Ground hydraulic drive lifting oil extraction deep-well pump and using method thereof

Abstract

The invention discloses a ground hydraulic drive lifting oil extraction deep-well pump which comprises a pump body pipe, a set of hydraulic force transmission channels are formed in the pipe wall of the pump body pipe in the axial direction of the pump body pipe, and the set of hydraulic force transmission channels are symmetrically arranged along the central axis of the pump body pipe; a communicating opening communicated with the interior of the pump body pipe is formed in the bottom of each hydraulic power transmission channel, and a hydraulic control combination is arranged on the inner wall of the pump body pipe to control opening and closing of the communicating openings; a driving lifting structure is arranged in the pump body pipe, an oil pumping opening is further formed in the bottom of the pump body pipe, and a fixed valve is arranged on the oil pumping opening. Compared with the prior art, the ground hydraulic drive lifting oil extraction deep-well pump has the advantages that eccentric wear of the sucker rod and the oil pipe is avoided, and the service life of the oil pipe can be prolonged by more than one time; driving the pressurizing working fluid to be not mixed with the formation output fluid; the pressurization working fluid can be recycled, the maintenance-free working time of the pressurization system can be prolonged, economic benefits are remarkable, and the method has great application value in deep well oil extraction and deep coal bed gas drainage.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum and natural gas drainage and oil production systems, and relates to a ground hydraulically driven lifting oil production deep well pump, and also relates to a method for using the deep well pump. Background Art

[0002] At present, the main artificial oil production and drainage lifting methods used in the field include beam pumping units, electric submersible pumps, screw pumps and jet pumps. In professional and technical books, there are also materials on hydraulic piston pumps, but this type of pump is not seen in non-flowing well drainage oil production wells in North America, Central Asia, the Middle East and my country. The ground hydraulically driven lifting oil production deep well pump is a new artificial oil production and drainage lifting method, which is similar to the hydraulic piston pump listed in the book. It overcomes the shortcomings of the existing technology, such as small pump head (≦2000 meters), low pump efficiency and short working cycle (less than 30 days).

[0003] The disclosed technologies related to the ground hydraulically driven lifting deep well oil pump, such as the invention patent with publication number CN118188642A and titled "A hydraulic push-pull actuator, a fluid reversing device and an oil production equipment", discloses "a hydraulic push-pull actuator, a fluid reversing device and an oil production equipment, which, under the action of an external mechanism, are placed in different positions according to a certain cycle cycle, so that the power fluid enters the upper chamber or the lower chamber of the hydraulic piston cylinder from the fluid inlet hole of the excitation rod, pushing the power piston downward or upward, and the power piston rod will also achieve the extension / retraction movement according to the same cycle cycle, and the push-pull reversing piston performs work to change the position of the reversing piston on the fluid reversing valve, thereby driving the power motor to reciprocate linearly, and driving the oil pump piston connected thereto to reciprocate, to achieve the purpose of oil production lifting." This patented technology overcomes the problem of eccentric wear of rod pumping units, extends the life of the oil pumping unit equipment, and reduces the energy consumption of the oil pumping unit equipment system. However, the driving boost working fluid is mixed with the formation output fluid after the boost driving is completed, and flows up to the ground through the boost chamber. The formation output fluid is highly corrosive and has a certain corrosive effect on the boost chamber. The boost fluid cannot be recycled. When working continuously, the boost working fluid must be continuously newly configured.

[0004] In view of the above problems, the present invention has developed a new ground hydraulically driven lifting oil production deep well pump. Summary of the invention

[0005] The purpose of the present invention is to provide a ground hydraulically driven lifting deep well oil production pump, which solves the problem of corrosion of the boosting chamber after the driving boosting working fluid and the formation production fluid are mixed in the ground hydraulically driven lifting deep well oil production pump in the prior art, and the problem that the boosting working fluid cannot be recycled.

[0006] Another object of the present invention is to provide a method for using the above-mentioned ground hydraulically driven lifting oil production deep well pump.

[0007] The technical solution adopted by the invention is a ground hydraulically driven lifting deep well oil production pump, including a pump body tube, a group of hydraulic power conduction channels are opened on the tube wall of the pump body tube along the axial direction of the pump body tube, and the group of hydraulic power conduction channels are symmetrically arranged along the central axis of the pump body tube; a connecting port connected to the inside of the pump body tube is arranged at the bottom of each hydraulic power conduction channel, and a hydraulic control combination is arranged on the inner wall of the pump body tube to control the opening and closing of the connecting port; a driving lifting structure is arranged inside the pump body tube, and an oil pumping port is also arranged at the bottom of the pump body tube, and a fixed valve is arranged on the oil pumping port.

[0008] The present invention is also characterized in that: The driven lifting structure includes an active lifting structure arranged in the pump body tube, an upper lifting structure and a lower lifting structure are arranged between the inner wall of the pump body tube and the active lifting structure, the upper lifting structure is arranged at the upper end of the pump body tube, and a pressure relief valve A is also arranged in the upper lifting structure, and the lower lifting structure is arranged at the lower end of the pump body tube, and a pressure relief valve B is also arranged in the lower lifting structure.

[0009] The number of the upper lifting structures and the number of the lower lifting structures are both one group, and one group of the upper lifting structures and one group of the lower lifting structures are both symmetrically arranged along the central axis of the active lifting structure.

[0010] The active lifting structure includes a piston cylinder arranged in the pump body tube, a main piston is arranged in the piston cylinder, a piston rod is arranged on the main piston, a channel is opened on the piston rod, and the piston cylinder 13 is connected to the outside through the channel.

[0011] The upper lifting structure comprises an upper driving piston cylinder arranged between the outer wall of the piston cylinder and the inner wall of the pump body tube, an upper driving piston is arranged in the upper driving piston cylinder, and an upper connecting rod is arranged on the upper driving piston.

[0012] The lower lifting structure comprises a lower driving piston cylinder 19 arranged between the outer wall of the piston cylinder and the inner wall of the pump body tube, a lower driving piston is arranged in the lower driving piston cylinder, and a lower connecting rod is arranged on the lower driving piston.

[0013] An upper fixing rod and a lower fixing rod are respectively arranged at the upper and lower ends of the piston rod, and the upper fixing rod and the lower fixing rod are respectively arranged vertically at the two ends of the piston rod, the upper connecting rod passes through the upper driving piston cylinder and is connected to the upper fixing rod, and the lower connecting rod passes through the lower driving piston cylinder and is connected to the lower fixing rod.

[0014] The pressure relief valve A is arranged on the side wall of the upper driving piston cylinder, and the pressure relief valve A controls the communication between the upper driving piston cylinder and the piston cylinder. The pressure relief valve B is arranged on the side wall of the lower driving piston cylinder, and the pressure relief valve B controls the communication between the lower driving piston cylinder and the piston cylinder.

[0015] The outer diameter of the pump tube is 102mm and the length of the piston cylinder is 5m; The distance from the end of the pump body pipe to the end of the upper driving piston cylinder is 1.5m, and the distance from the bottom of the pump body pipe end to the bottom of the lower driving piston cylinder is 1.5m.

[0016] The second technical solution adopted by the invention is a method for using a ground hydraulically driven lifting oil production deep well pump. The specific use process is as follows: connect the oil pipe and the pump body pipe through a conversion joint, and lower the deep well pump as a whole into the oil well; pump power fluid into the hydraulic power transmission channel through the ground high pressure pump, the power fluid reaches the hydraulic control combination, and enters the upper driving piston cylinder and the lower driving piston cylinder through the hydraulic power transmission channel and the connecting port. The high-pressure power fluid acts on the upper driving piston, driving the upper driving piston to move upward, and the power fluid in the lower driving piston cylinder is discharged to the piston cylinder through the pressure relief valve B, and the upper connecting rod moves upward synchronously, thereby driving the main piston to move upward. During the upward movement, the fixed valve opens, the oil pumping port opens, and the wellbore fluid enters the inner cavity of the piston cylinder and is lifted to the ground. When the upper driving piston reaches the top dead center, the hydraulic control combination controls the connecting port to be closed, the hydraulic power conduction channel to be closed, and the high-pressure power fluid reaches the hydraulic control combination, the connecting port to be opened, and the high-pressure power fluid enters the lower driving piston cylinder. The high-pressure power fluid acts on the lower driving piston to drive the lower driving piston to move downward, and the high-pressure power fluid in the upper driving piston cylinder is discharged through the pressure relief valve A, and the lower connecting rod connected to the lower driving piston moves downward synchronously, thereby driving the main piston to move downward. During the downward movement of the main piston, the fixed valve opens, and the liquid in the pump body enters the piston cylinder, and is lifted to the ground during the upward movement of the main piston.

[0017] The beneficial effects of the present invention are: (1) Compared with the walking beam pumping unit (98% market share) which is the most widely used pumping unit on site, the hydraulically driven lifting deep well pump of the present application is less prone to eccentric wear of the sucker rod and the oil pipe, as the piston rod is vertically provided with an upper fixed rod and a lower fixed rod, a group of upper connecting rods pass through the upper driving piston cylinder and are respectively connected to the two ends of the upper fixed rod, and a group of lower connecting rods pass through the lower driving piston cylinder and are respectively connected to the two ends of the lower fixed rod. The service life of the oil pipe can be extended by more than double.

[0018] (2) The surface hydraulically driven lifting deep well oil production pump of the present application has a driving booster working fluid (high-pressure power fluid) that does not mix with the formation production fluid, thereby reducing the corrosion of the formation production fluid to the booster chamber; the booster working fluid can be recycled, which can extend the maintenance-free working time of the booster system, and the hydraulic control combination uses a driving booster steering valve with a valve seat structure. Under a pressure of 15 MPa, the sealing life can reach more than 100,000 switches.

[0019] (3) The surface hydraulically driven lifting deep well oil production pump of the present application changes the mechanical mode of force transmission to hydraulic transmission, and the force transmission efficiency can be improved by 100%. It has significant economic benefits and has great application value in deep well oil production and deep coalbed methane drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the longitudinal section structure of the surface hydraulic driven lifting oil production deep well pump of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of a ground hydraulically driven lifting oil production deep well pump according to the present invention.

[0021] In the figure, 1. pump body tube, 2. hydraulic power transmission channel, 3. connecting port, 4. hydraulic control combination, 5. driving lifting structure, 6. oil extraction port, 7. fixed valve, 8. active lifting structure, 9. upper lifting structure, 10. lower lifting structure, 11. pressure relief valve A, 12. pressure relief valve B, 13. piston cylinder, 14. main piston, 15. piston rod, 16. upper driving piston cylinder, 17. upper driving piston, 18. upper connecting rod, 19. lower driving piston cylinder, 20. lower driving piston, 21. lower connecting rod, 22. upper fixed rod, 23. lower fixed rod. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The surface hydraulic driven lifting oil production deep well pump of the present invention has a structure as follows Figure 1 As shown, it includes a pump body tube 1, a group of hydraulic power conduction channels 2 are opened on the tube wall of the pump body tube 1 along the axial direction of the pump body tube 1, and a group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body tube 1. The hydraulic power conduction channels 2 are blind holes, and the power fluid is pumped into the hydraulic power conduction channels 2 through the ground high pressure pump. The power fluid can be active water of a sexual agent or a special hydraulic oil; each hydraulic power conduction channel 2 is provided with a connecting port 3 connected to the inside of the pump body tube 1 at the bottom, so that the hydraulic power conduction channel 2 can enter the upper driving piston cylinder 16 and the lower driving piston cylinder 19, and a hydraulic control assembly 4 is arranged on the inner wall of the pump body tube 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body tube 1, and an oil pumping port 6 is also arranged at the bottom of the pump body tube 1, and a fixed valve 7 is arranged on the oil pumping port 6. The hydraulic steering control assembly 4 is a four-way valve.

[0024] The driving lifting structure 5 includes an active lifting structure 8 arranged in the pump body tube 1, and an upper lifting structure 9 and a lower lifting structure 10 arranged between the inner wall of the pump body tube 1 and the active lifting structure 8. The upper lifting structure 9 is arranged at the upper end of the pump body tube 1, and a pressure relief valve A11 is also arranged in the upper lifting structure 9. The lower lifting structure 10 is arranged at the lower end of the pump body tube 1, and a pressure relief valve B12 is also arranged in the lower lifting structure 10. The number of the upper lifting structure 9 and the lower lifting structure 10 is a group, and a group of upper lifting structures 9 and a group of lower lifting structures 10 are symmetrically arranged along the central axis of the active lifting structure 8. The active lifting structure 8 includes a piston cylinder 13 arranged in the pump body tube 1, a main piston 14 is arranged in the piston cylinder 13, a piston rod 15 is arranged on the main piston 14, a channel is opened on the piston rod 15, and the piston cylinder 13 is connected to the outside through the channel. The upper lifting structure 9 includes an upper driving piston cylinder 16 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, an upper driving piston 17 is disposed in the upper driving piston cylinder 16, and an upper connecting rod 18 is disposed on the upper driving piston 17. The lower lifting structure 10 includes a lower driving piston cylinder 19 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, a lower driving piston 20 is disposed in the lower driving piston cylinder 19, and a lower connecting rod 21 is disposed on the lower driving piston 20. An upper fixed rod 22 and a lower fixed rod 23 are disposed at the upper and lower ends of the piston rod 15, respectively, and the upper fixed rod 22 and the lower fixed rod 23 are respectively vertically disposed at the two ends of the piston rod 15, the upper connecting rod 18 passes through the upper driving piston cylinder 16 and is connected to the upper fixed rod 22, and the lower connecting rod 21 passes through the lower driving piston cylinder 19 and is connected to the lower fixed rod 23. It can ensure that the deep well pump does not have eccentric wear of the sucker rod and the oil pipe.

[0025] In the present invention, the upper driving piston 17, the piston cylinder 13, and the power control assembly 4 form an upper pressurizing chamber, and the lower driving piston 20, the piston cylinder 13, and the power control assembly 4 form a lower pressurizing chamber. The upper driving piston 17, the lower driving piston 20, the pump body tube 1, and the piston cylinder 13 are in a dynamic sealing state, and the main piston 14 and the piston cylinder 13 are in a dynamic sealing state.

[0026] The pressure relief valve A11 is arranged on the side wall of the upper driving piston cylinder 16, and the pressure relief valve A11 controls the communication between the upper driving piston cylinder 16 and the piston cylinder 13. The pressure relief valve B12 is arranged on the side wall of the lower driving piston cylinder 19, and the pressure relief valve B12 controls the communication between the lower driving piston cylinder 19 and the piston cylinder 13. When the power fluid is pumped into the hydraulic power transmission channel 2 through the ground at high pressure, the power fluid reaches the hydraulic control assembly 4, and enters the upper driving piston cylinder 16 and the lower driving piston cylinder 19 through the hydraulic power transmission channel 2 and the connecting port 3. The upper driving piston cylinder 16 and the lower driving piston cylinder 19 are both pressurized areas, and the high-pressure power fluid acts on the upper driving piston 17, driving the upper driving piston 17 to move upward. The power fluid in the lower driving piston cylinder 19 is discharged to the piston cylinder 13 through the pressure relief valve B12, and the upper connecting rod 18 moves upward synchronously, thereby driving the main piston 14 to move upward. During the upward movement, the fixed valve 7 is opened, the pumping port 6 is opened, and the wellbore fluid enters the inner cavity of the piston cylinder 13 and is lifted to the ground.

[0027] The spatial relationship between the pump body tube 1 and the piston cylinder 13 and the upper drive piston cylinder 16 is as follows: Figure 2 In the figure, the spatial relationship between the pump body tube 1, the piston cylinder 13 and the main piston 14 is as follows: Figure 2 BB in; the spatial relationship between the pump tube 1, the hydraulic control assembly 4 and the piston cylinder 13 is as shown Figure 2 The spatial relationship between the CC in the pump body tube 1 and the lower connecting rod 21 and the piston cylinder 13 is as follows: Figure 2 As shown in DD.

[0028] The outer diameter of the pump tube 1 in the present application is 102 mm, and the length of the piston cylinder 13 is 5 m. The distance from the end of the pump tube 1 to the end of the upper driving piston cylinder 16 is 1.5 m, and the distance from the bottom of the pump tube 1 to the bottom of the lower driving piston cylinder 19 is 1.5 m.

[0029] The deep well pump of the present invention is further described below by way of embodiments.

[0030] Embodiment 1: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6.

[0031] Embodiment 2: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6.

[0032] The driving lifting structure 5 includes an active lifting structure 8 arranged in the pump body tube 1, and an upper lifting structure 9 and a lower lifting structure 10 are arranged between the inner wall of the pump body tube 1 and the active lifting structure 8. The upper lifting structure 9 is arranged at the upper end of the pump body tube 1, and a pressure relief valve A11 is also arranged in the upper lifting structure 9. The lower lifting structure 10 is arranged at the lower end of the pump body tube 1, and a pressure relief valve B12 is also arranged in the lower lifting structure 10.

[0033] Embodiment 3: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6.

[0034] The driving lifting structure 5 includes an active lifting structure 8 arranged in the pump body tube 1, and an upper lifting structure 9 and a lower lifting structure 10 are arranged between the inner wall of the pump body tube 1 and the active lifting structure 8. The upper lifting structure 9 is arranged at the upper end of the pump body tube 1, and a pressure relief valve A11 is also arranged in the upper lifting structure 9. The lower lifting structure 10 is arranged at the lower end of the pump body tube 1, and a pressure relief valve B12 is also arranged in the lower lifting structure 10.

[0035] The number of the upper lifting structures 9 and the number of the lower lifting structures 10 are both one group, and one group of the upper lifting structures 9 and one group of the lower lifting structures 10 are both symmetrically arranged along the central axis of the active lifting structure 8 .

[0036] Embodiment 4: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6.

[0037] The driving lifting structure 5 includes an active lifting structure 8 arranged in the pump body tube 1, and an upper lifting structure 9 and a lower lifting structure 10 are arranged between the inner wall of the pump body tube 1 and the active lifting structure 8. The upper lifting structure 9 is arranged at the upper end of the pump body tube 1, and a pressure relief valve A11 is also arranged in the upper lifting structure 9. The lower lifting structure 10 is arranged at the lower end of the pump body tube 1, and a pressure relief valve B12 is also arranged in the lower lifting structure 10.

[0038] The number of the upper lifting structures 9 and the number of the lower lifting structures 10 are both one group, and one group of the upper lifting structures 9 and one group of the lower lifting structures 10 are both symmetrically arranged along the central axis of the active lifting structure 8 .

[0039] The active lifting structure 8 includes a piston cylinder 13 disposed in the pump body tube 1, a main piston 14 is disposed in the piston cylinder 13, a piston rod 15 is disposed on the main piston 14, a channel is opened on the piston rod 15, and the piston cylinder 13 is connected to the outside through the channel. The upper lifting structure 9 includes an upper driving piston cylinder 16 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, an upper driving piston 17 is disposed in the upper driving piston cylinder 16, and an upper connecting rod 18 is disposed on the upper driving piston 17. The lower lifting structure 10 includes a lower driving piston cylinder 19 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, a lower driving piston 20 is disposed in the lower driving piston cylinder 19, and a lower connecting rod 21 is disposed on the lower driving piston 20.

[0040] Embodiment 5: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6.

[0041] The driving lifting structure 5 includes an active lifting structure 8 arranged in the pump body tube 1, and an upper lifting structure 9 and a lower lifting structure 10 are arranged between the inner wall of the pump body tube 1 and the active lifting structure 8. The upper lifting structure 9 is arranged at the upper end of the pump body tube 1, and a pressure relief valve A11 is also arranged in the upper lifting structure 9. The lower lifting structure 10 is arranged at the lower end of the pump body tube 1, and a pressure relief valve B12 is also arranged in the lower lifting structure 10.

[0042] The number of the upper lifting structures 9 and the number of the lower lifting structures 10 are both one group, and one group of the upper lifting structures 9 and one group of the lower lifting structures 10 are both symmetrically arranged along the central axis of the active lifting structure 8 .

[0043] The active lifting structure 8 includes a piston cylinder 13 disposed in the pump body tube 1, a main piston 14 is disposed in the piston cylinder 13, a piston rod 15 is disposed on the main piston 14, a channel is opened on the piston rod 15, and the piston cylinder 13 is connected to the outside through the channel. The upper lifting structure 9 includes an upper driving piston cylinder 16 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, an upper driving piston 17 is disposed in the upper driving piston cylinder 16, and an upper connecting rod 18 is disposed on the upper driving piston 17. The lower lifting structure 10 includes a lower driving piston cylinder 19 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, a lower driving piston 20 is disposed in the lower driving piston cylinder 19, and a lower connecting rod 21 is disposed on the lower driving piston 20.

[0044] An upper fixed rod 22 and a lower fixed rod 23 are respectively provided at the upper and lower ends of the piston rod 15. The upper fixed rod 22 and the lower fixed rod 23 are respectively vertically arranged at the two ends of the piston rod 15. The upper connecting rod 18 passes through the upper driving piston cylinder 16 and is connected to the upper fixed rod 22. The lower connecting rod 21 passes through the lower driving piston cylinder 19 and is connected to the lower fixed rod 23.

[0045] Embodiment 6: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6. The driving lifting structure 5 includes an active lifting structure 8 disposed in the pump body tube 1, an upper lifting structure 9 and a lower lifting structure 10 are disposed between the inner wall of the pump body tube 1 and the active lifting structure 8, the upper lifting structure 9 is disposed at the upper end of the pump body tube 1, and a pressure relief valve A11 is also disposed in the upper lifting structure 9, and the lower lifting structure 10 is disposed at the lower end of the pump body tube 1, and a pressure relief valve B12 is also disposed in the lower lifting structure 10. The number of the upper lifting structure 9 and the number of the lower lifting structure 10 are both one group, and one group of the upper lifting structure 9 and one group of the lower lifting structure 10 are symmetrically disposed along the central axis of the active lifting structure 8.

[0046] The active lifting structure 8 includes a piston cylinder 13 disposed in the pump body tube 1, a main piston 14 is disposed in the piston cylinder 13, a piston rod 15 is disposed on the main piston 14, a channel is opened on the piston rod 15, and the piston cylinder 13 is connected to the outside through the channel. The upper lifting structure 9 includes an upper driving piston cylinder 16 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, an upper driving piston 17 is disposed in the upper driving piston cylinder 16, and an upper connecting rod 18 is disposed on the upper driving piston 17. The lower lifting structure 10 includes a lower driving piston cylinder 19 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, a lower driving piston 20 is disposed in the lower driving piston cylinder 19, and a lower connecting rod 21 is disposed on the lower driving piston 20. An upper fixed rod 22 and a lower fixed rod 23 are respectively provided at the upper and lower ends of the piston rod 15. The upper fixed rod 22 and the lower fixed rod 23 are respectively vertically arranged at the two ends of the piston rod 15. The upper connecting rod 18 passes through the upper driving piston cylinder 16 and is connected to the upper fixed rod 22. The lower connecting rod 21 passes through the lower driving piston cylinder 19 and is connected to the lower fixed rod 23.

[0047] The pressure relief valve A11 is arranged on the side wall of the upper driving piston cylinder 16 , and controls the communication between the upper driving piston cylinder 16 and the piston cylinder 13 . The pressure relief valve B12 is arranged on the side wall of the lower driving piston cylinder 19 , and controls the communication between the lower driving piston cylinder 19 and the piston cylinder 13 .

[0048] Embodiment 7: A ground hydraulically driven lifting deep well oil production pump comprises a pump body pipe 1, a group of hydraulic power conduction channels 2 are opened on the pipe wall of the pump body pipe 1 along the axial direction of the pump body pipe 1, and the group of hydraulic power conduction channels 2 are symmetrically arranged along the central axis of the pump body pipe 1; a connecting port 3 connected to the inside of the pump body pipe 1 is arranged at the bottom of each hydraulic power conduction channel 2, and a hydraulic control combination 4 is arranged on the inner wall of the pump body pipe 1 to control the opening and closing of the connecting port 3; a driving lifting structure 5 is arranged inside the pump body pipe 1, and an oil pumping port 6 is also arranged at the bottom of the pump body pipe 1, and a fixed valve 7 is arranged on the oil pumping port 6. The driving lifting structure 5 includes an active lifting structure 8 disposed in the pump body tube 1, an upper lifting structure 9 and a lower lifting structure 10 are disposed between the inner wall of the pump body tube 1 and the active lifting structure 8, the upper lifting structure 9 is disposed at the upper end of the pump body tube 1, and a pressure relief valve A11 is also disposed in the upper lifting structure 9, and the lower lifting structure 10 is disposed at the lower end of the pump body tube 1, and a pressure relief valve B12 is also disposed in the lower lifting structure 10. The number of the upper lifting structure 9 and the number of the lower lifting structure 10 are both one group, and one group of the upper lifting structure 9 and one group of the lower lifting structure 10 are symmetrically disposed along the central axis of the active lifting structure 8.

[0049] The active lifting structure 8 includes a piston cylinder 13 disposed in the pump body tube 1, a main piston 14 is disposed in the piston cylinder 13, a piston rod 15 is disposed on the main piston 14, a channel is opened on the piston rod 15, and the piston cylinder 13 is connected to the outside through the channel. The upper lifting structure 9 includes an upper driving piston cylinder 16 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, an upper driving piston 17 is disposed in the upper driving piston cylinder 16, and an upper connecting rod 18 is disposed on the upper driving piston 17. The lower lifting structure 10 includes a lower driving piston cylinder 19 disposed between the outer wall of the piston cylinder 13 and the inner wall of the pump body tube 1, a lower driving piston 20 is disposed in the lower driving piston cylinder 19, and a lower connecting rod 21 is disposed on the lower driving piston 20. An upper fixed rod 22 and a lower fixed rod 23 are respectively provided at the upper and lower ends of the piston rod 15. The upper fixed rod 22 and the lower fixed rod 23 are respectively vertically arranged at the two ends of the piston rod 15. The upper connecting rod 18 passes through the upper driving piston cylinder 16 and is connected to the upper fixed rod 22. The lower connecting rod 21 passes through the lower driving piston cylinder 19 and is connected to the lower fixed rod 23.

[0050] The pressure relief valve A11 is arranged on the side wall of the upper driving piston cylinder 16 , and controls the communication between the upper driving piston cylinder 16 and the piston cylinder 13 . The pressure relief valve B12 is arranged on the side wall of the lower driving piston cylinder 19 , and controls the communication between the lower driving piston cylinder 19 and the piston cylinder 13 .

[0051] The outer diameter of the pump body tube 1 is 102mm, and the length of the piston cylinder 13 is 5m; the distance from the end of the pump body tube 1 to the end of the upper driving piston cylinder 16 is 1.5m, and the distance from the bottom of the pump body tube 1 to the bottom of the lower driving piston cylinder 19 is 1.5m.

[0052] The use process of the deep well pump of the present invention is as follows: power fluid is pumped into the hydraulic power transmission channel 2 through the ground high pressure, the power fluid reaches the hydraulic control assembly 4, and enters the upper driving piston cylinder 16 and the lower driving piston cylinder 19 through the hydraulic power transmission channel 2 and the connecting port 3. The upper driving piston cylinder 16 and the lower driving piston cylinder 19 are both pressurized areas. The high-pressure power fluid acts on the upper driving piston 17 to drive the upper driving piston 17 to move upward. The power fluid in the lower driving piston cylinder 19 is discharged to the piston cylinder 13 through the pressure relief valve B12, and the upper connecting rod 18 moves upward synchronously, thereby driving the main piston 14 to move upward. During the upward movement, the fixed valve 7 is opened, the oil pumping port 6 is opened, and the wellbore fluid enters the inner cavity of the piston cylinder 13 and is lifted to the ground. When the upper driving piston 17 reaches the top dead center, the hydraulic control combination 4 controls the connecting port 3 to be closed, the hydraulic power conduction channel 2 to be closed, and the high-pressure power fluid reaches the hydraulic control combination 4, the connecting port 3 is opened, and the high-pressure power fluid enters the lower driving piston cylinder 19, and the high-pressure power fluid acts on the lower driving piston 20, driving the lower driving piston 20 to move downward, and the high-pressure power fluid in the upper driving piston cylinder 16 is discharged through the pressure relief valve A11, and the lower connecting rod 21 connected to the lower driving piston 20 moves downward synchronously, thereby driving the main piston 14 to move downward. During the downward movement of the main piston 14, the fixed valve 7 is opened, and the liquid in the pump body enters the piston cylinder 13, and is lifted to the ground during the upward movement of the main piston 14.

[0053] The power fluid in the present invention can be active water with a certain amount of active agent added, or it can be special hydraulic oil, which is injected continuously 24 hours a day through a ground booster pump and controlled by a power control assembly 4 to accurately determine the transition between the main piston 14 reaching the top dead center and the lower drive piston 20 reaching the bottom dead center, and synchronously open and close the upper and lower drive pressure relief valves A11 and B12 to drive the main piston 14 to reciprocate.

[0054] The driving boost working fluid is pumped into or out of the symmetrical boosting channels (upper driving piston cylinder 16 and lower driving piston cylinder 19) on both sides of the pump body, while the formation produced fluid is discharged through the channel on the piston rod 15 without mixing with the formation produced fluid; the boost working fluid is recycled to avoid corrosion of the boosting chamber by the formation fluid, greatly extending the maintenance-free working time of the boosting system.

Claims

1. A ground hydraulically driven lifting oil production deep well pump, characterized in that: The invention comprises a pump body tube (1), wherein a group of hydraulic power conduction channels (2) are opened on the tube wall of the pump body tube (1) along the axial direction of the pump body tube (1), and the group of hydraulic power conduction channels (2) are symmetrically arranged along the central axis of the pump body tube (1); a connecting port (3) communicating with the inside of the pump body tube (1) is arranged at the bottom of each hydraulic power conduction channel (2), and a hydraulic control assembly (4) is arranged on the inner wall of the pump body tube (1) to control the opening and closing of the connecting port (3); a driving lifting structure (5) is arranged inside the pump body tube (1), and an oil extraction port (6) is also arranged at the bottom of the pump body tube (1), and a fixed valve (7) is arranged on the oil extraction port (6).

2. The surface hydraulically driven lifting oil production deep well pump according to claim 1, characterized in that: The driving lifting structure (5) comprises an active lifting structure (8) arranged in the pump body tube (1), an upper lifting structure (9) and a lower lifting structure (10) are arranged between the inner wall of the pump body tube (1) and the active lifting structure (8), the upper lifting structure (9) is arranged at the upper end of the pump body tube (1), and a pressure relief valve A (11) is also arranged in the upper lifting structure (9), and the lower lifting structure (10) is arranged at the lower end of the pump body tube (1), and a pressure relief valve B (12) is also arranged in the lower lifting structure (10).

3. The surface hydraulically driven lifting oil production deep well pump according to claim 2 is characterized in that: The number of the upper lifting structures (9) and the number of the lower lifting structures (10) are both one group, and one group of the upper lifting structures (9) and one group of the lower lifting structures (10) are both symmetrically arranged along the central axis of the active lifting structure (8).

4. The surface hydraulically driven lifting oil production deep well pump according to claim 3 is characterized in that: The active lifting structure (8) comprises a piston cylinder (13) arranged in a pump body tube (1), a main piston (14) being arranged in the piston cylinder (13), a piston rod (15) being arranged on the main piston (14), a channel being opened on the piston rod (15), and the piston cylinder (13) is connected to the outside through the channel.

5. The surface hydraulically driven lifting oil production deep well pump according to claim 4, characterized in that: The upper lifting structure (9) comprises an upper driving piston cylinder (16) arranged between the outer wall of the piston cylinder (13) and the inner wall of the pump body tube (1), an upper driving piston (17) being arranged in the upper driving piston cylinder (16), and an upper connecting rod (18) being arranged on the upper driving piston (17).

6. The surface hydraulically driven lifting oil production deep well pump according to claim 5, characterized in that: The lower lifting structure (10) comprises a lower driving piston cylinder (19) arranged between the outer wall of the piston cylinder (13) and the inner wall of the pump body tube (1), a lower driving piston (20) being arranged in the lower driving piston cylinder (19), and a lower connecting rod (21) being arranged on the lower driving piston (20).

7. The surface hydraulically driven lifting oil production deep well pump according to claim 6, characterized in that: An upper fixing rod (22) and a lower fixing rod (23) are respectively arranged at the upper and lower ends of the piston rod (15); the upper fixing rod (22) and the lower fixing rod (23) are respectively arranged vertically at the two ends of the piston rod (15); the upper connecting rod (18) passes through the upper driving piston cylinder (16) and is connected to the upper fixing rod (22); the lower connecting rod (21) passes through the lower driving piston cylinder (19) and is connected to the lower fixing rod (23).

8. The surface hydraulically driven lifting oil production deep well pump according to claim 7, characterized in that: The pressure relief valve A (11) is arranged on the side wall of the upper driving piston cylinder (16), and the pressure relief valve A (11) controls the communication between the upper driving piston cylinder (16) and the piston cylinder (13). The pressure relief valve B (12) is arranged on the side wall of the lower driving piston cylinder (19), and the pressure relief valve B (12) controls the communication between the lower driving piston cylinder (19) and the piston cylinder (13).

9. The surface hydraulically driven lifting oil production deep well pump according to any one of claims 1 to 8, characterized in that: The outer diameter of the pump body tube (1) is 102 mm, and the length of the piston cylinder (13) is 5 m; the distance from the end of the pump body tube (1) to the end of the upper driving piston cylinder (16) is 1.5 m, and the distance from the bottom of the pump body tube (1) to the bottom of the lower driving piston cylinder (19) is 1.5 m.

10. The method for using the ground hydraulically driven lifting oil production deep well pump is characterized in that: The ground hydraulically driven lifting oil production deep well pump as claimed in claim 9 is used in a specific manner as follows: the oil pipe is connected to the pump body pipe (1) through a conversion joint, and the deep well pump is lowered into the oil well as a whole; power fluid is pumped into the hydraulic power transmission channel (2) through the ground, and the power fluid reaches the hydraulic control assembly (4), and enters the upper driving piston cylinder (16) and the lower driving piston cylinder (19) through the hydraulic power transmission channel (2) and the connecting port (3). The power fluid acts on the upper driving piston (17), driving the upper driving piston (17) to move upward, and the power fluid in the lower driving piston cylinder (19) is discharged to the piston cylinder (13) through the pressure relief valve B (12), and the upper connecting rod (18) moves upward synchronously, thereby driving the main piston (14) to move upward. During the upward movement, the fixed valve (7) is opened, the oil pumping port (6) is opened, and the wellbore fluid enters the piston cylinder (13). ) inner cavity and is lifted to the ground. When the upper driving piston (17) reaches the top dead center, the hydraulic control assembly (4) controls the connecting port (3) to be closed, and the hydraulic power transmission channel (2) is closed. When the power fluid reaches the hydraulic control assembly (4), the connecting port (3) is opened, and the power fluid enters the lower driving piston cylinder (19). The high-pressure power fluid acts on the lower driving piston (20), driving the lower driving piston (20) to move downward. The power fluid in the upper driving piston cylinder (16) is discharged through the pressure relief valve A (11), and the lower connecting rod (21) connected to the lower driving piston (20) moves downward synchronously, thereby driving the main piston (14) to move downward. During the downward movement of the main piston (14), the fixed valve (7) opens, and the liquid in the pump body enters the piston cylinder (13). When the main piston (14) moves upward, it is lifted to the ground and discharged through the channel in the piston rod (15).

Images