Blowout preventer locking device

Abstract

The present application relates to a kind of blowout preventer locking devices for petroleum well control auxiliary device, including mounting seat, locking rod, automatic drive mechanism and manual drive mechanism;Mounting seat is used to be fixed on blowout preventer;Locking rod is built into mounting seat;Automatic drive mechanism is transmission connection with locking rod, for driving locking rod to drive hydraulic rod axial movement;Manual drive mechanism, the manual drive mechanism is fixedly connected with locking rod, for driving locking rod to drive hydraulic rod axial movement;The transmission path of automatic drive mechanism and locking rod is first transmission path;The transmission path of manual drive mechanism and locking rod is second transmission path;Two paths do not intersect each other.By setting respectively independent, while finally acting on locking rod manual drive mechanism and automatic drive mechanism, without considering what component or problem in automatic drive mechanism has appeared breakdown, failure, it can use manual drive mechanism to guarantee operation safe and reliable completion.

Description

Technical Field

[0001] This invention relates to oil well control auxiliary devices, particularly to gate blowout preventers, and especially to a blowout preventer locking device. Background Technology

[0002] As a core piece of equipment in the wellhead system, the blowout preventer (BOP) is an indispensable facility throughout the entire drilling, workover, and well testing process. The BOP closes and opens under the action of the shut-in hydraulic cylinder. Sometimes, the BOP needs to remain closed for an extended period after shutting in the well, but relying on the hydraulic cylinder to keep it closed for a long time poses a risk. Therefore, a locking mechanism is needed to lock the cylinder rod and prevent movement.

[0003] Currently, locking devices are either manually or automatically locked, such as CN213711012U and CN104912511A. Manual locking is labor-intensive and requires personnel to be close during operation, posing a significant risk. Automatic locking has a complex structure, is prone to failure, and lacks backup measures in case of failure (such as CN104912511A), which is unacceptable for well control safety. Although CN213711012U can be manually locked after failure, the limited size of the sprocket driven by the manual chain results in a small torque arm, and the multi-stage mechanical transmission to the locking rod leads to low efficiency and high labor intensity. These problems with current blowout preventer locking devices mean that their reliability in practical applications still cannot meet the high requirements of construction operations. Summary of the Invention

[0004] The purpose of this invention is to provide a blowout preventer locking device in an attempt to solve the problem of insufficient reliability of manual automatic locking of blowout preventers.

[0005] To solve the above problems or achieve the above objectives, the present invention provides a blowout preventer locking device, including a mounting base fixedly mounted on the blowout preventer; a locking rod built into the mounting base for abutting against the hydraulic rod of the blowout preventer cylinder; an automatic drive mechanism connected to the locking rod for driving the locking rod to move the hydraulic rod axially; and a manual drive mechanism fixedly connected to the locking rod for driving the locking rod to move the hydraulic rod axially; wherein, a first drive component is disposed within the mounting base, the first drive component is threadedly connected to the locking rod, the first drive component is connected to the automatic drive mechanism, and the first drive component is connected to the manual drive mechanism via the locking rod; the transmission path of the automatic drive mechanism, the first drive component, and the locking rod is a first transmission path; the transmission path of the manual drive mechanism, the first drive component, and the locking rod is a second transmission path; the first transmission path and the second transmission path do not intersect.

[0006] The first and second transmission paths mentioned above do not intersect. That is, there are no overlapping components on the entire transmission path from the manual drive mechanism to the locking rod and the entire transmission path from the automatic drive mechanism to the locking rod. In other words, there are no common transmission components in the transmission path. Thus, by setting up this blowout preventer locking device, and by setting up separate manual and automatic drive mechanisms that ultimately act on the locking rod, compared with the current blowout preventer locking device, not only is the structure simpler, but even if the automatic drive mechanism fails or malfunctions, the manual drive mechanism can ensure the safe and reliable completion of the operation without needing to consider which component or problem in the automatic drive mechanism has failed or malfunctioned. This greatly improves the reliability and safety of the device.

[0007] In some feasible embodiments, the automatic drive mechanism has a first contact point at the transmission connection node between the first drive component and the locking rod; the manual drive mechanism has a second contact point at the end transmission connection node of the locking rod; the first contact point and the second contact point are located on the side and end of the locking rod, respectively.

[0008] By applying force at different positions on the locking lever, even if there are problems at the end nodes of the automatic drive mechanism, such as problems in the contact between the side of the locking lever and the end output component of the automatic drive mechanism, the force transmission of the locking lever by the manual drive mechanism will not be affected, thus further improving the safety and reliability of the device.

[0009] In some feasible embodiments, the mounting base is provided with a mating interface corresponding to one end of the locking rod; the manual drive mechanism includes a transmission rod, one end of which is detachably connected to one end of the locking rod. This detachable design facilitates assembly, adjustment, and transportation.

[0010] In some feasible embodiments, the transmission rod includes: a connecting rod; a connecting member, one end of which is connected to one end of the connecting rod, and the other end of which is detachably connected to a locking rod; the connecting member is provided with a sliding groove extending along the axial direction of the locking rod, one end of the connecting rod extending into the sliding groove and slidably connected to the connecting member, and the connecting rod can slide along the extension direction of the sliding groove. By designing the connecting rod to slide along the extension direction of the sliding groove, the transmission mechanism formed by the cooperation of the connecting rod and the connecting member is a component that extends and retracts along the axis of the connecting rod, thus achieving axial compensation.

[0011] In some feasible embodiments, the connector mentioned above includes a connecting end, one end of which is provided with a square hole facing the locking rod, and one end of the locking rod is provided with a square end that matches the square hole; the connecting end and the square end are locked together by a first locking member.

[0012] In some feasible embodiments, the groove of the connector is a non-circular groove, and the connecting rod is provided with a non-circular connector head that matches the non-circular groove. When the non-circular connector head rotates, it drives the locking rod to rotate around its axis through the connector. With the aforementioned arrangement, the connector can conveniently and simply transmit torque to the locking rod, causing the locking rod to move axially.

[0013] In some feasible embodiments, one end of the non-circular connector is fixedly connected to one end of the connecting rod; the connecting rod is a tube, and one end of the non-circular connector is provided with a protrusion extending into the tube. This allows the connecting rod to remain stationary during automatic drive, while the connecting rod can rotate the connector when driven manually.

[0014] In some feasible embodiments, a guide groove extending in the same direction as the slide groove is formed on the side wall of the slide groove; a slide rod is provided on one end of the connecting rod that extends into the slide groove, and a part of the slide rod is fitted in the guide groove for the slide rod to slide in the guide groove.

[0015] In some feasible embodiments, the connecting rod is provided with a second locking member; the second locking member includes: a fixed support; a locking sleeve, the locking sleeve being fixed on the fixed support, and the connecting rod being fitted inside the locking sleeve; and a locking pin, the locking sleeve and the connecting rod being provided with holes adapted to the locking pin.

[0016] In some feasible embodiments, the automatic drive mechanism includes: a drive source disposed on a mounting base; a second drive component connected to the main shaft of the drive source, the drive source driving the second drive component to rotate; a first drive component and a second drive component adapted to each other, the second drive component driving the first drive component to rotate, and the first drive component causing the locking rod to move axially through a threaded engagement.

[0017] In some feasible embodiments, the drive source is configured as an electric motor drive or a hydraulic drive.

[0018] In some feasible embodiments, a handwheel is also included, which is connected to the connecting rod to drive the connecting rod to rotate.

[0019] In some feasible embodiments, the second driving component is configured as a first gear, and the first driving component is configured as a second gear that meshes with the first gear, so that the second driving component drives the first driving component to rotate;

[0020] Alternatively, the second driving component can be configured as a first gear, and the first driving component can be configured as a chain that meshes with the first gear. The first gear is connected to the chain drive, so that the second driving component drives the first driving component to rotate.

[0021] Alternatively, the second drive component can be configured as a sprocket, and the first drive component can be configured as a chain that cooperates with the sprocket. The sprocket and the chain are connected in a drive system so that the second drive component drives the first drive component to rotate.

[0022] Alternatively, the second drive component drives the first drive component to rotate via a coupling.

[0023] Some feasible embodiments include automatic locking and manual locking modes;

[0024] The automatic locking mechanism includes: locking pin locking, connecting rod locking, non-circular connector head preventing rotation, gear on the drive source driving the first drive component to rotate, the first drive component driving the locking rod to move axially through threaded engagement, at this time in order to compensate for axial distance, the locking rod driving the connector to move axially, the connector and non-circular connector head achieve axial distance compensation through sliding;

[0025] The manual locking operation includes: the drive source stops, the gear on the drive source locks with the first drive component, the first drive component remains stationary, the locking pin is removed, the connecting rod is rotated, the connecting rod drives the connecting piece to rotate, the connecting piece drives the locking rod to rotate, the axial movement of the locking rod is achieved through the threaded engagement between the first drive component and the locking rod, and the axial distance compensation is achieved by sliding between the connecting piece and the non-circular connecting head.

[0026] The two locking mechanisms operate independently and without interference, and the manual locking mechanism is activated when the automatic locking mechanism fails.

[0027] By setting up separate manual and automatic drive mechanisms that ultimately act on the locking lever, the manual drive mechanism can ensure the safe and reliable completion of the operation without needing to consider which component or problem in the automatic drive mechanism has failed or malfunctioned. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1This is an overall schematic diagram illustrating the installation of the blowout preventer locking device on the blowout preventer in Embodiments 1 to 4;

[0030] Figure 2 This is a cross-sectional schematic diagram illustrating the installation of the blowout preventer locking device on the blowout preventer in Embodiments 1 to 4;

[0031] Figure 3 This is a cross-sectional schematic diagram illustrating the installation of the blowout preventer locking device on the blowout preventer in Embodiments 1 to 4;

[0032] Figure 4 This is a schematic diagram illustrating the structure of the blowout preventer locking device in Embodiments 1 to 4;

[0033] Figure 5 This is a partial structural diagram illustrating the blowout preventer locking device near the blowout preventer in Embodiments 1 to 4.

[0034] Figure 6 This is a partial structural diagram illustrating the side of the blowout preventer locking device away from the blowout preventer in Embodiments 1 to 4.

[0035] Figure 7 This is a schematic diagram illustrating the connecting member structure in the blowout preventer locking device of Embodiments 1 to 4.

[0036] Figure 8 This is a schematic diagram illustrating the non-circular connector structure in the blowout preventer locking device of Embodiments 1 to 4;

[0037] Figure 9 This is a schematic diagram illustrating the locking rod structure in the blowout preventer locking device of Embodiments 1 to 4;

[0038] Reference numerals: 1-Handwheel, 2-Locking pin, 3-Connector, 310-Connecting end, 320-Slide groove, 321-Guide groove, 322-Slide rod, 311-Square hole, 4-Motor, 5-First gear, 6-Mounting base, 610-Matching interface, 7-Locking sleeve, 8-Connecting rod, 10-First locking element, 11-Second gear, 12-Locking rod, 1210-Square end, 13-Blowout preventer cylinder, 14-Hydraulic rod, 15-Non-circular connector, 1510-Frustum, 16-Fixed support, 100-Automatic drive mechanism, 200-Manual drive mechanism. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0040] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0041] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0043] A blowout preventer (BOP) is used during well testing, workover, and completion operations to close the wellhead and prevent blowouts. It combines full and partial sealing functions into one device, featuring simple structure, ease of operation, and high-pressure resistance. It is a commonly used safety sealing device in oilfields to prevent blowouts. During oil drilling, it is installed on the wellhead casing head to control the flow of high-pressure oil, gas, and water. When the oil and gas pressure inside the well is very high, the BOP can seal the wellhead completely. When heavy mud is injected from the drill pipe, a four-way valve under its gate can replace the mud affected by gas, increasing the pressure of the fluid column inside the well to suppress the ejection of high-pressure oil and gas.

[0044] For the aforementioned blowout preventers, the current locking devices include manual locking or automatic locking. However, in the current case of manual locking, if automatic locking fails, the cause of the failure cannot be detected in time. Furthermore, there may be a linkage between the manual and automatic locking components when manual locking is used, meaning that manual locking may still pose a risk of failure, resulting in an unreliable safety threat. Therefore, this embodiment addresses this situation by providing the following implementation plan.

[0045] Example 1

[0046] Reference Figures 1 to 9 A blowout preventer locking device includes a mounting base 6, a locking rod 12, an automatic drive mechanism 100, and a manual drive mechanism 200. The mounting base 6 is used to fix the device to the blowout preventer. The locking rod 12 is housed within the mounting base 6 and abuts against the hydraulic rod 14 of the blowout preventer cylinder 13. A first drive component is disposed within the mounting base, and the first drive component is threadedly connected to the locking rod. The first drive component is drively connected to the automatic drive mechanism and to the manual drive mechanism via the locking rod. The automatic drive mechanism 100 is fixedly connected to the locking rod 12 and is used to drive the locking rod 12 to drive the hydraulic rod 14 to move axially through the threaded engagement with the first drive component; the manual drive mechanism 200 is driven to the locking rod 12 and is used to drive the locking rod 12 to drive the hydraulic rod 14 to move axially; the transmission path between the automatic drive mechanism 100 and the locking rod 12 is the first transmission path; the transmission path between the manual drive mechanism 200 and the locking rod 12 is the second transmission path; the first transmission path and the second transmission path do not intersect each other.

[0047] The aforementioned mounting base 6 has a chamber in which the locking rod 12 is disposed. The locking rod 12 is fitted inside the chamber of the mounting base 6. The chamber is a through-channel that runs from left to right. The outer circle of the locking rod 12 can slide against the interior of the chamber when locking, that is, it is necessary to ensure that the locking rod can slide within the chamber.

[0048] The mounting base 6 has a mounting part that mates with the automatic drive mechanism 100. This mounting part only needs to ensure that the automatic drive mechanism 100 does not interfere with the manual drive mechanism 200. The automatic drive mechanism 100 can be a drive assembly that transmits power to the locking rod 12 via a motor, transmission rod, gearbox, or worm gear. The locking rod 12 has threads and is driven axially by a lead screw. The manual drive mechanism 200 can be a linkage drive that transmits torque to the locking rod 12 from the other side of the mounting base 6 (the side different from the mounting side of the automatic drive mechanism 100).

[0049] By employing a non-intersecting first and second transmission paths, the components along the entire transmission path from the manual drive mechanism 200 to the locking rod 12 do not overlap with those along the same path from the automatic drive mechanism 100 to the locking rod 12. This eliminates shared transmission components in the transmission paths. Therefore, by designing this blowout preventer locking device with independent manual and automatic drive mechanisms 200 and 100 that ultimately act on the locking rod 12, compared to current blowout preventer locking devices, the structure is not only simpler but also ensures safe and reliable operation even if the automatic drive mechanism 100 malfunctions or fails.

[0050] Specifically, the automatic drive mechanism 100 establishes a first contact point A at the end of the locking rod 12 via the first drive component; the manual drive mechanism 200 establishes a second contact point B at the end of the locking rod 12; the first contact point A and the second contact point B are located on the side and end of the locking rod 12, respectively. By applying force at different positions on the locking rod 12, even if the drive source of the automatic drive mechanism 100 fails, the force transmission of the manual drive mechanism 200 to the locking rod 12 will not be affected, further enhancing the safety and reliability of the device.

[0051] Example 2

[0052] Reference Figures 2 to 9 Based on Embodiment 1, the mounting base 6 is provided with a mating interface 610 corresponding to one end of the locking rod 12; the manual drive mechanism 200 includes a transmission rod, one end of which is detachably connected to the locking rod 12 through the mating interface 610, adopting a detachable method to facilitate assembly, adjustment and transportation.

[0053] The transmission rod includes a connecting rod 8 and a connecting member 3; one end of the connecting member 3 is connected to one end of the connecting rod 8, and the other end is detachably connected to the locking rod 12; the connecting member 3 is provided with a groove 320 extending along the axial direction of the locking rod 12, and one end of the connecting rod 8 extends into the groove 320 and is slidably connected to the connecting member 3 via a sliding rod 322, so that the connecting rod 8 can slide along the extension direction of the groove 320. By designing the connecting rod 8 to slide along the extension direction of the groove 320, the transmission mechanism formed by the cooperation of the connecting rod 8 and the connecting member 3 is a component that extends and retracts along the axis of the connecting rod 8.

[0054] The connector 3 includes a connecting end 310, one end of which facing the locking rod 12 is provided with a square hole 311, and one end of the locking rod 12 is provided with a square end 1210 that is adapted to the square hole 311; the connecting end 310 and the square end 1210 are locked together by the first locking member 10; the mounting base 6 is provided with a component that is threadedly engaged with the locking rod 12, which is used to drive the locking rod 12 to rotate when the connector 3 rotates around the axis of the locking rod 12, so that the locking rod 12 moves axially.

[0055] The first locking element 10 here can be a pin, with corresponding pin holes provided on one end of the connecting end 310 and the locking rod 12. The pin is inserted into the pin hole to complete the locking. Alternatively, the first locking element 10 can be a bolt, with corresponding screw holes or through holes provided on one end of the connecting end 310 and the locking rod 12. The connecting end 310 and the locking rod 12 are locked together by the bolt.

[0056] The groove 320 of the connector 3 is a non-circular groove. The connecting rod 8 is provided with a non-circular connector 15 that is adapted to the non-circular groove. When the non-circular connector 15 is rotated, it causes the connector 3 to rotate around the axis of the locking rod 12. The mounting base 6 is provided with a component that is threadedly engaged with the locking rod 12. When the connector 3 rotates around the axis of the locking rod 12, it causes the locking rod 12 to rotate, thus making the locking rod 12 move axially. With the aforementioned arrangement, the connector 3 can conveniently and simply transmit torque to the locking rod 12, causing the locking rod 12 to move axially. The connection between the non-circular connector 15 and the connecting rod 8 can be of various forms. The ultimate goal is to achieve the technical effect of restricting its rotation. For example, a flange connection, or a pipe body at the end of the connecting rod with one end of the connector body fitted and fixed to the pipe body, or other connection methods that can achieve this fixed connection effect are all acceptable. It is not limited to the fit between the pipe body and the frustum.

[0057] The aforementioned non-circular connector 15 has one end movably connected to the other end; the aforementioned is a tube body, and one end of the aforementioned non-circular connector 15 is provided with a frustum 1510 extending into the tube body. In this way, when the automatic drive mechanism 100 is running, the connecting rod 8 does not rotate actively, and when the manual drive mechanism 200 is driven, the connecting rod 8 can drive the connector to rotate.

[0058] The side wall of the slide groove 320 has a guide groove 321 extending in the same direction as the slide groove 320; the connecting rod 8 extends into the slide groove 320 and is slidably connected to the connecting member 3 through a slide rod 322. A portion of the slide rod 322 fits into the guide groove 321 for sliding within the guide groove 321. The slide rod 322 can be a threaded rod that passes through the guide groove 321 and is locked at both ends with nuts after insertion; similarly, it can also be a screw that is locked at one end with a nut after insertion.

[0059] Example 3

[0060] Reference Figures 2 to 9 Based on embodiment 1 or 2, a second locking element is provided on the connecting rod 8. The second locking element includes a fixed support 16, a locking sleeve 7, and a locking pin 2. The locking sleeve 7 is fixed to the fixed support 16, and the connecting rod 8 is fitted inside the locking sleeve 7. The locking sleeve 7 and the connecting rod 8 are provided with holes that fit the locking pin 2, so that when the automatic drive mechanism 100 drives the locking rod 12, the manual drive mechanism 200 is locked, ensuring that the automatic drive mechanism 100 is not interfered with by the manual drive mechanism 200 during operation. The other end of the connecting rod 8 is connected to a handwheel 1, which is used to drive the connecting rod 8 to rotate along its axis when driven.

[0061] Example 4

[0062] The automatic drive mechanism includes: a drive source, which is mounted on a mounting base; a second drive component, which is connected to the main shaft of the drive source, and the drive source drives the second drive component to rotate; a first drive component and a second drive component are adapted to each other, and the second drive component drives the first drive component to rotate, and the first drive component causes the locking rod to move axially through a threaded engagement.

[0063] The drive source is set to motor 4 or hydraulic drive. It also includes a handwheel 1, which is connected to the connecting rod 8 to drive the connecting rod 8 to rotate.

[0064] Reference Figures 2 to 9 Based on embodiment 1, 2, or 3, the above-mentioned automatic drive mechanism 100 includes a motor 4, a first gear 5, and a second gear 11; the motor 4 is mounted on the mounting base 6; the first gear 5 is rotatably connected to the main shaft of the motor 4, and the motor 4 is used to drive the first gear 5 to rotate; the second gear 11 is rotatably sleeved on the locking rod 12, the second gear 11 meshes with the first gear 5, and the second gear 11 is threadedly sleeved on the locking rod 12, so that the locking rod 12 can move axially when the second gear 11 rotates.

[0065] In use, the locking pin 2 is inserted into the corresponding holes of the locking sleeve 7 and the connecting rod 8, and the handwheel 1 and the locking rod 12 are in a rotationally locked state. At this time, the locking rod 12 will not rotate and is in an automatically locking usable state. The control system controls the motor 4 to rotate, and the first gear 5 rotates synchronously. The first gear 5 drives the second gear 11 to rotate, and the locking rod 12 does not rotate. This pushes the locking rod 12 to move axially, pressing against or releasing the hydraulic cylinder rod 14, thereby realizing automatic locking or unlocking.

[0066] When motor 4 is locked or the hydraulic system fails, motor 4 self-locks. At this time, the first gear 5 and the second gear 11 are locked and cannot rotate. Pull out the locking pin 2 and turn the handwheel 1. The handwheel 1 and the locking rod 12 rotate synchronously, pushing the locking rod 12 to move axially, pressing against or releasing the hydraulic cylinder rod 14, thereby realizing manual locking or unlocking.

[0067] The second driving component is configured as a first gear 5, and the first driving component is configured as a second gear 11 that meshes with the first gear 5. The first gear 5 and the second gear 11 mesh so that the second driving component drives the first driving component to rotate.

[0068] Alternatively, the second driving component can be configured as the first gear 5, and the first driving component can be configured as a chain that meshes with the first gear 5. The first gear 5 is connected to the chain drive, so that the second driving component drives the first driving component to rotate.

[0069] Alternatively, the second drive component can be configured as a sprocket, and the first drive component can be configured as a chain that cooperates with the sprocket. The sprocket and the chain are connected in a transmission manner so that the second drive component drives the first drive component to rotate.

[0070] Alternatively, the second drive component drives the first drive component to rotate via a coupling.

[0071] The device described in this embodiment includes both an automatic locking mode and a manual locking mode. The automatic locking mode includes: locking pin 2, locking connecting rod 8, preventing rotation of the non-circular connector, gears on the drive source driving the first drive component to rotate, and the first drive component driving the locking rod axially via a threaded engagement. To compensate for axial distance, the locking rod 12 drives the connecting piece 3 axially, and the connecting piece 3 and the non-circular connector slide to achieve axial distance compensation. The manual locking mode includes: the drive source stopping, gears on the drive source locking the first drive component, the first drive component remaining stationary, locking pin 2 being removed, rotating connecting rod 8, which drives the connecting piece 3 to rotate, and the connecting piece 3 driving the locking rod 12 to rotate. Axial movement of the locking rod is achieved through the threaded engagement between the first drive component and the locking rod, and axial distance compensation is achieved through sliding between the connecting piece and the non-circular connector. The two locking modes operate independently and without interference, and the manual locking mechanism is activated when the automatic locking mechanism fails.

[0072] When the manual locking device is engaged, the first transmission path is kept clear, and the locking rod 12 does not rotate with the second gear. This allows the rotation of the second gear to be converted into axial movement of the locking rod 12 via the thread, thus compensating for axial displacement. When the automatic locking mechanism is engaged, the second path is kept clear, the second gear is locked and does not rotate, and the locking rod 12 rotates with the connecting rod 8. Axial movement is achieved through the engagement with the thread, and axial displacement is compensated through the structure of the weight 8.

[0073] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A blowout preventer locking device, characterized in that, include: Mounting bracket, which is fixedly mounted on the blowout preventer; Locking rod, which is built into the mounting base, is used to abut against the hydraulic rod of the blowout preventer cylinder; An automatic drive mechanism, which is connected to the locking rod transmission, is used to drive the locking rod to move the hydraulic rod axially; and A manual drive mechanism, which is fixedly connected to the locking rod, is used to drive the locking rod to move the hydraulic rod axially. A first driving component is disposed within the mounting base. The first driving component is threadedly connected to the locking rod. The first driving component is driven by the automatic driving mechanism and is also driven by the manual driving mechanism via the locking rod. The transmission path of the automatic drive mechanism, the first drive component, and the locking rod is the first transmission path; The transmission path of the manual drive mechanism, the first drive component, and the locking rod is the second transmission path; The first transmission path and the second transmission path do not intersect each other; The mounting base is provided with a mating interface corresponding to one end of the locking rod; The manual drive mechanism includes a transmission rod, one end of which is detachably connected to one end of the locking rod; The transmission rod includes: Connecting rod; A connector, one end of which is connected to one end of a connecting rod, and the other end of which is detachably connected to a locking rod; The connector is provided with a sliding groove extending along the axial direction of the locking rod. One end of the connecting rod extends into the sliding groove and is slidably connected to the connector. The connecting rod can slide along the extension direction of the sliding groove. The automatic drive mechanism includes: A drive source, wherein the drive source is disposed on the mounting base; The second driving component is connected to the main shaft of the driving source, and the driving source drives the second driving component to rotate; the first driving component is adapted to the second driving component, and the second driving component drives the first driving component to rotate; the first driving component causes the locking rod to move axially through a threaded engagement.

2. The blowout preventer locking device according to claim 1, characterized in that, The automatic drive mechanism uses the transmission connection node between the first drive component and the locking rod as the first contact point; The manual drive mechanism and the end transmission connection node of the locking rod are the second contact point; The first contact point and the second contact point are located on the side and end of the locking rod, respectively.

3. The blowout preventer locking device according to claim 1, characterized in that, The connector includes a connecting end, one end of which is provided with a square hole facing the locking rod, and one end of the locking rod is provided with a square end that matches the square hole; The connecting end and the square end are locked together by a first locking member.

4. The blowout preventer locking device according to claim 1, characterized in that, The groove of the connector is a non-circular groove, and the connecting rod is provided with a non-circular connector head that is adapted to the non-circular groove. When the non-circular connector head rotates, it drives the locking rod to rotate around the axis through the connector.

5. The blowout preventer locking device according to claim 4, characterized in that, One end of the non-circular connector is fixedly connected to one end of the connecting rod; The connecting rod is a tube, and one end of the non-circular connector is provided with a boss that extends into the tube.

6. The blowout preventer locking device according to claim 1, characterized in that, The sidewall of the slide has a guide groove extending in the same direction as the slide. A sliding rod is provided on one end of the connecting rod that extends into the sliding groove. A portion of the sliding rod is fitted into the guide groove for sliding within the guide groove.

7. The blowout preventer locking device according to claim 5, characterized in that, A second locking element is provided on the connecting rod; The second locking element includes: Fixed support; A locking sleeve is fixed to a fixed support, and the connecting rod is fitted inside the locking sleeve. The locking pin, the locking sleeve and the connecting rod are provided with holes that are adapted to the locking pin.

8. The blowout preventer locking device according to claim 1, characterized in that, The drive source is set to electric motor drive or hydraulic drive.

9. The blowout preventer locking device according to claim 1, characterized in that, It also includes a handwheel, which is connected to the connecting rod to drive the connecting rod to rotate.

10. The blowout preventer locking device according to claim 1, characterized in that, The second driving component is configured as a first gear, and the first driving component is configured as a second gear that meshes with the first gear. The first gear and the second gear mesh so that the second driving component drives the first driving component to rotate. Alternatively, the second driving component can be configured as a first gear, and the first driving component can be configured as a chain that meshes with the first gear. The first gear is connected to the chain drive, so that the second driving component drives the first driving component to rotate. Alternatively, the second drive component can be configured as a sprocket, and the first drive component can be configured as a chain that cooperates with the sprocket. The sprocket and the chain are connected in a drive system so that the second drive component drives the first drive component to rotate. Alternatively, the second drive component drives the first drive component to rotate via a coupling.

11. The blowout preventer locking device according to claim 7, characterized in that, Including automatic locking and manual locking modes; The automatic locking mechanism includes: locking pin locking, connecting rod locking, non-circular connector head preventing rotation, gear on the drive source driving the first drive component to rotate, the first drive component driving the locking rod to move axially through threaded engagement, at this time in order to compensate for axial distance, the locking rod driving the connector to move axially, the connector and non-circular connector head achieve axial distance compensation through sliding; The manual locking operation includes: the drive source stops, the gear on the drive source locks with the first drive component, the first drive component remains stationary, the locking pin is removed, the connecting rod is rotated, the connecting rod drives the connecting piece to rotate, the connecting piece drives the locking rod to rotate, the axial movement of the locking rod is achieved through the threaded engagement between the first drive component and the locking rod, and the axial distance compensation is achieved by sliding between the connecting piece and the non-circular connecting head. The two locking modes operate independently and do not interfere with each other. The manual locking mode is activated when the automatic locking mode fails.

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