A deep well pressure gauge for oil exploration

Abstract

The application discloses a deep well pressure gauge for oil exploitation, and relates to the technical field of oil well detection, which comprises a rotating head in the shape of a cone rotationally connected to the bottom end of a drag cylinder, liquid outlet holes communicated with the inner cavity of the drag cylinder being formed around the drag cylinder, a plurality of liquid inlet holes communicated with the inner cavity of the rotating head being equidistantly formed along the axis of the rotating head, a servo motor fixedly connected to the inner cavity of a mounting box, the bottom cross section of the mounting box being in the shape of a cone, a connecting shaft fixedly connected to the bottom end of the servo motor through a driving shaft, a round corner formed on the outer edge of the bottom end of the driving shaft, and a sealing ring rotationally connected to the bottom end of the mounting box and fixed to the outer wall of the driving shaft. The mounting box, the servo motor, the driving shaft, the connecting shaft and the fin are arranged in the drag cylinder, the servo motor drives the connecting shaft to rotate through the driving shaft, the connecting shaft drives the fin to rotate, and the fin discharges the solidified oil from the drag cylinder, so that the detection of the pressure gauge is not affected by the solidified oil.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of oil well detection, and particularly relates to a deep well pressure gauge for oil exploitation. BACKGROUND

[0002] A well is a hole drilled into the ground by drilling technology, which is used to extract oil and natural gas from underground reservoirs. Oil wells are not only channels for oil and natural gas to flow from the ground to the surface, but also used for monitoring reservoir dynamics, injecting fluids to maintain reservoir pressure, etc.

[0003] In the prior art, the oil at the bottom of the oil well is often detected for pressure change by using a pressure gauge. The pressure gauge is installed in a tow cylinder, and then the pressure gauge is transported to the bottom of the oil well in a manner that a steel cable suspends the tow cylinder. The oil enters the tow cylinder and contacts the elastic element of the pressure gauge, so that the effect of detecting the oil pressure is achieved.

[0004] However, different sedimentary environments and geological structures of the oil well can form crude oil with different viscosities. When the oil in the oil well to be monitored has a large viscosity, the viscous crude oil in the oil well will be in a static state in the tow cylinder. After a long time, the viscous crude oil in the tow cylinder is prone to coagulation, thereby isolating the pressure gauge from the viscous crude oil in the oil well, so that the pressure data in the oil well cannot be accurately grasped by the workers. SUMMARY

[0005] The purpose of the present application is to provide a deep well pressure gauge for oil exploitation, so as to solve the technical problem that the pressure gauge is isolated from the viscous crude oil in the oil well due to the coagulation of the oil with a large viscosity in the tow cylinder in the prior art.

[0006] The technical problem solved by the present application can be solved by the following technical scheme:

[0007] A deep well pressure gauge for oil exploitation comprises:

[0008] A tow cylinder, a pressure gauge is fixedly connected to the inner wall of the tow cylinder through a liquid collecting box, a rotating head in a conical shape is rotationally connected to the bottom end of the tow cylinder, a plurality of liquid outlet holes in communication with the inner cavity of the tow cylinder are formed in the periphery of the tow cylinder, an elastic element is fixedly connected to the bottom end of the pressure gauge, a plurality of liquid inlet holes in communication with the inner cavity of the rotating head are equidistantly formed along the axis of the rotating head;

[0009] An installation box, the installation box is fixedly connected to the inner wall of the tow cylinder through a connecting plate at both ends, a servo motor is fixedly connected to the inner cavity of the installation box, the bottom cross section of the installation box is in a conical shape, a connecting shaft is fixedly connected to the bottom end of the servo motor through a drive shaft, a round corner is formed in the outer edge of the bottom end of the drive shaft, a sealing ring is fixedly connected to the outer wall of the drive shaft in rotation with the bottom end of the installation box, and the liquid outlet hole is located between the connecting plate and the elastic element;

[0010] The wing leaf is fixedly connected with the outer wall of the connecting shaft, and the wing leaf is rotatably connected with the inner wall of the rotating head.

[0011] As a further scheme of the present application, the rotating seat is fixedly connected to the top end of the rotating head, the rotating groove is formed in the bottom of the drag cylinder, the rotating seat is rotatably connected with the inner wall of the rotating groove, and is clamped and connected with the inner wall of the rotating groove.

[0012] As a further scheme of the present application, the pressure gauge is fixedly connected with the conveying line penetrating through the top of the drag cylinder, the protective tube is sleeved and connected with the outer wall of the conveying line, the bottom end of the protective tube is fixedly connected with the drag cylinder, and the axis of the protective tube is coincident with the axis of the liquid collecting tank.

[0013] As a further scheme of the present application, the protective tube is externally provided with an extension tube, a plurality of liquid passing holes are formed in the top of the drag cylinder along the axis, the bottom end of the extension tube is fixedly connected with the drag cylinder, and the extension tube is communicated with the inner cavity of the liquid collecting tank through the liquid passing holes.

[0014] As a further scheme of the present application, the inner wall of the liquid collecting tank is fixedly connected with a plurality of controllers, the bottom end of the controller is fixedly connected with the nozzle penetrating through the bottom of the liquid collecting tank, and the nozzle is communicated with the inner cavity of the drag cylinder.

[0015] As a further scheme of the present application, the cross section of the connecting plate at the upper and lower ends is triangular.

[0016] As a further scheme of the present application, the outer wall of the drag cylinder is fixedly connected with a plurality of abutting seats around, the inner part of the abutting seat is provided with a sliding hole, the inner wall of the sliding hole is fixedly connected with a spring through a fixing ring, the side end of the spring is fixedly connected with a sliding column, the sliding column is slidably connected with the inner wall of the sliding hole, and the side end of the sliding column is fixedly connected with an abutting plate in the shape of a circular arc.

[0017] As a further scheme of the present application, the outlet end of the sliding hole is located at the bottom of the abutting seat, the cross section of the sliding hole is in the shape of a circular arc, the fixing ring is in the shape of a circular ring, the side end of the sliding column is fixedly connected with a steel wire rope in the shape of a line, the steel wire rope penetrates through the spring and the fixing ring in sequence, and the bottom end of the steel wire rope is fixedly connected with a control ball in the shape of a sphere.

[0018] As a further scheme of the present application, the inner cavity of the rotating head is in the shape of a circular cone.

[0019] The present application has the following beneficial effects:

[0020] 1. By arranging the mounting box, the servo motor, the driving shaft, the connecting shaft and the wing leaf in the drag cylinder, the servo motor drives the connecting shaft to rotate through the driving shaft, the connecting shaft drives the wing leaf to rotate, and the wing leaf discharges the solidified petroleum from the drag cylinder, thereby avoiding the influence of the solidified petroleum on the detection of the pressure gauge.

[0021] 2. The conical shape of the rotating head can reduce the resistance of the oil to the tow drum. The servo motor drives the connecting shaft to rotate through the drive shaft, and the connecting shaft drives the rotating head to rotate. The rotating head further reduces the resistance of the oil, thus allowing the tow drum to be brought into the oil more effectively.

[0022] 3. The rounded corners of the drive shaft can better guide the oil flow and avoid the resistance of the drive shaft to the oil. The sealing ring of the drive shaft rotates along the bottom of the mounting box. The curvature of the sealing ring is equal to the curvature of the bottom of the mounting box, which can guide the oil flow and avoid the phenomenon of oil impacting the mounting box when flowing along the surface of the mounting box. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a right view of the overall structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 Overall structural AA section view;

[0026] Figure 4 For the present invention Figure 2 Overall structural BB section view;

[0027] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point C;

[0028] Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the structure at point D;

[0029] Figure 7 For the present invention Figure 3 Enlarged schematic diagram of the structure at point E;

[0030] Figure 8 For the present invention Figure 3 Enlarged schematic diagram of the structure at point F;

[0031] Figure 9 This is a schematic diagram of the rotating head structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the connecting plate structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the sealing ring structure of the present invention.

[0034] In the diagram: 1. Trailer; 2. Liquid outlet; 3. Rotating head; 4. Liquid inlet; 5. Control ball; 6. Steel wire rope; 7. Support plate; 8. Sliding column; 9. Support seat; 10. Extension tube; 11. Protective tube; 12. Conveyor line; 13. Connecting plate; 14. Connecting shaft; 15. Blade; 16. Sliding hole; 17. Mounting box; 18. Liquid passage hole; 19. Liquid collection tank; 20. Controller; 21. Nozzle; 22. Pressure gauge; 23. Elastic element; 24. Rotating seat; 25. Rotating groove; 26. Spring; 27. Fixing ring; 28. Servo motor; 29. ​​Drive shaft; 30. Sealing ring; 31. Rounded corner. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-11 As shown, a deep well pressure gauge for oil exploration includes: a tow cylinder 1, a mounting box 17, and blades 15. A pressure gauge 22 is fixedly connected to the inner wall of the tow cylinder 1 via a fluid collection box 19. A conical rotating head 3 is rotatably connected to the bottom end of the tow cylinder 1. Fluid outlet holes 2 communicating with the inner cavity of the tow cylinder 1 are respectively opened around the tow cylinder 1. An elastic element 23 is fixedly connected to the bottom end of the pressure gauge 22. Several fluid inlet holes 4 communicating with the inner cavity of the rotating head 3 are equidistantly opened along the axis. The two ends of the mounting box 17 are fixedly connected to the inner wall of the tow cylinder 1 via connecting plates 13. A servo motor 28 is fixedly connected to the inner cavity of the mounting box 17. The bottom cross-section of the mounting box 17 is conical. A connecting shaft 14 is fixedly connected to the bottom end of the servo motor 28 via a drive shaft 29. A rounded corner 31 is opened on the outer edge of the bottom end of the drive shaft 29. A sealing ring 30 rotatably connected to the bottom end of the mounting box 17 is fixed to the outer wall of the drive shaft 29. The outlet hole 2 is located between the connecting plate 13 and the elastic element 23. The fin 15 is fixedly connected to the outer wall of the connecting shaft 14 and rotatably connected to the inner wall of the rotating head 3. The pressure gauge 22 is fixed inside the tow cylinder 1. Then, the tow cylinder 1 is suspended vertically downward by a steel cable and placed in the oil well. When the tow cylinder 1 moves vertically downward, the rotating head 3 first contacts the oil in the oil well. In order to reduce the resistance of the oil to the tow cylinder 1, the rotating head 3 is set in a conical shape. The rotating head 3 can reduce the resistance of the oil to the tow cylinder 1. In order to further place the tow cylinder 1 better in the oil, the servo motor 28 runs and drives the drive shaft 29 to rotate. The drive shaft 29 drives the connecting shaft 14 to rotate, and the connecting shaft 14 drives the rotating head 3 to rotate. The rotating head 3 can be better inserted into the oil, further reducing the resistance of the oil to the tow cylinder 1.

[0037] When the drag cylinder 1 is placed at the bottom of the oil well, the drag cylinder 1 is completely immersed in the oil, at this time, the rotating head 3 stops rotating, the oil enters the inner cavity of the rotating head 3 from the liquid inlet hole 4, then the oil enters the inner cavity of the drag cylinder 1 from the inner cavity of the rotating head 3, so that the inner cavity of the drag cylinder 1 is filled with oil, the pressure of the oil is transmitted to the elastic element 23, the elastic element 23 is deformed under the pressure of the oil, the deformed elastic element 23 transmits the pressure of the oil to the pressure gauge 22, the pressure gauge 22 analyzes and transmits the pressure of the oil, thereby realizing the effect of detecting the pressure of the oil. When the viscosity of the oil is large, the oil in the inner cavity of the drag cylinder 1 will coagulate and solidify, at this time, the servo motor 28 operates, the servo motor 28 drives the drive shaft 29 to rotate, the drive shaft 29 drives the connecting shaft 14 to rotate, the connecting shaft 14 drives the fin 15 to rotate, the fin 15 transports the oil in the inner cavity of the rotating head 3 and the inner cavity of the drag cylinder 1 upward, the oil flows out from the liquid outlet hole 2, the oil outside the rotating head 3 enters the inner cavity of the rotating head 3 from the liquid inlet hole 4, thereby realizing the effect of replacing the oil, at the same time, the fin 15 realizes the effect of stirring and transporting the oil, avoiding the phenomenon of coagulation and solidification of the oil in the inner cavity of the drag cylinder 1, thereby affecting the effect of the pressure gauge 22 detecting the pressure of the oil.

[0038] The servo motor 28 is installed in the installation box 17, the installation box 17 is fixed in the drag cylinder 1 through the connecting plate 13, because the oil pressure at the bottom of the oil well is large, it will cause damage to the installation box 17, the installation box 17 can protect the servo motor 28, avoid direct contact between the oil and the installation box 17, thereby ensuring the normal operation of the servo motor 28, wherein when the servo motor 28 controls the drive shaft 29 to rotate, the drag cylinder 1 provides support for the installation box 17 through the connecting plate 13, thereby avoiding the phenomenon of self-rotation of the servo motor 28.

[0039] When the oil flows upward from the inner cavity of the rotating head 3, the round corner 31 opened on the drive shaft 29 can better guide the flow of the oil, avoiding the influence of the resistance of the oil on the drive shaft 29, wherein when the drive shaft 29 rotates, the drive shaft 29 will drive the sealing ring 30 to rotate, the sealing ring 30 rotates along the bottom end of the installation box 17, the curvature of the sealing ring 30 is equal to the curvature of the bottom of the installation box 17, thereby guiding the flow of the oil, avoiding the phenomenon of impacting the installation box 17 when the oil flows along the surface of the installation box 17, thereby reducing the vibration generated when the oil flows along the surface of the installation box 17, because the oil in the oil well has the characteristics of high temperature and containing sulfide substances, the sealing ring 30 can seal the gap between the installation box 17 and the drive shaft 29, avoiding the oil entering the inner cavity of the installation box 17 from the gap, at the same time, the sealing ring 30 can be made of corrosion-resistant alloy, which can avoid the phenomenon of wear of the oil high temperature and sulfide substances.

[0040] In some embodiments, the rotating head 3 is fixedly connected with a rotating seat 24 at the top end, the bottom of the drag cylinder 1 is provided with a rotating groove 25, the rotating seat 24 is rotatably connected with the inner wall of the rotating groove 25, and is clampedly connected with the inner wall of the rotating groove 25. When the rotating head 3 rotates, the rotating head 3 drives the rotating seat 24 to rotate along the inner wall of the rotating groove 25. The clamped connection between the rotating seat 24 and the inner wall of the rotating groove 25 provides limiting support for the rotating head 3.

[0041] In some embodiments, the pressure gauge 22 is fixedly connected with a conveying line 12 penetrating through the top of the drag cylinder 1 at the top end, the conveying line 12 is sleeved with a protective tube 11 at the outer wall, the bottom end of the protective tube 11 is fixedly connected with the drag cylinder 1, and the axis of the protective tube 11 coincides with the axis of the liquid collecting tank 19. When the pressure gauge 22 transmits the detection data, in order to avoid the interference of the oil well on the signal, the pressure gauge 22 transmits the detection data through the conveying line 12, and the conveying line 12 transmits the detection data to the client, thereby facilitating the collection of the detection data by the staff. The inner wall of the protective tube 11 and the conveying line 12 are not in contact, the protective tube 11 can protect the conveying line 12, avoid the influence of the magnetic field of the oil well on the data transmission of the conveying line 12, and at the same time, the protective tube 11 can provide a waterproof sealing effect for the conveying line 12.

[0042] In some embodiments, the protective tube 11 is provided with an extension tube 10 outside, a plurality of liquid passing holes 18 are formed along the axis at the top of the drag cylinder 1, the bottom end of the extension tube 10 is fixedly connected with the drag cylinder 1, the extension tube 10 is in communication with the inner cavity of the liquid collecting tank 19 through the liquid passing holes 18, a plurality of controllers 20 are fixedly connected with the inner wall of the liquid collecting tank 19, and the bottom end of each controller 20 is fixedly connected with a nozzle 21 penetrating through the bottom of the liquid collecting tank 19. The nozzle 21 is in communication with the inner cavity of the drag cylinder 1. For the oil with high viscosity in the inner cavity of the drag cylinder 1, the staff can introduce the viscosity reducer with low temperature into the inner cavity of the extension tube 10, the viscosity reducer flows vertically downward along the inner cavity of the extension tube 10, and then the viscosity reducer enters the inner cavity of the liquid collecting tank 19 through the liquid passing holes 18. The liquid collecting tank 19 is fixedly connected with the inner wall of the drag cylinder 1 and the outer wall of the pressure gauge 22, respectively. The viscosity reducer can absorb the heat of the drag cylinder 1 and the heat of the pressure gauge 22, thereby achieving the effect of cooling the pressure gauge 22, and avoiding the influence of the high temperature of the pressure gauge 22 on the service life of the pressure gauge 22.

[0043] When the viscosity reducer fills the inner cavity of the liquid collecting tank 19, the controller 20 operates, the controller 20 introduces the viscosity reducer into the inner cavity of the drag cylinder 1 through the nozzle 21, the viscosity reducer combines with the oil, and the viscosity reducer can reduce the viscosity of the oil, thereby avoiding the phenomenon of solidification of the oil, which affects the detection effect of the pressure gauge 22.

[0044] After the controller 20 passes the viscosity reducer into the oil in the inner cavity of the mop barrel 1, the controller 20 stops running, and the mixture of the viscosity reducer and the oil can reduce the temperature of the oil in the inner cavity of the mop barrel 1. After a period of time, the heat of the oil outside the mop barrel 1 will be transferred to the oil in the inner cavity of the mop barrel 1. The temperature sensor installed on the inner wall of the mop barrel 1 can detect the temperature of the oil in the inner cavity of the mop barrel 1. In order to avoid the high temperature of the oil affecting the service life of the pressure gauge 22, when the temperature sensor detects that the temperature of the oil in the inner cavity of the mop barrel 1 exceeds the safety value, the controller 20 runs again. The controller 20 passes the viscosity reducer into the inner cavity of the mop barrel 1, thereby reducing the temperature of the oil in the inner cavity of the mop barrel 1.

[0045] When the mop barrel 1 is placed in the oil well, the staff can control the extension pipe 10 to place the mop barrel 1 at the bottom of the oil well. The extension pipe 10 provides support for the mop barrel 1, avoiding the phenomenon of drift of the mop barrel 1 in the oil. When the rotating head 3 rotates, the extension pipe 10 can provide limiting action for the mop barrel 1, avoiding the phenomenon of self-rotation of the mop barrel 1.

[0046] In some embodiments, the cross section of the connecting plate 13 at the upper and lower ends is triangular. When the oil flows along the inner wall of the mop barrel 1, in order to avoid the blocking effect of the connecting plate 13 on the oil, the upper and lower ends of the connecting plate 13 can cut the oil. On the one hand, the shape of the upper and lower ends of the connecting plate 13 can reduce the resistance of the connecting plate 13 to the oil. On the other hand, the connecting plate 13 can cut the impurities contained in the oil, avoiding the phenomenon of blockage when the oil flows out of the liquid outlet hole 2.

[0047] In some embodiments, the outer wall of the mop barrel 1 is fixedly connected with a resisting seat 9 around the periphery. The resisting seat 9 is provided with a sliding hole 16 inside. The inner wall of the sliding hole 16 is fixedly connected with a spring 26 through a fixed ring 27. The side end of the spring 26 is fixedly connected with a sliding column 8. The sliding column 8 is in sliding connection with the inner wall of the sliding hole 16. The side end of the sliding column 8 is fixedly connected with a resisting plate 7 in the shape of a circular arc. When the mop barrel 1 is placed at the bottom of the oil well, in order to further ensure the stability of the mop barrel 1, when the mop barrel 1 moves vertically downward in the oil well, the mop barrel 1 moves vertically downward with the resisting seat 9. When the mop barrel 1 stops moving in the oil, the elastic tension provided by the spring 26 drives the sliding column 8 to slide along the inner wall of the sliding hole 16. Then the sliding column 8 moves with the resisting plate 7. When the resisting plate 7 and the inner wall of the oil well resist, the spring 26 can transmit the resisting force of the resisting plate 7 and the inner wall of the oil well to the resisting seat 9 through the fixed ring 27. The resisting seat 9 transmits the resisting force to the periphery of the mop barrel 1, thereby providing limiting support for the periphery of the mop barrel 1, avoiding the phenomenon of lateral deviation of the mop barrel 1 in the oil.

[0048] When the rotating head 3 and the fin 15 rotate, vibration is generated when the rotating head 3 and the fin 15 contact the oil, and the vibration is transmitted to the drag cylinder 1, which transmits the vibration to the spring 26, which can buffer the vibration, thereby achieving the effect of buffering and damping for the drag cylinder 1.

[0049] In some specific embodiments, the outlet end of the sliding hole 16 is located at the bottom of the abutting seat 9, the cross section of the sliding hole 16 is arc-shaped, the fixed ring 27 is circular, the side end of the sliding column 8 is fixedly connected with the linear steel wire rope 6, the steel wire rope 6 penetrates the spring 26 and the fixed ring 27 in sequence, and the bottom end of the steel wire rope 6 is fixedly connected with the control ball 5 in the form of a sphere. When the drag cylinder 1 moves vertically downward in the oil well, the abutting plate 7 slides along the inner wall of the oil well. Due to the abutting of the abutting plate 7 and the inner wall of the oil well, in order to avoid the influence of the friction generated by the sliding of the abutting plate 7 and the inner wall of the oil well on the drag cylinder 1, when the drag cylinder 1 is placed in the oil well, the weight of the control ball 5 pulls the steel wire rope 6. The steel wire rope 6 pulls the sliding column 8, and the sliding column 8 retracts into the inner cavity of the sliding hole 16, and at the same time, the sliding column 8 compresses the spring 26. At this time, the abutting plate 7 is not in contact with the inner wall of the oil well, so that the friction phenomenon of the abutting plate 7 along the inner wall of the oil well can be avoided.

[0050] When the drag cylinder 1 enters the oil, the control ball 5 enters the oil, and the pressure of the oil provides buoyancy for the control ball 5. At this time, the gravity of the control ball 5 and the buoyancy provided by the oil are offset, the steel wire rope 6 no longer pulls the sliding column 8, the sliding column 8 is driven by the elastic tension of the spring 26, the sliding column 8 pops out of the inner cavity of the sliding hole 16, and the sliding column 8 abuts with the abutting plate 7 and the inner wall of the oil well. When the drag cylinder 1 is taken out of the oil, the control ball 5 is taken out of the oil, and the oil does not provide buoyancy for the control ball 5. The weight of the control ball 5 pulls the steel wire rope 6 vertically downward, the steel wire rope 6 pulls the sliding column 8 to retract into the inner cavity of the sliding hole 16, the fixed ring 27 provides a limiting effect for the steel wire rope 6, avoiding the contact between the steel wire rope 6 and the spring 26, and the spring 26 will pinch the steel wire rope 6 when compressed.

[0051] When the abutting plate 7 abuts with the inner wall of the oil well, the oil enters the inner cavity of the sliding hole 16 from the gap between the outlet end of the sliding hole 16 and the steel wire rope 6, and when the oil solidifies, the oil provides a damping effect for the spring 26. When the sliding column 8 retracts into the inner cavity of the sliding hole 16, the sliding column 8 extrudes the oil in the inner cavity of the sliding hole 16.

[0052] In some specific embodiments, the inner cavity of the rotating head 3 is conical in shape. When the oil enters the inner cavity of the rotating head 3, the area of the inner cavity of the rotating head 3 gradually increases along the height direction, so that the pressure of the oil gradually decreases, thereby avoiding the impact of the oil directly entering the inner cavity of the rotating head 3 on the fin 15.

[0053] The above has carried out the detailed explanation to several embodiments of the present application, but the embodiments of the present application are not limited to this, cannot be considered for limiting the implementation scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A deep well pressure gauge for use in oil exploration, characterised in that, Include: The drag cylinder (1), the inner wall of the drag cylinder (1) is fixedly connected with the pressure gauge (22) through the liquid collecting box (19), the bottom end of the drag cylinder (1) is rotatably connected with the rotary head (3) in the shape of a cone, the periphery of the drag cylinder (1) is respectively provided with the liquid outlet hole (2) communicated with the inner cavity of the drag cylinder (1), the bottom end of the pressure gauge (22) is fixedly connected with the elastic element (23), the rotary head (3) is equidistantly provided with a plurality of liquid inlet holes (4) communicated with the inner cavity of the rotary head (3) along the axis, the installation box (17) is fixedly connected with the servo motor (28) in the inner cavity of the installation box (17), the bottom of the installation box (17) is in the shape of a cone in cross section, the bottom end of the servo motor (28) is fixedly connected with the connecting shaft (14) through the drive shaft (29), the bottom end of the drive shaft (29) is provided with a round corner (31) on the outer edge, the outer wall of the drive shaft (29) is fixedly provided with the sealing ring (30) rotatably connected with the bottom end of the installation box (17), the liquid outlet hole (2) is located between the connecting plate (13) and the elastic element (23); The wing leaf (15) is fixedly connected with the outer wall of the connecting shaft (14), and the wing leaf (15) is rotatably connected with the inner wall of the rotary head (3); The outer wall of the drag cylinder (1) is respectively fixedly connected with the abutting seat (9), the inside of the abutting seat (9) is provided with the sliding hole (16), the inner wall of the sliding hole (16) is fixedly connected with the spring (26) through the fixed ring (27), the side end of the spring (26) is fixedly connected with the sliding column (8), the sliding column (8) is slidably connected with the inner wall of the sliding hole (16), and the side end of the sliding column (8) is fixedly connected with the abutting plate (7) in the shape of a circular arc; The outlet end of the sliding hole (16) is located at the bottom of the abutting seat (9), the cross section of the sliding hole (16) is in the shape of a circular arc, the fixed ring (27) is in the shape of a circular ring, the side end of the sliding column (8) is fixedly connected with the steel wire rope (6) in the shape of a line, the steel wire rope (6) penetrates the spring (26) and the fixed ring (27) in sequence, and the bottom end of the steel wire rope (6) is fixedly connected with the control ball (5) in the shape of a sphere. The top end of the rotary head (3) is fixedly connected with the rotary seat (24), the bottom of the drag cylinder (1) is provided with the rotary groove (25), the rotary seat (24) is rotatably connected with the inner wall of the rotary groove (25), and is clamped and connected with the inner wall of the rotary groove (25).

2. A deep well pressure gauge for use in oil production according to claim 1, characterized in that The top end of the pressure gauge (22) is fixedly connected with the conveying line (12) penetrating the top of the drag cylinder (1), the outer wall of the conveying line (12) is sleeved with the protective tube (11), the bottom end of the protective tube (11) is fixedly connected with the drag cylinder (1), and the axis of the protective tube (11) coincides with the axis of the liquid collecting box (19).

3. A deep well pressure gauge for use in oil production according to claim 1, characterized in that The outer part of the protective tube (11) is provided with the extension tube (10), a plurality of liquid passage holes (18) are provided on the top of the drag cylinder (1) along the axis, the bottom end of the extension tube (10) is fixedly connected with the drag cylinder (1), and the extension tube (10) is communicated with the inner cavity of the liquid collecting box (19) through the liquid passage hole (18).

4. A deep well pressure gauge for use in oil production according to claim 3, characterised in that, ​ 5. A deep well pressure gauge for use in oil production according to claim 4, characterised in that, The inner wall of the liquid collecting tank (19) is fixedly connected with a plurality of controllers (20), the bottom end of the controller (20) is fixedly connected with a spray head (21) penetrating through the bottom of the liquid collecting tank (19), and the spray head (21) is in communication with the inner cavity of the mop bucket (1).

6. A deep well pressure gauge for use in oil production according to claim 1, characterized in that The cross section of the connecting plate (13) at the upper and lower ends is triangular.

7. A deep well pressure gauge for use in oil production according to claim 1, characterized in that The inner cavity of the rotating head (3) is in the shape of a cone.

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