Sand fishing barrel for low-pressure oil and gas well

Abstract

The utility model relates to the technical field of oil exploitation, and discloses a low-pressure oil and gas well sand bailing barrel which comprises a sand bailing barrel body, a sand bailing barrel fixing shaft is fixedly connected to the center of the upper end of the sand bailing barrel body, two sand inlets are formed in the lower end of the sand bailing barrel body, a sand bailing device is arranged in the sand bailing barrel body, and the sand bailing device comprises two sliding groove rails. According to the low-pressure oil and gas well sand fishing barrel, petroleum and other liquid can flow out of gaps between the one-way rotating plates, after the sand fishing barrel body moves upwards out of a well, the sand fishing barrel body and a structure on the sand fishing barrel body are installed on the sand fishing barrel body, a waterproof motor is started, and the waterproof motor can drive the one-way rotating plates to be disengaged from a sand inlet; at the moment, sand and impurities in the sand fishing barrel body are not blocked by the one-way rotating plate and can fall out from the two sand inlets, the problem that the sand and the impurities are not easy to take out in the sand fishing barrel body is solved, and the sand fishing efficiency is improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of oil extraction, in particular to a sand fishing barrel for low-pressure oil and gas wells. Background Art

[0002] A sand bailer is a device used to extract sand from the ocean or rivers, mainly used in the process of oil drilling.

[0003] The sand fishing barrel for low-pressure oil and gas wells is a tool dedicated to well repair operations in oil and gas development. Compared with the traditional sand fishing methods of process technology, it can fish for rocks or fish with larger diameters and small objects, and will not cause damage to the production layer, effectively removing sand.

[0004] However, most of the existing sand fishing barrels cannot discharge the sand in them well, which is very unfavorable for well repair operations in oil and gas development. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a sand fishing barrel for low-pressure oil and gas wells, which has the advantages of convenient feeding and high stability, and solves the problem that most of the existing sand fishing barrels cannot discharge the sand in them well, which is very unfavorable for well repair operations in oil and gas development.

[0007] (II) Technical Solutions

[0008] To achieve the above purposes of convenient feeding and high stability, the utility model provides the following technical solutions: A sand fishing barrel for low-pressure oil and gas wells includes a sand fishing barrel body. A sand fishing barrel fixed shaft is fixedly connected to the center position at the upper end of the sand fishing barrel body. Two sand inlet openings are provided at the lower end of the sand fishing barrel body, and a sand fishing device is arranged inside. The sand fishing device includes two chute rails.

[0009] Among them, both of the two chute rails are fixedly connected to both sides of the inner wall of the sand fishing barrel body. Sliders are slidably connected in both of the two chute rails. A connecting rod is fixedly connected between the two sliders. The lower edges of both of the two sand inlet openings are fixedly connected with shoveling plates for guiding sand into the sand inlet openings.

[0010] Among them, the connecting rod is located above the two sand inlet openings, and a plurality of one-way rotating plates for blocking the outflow of large pieces of sand are sleeved on the outer surface of the connecting rod.

[0011] Preferably, torsion springs for maintaining the positions of the one-way rotating plates are arranged between the one-way rotating plates and the connecting rod. A plurality of one-way rotating plates are all in contact with the inner edges of the sand inlet openings. Restricted by their installation positions and torsion springs, the one-way rotating plates can only rotate towards the inside of the sand inlet openings and cannot rotate in the reverse direction.

[0012] Preferably, a C-shaped connecting frame is fixedly connected to the outer surface of the connecting rod, and two racks are fixedly connected to the upper surface of the C-shaped connecting frame, and the two racks extend out of the upper surface of the sand bailing tube body.

[0013] Preferably, the two racks are both slidably connected to the top wall of the sand bailing tube body, a mounting plate is fixedly mounted on the upper surface of the sand bailing tube body, and two rotating shaft fixing plates are fixedly connected to the upper surface of the mounting plate.

[0014] Preferably, a rotating shaft is rotatably connected between the two rotating shaft fixing plates, a worm gear is rotatably connected to the outer surface of the rotating shaft, both ends of the rotating shaft have a sand bailing tube body that rotates through the outer surfaces of the two rotating shaft fixing plates, and the fixing sleeve is provided with a gear.

[0015] Preferably, the gears are respectively meshed with corresponding racks, a waterproof motor is fixedly connected to the upper surface of the mounting plate, the waterproof motor has a certain degree of waterproof performance, a worm is fixedly sleeved on the outer surface of the output shaft of the waterproof motor, and the worm is meshed with the worm wheel.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a low-pressure oil and gas well sand bailing tube, which has the following beneficial effects:

[0018] 1. The low-pressure oil and gas well sand bailing drum can effectively remove impurities at the bottom of the well through the rotation of the sand bailing drum body. When the sand bailing drum body moves upward, the one-way rotating plate can return to its original position. At this time, the sand and impurities in the sand bailing drum body can be blocked by the one-way rotating plate, and oil and other liquids can flow out from the gaps between the one-way rotating plates. After the sand bailing drum body moves upward out of the well, the sand bailing drum body and the structure thereon are installed on the sand bailing drum body, and the waterproof motor is started. The waterproof motor will drive the one-way rotating plate to break away from the fit with the sand inlet. At this time, the sand and impurities in the sand bailing drum body are no longer blocked by the one-way rotating plate and can fall out from the two sand inlets, thereby avoiding the problem that the sand and impurities are difficult to be taken out of the sand bailing drum body, thereby improving the efficiency of sand bailing to a certain extent.

[0019] 2. The low-pressure oil and gas well sand bailing barrel has a certain degree of self-locking property through the worm wheel and worm, which can ensure the stability of the one-way turntable moving up and down to a certain extent. At the same time, because the worm wheel and worm have a certain deceleration property, the two racks can have a large torque when moving up and down, so that the operation will not be affected by the sand in the sand bailing barrel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2This is a schematic diagram of the external structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal section of the utility model.

[0023] In the figure: 1. Sand dredging barrel body; 2. Sand dredging barrel fixing shaft; 3. Sand inlet; 4. Chute rail; 5. Slide block; 6. Connecting rod; 7. One-way rotating plate; 8. C-shaped connecting frame; 9. Rack; 10. Sand shoveling plate; 11. Mounting plate; 12. Rotating shaft fixing plate; 13. Rotating shaft; 14. Gear; 15. Worm gear; 16. Worm; 17. Waterproof motor. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-3 , the present utility model provides a new technical solution: a sand dredging barrel for low-pressure oil and gas wells, including a sand dredging barrel body 1, the upper center position of the sand dredging barrel body 1 is fixedly connected with a sand dredging barrel fixing shaft 2, two sand inlets 3 are opened at the lower end of the sand dredging barrel body 1, and a sand dredging device is arranged inside, and the sand dredging device includes two chute rails 4;

[0026] Further, among them, both of the two chute rails 4 are fixedly connected to both sides of the inner wall of the sand dredging barrel body 1, both of the two chute rails 4 are slidably connected with a slide block 5, a connecting rod 6 is fixedly connected between the two slide blocks 5, and the lower edges of both of the two sand inlets 3 are fixedly connected with a sand shoveling plate 10 for guiding sand into the sand inlet 3;

[0027] Further, among them, the connecting rod 6 is located above the two sand inlets 3, and a plurality of one-way rotating plates 7 for blocking the outflow of large sand particles are sleeved on the outer surface of the connecting rod 6.

[0028] Further, a torsion spring for maintaining the position of the one-way rotating plate 7 is arranged between the one-way rotating plate 7 and the connecting rod 6, and a plurality of one-way rotating plates 7 are all in contact with the inner edge of the sand inlet 3. Restricted by its installation position and the torsion spring, the one-way rotating plate 7 can only rotate in the direction into the sand inlet 3 and cannot rotate in the reverse direction.

[0029] Further, a C-shaped connecting frame 8 is fixedly connected to the outer surface of the connecting rod 6, and two racks 9 are fixedly connected to the upper surface of the C-shaped connecting frame 8, and both of the two racks 9 extend out of the upper surface of the sand dredging barrel body 1.

[0030] Further, both of the two racks 9 are slidably connected to the top wall of the sand dredging barrel body 1. An installation plate 11 is fixedly installed on the upper surface of the sand dredging barrel body 1, and two rotating shaft fixing plates 12 are fixedly connected to the upper surface of the installation plate 11.

[0031] Further, a rotating shaft 13 is rotatably connected between the two rotating shaft fixing plates 12. A worm gear 15 is rotatably connected to the outer surface of the rotating shaft 13. Both ends of the rotating shaft 13 rotatably penetrate through the outer surfaces of the two rotating shaft fixing plates 12 of the sand dredging barrel body 1, and gears 14 are fixedly sleeved thereon.

[0032] Further, the gears 14 are respectively meshed with the corresponding racks 9. A waterproof motor 17 is fixedly connected to the upper surface of the installation plate 11. The waterproof motor 17 has a certain degree of waterproof performance and is a prior art.

[0033] Further, a worm 16 is fixedly sleeved on the outer surface of the output shaft of the waterproof motor 17, and the worm 16 is meshed with the worm gear 15.

[0034] Further, during use, after the sand dredging barrel body 1 is connected to the drill pipe and the drilling rig and enters the drilling well, the rotation of the sand dredging barrel body 1 can enable the sediment at the bottom of the drilling well to enter the sand inlet 3. At the same time, the one-way rotating plate 7 will rotate inward until the impurities at the bottom of the well can be effectively removed. When the sand dredging barrel body 1 moves upward, the one-way rotating plate 7 can return to its original position. At this time, the sand and impurities in the sand dredging barrel body 1 can be blocked by the one-way rotating plate 7, while the oil and other liquids can flow out from the gaps between the one-way rotating plates 7. When the sand dredging barrel body 1 moves upward out of the drilling well, by installing the sand dredging barrel body 1 and its upper structure on the sand dredging barrel body 1 and starting the waterproof motor 17, the waterproof motor 17 will drive the worm 16 on its output shaft to rotate, and the worm 16 will drive the two gears 14 thereon to rotate through the rotating shaft 13. The rotation of the two gears 14 can drive the two corresponding racks 9 to move up and down, so that the one-way rotating plate 7 thereon can be driven to move upward through the C-shaped connecting frame 8, so that the one-way rotating plate 7 is separated from the fit with the sand inlet 3. At this time, the sand and impurities in the sand dredging barrel body 1 are no longer blocked by the one-way rotating plate 7 and can fall out from the two sand inlets 3, avoiding the problem that the sand and impurities are not easy to take out in the sand dredging barrel body 1, and improving the sand dredging efficiency to a certain extent.

[0035] Further, the worm gear 15 and the worm 16 provided have a certain degree of self-locking property, which can ensure the stability of the up and down movement of the one-way rotating plate 7 to a certain extent. At the same time, due to the worm gear 15 and the worm 16 having a certain degree of deceleration property, a large torque can be generated when the two racks 9 move up and down, so that their operation will not be affected by the sand in the sand dredging barrel body 1.

[0036] Working principle: When in use, after the sand fishing barrel body 1 is connected to the drill pipe and the drilling rig and enters the wellbore, the rotation of the sand fishing barrel body 1 enables the sediment at the bottom of the wellbore to enter the sand inlet 3. At the same time, the one-way rotating plate 7 will rotate inward until the impurities at the bottom of the well can be effectively removed. When the sand fishing barrel body 1 moves upward, the one-way rotating plate 7 can return to its original position. At this time, the sand and impurities in the sand fishing barrel body 1 can be blocked by the one-way rotating plate 7, while the oil and other liquids can flow out from the gaps between the one-way rotating plates 7. When the sand fishing barrel body 1 moves upward out of the wellbore, by installing the sand fishing barrel body 1 and its upper structure on the sand fishing barrel body 1 and starting the waterproof motor 17, the waterproof motor 17 will drive the worm 16 on its output shaft to rotate, and the worm 16 will drive the two gears 14 on it to rotate through the rotating shaft 13. The rotation of the two gears 14 can drive the two corresponding racks 9 to move up and down, so that the one-way rotating plate 7 on the C-shaped connecting frame 8 can move upward, making the one-way rotating plate 7 separate from the sand inlet 3. At this time, the sand and impurities in the sand fishing barrel body 1 are no longer blocked by the one-way rotating plate 7 and can fall out from the two sand inlets 3, avoiding the problem that the sand and impurities are not easy to take out in the sand fishing barrel body 1 and improving the sand fishing efficiency to a certain extent.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand fishing barrel for low-pressure oil and gas wells, comprising a sand fishing barrel body (1), characterized in that: A sand dredging barrel fixing shaft (2) is fixedly connected to the center position at the upper end of the sand dredging barrel body (1). Two sand inlets (3) are opened at the lower end of the sand dredging barrel body (1). A sand dredging device is arranged inside, and the sand dredging device includes two chute rails (4). Among them, the two chute rails (4) are fixedly connected to both sides of the inner wall of the sand dredging barrel body (1). Sliders (5) are slidably connected inside the two chute rails (4). A connecting rod (6) is fixedly connected between the two sliders (5). Shoveling plates (10) for guiding sand into the sand inlets (3) are fixedly connected to the lower edges of the two sand inlets (3). Among them, the connecting rod (6) is located above the two sand inlets (3). A plurality of one-way rotating plates (7) for blocking the outflow of large pieces of sand are sleeved on the outer surface of the connecting rod (6).

2. The sand fishing barrel for low-pressure oil and gas wells according to claim 1, wherein: Torsion springs for maintaining the position of the one-way rotating plates (7) are arranged between the one-way rotating plates (7) and the connecting rod (6). The plurality of one-way rotating plates (7) are all in contact with the inner edges of the sand inlets (3). Restricted by their installation positions and torsion springs, the one-way rotating plates (7) can only rotate towards the inside of the sand inlets (3) and cannot rotate in the reverse direction.

3. A sand fishing barrel for low-pressure oil and gas wells according to claim 1, characterized in that: A C-shaped connecting frame (8) is fixedly connected to the outer surface of the connecting rod (6). Two racks (9) are fixedly connected to the upper surface of the C-shaped connecting frame (8). The two racks (9) both extend out of the upper surface of the sand dredging barrel body (1).

4. The sand fishing barrel for low-pressure oil and gas wells according to claim 3, characterized in that: The two racks (9) are both slidably connected to the top wall of the sand dredging barrel body (1). An installation plate (11) is fixedly installed on the upper surface of the sand dredging barrel body (1). Two rotating shaft fixing plates (12) are fixedly connected to the upper surface of the installation plate (11).

5. A sand fishing barrel for low-pressure oil and gas wells according to claim 4, characterized in that: A rotating shaft (13) is rotatably connected between the two rotating shaft fixing plates (12). A worm gear (15) is rotatably connected to the outer surface of the rotating shaft (13). Both ends of the rotating shaft (13) penetrate through the outer surfaces of the two rotating shaft fixing plates (12) and are fixedly sleeved with gears (14).

6. The sand fishing barrel for low-pressure oil and gas wells according to claim 5, wherein: The gears (14) are respectively meshed with the corresponding racks (9). A waterproof motor (17) is fixedly connected to the upper surface of the installation plate (11). The waterproof motor (17) has a certain degree of waterproof performance. A worm (16) is fixedly sleeved on the outer surface of the output shaft of the waterproof motor (17). The worm (16) is meshed with the worm gear (15).

Images