Blockage removing and well washing device for heavy oil well

Abstract

The utility model relates to a thick oil well unblocking and well washing device which comprises an annular support, a horizontal bottom plate, a driving mechanism, an unblocking assembly and a guide mechanism, and is technically characterized in that cylinder rods of radial telescopic cylinders of the guide mechanism extend outwards, guide wheels are driven by connecting rods and supports to be tightly connected with the underground inner wall, and under the guiding action of the guide wheels, unblocking is achieved. When the device reaches a pre-unblocking position, compressed gas is injected into the concentric annular air bag through the concentric annular air cavity, the concentric annular air bag is in close contact with the underground inner wall after being expanded to achieve positioning, compared with the prior art, an ejecting screw does not need to be rotated underground, operation is convenient, time and labor are saved, and the unblocking and well washing efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal well washing, in particular to a plugging removal and well washing device for heavy oil wells. Background Technique

[0002] During the production process of heavy oil wells, the phenomena of wax and scale deposition on the tubing are very serious, which gradually reduces the oil flow channel and even blocks it, resulting in a decrease in the oil well production or even shutdown; at the same time, it will also increase the load of the sucker rod pump, shorten the service life of the sucker rod pump, and affect the normal production of the oil well. Therefore, a plugging removal device is generally used for timely treatment.

[0003] For example, CN 220815605 U discloses a plugging removal device for oil production wells, which includes a fixed ring, two guide rails are installed on the fixed ring, a positioning plate is installed inside the fixed ring, and a hollow rotating shaft is connected to the positioning plate through a bearing. By arranging the hollow rotating shaft between the rotary joint and the nozzle, the solution for softening the scale can be transported, so that there is no need for external pipeline connection, which will not affect the rotation of the hollow rotating shaft and the expanding structure. Through the support of the hollow rotating shaft for the expanding structure and the scraper, and through the arranged guide rails, the overall lifting of the hollow rotating shaft for the expanding structure is realized. However, there are the following problems: during use, it is necessary to rotate each tightening screw to position the fixed ring in the oil well pipeline, which is inconvenient to operate and time-consuming and laborious. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a plugging removal and well washing device for heavy oil wells with reasonable structure and reliable use to solve the above problems, which is convenient to operate and significantly improves the efficiency of plugging removal and well washing.

[0005] The technical solution of the utility model is as follows:

[0006] A plugging removal and well flushing device for heavy oil wells, comprising an annular support, a horizontal bottom plate provided at the bottom of the annular support, a driving mechanism provided on the horizontal bottom plate, a plugging removal assembly connected to the driving mechanism, and a guiding mechanism connected to the horizontal bottom plate. The technical key points are as follows: A concentric annular air cavity is provided inside the outer peripheral wall of the annular support, and a concentric annular airbag communicated with the concentric annular air cavity is embedded on the outer peripheral surface of the annular support. The guiding mechanism includes a fixed column fixed at the center of the lower surface of the horizontal bottom plate, a plurality of radial telescopic cylinders provided on the outer periphery of the fixed column, a connecting rod hinged to the end of the cylinder rod of the radial telescopic cylinder, a connecting ear provided on the lower surface of the horizontal bottom plate around the fixed column and connected to the radial telescopic cylinder one by one, a support hinged between the connecting ear and the connecting rod, and a guiding wheel provided on the support. The axle of the guiding wheel is parallel to the horizontal plane. The plugging removal assembly includes two longitudinal plugging removal liquid / gas delivery risers symmetrically arranged around the fixed column, and a nozzle provided at the lower end of the longitudinal plugging removal liquid / gas delivery riser. The upper part of the longitudinal plugging removal liquid / gas delivery riser is supported on the horizontal bottom plate by a bearing and connected to the driving mechanism, and the nozzle is located below the guiding wheel in the vertical direction.

[0007] For the above plugging removal and well flushing device for heavy oil wells, a portal-shaped connecting seat is fixed on the upper edge of the annular support, a lifting ring is fixed in the middle of the top surface of the portal-shaped connecting seat, a steel wire rope is connected to the lifting ring, and the upper end of the steel wire rope bypasses a fixed pulley supported at the center of the wellhead and is connected to a winch.

[0008] For the above plugging removal and well flushing device for heavy oil wells, the driving mechanism includes a cantilever frame supported on the upper surface of the horizontal bottom plate, a driving gear supported between the horizontal section of the cantilever frame and the horizontal bottom plate, a driven gear provided on the longitudinal plugging removal liquid / gas delivery riser and meshing with the driving gear, and a driving motor provided above the horizontal section of the cantilever frame and connected to the axle of the driving gear. The center line of the driving gear coincides with the center line of the annular support.

[0009] For the above plugging removal and well flushing device for heavy oil wells, a panoramic camera is fixed on the lower end surface of the fixed column.

[0010] For the above plugging removal and well flushing device for heavy oil wells, the support is in an inverted T shape, its upper end is hinged to the connecting ear, the end close to the fixed column is hinged to the connecting rod, and the end far from the fixed column is connected to the guiding wheel by a shaft seat.

[0011] For the above plugging removal and well flushing device for heavy oil wells, the upper end of the longitudinal plugging removal liquid / gas delivery riser is connected to an external pipeline by a rotary joint.

[0012] For the above plugging removal and well flushing device for heavy oil wells, an air injection joint is provided on the top surface of the concentric annular air cavity and is connected to a compressed gas pipeline through the air injection joint.

[0013] The beneficial effects of the present utility model are:

[0014] In use, lower this device. The piston rods of the radial telescopic cylinders of the guiding mechanism extend outwards. Through the connecting rods and supports, the guiding wheels are driven to be in close contact with the inner wall of the well. Under the guiding action of each guiding wheel, this device reaches the pre-unblocking position. Then, compressed gas is injected into the concentric annular airbag through the concentric annular air cavity. After the concentric annular airbag expands, it is in close contact with the inner wall of the well to achieve positioning. Compared with the prior art, there is no need for a "tightening screw" to rotate underground, which is convenient to operate, time-saving and labor-saving, and significantly improves the efficiency of unblocking and well flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is Figure 1 a schematic diagram of the positional relationship of each radial telescopic cylinder and the longitudinal unblocking liquid / gas delivery riser in

[0017] In the figure: 1. wire rope, 2. fixed pulley, 3. lifting ring, 4. driving motor, 5. portal connecting seat, 6. rotary joint, 7. annular bracket, 8. concentric annular air cavity, 9. concentric annular airbag, 10. connecting ear, 11. guiding wheel, 12. support, 13. longitudinal unblocking liquid / gas delivery riser, 14. nozzle, 15. radial telescopic cylinder, 16. panoramic camera, 17. fixed column, 18. connecting rod, 19. horizontal bottom plate, 20. cantilever frame, 21. driving gear, 22. driven gear, 23. gas injection joint, 24. well wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be described in detail according to the accompanying drawings of the specification.

[0019] As Figure 1 , Figure 2 shown, this heavy oil well unblocking and well flushing device includes an annular bracket 7, a horizontal bottom plate 19 provided at the bottom of the annular bracket 7, a driving mechanism provided on the horizontal bottom plate 19, a plugging and washing assembly connected to the driving mechanism, and a guiding mechanism connected to the horizontal bottom plate 19.

[0020] Among them, a concentric annular air cavity 8 is provided inside the outer peripheral wall of the annular bracket 7, a concentric annular airbag 9 communicating with the concentric annular air cavity 8 is embedded on the outer peripheral surface of the annular bracket 7, and an air injection joint 23 is provided on the top surface of the concentric annular air cavity 8 and is connected to a compressed gas pipeline through the air injection joint 23.

[0021] The guiding mechanism includes a fixed column 17 fixed to the center of the lower surface of the horizontal bottom plate 19, a plurality of radially telescopic cylinders 15 arranged on the outer periphery of the fixed column 17, a connecting rod 18 hinged to the end of the cylinder rod of the radially telescopic cylinder 15, connecting lugs 10 arranged on the lower surface of the horizontal bottom plate 19 around the fixed column 17 and corresponding to the radially telescopic cylinders 15 one by one, a support 12 hinged between the connecting lug 10 and the connecting rod 18, and a guiding wheel 11 arranged on the support 12. The axle of the guiding wheel 11 is parallel to the horizontal plane. In this embodiment, the support 12 is in an inverted T shape, its upper end is hinged to the connecting lug 10, the end near the fixed column is hinged to the connecting rod 18, and the end far from the fixed column is connected to the guiding wheel 11 by a shaft seat.

[0022] The plugging removal assembly includes two longitudinal plugging removal liquid / gas delivery risers 13 symmetrically arranged around the fixed column 17, and a spray head 14 arranged at the lower end of the longitudinal plugging removal liquid / gas delivery riser 13. The upper part of the longitudinal plugging removal liquid / gas delivery riser 13 is supported on the horizontal bottom plate 19 by a bearing and connected to the driving mechanism. The spray head 14 is located below the guiding wheel 11 in the vertical direction. In this embodiment, the driving mechanism includes a cantilever frame 20 supported on the upper surface of the horizontal bottom plate 19, a driving gear 21 supported between the horizontal section of the cantilever frame 20 and the horizontal bottom plate 19, a driven gear 22 arranged on the longitudinal plugging removal liquid / gas delivery riser 13 and meshing with the driving gear 21, and a driving motor 4 arranged above the horizontal section of the cantilever frame 20 and connected to the axle of the driving gear 21. The center line of the driving gear 21 coincides with the center line of the annular bracket 7. The upper end of the longitudinal plugging removal liquid / gas delivery riser 13 is connected to an external pipeline by a rotary joint 6.

[0023] A portal-shaped connecting seat 5 is fixed to the upper edge of the annular bracket 7. A lifting ring 3 is fixed in the middle of the top surface of the portal-shaped connecting seat 5. A steel wire rope 1 is connected to the lifting ring 3. The upper end of the steel wire rope 1 bypasses a fixed pulley 2 supported at the center of the wellhead and is connected to a winch. A panoramic camera 16 is fixed to the lower end surface of the fixed column 17.

[0024] Working principle:

[0025] During use, the winch lowers the steel wire rope 1. Under the guiding action of the guiding mechanism, the device descends along the well wall 24. When it is monitored by the panoramic camera 16 and reaches the pre-plugging removal position, the winch stops operating. Compressed gas is injected into the concentric annular airbag 9 through the concentric annular air cavity 8. After the concentric annular airbag 9 expands, it comes into close contact with the inner wall of the well underground to achieve positioning. Plugging removal liquid or plugging removal gas is input into the two longitudinal plugging removal liquid / gas delivery risers 13, and the driving motor 4 is started. The two longitudinal plugging removal liquid / gas delivery risers 13 are driven to rotate through the driving gear 21 and the driven gear 22, so that the spray head 14 sprays the plugging removal liquid or plugging removal gas onto the inner wall of the well underground during rotation, completing the plugging removal and well flushing.

[0026] The above has described the embodiments of the present utility model in detail, but the above content is only the preferred embodiment of the present utility model and cannot be considered as defining the scope of implementation of the present utility model. All equal changes and improvements made within the scope of the creation of the present utility model shall still fall within the scope covered by this patent.

Claims

1. A device for removing blockage and washing a heavy oil well, comprising an annular support, a horizontal bottom plate arranged at the bottom of the annular support, a driving mechanism arranged on the horizontal bottom plate, a blocking removal component connected to the driving mechanism, and a guiding mechanism connected to the horizontal bottom plate, characterized in that: A concentric annular air cavity is provided in the outer peripheral wall of the annular bracket, and a concentric annular air bag communicating with the concentric annular air cavity is embedded in the outer peripheral surface of the annular bracket. The guide mechanism includes a fixed column fixed to the center of the lower surface of the horizontal bottom plate, a plurality of radial telescopic cylinders arranged on the outer periphery of the fixed column, a connecting rod hinged to the cylinder rod end of the radial telescopic cylinder, a connecting ear arranged on the lower surface of the horizontal bottom plate around the fixed column and corresponding to the radial telescopic cylinder one by one, a support hinged between the connecting ear and the connecting rod, and a guide wheel arranged on the support, the wheel axle of the guide wheel is parallel to the horizontal plane, the deblocking assembly includes two longitudinal deblocking liquid / gas delivery risers symmetrically arranged around the fixed column, and a nozzle arranged at the lower end of the longitudinal deblocking liquid / gas delivery riser, the upper part of the longitudinal deblocking liquid / gas delivery riser is supported on the horizontal bottom plate by a bearing and is connected to the driving mechanism, and the nozzle is located below the guide wheel in the vertical direction.

2. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: A gate-shaped connecting seat is fixed on the upper edge of the annular bracket, a lifting ring is fixed on the middle of the top surface of the gate-shaped connecting seat, a steel wire rope is connected to the lifting ring, and the upper end of the steel wire rope is connected to the winch after passing through a fixed pulley supported at the center of the wellhead.

3. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: The driving mechanism includes a cantilever frame supported on the upper surface of the horizontal bottom plate, a driving gear supported between the horizontal section of the cantilever frame and the horizontal bottom plate, a driven gear arranged on the longitudinal unblocking liquid / gas conveying riser and meshing with the driving gear, and a driving motor arranged above the horizontal section of the cantilever frame and connected to the axle of the driving gear, wherein the axis center line of the driving gear coincides with the center line of the annular support.

4. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: A panoramic camera is fixed on the lower end surface of the fixing column.

5. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: The support is in an inverted T shape, the upper end of which is hinged to the connecting ear, the end close to the fixed column is hinged to the connecting rod, and the end far away from the fixed column is connected to the guide wheel using an axle seat.

6. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: The upper end of the longitudinal plugging-removing liquid / gas delivery riser is connected to an external pipeline by a rotary joint.

7. The device for removing blockage and washing wells of heavy oil wells according to claim 1 is characterized in that: A gas injection joint is provided on the top surface of the concentric annular gas cavity and is connected to a compressed gas pipeline via the gas injection joint.

Images