Strong-torque rotary guiding shoe for drilling liner cementing

Abstract

The invention discloses a strong-torque rotary guiding shoe for drilling liner cementing, and relates to the technical field of drilling liner cementing, the strong-torque rotary guiding shoe comprises a barrel, a servo motor and a connecting assembly are mounted in the barrel, a side plate is mounted at the bottom of the barrel, a guiding shoe body is fixedly connected to the bottom of the side plate, and a connecting shell is rotatably mounted on the guiding shoe body; a screw rod is fixedly connected to an output shaft of the servo motor, a connecting block is connected to the outer side of the screw rod in a threaded mode, a filling cylinder is installed on the side face of the connecting block, connecting rods are installed on the inner wall of the filling cylinder, and a filling rod is installed between every two adjacent connecting rods; and a first spiral convex plate is mounted on the inner wall of the cylinder body. The guide shoe solves the problems that an existing guide shoe cannot automatically unfold an external cutting structure to actively clear obstacles when resistance is increased, and the guide shoe does not have the function of adjusting a flow field in a barrel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tail pipe cementing, in particular to a strong torque rotating shoe for tail pipe cementing. BACKGROUND

[0002] Tail pipe cementing technology is an important link in oil and gas well construction, the main purpose is to ensure the stability and safety of wellbore through cementing operation, in order to ensure the environmental friendliness and energy utilization efficiency of the operation process, to realize low carbon exploitation, in the process of tail pipe cementing, the shoe is needed to ensure that the cement slurry can effectively plug the well wall, the existing shoe still has some shortcomings.

[0003] The patent for invention with publication number CN103590756A discloses a rotating shoe, which comprises a rotating seat and a guide end arranged at the lower end of the rotating seat, the guide end is a hollow structure, the outer surface of the guide end is provided with a plurality of blades inclined from top to bottom, and the adjacent blades are provided with flow holes leading to the inside of the guide end; the inside of the guide end is provided with rotating turbine blades connected through blade seats; the blade seat is arranged at the top of the guide end; the center of the blade seat is provided with a center hole, and the bottom surface of the blade seat is provided with a hollow column coaxial with the center hole; the rotating turbine blades are at least three, and the inner end of the rotating turbine blades is connected with the hollow column; the top of the rotating turbine blades is connected with the blade seat; the periphery of the blade seat is provided with at least three through holes, and the through holes are respectively arranged between the adjacent rotating turbine blades. The rotating shoe has rotating and guiding functions, and is suitable for use in special wells with long horizontal section, serious formation collapse and serious diameter reduction. Although the above-mentioned rotating shoe can be used in the collapse area, the existing shoe does not have the function of detecting the resistance to travel, cannot automatically deploy the external cutting structure to actively clear the obstacles when the resistance increases, cannot fill the non-spiral cavity to increase the torque when the resistance to travel increases, does not have the function of adjusting the flow field inside the cylinder, and the drainage hole of the existing rotating shoe is usually arranged at the bottom and is easy to be blocked by rock cuttings. SUMMARY

[0004] The present application aims at solving the problems that the existing shoe cannot automatically deploy the external cutting structure to actively clear the obstacles when the resistance increases, and does not have the function of adjusting the flow field inside the cylinder, and provides a strong torque rotating shoe for tail pipe cementing.

[0005] In order to achieve the above object, the application provides the following technical scheme: a strong torque rotating guide shoe for liner cementing of a tail pipe, comprising a cylinder, a servo motor and a connecting assembly being installed in the cylinder, a side plate being installed at the bottom of the cylinder, a guide shoe body being fixedly connected to the bottom of the side plate, a connecting shell being rotatably installed on the guide shoe body, a screw rod being fixedly connected to the output shaft of the servo motor, an adapter block being threadedly connected to the outer side of the screw rod, a filling cylinder being installed on the side surface of the adapter block, an adapter rod being installed on the inner wall of the filling cylinder, a filling rod being installed between two adjacent adapter rods, the connecting assembly comprising an inner cylinder being fixedly connected to the guide shoe body, a first spiral lobe being installed on the inner wall of the cylinder, a second spiral lobe being installed on the inner wall of the inner cylinder, a fixed block being installed on the side plate, an extension assembly, a traction assembly and a sealing plate being installed on the connecting shell, a cutting block and a spring being installed on the extension assembly, a fixed shaft being fixedly connected to the fixed block, a torsion spring being installed between the fixed shaft and the connecting shell, a first through hole being formed in the inner cylinder, a tension sensor being installed on the side plate closest to the first through hole, the tension sensor being electrically connected to the servo motor.

[0006] As a further scheme of the application: the cylinder, the side plate and the guide shoe body are fixedly connected as an integral structure, the side plate is a fan-shaped structure, the outer diameter of the cylinder composed of each side plate is smaller than the outer diameter of the cylinder.

[0007] As a further scheme of the application: a protection assembly is installed on the adapter block, the adapter block, the filling cylinder, the adapter rod and the filling rod are fixedly connected as an integral structure, the adapter block is slidingly installed in the cylinder, the inner wall of the filling cylinder and the outer wall of the inner cylinder are in close contact with each other.

[0008] As a further scheme of the application: the outer wall of the filling cylinder and the side close to the central axis of the first spiral lobe are in close contact with each other, the outer wall of the filling rod and the side close to the central axis of the second spiral lobe are in close contact with each other, the spiral directions of the first spiral lobe and the second spiral lobe are the same, and the first spiral lobe and the second spiral lobe are both arranged along the circumference of the cylinder.

[0009] As a further scheme of the application: the protection assembly comprises baffles fixedly connected to the upper and lower sides of the adapter block, an opening and a moving groove are formed in the cylinder, and the length of the baffle is greater than the length of the moving groove.

[0010] As a further scheme of the application: the surface of the connecting shell is provided with an inclined surface, the periphery of the connecting shell is in close contact with the side plate, a second through hole is formed in the side plate, and the central axis of the first through hole and the central axis of the second through hole of the side plate on which the tension sensor is installed are collinear.

[0011] As a further further scheme of the present application: the extension assembly comprises an inner groove formed in the connecting shell, the connecting shell is provided with fixed plates located on both sides of the inner groove, the cutting blocks are fixedly connected with mounting discs, and the adjacent two mounting discs are provided with a connecting plate, and the two ends of the spring are connected with the mounting disc and the fixed plate respectively.

[0012] As a further further scheme of the present application: the cutting blocks and the spring are equidistantly distributed along the length direction of the fixed plate, the surface of the cutting block is provided with sawtooth blocks uniformly distributed in the circumferential direction, and the torsion spring and the spring are made of alloy steel.

[0013] As a further further scheme of the present application: the traction assembly comprises an extension rod fixedly connected to one of the mounting discs, a pull plate fixedly arranged on the extension rod, a guide rod fixedly arranged on the inner wall of the inner groove, and a guide block and a traction steel rope fixedly connected to the pull plate.

[0014] As a further further scheme of the present application: the traction steel rope closest to the first through hole in the connecting shell is connected to a tension sensor on the side plate closest to the first through hole through the guide rod and the guide block, the traction steel rope passes through the guide rod and the inside of the guide block and the sealing plate, and the sealing plate is in sliding connection with the connecting shell.

[0015] Compared with the prior art, the present application has the following advantages: The device is provided with a tension sensor, a servo motor, a filling cylinder and a filling rod, so as to realize the function of automatically increasing the torque when the running resistance increases, when the guide shoe encounters a narrow section or a protrusion in the well, the fluid pressure acts on the connecting shell and is transmitted to the tension sensor through the traction assembly, the sensor signal triggers the servo motor to drive the screw rod to drive the connecting block, the filling cylinder and the filling rod to move downward, and the non-helical cavity between the first helical plate and the inner cylinder is filled, so that the fluid is concentrated through the helical channel, thereby solving the problem that the existing guide shoe cannot fill the non-helical cavity to increase the torque when the running resistance increases, and the device has the flow field adjustment function inside the cylinder.

[0016] The device adopts the extension assembly and the expandable connecting shell, so as to realize the active obstacle removing function of automatically expanding the cutting structure when encountering resistance, when the running resistance increases, the fluid pressure drives the connecting shell to rotate around the fixed shaft to expand, the extension assembly compresses the spring to drive the mounting disc to drive the multiple cutting blocks to extend outward, so that the guide shoe can actively cut and remove the protrusions of the well wall debris, thereby solving the problem that the existing guide shoe cannot automatically expand the external cutting structure to actively remove obstacles when the resistance increases, and the problem of easy jamming.

[0017] The device is provided with first and second side holes, under normal conditions, fluid drives the spiral lug to generate a rotating torque, when blocked, high pressure fluid is sprayed from the side first hole, pushing the sealing plate and acting on the tension sensor through the traction steel rope, making the servo motor work, solving the problem that the existing guide shoe is easily blocked by rock debris through the bottom drain hole, affecting fluid passing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the whole structure of the application; Figure 2 It is a schematic diagram of the inner synchronization structure of the barrel of the application; Figure 3 It is a schematic diagram of the connection structure of the filling barrel and the connecting rod of the application; Figure 2 It is an enlarged schematic diagram of the structure at A in the application; Figure 4 It is a schematic diagram of the connection structure of the inner barrel and the second spiral lug of the application; Figure 2 It is an enlarged schematic diagram of the structure at B in the application; Figure 5 It is a schematic diagram of the connection structure of the filling barrel and the connecting rod of the application; Figure 6 It is a schematic diagram of the connection structure of the inner barrel and the second spiral lug of the application; Figure 7 It is a schematic diagram of the connection structure of the screw rod and the connecting block of the application; Figure 8 It is a schematic diagram of the inner synchronization structure of the inner barrel of the application; Figure 9 It is a schematic diagram of the connection structure of the servo motor and the screw rod of the application; Figure 10 It is an enlarged schematic diagram of the structure at C in the application; Figure 9 It is a schematic diagram of the connection structure of the sealing plate and the connecting shell of the application; Figure 11 It is a schematic diagram of the connection structure of the connecting shell and the fixed plate of the application; Figure 12 It is an enlarged schematic diagram of the structure at D in the application; Figure 13 Figure 12 It is a schematic diagram of the connection structure of the inner barrel and the guide shoe body of the application; Figure 14 It is an enlarged schematic diagram of the structure at E in the application; Figure 15 It is a schematic diagram of the connection structure of the inner barrel and the guide shoe body of the application; Figure 14 It is an enlarged schematic diagram of the structure at E in the application; Figure 16 It is a schematic diagram of the expanded state structure of the connecting shell of the application.

[0019] ​1, barrel; 2, servo motor; 3, screw rod; 4, connecting block; 5, filling barrel; 6, connecting rod; 7, filling rod; 8, connecting assembly; 801, inner barrel; 802, first spiral lug; 803, second spiral lug; 804, first through hole; 805, second through hole; 9, protection assembly; 901, baffle; 902, opening; 903, moving groove; 10, side plate; 11, guide shoe body; 12, connecting shell; 13, tension sensor; 14, cutting block; 15, spring; 16, extension assembly; 1601, inner groove; 1602, mounting disc; 1603, connecting plate; 1604, fixed plate; 17, traction assembly; 1701, extension rod; 1702, pull plate; 1703, guide rod; 1704, traction steel rope; 1705, guide block; 18, sealing plate; 19, fixed block; 20, fixed shaft; 21, torsional spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments of the present application will be described below according to the overall structure of the present application.

[0022] Embodiment 1 As Figures 1-16As shown, the present embodiment proposes a strong torque rotating guide shoe for tail pipe cementing, which comprises a cylinder 1, a servo motor 2 and a connecting assembly 8 installed in the cylinder 1, a side plate 10 installed at the bottom of the cylinder 1, a guide shoe body 11 fixedly connected at the bottom of the side plate 10, a connecting shell 12 rotatably installed on the guide shoe body 11, a screw rod 3 fixedly connected to the output shaft of the servo motor 2, an adapter block 4 threadedly connected to the outer side of the screw rod 3, a filling cylinder 5 installed on the side surface of the adapter block 4, an adapter rod 6 installed on the inner wall of the filling cylinder 5, a filling rod 7 installed between two adjacent adapter rods 6, the connecting assembly 8 comprising an inner cylinder 801 fixedly connected to the guide shoe body 11, a first spiral lug 802 installed on the inner wall of the cylinder 1, a second spiral lug 803 installed on the inner wall of the inner cylinder 801, a fixed block 19 installed on the side plate 10, an extension assembly 16, a traction assembly 17 and a sealing plate 18 installed on the connecting shell 12, a cutting block 14 and a spring 15 installed on the extension assembly 16, a fixed shaft 20 fixedly connected to the fixed block 19, a torsional spring 21 installed between the fixed shaft 20 and the connecting shell 12, a first through hole 804 formed in the inner cylinder 801, a tension sensor 13 installed on the side plate 10 closest to the first through hole 804, the tension sensor 13 being electrically connected to the servo motor 2, the guide shoe body 11 and the connecting shell 12 being in close contact with each other in the closed state, so as to prevent rock debris from entering the inside of the cylinder 1 during the linear downward movement of the guide shoe, the device being rotatably installed at the bottom of the cementing sleeve, when fluid passes through the first spiral lug 802 and the second spiral lug 803, the fluid is applied with momentum opposite to the spiral direction, so as to generate a reverse force on the first spiral lug 802 and the second spiral lug 803, which is converted into a torque for driving the guide shoe body 11 to rotate, so as to make the guide shoe body 11 rotate, when the guide shoe body 11 passes through a narrow section in the well or a protruding section of the well wall, the downward resistance of the guide shoe body 11 increases, as shown in Figure 8 and Figure 15 As shown, when the downward resistance of the guide shoe body 11 increases, the pressure on the connecting shell 12 increases after the fluid flows out of the first through hole 804, as shown in Figure 12 As shown, the connecting shell 12 can rotate around the fixed shaft 20 after being pressed, so as to compress the torsional spring 21. By using the pressure of the fluid on the connecting shell 12, the guide shoe body 11 rotates at the same time, and abuts against the narrow section or the protruding section of the well wall through the outer wall of the connecting shell 12 to realize the cutting function, the fluid pressure pushes the sealing plate 18, so as to make the sealing plate 18 slide on the connecting shell 12, when the sealing plate 18 moves, the traction assembly 17 transmits the force to the tension sensor 13, so as to make the tension sensor 13 transmit the signal to the servo motor 2, the servo motor 2 drives the screw rod 3 to rotate, the screw rod 3 drives the adapter block 4, the filling cylinder 5, the adapter rod 6 and the filling rod 7 to move downward as a whole, as shown in Figure 5 and Figure 8As shown, the filling cylinder 5 fills the gap between the inner cylinder 801 and the first spiral flange 802, and the filling rod 7 fills the gap between each second spiral flange 803, so that the device can automatically fill the non-spiral cavity, ensuring that the fluid only passes through the spiral cavity, and then automatically increasing the torque when the downward resistance increases, at which time the fluid flow rate will also increase and the connecting shell 12 will further expand outward, and the connecting shell 12 will expand to the state shown in Figure 15 and Figure 16 As shown in Figure 10 , during the process of the connecting shell 12 further moving away from the side plate 10, the spring 15 will be compressed and the cutting block 14 will move towards the outside of the connecting shell 12 under the action of the extension assembly 16 and the traction assembly 17, so that the connecting shell 12 automatically extends a plurality of cutting blocks 14 outward while expanding, thereby enhancing the cutting force of the device.

[0023] Example 2: The scheme in Example 1 will be further introduced in combination with the specific working mode, as described below: As shown in Figure 1 , as a preferred embodiment, on the basis of the above-mentioned mode, further, the cylinder body 1, the side plate 10 and the guide shoe body 11 are fixedly connected as a whole structure, the side plate 10 is a fan-shaped structure, and the outer diameter of the cylinder formed by each side plate 10 is smaller than the outer diameter of the cylinder body 1. The side plates 10 of adjacent two fan-shaped structures are in close contact with each other, ensuring the sealing of the whole device, so as to facilitate the subsequent accurate detection of the downward resistance and enhance the convenience of the device in use.

[0024] As shown in Figures 2-7 , as a preferred embodiment, on the basis of the above-mentioned mode, further, the adapter block 4 is provided with a protection assembly 9, and the adapter block 4, the filling cylinder 5, the adapter rod 6 and the filling rod 7 are fixedly connected as a whole structure, the adapter block 4 is slidingly installed in the cylinder body 1, and the inner wall of the filling cylinder 5 and the outer wall of the inner cylinder 801 are in close contact with each other. When the adapter block 4 moves up and down, the filling cylinder 5, the adapter rod 6 and the filling rod 7 will move synchronously, so as to facilitate the subsequent adjustment of the flow field in the device and enhance the adaptability of the device.

[0025] As shown in Figures 5-8As shown, in a preferred embodiment, based on the above method, the outer wall of the filling cylinder 5 is further fitted with the side of the first spiral convex plate 802 near the central axis of the cylinder 1, and the outer wall of the filling rod 7 is fitted with the side of the second spiral convex plate 803 near the central axis of the cylinder 1. The spiral directions of the first spiral convex plate 802 and the second spiral convex plate 803 are the same, and both the first spiral convex plate 802 and the second spiral convex plate 803 are evenly distributed along the circumference of the cylinder 1. When the fluid passes through the first spiral convex plate 802 and the second spiral convex plate 803, it will cause the cylinder 1 to generate a torque opposite to the spiral direction of the first spiral convex plate 802 and the second spiral convex plate 803, thereby realizing the rotation function. Furthermore, when the filling cylinder 5 and the filling rod 7 move downward, they will gradually fill the non-spiral cavity portions of the first spiral convex plate 802 and the second spiral convex plate 803 through which the fluid passes, thereby enhancing the torque.

[0026] like Figures 2-4 As shown, in a preferred embodiment, based on the above method, the protective component 9 further includes baffles 901 fixedly connected to the upper and lower sides of the connecting block 4. An opening 902 and a moving groove 903 are provided inside the cylinder 1. The length of the baffle 901 is greater than the length of the moving groove 903, ensuring that when the connecting block 4 drives the baffle 901 to move up and down, the baffle 901 can always completely block the opening 902. The moving groove 903 has enough space in the vertical direction for the baffle 901 to move, so that the device can ensure the overall sealing effect without affecting the lifting and lowering of the baffle 901, and realize the protection function of the servo motor 2.

[0027] like Figure 8 and Figure 12 As shown, in a preferred embodiment, based on the above method, the surface of the connecting shell 12 is further provided with a chamfered surface, and the four sides of the connecting shell 12 are in close contact with the side plate 10. A second through hole 805 is provided on the side plate 10, and the central axis of the first through hole 804 is collinear with the central axis of the second through hole 805 on the side plate 10 where the tension sensor 13 is installed. This ensures that under the impact of water flow, the water pressure can accurately act on the tension sensor 13, so as to adaptively enhance the torque when the travel resistance increases.

[0028] like Figure 10 As shown, in a preferred embodiment, based on the above method, the extension component 16 further includes an inner groove 1601 formed in the connecting shell 12, a fixing plate 1604 located on both sides of the inner groove 1601 mounted on the connecting shell 12, a mounting plate 1602 fixedly connected to the cutting block 14, a connecting plate 1603 installed between two adjacent mounting plates 1602, and the two ends of the spring 15 connected to the mounting plate 1602 and the fixing plate 1604 respectively. Figure 10As can be seen, the fixed plate 1604 and the sealing plate 18 ensure that the inner groove 1601 is always closed, the mounting disc 1602 and the connecting plate 1603 connect the plurality of cutting blocks 14 as a whole, and the plurality of cutting blocks 14 are synchronously moved so as to be subsequently adjusted in cutting force.

[0029] As shown in Figure 10 and Figure 12 , as a preferred embodiment, on the basis of the above mode, further, the cutting blocks 14 and the springs 15 are equidistantly distributed along the length direction of the fixed plate 1604, the surface of the cutting block 14 is provided with the sawtooth blocks equidistantly arranged in the circumferential direction, and the torsion spring 21 and the spring 15 are both made of alloy steel. The alloy steel can improve the high-temperature resistance of the elastic member, reduce the adverse effects of high temperature on the torsion spring 21 and the spring 15, and the equidistantly distributed cutting blocks 14 enable the device to improve the cutting force from multiple positions.

[0030] As shown in Figure 9 and Figure 10 , as a preferred embodiment, on the basis of the above mode, further, the traction assembly 17 includes an extension rod 1701 fixedly connected to one of the mounting discs 1602, the extension rod 1701 is fixedly provided with a pull plate 1702, the inner wall of the inner groove 1601 is fixedly provided with a guide rod 1703, and the pull plate 1702 is fixedly connected with a guide block 1705 and a traction steel rope 1704. Since the tension sensor 13 is only installed on the side plate 10 closest to the first through hole 804, for the side plate 10 closest to the first through hole 804 and the connecting shell 12, the traction steel rope 1704 is guided by the guide rod 1703 and the guide block 1705 to be connected with the tension sensor 13 on the side plate 10, and for the side plates 10 and the connecting shell 12 at other positions without the tension sensor 13, the corresponding traction steel rope 1704 is guided by the guide rod 1703 and the guide block 1705 to be directly connected with the side plate 10 at the corresponding position, so as to ensure that the first through hole 804 only acts on one tension sensor 13, thereby ensuring that the signal received by the servo motor 2 is accurate.

[0031] As shown in Figure 10 , as a preferred embodiment, on the basis of the above mode, further, the traction steel rope 1704 in the connecting shell 12 closest to the first through hole 804 is guided by the guide rod 1703 and the guide block 1705 to be connected with the tension sensor 13 on the side plate 10 closest to the first through hole 804, the traction steel rope 1704 passes around the guide rod 1703 and penetrates into the inside of the guide block 1705 and the sealing plate 18, and the sealing plate 18 is in sliding connection with the connecting shell 12. Figure 10When the sealing plate 18 is in the middle position, the traction steel ropes 1704 on both sides of the sealing plate 18 are exactly in a straight line. At this time, the surface of the sealing plate 18 is flush with the back of the connecting shell 12. When the fluid pressure acts on the sealing plate 18, the sealing plate 18 will move towards the pull plate 1702. During the process of the sealing plate 18 moving but not yet contacting the pull plate 1702, the traction steel ropes 1704 on both sides of the sealing plate 18 change from a straight line to a broken line, so that the tension sensor 13 can detect the tension.

[0032] Example 3: The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods. Specifically, the high-torque rotary guide shoe, originally used for tailpipe cementing, is used in the following ways: Figure 12 As shown, in the closed state, the guide shoe body 11 and the connecting shell 12 are closely fitted together to prevent rock cuttings from entering the interior of the casing 1 during the straight downward movement of the guide shoe. This device is rotatably installed at the bottom of the cementing sleeve. Figures 1-8 As shown, Figure 8 The arrows indicate the direction of fluid flow. When the fluid passes through the first spiral convex plate 802 and the second spiral convex plate 803, the fluid is subjected to momentum opposite to the spiral direction, thereby generating a counterforce on the first spiral convex plate 802 and the second spiral convex plate 803. This force is converted into torque that drives the guide shoe body 11 to rotate, causing the guide shoe body 11 to rotate. When the guide shoe body 11 passes through a narrow section inside the well or a protrusion on the well wall, the downward resistance of the guide shoe body 11 increases, such as... Figure 8 and Figure 15 As shown, the downward resistance of the shoe body 11 increases, and the pressure on the connecting shell 12 increases after the fluid flows out of the first through hole 804. Figure 12 As shown, the connecting shell 12 can rotate around the fixed shaft 20 after being compressed, thus compressing the torsion spring 21. Utilizing the pressure of the fluid on the connecting shell 12, the guide shoe body 11 rotates while simultaneously abutting against a narrow or protruding section of the well wall through the outer wall of the connecting shell 12, thereby achieving the cutting function.

[0033] like Figures 9-16 The fluid pressure also pushes the sealing plate 18, causing it to slide on the connecting shell 12. During its movement, the sealing plate 18 acts on the tension sensor 13 through the traction assembly 17. When the sealing plate 18 is located at... Figure 10When the sealing plate 18 is in the middle position, the traction steel ropes 1704 on both sides of the sealing plate 18 are exactly in a straight line. At this time, the surface of the sealing plate 18 is flush with the back of the connecting shell 12. When fluid pressure acts on the sealing plate 18, the sealing plate 18 will move towards the pull plate 1702. During the process of the sealing plate 18 moving but not yet contacting the pull plate 1702, the traction steel ropes 1704 on both sides of the sealing plate 18 change from a straight line to a broken line, so that the tension sensor 13 detects the tension. The tension sensor 13 transmits the signal to the servo motor 2, which drives the screw 3 to rotate. The screw 3 drives the connecting block 4, filling cylinder 5, connecting rod 6 and filling rod 7 to move downward as a whole. Figure 5 and Figure 8 As shown, the filling cylinder 5 fills the gap between the inner cylinder 801 and the first spiral protrusion 802, and the filling rod 7 fills the gap between each of the second spiral protrusions 803, thereby enabling the device to automatically fill the non-spiral cavity, ensuring that the fluid only passes through the spiral cavity, and thus automatically increasing the torque when the downward resistance increases. At this time, the fluid flow rate will also increase, causing the connecting shell 12 to expand further outward. When the connecting shell 12 expands to the point where... Figure 15 and Figure 16 In the state shown, such as Figure 10 As shown, during the process of the connecting shell 12 moving further away from the side plate 10, under the action of the extension assembly 16 and the traction assembly 17, the spring 15 is compressed, and the cutting block 14 moves outward from the connecting shell 12. This causes the connecting shell 12 to automatically extend outward with multiple sets of cutting blocks 14 while unfolding, thereby enhancing the cutting force of the device. The fixing plate 1604 and the sealing plate 18 on the extension assembly 16 ensure that the inner groove 1601 remains closed at all times. The mounting plate 1602 and the connecting plate 1603 connect multiple cutting blocks 14 into a whole, so that multiple cutting blocks 14 move synchronously. During the outward expansion of the connecting shell 12, the traction steel rope 1704, guided by the guide block 1705 and the guide rod 1703, pulls the pull plate 1702 and the extension rod 1701 to push multiple sets of cutting blocks 14 to move. At this time, the spring 15 is compressed, and the cutting block 14 moves to the outside of the connecting shell 12, completing the process from the side plate 10 to the side plate 10. Figures 10 to 15 The transformation.

[0034] It should be noted that during the normal downward movement of the device, under the action of fluid pressure, for example, the angle between the connecting shell 12 and the side plate 10 is less than 5°, allowing normal passage through the well body. When the guide shoe body 11 passes through a narrow section inside the well or a protrusion on the well wall, the connecting shell 12 is forced to close, causing the connecting shell 12 and the side plate 10 to adhere to each other. As the pressure gradually increases, the pressure of the connecting shell 12 on the well wall also gradually increases, utilizing the connecting shell 12 to achieve the cutting function. During the cutting process of the connecting shell 12 on the well wall, as the pressure on the connecting shell 12 gradually increases, after the connecting shell 12 completes the cutting of the protruding part of the well wall, the connecting shell 12 will quickly expand to a position greater than 5° and less than 10° in a short time. During this process, such as Figure 9 and Figure 10 As shown, during the rotation of the connecting shell 12, the traction component 17 will act on the tension sensor 13, such as... Figure 10 As shown, since the tension sensor 13 is installed only on the side plate 10 closest to the first through hole 804, for the side plate 10 and connecting shell 12 closest to the first through hole 804, the traction steel rope 1704 is guided by the guide rod 1703 and the guide block 1705 to connect with the tension sensor 13 on the side plate 10 at that location. For the side plates 10 and connecting shell 12 at other locations where the tension sensor 13 is not installed, the corresponding traction steel rope 1704 is guided by the guide rod 1703 and the guide block 1705 to connect directly to the side plate 10 at the corresponding location, ensuring that the first through hole 804 only acts on one tension sensor 13, thereby ensuring that the signal received by the servo motor 2 is accurate. After the tension sensor 13 is subjected to tension, it transmits the signal to the servo motor 2, which drives the screw 3 to rotate. The screw 3 drives the connecting block 4, filling cylinder 5, connecting rod 6 and filling rod 7 to move downward as a whole, so that the device can automatically fill the non-spiral cavity in the cylinder 1. Figures 2-4 As shown, when the connecting block 4 drives the baffle 901 to move up and down, the baffle 901 can always block the opening 902, thereby protecting the servo motor 2. The moving slot 903 has enough space in the vertical direction for the baffle 901 to move, so that the device can ensure the overall sealing effect without affecting the lifting and lowering of the baffle 901.

[0035] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high torque rotational shoe for liner cementing, comprising a barrel (1), characterized in that, The servo motor (2) and the connecting assembly (8) are installed in the barrel (1), the bottom of the barrel (1) is provided with a side plate (10), the bottom of the side plate (10) is fixedly connected with a guide shoe body (11), the guide shoe body (11) is rotatably provided with a connecting shell (12), the output shaft of the servo motor (2) is fixedly connected with a screw rod (3), the outer side of the screw rod (3) is threadedly connected with a connecting block (4), the side of the connecting block (4) is provided with a filling barrel (5), the inner wall of the filling barrel (5) is provided with a connecting rod (6), the adjacent two connecting rods (6) are provided with a filling rod (7), the connecting assembly (8) comprises an inner barrel (801) fixedly connected to the guide shoe body (11), the inner wall of the barrel (1) is provided with a first spiral flange (802), the inner wall of the inner barrel (801) is provided with a second spiral flange (803), the side plate (10) is provided with a fixed block (19), the connecting shell (12) is provided with an extension assembly (16), a traction assembly (17) and a sealing plate (18), the extension assembly (16) is provided with a cutting block (14) and a spring (15), the fixed block (19) is fixedly connected with a fixed shaft (20), the fixed shaft (20) and the connecting shell (12) are provided with a torsion spring (21), the inner barrel (801) is provided with a first through hole (804), the side plate (10) closest to the first through hole (804) is provided with a tension sensor (13), and the tension sensor (13) is electrically connected with the servo motor (2).

2. A high torque swivel shoe for liner cementing according to claim 1, characterized in that, The barrel (1), the side plate (10) and the guide shoe body (11) are fixedly connected as an integral structure, the side plate (10) is a fan-shaped structure, the outer diameter of the cylinder composed of each side plate (10) is smaller than the outer diameter of the barrel (1).

3. A high torque swivel shoe for liner cementing according to claim 1, characterized in that, The connecting block (4) is provided with a protection assembly (9), the connecting block (4), the filling barrel (5), the connecting rod (6) and the filling rod (7) are fixedly connected as an integral structure, the connecting block (4) is slidably installed in the barrel (1), and the inner wall of the filling barrel (5) and the outer wall of the inner barrel (801) are matched with each other.

4. A high torque swivel shoe for liner cementing according to claim 1, characterized in that, The outer wall of the filling barrel (5) and the side of the first spiral flange (802) close to the central axis of the barrel (1) are matched with each other, the outer wall of the filling rod (7) and the side of the second spiral flange (803) close to the central axis of the barrel (1) are matched with each other, the spiral directions of the first spiral flange (802) and the second spiral flange (803) are the same, and the first spiral flange (802) and the second spiral flange (803) are uniformly distributed along the circumference of the barrel (1).

5. A high torque swivel shoe for liner cementing according to claim 3, characterized in that, The protection assembly (9) comprises baffle plates (901) fixedly connected to the upper and lower sides of the connecting block (4), the barrel (1) is provided with an opening (902) and a moving groove (903), and the length of the baffle plate (901) is greater than the length of the moving groove (903).

6. A high torque swivel shoe for liner cementing according to claim 1, characterized in that, The surface of the connecting shell (12) is provided with a bevel, the periphery of the connecting shell (12) is attached to the side plate (10), the second through hole (805) is formed in the side plate (10), and the central axis of the first through hole (804) is collinear with the central axis of the second through hole (805) in the side plate (10) where the tension sensor (13) is installed.

7. A high torque swivel shoe for liner cementing according to claim 1, characterized in that, The extension assembly (16) comprises an inner groove (1601) formed in the connecting shell (12), the connecting shell (12) is provided with a fixed plate (1604) located on both sides of the inner groove (1601), the cutting block (14) is fixedly connected with a mounting disc (1602), an adapter plate (1603) is installed between adjacent two mounting discs (1602), and the two ends of the spring (15) are connected with the mounting disc (1602) and the fixed plate (1604) respectively.

8. A high torque swivel shoe for liner cementing according to claim 7, characterized in that, The cutting block (14) and the spring (15) are equidistantly distributed along the length direction of the fixed plate (1604), the surface of the cutting block (14) is provided with a sawtooth block uniformly distributed in the circumferential direction, and the torsion spring (21) and the spring (15) are made of alloy steel.

9. A high torque swivel shoe for liner cementing according to claim 7, characterized in that, The traction assembly (17) comprises an extension rod (1701) fixedly connected to one of the mounting discs (1602), a pulling plate (1702) fixedly arranged on the extension rod (1701), a guide rod (1703) fixedly arranged on the inner wall of the inner groove (1601), and a guide block (1705) and a traction steel wire (1704) fixedly connected to the pulling plate (1702).

10. A high torque swivel shoe for liner cementing according to claim 9, characterized in that, The traction steel wire (1704) in the connecting shell (12) closest to the first through hole (804) is guided by the guide rod (1703) and the guide block (1705) and connected to the tension sensor (13) on the side plate (10) closest to the first through hole (804), the traction steel wire (1704) passes around the guide rod (1703) and penetrates into the guide block (1705) and the sealing plate (18), and the sealing plate (18) is in sliding connection with the connecting shell (12).

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