Oil field well washing pry based on stagnation pressurization energy-saving pump and adjusting method of oil field well washing pry

Abstract

The invention discloses a well washing pry for an oil field based on a stagnation pressurizing energy-saving pump and an adjusting method of the well washing pry for the oil field. A liquid outlet pipeline; wherein the liquid inlet pipeline and the liquid outlet pipeline are connected through a conveying pump, an adjusting pipeline is arranged on a liquid outlet of the liquid outlet pipeline and comprises an adjusting pipe and an output pipe, one end of the adjusting pipe is detachably connected to the liquid outlet pipeline, and the other end of the adjusting pipe is connected with the output pipe through a plurality of connecting pipes; flexible pipes used for guiding liquid to flow are arranged in cavities of the output pipe and the connecting pipe, a plurality of pushing units used for extruding the side faces of the flexible pipes are arranged on the output pipe and the connecting pipe, and the pushing units are arranged around the central axis of the output pipe and the connecting pipe at equal angles. The operation burden of liquid conveying of the conveying pump can be reduced, the cleaning effect of output liquid on a shaft is guaranteed, and meanwhile assembling and adjusting operation are convenient.

Description

Technical Field

[0001] The invention relates to the field of oilfield well flushing, and in particular to an oilfield well flushing skid based on a stagnation boosting energy-saving pump and an adjustment method thereof. Background Art

[0002] Oilfield well-flushing skids are specialized equipment used for cleaning and maintaining oil wells. Over the long term, mud, sand, and impurities accumulate within the wellbore, leading to blockages and production losses. A well-flushing skid injects liquid into the well, using the impact of the liquid to disperse these impurities and remove them from the wellbore, restoring normal production. Crude oil contains wax, which can deposit on the inner walls of the tubing and cause blockages. A well-flushing skid can perform a hot flush, injecting hot water into the tubing to melt the wax and remove it from the wellbore, thus preventing wax buildup in the tubing.

[0003] The liquid delivery strength of the delivery pump on a conventional well-washing skid directly affects the flushing and cleaning effect of the liquid. Due to the deep depth of the oil well, the delivery pump's operational burden of liquid delivery is heavy, increasing the risk of failure. Furthermore, because the rigid pipeline on the well-washing skid only serves to transport liquid, if there is a certain distance between the well-washing skid placement and the oil well inlet device, the rigid pipeline needs to be extended horizontally for connection. This increases the time the liquid flows in the rigid pipeline, which to some extent affects the impact strength of the liquid when it enters the wellbore. Summary of the Invention

[0004] The object of the present invention is to provide an oilfield well-washing skid and an adjustment method thereof based on a stagnation booster energy-saving pump. The oilfield well-washing skid and the adjustment method thereof can reduce the operating burden of the delivery pump for conveying liquid, and ensure the cleaning effect of the output liquid on the wellbore, while facilitating assembly and adjustment operations.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] An oilfield well-washing skid based on a stagnation boosting energy-saving pump, comprising:

[0007] Liquid inlet pipeline;

[0008] Liquid outlet pipeline;

[0009] In which, the liquid inlet pipeline and the liquid outlet pipeline are connected by a delivery pump, and a regulating pipeline is provided on the liquid outlet of the liquid outlet pipeline, the regulating pipeline includes a regulating tube and an output tube, one end of the regulating tube is detachably connected to the liquid outlet pipeline and the other end thereof is connected to the output tube through a plurality of connecting tubes, flexible tubes for guiding the flow of liquid are provided in the cavities of the output tube and the connecting tube, and a plurality of pushing units for squeezing the side of the flexible tube are provided on the output tube and the connecting tube, and the pushing units are arranged at equal angles around their central axis, and a driving mechanism for driving the pushing units on the output tube and the connecting tube to synchronously squeeze the flexible tube is provided on the regulating tube, and transmission connection is achieved between adjacent output tubes and connecting tubes and the corresponding pushing units on adjacent connecting tubes, as well as between the driving mechanisms and pushing units on adjacent regulating tubes and connecting tubes, through a docking unit.

[0010] As a further improvement to the above technical solution, the pushing unit on the output pipe includes a push piece, the push piece has an arc-shaped cross-section, and a plurality of first hinged rods are provided on the push piece, one end of the first hinged rod is hinged to the push piece, and a torsion spring is provided between the two for applying a force to the first hinged rod to rotate the push piece, a second hinged rod corresponding to the first hinged rod is provided on the output pipe, one end of the second hinged rod is hinged to the output pipe, and a torsion spring is provided between the two for applying a force to the second hinged rod to rotate away from the push piece, the first hinged rod and the second hinged rod are both inclined relative to the central axis of the output pipe, the other end of the second hinged rod is hinged to the other end of the first hinged rod, and the opening of the angle formed between the two is opposite to the flow direction of the liquid in the output pipe, adjacent second hinged rods are connected by a first metal wire, and the first metal wire is in a straight state, the structure of the pushing unit on the connecting pipe is the same as that of the pushing unit on the output pipe, and the adjacent driving mechanisms and the second hinged rods, as well as the adjacent second hinged rods, are all connected by a docking unit to achieve transmission connection.

[0011] As a further improvement of the above technical solution, the docking unit includes a connector and a socket. The connector can be inserted into the socket and fixing holes for screw fixation are provided on the sides of both. The end faces of the connecting ends between the adjusting tube, the connecting tube and the output tube are provided with grooves corresponding to the pushing units one by one. The connector is slidably arranged in the grooves on one end of the connecting tube and the adjusting tube and a spring is provided between the two to apply a force to the connector to disengage from the groove. The plug-in end of the connector is exposed on the groove, and the socket is slidably arranged in the groove on the other end of the connecting tube and the output tube. Adjacent connectors and the second hinged rod, adjacent sockets and the second hinged rod, and the driving end of the driving mechanism and the connector are all connected by a second metal wire and the second metal wire is in a straight state.

[0012] As a further improvement of the above technical solution, the driving mechanism includes a rotating shaft and a driving seat. The rotating shaft is rotatably connected to the adjusting tube. The inner end of the rotating shaft is located in the cavity of the adjusting tube and is provided with a driving disk arranged up and down. The driving seat is located between the two driving disks and is provided with protrusions on the top and bottom ends of its inner end. A through hole for the protrusion to slide is opened on the driving disk. The through hole is arc-shaped and the distances from its two ends to the center position of the driving disk are different. A plurality of connecting blocks arranged at equal angles around the axis thereof are provided on the outer end of the driving seat. The connecting blocks are inserted and slidably connected to the adjusting tube. Each connecting block corresponds to the connector one by one and the two are connected by a second metal wire.

[0013] As a further improvement of the above technical solution, a through-hole for screws to pass through is provided on the side surfaces of the connecting pipe and the output pipe at a position opposite to the socket. The diameter of the through-hole is larger than the diameter of the fixing hole. When the connector is inserted into the socket, the fixing holes and the through-holes on both are in the same straight line.

[0014] As a further improvement of the above technical solution, both ends of the push pieces on the connecting pipe and the output pipe are bent outwards to form an arc surface structure.

[0015] As a further improvement of the above technical solution, flow meters are used on both the liquid inlet pipeline and the liquid outlet pipeline to measure the liquid flow rate therein.

[0016] The present invention also provides an adjustment method for an oilfield well-washing skid based on a stagnation boosting energy-saving pump according to any one of the above technical solutions, comprising the following steps:

[0017] Step 1: According to the depth of the oil well, select an appropriate number of connecting pipes and install them between the regulating pipe and the output pipe to form a regulating pipeline of a certain length;

[0018] Step 2: The driving mechanism drives the pushing units in the connecting tube and the output tube to synchronously squeeze the flexible tube therein along its radial direction, so that the side surface of the flexible tube is partially concave inward and the diameter of a certain length of the flexible tube is reduced.

[0019] As a further improvement of the above technical solution, in step one, when the regulating tube, the connecting tube and the output tube are connected in sequence and between adjacent connecting tubes, transmission connection is achieved between adjacent driving mechanisms and pushing units and between adjacent pushing units through a docking unit.

[0020] As a further improvement of the above technical solution, in step 2, the pushing units in the same connecting tube or output tube squeeze the flexible tube to the same depth.

[0021] Compared with the prior art, the present invention has the following advantages and effects:

[0022] (1) The present invention realizes that during the process of liquid output through the delivery pump, the flexible pipe diameter is changed to form a channel that can accelerate the liquid, thereby accelerating the flow rate of the liquid, enhancing the impact force of the liquid output, improving the flushing effect of the liquid on the wellbore and ensuring the heat exchange effect between the liquid and the wellbore. Therefore, under the condition of the same liquid output state, the operating burden of the delivery pump for delivering the liquid can be reduced, and the effect of hot washing operation on the oil well can be guaranteed.

[0023] (2) The present invention adopts a combined structural arrangement of the regulating pipeline, so that the length of the regulating pipeline can be adjusted according to the depth of the oil well, thereby ensuring the cleaning effect of the output liquid on the wellbore. Combined with the coordinated arrangement of the driving mechanism, the pushing unit and the docking unit in the regulating pipeline, the transmission connection between adjacent driving mechanisms and pushing units and between adjacent pushing units in the regulating pipeline can be completed while the regulating pipeline is being assembled, thereby achieving the effect of the driving mechanism controlling all pushing units in the regulating pipeline, thereby improving the convenience of assembly and adjustment operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of an oil field well washing skid based on a stagnation boosting energy-saving pump.

[0025] Figure 2 yes Figure 1 The structural diagram of the expansion state of the regulating pipeline is shown in FIG.

[0026] Figure 3 yes Figure 1 The structural diagram of the regulating tube is shown in .

[0027] Figure 4 yes Figure 1 The structural diagram of the output tube is shown in .

[0028] Figure 5 yes Figure 2 The structural diagram of the connecting pipe from perspective one is shown in FIG.

[0029] Figure 6 yes Figure 2 The structural diagram of the connecting pipe from perspective 2 is shown in FIG.

[0030] Figure 7 yes Figure 6 Schematic diagram of the structure of the connecting pipe cross section shown in .

[0031] Figure 8 yes Figure 6 Schematic diagram of the local structure of the longitudinal section of the connecting pipe shown in .

[0032] Figure 9 yes Figure 3 Schematic diagram of the partial structure of the longitudinal section of the regulating tube shown in .

[0033] Among them, the liquid inlet pipeline 1, the liquid outlet pipeline 2, the delivery pump 3, the regulating pipeline 4, the regulating tube 41, the output tube 42, the connecting tube 43, the flexible tube 5, the pushing unit 6, the push piece 61, the first hinge rod 62, the second hinge rod 63, the first metal wire 64, the accommodating groove 65, the arc surface structure 66, the driving mechanism 7, the rotating shaft 71, the driving seat 72, the driving disk 73, the protrusion 74, the through hole 75, the connecting block 76, the hand wheel 77, the perforation 78, the docking unit 8, the plug-in component 81, the socket component 82, the fixing hole 83, the groove 84, the second metal wire 85, the roller 86, and the flow meter 9. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0035] See also Figures 1-9 In this embodiment, a well-washing skid for oil fields based on a stagnation booster energy-saving pump includes a liquid inlet pipeline 1 and a liquid outlet pipeline 2. The liquid inlet pipeline 1 and the liquid outlet pipeline 2 are connected by a delivery pump 3. A regulating pipeline 4 is provided on the liquid outlet of the liquid outlet pipeline 2. The regulating pipeline 4 includes a regulating pipe 41 and an output pipe 42. One end of the regulating pipe 41 is detachably connected to the liquid outlet pipeline 2 and the other end thereof is connected to the output pipe 42 through a plurality of connecting pipes 43. A flexible pipe 5 for guiding the flow of liquid is provided in the cavities of the output pipe 42 and the connecting pipe 43. The tube 42 and the connecting tube 43 are both provided with a plurality of pushing units 6 for squeezing the side of the flexible tube 5, and each pushing unit 6 is arranged at equal angles around its axis. The adjusting tube 41 is provided with a driving mechanism 7 for driving the pushing units 6 on the output tube 42 and the connecting tube 43 to synchronously squeeze the flexible tube 5. The corresponding pushing units 6 on adjacent output tubes 42 and connecting tubes 43 and on adjacent connecting tubes 43, as well as the driving mechanisms 7 and pushing units 6 on adjacent adjusting tubes 41 and connecting tubes 43 are all connected by a docking unit 8 to achieve transmission connection.

[0036] Before use, the liquid inlet pipeline 1 connected to the delivery pump 3 is connected to the liquid storage tank, and then a regulating pipeline 4 is set on the liquid outlet pipeline 2 (that is, according to the depth of the oil well, an appropriate number of connecting pipes 43 are selected and installed between the regulating pipe 41 and the output pipe 42 to form a regulating pipe 4 of a certain length), so that the liquid outlet pipeline 2 is connected to the inlet device of the oil well via the regulating pipe 4, and then the driving mechanism 7 drives the pushing units 6 in the connecting pipe 43 and the output pipe 42 to synchronously squeeze the flexible tube 5 therein along its radial direction, so that the side surface of the flexible tube 5 is partially concave inward and the diameter of the flexible tube 5 is reduced over a certain length, thereby achieving the purpose of forming a pipeline on the regulating pipe 4 that can increase the liquid flow rate, thereby improving the flushing intensity of the liquid and ensuring that the liquid output from the pipeline enters the wellbore for flushing and cleaning. At the same time, the accelerated liquid flow rate can also enhance the heat exchange process between the liquid and the wellbore, thereby improving the effect of the hot washing operation on the wellbore.

[0037] During the above process, when the adjusting tube 41, the connecting tube 43 and the output tube 42 are connected in sequence and between adjacent connecting tubes 43, adjacent driving mechanisms 7 and pushing units 6 and adjacent pushing units 6 are all connected to each other through the docking unit 8, and when the caliber of the flexible tube 5 is adjusted, the pushing units 6 in the same connecting tube 43 or output tube 42 have the same extrusion depth on the flexible tube 5.

[0038] In this embodiment, the delivery pump 3 is a stagnation boosting energy-saving pump.

[0039] See also Figure 1 The flow rate of the liquid in the liquid inlet pipeline 1 and the liquid outlet pipeline 2 is measured by a flow meter 9, which improves the convenience of controlling the liquid delivery volume in the pipeline.

[0040] See also Figure 4-Figure 8The pushing unit 6 on the output tube 42 includes a push piece 61, the cross section of the push piece 61 is arc-shaped, and a plurality of first hinged rods 62 are provided on the push piece 61. One end of the first hinged rod 62 is hinged to the push piece 61 and a torsion spring is provided between the two for applying a force to the first hinged rod 62 to rotate the push piece 61. The output tube 42 is provided with a second hinged rod 63 corresponding to the first hinged rod 62. One end of the second hinged rod 63 is hinged to the output tube 42 and a torsion spring is provided between the two for applying a force to the second hinged rod 63 to rotate back to the push piece 61. The first hinged rod 62 and the second hinged rod 63 are connected to each other. 3 are arranged obliquely relative to the central axis of the output pipe 42. The other end of the second hinged rod 63 is hinged to the other end of the first hinged rod 62, and the opening of the angle formed between the two is oriented opposite to the flow direction of the liquid in the output pipe 42. Adjacent second hinged rods 63 are connected by first metal wires 64, and the first metal wires 64 are in a stretched state. The structure of the pushing unit 6 on the connecting pipe 43 is the same as that of the pushing unit 6 on the output pipe 42. Adjacent driving mechanisms 7 and second hinged rods 63, as well as adjacent second hinged rods 63, are all connected to each other through docking units 8.

[0041] When the driving mechanism 7 is driven, the driving mechanism 7 can drive the second hinged rod 63 to rotate inward, so that the angled state between the first hinged rod 62 and the second hinged rod 63 changes to a straight state, thereby pushing the push piece 61 to squeeze the side of the flexible tube 5, so that a depression is formed on the side of the flexible tube 5, thereby achieving the effect of reducing the diameter of a certain length on the flexible tube 5, and thereby achieving the purpose of forming a section of pipeline that can increase the liquid flow rate at intervals on the regulating pipeline 4, thereby increasing the flushing intensity of the liquid.

[0042] In this embodiment, a receiving groove 65 for accommodating the pushing unit 6 is provided on the side of the cavity of the connecting tube 43 and the output tube 42. When the diameter of the flexible tube 5 is not adjusted, the consistency of the diameter of the flexible tube 5 is ensured, the influence of the change of the diameter of the pipeline on the flow rate of the liquid therein is reduced, and the stability of the liquid flow in the pipeline is ensured.

[0043] See also Figure 7 Both ends of the push piece 61 on the connecting tube 43 and the output tube 42 are bent outward to form an arc surface structure 66. When the push piece 61 squeezes the flexible tube 5, the risk of damage to the flexible tube 5 caused by hard squeezing between the two ends of the push piece 61 and the flexible tube 5 is reduced, thereby ensuring the normal liquid transportation effect of the pipeline.

[0044] See also Figure 3-Figure 7The docking unit includes a plug-in connector 81 and a socket-shaped connector 82. The plug-in connector 81 can be inserted into the socket-shaped connector 82 and both sides are provided with fixing holes 83 for screw fixing. The end surfaces of the connecting ends between the adjusting tube 41, the connecting tube 43 and the output tube 42 are provided with grooves 84 corresponding to the pushing unit 6 one by one. The plug-in connector 81 is slidably arranged in one end of the connecting tube 43 and the groove 84 on the adjusting tube 41, and a spring is provided between the two for applying a force to the plug-in connector 81 to disengage from the groove 84. The plug-in end of the plug-in connector 81 is exposed on the groove 84, and the socket-shaped connector 82 is slidably arranged in the other end of the connecting tube 43 and the groove 84 on the output tube 42. The adjacent plug-in connectors 81 and the second hinge rod 63, the adjacent socket-shaped connectors 82 and the second hinge rod 63, and the driving end of the driving mechanism 7 and the plug-in connector 81 are all connected by a second metal wire 85, and the second metal wire 85 is in a straight state.

[0045] When the regulating tube 41, the connecting tube 43 and the output tube 42 are connected in sequence and between adjacent connecting tubes 43, the plug-in connector 81 and the socket connector 82 between the two can be plugged in and fixed with screws, thereby completing the transmission connection between adjacent driving mechanisms 7 and pushing units 6 and between adjacent pushing units 6, so that when the driving mechanism 7 is driven, the effect of each pushing unit 6 synchronously squeezing the flexible tube 5 can be achieved through the docking unit 8.

[0046] See also Figure 3 、 Figure 9 The driving mechanism 7 includes a rotating shaft 71 and a driving seat 72. The rotating shaft 71 is rotatably connected to the adjusting tube 41. The inner end of the rotating shaft 71 is located in the cavity of the adjusting tube 41 and is provided with a driving disk 73 arranged up and down. The driving seat 72 is located between the two driving disks 73 and is provided with a protrusion 74 on the top and bottom ends of its inner end. A through hole 75 is opened on the driving disk 73 for the sliding of the protrusion 74. The through hole 75 is arc-shaped and the distances from its two ends to the center position of the driving disk 73 are different. The outer end of the driving seat 72 is provided with a plurality of connecting blocks 76 arranged at equal angles around its axis. The connecting blocks 76 are inserted and slidably connected to the adjusting tube 41. Each connecting block 76 corresponds to the connector 81 one by one and the two are connected by a second metal wire 85.

[0047] When the rotating shaft 71 rotates relative to the adjustment tube 41, the rotating shaft 71 can drive the two driving plates 73 to rotate, thereby driving the driving seat 72 to slide relative to the adjustment tube 41 through the cooperation between the through hole 75 and the protrusion 74. This allows the driving seat 72 to drive the pushing units 6 to synchronously squeeze the flexible tube 5 through the docking unit, thereby adjusting the upper diameter of the flexible tube 5. At the same time, when the rotating shaft 71 rotates and resets, the spring can provide a reset force for the plug-in component 81, and the torsion spring can provide a reset force for the first hinge rod 62 and the second hinge rod 63, thereby driving the socket 82 to reset. This ensures that the adjustment pipeline 4 can be properly disassembled while ensuring that it can be adjusted and used normally in the future.

[0048] In order to facilitate manual rotation of the rotating shaft 71 , a hand wheel 77 is provided on the outer end of the rotating shaft 71 .

[0049] In this embodiment, the regulating tube 41 , the output tube 42 and the connecting tube 43 are all provided with rollers 86 for adjusting the movement direction of the second metal wire 85 .

[0050] See also Figure 5 、 Figure 7 On the side surfaces of the connecting pipe 43 and the output pipe 42, a through-hole 78 is provided at a position opposite to the socket 82 for passing a screw. The diameter of the through-hole 78 is larger than the diameter of the fixing hole 83. When the connector 81 is inserted into the socket 82, the fixing holes 83 and the through-hole 78 on the two are in the same straight line. After the adjusting pipe 41, the connecting pipe 43 and the output pipe 42 are connected in sequence, and between adjacent connecting pipes 43, the socket 82 and the connector 81 on the two can be fixed with screws, thereby improving the convenience of the connection operation.

[0051] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described embodiments, without departing from the contents of this specification or exceeding the scope defined by the claims, and such modifications, additions, or substitutions may be made to the described embodiments. Such modifications, additions, or substitutions may be made by persons skilled in the art. Such modifications, additions, or substitutions may be made to the described embodiments without departing from the contents of this specification or exceeding the scope defined by the claims, and such modifications shall fall within the scope of protection of the present invention.

Claims

1. An oilfield well-washing skid based on a stagnation booster energy-saving pump, characterized in that: include: Liquid inlet pipeline; Liquid outlet pipeline; In which, the liquid inlet pipeline and the liquid outlet pipeline are connected by a delivery pump, and a regulating pipeline is provided on the liquid outlet of the liquid outlet pipeline, the regulating pipeline includes a regulating tube and an output tube, one end of the regulating tube is detachably connected to the liquid outlet pipeline and the other end thereof is connected to the output tube through a plurality of connecting tubes, flexible tubes for guiding the flow of liquid are provided in the cavities of the output tube and the connecting tube, and a plurality of pushing units for squeezing the side of the flexible tube are provided on the output tube and the connecting tube, and the pushing units are arranged at equal angles around their central axis, and a driving mechanism for driving the pushing units on the output tube and the connecting tube to synchronously squeeze the flexible tube is provided on the regulating tube, and transmission connection is achieved between adjacent output tubes and connecting tubes and the corresponding pushing units on adjacent connecting tubes, as well as between the driving mechanisms and pushing units on adjacent regulating tubes and connecting tubes, through a docking unit.

2. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 1 is characterized in that: The pushing unit on the output pipe includes a push piece, the cross-section of the push piece is arc-shaped, and the push piece is provided with a plurality of first hinge rods, one end of the first hinge rod is hinged to the push piece and a torsion spring is provided between the two for applying a force to the first hinge rod to rotate the push piece, a second hinge rod is provided on the output pipe corresponding to the first hinge rod, one end of the second hinge rod is hinged to the output pipe and a torsion spring is provided between the two for applying a force to the second hinge rod to rotate away from the push piece, the first hinge rod and the second hinge rod are both inclined relative to the central axis of the output pipe, the other end of the second hinge rod is hinged to the other end of the first hinge rod, and the opening of the angle formed between the two is opposite to the flow direction of the liquid in the output pipe, adjacent second hinge rods are connected by a first metal wire, and the first metal wire is in a straight state, the structure of the pushing unit on the connecting pipe is the same as that of the pushing unit on the output pipe, and the adjacent driving mechanism and the second hinge rods and the adjacent second hinge rods are all connected by a docking unit to achieve transmission connection.

3. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 2 is characterized in that: The docking unit includes a plug-in connector and a socket connector. The plug-in connector can be inserted into the socket connector and fixing holes for screw fixation are provided on the sides of both connectors. The end faces of the connecting ends between the adjusting tube, the connecting tube and the output tube are provided with grooves corresponding to the pushing units one by one. The plug-in connector is slidably arranged in the grooves on one end of the connecting tube and the adjusting tube and a spring is provided between the two to apply a force to the plug-in connector to disengage from the groove. The plug-in end of the plug-in connector is exposed on the groove and the socket connector is slidably arranged in the groove on the other end of the connecting tube and the output tube. Adjacent plug-ins and the second hinged rod, adjacent sockets and the second hinged rod, and the driving end of the driving mechanism and the plug-in connector are connected by a second metal wire and the second metal wire is in a straight state.

4. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 3 is characterized in that: The driving mechanism includes a rotating shaft and a driving seat. The rotating shaft is rotatably connected to the adjusting tube. The inner end of the rotating shaft is located in the cavity of the adjusting tube and is provided with a driving disk arranged up and down. The driving seat is located between the two driving disks and is provided with protrusions on the top and bottom ends of its inner end. A through hole for the sliding of the protrusion is opened on the driving disk. The through hole is arc-shaped and the distances from its two ends to the center position of the driving disk are different. A plurality of connecting blocks arranged at equal angles around the axis thereof are provided on the outer end of the driving seat. The connecting blocks are inserted and slidably connected to the adjusting tube. Each connecting block corresponds to the connector one by one and the two are connected by a second metal wire.

5. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 4 is characterized in that: The sides of the connecting pipe and the output pipe are provided with through holes for screws to pass through at positions opposite to the socket. The diameter of the through holes is larger than the diameter of the fixing holes. When the connector is inserted into the socket, the fixing holes and the through holes on both are in the same straight line.

6. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 2 is characterized in that: Both ends of the push pieces on the connecting pipe and the output pipe are bent outwards to form an arc surface structure.

7. The oilfield well-washing skid based on the stagnation boosting energy-saving pump according to claim 1 is characterized in that: The flow rates of the liquids in the liquid inlet and outlet pipelines are measured by flow meters.

8. An adjustment method for an oilfield well-washing skid based on a stagnation boosting energy-saving pump according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: According to the depth of the oil well, select an appropriate number of connecting pipes and install them between the regulating pipe and the output pipe to form a regulating pipeline of a certain length; Step 2: The driving mechanism drives the pushing units in the connecting tube and the output tube to synchronously squeeze the flexible tube therein along its radial direction, so that the side surface of the flexible tube is partially concave inward and the diameter of a certain length of the flexible tube is reduced.

9. The adjustment method for the oilfield well flushing skid according to claim 8, characterized in that: In the step 1, when the regulating tube, the connecting tube and the output tube are connected in sequence and between adjacent connecting tubes, adjacent driving mechanisms and pushing units and adjacent pushing units are all connected to each other through the docking unit.

10. The adjustment method for the oilfield well flushing skid according to claim 8, characterized in that: In the second step, each pushing unit in the same connecting pipe or output pipe squeezes the flexible pipe to the same depth.

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