A direct-drive surface screw pump oil production device and operation method thereof

Abstract

The present invention discloses a direct-drive ground screw pump oil production device and an operation method thereof, comprising two support frames, the two support frames have the same structure, the two support frames are welded to each other, a first motor is installed on the top of the support frame, a double-row tooth sprocket is installed on the end of the output shaft of the first motor, the double-row tooth sprocket is connected with a first sprocket and a second sprocket through a chain transmission, the first sprocket is sleeved on the first sprocket shaft, the second sprocket is sleeved on the second sprocket shaft, and upper sprockets are sleeved on both ends of the first sprocket shaft and the second sprocket shaft. The present invention arranges the foundation support plates on both sides of the two support frames, so that during wellhead excavation and oil production, the two support frames can be fixed on the ground, effectively preventing the vibration of the spiral dragon during wellhead excavation and the vibration of the shell pumping oil during oil production from causing the support frame to shake, and solving the technical problem that the oil production device in the prior art does not meet the excavation of the oil well and causes the support frame to shake during oil production.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production, and in particular to a direct-drive ground screw pump oil production device and an operating method thereof. Background Art

[0002] At present, in the field of mechanical oil production in oil fields, the screw pump motor direct drive device is a widely used oil pumping device.

[0003] The patent document (CN201710230436.3) discloses a screw pump ground direct drive oil production device, which optimizes the structure of the prior art to reduce the number of parts, simplify the equipment structure, and reduce the equipment cost. However, the screw pump oil production device does not have the function of oil well production. At the same time, in the prior art, oil well production is completed by a spiral dragon. When facing oil well production on land with hard geology, the spiral dragon needs a stronger impact force to complete the oil well production. The above-mentioned screw pump oil production device has poor passability in complex wellbores and has severe eccentric wear. Summary of the invention

[0004] The object of the present invention is to provide a direct-drive ground screw pump oil production device and an operating method thereof, so as to solve the following technical problems: (1) by setting two support frames, one support frame is provided with a spiral dragon, and the other support frame is provided with a screw pump, so that the oil production device can meet the requirements of oil production and wellhead excavation at the same time, and the two support frames can slide on the track to facilitate direct oil production after the spiral dragon wellhead is excavated. The telescopic cylinder piston rods on the fixing blocks of the two support frames are contracted, and then the lifting rods are driven down through the lifting bars, and the lifting rods drive the foundation support plates to press downward on the ground to fix the support frames. The foundation support plates on both sides are arranged so that the two support frames can be fixed on the ground during wellhead excavation and oil extraction, effectively preventing the support frames from shaking due to the vibration of the spiral dragon during wellhead excavation and the vibration of the shell pumping oil during oil extraction, thereby solving the technical problem that the oil extraction device in the prior art does not meet the requirements of oil well excavation and the support frames will shake during oil extraction; (2) the double-row toothed sprocket is driven to rotate by the first motor output shaft on the support frame, and the double-row toothed sprocket drives the first sprocket and the second sprocket to rotate respectively through the chain, the first sprocket drives the first sprocket shaft to rotate, the second sprocket drives the second sprocket shaft to rotate, and the first sprocket shaft and the second sprocket shaft are driven to rotate. The sprocket shaft drives the upper sprocket to rotate, and the upper sprocket cooperates with the lower sprocket to drive the spiral dragon and the shell to rise and fall. Through this arrangement, the spiral dragon and the shell can be automatically lifted and lowered, which is convenient for wellhead mining and oil extraction, and has strong practicality. The output shaft of the driving motor drives one of the first shaft rods to rotate, and the two first shaft rods rotate through gears. The first shaft rod drives the first connecting rod to rotate, the first connecting rod cooperates with the second connecting rod to rotate, the second connecting rod cooperates with the third connecting rod to rotate, and the third connecting rod drives the lifting frame to descend. The output shaft of the second motor drives the spiral dragon to rotate, and the spiral dragon drills a hole in the ground. Through this arrangement, the spiral dragon descends and the first connecting rod is The cooperation of the first connecting rod, the second connecting rod and the third connecting rod increases the impact force of the spiral dragon downward mining, solving the technical problem that the prior art cannot adapt to the mining of hard soil when digging oil wells; (3) the well fluid enters the internal space of the oil pipe joint by relying on the downhole pressure, and then the well fluid enters the internal space of the transmission joint and enters the well fluid storage space through the transmission joint. The output shaft of the screw pump drives the screw to rotate, the screw drives the flexible shaft to rotate, the flexible shaft drives the transmission joint to rotate, and the screw cooperates with the stator to transport the oil to the oil outlet chamber to complete the oil extraction, solving the technical problems of the prior art that the outer shell has poor permeability in complex wellbores and serious eccentric wear.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The transmission gear of the present invention is a gearbox which is connected with the transmission gear of the present invention to the gearbox, and the gearbox is connected with the gear of the transmission gear of the present invention to the gearbox by the spring which is connected with the transmission gear of the present invention.

[0007] An upper connecting plate is installed at the bottom of one of the lifting support plates, and two first shaft rods are rotatably arranged on the upper connecting plate, and two meshing gears are sleeved on the same side of the two first shaft rods, and a second connecting rod is rotatably connected to the third shaft rod, and four second connecting rods are rotatably connected to the two third shaft rods, and four second connecting rods are rotatably connected to the two fourth shaft rods, and third connecting rods are rotatably installed at both ends of the fourth shaft rod, and one end of the third connecting rod away from the fourth shaft rod is rotatably connected to the second shaft rod, and the four third connecting rods are rotatably connected to the two ends of the two second shaft rods, respectively, and the two second shaft rods are installed on the lower connecting plate, and the lower connecting plate is installed on the top of the lifting frame, and a second motor is installed on the lifting frame, and the output shaft of the second motor is connected to a spiral dragon;

[0008] An oil outlet cavity is installed on the upper surface of the other lifting support plate, a screw pump is installed on the top of the oil outlet cavity, the output shaft of the screw pump passes through the oil outlet cavity and is connected to a screw, a stator is arranged on the outside of the screw, the stator is arranged in the inner cavity of the outer shell, and an oil pipe joint is installed at the bottom of the outer shell.

[0009] Furthermore, support columns are symmetrically installed on both sides of the support frame, and two guide frames are symmetrically installed on both sides of the lifting support plate. Three guide wheels are rotatably arranged on the guide frames, and the three guide wheels all contact the side walls of the support columns.

[0010] Furthermore, four of the second connecting rods are rotatably mounted on two ends of the fifth shaft rod in pairs, and the second connecting rod is rotatably connected to the fourth shaft rod at one end away from the third shaft rod.

[0011] Furthermore, both ends of the first sprocket shaft and the second sprocket shaft are connected to shaft seats respectively, and the shaft seats are fixed to the top of the support frame.

[0012] Furthermore, both ends of the two first shaft rods are rotatably connected to the first connecting rods, and one end of the first connecting rod away from the first shaft rods is rotatably connected to the third shaft rod.

[0013] Furthermore, the bottom of the screw is connected to a flexible shaft, the bottom of the flexible shaft is connected to a transmission joint, the transmission joint is a hollow structure, a protector is installed on the outer wall of the transmission joint, and the bottom of the transmission joint is connected to an oil pipe joint.

[0014] Furthermore, four sliders are installed at the bottom of the two support frames, two tracks are arranged under the two support frames, and the two support frames slide on the two tracks through the four sliders.

[0015] Furthermore, fixed blocks are symmetrically installed on both sides of the two support frames, two telescopic cylinders are installed on the fixed blocks, lifting strips are installed at the ends of the piston rods of the telescopic cylinders, lifting rods are fixed at both ends of the bottom of the lifting strips, and four lifting rods are installed on the upper surface of the foundation support plate.

[0016] Furthermore, a driving motor is installed on the lower surface of the upper connecting plate, and an output shaft of the driving motor is connected to one of the first shafts.

[0017] Furthermore, a method for operating a direct-drive surface screw pump oil production device comprises the following steps:

[0018] Step 1: Push the support frame with the spiral dragon along the track to above the oil production position, the telescopic cylinder piston rods on the two support frame fixing blocks are contracted, and then the lifting rod is driven to descend through the lifting bar, and the lifting rod drives the foundation support plate to press downward on the ground to fix the support frame, and the first motor output shaft on the support frame with the spiral dragon drives the double-row toothed sprocket to rotate, and the double-row toothed sprocket drives the first sprocket and the second sprocket to rotate through the chain, the first sprocket drives the first sprocket shaft to rotate, the second sprocket drives the second sprocket shaft to rotate, the first sprocket shaft and the second sprocket shaft drive the upper sprocket to rotate, and the upper sprocket cooperates with the lower sprocket to drive the spiral dragon to descend, and at the same time, the driving motor output shaft drives one of the first shaft rods to rotate, the two first shaft rods rotate through gears, the first shaft rod drives the first connecting rod to rotate, the first connecting rod cooperates with the second connecting rod to rotate, the second connecting rod cooperates with the third connecting rod to rotate, the third connecting rod drives the lifting frame to descend, the second motor output shaft drives the spiral dragon to rotate, and the spiral dragon drills a hole in the ground;

[0019] Step 2: After the drilling is completed, the telescopic cylinder pushes the lifting bar upwards through the piston rod, and the lifting bar drives the foundation support plate to rise. The foundation support plate does not contact the ground, and the support frame with the shell is pushed along the track to above the drilling position. The telescopic cylinder piston rods on the two support frame fixing blocks shrink, and then drive the lifting rod to descend through the lifting bar. The lifting rod drives the foundation support plate to press down on the ground to fix the support frame. The first motor output shaft on the support frame with the shell drives the double-row tooth sprocket to rotate, and the double-row tooth sprocket drives the first sprocket and the second sprocket to rotate respectively through the chain. The first sprocket drives the first sprocket shaft to rotate, the second sprocket drives the second sprocket shaft to rotate, the first sprocket shaft and the second sprocket shaft drive the upper sprocket to rotate, the upper sprocket cooperates with the lower sprocket to drive the outer shell to descend, and then drives the oil pipe joint to descend to the well fluid position, the well fluid enters the internal space of the oil pipe joint depending on the downhole pressure, and then the well fluid enters the internal space of the transmission joint, and enters the well fluid storage space through the transmission joint, the output shaft of the screw pump drives the screw to rotate, the screw drives the flexible shaft to rotate, the flexible shaft drives the transmission joint to rotate, the screw cooperates with the stator to transport the oil to the oil outlet chamber, and completes the oil extraction.

[0020] Beneficial effects of the present invention:

[0021] (1) A direct-drive ground screw pump oil production device and an operating method thereof of the present invention are provided with two support frames, one support frame is provided with a screw dragon, and the other support frame is provided with a screw pump, so that the oil production device can meet the requirements of oil production and wellhead excavation at the same time. The two support frames can slide on the track to facilitate direct oil production after the wellhead excavation of the screw dragon is completed. The telescopic cylinder piston rods on the fixing blocks of the two support frames are contracted, and then the lifting rods are driven down through the lifting bars. The lifting rods drive the foundation support plates to press downward on the ground to fix the support frames. The foundation support plates on both sides of the two support frames are provided, so that the two support frames can be fixed on the ground during wellhead excavation and oil production, effectively preventing the support frames from shaking due to the vibration of the screw dragon during wellhead excavation and the vibration of the shell pumping oil during oil production;

[0022] (2) The first motor output shaft on the support frame drives the double-row toothed sprocket to rotate, and the double-row toothed sprocket drives the first sprocket and the second sprocket to rotate respectively through the chain, the first sprocket drives the first sprocket shaft to rotate, the second sprocket drives the second sprocket shaft to rotate, the first sprocket shaft and the second sprocket shaft drive the upper sprocket to rotate, and the upper sprocket cooperates with the lower sprocket to drive the spiral dragon and the shell to rise and fall. Through this arrangement, the spiral dragon and the shell can be automatically lifted and lowered, which is convenient for wellhead mining and oil extraction, and has strong practicality. The output shaft of the driving motor drives one of the first shaft rods to rotate, and the two first shaft rods rotate through gears. The first shaft rod drives the first connecting rod to rotate, the first connecting rod cooperates with the second connecting rod to rotate, the second connecting rod cooperates with the third connecting rod to rotate, and the third connecting rod drives the lifting frame to descend. The output shaft of the second motor drives the spiral dragon to rotate, and the spiral dragon drills a hole on the ground. Through this arrangement, the spiral dragon descends and the first connecting rod, the second connecting rod, and the third connecting rod cooperate to drive, thereby increasing the impact force of the spiral dragon in downward mining, so that the spiral dragon can adapt to the mining of hard positions on the ground;

[0023] (3) The well fluid enters the internal space of the oil pipe joint depending on the downhole pressure, and then enters the internal space of the transmission joint, and enters the well fluid storage space through the transmission joint. The output shaft of the screw pump drives the screw to rotate, the screw drives the flexible shaft to rotate, the flexible shaft drives the transmission joint to rotate, and the screw cooperates with the stator to transport the oil to the oil outlet chamber to complete the oil extraction. Through this setting, it has the characteristics of small displacement, strong adaptability to well conditions, compact structure, and can reduce one-time investment and maintenance costs. The outer casing has good passability in complex wellbores and eliminates eccentric wear, which meets the current rigid demand for cost reduction and efficiency improvement in oil fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a structural schematic diagram of a direct-drive ground screw pump oil production device of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the lifting support plate of the present invention;

[0027] Figure 3 is an installation view of the foundation support plate of the present invention;

[0028] Figure 4 is an installation view of the lifting frame of the present invention;

[0029] Figure 5 It is the internal structure diagram of the housing of the present invention;

[0030] Figure 6 It is a top view of the support frame of the present invention.

[0031] In the figure: 1, support frame; 2, first motor; 3, first sprocket shaft; 4, second sprocket shaft; 5, double-row sprocket; 6, first sprocket; 7, second sprocket; 8, upper sprocket; 9, support column; 10, lifting support plate; 11, channel steel; 12, connecting block; 13, guide frame; 14, guide wheel; 15, upper connecting plate; 151, driving motor; 16, first shaft rod; 17, first connecting rod; 18, second connecting rod; 19, third connecting rod; 20, lower connecting plate; 21, second shaft rod; 22, lifting Frame; 23, second motor; 24, spiral dragon; 25, screw pump; 26, oil outlet chamber; 27, housing; 28, screw; 29, stator; 30, flexible shaft; 31, transmission joint; 33, protector; 34, oil pipe joint; 35, shaft seat; 36, sprocket seat; 37, lower sprocket; 38, third shaft rod; 39, fourth shaft rod; 40, fifth shaft rod; 41, fixed block; 42, telescopic cylinder; 43, lifting strip; 44, lifting rod; 45, foundation support plate; 46, slider; 47, track. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-6 As shown, the present invention is a direct-drive ground screw pump oil production device, comprising two support frames 1, the two support frames 1 have the same structure, the two support frames 1 are welded to each other, a first motor 2 is installed on the top of the support frame 1, a double-row tooth sprocket 5 is installed on the end of the output shaft of the first motor 2, the double-row tooth sprocket 5 is connected to a first sprocket 6 and a second sprocket 7 through a chain transmission, the first sprocket 6 is sleeved on a first sprocket shaft 3, the second sprocket 7 is sleeved on a second sprocket shaft 4, and the first sprocket shaft 3 and the second sprocket shaft 4 are connected to each other. The ends are sleeved with upper sprockets 8, four sprocket seats 36 are symmetrically installed at the bottom of both sides of the support frame 1, and four lower sprockets 37 are symmetrically arranged on the four sprocket seats 36. The upper sprocket 8 and the lower sprocket 37 are connected by chain transmission. A connecting block 12 is installed on the chain between the upper sprocket 8 and the lower sprocket 37. The four connecting blocks 12 are respectively installed on two channel steels 11. The four connecting blocks 12 are respectively fixed to the positions near the two ends of the two channel steels 11, and a lifting support plate 10 is fixed between the two channel steels 11;

[0034] An upper connecting plate 15 is installed at the bottom of one of the lifting support plates 10, and two first shafts 16 are rotatably arranged on the upper connecting plate 15. Two meshing gears are sleeved on the same side of the two first shafts 16, and a second connecting rod 18 is rotatably connected to the third shaft 38. Four second connecting rods 18 are rotatably connected to two third shafts 38, and four second connecting rods 18 are rotatably connected to two fourth shafts 39. Third connecting rods 19 are rotatably installed at both ends of the fourth shaft 39, and one end of the third connecting rod 19 away from the fourth shaft 39 is rotatably connected to the second shaft 21. The four third connecting rods 19 are rotatably connected to both ends of the two second shafts 21 respectively, and the two second shafts 21 are installed on the lower connecting plate 20, and the lower connecting plate 20 is installed on the top of the lifting frame 22. A second motor 23 is installed on the lifting frame 22, and a spiral dragon 24 is connected to the output shaft of the second motor 23;

[0035] An oil outlet cavity 26 is installed on the upper surface of the other lifting support plate 10, a screw pump 25 is installed on the top of the oil outlet cavity 26, the output shaft of the screw pump 25 passes through the oil outlet cavity 26 and is connected to a screw 28, a stator 29 is arranged on the outside of the screw 28, the stator 29 is arranged in the inner cavity of the outer shell 27, and an oil pipe joint 34 is installed at the bottom of the outer shell 27.

[0036] Specifically, the support frame 1 is symmetrically mounted with support columns 9 on both sides, and the lifting support plate 10 is symmetrically mounted with two guide frames 13 on both sides. Three guide wheels 14 are rotatably mounted on the guide frames 13, and the three guide wheels 14 all contact the side walls of the support columns 9. Four second connecting rods 18 are rotatably mounted on both ends of the fifth shaft rod 40 in pairs, and the second connecting rod 18 is rotatably connected to the fourth shaft rod 39 at one end away from the third shaft rod 38. The first sprocket shaft 3 and the second sprocket shaft 4 are respectively connected to the shaft seat 35 at both ends, and the shaft seat 35 is fixed to the top of the support frame 1. The two first shaft rods 16 are rotatably connected with the first connecting rod 17 at both ends, and the first connecting rod 17 is rotatably connected to the third shaft rod 38 at one end away from the first shaft rod 16. The bottom of the screw 28 is connected to the flexible shaft 30, and the bottom of the flexible shaft 30 is connected to the transmission joint 31, which is a hollow structure. A protector 33 is installed on the outer wall of the transmission joint 31, and the bottom of the transmission joint 31 is connected to the oil pipe joint 34. Four sliders 46 are installed at the bottom of the two support frames 1, and two tracks 47 are arranged below the two support frames 1. The two support frames 1 slide on the two tracks 47 through the four sliders 46. Fixed blocks 41 are symmetrically installed on both sides of the two support frames 1, and two telescopic cylinders 42 are installed on the fixed blocks 41. Lifting bars 43 are installed at the ends of the piston rods of the telescopic cylinders 42. Lifting rods 44 are fixed at both ends of the bottom of the lifting bars 43. Four lifting rods 44 are installed on the upper surface of the foundation support plate 45. A driving motor 151 is installed on the lower surface of the upper connecting plate 15, and the output shaft of the driving motor 151 is connected to one of the first shafts 16.

[0037] See also Figure 1-6As shown, the working process of a direct-drive surface screw pump oil production device of this embodiment is as follows:

[0038] Step 1: Push the support frame 1 with the spiral dragon 24 along the track 47 to above the oil production position, the piston rods of the telescopic cylinders 42 on the two support frame 1 fixing blocks 41 are contracted, and then the lifting rods 44 are driven to descend through the lifting bars 43, and the lifting rods 44 drive the foundation support plate 45 to press downward on the ground to fix the support frame 1, and the output shaft of the first motor 2 on the support frame 1 with the spiral dragon 24 drives the double-row toothed sprocket 5 to rotate, and the double-row toothed sprocket 5 drives the first sprocket 6 and the second sprocket 7 to rotate through the chain, the first sprocket 6 drives the first sprocket shaft 3 to rotate, and the second sprocket 7 drives the second sprocket The shaft 4 rotates, the first sprocket shaft 3 and the second sprocket shaft 4 drive the upper sprocket 8 to rotate, the upper sprocket 8 cooperates with the lower sprocket 37 to drive the spiral dragon 24 to descend, and at the same time, the output shaft of the driving motor 151 drives one of the first shaft rods 16 to rotate, the two first shaft rods 16 rotate through gears, the first shaft rod 16 drives the first connecting rod 17 to rotate, the first connecting rod 17 cooperates with the second connecting rod 18 to rotate, the second connecting rod 18 cooperates with the third connecting rod 19 to rotate, the third connecting rod 19 drives the lifting frame 22 to descend, the output shaft of the second motor 23 drives the spiral dragon 24 to rotate, and the spiral dragon 24 drills a hole in the ground;

[0039] Step 2: After the drilling is completed, the telescopic cylinder 42 pushes the lifting bar 43 upwards through the piston rod, and the lifting bar 43 drives the foundation support plate 45 to rise. The foundation support plate 45 does not contact the ground, and the support frame 1 with the shell 27 is pushed along the track 47 to above the drilling position. The piston rods of the telescopic cylinders 42 on the two support frame 1 fixing blocks 41 shrink, and then drive the lifting rod 44 to descend through the lifting bar 43. The lifting rod 44 drives the foundation support plate 45 to press downward on the ground to fix the support frame 1. The output shaft of the first motor 2 on the support frame 1 with the shell 27 drives the double-row tooth sprocket 5 to rotate, and the double-row tooth sprocket 5 drives the first sprocket 6 and the second sprocket 7 to rotate through the chain. The first sprocket 6 drives the first sprocket shaft 3 to rotate, the second sprocket 7 drives the second sprocket shaft 4 to rotate, the first sprocket shaft 3 and the second sprocket shaft 4 drive the upper sprocket 8 to rotate, the upper sprocket 8 cooperates with the lower sprocket 37 to drive the outer shell 27 to descend, and then drives the oil pipe joint 34 to descend to the well fluid position, the well fluid enters the internal space of the oil pipe joint 34 depending on the downhole pressure, and then the well fluid enters the internal space of the transmission joint 31, and enters the well fluid storage space through the transmission joint 31, the output shaft of the screw pump 25 drives the screw 28 to rotate, the screw 28 drives the flexible shaft 30 to rotate, the flexible shaft 30 drives the transmission joint 31 to rotate, the screw 28 cooperates with the stator 29 to transport the oil to the oil outlet chamber 26, and the oil extraction is completed.

[0040] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An operating method of a direct-drive surface screw pump oil production device, characterized in that: The direct-drive surface screw pump oil production device comprises two support frames (1), the two support frames (1) have the same structure, the two support frames (1) are welded to each other, a first motor (2) is mounted on the top of the support frame (1), a double-row toothed sprocket (5) is mounted on the end of the output shaft of the first motor (2), the double-row toothed sprocket (5) is connected to a first sprocket (6) and a second sprocket (7) via a chain transmission, the first sprocket (6) is sleeved on a first sprocket shaft (3), the second sprocket (7) is sleeved on a second sprocket shaft (4), and both ends of the first sprocket shaft (3) and the second sprocket shaft (4) are connected to the first sprocket shaft (3) and the second sprocket shaft (4). Each of the upper sprockets (8) is sleeved thereon, four sprocket seats (36) are symmetrically mounted on the bottom of both sides of the support frame (1), four lower sprockets (37) are symmetrically mounted on the four sprocket seats (36), the upper sprockets (8) and the lower sprockets (37) are connected via a chain transmission, a connecting block (12) is mounted on the chain between the upper sprocket (8) and the lower sprocket (37), the four connecting blocks (12) are respectively mounted on two channel steels (11), the four connecting blocks (12) are respectively fixed to positions near both ends of the two channel steels (11), and a lifting support plate (10) is fixed between the two channel steels (11); An upper connecting plate (15) is installed at the bottom of one of the lifting support plates (10), two first shafts (16) are rotatably arranged on the upper connecting plate (15), two meshing gears are sleeved on the same side of the two first shafts (16), a second connecting rod (18) is rotatably connected to the third shaft (38), four second connecting rods (18) are rotatably connected to the two third shafts (38), and the four second connecting rods (18) are rotatably connected to the two fourth shafts (39), and the fourth shaft (39) is rotatably arranged at both ends. A third connecting rod (19) is provided, wherein one end of the third connecting rod (19) away from the fourth shaft rod (39) is rotatably connected to the second shaft rod (21), and the four third connecting rods (19) are rotatably connected to the two ends of the two second shaft rods (21), respectively, and the two second shaft rods (21) are mounted on a lower connecting plate (20), and the lower connecting plate (20) is mounted on the top of a lifting frame (22). A second motor (23) is mounted on the lifting frame (22), and the output shaft of the second motor (23) is connected to a spiral dragon (24); An oil outlet cavity (26) is installed on the upper surface of the other lifting support plate (10), a screw pump (25) is installed on the top of the oil outlet cavity (26), an output shaft of the screw pump (25) passes through the oil outlet cavity (26) and is connected to a screw (28), a stator (29) is arranged outside the screw (28), the stator (29) is arranged in the inner cavity of the outer shell (27), and an oil pipe joint (34) is installed at the bottom of the outer shell (27); Support columns (9) are symmetrically mounted on both sides of the support frame (1), and two guide frames (13) are symmetrically mounted on both sides of the lifting support plate (10). Three guide wheels (14) are rotatably mounted on the guide frames (13), and the three guide wheels (14) all contact the side walls of the support columns (9); The four second connecting rods (18) are rotatably mounted in pairs at two ends of a fifth shaft rod (40); one end of the second connecting rod (18) away from the third shaft rod (38) is rotatably connected to a fourth shaft rod (39); Both ends of the first sprocket shaft (3) and the second sprocket shaft (4) are respectively connected to shaft seats (35), and the shaft seats (35) are fixed to the top of the support frame (1); Both ends of the two first shaft rods (16) are rotatably connected to a first connecting rod (17); one end of the first connecting rod (17) away from the first shaft rod (16) is rotatably connected to a third shaft rod (38); The bottom of the screw rod (28) is connected to a flexible shaft (30), the bottom of the flexible shaft (30) is connected to a transmission joint (31), the transmission joint (31) is a hollow structure, a protector (33) is installed on the outer wall of the transmission joint (31), and the bottom of the transmission joint (31) is connected to an oil pipe joint (34); Four sliders (46) are installed at the bottom of the two support frames (1), two tracks (47) are arranged below the two support frames (1), and the two support frames (1) slide on the two tracks (47) via the four sliders (46); Fixed blocks (41) are symmetrically mounted on both sides of the two support frames (1), two telescopic cylinders (42) are mounted on the fixed blocks (41), lifting bars (43) are mounted on the ends of piston rods of the telescopic cylinders (42), lifting rods (44) are fixed at both ends of the bottom of the lifting bars (43), and the four lifting rods (44) are mounted on the upper surface of the foundation support plate (45); A driving motor (151) is mounted on the lower surface of the upper connecting plate (15), and an output shaft of the driving motor (151) is connected to one of the first shafts (16); The operation method of the direct-drive surface screw pump oil production device comprises the following steps: Step 1: The support frame (1) with the spiral dragon (24) is pushed along the track (47) to above the oil production position, the piston rods of the telescopic cylinders (42) on the fixing blocks (41) of the two support frames (1) are contracted, and then the lifting rods (44) are driven to descend through the lifting bars (43), and the lifting rods (44) drive the foundation support plate (45) to press downward on the ground to fix the support frame (1), and the output shaft of the first motor (2) on the support frame (1) with the spiral dragon (24) drives the double-row toothed sprocket (5) to rotate, and the double-row toothed sprocket (5) drives the first sprocket (6) and the second sprocket (7) to rotate through the chain, and the first sprocket (6) drives the first sprocket shaft (3) to rotate, and the second sprocket (7) drives the second sprocket The shaft (4) rotates, the first sprocket shaft (3) and the second sprocket shaft (4) drive the upper sprocket (8) to rotate, the upper sprocket (8) cooperates with the lower sprocket (37) to drive the spiral dragon (24) to descend, and at the same time, the output shaft of the driving motor (151) drives one of the first shaft rods (16) to rotate, the two first shaft rods (16) rotate in coordination through gears, the first shaft rod (16) drives the first connecting rod (17) to rotate, the first connecting rod (17) cooperates with the second connecting rod (18) to rotate, the second connecting rod (18) cooperates with the third connecting rod (19) to rotate, the third connecting rod (19) drives the lifting frame (22) to descend, the output shaft of the second motor (23) drives the spiral dragon (24) to rotate, and the spiral dragon (24) drills a hole in the ground; Step 2: After the drilling is completed, the telescopic cylinder (42) pushes the lifting bar (43) upwards through the piston rod, and the lifting bar (43) drives the foundation support plate (45) to rise. The foundation support plate (45) is not in contact with the ground. The support frame (1) with the shell (27) is pushed along the track (47) to above the drilling position. The piston rods of the telescopic cylinder (42) on the fixing blocks (41) of the two support frames (1) are retracted, and then the lifting rod (44) is driven to descend through the lifting bar (43). The lifting rod (44) drives the foundation support plate (45) to press downward on the ground to fix the support frame (1). The output shaft of the first motor (2) on the support frame (1) with the shell (27) drives the double-row tooth sprocket (5) to rotate. The double-row tooth sprocket (5) drives the first sprocket (6) and the second sprocket (7) to rotate through the chain. The first sprocket (6) drives the first sprocket shaft (3) to rotate, the second sprocket (7) drives the second sprocket shaft (4) to rotate, the first sprocket shaft (3) and the second sprocket shaft (4) drive the upper sprocket (8) to rotate, the upper sprocket (8) cooperates with the lower sprocket (37) to drive the housing (27) to descend, and then drives the oil pipe joint (34) to descend to the well fluid position, the well fluid enters the internal space of the oil pipe joint (34) due to the downhole pressure, and then the well fluid enters the internal space of the transmission joint (31), and enters the well fluid storage space through the transmission joint (31), the output shaft of the screw pump (25) drives the screw (28) to rotate, the screw (28) drives the flexible shaft (30) to rotate, the flexible shaft (30) drives the transmission joint (31) to rotate, the screw (28) cooperates with the stator (29) to transport the oil to the oil outlet chamber (26), and the oil extraction is completed.

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