Detachable transmission device for manual locking rod of blowout preventer

Abstract

The utility model discloses a detachable transmission device for a manual locking rod of a blowout preventer. The detachable transmission device comprises a hand wheel, a transmission rod, a first adapter and a second adapter which are connected in sequence, the second adapter is coaxially fixed on a locking rod of the blowout preventer; a limiting structure and a slide way are formed on the second adapter; the slideway is provided with an entrance and communicates with the limiting structure; one end of the limiting structure extends in the direction close to the sleeving end and forms a stop surface; the first adapter is provided with a limiting piece, and the limiting piece is configured to be capable of sliding in the extending direction of the sliding way and being capable of entering and exiting between the limiting structure and the sliding way in a switchable mode in the process that the first adapter rotates to be screwed in or screwed out relative to the second adapter. The first adapter and the second adapter can be quickly mounted or dismounted, so that the transmission rod can be quickly mounted on the locking rod, the transmission rod can be quickly dismounted from the locking rod, and the mounting and dismounting are convenient and quick.

Description

Technical Field

[0001] This utility model relates to the technical field of transmission rods connecting the locking rod and handwheel on a blowout preventer, and particularly to a detachable transmission device for the manual locking rod of a blowout preventer. Background Technology

[0002] As the core equipment of the wellhead system, the blowout preventer is an indispensable device in the entire process of drilling, well workover, and oil testing. The blowout preventer is closed and opened by the shut-in hydraulic cylinder.

[0003] Chinese Patent (Application Publication No.: CN116607912A) discloses a blowout preventer locking device, including a mounting base fixed on the blowout preventer and a locking rod disposed in the mounting base; it also includes a handwheel and a transmission rod connected between the handwheel and the locking rod, the transmission rod and the locking rod being inserted into each other and fixedly connected by a pin, the handwheel driving the transmission rod to rotate, the transmission rod transmitting torque to the locking rod, and the locking rod driving the hydraulic rod to move axially.

[0004] When a blowout preventer malfunctions and needs to be returned to the factory for repair, it is usually necessary to remove the long drive rod from the locking rod before transportation to facilitate transport. However, in the aforementioned patent, because the drive rod and locking rod are connected by a plug and locked with a pin, removing the drive rod from the blowout preventer is very inconvenient and reduces maintenance efficiency. Utility Model Content

[0005] This utility model provides a detachable transmission device for the manual locking rod of a blowout preventer, which aims to enable quick installation or removal of the transmission rod from the locking rod.

[0006] This utility model provides a detachable transmission device for the manual locking rod of a blowout preventer, comprising a handwheel, a transmission rod, a first adapter, and a second adapter connected in sequence; the second adapter is coaxially fixed on the locking rod of the blowout preventer.

[0007] A limiting structure and a slide are formed on the second adapter near the sleeve end for coaxial connection with the first adapter; one end of the slide has an inlet and an outlet, and the other end extends along a preset trajectory and connects to the limiting structure; one end of the limiting structure extends toward the sleeve end and forms a stop surface.

[0008] The first adapter is provided with a limiting member. The limiting member is configured to slide along the extension direction of the slide rail and switchably enter and exit between the limiting structure and the slide rail during the process of the first adapter rotating to screw into or out relative to the second adapter.

[0009] When the limiting member is embedded in the limiting structure, the first adapter and the second adapter are connected and can transmit force and torque through the limiting member and the limiting structure; when the limiting member moves out of the limiting structure and enters the slide, the limiting member can be moved out of the inlet and outlet so that the first adapter and the second adapter can be separated.

[0010] In one embodiment, the second adapter is provided with an elastic retaining member;

[0011] When the first adapter is connected to the second adapter, the elastic retainer applies an elastic force to the first adapter, and the first adapter, under the action of the elastic force, can keep the limiting member in a locked position against the stop surface.

[0012] In one embodiment, the elastic retainer is a constant force compression spring.

[0013] In one embodiment, a mounting cavity is formed within the second adapter, and the elastic retainer is disposed within the mounting cavity;

[0014] One end of the first adapter extends into the mounting cavity and acts on the elastic retainer.

[0015] In one embodiment, a rounded corner is formed on the side of the mounting cavity near the socket end; and / or,

[0016] The end of the first adapter that extends into the mounting cavity has a rounded corner.

[0017] In one embodiment, the limiting structure has two opposing sidewalls spaced apart circumferentially along the second adapter;

[0018] When the limiting member is embedded in the limiting structure, the first adapter and the second adapter transmit circumferential torque to the two opposite side walls through the limiting member.

[0019] In one embodiment, the limiting structure is a limiting groove with an opening formed on the second adapter;

[0020] The slide rail connects to the opening of the limiting groove, and the stop surface is formed on the inner wall of the limiting groove away from the opening; the limiting member is a limiting pin.

[0021] In one implementation, the stop surface is adapted to the shape of the outer wall of the limiting pin.

[0022] In one implementation, the end of the slide away from the limiting structure passes through the end face of the sleeve end, thereby forming the entrance / exit.

[0023] In one embodiment, the slide includes:

[0024] The first slide section has the inlet / outlet located at one end of the first slide section, and the other end extending spirally away from the sleeve end;

[0025] The second slide section has one end connected to the first slide section, and the other end extends spirally toward the sleeve end and connects to the limiting structure.

[0026] The basic operating principle of the detachable transmission device for the manual locking lever of the blowout preventer in this embodiment of the invention is as follows:

[0027] Installation of the transmission rod and locking rod: Connect the first adapter fixed to one end of the transmission rod to the second adapter fixed to the locking rod, so that the limiting member enters the slide from the inlet and outlet of the slide; rotate and press the first adapter and screw it into the second adapter. During this process, the limiting member can slide along the extension direction of the slide, while the first adapter abuts against the elastic retainer and causes the elastic retainer to deform elastically; when the limiting member enters the limiting groove, the elastic retainer resets under its own elastic force and abuts the limiting member against the stop surface of the limiting groove.

[0028] This achieves the installation connection between the first and second adapter components. Turning the handwheel causes the transmission rod to rotate, transmitting torque sequentially to the first adapter component, the second adapter component, and the locking rod, thereby causing the locking rod to rotate around its axis.

[0029] Disassembly of the transmission rod and locking rod: Press the handwheel, and the transmission rod will press the first adapter axially, causing the first adapter to retract axially relative to the second adapter. The limiting member will move out of the limiting groove and into the slide. Under the elastic force of the elastic retaining member, the first adapter will rotate out from the second adapter. During this process, the limiting member can slide along the slide and disengage from the inlet and outlet, thereby separating the first adapter from the second adapter. In this way, the transmission rod can be removed from the locking rod.

[0030] Therefore, the first and second adapters can be quickly disassembled and assembled, enabling the rapid disassembly and assembly of the transmission rod and the locking rod. Attached Figure Description

[0031] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the detachable transmission device for the manual locking lever of the blowout preventer.

[0033] Figure 2 This is a schematic diagram of the structure after the first and second adapters are installed;

[0034] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0035] Figure label:

[0036] 1. Handwheel;

[0037] 2. Transmission rod;

[0038] 3. First adapter; 31. Limiting component;

[0039] 4. Second adapter; 41. Limiting groove; 42. Slide rail; 421. Entrance / exit; 4201. First slide section; 4202. Second slide section; 43. Socket end;

[0040] 5. Elastic retaining components;

[0041] 6. Capping. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings.

[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 preventer, the transmission rod in the current manual locking device is fixed to the locking rod by a pin, such as in an existing blowout preventer locking device (application publication number: CN116607912A). This presents a problem of inconvenience in disassembling and assembling the transmission rod and the locking rod, thus causing inconvenience for subsequent factory repairs. To address the above problems, this embodiment proposes the following implementation scheme.

[0045] This utility model provides a detachable transmission device for the manual locking lever of a blowout preventer. The detachable transmission device includes a handwheel 1, a transmission rod 2, a first adapter 3, and a second adapter 4 connected in sequence. The first adapter 3 and the second adapter 4 are detachably connected, and the second adapter 4 is coaxially fixed to the locking lever of the blowout preventer.

[0046] The first adapter 3 is cylindrical, and the second adapter 4 is sleeve-shaped.

[0047] A limiting structure and a slide 42 are formed on the second adapter 4 near the sleeve end 43 for coaxial connection with the first adapter 3. One end of the slide 42 has an inlet / outlet 421 through which the limiting member 31 can enter and exit the slide 42. The other end of the slide 42 extends along a preset trajectory and connects to the limiting structure. One end of the limiting structure extends towards the sleeve end 43 and forms a stop surface. The first adapter 3 is provided with a limiting member 31, which is configured to rotate relative to the first adapter 3. During the process of the second adapter 4 being screwed in or out, the limiting member 31 can slide along the extension direction of the slide 42 and can switch between the limiting structure and the slide 42; when the limiting member 31 is embedded in the limiting structure, the first adapter 3 and the second adapter 4 are connected and the two can transmit force and torque through the limiting member 31 and the limiting structure; when the limiting member 31 moves out of the limiting structure and enters the slide 42, the limiting member 31 can be moved out from the inlet / outlet 421 so that the first adapter 3 and the second adapter 4 can be separated.

[0048] In one embodiment, the second adapter 4 is provided with an elastic retaining member 5. When the first adapter 3 is connected to the second adapter 4, the elastic retaining member 5 applies an elastic force to the first adapter 3. Under the action of the elastic force, the first adapter 3 can keep the limiting member 31 in a locked position against the stop surface. The elastic retaining member 5 can stop the limiting member 31 against the stop surface, preventing the first adapter 3 from disengaging from the limiting structure.

[0049] In one embodiment, a mounting cavity is formed in the second adapter 4, and the elastic retainer 5 is disposed in the mounting cavity; one end of the first adapter 3 extends into the mounting cavity and acts on the elastic retainer 5.

[0050] Preferably, the elastic retaining member 5 is a constant force compression spring. One end of the constant force compression spring is fixed to the inner wall of the mounting cavity, and the other end extends along the axial direction of the second adapter 4 and is fixedly installed with a pressure cover 6. The first adapter 3 presses on the pressure cover 6, and the pressure cover 6 presses the constant force compression spring. The pressure cover 3 increases the contact area with the first adapter 3, making the pressing more stable.

[0051] The second adapter 4, the mounting cavity, and the constant force compression spring are coaxially arranged to improve installation stability.

[0052] In one embodiment, a rounded corner is formed on the side of the mounting cavity near the socket end 43. A rounded corner is also formed on the end of the first adapter 3 that extends into the mounting cavity. This arrangement facilitates the insertion of the first adapter 3 into the mounting cavity of the second adapter 4, making the connection convenient.

[0053] The limiting structure is explained below.

[0054] In this embodiment, the limiting structure is a limiting groove 41 with an opening formed on the second adapter 4; the slide 42 is connected to the opening of the limiting groove 41, and the stop surface is formed on the inner wall of the limiting groove 41 away from the opening; the limiting member 31 is a limiting pin.

[0055] In one implementation, the stop surface is adapted to the outer wall shape of the limit pin.

[0056] In this embodiment, the limiting groove 41 has two opposing sidewalls spaced apart along the circumference of the second adapter 4; when the limiting member 31 is embedded in the limiting groove 41, the first adapter 3 and the second adapter 4 transmit circumferential torque through the limiting member 31 and the two opposing sidewalls.

[0057] In one implementation, a plurality of limiting pins are provided, and these limiting pins are evenly distributed at equal intervals along the circumference of the first limiting member 31 on the outer wall of the first adapter 3. A limiting groove 41 is provided corresponding to each limiting pin.

[0058] The following is a description of slide 42.

[0059] In this embodiment, one end of the slide 42 away from the limiting structure penetrates the end face of the sleeve end 43, thereby forming an inlet / outlet 421. Since the inlet / outlet 421 of the slide 42 is formed on the end face of the sleeve end 43 of the second adapter 4, when the first adapter 3 is inserted into the second adapter 4 for sleeve connection, the limiting member 31 on the first adapter 3 can enter the slide 42 through the inlet / outlet 421 on the end face of the sleeve end 43, which is convenient for operation.

[0060] In one implementation, the slide 42 includes a first slide section 4201 and a second slide section 4202. The inlet / outlet 421 is located at one end of the first slide section 4201, and the other end of the first slide section 4201 extends spirally away from the socket end 43. One end of the second slide section 4202 communicates with the first slide section 4201, and the other end extends spirally towards the socket end 43 and communicates with the limiting structure. The included angles between the first slide section 4201 and the second slide section 4202, and between the second slide section 4202 and the limiting groove 41, are all obtuse angles, allowing the limiting member 31 to move more smoothly during switching in and out.

[0061] The basic operating principle of the detachable transmission device for the manual locking lever of the blowout preventer in this embodiment of the invention is as follows:

[0062] Installation of transmission rod 2 and locking rod: Connect the first adapter 3 fixed to one end of transmission rod 2 with the second adapter 4 fixed to locking rod, so that the limiting member 31 enters the slide 42 from the inlet 421 of slide 42; rotate and press the first adapter 3 and screw it into the second adapter 4. During this process, the limiting member 31 can slide along the extension direction of slide 42. At the same time, the first adapter 3 abuts against the elastic retaining member 5 and causes the elastic retaining member 5 to deform elastically; when the limiting member 31 enters the limiting groove 41, the elastic retaining member 5 resets under its own elastic force and abuts the limiting member 31 against the stop surface of the limiting groove 41.

[0063] This achieves the installation connection between the first adapter 3 and the second adapter 4. Turning the handwheel 1 causes the transmission rod 2 to rotate, and transmits the torque sequentially to the first adapter 3, the second adapter 4, and the locking rod, thereby causing the locking rod to rotate around the axis.

[0064] Disassembly of transmission rod 2 and locking rod: Press handwheel 1, and transmission rod 2 axially presses the first adapter 3, causing the first adapter 3 to axially retract relative to the second adapter 4. The limiting member 31 moves out of the limiting groove 41 and enters the slide 42. Under the elastic force of the elastic retaining member 5, the first adapter 3 rotates out from the second adapter 4. During this process, the limiting member 31 can slide along the slide 42 and disengage from the inlet 421, thereby separating the first adapter 3 from the second adapter 4. In this way, transmission rod 2 can be removed from locking rod.

[0065] Therefore, the first adapter and the second adapter can be quickly disassembled and assembled, enabling the transmission rod 2 and the locking rod to be quickly disassembled and assembled.

[0066] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A detachable transmission device for a manual locking lever of a blowout preventer, characterized in that, It includes a handwheel, a transmission rod, a first adapter, and a second adapter connected in sequence; the second adapter is coaxially fixed to the locking rod of the blowout preventer. A limiting structure and a slide are formed on the second adapter near the sleeve end for coaxial connection with the first adapter; one end of the slide has an inlet and an outlet, and the other end extends along a preset trajectory and connects to the limiting structure; one end of the limiting structure extends toward the sleeve end and forms a stop surface. The first adapter is provided with a limiting member. The limiting member is configured to slide along the extension direction of the slide rail and switchably enter and exit between the limiting structure and the slide rail during the rotation of the first adapter relative to the second adapter. When the limiting member is embedded in the limiting structure, the first adapter and the second adapter are connected and can transmit force and torque through the limiting member and the limiting structure. When the limiting member moves out of the limiting structure and enters the slide rail, the limiting member can be moved out through the inlet and outlet to separate the first adapter and the second adapter.

2. The detachable transmission device for the manual locking lever of the blowout preventer according to claim 1, characterized in that, The second adapter is provided with an elastic retaining element; When the first adapter is connected to the second adapter, the elastic retainer applies an elastic force to the first adapter, and the first adapter, under the action of the elastic force, can keep the limiting member in a locked position against the stop surface.

3. The disconnectable transmission for a manual lock rod of a blowout preventer of claim 2, wherein, The elastic retainer is a constant force compression spring.

4. The disconnectable transmission for a manual lock rod of a blowout preventer of claim 2, wherein, The second adapter has a mounting cavity, and the elastic retainer is disposed within the mounting cavity; One end of the first adapter extends into the mounting cavity and acts on the elastic retainer.

5. The disconnectable transmission for a manual lock rod of a blowout preventer of claim 4, wherein, The mounting cavity has a rounded corner on the side near the socket end; and / or, The end of the first adapter that extends into the mounting cavity has a rounded corner.

6. The disconnectable transmission for a manual lock rod of a blowout preventer according to any one of claims 1-5, wherein, The limiting structure has two opposing sidewalls spaced apart circumferentially along the second adapter; When the limiting member is embedded in the limiting structure, the first adapter and the second adapter transmit circumferential torque to the two opposite side walls through the limiting member.

7. The disconnectable transmission for a manual lock rod of a blowout preventer according to any one of claims 1-5, wherein, The limiting structure is a limiting groove with an opening formed on the second adapter; The slide rail connects to the opening of the limiting groove, and the stop surface is formed on the inner wall of the limiting groove away from the opening; the limiting member is a limiting pin.

8. The detachable transmission device for the manual locking lever of the blowout preventer according to claim 7, characterized in that, The stop surface is adapted to the shape of the outer wall of the limiting pin.

9. The disconnectable transmission for a blind ram hand latch of any one of claims 1-5, wherein, The end of the slide away from the limiting structure passes through the end face of the sleeve end, thereby forming the entrance / exit.

10. The disconnectable transmission for a blind ram hand latch of any one of claims 1-5, wherein, The slide includes: The first slide section has the inlet / outlet located at one end of the first slide section, and the other end extending spirally away from the sleeve end; The second slide section has one end connected to the first slide section, and the other end extends spirally toward the sleeve end and connects to the limiting structure.

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