Power elevator and remote under-pressure operation system

Abstract

The utility model relates to the technical field of oil and gas drilling and production equipment, in particular to a power elevator and a remote control under-pressure operation system, the power elevator comprises an elevator main body with an opening, a bushing and a bumper, the opening end is provided with a stop lever used for controlling the opening to be opened and closed, the bushing is provided with a notch, the maximum distance between the inner walls of the notch is d1, and the maximum distance between the inner walls of the notch is d2. The diameter of the outer wall of the pipe column is d2, the diameter of the outer wall of the section hoop of the pipe column is D, and d1 is larger than d2 and smaller than D; one end of the bumper is hinged with the elevator main body; the lining is detachably installed on the elevator body, a gap is reserved between the lining and the elevator body, and the elastic assembly is installed between the lining and the elevator body and used for adjusting the height of the gap. The bushing is movably connected with the bumper, the bushing is close to the elevator main body to drive the bumper to lock the stop lever, and the bushing is far away from the elevator main body to drive the bumper to unlock the stop lever. In the whole locking and unlocking process of the power elevator, the gravity of the pipe column is utilized, additional manual operation is not needed, and efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas drilling equipment, in particular to a power elevator and a remote pressure operation system. Background Art

[0002] Well repair is an important part of the construction process of oil and gas exploration and development. The pressure operation system is an advanced downhole operation method that keeps the wellbore in a certain pressure state and disassembles and installs pipes without killing the well or releasing the pressure. Pressure operation can protect and maintain the original production capacity of the formation, reduce the number of production-increasing measures such as acid fracturing, and provide a good foundation for the long-term development and stable production of oil and gas fields.

[0003] When the pressure operation system is working, it is necessary to use an elevator to grab the pipe string to facilitate the lifting and lowering of the pipe string in the well. Existing power elevators mostly use a baffle to prevent the grabbed pipe string from falling off, but the existing elevators lack a safety device. There is a risk of the baffle bar accidentally opening when the elevator is working, which poses a great threat to personal and property safety. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the existing elevators, such as the lack of safety devices and the risk of accidental opening when the elevators are working, and to provide a power elevator and a remote pressure operation system.

[0005] In a first aspect, the utility model provides a power elevator, comprising an elevator body, an opening is arranged on one side of the elevator body, a stopper is arranged at the end of the opening, the stopper is used to control the opening and closing of the opening, and further comprising a bushing and a safety rod, the bushing is provided with a notch, the maximum distance between the inner walls of the notch is d1, the outer wall diameter of the pipe column is d2, the outer wall diameter of the section hoop of the pipe column is D, d2<d1<D; one end of the safety rod is hinged to the elevator body, and the safety rod is used to lock the stopper; the bushing is detachably mounted on the elevator body, a gap is left between the bushing and the elevator body, an elastic component is installed between the bushing and the elevator body, and the elastic component is used to adjust the height of the gap; the bushing is movably connected to the safety rod, the bushing approaches the elevator body and then drives the safety rod to lock the stopper, and the bushing moves away from the elevator body and then drives the safety rod to unlock the stopper; the notch and the opening are both used for allowing the pipe column to enter and exit the elevator body.

[0006] The outer wall diameter D of the pipe column segment hoop is generally larger than the outer wall diameter d2 of the pipe column. The power elevator provided by the utility model has a notch size that allows the pipe column to enter the bushing, but the pipe column segment hoop will be stuck on the bushing. When the pipe column enters the notch of the bushing, the stopper is closed and the power elevator is lifted. When the pipe column segment hoop contacts the bushing, the bushing is pressed down by the gravity of the pipe column itself. The bushing compresses the elastic component, and the height of the gap between the bushing and the main body of the elevator is reduced. The bushing drives the safety rod to lock the stopper to realize the automatic locking function, which greatly reduces the risk of the stopper being accidentally opened during the operation of the elevator and improves the safety performance of the power elevator. When the pipe column is lifted into place, the segment hoop that presses the bushing gradually separates from the bushing. At this time, the elastic component plays an elastic role, and the bushing gradually moves away from the main body of the elevator. The elastic component pushes the bushing to drive the safety rod to unlock the stopper, realizing the automatic unlocking function.

[0007] The power elevator has a simple structure and can achieve mechanical self-locking. The entire locking and unlocking process utilizes the own gravity of the pipe column and does not require additional manual operation, thereby improving efficiency and reliability. The bushing and the elevator body are detachable and installable, and bushings of different sizes can be replaced to adapt to pipe columns of different diameters, thereby improving the applicability of the power elevator.

[0008] Preferably, the elevator body is equipped with a first power cylinder, the first power cylinder is drivingly connected to the blocking rod, and the first power cylinder drives the blocking rod to perform rotational motion.

[0009] With this structural arrangement, automatic control of the shift lever switch is achieved by installing the first power cylinder and driving the shift lever, thereby reducing the need for manual operation and improving work efficiency.

[0010] Preferably, the bushing is installed with a connecting rod, the safety rod is provided with a first through hole, the connecting rod is passed through the first through hole, and the connecting rod drives the safety rod to be lifted or lowered.

[0011] With this structural arrangement, the connecting rod passes through the first through hole of the safety rod, so that the bushing and the safety rod can be linked to each other, ensuring that the movement of the safety rod is synchronized with the movement of the bushing.

[0012] Preferably, a first recess is provided at the free end of the safety rod, the first recess faces the elevator body, and the first recess is used to lock the blocking rod.

[0013] With this structural arrangement, when the safety lever locks the blocking lever, the blocking lever is located in the first recess, providing a more reliable locking effect and reducing the risk of the blocking lever being accidentally opened.

[0014] Preferably, it also includes a second power cylinder and a limit rod, the second power cylinder is installed on the elevator body, the second power cylinder is hinged to the limit rod, the piston rod of the second power cylinder rises and drives the limit rod to press down and lock the blocking rod, and the piston rod of the second power cylinder falls and drives the limit rod to lift up and unlock the blocking rod.

[0015] With this structural setting, the limit rod and the safety rod together form a double safety mechanism, providing additional protection for the locking of the barrier rod, significantly improving the safety of the entire system; the second power cylinder can actively control the movement of the limit rod to achieve locking and unlocking of the barrier rod, increasing the controllability of the system.

[0016] Preferably, a first slot is provided at one end of the limit rod, an open portion of the first slot is hinged to the second power cylinder, a first hinge seat is installed on the elevator body, the first hinge seat is located in the first slot, and the limit rod is hinged to the elevator body through the first hinge seat.

[0017] With this structural arrangement, the second power cylinder drives the limit rod to swing up and down around the first hinge seat, thereby facilitating control of the limit rod.

[0018] Preferably, the limiting rod comprises a bending portion, the bending portion is located at an end of the limiting rod away from the first notch, and the bending portion is used to lock the blocking rod.

[0019] With this structural setting, when the limit rod presses down to lock the stop rod, the bent portion can prevent the stop rod from opening, providing a more stable locking effect, preventing the stop rod from accidentally opening when subjected to external force or vibration, and improving the safety of the elevator.

[0020] Preferably, a roller is installed at the free end of the bending portion, and the roller can roll freely relative to the bending portion.

[0021] With this structural setting, by installing a roller at the free end of the bent portion, when the bent portion presses down to lock the baffle bar, the roller can prevent the bent portion from directly contacting the baffle bar, thereby reducing the resistance when locking or unlocking the baffle bar, making the entire operation process easier and more efficient.

[0022] Preferably, lifting ears are installed on both sides of the lifting card body.

[0023] The lifting lugs are arranged on both sides of the elevator body, which facilitates the connection between the powered elevator and the traveling block, and can better balance and stabilize the elevator during the pipe string lifting process, reducing the risk of tilting or tipping, and ensuring the safety of operation.

[0024] In a second aspect, the utility model provides a remote pressure-operating system, including a pressure-operating machine and the above-mentioned power elevator, wherein the pressure-operating machine is used to remove or install a pipe string in a wellbore under pressure, and the power elevator is used to grab and lift the pipe string.

[0025] The remote pressure operation system provided by the utility model uses the power elevator provided by the utility model. The power elevator has a simple structure and can achieve mechanical self-locking. The entire locking and unlocking process utilizes the own gravity of the pipe column, and no additional manual operation is required, thereby improving efficiency and safety.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] 1. The power elevator provided by the utility model has a notch size of the bushing that allows the pipe column to enter, but the pipe column section hoop will be stuck on the bushing. When the pipe column enters the notch of the bushing, the stopper is closed, and the power elevator is lifted. When the pipe column section hoop contacts the bushing, the bushing is pressed down by the gravity of the pipe column itself. The bushing compresses the elastic component, and the height of the gap between the bushing and the elevator body is reduced. The bushing drives the safety rod to lock the stopper to realize the automatic locking function, which greatly reduces the risk of the stopper rod accidentally opening during the operation of the elevator and improves the safety performance of the power elevator. When the pipe column is lifted into place, the section hoop that presses the bushing gradually separates from the bushing. At this time, the elastic component plays an elastic role, and the bushing gradually moves away from the elevator body. The elastic component pushes the bushing to drive the safety rod to unlock the stopper rod, thereby realizing the automatic unlocking function;

[0028] 2. The power elevator provided by the utility model has a simple structure and can realize mechanical self-locking. The entire locking and unlocking process utilizes the own gravity of the pipe column, and no additional manual operation is required, thereby improving efficiency and reliability. The bushing and the elevator body can be detachably installed, and bushings of different sizes can be replaced to adapt to pipe columns of different diameters, thereby improving the applicability of the power elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the power elevator structure.

[0030] Figure 2 This is a schematic diagram of the power elevator structure with the bushing hidden.

[0031] Figure 3 This is a top view of the power elevator.

[0032] Figure 4 This is the rear view of the power elevator.

[0033] Figure 5 This is a schematic diagram of the main structure of the elevator.

[0034] Figure 6 Schematic diagram of the bushing structure.

[0035] Figure 7 It is a schematic diagram of the bumper structure.

[0036] Figure 8 Schematic diagram of the limit rod structure.

[0037] Fig. 9 This is a schematic diagram of a conventional pipe string structure.

[0038] Markings in the figure:

[0039] 1-lifting card body, 11-first hinge seat, 12-second hinge seat, 2-stop rod, 3-bushing, 31-connecting rod, 4-safety rod, 41-first through hole, 42-first recess, 5-elastic component, 6-first power cylinder, 7-second power cylinder, 8-limiting rod, 81-first notch, 82-bending portion, 821-roller, 9-lifting ear, 100-open, 200-notch, 300-gap, 400-suspension cavity. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0041] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0043] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0044] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0045] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0046] Example 1

[0047] In the field of oil and gas drilling equipment technology, elevators are mainly used to move drill pipes, casing, tubing and other pipe equipment. Figure 1-Figure 4 As shown, this embodiment provides a power elevator, including an elevator body 1, specifically, as shown in Figure 5 As shown, an opening 100 is provided at one side of the elevator body 1. The opening 100 may be an opening structure that gradually increases from the elevator body 1 to the outside. The opening 100 is used for allowing the pipe column to enter and exit the elevator body 1.

[0048] A stopper 2 is provided at the end of the opening 100. Further, as Figure 1As shown, the elevator body 1 is further provided with a first power cylinder 6, which is drivingly connected to the stopper rod 2, and the first power cylinder 6 drives the stopper rod 2 to rotate. Specifically, the first power cylinder 6 can be, for example, a hydraulic cylinder, an electric cylinder, or a gas cylinder. The cylinder body of the first power cylinder 6 can be hinged to the elevator body 1 through a pin, and one end of the piston rod of the first power cylinder 6 can be hinged to the stopper rod 2. The stopper rod 2 is hinged to the elevator body 1 through, for example, a pin, and the stopper rod 2 can rotate around the pin, for example. Figure 1 As shown in , the piston rod extends to drive the stopper rod 2 to close the opening 100, and the piston rod retracts to drive the stopper rod 2 to open the opening 100. The stopper rod 2 is used to control the opening and closing of the opening 100. Figure 1 The state of the blocking rod 2 closing the opening 100 is shown. At this time, the blocking rod 2 and the opening 100 enclose a suspension cavity 400 for suspending the pipe column. The suspension cavity 400 is used to accommodate the pipe column. By installing the first power cylinder 6 and driving the blocking rod 2, the automatic control of the opening and closing of the blocking rod 2 is realized, the need for manual operation is reduced, and the work efficiency is improved.

[0049] The power elevator also includes a bushing 3 and a safety rod 4. Figure 6 As shown, the bushing 3 is provided with a notch 200, which can be set as a U-shaped notch. The orientation of the notch 200 is the same as that of the opening 100, and the notch 200 is used for the pipe string to enter and exit the bushing 3. Figure 1 The state in which the blocking rod 2 closes the opening 100 is shown. At this time, the blocking rod 2 also closes the notch 200. The blocking rod 2 and the notch 200 form a suspension cavity 400 for suspending the pipe column.

[0050] like Fig. 9 The schematic diagram of the structure of a common pipe string is shown. The outer wall diameter D of the pipe string joint hoop is generally larger than the outer wall diameter d2 of the pipe string. The maximum distance between the inner walls of the notch 200 is d1, and d2<d1<D. This arrangement allows the pipe string body to enter the notch 200, but as the power elevator is lifted, the outer wall diameter D of the pipe string joint hoop is larger than the maximum distance d1 between the inner walls of the notch 200, that is, the pipe string joint hoop will be stuck at the notch 200.

[0051] like Figure 4 As shown, the bushing 3 is detachably mounted on the elevator body 1, a gap 300 is left between the bushing 3 and the elevator body 1, and an elastic component 5 is installed between the bushing 3 and the elevator body 1. In this embodiment, the elastic component 5 can be a coil spring, and the elastic component 5 is used to adjust the height of the gap 300 (i.e., the distance between the bushing 3 and the elevator body 1);

[0052] The bushing 3 is movably connected to the safety bar 4. When the bushing 3 approaches the elevator body 1 (the height of the gap 300 decreases), the safety bar 4 is driven to buckle the stop bar 2. When the bushing 3 moves away from the elevator body 2 (the height of the gap 300 increases), the safety bar 4 is driven to unlock the stop bar 2.

[0053] Further, such as Figure 5 , Figure 6 , Figure 7 As shown, a first hinge seat 11 and a second hinge seat 12 can be provided on the elevator body 1, one end of the safety rod 4 is hinged to the elevator body 1 through the second hinge seat 12, and a connecting rod 31 is installed on the bushing 3. The connecting rod 31 can be provided on a side of the bushing 3 close to the safety rod 4. Of course, it can also be as shown in FIG. Figure 6 As shown, the safety lever 4 is provided on both sides of the bushing 3. The safety lever 4 is provided with a first through hole 41, and the connecting rod 31 is passed through the first through hole 41. The connecting rod 31 drives the safety lever 4 to be lifted or lowered, so as to realize the linkage between the bushing 3 and the safety lever 4, and ensure that the movement of the safety lever 4 is synchronized with the movement of the bushing 3. The safety lever 4 is used to lock the stopper 2.

[0054] Further, such as Figure 7 As shown, a first recess 42 can be provided at the free end of the safety rod 4, that is, the first recess 42 is located at the end of the safety rod 4 away from the second hinge seat 12, and the first recess 42 faces the elevator body 1. The first recess 42 is used to lock the blocking rod 2. When the blocking rod 2 is in a state of closing the opening 100, the first recess 42 can buckle the blocking rod 2, providing a more reliable locking effect and reducing the risk of the blocking rod 2 being accidentally opened.

[0055] Further, such as Figure 1 As shown, lifting ears 9 are installed on both sides of the elevator body 1. The lifting ears 9 are arranged on both sides of the elevator body 1 to facilitate the connection between the power elevator and the traveling block, and can better balance and stabilize the elevator during the process of lifting the pipe column, reduce the risk of tilting or overturning, and ensure the safety of operation.

[0056] In the power elevator provided in this embodiment, the size of the notch 200 opened in the bushing 3 is large enough for the pipe column to enter, but the pipe column section hoop will be stuck on the bushing 3. When the pipe column enters the notch 200 of the bushing 3, the stopper 2 is closed, and the power elevator is lifted. When the pipe column section hoop contacts the bushing 3, the bushing 3 is pressed down by the gravity of the pipe column itself, and the bushing 3 compresses the elastic component 5. The height of the gap 300 between the bushing 3 and the elevator body 1 is reduced, and the bushing 3 drives the safety bar 4 to lock the stopper 2 to realize the automatic locking function, which greatly reduces the risk of the stopper 2 accidentally opening during the operation of the elevator, and improves the safety performance of the power elevator. When the pipe column is lifted into place, the section hoop pressing the bushing 3 gradually separates from the bushing 3. At this time, the elastic component 5 plays an elastic role, and the bushing 3 gradually moves away from the elevator body 1. The elastic component 5 pushes the bushing 3 to drive the safety bar 4 to unlock the stopper 2, realizing the automatic unlocking function.

[0057] The power elevator has a simple structure and can achieve mechanical self-locking. The entire locking and unlocking process utilizes the own gravity of the pipe column and does not require additional manual operation, thereby improving efficiency and reliability. The bushing 3 and the elevator body 1 are detachable and can be replaced with bushings 3 of different sizes to adapt to pipe columns of different diameters, thereby improving the applicability of the power elevator.

[0058] Example 2

[0059] like Figure 1 , Figure 8 As shown, based on Example 1, the power elevator provided in this embodiment also includes a second power cylinder 7 and a limit rod 8. The second power cylinder 7 is installed on the elevator body 1, and the second power cylinder 7 is hinged to the limit rod 8. The second power cylinder 7 in this embodiment can specifically be a hydraulic cylinder.

[0060] Furthermore, a first notch 81 is provided at one end of the limiting rod 8 close to the second power cylinder 7, and the open part of the first notch 81 is hinged to the second power cylinder 7. The first hinge seat 11 is installed on the elevator body 1, and the first hinge seat 11 is located in the first notch 81. Specifically, the first notch 81 can be hinged to the first hinge seat 11 through a pin, and the limiting rod 8 is hinged to the elevator body 1 through the first hinge seat 11. The piston rod of the second power cylinder 7 rises and drives the limiting rod 8 to rotate around the first hinge seat 11 to press down the locking lever 2, and the piston rod of the second power cylinder 7 falls and drives the limiting rod 8 to rotate around the first hinge seat 11 to lift up and unlock the lever 2. The second power cylinder 7 drives the limiting rod 8 to swing up and down around the first hinge seat 11, so as to realize the control of the limiting rod 8.

[0061] Furthermore, the limiting rod 8 includes a bending portion 82, and the bending portion 82 is located at an end away from the first notch 81, and the bending portion 82 is used to lock the blocking rod 2. It can be foreseen that the main body and the bending portion 82 of the limiting rod 8 of this embodiment can be an integrally formed structure, and the extension direction of the bending portion 82 is different from the extension direction of the main body. Preferably, the extension direction of the bending portion 82 is perpendicular to the extension direction of the main body. When the limiting rod 8 is pressed down to lock the blocking rod 2, the bending portion 82 can prevent the blocking rod 2 from opening, providing a more stable locking effect, preventing the blocking rod 2 from accidentally opening when subjected to external force or vibration, and improving the safety of the hanging card.

[0062] Furthermore, a roller 821 is installed at the free end of the bent portion 82 (i.e., the end of the bent portion 82 away from the first hinge seat 11), and the roller 821 can roll freely relative to the bent portion 82. By installing the roller 821 at the free end of the bent portion 82, when the bent portion 82 presses down to lock the blocking rod 2, the roller 821 can prevent the bent portion 82 from directly contacting the blocking rod 2, thereby reducing the resistance when locking or unlocking the blocking rod 2, making the entire operation process easier and more efficient.

[0063] The power elevator limit rod 8 and the safety rod 4 provided in this embodiment together form a double safety mechanism, which provides additional protection for the locking of the barrier rod 2 and significantly improves the safety of the entire system; the second power cylinder 7 can actively control the movement of the limit rod 8 to achieve locking and unlocking of the barrier rod 2, increasing the controllability of the system.

[0064] Example 3

[0065] This embodiment provides a remote pressure-operating system, including a pressure-operating machine and a power elevator provided by any one of Embodiment 1 or Embodiment 2. The pressure-operating machine is used to remove or install a pipe string in a wellbore under pressure, and the power elevator is used to grab and lift the pipe string.

[0066] The remote pressure operation system provided in this embodiment uses the power elevator provided in either embodiment 1 or embodiment 2. The power elevator has a simple structure and can achieve mechanical self-locking. The entire locking and unlocking process utilizes the own gravity of the pipe string, and no additional manual operation is required, thereby improving efficiency and safety.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powered elevator, comprising an elevator body (1), an opening (100) being arranged on one side of the elevator body (1), a stopper (2) being arranged at the end of the opening (100), the stopper (2) being used to control the opening and closing of the opening (100), characterized in that: It also includes a bushing (3) and a safety rod (4), the bushing (3) is provided with a notch (200), the maximum distance between the inner walls of the notch (200) is d1, the outer wall diameter of the pipe column is d2, the outer wall diameter of the section hoop of the pipe column is D, d2<d1<D; one end of the safety rod (4) is hinged to the elevator body (1), and the safety rod (4) is used to lock the stop rod (2); The bushing (3) is detachably mounted on the elevator body (1), a gap (300) is left between the bushing (3) and the elevator body (1), an elastic component (5) is installed between the bushing (3) and the elevator body (1), and the elastic component (5) is used to adjust the height of the gap (300); The bushing (3) is movably connected to the safety rod (4); the bushing (3) is close to the elevator body (1) and drives the safety rod (4) to lock the blocking rod (2); the bushing (3) is away from the elevator body (1) and drives the safety rod (4) to unlock the blocking rod (2); the notch (200) and the opening (100) are both used for allowing a pipe column to enter and exit the elevator body (1).

2. A powered elevator according to claim 1, characterized in that: The elevator body (1) is equipped with a first power cylinder (6), the first power cylinder (6) is drivingly connected to the blocking rod (2), and the first power cylinder (6) drives the blocking rod (2) to perform rotational movement.

3. A powered elevator according to claim 1, characterized in that: The bushing (3) is mounted with a connecting rod (31), the safety rod (4) is provided with a first through hole (41), the connecting rod (31) is passed through the first through hole (41), and the connecting rod (31) drives the safety rod (4) to be raised or lowered.

4. A powered elevator according to claim 1, characterized in that: A first recess (42) is provided at the free end of the safety rod (4), the first recess (42) faces the elevator body (1), and the first recess (42) is used to lock the blocking rod (2).

5. A powered elevator according to claim 1, characterized in that: It also includes a second power cylinder (7) and a limiting rod (8), wherein the second power cylinder (7) is mounted on the elevator body (1), and the second power cylinder (7) is hinged to the limiting rod (8); when the piston rod of the second power cylinder (7) rises, it drives the limiting rod (8) to press down and lock the blocking rod (2); when the piston rod of the second power cylinder (7) falls, it drives the limiting rod (8) to lift up and unlock the blocking rod (2).

6. A powered elevator according to claim 5, characterized in that: A first notch (81) is formed at one end of the limit rod (8), and an open portion of the first notch (81) is hinged to the second power cylinder (7). A first hinge seat (11) is installed on the elevator body (1), and the first hinge seat (11) is located in the first notch (81). The limit rod (8) is hinged to the elevator body (1) via the first hinge seat (11).

7. A powered elevator according to claim 6, characterized in that: The limiting rod (8) comprises a bent portion (82), the bent portion (82) being located at an end of the limiting rod (8) away from the first notch (81), the bent portion being used to lock the blocking rod (2).

8. A powered elevator according to claim 7, characterized in that: A roller (821) is mounted on the free end of the bending portion (82), and the roller (821) is capable of rolling freely relative to the bending portion (82).

9. A powered elevator according to claim 1, characterized in that: Lifting ears (9) are installed on both sides of the lifting card body (1).

10. A remote pressure operation system, characterized in that: It comprises a pressure working machine and a power elevator as described in any one of claims 1 to 9, wherein the pressure working machine is used to remove or install a pipe string in a wellbore under pressure, and the power elevator is used to grab and lift the pipe string.

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