting process of the adjusting bolt of the adjusting rod being screwed one turn as an adjustment cycle; calculate the number of adjustment cycles required for the position of the rotor of the all-metal conical screw pump to descend by the compensation amount according to the compensation amount required by the rotor of the all-metal conical screw pump, and control the action of the lifting system according to the calculation result until the position of the rotor of the all-metal conical screw pump descends by the height of the compensation amount.

[0077] Exemplarily, in this embodiment, it is illustrated as follows. There are 7 pairs of upper and lower mating teeth in one turn of the adjusting screw of the regulator. Each time the elevator descends, the mating teeth move forward one tooth along the inclined plane. When ascending, the spring will separate the mating teeth. Repeating this way, when the elevator ascends and descends 7 times, the regulator screw turns exactly one circle. And the pitch of each turn of the thread of the regulator is about 2 mm. Therefore, each time the elevator ascends and descends 7 times, the rotor descends and compensates by 2 mm. For example, when the central control system detects that the liquid output has decreased by more than 1 / 3, according to the above-set rules, at this time the rotor has to descend at least 6 mm. Then, according to the known conditions, the central control system will instruct the elevator to first perform 3 adjustment cycles, a total of 21 ascents and descents. Thus, according to the known data, set programs, mechanical conditions, etc., the solution of the embodiment of the present invention can accurately determine the compensation height to: each ascent and descent of the lifting system can make the rotor descend and compensate by about 0.3 mm, and each adjustment cycle has 7 times (not limited to this), which can compensate by 2 mm, achieving accurate compensation for the worn rotor.

[0078] Exemplarily, before controlling the lifting motion of the lifting system arranged on the wellhead in this embodiment; and driving the rotor of the all-metal conical screw pump to descend by the height of the compensation amount under the drive of the position controller arranged underground during the lifting motion of the lifting system, it further includes:

[0079] 1. Determine the zero position of the elevator in the lifting system. The ascent and descent of the elevator are determined with positive and negative values based on this zero position: Exemplarily, during the commissioning before starting a newly installed pump, first manually input a position number on the screen of the central control system, then click on position confirmation. After the elevator runs to the in-place position, click to set the zero position with this position. After that, the ascent and descent of the elevator are determined with positive and negative values based on the zero position. It should be noted that generally, the given position is generally based on the heaviest position displayed by the weighing system minus 200 - 500 kg, but it is necessary to ensure a clearance margin of 10 - 20 mm at the lower opening of the bearing box to prevent the bearing box from hitting when the elevator descends to the zero position. In this embodiment, the position controller also adjusts back and forth upward with this zero position as the lower fixed point.

[0080] II. Determine the disengagement point and contact point of the position controller: When commissioning the equipment after installation in the well and before production, it is first necessary to determine the disengagement point and contact point of the position controller based on the weighing data of the weighing system, and use this as a reference to provide data support and mechanical travel margin for the precise adjustment of the position controller: 1. When the elevator is statically commissioned, if the downhole position controller disengages during lifting, then at this time the elevator will support the static weights of the entire drive bearing box, sucker rod, rotor and other production systems. At the same time, this weight will naturally press on the weighing system, and the data will be synchronously displayed on the central screen in real time. 2. If the elevator continues to rise at this time but the weighing display does not change or fluctuate, it can be confirmed that the position controller has disengaged, and the weight at this time is also the heaviest in the static state. 3. When it is confirmed that the position controller has disengaged, slowly lower the elevator and determine the approximate positions of the elevator when the weighing display is the heaviest and when it becomes lighter. If the position of the elevator does not change after repeating the weight change three times, then the basic positions of the limiter disengaging and contacting can be confirmed. At this time, lower the elevator to a position about 200 - 500 kg lower to compact the spring virtual position of the limiter to reach the formal production position. It should be noted that this is related to the high-speed steel of the contact part during limiting. If the spring is not compacted, the contact part will have virtual contact wear. If it is compacted, the load-bearing bearing of the limiter itself will rotate, and the contact part will have less wear, increasing the service life of the position controller. 4. The weight display of the weighing system is opposite to the load-bearing of the limiter. Whenever the weighing value increases, the load-bearing of the downhole limiter will necessarily decrease. If the weighing value decreases, the limiter is just the opposite, and whether it is static or dynamic, the theoretical values should be consistent.

[0081] The advantages of the intelligent wear compensation method for the all-metal conical screw pump provided by the embodiment of the present invention are as follows: I. The all-metal conical screw pump adopts all-metal materials, is heat-resistant, and can work normally at 400 °C. Therefore, the equipment can realize integrated injection-production operation, reducing the oil production cost; II. The all-metal conical screw pump changes the cylindrical structure of the traditional screw pump into a conical structure with a larger upper part and a smaller lower part. Whether in a static state or a high-speed operation state, it can freely move up and down by cooperating with the lifting system, realizing a more flexible and effective sand prevention and sticking function than the rubber stator; III. It can monitor in real time whether the rotor of the all-metal conical screw pump is worn. After detecting that the rotor is worn, there is no need to replace the new pump. Only by cooperating the lifting system with the position controller can the precise compensation for the rotor wear be realized. After compensation, the pump efficiency is like new, greatly extending the service life of the screw pump, which can at least extend the life by ten times, reducing the oil production cost, and greatly promoting the intelligent development of oil production equipment.

[0082] Embodiment III

[0083] In this embodiment, the intelligent wear compensation method for the all-metal conical screw pump includes:

[0084] S301. Monitor whether the all-metal conical screw pump is worn;

[0085] S302. If the monitoring result in step S301 is yes, determine the wear amount of the rotor of the all-metal conical screw pump;

[0086] S303. Determine the required compensation amount for the rotor of the all-metal conical screw pump according to the wear amount of the rotor of the all-metal conical screw pump;

[0087] S304. Control the rotor of the all-metal conical screw pump to descend by the height of the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump, and complete the wear compensation of the all-metal conical screw pump.

[0088] It should be noted that the all-metal conical screw pump is installed underground and includes a stator and a rotor. The stator is provided with an internal thread surface, the rotor is installed inside the stator and is provided with an external thread surface that cooperates with the internal thread surface. Both the internal thread surface and the external thread surface are conical spiral structures and have the same taper.

[0089] Exemplarily, in this embodiment, monitoring whether the all-metal conical screw pump is worn in step S301 includes:

[0090] S3011. Set the normal mining torque range of the rotor of the all-metal conical screw pump;

[0091] S3012. Judge whether the real-time torque of the rotor of the all-metal conical screw pump is lower than the lower limit value of the normal mining torque range;

[0092] S3013. If the judgment result in step S3012 is yes, judge whether the decrease ratio of the liquid output volume reaches the set value under the current oil-water ratio;

[0093] S3014. If the judgment result in step S3013 is yes, determine that the all-metal conical screw pump is worn.

[0094] It should be noted that because the underground conditions are relatively complex and the liquid composition will have a significant impact on the torque, the all-metal conical screw pump divides all oil wells into two categories: heavy oil wells and normal production wells according to the torque limit value of the driving motor, and divides the well depth into two categories: within 800 meters and above 800 meters.

[0095] Exemplarily, in this embodiment, for normal production wells within 800 meters, the torque value during normal production is generally set in the range of 80 - 600 N. An alarm is issued when it is lower than the lower limit value, and an alarm is also issued when it is higher than the upper limit value; set the torque alarm limit value to 800 N for example, and an alarm is issued and the torque is forcibly unloaded when it exceeds the 800 N limit.

[0096] For example, in this embodiment, for wells above 800 meters, the torque value is generally set at 100-800 Newtons during normal mining. If it is below the lower limit, an early warning will be issued, and if it is above the upper limit, an early warning will also be issued. The torque alarm limit is set, for example, 1000 Newtons. When the limit exceeds 1000 Newtons, an alarm will be issued and the torque will be forced to unload.

[0097] For example, in this embodiment, for heavy oil wells within 800 meters, the torque value is generally set at 100-900 Newtons during normal production. If it is lower than the lower limit, an early warning will be issued, and if it is higher than the upper limit, an early warning will also be issued. The torque alarm limit is set to, for example, 1000 Newtons. When the limit exceeds 1000 Newtons, the system will alarm and force unloading of the torque.

[0098] For example, in this embodiment, for heavy oil wells above 800 meters, the torque value is generally set at 120-900 Newtons during normal production. If it is lower than the lower limit, a warning will be issued, and if it is higher than the upper limit, a warning will also be issued. The torque alarm limit is set to 99% of the limit (the torque limit of the motor is generally between 1050-1500 Newtons), and an alarm will be issued and the torque will be forced to unload before it reaches 99%.

[0099] Exemplarily, in this embodiment, step S3013 specifically includes:

[0100] If the real-time torque of the all-metal conical screw pump rotor is lower than the lower limit of the normal mining torque range, the drive motor will promptly feedback to the central control cabinet, provide an early warning, and perform the following operations:

[0101] First, according to the liquid output and oil-water ratio data regularly transmitted back by the liquid volume ratio sensor installed at the wellhead or the real-time oil production data fed back manually, it is judged whether the liquid output is normal. If the liquid output is normal, the warning is lifted.

[0102] Secondly, if the liquid output is lower than the normal value, the decrease ratio of the liquid output is determined; illustratively, in this embodiment, the decrease ratio of the liquid output is set from small to large as level 1, level 2, and level 3, and it is determined whether the decrease ratio of the liquid output under the current oil-water ratio reaches level 3. If it does not reach level 3, the driving motor is controlled to increase the speed until the set liquid output range is reached. Among them, in this embodiment, level 1 and level 2 are generally set to within 1 / 3 of the normal value of the overall liquid output.

[0103] Thirdly, if the decline ratio of the liquid output at the current oil-water ratio reaches level 3 and the increased speed of the driving motor is not proportional to the liquid output of the pump diameter, then control the automatic pressure closing valve installed at the wellhead to conduct an automatic pressure closing test on the pump efficiency. If the pressure display cannot reach the set value within the specified time (for example, generally set that the wellhead pressure closing reaches 5 mpa within 5 minutes), it proves that the all-metal conical screw pump is worn, the clearance between the stator and rotor of the all-metal conical screw pump becomes larger, and the pump efficiency decreases. Then, it is necessary to control the lifting system to lower the position of the limiter of the position controller, lower the position of the rotor, and the stator and rotor resume the clearance fit to restore the best pump efficiency.

[0104] It should be noted that when starting to adjust the position, the pressure closing valve will be closed first, and then the speed will be adjusted to restore the speed to the initial normal production speed for the next precise adjustment to the initial pump efficiency. According to the following text, the working principle of the cooperation between the lifting system and the position controller is as follows. For example, the central control system commands the lifting system to perform 7 lifts and descents as one adjustment cycle, and the thread of the regulator will rotate down one turn, allowing the rotor to descend 2 mm. After each adjustment cycle of the lifting system, it will stop for a set time, such as 5 minutes, to allow the sensor of the pressure closing valve to transmit stable timing data. This process is repeated until the pump efficiency of the pressure closing reaches the initial set normal value, and then the lifting system stops working. Since the torque during pressure closing will necessarily be higher than that during normal production, the torque during pressure closing will automatically be limited by the limit value of the driving motor. After the pressure closing test is qualified, the pressure closing valve automatically opens, and the all-metal conical screw pump restarts production. The central control system re-determines the liquid output and torque according to the real-time height of the liquid level, in order to make the adjusted pump achieve the effect of a new pump. If necessary, a recheck and adjustment are also required. Exemplarily, in this embodiment, the reason why the central control system re-determines the liquid output and torque according to the real-time height of the liquid level is that for every 100-meter drop in the liquid level, 1 mpa of thrust needs to be increased, the torque needs to be increased by 20 - 30 N, and for every 10% increase in the oil content in the oil-water ratio, the liquid output needs to be reduced by 10 - 20% accordingly, and the torque also needs to be increased by 20 - 50 N.

[0105] Exemplarily, in step S302 - S303 of this embodiment, if the monitoring result of step S301 is yes, then determine the wear amount of the rotor of the all-metal conical screw pump; according to the wear amount of the rotor of the all-metal conical screw pump, determine the compensation amount required for the rotor of the all-metal conical screw pump, specifically including:

[0106] In this embodiment, if step S301 determines that the rotor of the all-metal conical screw pump is worn, then for every 10% that the liquid output is lower than the set normal value, the lifting system controls the position of the rotor to descend and compensate by 2 mm.

[0107] In this embodiment, if step S301 determines that the all-metal conical screw pump rotor is worn, the lifting system controls the rotor position to drop by 2 mm for every 10% the torque is lower than the lower limit of the normal mining torque range.

[0108] If there is an error of 10% after the initial adjustment, the central control system will automatically retest according to the result. If the pump efficiency does not reach the set normal value after compensation, the central control system will make a second adjustment and compensation after automatic detection until it reaches the standard.

[0109] Exemplarily, in this embodiment, controlling the rotor of the all-metal conical screw pump to drop by the compensation amount to compensate for the stator-rotor clearance of the all-metal conical screw pump and complete the wear compensation of the all-metal conical screw pump includes:

[0110] The lifting and lowering movement of the lifting system arranged above the well is controlled; the position controller arranged below the well drives the rotor of the all-metal conical screw pump to descend to the height of the compensation amount under the influence of the lifting and lowering movement of the lifting and lowering system.

[0111] Specifically, in this embodiment, the lifting system is hard-linked to the transmission bearing box and the sucker rod. In this embodiment, the lifting system belongs to a ground device, which can accurately control the overall lifting of the entire sucker rod and its connecting parts and attachments, and can achieve an effective lifting stroke of more than 0-2000mm. The lifting stroke actually refers to the screw stroke. In theory, the length of the screw can be as long as the stroke can be controlled safely. The position controller is a downhole device, and the normal installation position is 4-10 meters above the upper mouth of the pump, but it is not limited to this and can be adjusted according to the actual application scenario. The position controller includes a limiter and an adjuster; the limiter is a hollow outer cylinder device of the position controller, and the limiter is screwed and fixed on the oil pipe to support, control the position of the adjuster and anchor the limiter; the adjuster is the core device of the position controller, and the upper and lower ends are screwed on the sucker rod, supported and limited by the limiter, and connected to the rotor of the all-metal conical screw pump through the sucker rod. The lifting system and the adjuster are connected as a whole through the sucker rod, and the lifting is consistent.

[0112] Specifically, in this embodiment, the lifting and lowering movement of the lifting system arranged on the well is controlled, and the regulator is driven by the sucker rod to hit the limiter. The adjusting rod is squeezed by the limiter to generate a rotational force, thereby converting the up and down movement into a directional screwing movement through the regulator, so that the adjusting bolt of the adjusting rod is screwed. The screwing of the adjusting bolt causes the position of the all-metal conical screw pump rotor to drop, and the above process is repeated until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount.

[0113] Specifically, in this embodiment, repeating the above process until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount includes:

[0114] Based on the height of each thread pitch of the adjusting bolt of the adjusting rod and the thread pitch that the adjusting bolt of the adjusting rod can rotate for each lift of the lifting system, calculate the number of lifts of the lifting system required for the adjusting bolt of the adjusting rod to be screwed one full turn, and set the adjustment process for each full turn of the adjusting bolt of the adjusting rod as one adjustment cycle; calculate the number of adjustment cycles required for the position of the all-metal conical screw pump rotor to drop by the compensation amount according to the compensation amount required by the all-metal conical screw pump rotor, and control the lifting system to act according to the calculation result until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount.

[0115] Exemplarily, in this embodiment, for example, there are 7 pairs of upper and lower mating teeth for one full turn of the screwing bolt of the regulator. Each time the elevator presses down, the mating teeth move forward one tooth along the inclined plane. When rising, the spring will separate the mating teeth. Repeating like this, the elevator needs to lift 7 times for the regulator to be screwed one full turn. And the pitch of each turn of the thread of the regulator is about 2 mm. Therefore, each time the elevator lifts 7 times, the rotor drops by 2 mm for compensation. For example, when the central control system detects that the liquid output has decreased by more than 1 / 3, according to the above-set rules, at this time the rotor needs to drop at least 6 mm. Then, according to the known conditions, the central control system will instruct the elevator to first perform 3 adjustment cycles, a total of 21 lifts. Thus, it can be seen that according to the known data, set programs, mechanical conditions, etc., the solution of the embodiment of the present invention can accurately control the compensation height to: each lift of the lifting system can make the rotor compensate downward by about 0.3 mm, and each adjustment cycle has 7 times (not limited to this), which can compensate 2 mm, realizing accurate compensation for the wear of the rotor.

[0116] Exemplarily, in this embodiment, before controlling the lifting system arranged on the wellhead to perform lifting motion; and the position controller arranged underground drives the all-metal conical screw pump rotor to drop by the height of the compensation amount driven by the lifting motion of the lifting system, further includes:

[0117] 1. Determine the zero position of the elevator in the lifting system. The positive and negative values of the elevator's lifting are determined based on this zero position. Exemplarily, during the commissioning before starting a newly installed pump, first manually enter a position number on the screen of the central control system, then click the position confirmation. After the elevator runs to the designated position, click to set the zero position with this position. All subsequent elevator liftings use the zero position to determine the positive and negative values. It should be noted that generally, the given position is generally based on the heaviest position displayed by the weighing system minus 200 - 500 kg, but it is necessary to ensure a clearance margin of 10 - 20 mm at the lower opening of the bearing box to prevent the bearing box from hitting when the elevator descends to the zero position. In this embodiment, the position controller also adjusts up and down with this zero position as the lower fixed point.

[0118] 2. Determine the disengagement point and contact point of the position controller: During the commissioning before production after the equipment is installed in the well, first, it is necessary to determine the disengagement point and contact point of the position controller based on the weighing data of the weighing system, and use this as a reference to provide data support and mechanical stroke margin for the precise adjustment of the position controller: 1. When the elevator is statically debugged, if the downhole position controller disengages during lifting, then at this time, the elevator will support the static weights of the entire transmission bearing box, sucker rod, rotor, and other production systems. At the same time, this weight will naturally press on the weighing system and synchronously display the data on the central screen in real-time. 2. If the elevator continues to rise at this time but the weighing display does not change or fluctuate, it can be confirmed that the position controller has disengaged, and the weight at this time is also the heaviest in the static state. 3. When it is confirmed that the position controller has disengaged, slowly lower the elevator and determine the approximate positions of the elevator when the weighing display is the heaviest and when it becomes lighter. If the positions of the elevator do not change after repeating the weight change three times, then the basic positions of the limiter's disengagement and contact can be confirmed. At this time, lower the elevator to a position about 200 - 500 kg lower to compact the spring virtual position of the limiter and reach the formal production position. It should be noted that it is related to the high-speed steel of the contact part during limiting. If the spring is not compacted, the contact part will have virtual contact wear. If it is compacted, the load-bearing bearing of the limiter itself will rotate, and the contact part will have less wear, increasing the service life of the position controller. 4. The weight display of the weighing system and the load-bearing of the limiter are opposite. Whenever the weighing value increases, the load-bearing of the downhole limiter will necessarily decrease. If the weighing value decreases, the limiter is just the opposite, and its theoretical value should remain the same whether it is static or dynamic.

[0119] Exemplarily, in this embodiment, the intelligent wear compensation method for the all-metal conical screw pump further includes: according to the normal production torque range and torque alarm limit values set for heavy oil wells and normal production wells as described above, when the torque is higher than the upper limit value of the normal production torque range, give an early warning and determine whether to execute the torque overload procedure; when the torque reaches the torque alarm limit value, give an alarm and execute the forced torque unloading procedure; in extreme weather, when the torque instantaneously overloads, start the shutdown procedure and the ultimate safety procedure; specifically as follows:

[0120] 1. When the torque is higher than the upper limit value of the normal production torque range, give an early warning and determine whether to execute the torque overload procedure

[0121] In this embodiment, the high-torque early warning is for the motor to provide an early warning to the central control system in a timely manner when the peak torque is too high. Because as the liquid level drops, the lifting requirement for the pump is higher, resulting in a higher torque output of the pump. Therefore, when the torque is higher than the upper limit value of the normal production torque range, first, the weighing system calculates the height of the downhole dynamic liquid level based on the weight of the entire pipe of oil, and determines whether the liquid supply is insufficient. If so, it automatically calculates the optimal constant-speed production volume at the current liquid level to appropriately reduce the liquid output to prevent dry production after the liquid level reaches zero; if the liquid supply is sufficient, it is determined that the increase in torque is caused by an overload of the liquid sand content. The central control system performs automatic sand removal according to the data detected at the wellhead and the preset torque overload procedure until the torque returns to normal. Among them, the weighing system calculates the height of the downhole dynamic liquid level (the height from the ground to the liquid level) based on the weight of the entire pipe of oil, including: according to the heaviest display (static) of the weighing system during the commissioning of the oil production equipment, confirm the net weight of all equipment (transmission gearbox, elevator, sucker rod, rotor) borne by the weighing system (the weight includes the buoyancy of the liquid at the submersion depth); according to the heaviest display (dynamic, including full pipe of liquid) of the weighing system during the production of the oil production equipment, confirm the dynamic net weight during equipment production (including the buoyancy of the liquid at the submersion depth of the equipment); dynamic net weight - static net weight = net weight of liquid lift (the buoyancy at the submersion depth of dynamic and static is offset), net weight of liquid lift ÷ net weight of liquid per meter = height of dynamic liquid level.

[0122] 2. When the torque reaches the torque alarm limit value, give an alarm and execute the forced torque unloading procedure

[0123] In this embodiment, when the torque alarm limit value is reached, an instruction is issued to force the lifting system to rise. When the weighing system shows that it reaches the highest value of the full pipe of oil and the weight suddenly starts to drop, the stator and rotor of the all-metal conical screw pump are disengaged until the torque is unloaded; it should be noted that after the stator and rotor of the all-metal conical screw pump are disengaged, the downward discharge channel around the rotor will open, and the full pipe of oil will discharge downward, and then the weight becomes lighter.

[0124] After the torque unloading is confirmed to be safe, the lifting system is commanded to resume the position of the previous normal production (before the torque is unloaded) for trial production until it is confirmed that all data, such as normal torque and non-reverse rotation of the bearing box, reach the set indicators before formal production. If the torque continues to be overloaded after restarting production, the lifting system will repeatedly rise multiple times according to the preset program, and the position of each repeated rise is higher than the previous rise by a set value until the torque returns to normal. It should be noted that the set value here is generally set to the height value adjusted in one adjustment cycle, which is convenient for calculating the adjustment times of the limiter.

[0125] III. In extreme weather, when the torque instantaneously overloads, start the shutdown program and the ultimate safety program

[0126] In this embodiment, if an extreme situation is encountered and the torque instantaneously overloads, since it takes time for the torque to be transmitted up and down, the central control system may not process it in time, which may cause the motor to instantaneously rotate at high speed in the reverse direction, resulting in the rod of the sucker rod being disengaged or even the bearing box being thrown off (i.e., the "flywheel phenomenon"). At this time, the central control system automatically starts the shutdown program, the elevator rises to the highest value, and at the same time starts the ultimate safety program to slowly release the torque until the torque returns to zero. Among them, the ultimate safety program includes: setting up a torque safety system; the torque safety system is installed on the reverse side of the control cabinet and consists of n resistors; after the ultimate safety program is started, the resistors use their resistance ability to prevent the motor from rotating at high speed in the reverse direction and can control the reverse rotation within a safe speed, such as 60 revolutions per minute, so that it can not only slowly unload the torque, but also form a reaction force with the high torque transmitted from the well, making the sucker rod only get tighter and not get disengaged or cause the flywheel phenomenon until the torque returns to zero.

[0127] The advantages of the intelligent wear compensation method for the all-metal conical screw pump provided by the embodiment of the present invention are as follows: First, the all-metal conical screw pump is made of all-metal materials, has high temperature resistance, and can work normally at 400 °C. Therefore, the equipment can realize integrated injection-production operation, reducing the oil production cost; Second, the all-metal conical screw pump changes the cylindrical structure of the traditional screw pump into a conical structure with a larger upper part and a smaller lower part. Whether in the static state or the high-speed operation state, it can, in cooperation with the lifting system, freely realize the up-and-down movement, achieving a more flexible and effective sand prevention and card prevention function than the rubber stator; Third, it can monitor in real time whether the rotor of the all-metal conical screw pump is worn. After the rotor is monitored to be worn, there is no need to replace a new pump. Only by the cooperation of the lifting system and the position controller can the accurate compensation for the rotor wear be realized. After compensation, the pump efficiency is like new, greatly extending the service life of the screw pump, which can at least extend the life by ten times, reducing the oil production cost, and greatly promoting the intelligent development of oil production equipment. Fourth, it can monitor and handle the torque warning, torque overload alarm, and torque instantaneous overload problems in real time to ensure the safe and stable operation of the oil production equipment.

[0128] Embodiment 4

[0129] This embodiment provides an intelligent wear compensation system for a fully metal conical screw pump. The system includes, but is not limited to, a lifting system, a position controller, and a central control system. The intelligent wear compensation method for the fully metal conical screw pump described in any one of the above Embodiment 1, Embodiment 2, or Embodiment 3 is used to complete the wear compensation for the fully metal conical screw pump.

[0130] In the intelligent wear compensation system for the fully metal conical screw pump provided by the embodiment of the present invention, the fully metal conical screw pump is made of fully metal material, which is heat-resistant and can work normally at 400 °C. Therefore, the equipment can realize the integrated injection-production operation and reduce the oil production cost; the fully metal conical screw pump changes the cylindrical structure of the traditional screw pump into a conical structure with a larger upper part and a smaller lower part. Whether in a static state or a high-speed operation state, it can freely move up and down with the cooperation of the lifting system, and realize a more flexible and effective sand prevention and sticking function than the rubber stator; it can monitor in real time whether the rotor of the fully metal conical screw pump is worn. Moreover, after the rotor is worn, there is no need to replace the new pump. Only through the cooperation of the lifting system and the position controller can the precise compensation for the rotor wear be realized. After the compensation, the pump efficiency is as good as new, which greatly extends the service life of the screw pump and can at least extend the life by ten times, reducing the oil production cost.

[0131] Embodiment 5

[0132] The embodiment of the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the intelligent wear compensation method for the fully metal conical screw pump described in the above Embodiment 1 or Embodiment 2.

[0133] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An intelligent compensation method for wear of a fully metal conical screw pump, characterized in that, Including: Monitoring whether the all-metal conical screw pump is worn; If the monitoring result is yes, determining the wear amount of the rotor of the all-metal conical screw pump; Determining the compensation amount required for the rotor of the all-metal conical screw pump according to the wear amount of the rotor of the all-metal conical screw pump; Controlling the rotor of the all-metal conical screw pump to descend by the height of the compensation amount, compensating the stator-rotor clearance of the all-metal conical screw pump, and completing the wear compensation of the all-metal conical screw pump; The controlling the rotor of the all-metal conical screw pump to descend by the height of the compensation amount includes: Controlling the lifting system arranged on the wellhead to perform lifting motion; the position controller arranged downhole drives the rotor of the all-metal conical screw pump to descend by the height of the compensation amount under the drive of the lifting motion of the lifting system; The controlling the lifting system arranged on the wellhead to perform lifting motion; the position controller arranged downhole drives the rotor of the all-metal conical screw pump to descend by the height of the compensation amount under the drive of the lifting motion of the lifting system includes: The lifting system hard-links the transmission bearing box and the sucker rod; the position controller includes a stopper and a regulator; the stopper is screwed and fixed on the tubing, supporting, positioning the regulator and anchoring the stopper; the upper and lower ends of the regulator are screwed on the sucker rod, supported and positioned by the stopper, and connected to the rotor of the all-metal conical screw pump through the sucker rod, and the lifting system and the regulator are connected into a whole through the sucker rod; Controlling the lifting system arranged on the wellhead to perform lifting motion, driving the regulator to press against the stopper through the sucker rod, the adjusting rod generates a rotational force under the extrusion of the stopper, thereby converting the up-and-down motion into a directional screwing motion through the regulator, causing the adjusting bolt of the adjusting rod to be screwed, and the screwing of the adjusting bolt causes the position of the rotor of the all-metal conical screw pump to descend. Repeat the above process until the position of the rotor of the all-metal conical screw pump descends by the height of the compensation amount.

2. The intelligent wear compensation method for the all-metal conical screw pump according to claim 1, characterized in that, The monitoring whether the all-metal conical screw pump is worn includes: Setting the normal production torque range of the rotor of the all-metal conical screw pump; Judging whether the real-time torque of the rotor of the all-metal conical screw pump is lower than the lower limit value of the normal production torque range; If the judgment result is yes, judging whether the decrease ratio of the liquid output volume reaches the set value under the current oil-water ratio; If the judgment result is yes, determining that the all-metal conical screw pump is worn.

3. The intelligent wear compensation method for the all-metal conical screw pump according to claim 2, characterized in that, The determining the wear amount of the rotor of the all-metal conical screw pump includes: determining the wear amount of the rotor of the all-metal conical screw pump according to the decrease ratio of the liquid output volume and / or the ratio of the real-time torque lower than the lower limit value of the normal production torque range.

4. The intelligent wear compensation method for the all-metal conical screw pump according to claim 1, wherein The repeating the above process until the position of the rotor of the all-metal conical screw pump descends by the height of the compensation amount includes: Calculate the number of times the lifting system needs to lift and lower for the adjusting bolt of the adjusting rod to rotate one full thread pitch based on the pitch height of each full thread pitch of the adjusting bolt of the adjusting rod and the number of thread pitches that the adjusting bolt can rotate when the lifting system lifts and lowers once, and set the adjustment process for each full rotation of the adjusting bolt of the adjusting rod as an adjustment cycle; calculate the number of adjustment cycles required for the position of the all-metal conical screw pump rotor to drop by the compensation amount based on the required compensation amount of the all-metal conical screw pump rotor, and control the lifting system to act according to the calculation result until the position of the all-metal conical screw pump rotor drops by the height of the compensation amount.

5. The intelligent wear compensation method for the all-metal conical screw pump according to claim 1, characterized in that, Controlling the lifting and lowering movement of the lifting system arranged above the well; before the position controller arranged below the well drives the all-metal conical screw pump rotor to drop by the height of the compensation amount driven by the lifting and lowering movement of the lifting system, it further includes: Determining the zero position of the elevator in the lifting system, and determining the positive and negative values of the lifting and lowering of the elevator based on this zero position; determining the disengaging point and the contacting point of the position limiter in the position controller.

6. The intelligent wear compensation method for the all-metal conical screw pump according to claim 2, characterized in that Judging whether the decrease ratio of the liquid output volume under the current oil-water ratio reaches the set value; If the judgment result is yes, it is determined that the all-metal conical screw pump is worn, specifically including: Set the decrease ratio of the liquid output volume from small to large as level 1, level 2, and level 3, and judge whether the decrease ratio of the liquid output volume under the current oil-water ratio reaches level 3. If it reaches level 3, it is determined that the all-metal conical screw pump is worn.

7. An intelligent wear compensation system for an all-metal conical screw pump, characterized in that, This system includes a lifting system, a position controller, and a central control system, and uses the all-metal conical screw pump wear intelligent compensation method described in claim 1 to complete the wear compensation of the all-metal conical screw pump.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the all-metal conical screw pump wear intelligent compensation method described in claim 1.

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