Cleaning device for drilling petroleum pipeline screw protector and using method of cleaning device

Abstract

The invention discloses a cleaning device for a drilling petroleum pipeline screw protector and a using method thereof, and relates to the field of petroleum equipment cleaning. According to the cleaning device for the drilling petroleum pipeline screw protector and the using method of the cleaning device, the cleaning device comprises a cleaning unit, a steam generator and a blow-down tank are arranged on one side of the cleaning unit, and a servo motor and a plc controller are arranged on the other side of the cleaning unit. According to the cleaning device for the drilling petroleum pipeline screw protector and the using method of the cleaning device, a roller and steam cleaning scheme is adopted, the cleaning speed is higher, the cleaning steps are simplified, meanwhile, the cleaning effect is better, an intelligent algorithm is written into a plc controller, the oil contamination concentration in a cleaning product oil-water mixture is periodically detected, and the cleaning efficiency is improved. The dirt degree and the cleaning speed of the workpiece are judged, then the rotating speed of the roller, the steam temperature and the internal pressure of the tank body are adjusted, and therefore on the premise that the cleaning effect is achieved, the comprehensive energy-saving effect is achieved by balancing the overall energy consumption and the loss of a sealing piece in the tank body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil equipment cleaning, in particular to a cleaning device for drilling oil pipeline thread protection and a use method thereof. BACKGROUND

[0002] In the exploitation operation of land oil field, with the continuous development of exploitation technology, the exploitation depth is deepening day by day, and at present it has basically reached more than 8000 meters. In the oil transportation link, about 10 meters long oil pipeline is usually used, and these pipelines are connected through thread protection. The amount of thread protection used in the thread protection operation of each exploitation equipment is about 800. However, in the process of oil transportation, the connection of the oil pipeline is prone to clogging. Once clogging occurs, oil production operation must be temporarily suspended, and at this time the oil pipeline and thread protection need to be cleaned and repaired. When cleaning the thread protection, it is found that oil impurities are left on the surface of the thread protection screw.

[0003] The existing thread protection cleaning method mainly has the following disadvantages: the traditional cleaning method generally adopts manual cleaning or simple blowing device. Manual cleaning not only has very low efficiency, but also the cleaning effect is affected by the skill level and working state of the operator, which is very unstable; the simple blowing device also cannot effectively remove the stubborn impurities in the thread protection screw. These inefficient and unstable cleaning methods will affect the precision of the screw, and then affect the subsequent assembly quality, which may cause problems such as loose connection of the pipeline and oil leakage.

[0004] In addition, the existing thread protection cleaning equipment is mostly single-process operation, that is, only one kind of cleaning action can be completed at a time. This makes the equipment need to be matched with multiple devices in actual use to complete the entire cleaning process, resulting in large space occupation of the equipment. At the same time, the operation process is complex and requires multiple operators to work together, which not only increases the labor cost, but also due to the large area occupied by the equipment, it also brings inconvenience to other operations in the limited operation space of the oil field, reducing the overall operation efficiency. Therefore, a cleaning device for drilling oil pipeline thread protection and a use method thereof are provided. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a cleaning device for drilling oil pipeline thread protection and a use method thereof, which solves the problems of large number of thread protections in the existing oil pipeline, large degree of pollution, low cleaning efficiency, multiple cleaning processes and poor cleaning effect.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a cleaning device for drilling oil pipeline thread protection, comprising a cleaning unit, a steam generator and a sewage tank are arranged on one side of the cleaning unit, a servo motor and a plc control machine are arranged on the other side of the cleaning unit;

[0007] The cleaning unit comprises a tank body and a sealable cover installed on the top of the tank body, the inside of the tank body is rotationally provided with a roller, the servo motor is in transmission connection with the roller, the steam generator is in communication with the inside of the roller, the blowdown tank is in communication with the inner bottom of the tank body, the seal cover is installed with a pressure gauge, the tank body is installed with a pressure relief valve, and the blowdown tank is installed with an oil concentration on-line monitor.

[0008] The PLC control machine controls the pressure relief valve, servo motor and steam generator by acquiring the data of the oil concentration on-line monitor and pressure gauge, so as to balance the cleaning rate and energy consumption.

[0009] Preferably, support shaft sleeves are fixedly welded at both ends of the tank body, the inside of the support shaft sleeves is rotationally provided with transmission support shafts, the roller is installed between the two groups of transmission support shafts, the outer end of one group of transmission support shafts is connected with the servo motor, and the other group of transmission support shafts is in communication with the steam generator.

[0010] Preferably, the roller comprises a hollow cylinder and a discharging cover installed on the hollow cylinder, the inside of the hollow cylinder is fixedly provided with a steam jet pipe, the two ends of the steam jet pipe extend to the outside of the hollow cylinder and are integrally formed with connecting blocks respectively, the connecting blocks are movably clamped in the transmission support shafts, so that the transmission support shafts and the steam jet pipe are coaxially installed.

[0011] Preferably, rubber sealing sleeves are assembled between the transmission support shafts and the support shaft sleeves, the inner end of the transmission support shaft is provided with an assembly groove, the connecting blocks are movably clamped in the assembly groove, and arc-shaped clamping plates for fixing the connecting blocks are installed on the outside of the assembly groove through bolts.

[0012] Preferably, a rotary sealing joint is fixedly installed at the outer end of one group of support shaft sleeves, the outer end of the rotary sealing joint is connected with the steam generator, a connecting plug is integrally formed in one group of assembly grooves, a steam channel is formed in the connecting plug, the steam channel extends to the outer end of the transmission support shaft, the inner end of the rotary sealing joint is in communication with the steam channel, and the inside of one group of connecting blocks is provided with a jack that is matched with the connecting plug, so that the steam generator is in communication with the inside of the steam jet pipe.

[0013] Preferably, a sealing protrusion is integrally formed at the top of the tank body, a sealing recess matched with the sealing protrusion is formed in the seal cover, and a sealing rubber strip is installed in the sealing recess, connecting plates for fixation are respectively welded on the tank body and the seal cover, and the two groups of connecting plates are installed through bolts.

[0014] Preferably, one side of the tank body is fixedly provided with a support table, a transmission seat is fixedly assembled on the support table, the servo motor is fixedly arranged on one side of the transmission seat, a group of transmission support shafts are movably inserted into the transmission seat, and the transmission support shafts and the output end of the servo motor are connected through a shaft coupling.

[0015] Preferably, the bottom of the tank body is integrally formed with a sewage collecting groove, a sewage discharge pipe is arranged between the sewage collecting groove and the sewage tank, a pressure relief pipe is arranged between the upper end of the tank body and the sewage collecting groove, a pressure relief valve is arranged on the pressure relief pipe, a sewage pump is arranged on the sewage discharge pipe, and an electromagnetic discharge valve is arranged on the outside of the sewage tank.

[0016] Preferably, a method for using a cleaning device for a drilling oil pipeline protector comprises the following steps:

[0017] S1, feeding, starting the equipment, rotating the roller, and at the same time, the steam generator introduces high-temperature steam into the inside, the pressure in the tank body is increased, and the pressure is controlled through the pressure relief valve;

[0018] S2, the sewage pump is started regularly, and the oil-water mixture is pumped out, and the oil concentration on-line monitor detects the oil concentration;

[0019] S3, the PLC control machine judges the material dirtiness according to the first oil concentration, and adjusts the roller speed V, the steam temperature T and the pressure P in the tank body;

[0020] S4, the sewage pump is started again, and the oil concentration on-line monitor detects the oil concentration again;

[0021] S5, the PLC control machine judges the material cleaning rate according to the oil concentration, and adjusts the roller speed V, the steam temperature T and the pressure P in the tank body according to the cleaning rate;

[0022] S6, when the oil concentration decreases to below the threshold value, the cleaning is completed, the equipment is stopped, and the sealing cover is opened to discharge the material.

[0023] Preferably, the PLC control machine is written with an intelligent algorithm, and in the intelligent algorithm:

[0024] L, the part dirtiness is L, the cleaning efficiency is S, the total energy consumption is Q, the sealing element life loss is D, and the cleaning time is t;

[0025] The detection period of the oil concentration on-line monitor is designed as Δt=5min;

[0026] Detection parameters; the oil concentration C of the nth discharged sewage n (n=0, 1, 2, …, C0 is the initial concentration);

[0027] Control parameters; the roller speed V n+1 , the steam temperature Tn+1 and internal pressure P n+1 ;

[0028] Target parameters; final oil concentration C 目标 Maximum allowed period N max (Total duration ≤ 5N) max );

[0029] S11. Initial detection: Upon startup, detect C0, calculate and determine the turbidity level L based on C0, call the corresponding initial V, T, and P, and determine the total energy consumption threshold Q based on the amount of oil contamination C0. max Maximum permissible loss of seal D max ;

[0030] S21. Efficiency monitoring, real-time calculation of current efficiency. If S is lower than expected, it will cause t to increase. V, T and P will be adjusted according to priority.

[0031] S31. Energy consumption control: If the total energy consumption Q exceeds Q... max Then, the parameters of V, T, and P are adjusted according to their priority.

[0032] S41, Sealing protection, if D is close to D max If so, prioritize reducing P or increasing T and V to increase S, thereby shortening t;

[0033] S51. Termination condition: When C t ≤C 目标 Stop cleaning and record the optimal parameters.

[0034] Its beneficial effects are as follows:

[0035] 1. The cleaning device for drilling oil pipeline wire protectors uses a drum installed inside the tank, which is connected to a steam generator. During use, the drum rotates continuously while steam is continuously sprayed, causing oil stains on the workpiece surface to flow downwards into the sludge collection tank under the influence of steam, pressure, and tumbling effect. At the same time, the steam condenses into water and flows downwards into the sludge collection tank. The oil stains are periodically pumped into the sludge discharge tank by a sludge pump. Compared with traditional cleaning methods, this device has fewer cleaning steps, higher cleaning efficiency, and better cleaning effect.

[0036] 2. The method of using the cleaning device for drilling oil pipeline wire protection involves writing an intelligent algorithm into the PLC control computer. By periodically detecting the oil concentration in the oil-water mixture of the cleaning product, the device determines the turbidity of the workpiece and the subsequent oil cleaning speed. Then, it adjusts the drum speed, steam temperature, and internal pressure of the tank. In this way, while ensuring the cleaning effect, it balances the overall energy consumption and the wear of the seals in the tank to achieve a comprehensive energy-saving effect. Attached Figure Description

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0038] Figure 1 The schematic diagram of the outer surface structure of the cleaning device of the present application is shown in the figure.

[0039] Figure 2 The schematic diagram of the back surface structure of the cleaning device of the present application is shown in the figure.

[0040] Figure 3 The schematic diagram of the internal structure of the cleaning device of the present application is shown in the figure.

[0041] Figure 4 The schematic diagram of the structure of the tank and the roller of the present application is shown in the figure.

[0042] Figure 5 The sectional view of the internal structure of the tank of the present application is shown in the figure.

[0043] Figure 6 The enlarged view of the A part structure of the present application is shown in the figure. Figure 5

[0044] Figure 7 The schematic diagram of the outer surface structure of the roller of the present application is shown in the figure.

[0045] Figure 8 The flow chart of the use method of the cleaning device of the present application is shown in the figure.

[0046] In the figure: 1, cleaning unit; 11, tank; 12, sealing cover; 13, pressure gauge; 14, roller; 141, hollow cylinder; 142, steam jet pipe; 143, unloading cover; 144, connecting block; 145, jack; 15, connecting plate; 16, sealing recess; 17, sealing protrusion; 18, support shaft sleeve; 19, transmission support shaft; 192, assembly groove; 193, rotary sealing joint; 194, rubber sealing sleeve; 195, connecting plug; 196, steam passage; 110, sewage collecting tank; 111, arc-shaped clamping plate; 2, steam generator; 3, servo motor; 32, support table; 33, transmission seat; 4, sewage tank; 42, sewage pipe; 43, sewage pump; 44, pressure relief pipe; 45, pressure relief valve; 46, oil concentration on-line monitor; 47, electromagnetic discharge valve; 5, PLC control machine. DETAILED DESCRIPTION

[0047] ​In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0048] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0049] Embodiment one, the present application discloses a kind of cleaning device of drilling oil pipeline thread protector, according to the attached Figures 1-7 As shown, including cleaning unit 1, one side of cleaning unit 1 is equipped with steam generator 2 and blowdown tank 4, the other side of cleaning unit 1 is equipped with servo motor 3 and plc control machine 5;

[0050] Cleaning unit 1 includes tank body 11 and the seal cover 12 that can be opened and installed on the top of tank body 11, the inside of tank body 11 is rotatably provided with roller 14, servo motor 3 is drivingly connected with roller 14, steam generator 2 is connected with the inside of roller 14, blowdown tank 4 is connected with the inner bottom of tank body 11, pressure gauge 13 is installed on seal cover 12, pressure relief valve 45 is installed on tank body 11, oil concentration on-line monitor 46 is installed in blowdown tank 4;

[0051] Plc control machine 5 controls pressure relief valve 45, servo motor 3 and steam generator 2 by obtaining oil concentration on-line monitor 46 and pressure gauge 13 data, to balance cleaning rate and energy consumption.

[0052] Both ends of tank body 11 are fixedly welded with support shaft sleeve 18, transmission support shaft 19 is rotatably arranged in the inside of support shaft sleeve 18, roller 14 is installed between two groups of transmission support shafts 19, the outer end of one group of transmission support shafts 19 is connected with servo motor 3, and the other group of transmission support shafts 19 is communicated with steam generator 2.

[0053] Roller 14 includes hollow cylinder body 141 and unloading baffle cover 143 installed on hollow cylinder body 141, steam jet pipe 142 is fixedly arranged in the inside of hollow cylinder body 141, connection block 144 is integrally formed with the outside of both ends of steam jet pipe 142 respectively, connection block 144 is movably clamped in transmission support shaft 19, so that transmission support shaft 19 and steam jet pipe 142 are coaxially installed.

[0054] A rubber sealing sleeve 194 is assembled between the transmission support shaft 19 and the support shaft sleeve 18, an assembly groove 192 is formed in the inner end of the transmission support shaft 19, the connecting block 144 is movably clamped in the assembly groove 192, and the outer part of the assembly groove 192 is provided with an arc-shaped clamping plate 111 for fixing the connecting block 144 by bolt installation.

[0055] The outer end of the support shaft sleeve 18 is fixedly provided with a rotary sealing joint 193, the outer end of the rotary sealing joint 193 is connected with the steam generator 2, the connecting plug 195 is integrally formed in the assembly groove 192, the steam passage 196 is formed in the connecting plug 195, the steam passage 196 extends to the outer end of the transmission support shaft 19, the inner end of the rotary sealing joint 193 is communicated with the steam passage 196, and the inner part of the connecting block 144 is provided with the insertion hole 145 matched with the connecting plug 195, so that the steam generator 2 is communicated with the inside of the steam nozzle 142.

[0056] The sealing protrusion 17 is integrally formed on the top of the tank body 11, the sealing recess 16 matched with the sealing protrusion 17 is formed on the sealing cover 12, and the sealing rubber strip is installed in the sealing recess 16, and the connecting plates 15 for fixing are respectively welded on the tank body 11 and the sealing cover 12, and the two groups of connecting plates 15 are installed by bolts.

[0057] The support table 32 is fixedly arranged on one side of the tank body 11, the transmission seat 33 is fixedly assembled on the support table 32, the servo motor 3 is fixedly arranged on one side of the transmission seat 33, and the transmission support shaft 19 is movably inserted into the transmission seat 33, and the transmission support shaft 19 and the output end of the servo motor 3 are connected by the shaft coupling.

[0058] The sewage collecting tank 110 is integrally formed on the bottom of the tank body 11, the sewage pipe 42 is installed between the sewage collecting tank 110 and the sewage tank 4, the pressure relief pipe 44 is installed between the upper end of the tank body 11 and the sewage collecting tank 110, the pressure relief valve 45 is installed on the pressure relief pipe 44, the sewage pump 43 is installed on the sewage pipe 42, and the electromagnetic discharge valve 47 is installed on the outer side of the sewage tank 4.

[0059] Working principle; when the device is used, the workpiece to be cleaned is put into the inside of the roller 14, then the roller 14 is installed in the inside of the tank body 11, the connecting block 144 is inserted into the assembly groove 192, the connecting plug 195 is inserted into the insertion hole 145, the arc-shaped clamping plate 111 is installed on the outer wall of the connecting block 144 and the transmission support shaft 19 at this time, the roller 14 is fixedly installed between the two groups of transmission support shafts 19, and then the sealing cover 12 is closed.

[0060] The device is started by the PLC control machine 5, at this time, the servo motor 3 drives the drum 14 to rotate inside the tank 11 through a set of transmission support shafts 19, and the steam generator 2 introduces high-temperature steam into the inside of the tank 11, the steam enters the steam channel 196 through the rotary sealing joint 193, and then enters the steam injection pipe 142 through the connecting plug 195 to spray steam into the inside of the drum 14, at this time, the drum 14 rotates continuously, and the steam is continuously sprayed, at this time, the pressure in the inside of the tank 11 rises, and the pressure value is observed through the pressure gauge 13, when the pressure is too high, the pressure is released to the inside of the blowdown tank 4 through the pressure relief valve 45;

[0061] During the cleaning process, the oil stains on the surface of the workpiece flow downward into the oil collection tank 110 under the effect of steam, pressure and tumbling, and the steam condenses into water and flows downward into the oil collection tank 110, the oil stains are pumped into the blowdown tank 4 through the blowdown pump 43 at regular intervals, then the oil stain concentration in the discharged oil-water mixture is monitored through the oil concentration on-line monitor 46, then the PLC control machine 5 adjusts the rotation speed of the servo motor 3, the steam temperature and the internal pressure of the tank 11 according to the oil stain concentration, so as to ensure effective cleaning of the oil stains, avoid damage to the sealing parts in the whole tank 11 caused by excessive internal pressure and too long cleaning time, and avoid increasing the overall cleaning cost caused by too high rotation speed of the servo motor 3, too high steam temperature and too long overall cleaning time.

[0062] Embodiment two, the use method of the cleaning device for the drilling oil pipeline protective wire is disclosed, according to the attached Figures 1-8 as shown, comprising the following steps:

[0063] S1, feeding, starting the device, rotating the drum 14, at the same time, the steam generator 2 introduces high-temperature steam into the inside, the pressure in the inside of the tank 11 rises, and the pressure is controlled through the pressure relief valve 45;

[0064] S2, the blowdown pump 43 is started at regular intervals, and the oil-water mixture is pumped out, and the oil stain concentration is detected by the oil concentration on-line monitor 46;

[0065] S3, the PLC control machine 5 judges the material dirtiness according to the first oil stain concentration, and then adjusts the rotation speed V of the drum 14, the steam temperature T and the internal pressure P of the tank 11;

[0066] S4, the blowdown pump 43 is started again, and the oil stain concentration is detected again by the oil concentration on-line monitor 46;

[0067] S5, the PLC control machine 5 judges the material cleaning rate according to the oil stain concentration, and adjusts the rotation speed V of the drum 14, the steam temperature T and the internal pressure P of the tank 11 according to the cleaning rate;

[0068] S6, the oil stain concentration decreases to below the threshold value, the cleaning is completed, the device is stopped, and the sealing cover 12 is opened to discharge the material.

[0069] Working principle; the core variables and cycle detection logic of the method are as follows;

[0070] Detection control period is 5 minutes, Δt = 5 min;

[0071] Detection parameters; the nth time of sewage oil concentration C n (n = 0, 1, 2, …, C0 is the initial concentration);

[0072] Control parameters; the n+1 cycle of the drum speed V n+1 , steam temperature T n+1 and internal pressure P n+1 ;

[0073] Target parameters; the final oil concentration C 目标 , the maximum allowable period N max (total duration ≤5N max );

[0074] S11, initial detection, detect C0 at startup, calculate the pollution level L according to C0, call the corresponding initial V, T and P, determine the total energy consumption threshold Q max according to the oil pollution amount C0, and the maximum allowable loss of the sealing element D max ;

[0075] S21, efficiency monitoring, real-time current If S is lower than expected, increase t, and adjust V, T and P according to priority;

[0076] S31, energy consumption control, if the total energy consumption Q exceeds Q max , adjust V, T and P according to priority;

[0077] S41, sealing protection, if D is close to D max , preferentially reduce P or increase T and V to increase S to shorten t;

[0078] S51, termination condition, when C t ≤ C 目标 , stop cleaning, and record the optimal parameters.

[0079] Wherein;

[0080] Cleaning efficiency dynamic equation

[0081] The actual cleaning efficiency S n of each cycle is calculated from the concentration change;

[0082]

[0083] Where C n-1 represents the sewage oil concentration of the previous cycle;

[0084] The correlation equation between efficiency and parameters is:

[0085]

[0086] Where S0 is the reference efficiency; V0, T0 and P0 are the initial rotation speed, steam temperature and internal pressure;

[0087] α, β, λ ∈ [0, 1], representing the contribution index of each control parameter in cleaning efficiency;

[0088] Parameter adjustment target equation

[0089] Let the target efficiency of the n+1 period be The remaining cleaning demand needs to be met;

[0090]

[0091] Where δ represents the safety margin, and δ > 0; and according to the target efficiency of each period, the rotation speed of the drum, the steam temperature and the internal pressure in the period are adjusted;

[0092] Energy consumption constraint equation;

[0093] According to the first detected oil concentration, the total oil amount is determined, and then the threshold of total energy consumption is determined as Q max , and the single period energy consumption equation is:

[0094]

[0095] Cumulative energy consumption constraint;

[0096]

[0097] Where K1, K2 are energy consumption coefficients, which are calculated by measuring the actual energy consumption of the equipment under different V, T, P;

[0098] Seal life constraint equation

[0099] Single period life loss equation;

[0100] D n = K3P n · Δt

[0101] Cumulative loss constraint;

[0102]

[0103] Where K3 is the loss coefficient of the seal, which is obtained by testing the performance decline of the used seal under different pressures, and D max represents the maximum allowed loss;

[0104] By solving the dynamic equation of cleaning efficiency, the parameter adjustment target equation, the energy consumption constraint equation and the sealing life constraint equation, according to the target efficiency Back-propagating the parameter adjustment amount, and by proportionally assigning the economic value of energy consumption Q and sealing loss D as 1: F, then the total economic consumption M = Q + FD in a single cleaning process, by equation solving;

[0105] When C≤C 目标 ;

[0106] The minimum value of M is obtained, which is the most economical cleaning scheme;

[0107] The minimum value of t is obtained, which is the fastest cleaning efficiency scheme.

[0108] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations exist in any such actual relationship or order. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0109] The basic principles and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for cleaning a drilling oil pipe thread protector, comprising a cleaning unit (1), characterized in that, One side of the cleaning unit (1) is provided with a steam generator (2) and a blowdown tank (4), and the other side of the cleaning unit (1) is provided with a servo motor (3) and a PLC control machine (5); The cleaning unit (1) comprises a tank body (11) and a seal cover (12) which is installed on the top of the tank body (11) and can be opened, a roller (14) is rotatably arranged in the tank body (11), the servo motor (3) is in transmission connection with the roller (14), the steam generator (2) is in communication with the inside of the roller (14), the blowdown tank (4) is in communication with the inner bottom of the tank body (11), a pressure gauge (13) is installed on the seal cover (12), a pressure relief valve (45) is installed on the tank body (11), and an oil concentration on-line monitor (46) is installed in the blowdown tank (4); The PLC control machine (5) controls the pressure relief valve (45), the servo motor (3) and the steam generator (2) by acquiring the data of the oil concentration on-line monitor (46) and the pressure gauge (13), so as to balance the cleaning rate and energy consumption.

2. A device for cleaning a wellbore servicing oil pipe string according to claim 1, characterized in that Both ends of the tank body (11) are fixedly welded with support shaft sleeves (18), transmission support shafts (19) are rotatably arranged in the inside of the support shaft sleeves (18), the roller (14) is installed between the two groups of transmission support shafts (19), the outer end of one group of transmission support shafts (19) is connected with the servo motor (3), and the other group of transmission support shafts (19) is in communication with the steam generator (2).

3. A device for cleaning a wellbore servicing oil pipe string according to claim 2, characterized in that The roller (14) comprises a hollow cylinder body (141) and a discharging cover (143) installed on the hollow cylinder body (141), a steam jet pipe (142) is fixedly arranged in the inside of the hollow cylinder body (141), the two ends of the steam jet pipe (142) extend to the outside of the hollow cylinder body (141) and are integrally formed with connecting blocks (144) respectively, the connecting blocks (144) are movably clamped in the transmission support shafts (19), so that the transmission support shafts (19) and the steam jet pipe (142) are coaxially installed.

4. A device for cleaning a wellbore servicing tubing string as defined in claim 3, wherein A rubber sealing sleeve (194) is assembled between the transmission support shaft (19) and the support shaft sleeve (18), an assembly groove (192) is formed in the inner end of the transmission support shaft (19), the connecting block (144) is movably clamped in the assembly groove (192), and arc-shaped clamping plates (111) for fixing the connecting block (144) are installed on the outside of the assembly groove (192) through bolts.

5. A device for cleaning a wellbore servicing oil pipe string according to claim 4, characterized in that The outer end of a group of the support sleeves (18) is fixedly provided with a rotary sealing joint (193), the outer end of the rotary sealing joint (193) is connected with the steam generator (2), a connecting plug (195) is integrally formed in a group of the assembly grooves (192), a steam passage (196) is formed in the connecting plug (195), the steam passage (196) extends to the outer end of the transmission support shaft (19), the inner end of the rotary sealing joint (193) is connected with the steam passage (196), and the inner part of a group of the connecting blocks (144) is provided with a plug hole (145) matched with the connecting plug (195), so that the steam generator (2) is connected with the inner part of the steam nozzle (142).

6. The apparatus of claim 1 wherein, The top of the tank body (11) is integrally provided with a sealing protrusion (17), the sealing cover (12) is provided with a sealing recess (16) matched with the sealing protrusion (17), and a sealing rubber strip is arranged in the sealing recess (16), and the tank body (11) and the sealing cover (12) are respectively provided with a connecting plate (15) for fixation, and the two groups of connecting plates (15) are connected by bolts.

7. The apparatus of claim 1 wherein, The side of the tank body (11) is fixedly provided with a support table (32), the support table (32) is fixedly provided with a transmission seat (33), the servo motor (3) is fixedly arranged on one side of the transmission seat (33), and a group of the transmission support shafts (19) are movably inserted into the transmission seat (33), and the transmission support shafts (19) and the output end of the servo motor (3) are connected by a shaft coupling.

8. The apparatus of claim 1 wherein, The bottom of the tank body (11) is integrally provided with a sewage collecting groove (110), a sewage discharge pipe (42) is arranged between the sewage collecting groove (110) and the sewage tank (4), a pressure relief pipe (44) is arranged between the upper end of the tank body (11) and the sewage collecting groove (110), a pressure relief valve (45) is arranged on the pressure relief pipe (44), a sewage pump (43) is arranged on the sewage discharge pipe (42), and an electromagnetic discharge valve (47) is arranged on the outer side of the sewage tank (4).

9. A method of using a well tubing string cleaning device according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, feeding, starting the equipment, rotating the roller (14), and introducing high-temperature steam into the inside of the steam generator (2), so that the pressure in the inside of the tank body (11) is increased, and the pressure is controlled by the pressure relief valve (45); S2, the sewage pump (43) is started at a fixed time, and the oil-water mixture is pumped and discharged, and the oil pollution concentration is detected by the oil concentration on-line monitor (46); S3, the first oil pollution concentration is used to judge the material pollution concentration, and then the roller (14) rotating speed V, the steam temperature T and the pressure P in the inside of the tank body (11) are adjusted; S4, the sewage pump (43) is started again, and the oil pollution concentration is detected again by the oil concentration on-line monitor (46); S5, the oil pollution concentration is used to judge the material cleaning rate, and the roller (14) rotating speed V, the steam temperature T and the pressure P in the inside of the tank body (11) are adjusted according to the cleaning rate; S6, when the oil pollution concentration is reduced to below a threshold value, the cleaning is completed, the equipment is stopped, and the sealing cover (12) is opened to discharge the material.

10. The method of using a cleaning device for a well drilling oil country tubular good as claimed in claim 9, wherein, The intelligent algorithm written in the PLC control machine (5) has: Let, the part dirtiness is L, the cleaning efficiency is S, the total energy consumption is Q, the sealing life loss is D, and the cleaning time is t; The design oil concentration on-line monitor (46) detects the period, and Δt=5 min; Detection parameter; nth time sewage oil concentration C n , (n=0, 1, 2, …, C0is initial concentration) Regulation parameters; drum speed V of the n+1 period n+1 , vapor temperature T n+1 and internal pressure P n+1 ; Target parameter; final oil concentration C 目标 , maximum period N max allowed (overall duration ≤ 5N max ) S11, initial detection, detecting C0 at start, calculating the dirtiness level L according to C0, calling the corresponding initial V, T and P, determining the threshold of total energy consumption Q according to the oil dirt amount C0 max , maximum allowable loss of seal D max ; S21, efficiency monitoring, real-time calculation of the current If S is lower than expected, it leads to an increase in t, and parameter adjustment of V, T and P is performed according to priority. S31, energy consumption control, if the total energy consumption Q exceeds Q max , then the parameters of V, T and P are adjusted according to the priority respectively; S41, seal protection, if D approaches D max then preferentially reduce P or raise T and V to increase S to shorten t; S51, termination condition, when C t ≤ C 目标 , stop cleaning, record optimal parameters.

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