CN115726740A - Long-plunger anti-corrosion oil well pump - Google Patents

Abstract

The invention relates to a long-plunger oil well pump technology, which is used for solving the problems that an oil well pump is empty and pumped due to the accumulation of gas in crude oil in a well, the normal operation of a pump cylinder is blocked by dirt in the oil well pump and the normal operation of the oil well pump is influenced by the accumulation of sand and stones in the oil well pump, in particular to a long-plunger anti-corrosion oil well pump which comprises a pump cylinder, a plunger, an outer pipe, a blind plug and an oil inlet pipe; the first stirring blade and the second stirring blade stir and mix underground crude oil through the rotation of the reciprocating lead screw, so that the situation that bubbles generated by gas accumulation in the crude oil move to the position of an oil well pump to cause empty pumping operation of the oil well pump is avoided, the first scale scraping ring and the second scale scraping ring are driven to remove scale on the inner wall of the outer pipe, the inner wall and the outer wall of the pump cylinder and the outer wall of the plunger in the process of rotating the reciprocating lead screw, the oil well pump can normally operate, the second rotating disc is driven to rotate in the rotating process of the connecting shaft to enable the filter screen frame to slide on the inner side of the slideway, and sand and stones in the crude oil entering the oil well pump are filtered and pushed out to the outer side of the oil well pump.

Description

Long-plunger anti-corrosion oil well pump

Technical Field

The invention relates to the technology of long-plunger oil-well pumps, in particular to a long-plunger anti-corrosion oil-well pump.

Background

The oil well pump is a common underground device driven by an oil pumping unit to pump crude oil in a well to the ground, and the common oil well pump mainly comprises a pump cylinder, a suction valve, a piston and a discharge valve. According to the underground fixing mode of the oil well pump, the oil well pump can be divided into a tubular pump and a rod pump; in the prior art, when the oil well pump extracts crude oil underground, because the crude oil is often accompanied by gas such as gas, carbon dioxide and the like, the crude oil in the gas is gathered into a bubble, when the oil well pump extracts the bubble position of the crude oil, the crude oil is difficult to extract, the gas enters the oil well pump along the oil inlet pipe, the space for extracting the crude oil in the oil well pump is occupied, the crude oil amount extracted each time before the gas is discharged in the oil well pump is reduced, the time required for extracting the same amount of crude oil is prolonged, and the efficiency for extracting the crude oil by the oil well pump is reduced; in the process of extracting crude oil for a long time, the oil well pump needs to reinject sewage in the operation process of extracting the crude oil, so that impurities in the crude oil and stains in the sewage are adhered to the inner wall of the oil well pump, the inner space of the oil well pump is reduced due to the increase of the amount of the dirt, the movable space of a pump cylinder is reduced, and the oil well pump is difficult to continue oil pumping operation after the pump cylinder is blocked and cannot move; the sand and stone contained in the pumped underground crude oil is more, the sand and stone entering along with the crude oil cannot enter the movable position of the pump barrel under the obstruction of the sand control structure, the sand and stone entering the oil well pump are deposited at the blind plugging position at the bottom of the oil well pump under the action of gravity, the space size at the bottom of the oil well pump is fixed, and in the long-time working process of the oil well pump, the accumulated sand and stone easily blocks the position of the sand control structure along with the increase of the accumulated sand and stone at the bottom of the oil well pump, so that the oil pumping speed caused by the oil well pump is influenced; in view of the above technical problem, the present application proposes a solution.

Disclosure of Invention

The invention aims to enable a first stirring blade and a second stirring blade to stir and mix underground crude oil through the rotation of a reciprocating lead screw, prevent bubbles generated by gas accumulation in the crude oil from moving to the position of an oil well pump to cause idle extraction operation of the oil well pump, drive a first scale scraping ring and a second scale scraping ring to remove scales on the inner wall of an outer pipe, the inner wall and the outer wall of a pump cylinder and the outer wall of a plunger piston in a process of rotating the reciprocating lead screw, enable the oil well pump to normally operate, drive a second rotary disc to rotate in a process of rotating a connecting shaft to enable a filter screen frame to slide on the inner side of a slideway, filter sand in the crude oil entering the oil well pump and push the sand out of the oil well pump to the outer side of the oil well pump, solve the problem that the oil well pump generates idle extraction due to the accumulation of the gas in the underground crude oil, the internal scales block the normal operation of the pump cylinder and the accumulation of the sand in the oil well pump affects the normal operation, and provide the long-plunger oil well pump.

The purpose of the invention can be realized by the following technical scheme: a long-plunger anti-corrosion oil well pump comprises a pump cylinder, a plunger, an outer pipe, a blind plug and an oil inlet pipe, wherein the pump cylinder is connected above the inner side wall of the outer pipe in a sliding manner, the plunger is connected below the inner side wall of the outer pipe through the oil inlet pipe, the blind plug is connected to the lower end of the outer pipe, and an exhaust mechanism is arranged in the middle of the lower surface of the blind plug;

exhaust mechanism includes first transmission case, first transmission case upper surface one side integrated into one piece has the second transmission case, blind stifled inside upper surface corresponds the pump barrel with outer tube intermediate position department rotates and is connected with reciprocal lead screw, the pump barrel lateral wall corresponds reciprocal lead screw position department is connected with the sliding block, reciprocal lead screw is close to the lower extreme in the blind stifled outside is connected with first runner, blind stifled lower surface intermediate position department rotates through the connecting axle and is connected with first stirring leaf, the connecting axle lateral wall is close to first stirring leaf top is connected with the second runner, first runner with the second runner passes through the transmission belt transmission and is connected, the inside lower surface of first transmission case is close to second transmission case position department rotates through the pivot and is connected with the third runner, the inside upper surface of second transmission case is close to third runner position department rotates through the pivot and is connected with the second gear, second gear connection is connected with the third gear with pivot lateral wall top, second transmission inside wall below rotates through the pivot and is connected with the fourth gear, one side of fourth gear connection is connected with the fourth runner with the pivot, second transmission case top is connected with the fifth transmission case lateral wall, the second side of pivot is connected with the second runner lateral wall outside.

As a preferred embodiment of the invention, the inner side wall of the outer pipe is provided with a scale scraping mechanism; the scale scraping mechanism comprises a transmission runner, three reciprocating screws are sleeved on the inner side of the transmission runner on the outer side wall of each reciprocating screw through a transmission belt to be in transmission connection, the outer side wall of each reciprocating screw is connected with a first scale scraping ring in a sliding mode, the inner side of each pump cylinder is connected with a second scale scraping ring at a position close to the middle of the pump cylinder and the plunger, the lower surface of the inner part of the pump cylinder is connected with a limiting spring at a position corresponding to the second scale scraping ring, and one side of the upper surface of the second scale scraping ring is connected with a traction rope; the first scale scraping ring comprises an outer scraper, and the inner side wall of the outer scraper is connected with a fixed inner scraper through a connecting block; the second is scraped dirty and is encircled including the elastic box, elastic box lateral wall one side integrated into one piece has outer scraper blade, elastic box lateral wall opposite side has the activity interior scraper blade through connecting piece sliding connection, the inside corresponding connecting piece position department of elastic box is connected with expanding spring.

As a preferred embodiment of the invention, the lower surface inside the plunger is provided with a sand filtering mechanism; the sand filtering mechanism comprises a first rotary disc, a sealing ring is connected to the outer side wall of the first rotary disc, a plurality of uniformly distributed telescopic rods are connected to the outer side of the upper surface of the first rotary disc, a second rotary disc is arranged at the upper end of each telescopic rod, a limiting ring is integrally formed on the outer side wall of the second rotary disc, a traction rod is connected to one side of the upper surface of the second rotary disc through a rotating shaft in a rotating mode, one end of the traction rod is connected with an adjusting rod through a rotating shaft in a rotating mode, a slide way is formed in the upper surface and the lower surface of the inner portion of an oil inlet pipe, and a filter screen frame is connected to the inner side wall of the slide way in a sliding mode.

In a preferred embodiment of the present invention, a first gear is connected to a position corresponding to the second gear above an outer side wall of the third rotating wheel connecting rotating shaft, the size of external teeth of the first gear is the same as the size of external teeth of the second gear, and flexible hoses are connected to upper and lower surfaces of the sliding block at positions corresponding to the reciprocating screw.

As a preferred embodiment of the present invention, a sliding hole is formed in an upper surface of the connecting block at a position corresponding to the reciprocating lead screw, an inner diameter of the sliding hole is the same as an outer diameter of the reciprocating lead screw, a hole having the same size as the outer diameter of the traction rope is formed in a position corresponding to the outer side wall of the pump cylinder, a sliding member is connected to an inner side wall of the sliding hole, a sealing gasket is connected to a position corresponding to the connecting member on an inner side wall of the elastic box, and circulation holes are formed in positions between upper surfaces of the first scale scraping ring and the second scale scraping ring.

As a preferred embodiment of the present invention, the lower surface of the second turntable is rotatably connected to a rotating sleeve at a position corresponding to the position of the telescopic rod, a position-limiting chute is formed in the inner side wall of the sealing ring at a position corresponding to the position of the limiting ring, a chute is formed in the inner side wall of the chute at a position corresponding to the position of the filter screen frame, and sliding position-limiting strips are connected to two sides of the outer side wall of the filter screen frame at positions corresponding to the chutes.

As a preferred embodiment of the invention, the use method of the long-plunger anti-corrosion oil well pump comprises the following steps: the method comprises the following steps: after the oil well pump is placed underground, the pump cylinder can be pushed up and down in a reciprocating manner through the pull rod, so that the pump cylinder can interact with the plunger piston inside the outer pipe, underground crude oil enters the plunger piston through the position of the oil inlet pipe, overflows to the inner side of the pump cylinder from the upper part of the plunger piston under the action of pressure difference, then overflows to the inner side of the outer pipe from the upper part of the pump cylinder, and then is transmitted to a specified place from a corresponding pipeline for crude oil treatment; step two: in the process of up-and-down reciprocating motion of the pump barrel in the outer tube, the sliding block drives the reciprocating lead screw to rotate when the sliding block is in up-and-down reciprocating motion through the interaction between the sliding block connected to the outer side wall of the pump barrel and the reciprocating lead screw, the first rotating wheel connected to one end of the reciprocating lead screw is in transmission with the second rotating wheel through a transmission belt, the reciprocating lead screw drives the connecting shaft connected with the second rotating wheel to rotate, the first stirring blade on the outer side wall of the connecting shaft stirs and mixes underground crude oil, the connecting shaft is in transmission with the third rotating wheel through another second rotating wheel connected to the outer side wall of the connecting shaft, the first gear on the outer side wall of the rotating shaft of the third rotating wheel is perpendicular to and embedded with the second gear, the connecting shaft is sleeved on the second rotating wheel and the third rotating wheel through the transmission belt to drive the second gear to rotate, the third gear on the same shaft is perpendicular to and embedded with the fourth gear, the fourth rotating wheel on the same shaft is in transmission with the fifth rotating through the transmission belt, the third gear drives the supporting shaft to rotate, and the second stirring blade on the outer side wall of the supporting shaft to stir crude oil entering the position of the crude oil inlet pipe; step three: the first scale scraping ring connected to the outer side wall of the reciprocating screw rod through the connecting block can do up-and-down reciprocating motion on the outer side wall of the reciprocating screw rod in the process that the reciprocating screw rod rotates, so that the outer scraper and the fixed inner scraper on two sides of the first scale scraping ring can respectively clean dirt on the inner side wall of the outer pipe and the outer side wall of the pump cylinder, the first scale scraping ring penetrates through a hole in the outer side wall of the pump cylinder through a traction rope in the up-and-down moving process to be connected with the second scale scraping ring, the first scale scraping ring is dragged in the moving process, the second scale scraping ring is dragged in the upward moving process of the inner side of the pump cylinder through a traction rope, a limiting spring connected to the lower surface of the second scale scraping ring is stretched and lengthened, the second scale scraping ring does up-and-down reciprocating motion on the inner side of the pump cylinder under the traction of the first scale scraping ring, and the outer scraper and the movable inner scraper on the second scale scraping ring respectively clean dirt on the inner side wall of the pump cylinder and the outer side wall of the plunger; step four: in the rotation process of the connecting shaft, the first rotary disc rotates along with the connecting shaft, so that the second rotary disc connected through the telescopic rod synchronously rotates, the limiting ring integrally formed with the second rotary disc slides inside the limiting chute on the inner side wall of the sealing ring, and the traction rod connected to the upper surface of the second rotary disc through the rotating shaft in the rotation process of the second rotary disc pulls the filter screen frame to slide on the inner side of the slide way through the traction adjusting rod.

Compared with the prior art, the invention has the beneficial effects that: 1. the reciprocating screw rod is driven to rotate in the up-and-down moving process of the pump barrel, so that the first stirring blade and the second stirring blade can stir and mix underground crude oil, and the phenomenon that bubbles generated by gas aggregation in the crude oil move to the oil well pump position to cause idle pumping operation of the oil well pump and influence the oil pumping efficiency of the oil well pump is avoided; 2. the reciprocating screw rod drives the first descaling ring to descale the inner wall of the outer pipe and the outer wall of the pump barrel in the rotating process, and the traction rope drives the second descaling ring to descale the inner wall of the pump barrel and the outer wall of the plunger in the moving process of the first descaling ring, so that the normal operation of the oil well pump cannot be influenced by accumulation of dirt in the oil well pump; 3. the first rotary disc is driven to rotate in the rotation process of the connecting shaft, the second rotary disc is supported to keep the same inclination angle with the slide way to rotate in the rotation process of the first rotary disc, the filter screen frame is driven to slide on the inner side of the slide way through the traction rod in the rotation process of the second rotary disc, sand in crude oil entering the oil well pump is filtered and pushed out to the outer side of the oil well pump, the sand outside the discharge is far away from the position of the oil inlet pipe under the action of centrifugal force of the rotation of the second stirring blade, and the sand cannot enter the position of the oil inlet pipe again to cause adverse effects on the filtering operation of the filter screen frame.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a main body structure view of the present invention;

FIG. 2 is a structural view of an exhaust mechanism of the present invention;

FIG. 3 is a rear view of the present invention shown in FIG. 2;

FIG. 4 is an enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of the portion B of FIG. 3 according to the present invention;

FIG. 6 is a structural view of a scale scraping mechanism of the present invention;

FIG. 7 is a structural view of the drive pulley of the present invention;

FIG. 8 is a view showing the construction of a first scraper ring according to the present invention;

FIG. 9 is a structural view of a second scraper ring of the present invention;

FIG. 10 is an enlarged view of the portion C of FIG. 9 according to the present invention;

FIG. 11 is a structural view of a sand filtering mechanism of the present invention;

FIG. 12 is a schematic view of the slide of the present invention;

fig. 13 is an enlarged view of the portion D of fig. 12 according to the present invention.

In the figure: 1. a pump barrel; 2. a plunger; 3. an outer tube; 4. blind plugging; 5. an exhaust mechanism; 51. a first transmission case; 52. a second transmission case; 53. a reciprocating screw; 54. a slider; 55. a first runner; 56. a first stirring blade; 57. a second rotating wheel; 58. a connecting shaft; 59. a transmission belt; 510. a third rotating wheel; 511. a second gear; 512. a third gear; 513. a fourth gear; 514. a fourth rotating wheel; 515. a fifth rotating wheel; 516. a support shaft; 517. a second stirring blade; 6. an oil inlet pipe; 7. a scale scraping mechanism; 71. a first scraper ring; 72. a transmission runner; 73. a limiting spring; 74. a second scraper ring; 75. a hauling rope; 76. an outer squeegee; 77. connecting blocks; 78. fixing an inner scraper; 79. a movable inner scraper; 710. an elastic case; 711. a tension spring; 8. a sand filtering mechanism; 81. a seal ring; 82. a slideway; 83. a first turntable; 84. a limiting ring; 85. a draw bar; 86. a second turntable; 87. adjusting a rod; 88. a screen frame; 89. a telescopic rod.

Detailed Description

The technical solutions of the present invention will be described below clearly and completely in conjunction with the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: referring to fig. 1-5, a long plunger anticorrosion oil well pump comprises a pump barrel 1, a plunger 2, an outer tube 3, a blind plug 4 and an oil inlet tube 6, wherein the pump barrel 1 is connected above the inner side wall of the outer tube 3 in a sliding manner, the plunger 2 is connected below the inner side wall of the outer tube 3 through the oil inlet tube 6, and the blind plug 4 is connected at the lower end of the outer tube 3; the pump barrel 1 is driven by a pull rod to reciprocate up and down in the outer tube 3, when the pump barrel 1 moves upwards in the outer tube 3, the traveling valve in the pump barrel 1 is closed, the traveling valve in the plunger 2 is opened, so that crude oil outside an oil well pump enters the plunger 2 from the position of the oil inlet tube 6 under the action of pressure difference generated by pulling up the pump barrel 1, excessive crude oil enters the pump barrel 1 from the position of an opening above the plunger 2, when the pump barrel 1 moves downwards in the outer tube 3, the traveling valve in the pump barrel 1 is opened, the traveling valve in the plunger 2 is closed, so that crude oil in the pump barrel 1 enters the outer tube 3 from the position of the opening above the pump barrel 1 under extrusion, the crude oil amount in the outer tube 3 is increased, and the crude oil can be transmitted to the outside from the corresponding position along a pipeline, and the oil pumping effect is achieved; an exhaust mechanism 5 is arranged at the middle position of the lower surface of the blind plug 4, the exhaust mechanism 5 comprises a first transmission box 51, a second transmission box 52 is integrally formed at one side of the upper surface of the first transmission box 51, the first transmission box 51 and the second transmission box 52 protect internal transmission components, so that the transmission components are not interfered by sand and stones in crude oil at the outer side, a reciprocating lead screw 53 is rotatably connected to the upper surface of the inner part of the blind plug 4 at the middle position corresponding to the pump barrel 1 and the outer tube 3, a sliding block 54 is connected to the outer side wall of the pump barrel 1 at the position corresponding to the reciprocating lead screw 53, a sliding part is connected to the inner side of the sliding block 54 at the position corresponding to the reciprocating lead screw 53, the sliding part slides in the inner side of a groove on the reciprocating lead screw 53, when the sliding block 54 moves up and down along with the pump barrel 1, the sliding part inside the sliding block 54 slides in the groove, the reciprocating lead screw 53 is difficult to move, so that the reciprocating lead screw 53 can only rotate along with the movement of the sliding block 54, the upper surface and the lower surface of the sliding block 54 are connected with telescopic hoses corresponding to the positions of the reciprocating screw 53, the telescopic hoses protect the reciprocating screw 53, sand and stones in crude oil are prevented from entering the groove to influence the position movement of the sliding block 54 on the reciprocating screw 53, the lower end of the reciprocating screw 53 close to the outer side of the blind plug 4 is connected with a first rotating wheel 55, the middle position of the lower surface of the blind plug 4 is rotatably connected with a first stirring blade 56 through a connecting shaft 58, the outer side wall of the connecting shaft 58 close to the upper part of the first stirring blade 56 is connected with a second rotating wheel 57, the first rotating wheel 55 and the second rotating wheel 57 are in transmission connection through a transmission belt 59, the reciprocating screw 53 drives the connecting shaft 58 to rotate through the transmission belt 59, the position of the lower surface in the first transmission box 51 close to the second transmission box 52 is rotatably connected with a third rotating wheel 510 through a rotating shaft, the position of the outer side wall of the rotating shaft for connecting the third rotating wheel 510 is connected with a first gear corresponding to the position of the second gear 511, the size of the external teeth of the first gear is the same as that of the external teeth of the second gear 511, another second rotating wheel 57 on the outer side wall of the connecting shaft 58 is mutually driven by a driving belt 59 and a third rotating wheel 510, the first gear on the outer side wall of the rotating shaft of the third rotating wheel 510 is mutually embedded with the second gear 511 and is driven to rotate, the position, close to the third rotating wheel 510, of the upper surface inside the second transmission box 52 is rotatably connected with the second gear 511 through the rotating shaft, the upper side of the outer side wall of the rotating shaft for connecting the second gear 511 is connected with a third gear 512, the lower side of the inner side wall inside the second transmission box 52 is rotatably connected with a fourth gear 513 through the rotating shaft, the third gear 512 and the fourth gear 513 which are coaxial with the second gear 511 are mutually vertical and are mutually embedded with each other, the fourth gear 513 is driven to rotate, one side of the rotating shaft for connecting the fourth driving belt gear 513 is connected with a fourth rotating wheel 514, the upper side of the inner side wall inside the second transmission box 52 is rotatably connected with a fifth rotating wheel 515 through a rotating shaft 516, the fourth rotating wheel 514 is in transmission connection with the fifth rotating wheel 59, so that a second supporting shaft 517 outside the second stirring blade 516 is driven to be driven by the driving shaft 516, and is driven by a second stirring blade 517 outside the side of the second transmission box 52, and is connected with a second stirring blade 517 outside the second stirring blade 517;

in the prior art, when the oil well pump extracts crude oil underground, because the crude oil is often accompanied by gas such as gas, carbon dioxide and the like, the crude oil in the gas is gathered into a bubble, when the oil well pump extracts the bubble position of the crude oil, the crude oil is difficult to extract, the gas enters the oil well pump along the oil inlet pipe 6, the space for extracting the crude oil in the oil well pump is occupied, the crude oil amount extracted each time before the gas is discharged in the oil well pump is reduced, the time for extracting the same amount of crude oil is prolonged, and the efficiency for extracting the crude oil by the oil well pump is reduced; the pump barrel 1 moves up and down when crude oil extraction operation is carried out, so that the sliding block 54 connected with the pump barrel 1 drives the reciprocating lead screw 53 to rotate, the reciprocating lead screw 53 drives the connecting shaft 58 to rotate due to the transmission connection between the first rotating wheel 55 and the second rotating wheel 57 at the lower end through the transmission belt 59, the first stirring blade 56 connected below the outer side wall of the connecting shaft 58 is used for stirring the crude oil in the well, the crude oil is mixed with each other, gas in the crude oil is difficult to gather into a large bubble, and the oil well pump cannot cause empty extraction operation due to the extraction of the gas in the large bubble during extraction, the other second rotating wheel 57 on the connecting shaft 58 is driven by a driving belt 59 and a third rotating wheel 510, the third rotating wheel 510 is driven to rotate by mutual embedding between a first gear and a second gear 511 on the outer side wall of the rotating shaft, the second gear 511 is driven to rotate by mutual embedding between a third gear 512 and a fourth gear 513 on the same shaft, so that a fifth rotating wheel 515 driven by the driving belt 59 rotates, a second stirring blade 517 coaxial with the fifth rotating wheel 515 rotates to stir and mix crude oil liquid to be entered into the position of the oil inlet pipe 6, further, the occurrence of idle extraction operation of the oil well pump caused by gas in the crude oil is avoided, and the influence on the oil pumping efficiency of the oil well pump is reduced.

Example 2: referring to fig. 6-10, a dirt scraping mechanism 7 is disposed on the inner side wall of the outer tube 3, the dirt scraping mechanism 7 includes a transmission wheel 72, three reciprocating screws 53 are sleeved on the inner side of the transmission wheel 72 on the outer side wall of the reciprocating screw 53 through a transmission belt 59 for transmission connection, the three reciprocating screws 53 are distributed on the inner lower surface of the blind plug 4 in a regular triangle shape, the outer side wall of the reciprocating screw 53 is connected with a first dirt scraping ring 71 in a sliding manner, the first dirt scraping ring 71 includes an outer scraper 76, the inner side wall of the outer scraper 76 is connected with a fixed inner scraper 78 through a connection block 77, a slide hole is formed on the upper surface of the connection block 77 corresponding to the reciprocating screw 53, the inner diameter of the slide hole is the same as the outer diameter of the reciprocating screw 53, the inner side wall of the slide hole is connected with a sliding member, so that the first dirt scraping ring 71 moves up and down on the inner side of the outer tube 3 under the support of the three reciprocating screws 53 during the rotation of the reciprocating screw 53, the outer scraper 76 and the fixed inner scraper 78 on the first scale scraping ring 71 respectively scrape off the dirt on the inner side wall of the outer tube 3 and the outer side wall of the pump barrel 1, the inner side of the pump barrel 1 near the middle position of the pump barrel 1 and the plunger 2 is connected with the second scale scraping ring 74, the second scale scraping ring 74 comprises an elastic box 710, the inner side wall of the elastic box 710 is connected with a sealing gasket corresponding to a connecting piece, one side of the outer side wall of the elastic box 710 is integrally formed with the outer scraper 76, the other side of the outer side wall of the elastic box 710 is connected with a movable inner scraper 79 in a sliding way through the connecting piece, the inner part of the elastic box 710 is connected with a telescopic spring 711 corresponding to the connecting piece, the outer scraper 76 and the movable inner scraper 79 on the second scale scraping ring 74 are six in number and are fan-shaped when the dirt on the inner side wall of the pump barrel 1 and the outer side wall of the plunger 2 is cleaned, the six movable inner scrapers 79 are annularly connected to the inner side wall of the second scale scraping ring 74, the movable inner scraper 79 is connected with a telescopic spring 711 inside the elastic box 710 through a connecting member, so that when the movable inner scraper 79 passes through the position of the protrusion outside the plunger 2, the movable inner scraper 79 can enter the inner side of the elastic box 710 through the contraction of the connecting piece to move, the movable inner scraper 79 is always in close contact with the outer wall of the plunger 2 before and after moving, the cleaning of dirt on the outer wall of the plunger 2 is not influenced, the position movement of the movable inner scraper 79 cannot be influenced by the obstruction of the bulge on the plunger 2, the position of the lower surface of the inner part of the pump cylinder 1 corresponding to the second scale scraping ring 74 is connected with a limiting spring 73, one side of the upper surface of the second scale scraping ring 74 is connected with a traction rope 75, the position of the outer side wall of the pump cylinder 1 corresponding to the traction rope 75 is provided with a hole with the same external diameter as the traction rope 75, the hole is blocked by the traction rope 75 and is not easy to leak oil and release pressure, the second scraping ring 74 is connected with the first scraping ring 71 through a traction rope 75, the traction rope 75 penetrates through a hole on the outer side wall of the pump barrel 1, so that when the first scraping ring 71 moves downwards on the reciprocating screw rod 53, the traction rope 75 pulls the second scraping ring 74 to move upwards, when the second scraping ring 74 moves upwards, the limiting spring 73 is stretched and lengthened, when the first scale scraping ring 71 moves upwards, the second scale scraping ring 74 is reset under the action of the retraction force of the limiting spring 73, the middle positions of the upper surfaces of the first scale scraping ring 71 and the second scale scraping ring 74 are both provided with circulation holes, so that the first scale scraping ring 71 and the second scale scraping ring 74 cannot obstruct the flow of crude oil in the oil well pump, the upper surface of the plunger 2 is also connected with the scale scraping rings through connecting rods, during the up-and-down reciprocating motion of the pump cylinder 1, the descaling operation of the area which cannot be reached by the second descaling ring 74 on the inner side wall of the pump cylinder 1 is facilitated; in the prior art, in the process of extracting crude oil for a long time, impurities in the crude oil and stains in the sewage are adhered to the inner wall of the oil well pump due to the fact that the oil well pump needs to reinject the sewage in the operation process of extracting the crude oil, the movable space of the pump cylinder 1 is reduced due to the fact that the inner space of the oil well pump is increased due to the increase of the amount of the stains, and the oil well pump is difficult to continue oil pumping operation after the pump cylinder 1 is blocked and cannot move; when the reciprocating screw 53 rotates, the first scale scraping rings 71 which slide outside the reciprocating screw 53 through the sliding pieces in the connecting blocks 77 can do up-and-down reciprocating motion of positions when the reciprocating screw 53 rotates, dirt on the inner side wall of the outer tube 3 and the outer side wall of the pump barrel 1 is scraped through up-and-down movement of the first scale scraping rings 71 which are sleeved outside the reciprocating screw 53, the second scale scraping rings 74 are drawn by the drawing ropes 75 in the moving process of the first scale scraping rings 71 to move so as to scrape off dirt on the inner side wall of the pump barrel 1 and the outer side wall of the plunger 2, and in the up-and-down moving process of the pump barrel 1, the scale scraping rings connected to the upper end of the plunger 2 can scrape off dirt on the area which the second scale scraping rings 74 cannot touch on the inner wall of the pump barrel 1, so that when the pump barrel 1 moves inside the outer tube 3, the dirt cannot be blocked by the inner wall of the outer tube 3 and the outer wall of the plunger 2, and can normally slide up and down on the positions, and the accumulated oil pumping operation is not affected.

Example 3: referring to fig. 11-13, a sand filtering mechanism 8 is disposed on the lower surface inside the plunger 2, the sand filtering mechanism 8 includes a first rotating disc 83, a sealing ring 81 is connected to the outer side wall of the first rotating disc 83, the sealing ring 81 prevents the raw oil inside the plunger 2 from entering the sealing ring 81 to affect the normal extension and retraction of the telescopic rod 89 inside, a plurality of evenly distributed telescopic rods 89 are connected to the outer side of the upper surface of the first rotating disc 83, a rotating sleeve is rotatably connected to the lower surface of the second rotating disc 86 at a position corresponding to the telescopic rod 89, the rotating sleeve can adjust the included angle between the telescopic rod 89 and the second rotating disc 86 during the rotation of the second rotating disc 86, the second rotary disc 86 can stably rotate under the support of the telescopic rod 89, the upper end of the telescopic rod 89 is provided with the second rotary disc 86, the outer side wall of the second rotary disc 86 is integrally formed with a limiting ring 84, the position of the inner side wall of the sealing ring 81, which corresponds to the limiting ring 84, is provided with a limiting chute, the limiting ring 84 is embedded inside the limiting chute, so that the second rotary disc 86 can not generate position deviation in the rotating process, one side of the upper surface of the second rotary disc 86 is rotatably connected with a traction rod 85 through a rotating shaft, one end of the traction rod 85 is rotatably connected with an adjusting rod 87 through the rotating shaft, in the rotating process of the second rotary disc 86, the filter screen frame 88 connected with the adjusting rod 87 is pulled by the traction rod 85 to slide at the inner side of the slideway 82, the upper surface and the lower surface of the inner part of the oil inlet pipe 6 are provided with the slideway 82, the position of the inner side wall of the slideway 82, which corresponds to the filter screen frame 88, is provided with a chute, the positions of the two sides of the outer side wall of the filter screen frame 88, which correspond to the chute, are connected with sliding limiting strips, the sliding limiting strips are embedded at the inner side of the chute, so that the filter screen frame 88 is always kept in a vertical state with the slideway 82 in the sliding process, and the inner side wall of the slideway 82 is connected with the filter screen frame 88 in a sliding manner; in the prior art, as more gravels are contained in the extraction of underground crude oil, a sand control structure is additionally arranged in the oil well pump, the gravels entering along with the crude oil cannot enter the movable position of the pump barrel 1 under the obstruction of the sand control structure, the gravels entering the oil well pump are deposited at the position of the blind plug 4 at the bottom of the oil well pump under the action of gravity, the size of the space at the bottom of the oil well pump is fixed, and the accumulated gravels are easy to block the position of the sand control structure along with the increase of the amount of the gravels accumulated at the bottom of the oil well pump in the long-time working process of the oil well pump, so that the oil pumping speed caused by the oil well pump is influenced; the connecting shaft 58 can drive the first rotating disc 83 connected to the top end of the connecting shaft 58 to rotate in the rotating process, the first rotating disc 83 is connected with the second rotating disc 86 through the telescopic rod 89, in the rotating process of the first rotating disc 83, the second rotating disc 86 is embedded in the limiting sliding groove of the sealing ring 81 through the limiting ring 84 integrally formed on the outer side to rotate, the same inclination angle as that of the sliding rail 82 is kept constantly in the rotating process, the filter screen frame 88 is pulled to slide on the inner side of the sliding rail 82 through the traction rod 85 through the rotating second rotating disc 86, in the process that the filter screen frame 88 slides back and forth on the sliding rail 82, sand in crude oil entering the plunger 2 from the oil inlet pipe 6 position can be filtered, the filtered sand is pushed to be discharged out of the outer side in the process that the filter screen frame 88 moves outwards, the sand discharged out of the oil well pump is far away from the oil inlet pipe 6 position under the rotating centrifugal force of the second stirring blade 517, and the sand entering the oil inlet pipe 6 position again can not cause adverse effects on the filtering operation of the filter screen frame 88.

When the invention is used, the pump cylinder 1 is driven by the pull rod to reciprocate up and down in the outer pipe 3, when the pump cylinder 1 moves upwards in the outer pipe 3, the traveling valve in the pump cylinder 1 is closed, the traveling valve in the plunger 2 is opened, so that crude oil outside an oil well pump enters the plunger 2 from the position of the oil inlet pipe 6 under the action of pressure difference generated by the upward pulling of the pump cylinder 1, excessive crude oil enters the pump cylinder 1 from the position of an opening above the plunger 2, when the pump cylinder 1 moves downwards in the inner side of the outer pipe 3, the traveling valve in the pump cylinder 1 is opened, the traveling valve in the plunger 2 is closed, so that the crude oil in the pump cylinder 1 enters the outer pipe 3 from the position of the opening above the pump cylinder 1 under the extrusion, the crude oil amount in the outer pipe 3 is increased, the crude oil can be transmitted to the outside from the corresponding position along a pipeline, the oil pumping effect is achieved, and in the process that the pump cylinder 1 reciprocates up and down in the outer pipe 3, through the interaction between the sliding block 54 connected on the outer side wall of the pump barrel 1 and the reciprocating screw 53, the sliding block 54 drives the reciprocating screw 53 to rotate when reciprocating up and down, the first rotating wheel 55 connected on one end of the reciprocating screw 53 is driven by the driving belt 59 and the second rotating wheel 57, the reciprocating screw 53 drives the connecting shaft 58 connected with the second rotating wheel 57 to rotate, the first stirring blade 56 on the outer side wall of the connecting shaft 58 stirs and mixes the crude oil in the well, the connecting shaft 58 is driven by the other second rotating wheel 57 connected on the outer side wall of the connecting shaft 58 and the third rotating wheel 510, the first gear on the outer side wall of the rotating shaft of the third rotating wheel 510 is perpendicular to and embedded with the second gear 511, the connecting shaft 58 can be sleeved on the second rotating wheel 57 and the third rotating wheel 510 by the driving belt 59 to drive the second gear 511 to rotate, the third gear 512 and the fourth gear 513 on the same shaft of the second gear 511 are perpendicular to each other and are embedded with each other, and the fourth rotating wheel 514 on the same shaft of the fourth gear 513 is in transmission with the fifth rotating wheel 515 on the outer side wall of the supporting shaft 516 through the transmission belt 59, so that the third gear 512 drives the supporting shaft 516 to rotate, so that the second stirring blade 517 on the outer side wall of the supporting shaft 516 rotates to stir the crude oil entering the position of the oil inlet pipe 6, the first scale scraping ring 71 connected to the outer side wall of the reciprocating screw 53 through the connecting block 77 can reciprocate up and down on the outer side wall of the reciprocating screw 53 in the process of rotating the reciprocating screw 53, so that the outer scraping plates 76 and the fixed inner scraping plates 78 on both sides of the first scale scraping ring 71 can clean the dirt on the inner side wall of the outer tube 3 and the outer side wall of the pump barrel 1 respectively, and the first scale scraping ring 71 passes through the hole on the outer side wall of the pump barrel 1 through the traction rope 75 to be connected with the second scale scraping ring 74 in the process of moving up and down, when the first scale scraping ring 71 moves upwards, the second scale scraping ring 74 is pulled by the second scale scraping ring 74, and when the second scale scraping ring 74 is pulled by the pump cylinder 1 to move upwards, the limiting spring 73 connected to the lower surface of the second scale scraping ring 74 is stretched to be lengthened, so that the second scale scraping ring 74 reciprocates up and down on the inner side of the pump cylinder 1 under the pulling of the first scale scraping ring 71, so that the outer scraper 76 and the movable inner scraper 79 on the second scale scraping ring 74 clean the dirt on the inner side wall of the pump cylinder 1 and the outer side wall of the plunger 2 respectively, the number of the movable inner scrapers 79 is six, the movable inner scrapers 79 are fan-shaped, the six movable inner scrapers 79 are circularly connected to the inner side of the second scale scraping ring 74, the movable inner scraper 79 is connected with the telescopic spring 711 in the elastic box 710 through a connecting piece, so that when the movable inner scraper 79 passes through the convex position on the outer side of the plunger 2, the movable inner scraper 79 can enter the inner side of the elastic box 710 through the contraction of the connecting piece to move, the movable inner scraper 79 is always in close contact with the outer wall of the plunger 2 before and after moving, the cleaning of dirt on the outer wall of the plunger 2 is not influenced, the position movement of the movable inner scraper 79 cannot be influenced due to the obstruction of the bulge on the plunger 2, the first rotary disc 83 rotates along with the connecting shaft 58 in the rotating process of the connecting shaft 58, the second rotary disc 86 connected through the telescopic rod 89 synchronously rotates, the limiting ring 84 integrally formed with the second rotary disc 86 slides in the limiting sliding groove on the inner side wall of the sealing ring 81, the draw rod 85 connected to the upper surface of the second rotary disc 86 through the rotating shaft in the rotating process of the second rotary disc 86 draws the filter screen frame 88 to slide at the inner side of the slideway 82 through the draw adjusting rod 87, sand entering the raw oil liquid inside the plunger 2 from the position of the oil inlet pipe 6 is filtered, the filtered sand is pushed to be discharged out of the oil well pump in the outward moving process of the filter screen frame 88, and the sand discharged out of the oil pump is far away from the position of the oil inlet pipe 6 under the centrifugal force action of the second stirring blade 517, and the filter screen 88 can not influence the bad filtering operation of the filter screen 88.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (7)

1. The long-plunger anti-corrosion oil well pump comprises a pump barrel (1), a plunger (2), an outer tube (3), a blind plug (4) and an oil inlet tube (6), wherein the pump barrel (1) is connected above the inner side wall of the outer tube (3) in a sliding manner, the plunger (2) is connected below the inner side wall of the outer tube (3) through the oil inlet tube (6), and the blind plug (4) is connected to the lower end of the outer tube (3), and is characterized in that an exhaust mechanism (5) is arranged in the middle of the lower surface of the blind plug (4); the exhaust mechanism (5) comprises a first transmission box (51), a second transmission box (52) is integrally formed on one side of the upper surface of the first transmission box (51), the inner upper surface of the blind plug (4) corresponds to the pump barrel (1) and the middle position of the outer tube (3) in a rotating mode, a reciprocating lead screw (53) is connected to the outer side wall of the pump barrel (1) in a corresponding mode, a sliding block (54) is connected to the position of the reciprocating lead screw (53), the lower end, close to the outer side of the blind plug (4), of the reciprocating lead screw (53) is connected with a first rotating wheel (55), the middle position of the lower surface of the blind plug (4) is connected with a first stirring blade (56) in a rotating mode through a connecting shaft (58), the outer side wall of the connecting shaft (58) is close to the position of the first stirring blade (56) in a rotating mode and is connected with a second rotating wheel (57), the first rotating wheel (55) is connected with the second rotating wheel (57) in a transmitting mode through a transmission belt (59), the inner lower surface of the first transmission box (51) is close to the position of the second transmission box (52) in a rotating mode and is connected with a third rotating wheel (511) in a rotating mode through a rotating gear (511), second transmission case (52) inside wall below rotates through the pivot and is connected with fourth gear (513), one side that fourth gear (513) are connected with the pivot is connected with fourth runner (514), second transmission case (52) inside wall top rotates through back shaft (516) and is connected with fifth runner (515), back shaft (516) lateral wall is close to one side in second transmission case (52) outside is connected with second stirring leaf (517).

2. The long-plunger anticorrosion oil well pump as claimed in claim 1, wherein a scale scraping mechanism (7) is arranged on the inner side wall of the outer pipe (3); the scale scraping mechanism (7) comprises a transmission runner (72), three reciprocating lead screws (53) are sleeved on the inner sides of the transmission runners (72) on the outer side walls of the reciprocating lead screws (53) through transmission belts (59) for transmission connection, the outer side walls of the reciprocating lead screws (53) are connected with first scale scraping rings (71) in a sliding mode, the inner sides of the pump cylinders (1) close to the middle positions of the pump cylinders (1) and the plunger (2) are connected with second scale scraping rings (74), the positions, corresponding to the second scale scraping rings (74), of the lower surfaces in the pump cylinders (1) are connected with limiting springs (73), and one sides of the upper surfaces of the second scale scraping rings (74) are connected with traction ropes (75); the first scale scraping ring (71) comprises an outer scraper (76), and the inner side wall of the outer scraper (76) is connected with a fixed inner scraper (78) through a connecting block (77); the second is scraped dirty and is encircled (74) including elasticity case (710), elasticity case (710) lateral wall one side integrated into one piece has outer scraper blade (76), scraper blade (79) in the activity are passed through connecting piece sliding connection to elasticity case (710) lateral wall opposite side, elasticity case (710) inside corresponds connecting piece position department and is connected with expanding spring (711).

3. The long-plunger anticorrosion oil well pump as claimed in claim 1, wherein a sand filtering mechanism (8) is arranged on the inner lower surface of the plunger (2); filter sand mechanism (8) including first carousel (83), first carousel (83) lateral wall is connected with sealing washer (81), first carousel (83) upper surface outside is connected with a plurality of evenly distributed's telescopic link (89), telescopic link (89) upper end is equipped with second carousel (86), second carousel (86) lateral wall integrated into one piece has spacing ring (84), second carousel (86) upper surface one side is rotated through the pivot and is connected with traction lever (85), traction lever (85) one end is rotated through the pivot and is connected with regulation pole (87), slide (82) have been seted up to the inside upper and lower surface of advancing oil pipe (6), slide (82) inside wall sliding connection has filter screen frame (88).

4. The long-plunger anti-corrosion oil well pump is characterized in that a first gear is connected to the position, corresponding to the second gear (511), above the outer side wall of a rotating shaft for connecting the third rotating wheel (510), the size of the outer teeth of the first gear is the same as that of the outer teeth of the second gear (511), and telescopic hoses are connected to the positions, corresponding to the reciprocating lead screw (53), of the upper surface and the lower surface of the sliding block (54).

5. The long-plunger anticorrosion oil well pump as claimed in claim 2, wherein a slide hole is formed in a position, corresponding to the reciprocating lead screw (53), of the upper surface of the connecting block (77), the inner diameter of the slide hole is the same as the outer diameter of the reciprocating lead screw (53), a hole, the outer diameter of which is the same as the outer diameter of the traction rope (75), is formed in a position, corresponding to the traction rope (75), of the outer side wall of the pump barrel (1), a sliding piece is connected to the inner side wall of the slide hole, a sealing pad is connected to a position, corresponding to the connecting piece, of the inner side wall of the elastic box (710), and circulation holes are formed in positions, corresponding to the middle positions, of the upper surfaces of the first scale scraping ring (71) and the second scale scraping ring (74).

6. The long-plunger anticorrosion oil well pump as claimed in claim 3, wherein a rotary sleeve is rotatably connected to a position of the lower surface of the second rotary disc (86) corresponding to the telescopic rod (89), a limiting chute is formed in a position of the inner side wall of the sealing ring (81) corresponding to the limiting ring (84), a chute is formed in a position of the inner side wall of the slideway (82) corresponding to the filter screen frame (88), and sliding limiting strips are connected to positions of two sides of the outer side wall of the filter screen frame (88) corresponding to the chutes.

7. The long-plunger anticorrosion oil-well pump of claim 1, wherein the use method of the long-plunger anticorrosion oil-well pump comprises the following steps: the method comprises the following steps: after the oil well pump is placed underground, the pump cylinder (1) can be pushed up and down in a reciprocating mode through the pull rod, so that the pump cylinder (1) interacts with the plunger (2) inside the outer pipe (3), underground crude oil enters the plunger (2) through the position of the oil inlet pipe (6), overflows to the inner side of the pump cylinder (1) from the upper portion of the plunger (2) under the action of pressure difference, overflows to the inner side of the outer pipe (3) from the upper portion of the pump cylinder (1), and is transmitted to a specified place from a corresponding pipeline to be treated; step two: in the process that the pump barrel (1) reciprocates up and down in the outer tube (3), the sliding block (54) drives the reciprocating lead screw (53) to rotate when reciprocating up and down through the interaction between the sliding block (54) connected to the outer side wall of the pump barrel (1) and the reciprocating lead screw (53), a first rotating wheel (55) connected to one end of the reciprocating lead screw (53) is driven by a driving belt (59) to be in transmission with a second rotating wheel (57), the reciprocating lead screw (53) drives a connecting shaft (58) connected with the second rotating wheel (57) to rotate, and a first stirring blade (56) on the outer side wall of the connecting shaft (58) stirs and mixes underground crude oil, the connecting shaft (58) is in transmission with the third rotating wheel (510) through another second rotating wheel (57) connected to the outer side wall of the connecting shaft (58), a first gear and a second gear (511) on the outer side wall of a rotating shaft of the third rotating wheel (510) are perpendicular to each other and are mutually embedded, so that the connecting shaft (58) can be sleeved on the second rotating wheel (57) and the third rotating wheel (510) through a transmission belt (59) to drive the second gear (511) to rotate, a third gear (512) and a fourth gear (513) on the same shaft of the second gear (511) are perpendicular to each other and are mutually embedded, and a fourth rotating wheel (514) on the same shaft of the fourth gear (513) is in transmission with a fifth rotating wheel (515) on the outer side wall of the supporting shaft (516) through the transmission belt (59) The third gear (512) drives the supporting shaft (516) to rotate, and the second stirring blade (517) on the outer side wall of the supporting shaft (516) rotates to stir the crude oil entering the position of the oil inlet pipe (6); step three: the first scale scraping ring (71) connected to the outer side wall of the reciprocating screw rod (53) through the connecting block (77) can do up-and-down reciprocating motion on the outer side wall of the reciprocating screw rod (53) in the process that the reciprocating screw rod (53) rotates, so that an outer scraper (76) and a fixed inner scraper (78) on two sides of the first scale scraping ring (71) can respectively clean dirt on the inner side wall of the outer pipe (3) and the outer side wall of the pump barrel (1), the first scale scraping ring (71) passes through a hole in the outer side wall of the pump barrel (1) through a traction rope (75) to be connected with the second scale scraping ring (74) in the process of moving up and down, so that the second scale scraping ring (74) is dragged in the process of moving up and down by the traction rope, the limiting spring (73) connected to the lower surface of the second scale scraping ring (74) is lengthened, and the second scale scraping ring (74) is dragged in the process of moving up and down by the traction of the inner side wall of the pump barrel (1), so that the second scale scraping ring (74) drags up and down the outer side wall of the pump barrel (1) and a plunger (79) respectively cleans dirt on the reciprocating screw rod (1) and a plunger (79); step four: in the rotating process of the connecting shaft (58), the first rotating disc (83) rotates along with the connecting shaft (58), so that the second rotating disc (86) connected through the telescopic rod (89) synchronously rotates, the limiting ring (84) integrally formed with the second rotating disc (86) slides inside the limiting sliding groove in the inner side wall of the sealing ring (81), and the second rotating disc (86) slides in the position in the rotating process of the traction rod (85) connected to the upper surface of the second rotating disc (86) through the rotating shaft to pull the filter screen frame (88) to slide on the inner side of the sliding channel (82) through the traction adjusting rod (87).

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