Pressure-bearing plugging device adopting drilling fluid plugging agent

Abstract

The utility model discloses a pressure-bearing plugging device adopting drilling fluid plugging agent, which comprises a connecting pipe and a base plate arranged at the bottom of the connecting pipe, an inner protective layer is arranged in the middle of the connecting pipe, a motor is arranged in the inner protective layer, a transmission line is arranged on the motor, a central shaft is arranged at the bottom of the motor, and the transmission line is arranged on the central shaft. A main bevel gear is arranged on the center shaft, a shaft sleeve is arranged at the bottom of the center shaft, sliding grooves are formed in the upper portion and the lower portion of the interior of the base plate respectively, small sliding rods are arranged in the sliding grooves, small springs are arranged on the small sliding rods, fixing nails are arranged in the two sides of the base plate respectively, and baffles are arranged behind the fixing nails. Sliding blocks are arranged on the two sides, the upper portion and the lower portion of the baffle respectively, a screw rod is arranged behind the baffle, an auxiliary bevel gear is arranged behind the screw rod, and when fixing nails on the two sides are inserted into the well wall, the base plate can be stably fixed in the well, so that the leaking stoppage device is more stable, and the poor leaking stoppage preventing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to drilling plugging, and in particular relates to a pressure-bearing plugging device using a drilling fluid plugging agent. Background Art

[0002] A drilling pressure-bearing plugging device is a device used to plug leakage at the wellhead or wellbore during drilling operations. It is mainly used in oil and gas drilling projects. When a leak occurs at the wellhead or wellbore, a plugging agent can be used quickly to plug the leak to avoid serious consequences such as oil and gas leakage and well wall collapse. The drilling pressure-bearing plugging device plays an important role in oil and gas drilling operations. It can ensure the safety and smooth progress of the drilling process. It can respond quickly and effectively plug leaks, reduce the risk of oil and gas leakage, and protect the environment and personnel safety. However, the plugging devices currently on the market lack a device that can fix the chassis in the well if they encounter high pressure in the well or pressure of the drilling fluid during the plugging process. As a result, the plugging device may not be able to effectively plug the leak in the well due to pressure during operation. Utility Model Content

[0003] The purpose of the utility model is to provide a pressure-bearing plugging device using a drilling fluid plugging agent to solve the problem raised in the above background technology that the plugging devices currently on the market lack a device that can fix the chassis in the well if they encounter high pressure in the well or pressure of the drilling fluid during the plugging process, resulting in the plugging device being unable to effectively plug the well due to pressure during operation.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressure-bearing plugging device using a drilling fluid plugging agent, comprising a connecting pipe and a chassis arranged at the bottom of the connecting pipe;

[0005] A fixing cylinder is provided above the chassis;

[0006] An inner protective layer is provided in the middle of the connecting tube, a motor is provided inside the inner protective layer, a transmission line is provided on the motor, a central shaft is provided at the bottom of the motor, a main bevel gear is provided on the central shaft, a shaft sleeve is provided at the bottom of the central shaft, slide grooves are provided at the upper and lower parts of the chassis, a small slide rod is provided inside the slide groove, a small spring is provided on the small slide rod, fixing nails are provided at both sides of the chassis, a baffle is provided behind the fixing nail, sliders are provided on both sides and at the upper and lower parts of the baffle, a screw is provided behind the baffle, and a secondary bevel gear is provided behind the screw.

[0007] Preferably, the chassis is fixedly connected to the connecting pipe, and the small sliding rod is fixed inside the sliding groove.

[0008] Preferably, the small spring is sleeved with a small slide rod, and the small slide rod passes through the slider.

[0009] Preferably, the screw is connected to the baffle via threads, and the screw is fixedly connected to the secondary bevel gear.

[0010] Preferably, the motor is fixed inside the inner protective layer, the central shaft is rotatably connected to the shaft sleeve, and the main bevel gears are meshed with the secondary bevel gears.

[0011] Preferably, cavity columns are respectively provided on both sides of the fixed cylinder, the cavity columns are fixedly connected to the fixed cylinder, and a large sliding rod is provided inside the cavity columns.

[0012] Preferably, a large spring is provided on the outside of the large slide bar, the large spring is sleeved with the large slide bar, a sleeve rod is provided on the large slide bar, and the large slide bar is plugged with the sleeve rod.

[0013] Preferably, a rotating member is provided at one end of the sleeve rod, an upper wheel support is provided between the rotating members, a lower wheel support is provided between the upper wheel supports, and the upper wheel support and the lower wheel support are movably connected to the rotating member.

[0014] Preferably, pulleys are provided on the upper wheel support and the lower wheel support, a torsion spring is provided between the lower wheel supports, and plugging agent channels are provided on both sides of the inner protective layer.

[0015] Compared with the prior art, the present invention provides a pressure-bearing plugging device using a drilling fluid plugging agent, which has the following beneficial effects:

[0016] 1. Through the arrangement of fixing nails, baffles, sliders, slides, small slide rods, small springs, screws, main bevel gears, secondary bevel gears, center shafts, sleeves, motors, and transmission lines, when the pressure-bearing plugging device is placed in the drilling well, when the chassis reaches the position where plugging is required, the motor is turned on by the operation of personnel outside the well, and then the motor drives the center shaft to rotate, and the center shaft drives the main bevel gears at the bottom to rotate, thereby driving the secondary bevel gears on both sides to rotate together, and the screw is driven by the secondary bevel gears to rotate. Since the baffle and the screw are threadedly connected, the baffle will push the fixing nails to move outward from the chassis, and the sliders above and below the baffle will be pushed by the small springs on the small slide rods at the rear, which better stabilizes the position of the fixing nails. When the fixing nails on both sides are inserted into the well wall, the chassis will be stably fixed in the well, thereby making the plugging device more stable and preventing poor plugging effect. After the plugging agent is injected and the plugging is completed, the motor is reversed by the operation of personnel outside the well, which will drive the main bevel gears, secondary bevel gears and screws to reverse, so that the fixing nails are retracted into the chassis, which is convenient for the recovery of the plugging device.

[0017] 2. Through the arrangement of the plugging agent channel, cavity column, large sliding rod, large spring, sleeve rod, upper wheel support, lower wheel support, pulley, torsion spring and rotating part, when the pressure-bearing plugging device is lowered into the well, the upper and lower wheel supports on both sides will be against the well wall, and the torsion spring between the lower wheel supports will have a restoring elastic force so that the upper and lower wheel supports can fit tightly against the well wall. When the sleeve rod length exceeds the wellhead diameter, the sleeve rod can be retracted into the cavity column and compress the large spring in the process. Afterwards, the restoring elastic force of the compressed spring will push the sleeve rod and the upper and lower wheel supports to be against the well wall. When the pressure-bearing plugging device is lowered, the pulleys on both sides can assist the device to reach the designated plugging area better, which is convenient for the use of the device. After reaching the plugging position, different types of plugging agents can be injected into the two plugging agent channels according to actual conditions, which can cope with cracks of different degrees and can effectively plug cracks and other locations in the well, facilitating further construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the wheel support structure of the present utility model.

[0020] In the figure: 1. Connecting pipe; 2. Fixed cylinder; 3. Large slide rod; 4. Upper wheel support; 5. Fixed nail; 6. Baffle; 7. Chassis; 8. Center shaft; 9. Bushing; 10. Secondary bevel gear; 11. Small spring; 12. Slider; 13. Small slide rod; 14. Slide groove; 15. Main bevel gear; 16. Motor; 17. Screw; 18. Pulley; 19. Sleeve rod; 20. Large spring; 21. Cavity column; 22. Inner protective layer; 23. Sealing agent channel; 24. Transmission line; 25. Lower wheel support; 26. Torsion spring; 27. Rotating part. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model provides Figure 1-2 The pressure-bearing plugging device using a drilling fluid plugging agent shown includes a connecting pipe 1 and a chassis 7 provided at the bottom of the connecting pipe 1;

[0023] A fixing cylinder 2 is provided above the chassis 7;

[0024] An inner protective layer 22 is provided in the middle of the connecting pipe 1, and a motor 16 is provided inside the inner protective layer 22. A transmission line 24 is provided on the motor 16. A central shaft 8 is provided at the bottom of the motor 16. A main bevel gear 15 is provided on the central shaft 8. A shaft sleeve 9 is provided at the bottom of the central shaft 8. Slide grooves 14 are provided at the upper and lower parts of the chassis 7 respectively. A small slide rod 13 is provided inside the slide groove 14. A small spring 11 is provided on the small slide rod 13. Fixing nails 5 are provided on both sides of the chassis 7 respectively, and a baffle 6 is provided behind the fixing nail 5. Slide blocks 12 are provided on both sides and above and below the baffle 6 respectively. A screw 17 is provided behind the baffle 6, and a secondary bevel gear 10 is provided behind the screw 17.

[0025] In this embodiment, if a leak is detected during the drilling process, the diameter of the wellhead is first measured, and a chassis 7 and a plugging device suitable for the wellhead are selected. Then, the pressure-bearing plugging device is lowered through the wellhead to the location where the leak occurs. After the pressure-bearing plugging device is fixed to form a seal, different types of plugging agents are transported to the leakage area through the plugging agent channel 23 inside the connecting pipe 1, and plugging operations are performed on leaks of different degrees. After the plugging is completed, the pressure-bearing plugging device is retracted, and the drill bit is lowered to continue the drilling operation.

[0026] like Figure 1 and Figure 2 As shown, the chassis 7 is fixedly connected to the connecting pipe 1, the small slide rod 13 is fixed inside the slide groove 14, the small spring 11 is sleeved with the small slide rod 13, the small slide rod 13 passes through the slider 12, the screw 17 is connected to the baffle 6 by a thread, the screw 17 is fixedly connected to the secondary bevel gear 10, the motor 16 is fixed inside the inner protective layer 22, the central shaft 8 is rotatably connected to the shaft sleeve 9, the main bevel gear 15 is engaged with the secondary bevel gear 10, and cavity columns 21 are respectively provided on both sides of the fixed cylinder 2. The cavity column 21 is fixedly connected to the fixed cylinder 2, and a large slide rod 3 is provided inside the cavity column 21. A large spring 20 is provided on the outside of the large slide rod 3, and the large spring 20 is sleeved with the large slide rod 3. A sleeve rod 19 is provided on the large slide rod 3, and the large slide rod 3 is plugged into the sleeve rod 19. A rotating part 27 is provided at one end of the sleeve rod 19, and an upper wheel support 4 is provided between the rotating parts 27. A lower wheel support 25 is provided between the upper wheel supports 4. The upper wheel support 4 and the lower wheel support 25 are movably connected to the rotating part 27. A pulley 18 is provided on the upper wheel support 4 and the lower wheel support 25, and a torsion spring 26 is provided between the lower wheel support 25. A plugging agent channel 23 is provided on both sides of the inner protective layer 22.

[0027] Preferably, when the pressure-bearing plugging device is placed in the drilling well, after the chassis 7 reaches the target position, the motor 16 is turned on by the operator outside the well. The motor 16 will drive the central shaft 8 to rotate, and then drive the main bevel gear 15 at the bottom and the auxiliary bevel gears 10 on both sides to rotate together. The movement of the auxiliary bevel gear 10 will cause the screw 17 to rotate, and the baffle 6 and the screw 17 are threadedly connected. At this time, the baffle 6 will push the fixing nail 5 to move outward from the chassis 7. Above and below the baffle 6, the slider 12 will be pushed by the small spring 11 to stabilize the position of the fixing nail 5. When the fixing nails 5 on both sides are inserted into the well wall, the chassis 7 will be firmly fixed in the well, thereby improving the plugging effect. After completing the work of injecting the plugging agent, the personnel outside the well can reverse the motor 16 to make the main bevel gear 15, the auxiliary bevel gear 10 and the screw rotate in the opposite direction, so that the fixing nail 5 is retracted into the chassis 7 to facilitate the recovery of the plugging device.

[0028] Preferably, when the pressure-bearing plugging device is lowered into the well, the upper wheel support 4 and the lower wheel support 25 will contact the well wall, and the torsion spring 26 provides a restoring elastic force, so that the upper wheel support 4 and the lower wheel support 25 are tightly fitted to the well wall. When the length of the sleeve rod 19 exceeds the wellhead diameter, the sleeve rod 19 can shrink toward the internal cavity column 21, and compress the large spring 20 in the process. Then the restoring elastic force of the compressed large spring 20 will push the sleeve rod 19 and the upper wheel support 4 and the lower wheel support 25 to contact the well wall again. When the pressure-bearing plugging device is lowered, the pulleys 18 on both sides can assist the device to reach the designated plugging area smoothly, which is convenient for use. After reaching the plugging position, different types of plugging agents can be injected into the two plugging agent channels according to actual conditions to deal with cracks of different degrees. This can effectively seal cracks and other problems in the well, providing convenience for further construction.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure-bearing plugging device using a drilling fluid plugging agent, comprising a connecting pipe (1) and a chassis (7) arranged at the bottom of the connecting pipe (1); A fixing cylinder (2) is provided above the chassis (7); Its characteristics are: An inner protective layer (22) is provided in the middle of the connecting tube (1), a motor (16) is provided inside the inner protective layer (22), a transmission line (24) is provided on the motor (16), a central shaft (8) is provided at the bottom of the motor (16), a main bevel gear (15) is provided on the central shaft (8), a shaft sleeve (9) is provided at the bottom of the central shaft (8), a slide groove (14) is provided at the upper and lower parts of the chassis (7), a small slide rod (13) is provided at the inner part of the slide groove (14), a small spring (11) is provided on the small slide rod (13), fixing nails (5) are provided at the inside of both sides of the chassis (7), a baffle (6) is provided behind the fixing nail (5), sliders (12) are provided on both sides and at the upper and lower parts of the baffle (6), a screw rod (17) is provided behind the baffle (6), and a secondary bevel gear (10) is provided behind the screw rod (17).

2. A pressure-bearing plugging device using a drilling fluid plugging agent according to claim 1, characterized in that: The chassis (7) is fixedly connected to the connecting pipe (1), and the small sliding rod (13) is fixed inside the sliding groove (14).

3. A pressure-bearing plugging device using a drilling fluid plugging agent according to claim 2, characterized in that: The small spring (11) is sleeved with the small slide bar (13), and the small slide bar (13) passes through the slider (12).

4. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 3, characterized in that: The screw (17) is connected to the baffle (6) via threads, and the screw (17) is fixedly connected to the secondary bevel gear (10).

5. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 4, characterized in that: The motor (16) is fixed inside the inner protective layer (22), the central shaft (8) is rotatably connected to the shaft sleeve (9), and the main bevel gear (15) is meshed with the secondary bevel gear (10).

6. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 1, characterized in that: Cavity columns (21) are respectively provided on both sides of the fixed cylinder (2), the cavity columns (21) are fixedly connected to the fixed cylinder (2), and a large sliding rod (3) is provided inside the cavity columns (21).

7. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 6, characterized in that: A large spring (20) is provided on the outside of the large slide bar (3), and the large spring (20) is sleeved with the large slide bar (3). A sleeve rod (19) is provided on the large slide bar (3), and the large slide bar (3) is plugged with the sleeve rod (19).

8. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 7, characterized in that: A rotating member (27) is provided at one end of the sleeve rod (19), an upper wheel support (4) is provided between the rotating members (27), a lower wheel support (25) is provided between the upper wheel supports (4), and the upper wheel support (4), the lower wheel support (25) and the rotating member (27) are movably connected.

9. The pressure-bearing plugging device using a drilling fluid plugging agent according to claim 8, characterized in that: Pulleys (18) are provided on the upper wheel support (4) and the lower wheel support (25), a torsion spring (26) is provided between the lower wheel support (25), and plugging agent channels (23) are respectively provided on both sides of the inner protective layer (22).

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