Wellhead heat preservation pigging process device suitable for low-temperature environment

Abstract

The invention relates to the technical field of oil well exploitation equipment, in particular to a wellhead heat preservation pigging process device suitable for a low-temperature environment, which comprises an oil inlet pipe and an oil outlet pipe, a first control valve is arranged on the oil inlet pipe, and a water seepage pipe communicated with the oil inlet pipe is arranged at a position, close to the oil outlet pipe, of the control valve. A first control valve is arranged on the water seepage pipe, a second control valve is arranged on the water seepage pipe, a first heat preservation assembly is arranged between the first control valve and the water seepage pipe, a second heat preservation assembly is arranged on the oil outlet pipe, and a driving piece is erected on the side of the oil outlet pipe and is in transmission connection with the second heat preservation assembly. A viscous oil cleaning assembly is arranged at the position, close to the oil outlet pipe, of the second heat preservation assembly, the first heat preservation assembly is used for conducting heat treatment on crude oil just entering the oil extraction pipeline to reduce the viscosity of the crude oil, and the driving piece drives the second heat preservation assembly to work to conduct heat treatment on the oil outlet pipe so as to keep the mixing temperature of hot water and the crude oil. The crude oil extraction quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil well mining equipment, and in particular to a wellhead heat preservation and cleaning process device suitable for low-temperature environments. Background Art

[0002] According to the requirements of oil production process, wellhead flow devices are installed on the oilfield wellhead device and the lateral outlet of the Christmas tree, and valves are used to control the flow direction and flow of fluid media in various pipelines to meet the requirements of different production processes. The well field pipelines installed with valves are crisscrossed, and the functional valves are installed in a dispersed manner, occupying a large area, with a large installation workload, serious oil theft, and difficult production management; especially in the low temperature environment of northern oil and gas fields, the pipelines are prone to freezing and blocking. To solve these problems, annular wellhead flow devices have been widely used in some blocks of oil fields that use annular gathering and transportation technology.

[0003] The annular wellhead process device currently used adds hot water through water seepage to mix with crude oil in order to reduce the viscosity of the crude oil and prevent freezing. However, crude oil in the pipeline that has not been mixed with hot water is affected by the low temperature environment and also has the problem of freezing. At the same time, hot water will lose some heat during the flow of the pipeline, and there is a deviation between its actual temperature and the set temperature, which makes it easy for oil to stick and freeze inside the pipeline. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a wellhead insulation and pipe cleaning process device suitable for low-temperature environments, so as to solve the problem that the temperature inside the pipeline is difficult to control in a low-temperature environment, and oil sticking and freezing blockage are prone to occur in the existing wellhead process device by adding hot water through seepage.

[0005] Based on the above purpose, the present invention provides a wellhead insulation cleaning process device suitable for low-temperature environment, comprising an oil inlet pipe and an oil outlet pipe, one end of the oil inlet pipe is connected with one end of the oil outlet pipe to form an oil production pipeline, a first control valve is installed on the oil inlet pipe, a seepage pipe connected with the oil inlet pipe is provided at a place of the control valve close to the oil outlet pipe, a second control valve is installed on the seepage pipe, a first insulation component is installed between the first control valve and the seepage pipe, a second insulation component is installed on the oil outlet pipe, a driving member is mounted on the side of the oil outlet pipe, an input end of the driving member is connected with the first insulation component, an output end of the driving member is transmission-connected with the second insulation component, a sticky oil cleaning component is provided at a place of the second insulation component close to the oil outlet pipe, the sticky oil cleaning component is rotatably connected and arranged on the oil outlet pipe, and the sticky oil cleaning component is transmission-connected with the driving member; Among them, the first insulation component is used to heat treat the crude oil that has just entered the oil production pipeline to reduce the viscosity of the crude oil. The driving component is started through the first insulation component and drives the second insulation component to work to heat treat the oil outlet pipe to maintain the temperature of the mixture of hot water and crude oil.

[0006] Preferably, the first heat preservation component comprises: A heat preservation box, sleeved on the oil inlet pipe; A gas heater is mounted on one side of the thermal insulation box; A hollow spiral tube is arranged inside the insulation box, the hollow spiral tube is wound around the oil inlet pipe, the input end of the hollow spiral tube passes through the outside of the insulation box and is fixedly connected to the air outlet of the gas heater, the output end of the hollow spiral tube is connected to the input end, and an exhaust pipe is connected to the output end of the hollow spiral tube. The exhaust pipe is passed through the outside of the insulation box, and the diameter of the exhaust pipe is smaller than the diameter of the hollow spiral tube.

[0007] Preferably, a water inlet pipe is provided on one side of the heat preservation box, and a water outlet pipe is provided on the other side, the water inlet pipe is connected to the water seepage pipe, and the water outlet pipe is connected to a portion of the oil inlet pipe close to the oil outlet pipe.

[0008] Preferably, a plurality of elastic balls are provided inside the hollow spiral tube, a plurality of inclined springboards are fixedly provided inside the half spiral portion of the hollow spiral tube away from the input end, and a material retaining net is provided at the bottom of the exhaust pipe, wherein the elastic balls move in the hollow spiral tube under the push of hot gas and are irregularly ejected under the action of the springboard to generate heat by collision and friction in the hollow spiral tube.

[0009] Preferably, the bouncy ball comprises: A sphere, the surface of which is provided with a plurality of mounting grooves; A plurality of protrusions are respectively arranged in the installation grooves, and one end of each of the protrusions extends out of the surface of the sphere; A plurality of first springs are respectively arranged inside the installation groove, and two ends of each of the first springs respectively abut against the groove bottom and the convex head of the installation groove.

[0010] Preferably, the second heat preservation component comprises: A heat-conducting tube, which is sleeved on the oil outlet pipe, and the heat-conducting tube is fixedly connected to the oil outlet pipe; A heat preservation tube is sleeved on the heat conducting tube, one end of the heat preservation tube is rotatably connected to the oil outlet pipe, and the other end is transmission-connected to the driving member, and a heat preservation cavity is formed between the heat preservation tube and the heat conducting tube; A plurality of friction rollers are arranged in the heat preservation chamber, and each of the friction rollers is attached to the outer wall of the heat-conducting cylinder; A plurality of support frames are respectively arranged at a position of the friction roller away from the heat-conducting cylinder, two ends of each of the support frames are respectively rotatably connected to the two ends of the friction roller, two ends of each of the support frames are slidably connected and provided with a limiting slide, one end of each of the limiting sliding sleeves is fixedly connected to the inner wall of the heat-insulating cylinder, and a plurality of second springs are fixedly provided on the side of each of the support frames away from the friction roller, one end of each of the second springs is fixedly connected to the support frame, and the other end is against the inner wall of the heat-insulating cylinder.

[0011] Preferably, a guide rod is provided in the second spring, one end of the guide rod is fixedly connected to the support frame, and the other end is passed through the outside of the heat insulation tube, and the length of the guide rod passing through the heat insulation tube is equal to the wall thickness of the heat conductive tube.

[0012] Preferably, the driving member comprises: An impeller mechanism is mounted beside the heat preservation cylinder, and an air inlet of the impeller mechanism is connected to the exhaust pipe; A first gear, the center of which is fixedly connected to the shaft of the impeller mechanism; The second gear is sleeved on the oil outlet pipe, the second gear is fixedly connected to one end of the heat preservation tube, and the second gear is meshed with the first gear.

[0013] Preferably, the sticky oil cleaning component comprises: A connecting pipe is arranged at the connection between the oil inlet pipe and the oil outlet pipe, and the two ends of the connecting pipe are respectively sleeved on the oil inlet pipe and the oil outlet pipe, and the two ends of the connecting pipe are respectively rotatably connected with the oil inlet pipe and the oil outlet pipe, and the inner diameter of the connecting pipe is the same as the inner diameter of the oil inlet pipe and the oil outlet pipe; An oil scraper is fixed on the inner wall of the connecting pipe, and two ends of the oil scraper extend to a certain length toward the oil inlet pipe and the oil outlet pipe respectively; A reducer is mounted beside the connecting pipe, the input end of the reducer is fixedly connected to the shaft of the impeller mechanism, and the output end of the reducer is fixedly provided with a pulley; A belt has one end sleeved on the outer wall of the connecting pipe and the other end sleeved on the pulley.

[0014] Preferably, the second control valve is provided with a pressure gauge and a thermometer.

[0015] The beneficial effects of the present invention are as follows: the oil inlet pipe is preheated by the first insulation component, the oil inlet pipe is opened by the first control valve to allow crude oil to enter the oil inlet pipe, the crude oil is preheated first to prevent the crude oil from freezing in the oil inlet pipe, the seepage pipe is opened by the second control valve to allow hot water and crude oil to mix and enter the oil outlet pipe, in order to prevent the heat of the hot water from being lost in the oil production pipeline, the first insulation component drives the driving member to work, the driving member drives the second insulation component to work, the second insulation component transfers heat to the oil outlet pipe to maintain the temperature of the crude oil in the oil outlet pipe, and at the same time, the driving member also drives the sticky oil cleaning component to work to process the sticky oil on the inner wall of the oil outlet pipe to improve the quality of crude oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the three-dimensional structure inside the thermal insulation box according to an embodiment of the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the output end of the hollow spiral tube according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the elastic ball according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the sticky oil cleaning component according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure inside the heat preservation cylinder of an embodiment of the present invention; Figure 7 For the embodiment of the present invention Figure 6 Enlarge the structural diagram at A; Figure 8 For the embodiment of the present invention Figure 6 Zoom in on the schematic diagram at B.

[0018] The markings in the figure are: 1. Oil inlet pipe; 2. Oil outlet pipe; 3. First control valve; 4. Seepage pipe; 5. Second control valve; 6. First insulation component; 7. Second insulation component; 8. Driving part; 9. Sticky oil cleaning component; 10. Insulation box; 11. Gas heater; 12. Hollow spiral tube; 13. Exhaust pipe; 14. Water inlet pipe; 15. Water outlet pipe; 16. Elastic ball; 17. Springboard; 18. Material blocking net; 19. Ball; 20. Protrusion; 21. First spring; 22. Heat-conducting tube; 23. Insulation tube; 24. Friction roller; 25. Support frame; 26. Limit slideway; 27. Second spring; 28. Guide rod; 29. ​​Impeller mechanism; 30. First gear; 31. Second gear; 32. Connecting pipe; 33. Oil scraper; 34. Reducer; 35. Pulley; 36. Belt; 37. Pressure gauge; 38. Thermometer. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figures 1 to 8As shown, a wellhead heat preservation and cleaning process device suitable for low temperature environment comprises an oil inlet pipe 1 and an oil outlet pipe 2, one end of the oil inlet pipe 1 is connected with one end of the oil outlet pipe 2 to form an oil production pipeline, a first control valve 3 is installed on the oil inlet pipe 1, a seepage pipe 4 connected with the oil inlet pipe 1 is provided at a place of the control valve close to the oil outlet pipe 2, a second control valve 5 is installed on the seepage pipe 4, a first heat preservation component 6 is installed between the first control valve 3 and the seepage pipe 4, a second heat preservation component 7 is installed on the oil outlet pipe 2, a driving member 8 is mounted on the side of the oil outlet pipe 2, an input end of the driving member 8 is connected with the first heat preservation component 6, an output end of the driving member 8 is transmission-connected with the second heat preservation component 7, a sticky oil cleaning component 9 is provided at a place of the second heat preservation component 7 close to the oil outlet pipe 2, the sticky oil cleaning component 9 is rotatably connected and arranged on the oil outlet pipe 2, and the sticky oil cleaning component 9 is transmission-connected with the driving member 8; Among them, the first insulation component 6 is used to heat treat the crude oil just entering the oil production pipeline to reduce the viscosity of the crude oil. The driving component 8 is started by the first insulation component 6 and drives the second insulation component 7 to work to heat treat the oil outlet pipe 2 to maintain the temperature of the mixture of hot water and crude oil.

[0022] For example, the oil inlet pipe 1 is preheated by the first insulation component 6, and the oil inlet pipe 1 is opened by the first control valve 3 to allow crude oil to enter the oil inlet pipe 1. The crude oil is preheated first to prevent the crude oil from freezing in the oil inlet pipe 1. The seepage pipe 4 is opened by the second control valve 5 to allow hot water and crude oil to mix and enter the oil outlet pipe 2. In order to prevent the heat of the hot water from being lost in the oil production pipeline, the first insulation component 6 drives the driving member 8 to work, and the driving member 8 drives the second insulation component 7 to work. The second insulation component 7 transfers heat to the oil outlet pipe 2 to maintain the temperature of the crude oil in the oil outlet pipe 2. At the same time, the driving member 8 also drives the sticky oil cleaning component 9 to work to process the sticky oil on the inner wall of the oil outlet pipe 2 to improve the quality of crude oil production.

[0023] As an optional embodiment, the first heat preservation component 6 includes: A heat preservation box 10, sleeved on the oil inlet pipe 1; A gas heater 11 is mounted on one side of the heat preservation box 10; The hollow spiral tube 12 is arranged inside the insulation box 10, and the hollow spiral tube 12 is wound on the oil inlet pipe 1. The input end of the hollow spiral tube 12 passes through the outside of the insulation box 10 and is fixedly connected to the air outlet of the gas heater 11. The output end of the hollow spiral tube 12 is connected to the input end, and the output end of the hollow spiral tube 12 is connected to an exhaust pipe 13. The exhaust pipe 13 is passed through the outside of the insulation box 10, and the diameter of the exhaust pipe 13 is smaller than the diameter of the hollow spiral tube 12.

[0024] For example, the hollow spiral tube 12 is made of a heat-conducting material, and the air inlet of the gas heater 11 is connected to an air pump. The air pump applies pneumatic force to the gas heater 11, so that the pneumatic force is heated by the gas heater 11 and then passes into the hollow spiral tube 12, heating the inside of the hollow spiral tube 12, thereby performing heat conduction heating on the oil inlet pipe 1. Since the diameter of the exhaust pipe 13 is smaller than the diameter of the hollow spiral tube 12, part of the pneumatic force is discharged from the exhaust pipe 13, and the other part re-enters the hollow spiral tube 12 for circulation. By arranging the hollow spiral tube 12 in the insulation box 10, the heat loss of the hollow spiral tube 12 can be avoided, thereby achieving the insulation effect.

[0025] As an optional embodiment, a water inlet pipe 14 is provided on one side of the thermal insulation box 10, and a water outlet pipe 15 is provided on the other side. The water inlet pipe 14 is connected to the seepage pipe 4, and the water outlet pipe 15 is connected to a portion of the oil inlet pipe 1 close to the oil outlet pipe 2.

[0026] For example, since it takes a certain amount of time to heat the hollow spiral tube 12, the heat preservation box 10 is connected to the seepage pipe 4 through the water inlet pipe 14, so that before the second control valve 5 is opened, hot water is passed into the heat preservation box 10 through the water inlet pipe 14, so as to preheat the hollow spiral tube 12 and improve the heating efficiency of the hollow spiral tube 12. The heat preservation box 10 is connected to the oil inlet pipe 1 through the water outlet pipe 15, so that after the first control valve 3 opens the oil inlet pipe 1, the hot water in the heat preservation box 10 can pass into the oil inlet pipe 1 and mix with the crude oil, thereby improving the utilization rate of hot water.

[0027] As an optional embodiment, a plurality of elastic balls 16 are provided inside the hollow spiral tube 12, a plurality of inclined springboards 17 are fixedly provided inside the half spiral portion of the hollow spiral tube 12 away from the input end, and a material retaining net 18 is provided at the bottom of the exhaust pipe 13, wherein the elastic balls 16 move in the hollow spiral tube 12 under the push of hot gas and are irregularly ejected under the action of the springboard 17 to generate heat by collision and friction in the hollow spiral tube 12.

[0028] For example, the hollow spiral tube 12 is divided into two areas by the input end and the output end, and each area occupies half of the hollow spiral tube 12. After the aerodynamic force is introduced into the hollow spiral tube 12, the temperature of the area close to the input end remains stable, and the temperature of the area close to the output end will decrease due to energy consumption. In order to maintain the temperature of the area at the output end, a springboard 17 is set in the output end area, and an elastic ball 16 is set in the hollow spiral tube 12. An aerodynamic force that can drive the elastic ball 16 to move along the inner wall of the hollow spiral tube 12 is applied to the hollow spiral tube 12. After passing through the output end area, the elastic ball 16 is affected by the distribution of the springboard 17, and undergoes irregular ejection, collision and friction in the output end area to generate heat. A material retaining net 18 is set at the bottom of the exhaust pipe 13 to prevent the elastic ball 16 from being discharged from the exhaust pipe 13 or stuck in the exhaust pipe 13.

[0029] As an optional embodiment, the elastic ball 16 includes: The sphere 19 has a plurality of mounting grooves formed on its surface; A plurality of protrusions 20 are respectively arranged in the mounting grooves, and one end of each of the protrusions 20 extends out of the surface of the sphere 19; A plurality of first springs 21 are respectively arranged inside the installation slot, and two ends of each first spring 21 respectively abut against the bottom of the installation slot and the protrusion 20 .

[0030] For example, the sphere 19 is moved by aerodynamic force, and after passing through the inclined springboard 17, it will fly along the springboard 17 and hit the inner wall of the hollow spiral tube 12. Through the action of the protrusion 20 and the first spring 21 on the sphere 19, the sphere 19 is ejected and moved according to the impact angle.

[0031] As an optional embodiment, the second heat preservation component 7 includes: A heat-conducting tube 22 is sleeved on the oil outlet pipe 2, and the heat-conducting tube 22 is fixedly connected to the oil outlet pipe 2; The heat preservation tube 23 is sleeved on the heat conduction tube 22, one end of the heat preservation tube 23 is rotatably connected to the oil outlet pipe 2, and the other end is transmission-connected to the driving member 8, and a heat preservation cavity is formed between the heat preservation tube 23 and the heat conduction tube 22; A plurality of friction rollers 24 are arranged in the heat preservation chamber, and each of the friction rollers 24 is attached to the outer wall of the heat-conducting cylinder 22; A plurality of support frames 25 are respectively arranged at a position of the friction roller 24 away from the heat-conducting tube 22, and the two ends of each of the support frames 25 are respectively rotatably connected to the two ends of the friction roller 24, and the two ends of each of the support frames 25 are slidably connected with a limiting slide 26, and one end of each of the limiting slide sleeves is fixedly connected to the inner wall of the heat-insulating tube 23, and a plurality of second springs 27 are fixedly provided on the side of each of the support frames 25 away from the friction roller 24, and one end of each of the second springs 27 is fixedly connected to the support frame 25, and the other end is against the inner wall of the heat-insulating tube 23.

[0032] For example, bearings are fixed at both ends of the insulation cylinder 23, and the inner ring of each bearing is fixedly connected to the oil outlet pipe 2. The insulation cylinder 23 is driven by the driving member 8 to rotate at a high speed, and the insulation cylinder 23 drives the limiting slide 26 to rotate, and the limiting slide 26 drives the support frame 25 to rotate, and the support frame 25 drives the friction roller 24 to rotate on the heat-conducting cylinder 22. A second spring 27 is provided to prevent the friction roller 24 from separating from the heat-conducting cylinder 22. The friction roller 24 rotates at a high speed on the heat-conducting cylinder 22, converts kinetic energy into thermal energy, and transmits it to the oil outlet pipe 2 through the heat-conducting cylinder 22, so as to heat the hot water and crude oil in the oil outlet pipe 2, and the rotation speed of the insulation cylinder 23 is controlled to achieve the insulation effect.

[0033] As an optional embodiment, a guide rod 28 is provided in the second spring 27, one end of the guide rod 28 is fixedly connected to the support frame 25, and the other end is passed through the outside of the insulation tube 23, and the length of the guide rod 28 passing through the insulation tube 23 is equal to the wall thickness of the heat-conducting tube 22.

[0034] For example, by providing the guide rod 28, on the one hand, it is used to limit the second spring 27, and on the other hand, according to the length of the guide rod 28 on the outer wall of the insulation tube 23, the structural condition in the insulation chamber is confirmed for easy maintenance or replacement.

[0035] As an optional embodiment, the driving member 8 includes: An impeller mechanism 29 is mounted beside the heat preservation tube 23, and an air inlet of the impeller mechanism 29 is connected to the exhaust pipe 13; A first gear 30, the center of which is fixedly connected to the shaft of the impeller mechanism 29; The second gear 31 is sleeved on the oil outlet pipe 2 , the second gear 31 is fixedly connected to one end of the heat preservation tube 23 , and the second gear 31 is meshed with the first gear.

[0036] For example, power is applied to the impeller mechanism 29 through the exhaust pipe to drive the first gear 30 to rotate, the first gear 30 drives the second gear 31 to rotate, and the second gear 31 drives the insulation tube 23 to rotate, so that the internal structure of the insulation tube 23 works to heat and insulate the oil outlet pipe 2.

[0037] As an optional embodiment, the sticky oil cleaning component 9 includes: A connecting pipe 32 is provided at the connection between the oil inlet pipe 1 and the oil outlet pipe 2, and the two ends of the connecting pipe 32 are respectively sleeved on the oil inlet pipe 1 and the oil outlet pipe 2, and the two ends of the connecting pipe 32 are respectively rotatably connected to the oil inlet pipe 1 and the oil outlet pipe 2, and the inner diameter of the connecting pipe 32 is the same as the inner diameter of the oil inlet pipe 1 and the oil outlet pipe 2; The oil scraper 33 is fixed on the inner wall of the connecting pipe 32, and the two ends of the oil scraper 33 extend to a certain length toward the oil inlet pipe 1 and the oil outlet pipe 2 respectively; A reducer 34 is mounted beside the connecting pipe 32, the input end of the reducer 34 is fixedly connected to the shaft of the impeller mechanism 29, and the output end of the reducer 34 is fixedly provided with a pulley 35; One end of the belt 36 is sleeved on the outer wall of the connecting pipe 32 , and the other end is sleeved on the pulley 35 .

[0038] For example, sealing gaskets are provided inside both ends of the connecting pipe 32, and a sealing bearing is provided on the side of each sealing gasket away from the inside of the connecting pipe 32. Each sealing bearing is respectively sleeved on the oil inlet pipe 1 and the oil outlet pipe 2, and the outer ring of each sealing bearing is fixedly connected to the inner wall of the connecting pipe 32, and the inner ring of each sealing bearing is respectively fixedly connected to the oil inlet pipe 1 and the oil outlet pipe 2. The reducer 34 is driven to work through the impeller mechanism 29, and the reducer drives the pulley 35 to rotate. The pulley 35 drives the connecting pipe 32 to rotate through the belt 36, and the connecting pipe 32 drives the oil scraper 33 to rotate, thereby cleaning the oil outlet pipe 2 and the oil inlet pipe 1 from sticky oil.

[0039] As an optional embodiment, a pressure gauge 37 and a thermometer 38 are provided on the second control valve 5 .

[0040] For example, the seepage pipe 4 is connected to a water pump, and the water pump is connected to a hot water tank. The water supply pressure of the seepage pipe 4 is monitored by a pressure gauge 37, and the thermometer 38 is used to monitor the water temperature in the seepage pipe 4, and the opening degree of the second control valve 5 is controlled according to the water supply pressure and water temperature to adjust the amount of hot water.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wellhead heat preservation pigging process device suitable for low temperature environment, comprising an oil inlet pipe (1) and an oil outlet pipe (2), one end of the oil inlet pipe (1) is connected with one end of the oil outlet pipe (2) to form an oil production pipeline, a first control valve (3) is installed on the oil inlet pipe (1), a portion of the control valve close to the oil outlet pipe (2) is provided with a seepage pipe (4) connected with the oil inlet pipe (1), and a second control valve (5) is installed on the seepage pipe (4), characterized in that: A first heat-insulating component (6) is installed between the first control valve (3) and the seepage pipe (4); a second heat-insulating component (7) is installed on the oil outlet pipe (2); a driving member (8) is mounted on the side of the oil outlet pipe (2); an input end of the driving member (8) is connected to the first heat-insulating component; an output end of the driving member (8) is transmission-connected to the second heat-insulating component (7); a sticky oil cleaning component (9) is provided at a location of the second heat-insulating component (7) close to the oil outlet pipe (2); the sticky oil cleaning component (9) is rotatably connected to the oil outlet pipe (2); and the sticky oil cleaning component (9) is transmission-connected to the driving member (8); The first thermal insulation component (6) is used to heat treat the crude oil that has just entered the oil production pipeline to reduce the viscosity of the crude oil. The driving component (8) is started through the first thermal insulation component (6) and drives the second thermal insulation component (7) to work, heat treating the oil outlet pipe (2) to maintain the temperature of the mixture of hot water and crude oil.

2. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 1, characterized in that: The first heat-insulating component (6) comprises: A heat preservation box (10) is sleeved on the oil inlet pipe (1); A gas heater (11) mounted on one side of the heat preservation box (10); A hollow spiral tube (12) is arranged inside the heat preservation box (10), the hollow spiral tube (12) is wound around the oil inlet pipe (1), the input end of the hollow spiral tube (12) passes through the outside of the heat preservation box (10) and is fixedly connected to the gas outlet of the gas heater (11), the output end of the hollow spiral tube (12) is connected to the input end, and an exhaust pipe (13) is connected to the output end of the hollow spiral tube (12), the exhaust pipe (13) passes through the outside of the heat preservation box (10), and the diameter of the exhaust pipe (13) is smaller than the diameter of the hollow spiral tube (12).

3. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 2, characterized in that: A water inlet pipe (14) is provided on one side of the heat preservation box (10), and a water outlet pipe (15) is provided on the other side. The water inlet pipe (14) is connected to the water seepage pipe (4), and the water outlet pipe (15) is connected to a portion of the oil inlet pipe (1) close to the oil outlet pipe (2).

4. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 2, characterized in that: A plurality of elastic balls (16) are arranged inside the hollow spiral tube (12), a plurality of inclined springboards (17) are fixedly arranged inside the half spiral portion of the hollow spiral tube (12) away from the input end, and a material blocking net (18) is arranged at the bottom of the exhaust pipe (13), wherein the elastic balls (16) move inside the hollow spiral tube (12) under the impetus of hot gas and are irregularly ejected under the action of the springboards (17), so as to collide and rub inside the hollow spiral tube (12) to generate heat.

5. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 4, characterized in that: The elastic ball (16) comprises: A sphere (19) having a plurality of mounting grooves formed on its surface; A plurality of protrusions (20) are respectively arranged in the mounting grooves, and one end of each of the protrusions (20) extends out of the surface of the sphere (19); A plurality of first springs (21) are respectively arranged inside the installation groove, and two ends of each first spring (21) respectively abut against the groove bottom and the protruding head (20) of the installation groove.

6. The wellhead heat preservation pigging process device suitable for low temperature environment according to claim 2, characterized in that: The second heat-insulating component (7) comprises: A heat-conducting tube (22) is sleeved on the oil outlet pipe (2), and the heat-conducting tube (22) is fixedly connected to the oil outlet pipe (2); a heat-insulating cylinder (23) sleeved on the heat-conducting cylinder (22), one end of the heat-insulating cylinder (23) being rotationally connected to the oil outlet pipe (2), and the other end of the heat-insulating cylinder (23) being transmission-connected to the driving member (8), and a heat-insulating cavity being formed between the heat-insulating cylinder (23) and the heat-conducting cylinder (22); A plurality of friction rollers (24) are arranged in the heat preservation chamber, and each of the friction rollers (24) is attached to the outer wall of the heat-conducting cylinder (22); A plurality of support frames (25) are respectively arranged at a location of the friction roller (24) away from the heat-conducting cylinder (22); two ends of each support frame (25) are rotatably connected to two ends of the friction roller (24); two ends of each support frame (25) are slidably connected to limit slideways (26); one end of each limit slide sleeve is fixedly connected to the inner wall of the heat-insulating cylinder (23); a plurality of second springs (27) are fixedly provided on one side of each support frame (25) away from the friction roller (24); one end of each second spring (27) is fixedly connected to the support frame (25), and the other end abuts against the inner wall of the heat-insulating cylinder (23).

7. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 6, characterized in that: A guide rod (28) is arranged inside the second spring (27), one end of the guide rod (28) is fixedly connected to the support frame (25), and the other end is passed through the outside of the heat insulation tube (23), and the length of the guide rod (28) passing through the heat insulation tube (23) is equal to the wall thickness of the heat conductive tube (22).

8. The wellhead heat preservation pigging process device suitable for low temperature environment according to claim 6, characterized in that: The driving member (8) comprises: An impeller mechanism (29) is mounted beside the heat preservation cylinder (23), and an air inlet of the impeller mechanism (29) is connected to the exhaust pipe (13); A first gear (30), the center of which is fixedly connected to the shaft of the impeller mechanism (29); The second gear (31) is sleeved on the oil outlet pipe (2), the second gear (31) is fixedly connected to one end of the heat preservation cylinder (23), and the second gear (31) is meshed with the first gear.

9. A wellhead heat preservation pigging process device suitable for low temperature environment according to claim 8, characterized in that: The sticky oil cleaning component (9) comprises: A connecting pipe (32) is arranged at the connection between the oil inlet pipe (1) and the oil outlet pipe (2), the two ends of the connecting pipe (32) are respectively sleeved on the oil inlet pipe (1) and the oil outlet pipe (2), the two ends of the connecting pipe (32) are respectively rotatably connected to the oil inlet pipe (1) and the oil outlet pipe (2), and the inner diameter of the connecting pipe (32) is the same as the inner diameter of the oil inlet pipe (1) and the oil outlet pipe (2); An oil scraper plate (33) is fixedly mounted on the inner wall of the connecting pipe (32), and two ends of the oil scraper plate (33) respectively extend to a certain length toward the oil inlet pipe (1) and the oil outlet pipe (2); A reducer (34) is mounted beside the connecting pipe (32), the input end of the reducer (34) is fixedly connected to the shaft of the impeller mechanism (29), and the output end of the reducer (34) is fixedly provided with a pulley (35); A belt (36) has one end sleeved on the outer wall of the connecting pipe (32) and the other end sleeved on the pulley (35).

10. The wellhead heat preservation pigging process device suitable for low temperature environment according to claim 1, characterized in that: The second control valve (5) is provided with a pressure gauge (37) and a thermometer (38).

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