High-low-speed full-hydraulic automatic variable torque output device

Abstract

The invention discloses a high-low-speed full-hydraulic automatic variable torque output device, relates to the technical field of blowout preventer maintenance tools, and aims to solve the problem that the efficiency is low when a blowout preventer is disassembled and assembled by only using a hydraulic wrench, the high-low-speed full-hydraulic automatic variable torque output device comprises a fixing plate, and a lengthening rod is connected to the fixing plate; an inner hexagonal sleeve is installed at the end, away from the fixing plate, of the lengthening rod, a hydraulic wrench is installed on the surface of the side, away from the lengthening rod, of the fixing plate, and the output end of the hydraulic wrench is fixedly connected with the lengthening rod so as to drive the lengthening rod to rotate; a hydraulic motor is further installed on the surface of the side, close to the hydraulic wrench, of the fixing plate, and the output end of the hydraulic motor is connected with the lengthening rod through a gear in an engaged mode.

Description

Technical Field

[0001] The invention relates to the technical field of blowout preventer maintenance tools, and in particular to a high- and low-speed fully hydraulic automatic variable torque output device. Background Art

[0002] Blowout preventers are one of the most critical safety equipment in oil and gas drilling operations. They are mainly used to seal and control wellbore pressure during the drilling process to prevent blowouts.

[0003] The working pressure of a blowout preventer is usually 2000psi, 3000psi, 5000psi, and 10000psi. The higher the pressure, the thicker the wall and the heavier it is. Its weight usually ranges from about 2 tons to 25 tons. Due to its large size, when disassembling and repairing the blowout preventer, it is usually necessary to use a hydraulic wrench to remove the bolts and nuts. A hydraulic wrench is a device that applies precise and huge torque and is mainly used to tighten or loosen large bolts and nuts.

[0004] Because hydraulic wrenches are designed to output high torque, their speed is relatively low. High torque is not required throughout the entire process of tightening or loosening bolts and nuts. High torque is only needed in the later stages of tightening to achieve a firm connection, and similarly, only in the early stages of loosening. Therefore, simply using a hydraulic wrench to disassemble and assemble existing blowout preventers is undoubtedly inefficient. Summary of the Invention

[0005] In order to solve the above problem, namely the low efficiency of disassembling and assembling the blowout preventer using only a hydraulic wrench, the present invention proposes a high-low speed fully hydraulic automatic variable torque output device, which includes a fixed plate, an extension rod is connected to the fixed plate, and a hexagonal sleeve is installed at one end of the extension rod away from the fixed plate. A hydraulic wrench is installed on the side surface of the fixed plate away from the extension rod, and the output end of the hydraulic wrench is fixedly connected to the extension rod for driving the extension rod to rotate. A hydraulic motor is also installed on the side surface of the fixed plate close to the hydraulic wrench, and the output end of the hydraulic motor is connected to the extension rod through gear meshing.

[0006] The present invention is further configured as follows: a large gear is connected to the extension rod, a small gear is connected to the output end of the hydraulic motor, and the large gear is meshed with the small gear.

[0007] The present invention also proposes a high- and low-speed fully hydraulic automatic variable torque output device, comprising a fixed plate, an extension rod connected to the fixed plate, an inner hexagonal sleeve installed at one end of the extension rod away from the fixed plate, a hydraulic wrench installed on the surface of the side of the fixed plate away from the extension rod, the output end of the hydraulic wrench is fixedly connected to the extension rod for driving the extension rod to rotate, and a hydraulic motor is also installed on the hydraulic wrench, the output end of the hydraulic motor is coaxially connected to the extension rod for driving the extension rod to rotate accordingly.

[0008] The present invention is further configured as follows: an outer shell is also provided on the extension rod, the outer shell is rotatably connected to the extension rod, a stop rod is provided at one end of the outer shell close to the sleeve, and the stop rod is arranged perpendicular to the extension rod; the outer shell is fixedly connected to the fixing plate at one end close to the fixing plate, and the outer shell is fixedly connected to the lifting equipment.

[0009] The present invention is further configured as follows: a quick-change fixture is connected to the outer shell for quick assembly and disassembly with the lifting equipment.

[0010] The present invention is further configured as follows: torque sensor 1 and torque sensor 2 are respectively installed inside the hydraulic wrench and the hydraulic motor, torque sensor 1 and torque sensor 2 are electrically connected to a control module, and the output end of the control module is electrically connected to the control end of the hydraulic wrench and the hydraulic motor.

[0011] The beneficial effects of the present invention are:

[0012] 1. By using the hydraulic wrench in conjunction with the hydraulic motor, it is possible to switch to the hydraulic wrench when a large torque is required to achieve the purpose of tightening or loosening. When a large torque is not required, it can be switched to the hydraulic motor for rapid rotation, thereby improving the efficiency of disassembly and assembly.

[0013] 2. The stop rod can abut against the blowout preventer body when tightening the bolts or nuts, so that the torque generated during the tightening process can be transferred to the blowout preventer body by the stop rod, preventing the torque from acting entirely on the lifting equipment, thereby further achieving the purpose of protecting the lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure of Example 1 is shown Figure 1 .

[0015] Figure 2 The structure of Example 1 is shown Figure 2 .

[0016] Figure 3 An exploded view of Example 1 is shown.

[0017] Figure 4 The figure shows the structure of the embodiment 1 after the outer shell is removed.

[0018] Figure 5 A structural diagram of Example 2 is shown.

[0019] Figure 6 A control system diagram is shown.

[0020] Figure numerals: 1. Fixed plate; 2. Extension rod; 21. Sleeve; 22. Large gear; 3. Hydraulic wrench; 31. Torque sensor 1; 4. Hydraulic motor; 41. Small gear; 42. Torque sensor 2; 5. Outer shell; 51. Gear lever; 52. Quick-change fixture; 6. Control module. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] Example 1

[0023] refer to Figure 1 、 4 The present invention proposes a high-low speed fully hydraulic automatic variable torque output device, which includes a fixed plate 1, which is used to be fixedly connected to the lifting equipment of the maintenance platform. An extension rod 2 is connected to the fixed plate 1, and the two ends of the extension rod 2 are respectively arranged on both sides of the fixed plate 1. The extension rod 2 and the fixed plate 1 are rotatably arranged through bearings. A sleeve 21 is installed at the end of the extension rod 2 away from the fixed plate 1. The interior of the sleeve 21 is configured as an inner hexagonal shape to adapt to the bolts and nuts on the blowout preventer. The end of the extension rod 2 connected to the sleeve 21 is configured as a square prism shape. The sleeve 21 is provided with a square hole that matches the square prism shape at the end close to the extension rod 2, so that the sleeve 21 is connected to the extension rod 2 through the cooperation between the square hole and the square prism.

[0024] A hydraulic wrench 3 is connected to the surface of the fixing plate 1 on the side away from the extension rod 2 by bolts. The output end of the hydraulic wrench 3 is coaxially connected to the extension rod 2 and can realize transmission, that is, the hydraulic wrench 3 can drive the extension rod 2 to rotate accordingly, thereby realizing the disassembly and assembly process of the bolts and nuts on the blowout preventer.

[0025] refer to Figure 2 、 3A hydraulic motor 4 is also installed on the surface of one side of the fixed plate 1 on which the hydraulic wrench 3 is installed. The hydraulic motor 4 is also connected to the fixed plate 1 by bolts. The hydraulic motor 4 is connected to the extension rod 2 through gear meshing, that is, a large gear 22 is coaxially sleeved on the extension rod 2, and the large gear 22 is circumferentially fixed to the extension rod 2 by a key and a keyway. The output end of the hydraulic motor 4 is rotatably connected to the fixed rod through a bearing, and a small gear 41 is also coaxially sleeved on its output end. The small gear 41 is also circumferentially fixed to the output end of the hydraulic motor 4 by a key and a keyway. The large gear 22 is meshed with the small gear 41, thereby realizing the transmission connection between the hydraulic motor 4 and the extension rod 2.

[0026] When a large torque needs to be output, the hydraulic wrench 3 works to drive the extension rod 2 to rotate at a low speed with a large torque output. At this time, the hydraulic motor 4 follows but does not do work under the action of the large gear 22 and the small gear 41. When a large torque is not needed, the hydraulic motor 4 works and drives the extension rod 2 to rotate at a high speed with a small torque output through the engagement of the large gear 22 and the small gear 41. At this time, the hydraulic wrench 3 follows but does not do work.

[0027] The extension rod 2 is also coaxially mounted with an outer sleeve 5. The end of the outer sleeve 5 proximal to the fixed plate 1 is welded to the fixed plate 1, while the end of the outer sleeve 5 facing away from the fixed plate 1 is rotatably connected to the extension rod 2 via a bearing. A retaining rod 51 is fixedly connected to the end of the outer sleeve 5 facing away from the fixed plate 1. The retaining rod 51 is positioned perpendicular to the extension rod 2. The fixed plate 1 is fixedly connected to the lifting equipment via the outer sleeve 5. During operation, the retaining rod 51 can contact the blowout preventer, transferring the high torque generated by tightening the bolts and nuts on the blowout preventer to the blowout preventer body, preventing the high torque from being fully applied to the lifting equipment. It should be noted that the maintenance platform and lifting equipment proposed in this application are specifically referenced in Chinese Patent Application No. CN117655990B, entitled Integrated Drilling BOP Maintenance Platform. The lifting equipment has a long boom, and the transfer of torque to the blowout preventer body via the retaining rod 51 prevents damage or tipping of the lifting equipment caused by high torque.

[0028] The outer shell 5 is mounted with a quick-change fixture 52 , and the lifting device is also mounted with a corresponding quick-change fixture 52 , so that the lifting device can quickly realize the disassembly and assembly process with the outer shell 5 .

[0029] refer to Figure 6The hydraulic wrench 3 and the hydraulic motor 4 are respectively installed with a torque sensor 1 31 and a torque sensor 2 42. The torque sensor 1 31 and the torque sensor 2 42 are respectively used to detect the output torque of the hydraulic wrench 3 and the hydraulic motor 4. The torque sensor 1 31 and the torque sensor 2 42 are electrically connected to a control module 6. The control module 6 uses a PLC programming controller. The output end of the control module 6 is electrically connected to the control end of the hydraulic wrench 3 and the hydraulic motor 4. The control module 6 controls the opening and closing of the hydraulic wrench 3 and the hydraulic motor 4 based on the torque signals of the torque sensor 1 31 and the torque sensor 2 42.

[0030] When tightening the bolts and nuts on the blowout preventer, the hydraulic motor 4 is initially turned on, so that the extension rod 2 can rotate in the form of high speed and small torque, thereby driving the bolts and nuts to feed quickly. When the bolts and nuts are rotated to a certain extent, a certain torque is required. At this time, under the detection of the torque sensor 2 42, the control module 6 can detect the output torque of the hydraulic motor 4. When the set value is reached, the control module 6 will output closing and opening signals to the hydraulic motor 4 and the hydraulic wrench 3 respectively, so that the hydraulic wrench 3 is turned on and the hydraulic motor 4 is turned off. Then, the hydraulic wrench 3 can drive the extension rod 2 to rotate in the form of low speed and high torque until the bolts and nuts are tightened.

[0031] On the contrary, when loosening the bolts and nuts on the blowout preventer, the above process is the opposite.

[0032] Example 2

[0033] refer to Figure 5 The only difference between this embodiment and embodiment 1 is that a hydraulic motor 4 is connected to the surface of the hydraulic wrench 3 on the side facing away from the fixed plate 1 by bolts, the output shaft of the hydraulic motor 4 is coaxially arranged with the extension rod 2, and the output shaft of the hydraulic motor 4 is transmission-connected to the extension rod 2 via a key connection, so as to drive the extension rod 2 to rotate accordingly.

[0034] In summary, the present invention utilizes the hydraulic wrench 3 in conjunction with the hydraulic motor 4, enabling the hydraulic wrench 3 to be used for tightening or loosening when high torque is required, while the hydraulic motor 4 can be switched to for rapid rotation when high torque is not required, thereby improving assembly and disassembly efficiency. The retaining rod 51 abuts against the BOP body when tightening a bolt or nut, allowing the torque generated during the tightening process to be transferred to the BOP body by the retaining rod 51, preventing the entire torque from being applied to the lifting equipment, thereby further protecting the lifting equipment.

[0035] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner as long as no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0036] In the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are intended solely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not intended to indicate or imply relative importance.

[0037] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0039] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A high-low speed fully hydraulic automatic variable torque output device, characterized by: The invention comprises a fixed plate (1), an extension rod (2) is connected to the fixed plate (1), an inner hexagon socket (21) is installed on one end of the extension rod (2) away from the fixed plate (1), a hydraulic wrench (3) is installed on the surface of the side of the fixed plate (1) away from the extension rod (2), the output end of the hydraulic wrench (3) is fixedly connected to the extension rod (2) for driving the extension rod (2) to rotate, and a hydraulic motor (4) is also installed on the surface of the side of the fixed plate (1) close to the hydraulic wrench (3), and the output end of the hydraulic motor (4) is connected to the extension rod (2) through gear meshing.

2. The high- and low-speed fully hydraulic automatic variable torque output device according to claim 1, characterized in that: The extension rod (2) is connected to a large gear (22), the output end of the hydraulic motor (4) is connected to a small gear (41), and the large gear (22) is meshedly connected with the small gear (41).

3. A high-low speed fully hydraulic automatic variable torque output device, characterized by: The invention comprises a fixed plate (1), an extension rod (2) is connected to the fixed plate (1), a hexagonal sleeve (21) is installed on one end of the extension rod (2) away from the fixed plate (1), a hydraulic wrench (3) is installed on the surface of the side of the fixed plate (1) away from the extension rod (2), the output end of the hydraulic wrench (3) is fixedly connected to the extension rod (2) for driving the extension rod (2) to rotate, and a hydraulic motor (4) is also installed on the hydraulic wrench (3), the output end of the hydraulic motor (4) is coaxially connected to the extension rod (2) for driving the extension rod (2) to rotate accordingly.

4. The high-low speed fully hydraulic automatic variable torque output device according to claim 1 or 3, characterized in that: The extension rod (2) is also provided with an outer shell (5), the outer shell (5) is rotatably connected to the extension rod (2), and a stop rod (51) is provided at one end of the outer shell (5) close to the sleeve (21), and the stop rod (51) is arranged perpendicular to the extension rod (2); the outer shell (5) is fixedly connected to the fixing plate (1) at one end close to the fixing plate, and the outer shell (5) is fixedly connected to the lifting device.

5. The high- and low-speed fully hydraulic automatic variable torque output device according to claim 4, characterized in that: The outer shell (5) is connected to a quick-change fixture (52) for quick assembly and disassembly with the lifting equipment.

6. The high-low speed fully hydraulic automatic variable torque output device according to claim 1 or 3, characterized in that: A torque sensor 1 (31) and a torque sensor 2 (42) are installed inside the hydraulic wrench (3) and the hydraulic motor (4), respectively. The torque sensor 1 (31) and the torque sensor 2 (42) are electrically connected to a control module (6). The output end of the control module (6) is electrically connected to the control end of the hydraulic wrench (3) and the hydraulic motor (4).

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