A filling device and method for automatically filling knotted temporary plugging balls and fracturing fluid into a well

Abstract

The present invention discloses a filling device and method for automatically filling knotted plugging balls and fracturing fluid into a well. The present invention relates to the technical field of filling knotted plugging balls and fracturing fluid into a well. The device comprises a hollow shaft rotatably mounted in a machine platform, a driving mechanism for driving the hollow shaft to rotate is arranged between the hollow shaft and the machine platform, a turntable is welded to the upper end of the hollow shaft, a plurality of evenly distributed support seats are fixedly arranged on the outer edge of the turntable and along the circumferential direction of the turntable, and each support seat supports a temporary storage component for temporarily storing knotted plugging balls and fracturing fluid; the filling device also comprises a clamping and conveying mechanism for rotating the temporary storage component to the top of the blowout preventer; a discharging component for pressurizing the knotted plugging balls and fracturing fluid in the temporary storage tube downward is arranged on the left end of the bracket. The beneficial effects of the present invention are: greatly reducing the work intensity of workers and greatly improving the filling efficiency of knotted plugging balls and fracturing fluid.

Description

Technical Field

[0001] The invention relates to the technical field of injecting knotted temporary plugging balls and fracturing fluid into a well, in particular to a injecting device and method for automatically injecting knotted temporary plugging balls and fracturing fluid into a well. Background Art

[0002] After the oil well is drilled, cracks of the same size are formed on the side walls of the oil well. The existence of these cracks undoubtedly affects the oil production. For this reason, workers need to regularly add evenly mixed knot temporary plugging balls and fracturing fluid into the oil well to achieve the purpose of plugging the cracks. Among them, the reason for plugging the cracks is that the knot temporary plugging balls have good adaptability and can automatically adjust their shape according to different crack forms, adapt to cracks of different sizes for plugging, and achieve better plugging effect.

[0003] In a certain area, workers regularly add knotted temporary plugging balls and fracturing fluid to oil wells in the following way:

[0004] S1, workers take out multiple Figure 1 The bottom port of each cylinder 1 is blocked by a plug 2, as shown in FIG. Figure 2 As shown, workers put weighed and evenly mixed knot temporary plugging balls and fracturing fluid into each cylinder 1;

[0005] S2. The worker takes out a cylinder 1 and lifts it to the top of the blowout preventer 4 at the top of the oil well 3. Figure 3 As shown;

[0006] S3, the worker pulls out the plug 2 from the bottom port of the cylinder 1, as shown in Figure 4 As shown, at this time, the knotted temporary plugging ball and the fracturing fluid in the cylinder 1 fall from the cylinder 1 under their own gravity, and the falling direction of the knotted temporary plugging ball and the fracturing fluid is as shown in FIG. Figure 4 As shown by the middle arrow, the fallen rope knot temporary plugging ball and fracturing fluid enter the blowout preventer, and then enter the oil well from the blowout preventer 4, thereby realizing the first injection of the rope knot temporary plugging ball and fracturing fluid into the oil well 3;

[0007] S4. The worker repeats steps S2 to S3 for multiple times, and then injects the knotted temporary plugging balls and fracturing fluid in each cylinder 1 into the oil well 3 for multiple times. The knotted temporary plugging balls injected into the oil well 3 can seal cracks of different sizes.

[0008] However, although this method can inject knot temporary plugging balls and fracturing fluid into the oil well 3, in actual operation, there are still the following technical defects:

[0009] I. In step S3, it is necessary to manually lift the cylinder 1 to the position just above the blowout preventer 4 located at the top of the oil well 3, and then manually pull out the plug 2 from the bottom port of the cylinder 1, so that the knotted temporary plugging ball and fracturing fluid in the cylinder 1 can be injected into the oil well 3; and the entire injection process requires manual operation by workers, which not only increases the workers' work intensity, but also increases the injection time of the knotted temporary plugging ball and fracturing fluid, thereby reducing the injection efficiency of the knotted temporary plugging ball and fracturing fluid.

[0010] II. In step S3, due to the difference in flow speed between the knotted ball and the fracturing fluid, when the plug 2 is pulled out from the bottom port of the cylinder 1, it takes a long time for the knotted ball and the fracturing fluid in the cylinder 1 to fall out of the cylinder 1, which undoubtedly increases the filling time of the knotted ball and the fracturing fluid, and further reduces the filling efficiency of the knotted ball and the fracturing fluid.

[0011] Therefore, there is an urgent need for a filling device and method that can greatly reduce the work intensity of workers and greatly improve the efficiency of knot temporary plugging balls and fracturing fluid filling. Summary of the invention

[0012] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device and method for automatically adding knotted temporary plugging balls and fracturing fluid into a well, which greatly reduces the workload of workers and greatly improves the efficiency of adding knotted temporary plugging balls and fracturing fluid.

[0013] The purpose of the present invention is achieved through the following technical solutions: a filling device for automatically filling a knotted temporary plugging ball and a fracturing fluid into a well, which comprises a hollow shaft rotatably mounted in a machine platform, a driving mechanism for driving the hollow shaft to rotate is arranged between the hollow shaft and the machine platform, a turntable is welded to the upper end of the hollow shaft, a plurality of evenly distributed support seats are fixedly arranged on the outer edge of the turntable and along the circumferential direction of the turntable, a card slot is opened on the top surface of each support seat, and each support seat supports a temporary storage component for temporarily storing the knotted temporary plugging ball and the fracturing fluid;

[0014] The temporary storage assembly includes a temporary storage cylinder, a hydraulic motor is fixedly arranged on the outer cylindrical surface of the lower end of the temporary storage cylinder, the output shaft of the hydraulic motor is arranged downward, and a blocking plate for blocking the bottom port of the temporary storage cylinder is connected to the output shaft, a clamping block is fixedly arranged on the bottom surface of the blocking plate, and the clamping block is embedded in the clamping groove of the support seat; a connecting plate is welded on the outer cylindrical surface of the upper end of the temporary storage cylinder, and a vertically arranged square rod is welded on the connecting plate;

[0015] The filling device also includes a clamping and conveying mechanism for transferring the temporary storage component to the top of the blowout preventer, the clamping and conveying mechanism including an arch frame fixedly arranged on the bottom surface of the machine platform and located directly below the hollow shaft, a column welded on the arch frame, the column axially penetrates the hollow shaft upward, and a mounting plate is fixedly arranged on the extended end, a feed oil cylinder is fixedly arranged on the bottom surface of the mounting plate, a bracket is fixedly arranged on the action end of the piston rod of the feed oil cylinder, a lifting oil cylinder is fixedly arranged on the top surface of the bracket, the piston rod of the lifting oil cylinder penetrates the bracket downward, and a clamping oil cylinder is fixedly arranged on the extended end, and the clamping head of the clamping oil cylinder faces downward;

[0016] The left end portion of the bracket is provided with a discharging assembly for pressurizing the knot temporary plugging ball and the fracturing fluid in the temporary storage tube downward.

[0017] A bearing seat corresponding to the hollow shaft is fixedly arranged on the bottom surface of the machine platform, and the lower end of the hollow shaft is rotatably installed in the bearing seat.

[0018] The driving mechanism includes a driving motor fixed on the bottom surface of the machine platform and a driven gear welded on the outer cylindrical surface of the hollow shaft. The output shaft of the driving motor passes through the machine platform upward, and a driving gear is connected to the extended end, and the driving gear is meshed with the driven gear.

[0019] The unloading assembly includes a U-shaped frame welded to the left end of the bracket, a floating rod sliding through the bottom wall of the U-shaped frame, the floating rod is located on the left side of the clamping cylinder, the bottom end of the floating rod is connected to a push plate, and a rack is welded to the top of the floating rod. A self-locking motor is fixed on the left side wall of the U-shaped frame, and a driving gear is connected to the output shaft of the self-locking motor, and the driving gear is meshed with the rack.

[0020] A fixing plate is welded on the outer cylindrical surface of the temporary storage cylinder, and the hydraulic motor is installed on the bottom surface of the fixing plate.

[0021] The outer contour of the push plate matches the inner cavity of the temporary storage cylinder.

[0022] The clamping block matches with the clamping slot of the supporting seat.

[0023] The filling device also includes a controller, which is connected to the driving motor, the self-locking motor, the hydraulic motor, the feeding cylinder, the lifting cylinder and the clamping cylinder via a signal line.

[0024] A method for automatically injecting knotted temporary plugging balls and fracturing fluid into a well, comprising the following steps:

[0025] S1. The worker places the filling device on the right side of the blowout preventer; the worker puts the weighed and evenly mixed knot temporary plugging balls and fracturing fluid into the temporary storage tube from the top port of each temporary storage component; after the insertion, the temporary storage tubes of each temporary storage component are temporarily stored with the knot temporary plugging balls and fracturing fluid to be filled;

[0026] S2. Add knotted temporary plugging balls and fracturing fluid to the oil well for the first time. The specific operation steps are as follows:

[0027] S21, the worker controls the driving motor to start, the driving motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the hollow shaft to rotate around its own axis, the hollow shaft drives the turntable to rotate, the turntable drives the various temporary storage components thereon to rotate synchronously, when the turntable rotates to a set angle, the controller controls the driving motor to turn off, at this time, a temporary storage component on the turntable just enters the clamping position of the clamping and conveying mechanism, that is, the square rod of the temporary storage component is just under the clamping head of the clamping cylinder of the clamping and conveying mechanism;

[0028] S22, controlling the piston rod of the lifting cylinder of the clamping and conveying mechanism to extend downward, the lifting cylinder drives the clamping cylinder to move downward, and the clamping cylinder drives the chuck to move downward. When the piston rod of the lifting cylinder extends to the set stroke, the controller controls the lifting cylinder to close. At this time, the chuck of the clamping cylinder just fits on the outside of the square rod of the temporary storage component;

[0029] S23, controlling the clamping oil cylinder to start, the clamping oil cylinder drives the clamping head to close, and the clamping head clamps and fixes the square rod of the temporary storage component, thereby fixing the temporary storage component;

[0030] S24, control the piston rod of the lifting cylinder to retract upward, the piston rod drives the clamping cylinder to move upward, the clamping cylinder drives the temporary storage component to move upward, and at the same time, the card block of the temporary storage component gradually withdraws from the card slot of the support seat; when the piston rod of the lifting cylinder is fully retracted, the temporary storage component is lifted up;

[0031] S25, the piston rod of the feed cylinder of the control clamping and conveying mechanism extends to the left, the piston rod drives the bracket to move to the left, the bracket drives the lifting cylinder, the clamping cylinder, the temporary storage assembly and the unloading assembly to move to the left at the same time, when the piston rod of the feed cylinder is fully extended, the temporary storage assembly just moves to the top of the blowout preventer;

[0032] S26, controlling the hydraulic motor on the temporary storage assembly to start, and the output shaft of the hydraulic motor drives the plugging plate to rotate on the horizontal plane. When the plugging plate rotates 180 degrees, the controller controls the hydraulic motor to close. At this time, the bottom port of the temporary storage tube is no longer blocked by the plugging plate, and the knotted temporary plugging ball and fracturing fluid in the temporary storage tube gradually fall out from the bottom port of the temporary storage tube. The fallen knotted temporary plugging ball and fracturing fluid enter the blowout preventer, and then enter the oil well from the blowout preventer.

[0033] S27, the self-locking motor of the control unloading assembly is started, the self-locking motor drives the driving gear to rotate clockwise, the driving gear drives the rack to move downward, the rack drives the floating rod to move downward, the floating rod drives the push plate to move downward, the push plate enters the temporary storage cylinder of the temporary storage assembly, and applies pressure to the knot temporary plugging ball and fracturing fluid in the temporary storage cylinder. When the push plate moves to the lower end of the temporary storage cylinder, the knot temporary plugging ball and fracturing fluid in the temporary storage cylinder can be completely filled into the oil well, thereby finally realizing the first filling of the knot temporary plugging ball and fracturing fluid into the oil well;

[0034] S3, reset the temporary storage assembly after use: control the hydraulic motor on the temporary storage assembly to reverse, so that the blocking plate blocks the bottom port of the temporary storage cylinder again; then control the piston rod of the feed cylinder to retract to the right, and then control the piston rod of the lifting cylinder to extend downward, so that the block of the temporary storage assembly is embedded into the slot of the support seat again, and then control the clamping cylinder to close, and the clamping head of the clamping cylinder is separated from the square rod of the temporary storage assembly, so that the temporary storage assembly after use is reset;

[0035] S4. The worker repeats the operations of steps S2 to S3 to inject the knotted temporary plugging balls and fracturing fluid in the temporary storage tubes of each temporary storage component into the oil well in multiple times. The knotted temporary plugging balls injected into the oil well can seal cracks of different sizes.

[0036] The invention has the following advantages: greatly reducing the work intensity of workers and greatly improving the efficiency of temporary ball plugging and fracturing fluid injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the cylinder;

[0038] Figure 2 A schematic diagram of a plug sealing the bottom port of a cylinder;

[0039] Figure 3 A schematic diagram of lifting the cylinder to just above the blowout preventer located at the top of the oil well;

[0040] Figure 4 A schematic diagram of pulling out the plug from the bottom port of the cylinder;

[0041] Figure 5 It is a structural schematic diagram of the present invention;

[0042] Figure 6 It is a connection diagram of the hollow shaft, the turntable, the support seat and multiple temporary storage components;

[0043] Figure 7 It is a schematic diagram of the structure of the temporary storage component;

[0044] Figure 8 for Figure 7 The main cross-sectional diagram of

[0045] Fig. 9 It is a structural schematic diagram of the clamping and conveying mechanism;

[0046] Fig.10 It is a schematic diagram of the connection between the floating rod, the push plate and the rack;

[0047] Fig.11 for Fig.10 The main cross-sectional diagram of

[0048] Fig.12 It is a structural schematic diagram of the unloading component;

[0049] Fig.13 A schematic diagram of placing the machine of the present invention on the right side of the blowout preventer;

[0050] Fig.14 A schematic diagram of a clamping cylinder chuck sleeved on the outside of a square rod of a temporary storage assembly;

[0051] Fig.15 for Fig.14 A partial enlarged view of part A;

[0052] Fig.16 A schematic diagram of a clamping cylinder clamping and fixing a square rod of a temporary storage component;

[0053] Fig.17 A schematic diagram for lifting the temporary storage component;

[0054] Fig.18 A schematic diagram of the temporary storage assembly moving to the top of the blowout preventer;

[0055] Fig.19 It is a schematic diagram showing that the bottom port of the temporary storage cylinder is no longer blocked by the blocking plate;

[0056] Fig. 20 It is a schematic diagram of the push plate applying pressure to the knot temporary plugging ball and fracturing fluid in the temporary storage tube;

[0057] In the figure:

[0058] 1- cylinder, 2- plug, 3- oil well, 4- blowout preventer;

[0059] 5-machine table, 6-hollow shaft, 7-turntable, 8-support seat, 9-card slot, 10-temporary storage component, 11-temporary storage cylinder, 12-hydraulic motor, 13-blocking plate, 14-card block, 15-connecting plate, 16-square rod;

[0060] 17-clamping and conveying mechanism, 18-arch frame, 19-column, 20-feeding cylinder, 21-bracket, 22-lifting cylinder, 23-clamping cylinder, 24-chuck, 25-unloading assembly;

[0061] 26-driving motor, 27-driven gear, 28-driving gear, 29-U-shaped frame, 30-floating rod, 31-push plate, 32-rack, 33-self-locking motor, 34-driving gear. DETAILED DESCRIPTION

[0062] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0063] like Figure 5~Figure 12 As shown, a filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well comprises a hollow shaft 6 rotatably mounted in a machine platform 5, a driving mechanism for driving the hollow shaft 6 to rotate is arranged between the hollow shaft 6 and the machine platform 5, a bearing seat corresponding to the hollow shaft 6 is fixedly arranged on the bottom surface of the machine platform 5, the lower end of the hollow shaft 6 is rotatably mounted in the bearing seat, a turntable 7 is welded to the upper end of the hollow shaft 6, a plurality of evenly distributed support seats 8 are fixedly arranged on the outer edge of the turntable 7 and along the circumferential direction of the turntable 7, a card slot 9 is opened on the top surface of each support seat 8, and each support seat 8 supports a temporary storage component 10 for temporarily storing knotted temporary plugging balls and fracturing fluid.

[0064] The temporary storage assembly 10 includes a temporary storage tube 11, a hydraulic motor 12 is fixedly arranged on the outer cylindrical surface of the lower end of the temporary storage tube 11, the output shaft of the hydraulic motor 12 is arranged downward, and a blocking plate 13 is connected to the output shaft to block the bottom port of the temporary storage tube 11, a clamping block 14 is fixedly arranged on the bottom surface of the blocking plate 13, and the clamping block 14 is embedded in the clamping groove 9 of the support seat 8; a connecting plate 15 is welded on the outer cylindrical surface of the upper end of the temporary storage tube 11, and a vertically arranged square rod 16 is welded on the connecting plate 15; the clamping block 14 cooperates with the clamping groove 9 of the support seat 8, a fixing plate is welded on the outer cylindrical surface of the temporary storage tube 11, and the hydraulic motor 12 is installed on the bottom surface of the fixing plate.

[0065] The filling device also includes a clamping and conveying mechanism 17 for rotating the temporary storage assembly 10 to the top of the blowout preventer 4. The clamping and conveying mechanism 17 includes an arch frame 18 fixedly arranged on the bottom surface of the machine platform 5 and located directly below the hollow shaft 6, and a column 19 welded to the arch frame 18. The column 19 axially penetrates the hollow shaft 6 upward, and a mounting plate is fixedly arranged on the extended end. A feed cylinder 20 is fixedly arranged on the bottom surface of the mounting plate. A bracket 21 is fixedly arranged on the active end of the piston rod of the feed cylinder 20. A lifting cylinder 22 is fixedly arranged on the top surface of the bracket 21. The piston rod of the lifting cylinder 22 penetrates the bracket 21 downward, and a clamping cylinder 23 is fixedly arranged on the extended end, and the clamping head 24 of the clamping cylinder 23 faces downward.

[0066] A discharge assembly 25 for pressurizing the knotted temporary plugging ball and fracturing fluid in the temporary storage tube 11 downward is provided on the left end portion of the bracket 21. The discharge assembly 25 includes a U-shaped frame 29 welded to the left end portion of the bracket 21, and a floating rod 30 slidingly passing through the bottom wall of the U-shaped frame 29. The floating rod 30 is located on the left side of the clamping cylinder 23. A push plate 31 is connected to the bottom end of the floating rod 30. The outer contour of the push plate 31 matches the inner cavity of the temporary storage tube 11. A rack 32 is welded to the top of the floating rod 30. A self-locking motor 33 is fixedly provided on the left side wall of the U-shaped frame 29. A driving gear 34 is connected to the output shaft of the self-locking motor 33. The driving gear 34 meshes with the rack 32.

[0067] The driving mechanism includes a driving motor 26 fixed on the bottom surface of the machine table 5 and a driven gear 27 welded on the outer cylindrical surface of the hollow shaft 6. The output shaft of the driving motor 26 passes through the machine table 5, and a driving gear 28 is connected to the extended end, and the driving gear 28 is meshed with the driven gear 27.

[0068] The filling device also includes a controller, which is connected to the driving motor 26, the self-locking motor 33, the hydraulic motor 12, the feeding cylinder 20, the lifting cylinder 22 and the clamping cylinder 23 via signal lines.

[0069] A method for automatically injecting knotted temporary plugging balls and fracturing fluid into a well, comprising the following steps:

[0070] S1. The worker places the filling device 5 on the right side of the blowout preventer 4. Fig.13 As shown; workers put the weighed and evenly mixed knot temporary plugging balls and fracturing fluid into the temporary storage tube 11 from the top port of each temporary storage component 10; after the insertion, the temporary storage tube 11 of each temporary storage component 10 temporarily stores the knot temporary plugging balls and fracturing fluid to be filled;

[0071] S2, adding knotted temporary plugging balls and fracturing fluid to the oil well 3 for the first time, and the specific operation steps are as follows:

[0072] S21, the worker controls the driving motor 26 to start, the driving motor 26 drives the driving gear 28 to rotate, the driving gear 28 drives the driven gear 27 to rotate, the driven gear 27 drives the hollow shaft 6 to rotate around its own axis, the hollow shaft 6 drives the turntable 7 to rotate, the turntable 7 drives the various temporary storage components 10 thereon to rotate synchronously, when the turntable 7 rotates to the set angle, the controller controls the driving motor 26 to turn off, at this time, a temporary storage component 10 on the turntable 7 just enters the clamping position of the clamping and conveying mechanism 17, that is, the square rod 16 of the temporary storage component 10 is just below the clamping head 24 of the clamping cylinder 23 of the clamping and conveying mechanism 17;

[0073] S22, control the piston rod of the lifting cylinder 22 of the clamping and conveying mechanism 17 to extend downward, the lifting cylinder 22 drives the clamping cylinder 23 to move downward, and the clamping cylinder 23 drives the clamp 24 to move downward. When the piston rod of the lifting cylinder 22 extends to the set stroke, the controller controls the lifting cylinder 22 to close. At this time, the clamp 24 of the clamping cylinder 23 is just sleeved on the outside of the square rod 16 of the temporary storage component 10, as shown in FIG. Figure 14~Figure 15 As shown;

[0074] S23, control the clamping oil cylinder 23 to start, the clamping oil cylinder 23 drives the clamping head 24 to close, the clamping head 24 clamps and fixes the square rod 16 of the temporary storage component 10, and then fixes the temporary storage component 10, such as Fig.16 As shown;

[0075] S24, control the piston rod of the lifting cylinder 22 to retract upward, the piston rod drives the clamping cylinder 23 to move upward, the clamping cylinder 23 drives the temporary storage component 10 to move upward, and at the same time, the block 14 of the temporary storage component 10 gradually withdraws from the slot 9 of the support seat 8; when the piston rod of the lifting cylinder 22 is fully retracted, the temporary storage component 10 is lifted up, such as Fig.17 As shown;

[0076] S25, control the piston rod of the feed cylinder 20 of the clamping and conveying mechanism 17 to extend to the left, the piston rod drives the bracket 21 to move to the left, the bracket 21 drives the lifting cylinder 22, the clamping cylinder 23, the temporary storage assembly 10 and the unloading assembly 25 to move to the left at the same time, when the piston rod of the feed cylinder 20 is fully extended, the temporary storage assembly 10 just moves to the top of the blowout preventer 4, as shown in FIG. Fig.18 As shown;

[0077] S26, control the hydraulic motor 12 on the temporary storage assembly 10 to start, and the output shaft of the hydraulic motor 12 drives the blocking plate 13 to rotate on the horizontal plane. When the blocking plate 13 rotates 180 degrees, the controller controls the hydraulic motor 12 to close. At this time, the bottom port of the temporary storage tube 11 is no longer blocked by the blocking plate 13. Fig.19 As shown, the knotted temporary plugging ball and the fracturing fluid in the temporary storage tube 11 gradually fall out from the bottom port of the temporary storage tube 11, and the fallen knotted temporary plugging ball and the fracturing fluid enter the blowout preventer 4, and then enter the oil well from the blowout preventer 4;

[0078] S27, control the self-locking motor 33 of the unloading assembly 25 to start, the self-locking motor 33 drives the driving gear 34 to rotate clockwise, the driving gear 34 drives the rack 32 to move downward, the rack 32 drives the floating rod 30 to move downward, the floating rod 30 drives the push plate 31 to move downward, the push plate 31 enters the temporary storage tube 11 of the temporary storage assembly 10, and pressurizes the knot temporary plugging ball and the fracturing fluid in the temporary storage tube 11, such as Fig. 20As shown, when the push plate 31 moves to the lower end of the temporary storage tube 11, the knotted temporary plugging balls and fracturing fluid in the temporary storage tube 11 can be completely injected into the oil well 3, thereby finally realizing the first injection of the knotted temporary plugging balls and fracturing fluid into the oil well 3;

[0079] Among them, from step S2, only through the linkage cooperation of the temporary storage component 10 and the clamping and conveying mechanism 17, the knot temporary plugging ball and fracturing fluid in the temporary storage tube 11 of the temporary storage component 10 can be automatically injected into the oil well 3, compared with the Figure 1~Figure 4 The filling method shown does not require workers to first lift the cylinder 1 to the top of the blowout preventer 4 located at the top of the oil well 3, and then pull out the plug 2 from the bottom port of the cylinder 1 before filling the knotted plugging ball and fracturing fluid in the cylinder 1 into the oil well 3. Instead, the knotted plugging ball and fracturing fluid are automatically filled into the oil well 3, which not only greatly reduces the work intensity of the workers, but also shortens the filling time of the knotted plugging ball and fracturing fluid, thereby greatly improving the filling efficiency of the knotted plugging ball and fracturing fluid.

[0080] In addition, it can be seen from steps S26 to S27 that when the plugging plate 13 no longer blocks the bottom port of the temporary storage tube 11, it is only necessary to control the self-locking motor 33 of the unloading assembly 25 to start, so that the push plate 31 can squeeze the knotted temporary plugging balls and fracturing fluid in the temporary storage tube 11 downward along the axial direction of the temporary storage tube 11, thereby accelerating the discharge speed of the knotted temporary plugging balls and fracturing fluid in the temporary storage tube 11, and further realizing that the knotted temporary plugging balls and fracturing fluid in the temporary storage tube 11 are all filled into the oil well 3 in a short time. It can be seen that compared with the above, the filling device of the present invention is more convenient to use. Figure 1~Figure 4 The filling method shown does not need to rely on deadweight to discharge the knot temporary plugging balls and fracturing fluid, thereby greatly improving the filling efficiency of the knot temporary plugging balls and fracturing fluid.

[0081] S3, resetting the temporary storage assembly 10 after use: controlling the hydraulic motor 12 on the temporary storage assembly 10 to reverse, so that the blocking plate 13 blocks the bottom port of the temporary storage tube 11 again; then controlling the piston rod of the feed cylinder 20 to retract to the right, and then controlling the piston rod of the lifting cylinder 22 to extend downward, so that the block 14 of the temporary storage assembly 10 is embedded in the slot 9 of the support seat 8 again, and then controlling the clamping cylinder 23 to close, and the clamping head 24 of the clamping cylinder 23 is separated from the square rod 16 of the temporary storage assembly 10, so that the temporary storage assembly 10 after use is reset;

[0082] S4. The worker repeats the operations of steps S2 to S3 to inject the knotted temporary plugging balls and fracturing fluid in the temporary storage tubes 11 of each temporary storage assembly 10 into the oil well 3 in multiple times. The knotted temporary plugging balls injected into the oil well 3 can seal cracks of different sizes.

[0083] Finally, it should be noted that the above description 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 replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well, characterized in that: It comprises a hollow shaft (6) rotatably mounted in a machine platform (5), a driving mechanism for driving the hollow shaft (6) to rotate is arranged between the hollow shaft (6) and the machine platform (5), a turntable (7) is welded to the upper end of the hollow shaft (6), a plurality of evenly distributed support seats (8) are fixedly arranged on the outer edge of the turntable (7) and along the circumferential direction of the turntable (7), a slot (9) is provided on the top surface of each support seat (8), and each support seat (8) supports a temporary storage component (10) for temporarily storing a knotted temporary plugging ball and a fracturing fluid; The temporary storage assembly (10) comprises a temporary storage cylinder (11), a hydraulic motor (12) is fixedly arranged on the outer cylindrical surface of the lower end of the temporary storage cylinder (11), the output shaft of the hydraulic motor (12) is arranged downward, and a blocking plate (13) is connected to the output shaft to block the bottom port of the temporary storage cylinder (11), a clamping block (14) is fixedly arranged on the bottom surface of the blocking plate (13), and the clamping block (14) is embedded in the clamping groove (9) of the support seat (8); a connecting plate (15) is welded to the outer cylindrical surface of the upper end of the temporary storage cylinder (11), and a vertically arranged square rod (16) is welded to the connecting plate (15); The filling device also includes a clamping and conveying mechanism (17) for rotating the temporary storage component (10) to the top of the blowout preventer (4), the clamping and conveying mechanism (17) including an arch frame (18) fixedly mounted on the bottom surface of the machine platform (5) and located directly below the hollow shaft (6), and a column (19) welded to the arch frame (18), the column (19) axially penetrating the hollow shaft (6) upward, and a mounting plate fixedly mounted on the extended end, a feed cylinder (20) fixedly mounted on the bottom surface of the mounting plate, a bracket (21) fixedly mounted on the active end of the piston rod of the feed cylinder (20), a lifting cylinder (22) fixedly mounted on the top surface of the bracket (21), the piston rod of the lifting cylinder (22) penetrating the bracket (21) downward, and a clamping cylinder (23) fixedly mounted on the extended end, and a clamping head (24) of the clamping cylinder (23) facing downward; A discharge assembly (25) for pressurizing the knotted temporary plugging ball and fracturing fluid in the temporary storage tube (11) downward is provided on the left end portion of the bracket (21).

2. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 1, characterized in that: A bearing seat corresponding to the hollow shaft (6) is fixedly provided on the bottom surface of the machine platform (5), and the lower end of the hollow shaft (6) is rotatably mounted in the bearing seat.

3. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 2, characterized in that: The driving mechanism comprises a driving motor (26) fixedly mounted on the bottom surface of the machine platform (5), and a driven gear (27) welded to the outer cylindrical surface of the hollow shaft (6); the output shaft of the driving motor (26) passes through the machine platform (5) in an upward direction, and a driving gear (28) is connected to the extended end thereof, and the driving gear (28) is meshed with the driven gear (27).

4. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 3, characterized in that: The unloading assembly (25) comprises a U-shaped frame (29) welded to the left end of the bracket (21), and a floating rod (30) slidingly penetrating the bottom wall of the U-shaped frame (29); the floating rod (30) is located on the left side of the clamping cylinder (23); the bottom end of the floating rod (30) is connected to a push plate (31); the top of the floating rod (30) is welded to a rack (32); a self-locking motor (33) is fixedly provided on the left side wall of the U-shaped frame (29); a driving gear (34) is connected to the output shaft of the self-locking motor (33); and the driving gear (34) is meshed with the rack (32).

5. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 4, characterized in that: A fixing plate is welded on the outer cylindrical surface of the temporary storage cylinder (11), and the hydraulic motor (12) is mounted on the bottom surface of the fixing plate.

6. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 5, characterized in that: The outer contour of the push plate (31) matches the inner cavity of the temporary storage cylinder (11).

7. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 6, characterized in that: The clamping block (14) matches with the clamping slot (9) of the support seat (8).

8. The filling device for automatically filling knotted temporary plugging balls and fracturing fluid into a well according to claim 7, characterized in that: The filling device also includes a controller, which is connected to the drive motor (26), the self-locking motor (33), the hydraulic motor (12), the feed cylinder (20), the lifting cylinder (22), and the clamping cylinder (23) via a signal line.

9. A method for automatically filling a knotted temporary plugging ball and a fracturing fluid into a well, using the filling device for automatically filling a knotted temporary plugging ball and a fracturing fluid into a well as claimed in claim 8, characterized in that: It includes the following steps: S1. A worker places the machine platform (5) of the filling device on the right side of the blowout preventer (4); the worker puts the pre-weighed and evenly mixed rope knot temporary plugging balls and fracturing fluid into the temporary storage tube (11) from the top port of the temporary storage tube (11) of each temporary storage component (10); after the putting, the temporary storage tube (11) of each temporary storage component (10) temporarily stores the rope knot temporary plugging balls and fracturing fluid to be filled; S2, injecting knotted temporary plugging balls and fracturing fluid into the oil well (3) for the first time, the specific operation steps are as follows: S21, the worker controls the drive motor (26) to start, the drive motor (26) drives the driving gear (28) to rotate, the driving gear (28) drives the driven gear (27) to rotate, the driven gear (27) drives the hollow shaft (6) to rotate around its own axis, the hollow shaft (6) drives the turntable (7) to rotate, the turntable (7) drives each temporary storage component (10) thereon to rotate synchronously, when the turntable (7) rotates to a set angle, the controller controls the drive motor (26) to turn off, at this time, a temporary storage component (10) on the turntable (7) just enters the clamping position of the clamping and conveying mechanism (17), that is, the square rod (16) of the temporary storage component (10) is just below the clamping head (24) of the clamping cylinder (23) of the clamping and conveying mechanism (17); S22, controlling the piston rod of the lifting cylinder (22) of the clamping and conveying mechanism (17) to extend downward, the lifting cylinder (22) drives the clamping cylinder (23) to move downward, and the clamping cylinder (23) drives the clamping head (24) to move downward. When the piston rod of the lifting cylinder (22) extends to a set stroke, the controller controls the lifting cylinder (22) to close. At this time, the clamping head (24) of the clamping cylinder (23) is just sleeved on the outside of the square rod (16) of the temporary storage component (10); S23, controlling the clamping oil cylinder (23) to start, the clamping oil cylinder (23) drives the clamping head (24) to close, and the clamping head (24) clamps and fixes the square rod (16) of the temporary storage component (10), thereby fixing the temporary storage component (10); S24, controlling the piston rod of the lifting cylinder (22) to retract upward, the piston rod drives the clamping cylinder (23) to move upward, the clamping cylinder (23) drives the temporary storage component (10) to move upward, and at the same time, the clamping block (14) of the temporary storage component (10) gradually withdraws from the clamping groove (9) of the support seat (8); when the piston rod of the lifting cylinder (22) is completely retracted, the temporary storage component (10) is lifted up; S25, controlling the piston rod of the feed cylinder (20) of the clamping and conveying mechanism (17) to extend to the left, the piston rod drives the bracket (21) to move to the left, the bracket (21) drives the lifting cylinder (22), the clamping cylinder (23), the temporary storage assembly (10) and the unloading assembly (25) to move to the left at the same time, and when the piston rod of the feed cylinder (20) is fully extended, the temporary storage assembly (10) moves just above the blowout preventer (4); S26, controlling the hydraulic motor (12) on the temporary storage assembly (10) to start, and the output shaft of the hydraulic motor (12) drives the plugging plate (13) to rotate on the horizontal plane. When the plugging plate (13) rotates 180 degrees, the controller controls the hydraulic motor (12) to close. At this time, the bottom port of the temporary storage tube (11) is no longer blocked by the plugging plate (13), and the knotted temporary plugging ball and fracturing fluid in the temporary storage tube (11) gradually fall out from the bottom port of the temporary storage tube (11). The fallen knotted temporary plugging ball and fracturing fluid enter the blowout preventer (4), and then enter the oil well from the blowout preventer (4); S27, the self-locking motor (33) of the control unloading component (25) is started, the self-locking motor (33) drives the driving gear (34) to rotate clockwise, the driving gear (34) drives the rack (32) to move downward, the rack (32) drives the floating rod (30) to move downward, the floating rod (30) drives the push plate (31) to move downward, the push plate (31) enters the temporary storage tube (11) of the temporary storage component (10), and applies pressure to the knotted temporary plugging ball and the fracturing fluid in the temporary storage tube (11), when the push plate (31) moves to the lower end of the temporary storage tube (11), the knotted temporary plugging ball and the fracturing fluid in the temporary storage tube (11) can be completely injected into the oil well (3), thereby finally realizing the first injection of the knotted temporary plugging ball and the fracturing fluid into the oil well (3); S3, resetting the temporary storage assembly (10) after use: controlling the hydraulic motor (12) on the temporary storage assembly (10) to reverse, so that the blocking plate (13) blocks the bottom port of the temporary storage tube (11) again; then controlling the piston rod of the feed cylinder (20) to retract to the right, and then controlling the piston rod of the lifting cylinder (22) to extend downward, so that the block (14) of the temporary storage assembly (10) is again embedded in the groove (9) of the support seat (8), and then controlling the clamping cylinder (23) to close, so that the clamping head (24) of the clamping cylinder (23) is separated from the square rod (16) of the temporary storage assembly (10), thereby resetting the temporary storage assembly (10) after use; S4. The worker repeats the operations of steps S2 to S3 in this way, and the knotted temporary plugging balls and fracturing fluid in the temporary storage tubes (11) of the temporary storage components (10) are injected into the oil well (3) in multiple times. The knotted temporary plugging balls injected into the oil well (3) can seal cracks of different sizes.

Images