A cylindrical navigation shuttle well mouth automatic delivery system

Abstract

The present application relates to a kind of wellhead automatic delivery device of horizontal well staged fracturing, especially a kind of system for automatically delivering cylindrical navigation shuttle at wellhead when shale gas staged fracturing, which is composed of navigation shuttle wellhead automatic delivery device, upper gate valve assembly, manual pressure relief valve, lower gate valve assembly, hydraulic pressure relief valve and four-way, navigation shuttle wellhead automatic delivery device is arranged at the top, and the lower end of lower gate valve assembly is fixedly connected with wellhead device through flange.The system has high degree of automation, and through controlling the rotation of stepper motor, while cooperating the combined action of gate valve and pressure relief valve, the automatic delivery work of navigation shuttle can be realized.The falling direction is stable, and through arranging guide rib plate, it is ensured that the falling direction of cylindrical navigation shuttle sharp head structure in front cannot be turned over.The working efficiency is high, navigation shuttle slides along the curved surface formed by the fastest curve, which can ensure the shortest sliding time of navigation shuttle, and has the advantages of small impact load, good safety and stability, etc.

Description

Technical Field

[0001] The patent of the present invention relates to an automatic wellhead delivery device for staged fracturing of horizontal wells, and in particular to a system for automatically delivering a cylindrical navigation shuttle at the wellhead during staged fracturing of shale gas. Background Art

[0002] Against the backdrop of China's strong national advocacy for low-carbon, green energy, my country's unconventional oil and gas (shale gas, tight oil, tight sandstone gas, etc.) production is rapidly developing. Horizontal well staged fracturing technology has become an effective means of developing tight oil and gas reservoirs. Ball-drop fracturing is a commonly used fracturing technique for staged fracturing in horizontal wells. It relies on dropping fracturing balls at the wellhead and opening fracturing sleeves at the bottom of the well to perform step-by-step fracturing. Therefore, wellhead placement equipment is crucial. Shale gas reservoirs differ from conventional oil and gas reservoirs in that they are mostly shale, with low porosity and low permeability, or even ultra-low porosity and ultra-low permeability. To effectively develop shale gas resources, long horizontal wells, reaching lengths of over a thousand meters, are often used, and large-scale fracturing is employed to stimulate production. With the advancement of shale gas staged fracturing technology in areas such as Fuling, cylindrical navigation shuttles have gradually replaced spherical fracturing balls as a key tool for opening fracturing sleeves at the bottom of the well. For cylindrical navigation shuttles, the current main method is to manually release them one by one at the wellhead. Since there is a high pressure of up to 105MPa in the wellbore during fracturing construction, the manual release of cylindrical navigation shuttles has problems such as complex operation, low work efficiency, and high risk factor. There is an urgent need to design an automatic wellhead release device for cylindrical navigation shuttles. Current design schemes for automatic wellhead delivery devices, such as the rotary disc-type automatic ball delivery equipment for tight oil and gas reservoirs disclosed in patent CN201910011109.8, the double-barrel hydraulic cylinder ball delivery device for horizontal well fracturing disclosed in patent CN201621117736.8, and the automatic ball delivery device for horizontal well staged fracturing disclosed in patent CN201610148007.7, mainly realize the automatic delivery of spherical fracturing balls. The spherical fracturing balls can be dropped by rolling and have no requirements on the falling direction, while the cylindrical navigation shuttle can only be dropped by sliding. At the same time, due to the pointed structure of the navigation shuttle, it is necessary to ensure that the pointed structure of the cylindrical navigation shuttle cannot flip in the falling direction. In addition, the current design schemes for automatic wellhead delivery devices do not consider the impact of the high-pressure environment of the wellbore on the delivery device, and cannot meet the high-pressure environment requirements of shale gas staged fracturing. Summary of the Invention

[0003] The present invention aims to overcome the above-mentioned defects of existing automatic wellhead delivery devices and proposes a cylindrical navigation shuttle automatic wellhead delivery system. This system can replace similar products currently patented and meet the demand for automatic delivery of cylindrical navigation shuttles at the wellhead during shale gas staged fracturing. The technical solution adopted is as follows:

[0004] The cylindrical navigation shuttle wellhead automatic delivery system involved in the present invention is mainly composed of a navigation shuttle wellhead automatic delivery device, an upper gate valve assembly, a manual pressure relief valve, a lower gate valve assembly, a hydraulic pressure relief valve and a four-way valve. The navigation shuttle wellhead automatic delivery device is composed of fastening bolts, an upper top cover, stud bolts, a main body shell, a stepping motor, a delivery device lower flange, an infrared sensor, a base, a small gear, a navigation shuttle, a large gear, a ball storage barrel, a rotating pin shaft, a ball delivery hole, an infrared sensor mounting hole, a guide rib plate, a base through hole, a ball storage hole and a blind hole. The upper gate valve assembly is composed of the upper gate valve right gate, the upper gate valve The right hydraulic cylinder, the right cover of the upper gate valve, the left cover of the upper gate valve, the left hydraulic cylinder of the upper gate valve, the left gate of the upper gate valve, the upper gate valve body, the right valve stem of the upper gate valve and the left valve stem of the upper gate valve are composed of the manual pressure relief valve body and the manual pressure relief valve handwheel. The lower gate valve assembly is composed of the right cover of the lower gate valve, the right hydraulic cylinder of the lower gate valve, the right gate of the lower gate valve, the left gate of the lower gate valve, the left hydraulic cylinder of the lower gate valve, the left cover of the lower gate valve, the right valve stem of the lower gate valve, the valve body of the lower gate valve and the left valve stem of the lower gate valve. The hydraulic pressure relief valve is composed of the hydraulic pressure relief valve stem and the hydraulic pressure relief valve hydraulic cylinder.

[0005] The automatic wellhead delivery device of the navigation shuttle is arranged at the top. The lower end of the automatic wellhead delivery device of the navigation shuttle is fixedly connected to the upper end of the upper gate valve assembly through a flange, the lower end of the upper gate valve assembly is fixedly connected to the upper through pipe of the four-way through a flange, the right through pipe of the four-way through is fixedly connected to the left end of the manual pressure relief valve through a flange, the left through pipe of the four-way through is fixedly connected to the right end of the hydraulic pressure relief valve through a flange, the lower through pipe of the four-way through is fixedly connected to the upper end of the lower gate valve assembly through a flange, and the lower end of the lower gate valve assembly is fixedly connected to the wellhead device through a flange.

[0006] The cam is fixedly connected to the upper end of the gear train by a threaded connection, and the cam is fixedly connected to the gear train by a threaded connection, and the cam is fixedly connected to the gear train by a threaded connection.

[0007] In particular, the outer diameters of the navigation shuttle, the ball storage hole and the ball throwing hole are equal, the distance between the ball storage hole and the central axis of the rotating pin shaft is equal to the distance between the ball throwing hole and the central axis of the rotating pin shaft. When the large gear rotates to the concentric position of the ball storage hole and the ball throwing hole, the navigation shuttle passes through the ball throwing hole and falls from the ball storage hole into the base.

[0008] In particular, the middle part of the base is a curved shell formed by rotating the fastest curve along the central axis. At the same time, two guide ribs are arranged directly below the ball throwing hole. The distance between the two guide ribs is equal to the outer diameter of the navigation shuttle. After the navigation shuttle falls from the ball throwing hole, it slides along the guide ribs into the bottom of the base and continues to fall through the through hole of the base.

[0009] In the upper gate valve assembly, the upper end of the upper gate valve body is fixedly connected to the lower flange in the navigation shuttle wellhead automatic delivery device through a flange, the right end of the upper gate valve body is fixedly connected to the left end of the right hydraulic cylinder of the upper gate valve through a flange, the right end of the right hydraulic cylinder of the upper gate valve is fixedly connected to the right cover of the upper gate valve through a fastening screw, the right end of the right valve stem of the upper gate valve is coaxially matched with the right hydraulic cylinder of the upper gate valve, and the left end of the right valve stem of the upper gate valve is fixedly connected to the right end of the right gate plate of the upper gate valve through a thread. Similarly, the left end of the upper gate valve body is fixedly connected to the right end of the left hydraulic cylinder of the upper gate valve through a flange, the left end of the left hydraulic cylinder of the upper gate valve is fixedly connected to the left cover of the upper gate valve through a fastening screw, the left end of the left valve stem of the upper gate valve is coaxially matched with the left hydraulic cylinder of the upper gate valve, and the right end of the left valve stem of the upper gate valve is fixedly connected to the left end of the left gate plate of the upper gate valve through a thread.

[0010] In the manual pressure relief valve, the left end of the manual pressure relief valve body is fixedly connected to the right through pipe of the four-way valve through a flange, the manual pressure relief valve body is coaxially matched with the manual pressure relief valve stem, the right end of the manual pressure relief valve stem is fixedly connected to the manual pressure relief valve handwheel, and the right end of the manual pressure relief valve body is threadedly matched with the manual pressure relief valve handwheel.

[0011] In the lower gate valve assembly, the upper end of the lower gate valve body is fixedly connected to the lower through-pipe of the four-way through a flange, the right end of the lower gate valve body is fixedly connected to the left end of the right hydraulic cylinder of the lower gate valve through a flange, the right end of the right hydraulic cylinder of the lower gate valve is fixedly connected to the right cover of the lower gate valve through a fastening screw, the right end of the right valve stem of the lower gate valve is coaxially matched with the right hydraulic cylinder of the lower gate valve, and the left end of the right valve stem of the lower gate valve is fixedly connected to the right end of the right gate plate of the lower gate valve through a thread. Similarly, the left end of the lower gate valve body is fixedly connected to the right end of the left hydraulic cylinder of the lower gate valve through a flange, the left end of the left hydraulic cylinder of the lower gate valve is fixedly connected to the left cover of the lower gate valve through a fastening screw, the left end of the left valve stem of the lower gate valve is coaxially matched with the left hydraulic cylinder of the lower gate valve, and the right end of the left valve stem of the lower gate valve is fixedly connected to the left end of the left gate plate of the lower gate valve through a thread.

[0012] In the hydraulic pressure relief valve, the right end of the hydraulic cylinder of the hydraulic pressure relief valve is fixedly connected to the left through pipe of the four-way valve via a flange, and the hydraulic cylinder of the hydraulic pressure relief valve is coaxially matched with the valve stem of the hydraulic pressure relief valve.

[0013] The present invention has the following advantages: a cylindrical navigation shuttle automatic wellhead deployment system that can automatically deploy a cylindrical navigation shuttle in a high-pressure wellbore environment. It features a high degree of automation, achieving automatic deployment of the navigation shuttle by controlling the rotation of a stepper motor and coordinating the operation of a gate valve and a pressure relief valve. The system also provides a stable descent direction, with guide ribs ensuring that the cylindrical navigation shuttle's pointed structure does not flip in the forward direction of descent. It also offers high efficiency, with the shuttle sliding along the curved surface formed by the velocity curve, minimizing the shuttle's descent time and improving efficiency. It also provides low impact load, with the shuttle sliding along the curved surface formed by the velocity curve, reducing the shuttle's initial vertical velocity upon reaching the bottom, thereby minimizing impact on the gate of the upper gate valve assembly. It also offers excellent safety and stability, with the combined operation of the upper gate valve assembly, lower gate valve assembly, and hydraulic actuator to isolate the wellbore from the high-pressure environment, thereby preventing damage to the navigation shuttle automatic wellhead deployment device above due to the high pressure, thereby improving the system's safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : The overall structure of a cylindrical navigation shuttle wellhead automatic delivery system.

[0015] Figure 2 : The overall structure of the navigation shuttle wellhead automatic delivery device.

[0016] Figure 3 : Cross-sectional structure of the navigation shuttle wellhead automatic delivery device.

[0017] Figure 4 : The overall structure of the base of the navigation shuttle wellhead automatic delivery device.

[0018] Figure 5 : The internal structure of the base of the automatic wellhead delivery device of the navigation shuttle.

[0019] Figure 6 : The internal structure of the automatic wellhead delivery device of the navigation shuttle.

[0020] Figure 7 : The internal structure of a cylindrical navigation shuttle wellhead automatic delivery system.

[0021] Figure 8 : The internal structure of the valve body of a cylindrical navigation shuttle wellhead automatic delivery system.

[0022] Explanation of symbols:

[0023] 1. Automatic wellhead delivery device for the navigation shuttle; 1.1. Fastening bolts; 1.2. Upper cover; 1.3. Stud bolts; 1.4. Main housing; 1.5. Stepper motor; 1.6. Lower flange of the delivery device; 1.7. Infrared sensor; 1.8. Base; 1.9. Small gear; 1.10. Navigation shuttle; 1.11. Large gear; 1.12. Ball storage cylinder; 1.13. Rotating pin; 1.14. Ball delivery hole; 1.15. Mounting hole for infrared sensor; 1.16. Guide rib; 1.17. Base through hole; 1.18. Ball storage hole; 1.19. Blind hole; 2. Upper gate valve assembly; 2.1. Right gate of the upper gate valve; 2.2. Right hydraulic cylinder of the upper gate valve; 2.3. Right cover of the upper gate valve; 2.4. Left cover of the upper gate valve ;2.5. Upper gate valve left hydraulic cylinder;2.6. Upper gate valve left gate;2.7. Upper gate valve body;2.8. Upper gate valve right stem;2.9. Upper gate valve left stem;3. Manual pressure relief valve;3.1. Manual pressure relief valve body;3.2. Manual pressure relief valve handwheel;4. Lower gate valve assembly;4.1. Lower gate valve right cover;4.2. Lower gate valve right hydraulic cylinder;4.3. Lower gate valve right gate;4.4. Lower gate valve left gate;4.5. Lower gate valve left hydraulic cylinder;4.6. Lower gate valve left cover;4.7. Lower gate valve right stem;4.8. Lower gate valve body;4.9. Lower gate valve left stem;5. Hydraulic pressure relief valve;5.1. Hydraulic pressure relief valve stem;5.2. Hydraulic pressure relief valve hydraulic cylinder. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and examples:

[0025] like Figures 1-8As shown, the cylindrical navigation shuttle wellhead automatic delivery system designed by the present invention is mainly composed of a navigation shuttle wellhead automatic delivery device 1, an upper gate valve assembly 2, a manual pressure relief valve 3, a lower gate valve assembly 4, a hydraulic pressure relief valve 5 and a four-way valve 6. The navigation shuttle wellhead automatic delivery device 1 is composed of a fastening bolt 1.1, an upper top cover 1.2, a stud bolt 1.3, a main body shell 1.4, a stepping motor 1.5, a delivery device lower flange 1.6, an infrared sensor 1.7, a base 1.8, a small gear 1.9, a navigation shuttle 1.10, a large gear 1.11, a ball storage cylinder 1.12, a rotating pin 1.13, a ball delivery hole 1.14, an infrared sensor mounting hole 1.15, a guide rib 1.16, a base through hole 1.17, a ball storage hole 1.18 and a blind hole 1.19. The upper gate valve assembly 2 is composed of the upper gate valve right gate 2 .1, the upper gate valve right hydraulic cylinder 2.2, the upper gate valve right cover 2.3, the upper gate valve left cover 2.4, the upper gate valve left hydraulic cylinder 2.5, the upper gate valve left gate 2.6, the upper gate valve body 2.7, the upper gate valve right valve stem 2.8 and the upper gate valve left valve stem 2.9. The manual pressure relief valve 3 is composed of the manual pressure relief valve body 3.1 and the manual pressure relief valve handwheel 3.2. The lower gate valve assembly 4 is composed of The lower gate valve is composed of a right cover 4.1, a right hydraulic cylinder 4.2, a right gate 4.3, a left gate 4.4, a left hydraulic cylinder 4.5, a left cover 4.6, a right valve stem 4.7, a valve body 4.8 and a left valve stem 4.9. The hydraulic pressure relief valve 5 is composed of a hydraulic pressure relief valve stem 5.1 and a hydraulic cylinder 5.2. The navigation shuttle wellhead automatic delivery device 1 is arranged at the top, and the lower end of the navigation shuttle wellhead automatic delivery device 1 is fixedly connected to the upper end of the upper gate valve assembly 2 by a flange, the lower end of the upper gate valve assembly 2 is fixedly connected to the upper through pipe of the four-way 6 by a flange, the right through pipe of the four-way 6 is fixedly connected to the left end of the manual pressure relief valve 3 by a flange, the left through pipe of the four-way 6 is fixedly connected to the right end of the hydraulic pressure relief valve 5 by a flange, the lower through pipe of the four-way 6 is fixedly connected to the upper end of the lower gate valve assembly 4 by a flange, and the lower end of the lower gate valve assembly 4 is fixedly connected to the wellhead device by a flange.

[0026] In the automatic delivery device 1 for the navigation shuttle wellhead, the upper cover 1.2 is fixedly connected to the upper flange of the main shell 1.4 by fastening bolts 1.1 and stud bolts 1.3. The lower end of the main shell 1.4 is fixedly connected to the upper end of the base 1.8 by a flange. The lower end of the base 1.8 is fixedly connected to the lower flange 1.6 of the delivery device by welding. The lower flange 1.6 is fixedly connected to the upper end of the upper gate valve assembly 2 by a flange. An infrared sensor mounting hole 1.15 is arranged in the middle of the base 1.8. The infrared sensor mounting hole 1.15 is fixedly connected to the infrared sensor 1.7 by threaded fit. The stepper motor 1.5 is fixedly connected to the upper flange of the main shell 1.4 by fastening screws. Fixed connection, the stepper motor 1.5 and the small gear 1.9 are coaxially fixedly connected by a key, the small gear 1.9 and the large gear 1.11 realize gear matching, the upper end face of the large gear 1.11 and the lower end face of the ball storage barrel 1.12 are fixedly connected by welding, and a plurality of ball storage holes 1.18 and a blind hole 1.19 are evenly arranged around the end face of the ball storage barrel 1.12, and a single navigation shuttle 1.10 is arranged inside each ball storage hole 1.18, and the lower end of the rotating pin shaft 1.13 is fixedly connected to the upper top plate of the base 1.8 by welding, and the rotating pin shaft 1.13 and the center hole of the large gear 1.11 realize coaxial rotation matching, and a single ball throwing hole 1.14 is arranged around the upper top plate of the base 1.8.

[0027] In particular, the outer diameters of the navigation shuttle 1.10, the ball storage hole 1.18 and the ball throwing hole 1.14 are equal, and the distance between the ball storage hole 1.18 and the center axis of the rotating pin 1.13 is equal to the distance between the ball throwing hole 1.14 and the center axis of the rotating pin 1.13. When the large gear rotates to the concentric position of the ball storage hole 1.18 and the ball throwing hole 1.14, the navigation shuttle 1.10 passes through the ball throwing hole 1.14 and falls from the ball storage hole 1.18 into the base 1.8.

[0028] In particular, the middle part of the base 1.8 is a curved shell formed by rotating the fastest curve along the central axis. At the same time, two guide ribs 1.16 are arranged directly below the pitching hole 1.14. The distance between the two guide ribs 1.16 is equal to the outer diameter of the navigation shuttle 1.10. After the navigation shuttle 1.10 falls from the pitching hole 1.14, it slides into the bottom of the base 1.8 along the guide ribs 1.16 and continues to fall through the base through hole 1.17.

[0029] In the upper gate valve assembly 2, the upper end of the upper gate valve body 2.7 is fixedly connected to the lower flange 1.6 in the navigation shuttle wellhead automatic delivery device 1 through a flange, the right end of the upper gate valve body 2.7 is fixedly connected to the left end of the upper gate valve right hydraulic cylinder 2.2 through a flange, the right end of the upper gate valve right hydraulic cylinder 2.2 is fixedly connected to the upper gate valve right cover 2.3 through a fastening screw, the right end of the upper gate valve right valve stem 2.8 is coaxially matched with the upper gate valve right hydraulic cylinder 2.2, and the upper gate valve right valve stem 2. 8 The left end is fixedly connected to the right end of the right gate plate 2.1 of the upper gate valve by means of threads. Similarly, the left end of the upper gate valve body 2.7 is fixedly connected to the right end of the left hydraulic cylinder 2.5 of the upper gate valve by means of a flange. The left end of the left hydraulic cylinder 2.5 of the upper gate valve is fixedly connected to the left cover 2.4 of the upper gate valve by means of fastening screws. The left end of the left valve stem 2.9 of the upper gate valve is coaxially matched with the left hydraulic cylinder 2.5 of the upper gate valve. The right end of the left valve stem 2.9 of the upper gate valve is fixedly connected to the left end of the left gate plate 2.6 of the upper gate valve by means of threads.

[0030] In the manual pressure relief valve 3, the left end of the manual pressure relief valve body 3.1 is fixedly connected to the right through pipe of the four-way valve 6 through a flange, the manual pressure relief valve body 3.1 is coaxially matched with the manual pressure relief valve stem, the right end of the manual pressure relief valve stem is fixedly connected to the manual pressure relief valve handwheel 3.2, and the right end of the manual pressure relief valve body 3.1 is threadedly matched with the manual pressure relief valve handwheel 3.2.

[0031] In the lower gate valve assembly 4, the upper end of the lower gate valve body 4.8 is fixedly connected to the lower through pipe of the four-way 6 by a flange, the right end of the lower gate valve body 4.8 is fixedly connected to the left end of the lower gate valve right hydraulic cylinder 4.2 by a flange, the right end of the lower gate valve right hydraulic cylinder 4.2 is fixedly connected to the right cover 4.1 of the lower gate valve by fastening screws, the right end of the lower gate valve right valve stem 4.7 is coaxial with the lower gate valve right hydraulic cylinder 4.2, and the left end of the lower gate valve right valve stem 4.7 is fixedly connected to the lower gate valve. The right end of the right gate disc 4.3 is fixedly connected by threads. Similarly, the left end of the lower gate valve body 4.8 is fixedly connected to the right end of the left hydraulic cylinder 4.5 of the lower gate valve by a flange. The left end of the left hydraulic cylinder 4.5 of the lower gate valve is fixedly connected to the left cover 4.6 of the lower gate valve by fastening screws. The left end of the left valve stem 4.9 of the lower gate valve is coaxially matched with the left hydraulic cylinder 4.5 of the lower gate valve, and the right end of the left valve stem 4.9 of the lower gate valve is fixedly connected to the left end of the left gate disc 4.4 of the lower gate valve by threads.

[0032] In the hydraulic pressure relief valve 5, the right end of the hydraulic pressure relief valve cylinder 5.2 is fixedly connected to the left passage of the cross-connection 6 via a flange, and the hydraulic pressure relief valve cylinder 5.2 is coaxially matched with the hydraulic pressure relief valve stem 5.1.

[0033] The working process of a cylindrical navigation shuttle wellhead automatic delivery system is as follows: in the initial state, the navigation shuttle 1.10 is installed inside the ball storage hole 1.18 on the end face of the ball storage cylinder 1.12, the blind hole 1.19 is aligned with the ball delivery hole 1.14, and the upper gate valve assembly 2, the manual pressure relief valve 3, the lower gate valve assembly 4 and the hydraulic pressure relief valve 5 are all in the closed state, and it is in the ball delivery preparation stage.

[0034] When pitching begins, stepper motor 1.5 drives pinion 1.9, which in turn rotates gear 1.11. This in turn drives ball storage barrel 1.12 and all navigation shuttles 1.10. When the first ball storage hole 1.18 aligns concentrically with pitching hole 1.14, gravity forces the navigation shuttle 1.10 inside storage hole 1.18 through pitching hole 1.14 and begins to descend. After landing on base 1.8, the shuttle 1.10 follows the curved surface formed by the brachistochrone curve in the middle of base 1.8, slides along guide ribs 1.16, and finally, through base through-hole 1.17, continuing its descent. When the shuttle 1.10 enters upper gate valve assembly 2, it initially lands above the gate of the upper gate valve assembly 2, as it is closed. The gate of the upper gate valve assembly 2 is then opened through hydraulic control, and the navigation shuttle 1.10 continues to fall above the gate of the lower gate valve assembly 4. The gate of the upper gate valve assembly 2 is then closed through hydraulic control to prevent the high-pressure fracturing fluid in the wellbore from entering the navigation shuttle wellhead automatic delivery device 1. Next, the gate of the lower gate valve assembly 4 is opened through hydraulic control, and the navigation shuttle 1.10 falls into the wellbore under the action of gravity. Finally, the gate of the lower gate valve assembly 4 is closed through hydraulic control, and the hydraulic pressure relief valve 5 is opened through hydraulic control to relieve pressure. When the hydraulic pressure relief valve 5 fails, it is necessary to relieve pressure through the manual pressure relief valve 3, and finally the delivery of a single navigation shuttle 1.10 is completed.

[0035] When it is necessary to continue pitching, the stepper motor 1.5 continues to drive the small gear 1.9 to drive the large gear 1.11 to rotate. At this time, the large gear 1.11 continues to drive the ball storage barrel 1.12 to rotate. When the next ball storage hole 1.18 is concentrically aligned with the pitching hole 1.14, the above process is repeated to complete the delivery of the next navigation shuttle 1.10.

[0036] The present invention has been described above by way of examples, but the present invention is not limited to the above specific embodiments. Any changes or modifications based on the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cylindrical navigation shuttle automatic wellhead delivery system, characterized by: A cylindrical navigation shuttle wellhead automatic delivery system mainly consists of a navigation shuttle wellhead automatic delivery device, an upper gate valve assembly, a manual pressure relief valve, a lower gate valve assembly, a hydraulic pressure relief valve and a four-way valve. The navigation shuttle wellhead automatic delivery device consists of a fastening bolt, an upper cover, stud bolts, a main body shell, a stepping motor, a delivery device lower flange, an infrared sensor, a base, a small gear, a navigation shuttle, a large gear, a ball storage barrel, a rotating pin shaft, a ball delivery hole, an infrared sensor mounting hole, a guide rib plate, a base through hole, a ball storage hole and a blind hole. The upper gate valve assembly consists of the upper gate valve right gate, the upper gate valve right hydraulic The manual pressure relief valve is composed of the manual pressure relief valve body and the manual pressure relief valve handwheel. The lower gate valve assembly is composed of the lower gate valve right cover, the lower gate valve right hydraulic cylinder, the lower gate valve right gate, the lower gate valve left cover, the upper gate valve left hydraulic cylinder, the upper gate valve left gate, the upper gate valve body, the upper gate valve right valve stem and the upper gate valve left valve stem. The hydraulic pressure relief valve is composed of the hydraulic pressure relief valve stem and the hydraulic pressure relief valve hydraulic cylinder. The navigation shuttle wellhead automatic delivery device is arranged at the top. The lower end of the navigation shuttle wellhead automatic delivery device is fixedly connected to the upper end of the upper gate valve assembly through a flange. The lower end of the upper gate valve assembly is fixedly connected to the upper through-pipe of the four-way through-pipe through a flange. The right through-pipe of the four-way through-pipe is fixedly connected to the left end of the manual pressure relief valve through a flange. The left through-pipe of the four-way through-pipe is fixedly connected to the right end of the hydraulic pressure relief valve through a flange. The lower through-pipe of the four-way through-pipe is fixedly connected to the upper end of the lower gate valve assembly through a flange. The lower end of the lower gate valve assembly is fixedly connected to the wellhead device through a flange. The cam is fixedly connected to the upper end of the gear train by a plurality of screw threads, and the cam is fixedly connected to the gear train by a plurality of screw threads, and the cam is fixedly connected to the gear train by a plurality of screw threads. The middle part of the base is a curved shell formed by rotating the brachistochrone curve along the central axis. Two guide ribs are placed directly below the ball-dropping hole. The distance between the two guide ribs is equal to the outer diameter of the navigation shuttle. After the navigation shuttle drops from the ball-dropping hole, it slides along the guide ribs into the bottom of the base and continues to fall through the base through-hole. When the ball is pitched, the stepper motor starts to drive the small gear to rotate, and the large gear drives the ball storage barrel and all the navigation shuttles to rotate. When the first ball storage hole is concentrically aligned with the pitching hole, the navigation shuttle inside the ball storage hole passes through the pitching hole under the action of gravity and begins to fall. After the navigation shuttle falls into the base, it slides along the curved surface formed by the fastest curve in the middle of the base and along the guide rib plate to the bottom of the base, and continues to fall through the through hole of the base. When the navigation shuttle enters the upper gate valve assembly, since the upper gate valve assembly is in the closed state, the navigation shuttle first falls above the gate of the upper gate valve assembly, and then is hydraulically controlled. Open the gate of the upper gate valve assembly. At this time, the navigation shuttle continues to fall above the gate of the lower gate valve assembly. Then, the gate of the upper gate valve assembly is closed through hydraulic control to prevent the high-pressure fracturing fluid in the wellbore from entering the navigation shuttle wellhead automatic delivery device. Next, the gate of the lower gate valve assembly is opened through hydraulic control. At this time, the navigation shuttle falls into the wellbore under the action of gravity. Finally, the gate of the lower gate valve assembly is closed through hydraulic control, and the hydraulic pressure relief valve is opened through hydraulic control to release pressure. When the hydraulic pressure relief valve fails, it is necessary to release pressure through the manual pressure relief valve to finally complete the delivery of a single navigation shuttle.

2. The cylindrical navigation shuttle automatic wellhead delivery system according to claim 1, characterized in that: The outer diameters of the navigation shuttle, the ball storage hole and the ball throwing hole are equal, the distance between the ball storage hole and the central axis of the rotating pin shaft is equal to the distance between the ball throwing hole and the central axis of the rotating pin shaft. When the large gear rotates to the concentric position of the ball storage hole and the ball throwing hole, the navigation shuttle passes through the ball throwing hole and falls from the ball storage hole into the base.

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