An electric blowout preventer with well pressure balancing structure

Abstract

The utility model provides a kind of electric blowout preventer with well pressure balance structure, comprising: shell, multiple gate valve assembly, multiple speed reducer, multiple well pressure channel, multiple explosion-proof motor, upper joint and lower joint;Multiple gate valve assembly is respectively installed in the both sides inside the shell;Multiple well pressure channel is respectively arranged in the inside of shell;Multiple speed reducer is respectively installed in the both sides of shell;Multiple explosion-proof motor is respectively installed in one end of multiple speed reducer;Upper joint is installed in the central position of the top of shell;Lower joint is installed in the central position of the bottom of shell.The utility model provides a kind of electric blowout preventer with well pressure balance structure, using motor plus planetary gear reducer driving mode, without complex hydraulic system, only single power line can be realized control, simple structure, convenient operation and no hydraulic oil leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of cable blowout preventers, and in particular to an electric blowout preventer with a well pressure balancing structure. Background Technology

[0002] In cable logging and perforation operations, blowout preventers need to be installed at the top of the wellhead tree to seal the wellhead in case of abnormalities in cable or wireline operations, thus preventing blowout accidents. Conventional blowout preventers are mostly manually or hydraulically driven structures. The opening and closing of the gate requires remote control via hydraulic control lines and hydraulic control systems, and well sealing operations can be completed in scenarios where there are no cables in the well. However, these types of blowout preventers have obvious drawbacks: manual ones require personnel to climb to the wellhead to operate, which is unsafe and inefficient; hydraulic ones require hydraulic cylinders and hydraulic lines, which are not only complex in structure and operation, but also pose safety and environmental risks of high-pressure hydraulic oil leakage. Meanwhile, traditional electric blowout preventers require extremely high motor torque to overcome the thrust generated by high well pressure, resulting in large structural dimensions of the motor and reducer and high equipment costs. This makes it difficult to meet the lightweight and low-cost operation requirements under high-pressure conditions. The lack of a well pressure balancing structure will cause excessive motor torque requirements, further increasing the size and cost of the equipment.

[0003] Therefore, it is necessary to provide an electric blowout preventer with a well pressure balancing structure to solve the above-mentioned technical problems. Utility Model Content

[0004] This utility model provides an electric blowout preventer with a well pressure balancing structure, which solves the problems of complex driving methods, safety and environmental hazards, high motor torque requirements and high equipment costs of conventional electric blowout preventers, and excessive motor torque requirements due to the lack of a well pressure balancing structure.

[0005] To solve the above-mentioned technical problems, this utility model provides an electric blowout preventer with a well pressure balancing structure, comprising: Housing, multiple gate assemblies, multiple reducers, multiple well pressure channels, multiple explosion-proof motors, upper connector and lower connector; Multiple gate assemblies are respectively installed on both sides inside the housing; Multiple well pressure channels are respectively disposed inside the shell; The multiple speed reducers are respectively installed on both sides of the housing; The explosion-proof motors are respectively installed at one end of the multiple reducers; The upper connector is installed at the center of the top of the housing; The lower connector is installed at the center of the bottom of the housing.

[0006] Preferably, a bearing is provided between the reducer and the explosion-proof motor.

[0007] Preferably, an end cap is provided between the housing and the reducer, and multiple insert plates are provided on the surface of the housing.

[0008] Preferably, a sealing ring is provided on the outer side of the well pressure channel.

[0009] Preferably, a connecting union is installed on the lower connector.

[0010] Preferably, the surface of the housing is provided with a disassembly plate.

[0011] Preferably, a limiting assembly is provided between the housing and the disassembly plate. The limiting assembly includes a limiting plate, a sealing gasket, two U-shaped fixing blocks, two external threaded blocks, and two threaded sleeves. The limiting plate is disposed between the housing and the disassembly plate. The sealing gasket is adhered to one side of the limiting plate. The two U-shaped fixing blocks are respectively connected to the top and bottom of the limiting plate. The two external threaded blocks are respectively connected to the top and bottom of the housing. The two threaded sleeves are respectively threaded to the surfaces of the two external threaded blocks.

[0012] Compared with related technologies, the electric blowout preventer with well pressure balancing structure provided by this utility model has the following advantages: This utility model provides an electric blowout preventer with a well pressure balancing structure. It adopts a drive method of motor and planetary gear reducer, which eliminates the need for a complex hydraulic system and can be controlled with only a single power line. It has a simple structure, is easy to operate and has no risk of hydraulic oil leakage. At the same time, it uses the well pressure channel to balance the pressure at both ends of the lead screw, which greatly reduces the motor torque requirement. It can be adapted to small power motors, reducing the size and cost of the equipment. It can also accurately control the gate stroke and drive torque, which facilitates remote intelligent control and improves the safety and intelligence of the operation. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of a first embodiment of an electric blowout preventer with a well pressure balancing structure provided by this utility model; Figure 2 for Figure 1 The side view of the electric blowout preventer shown; Figure 3 for Figure 1 The diagram shows a cross-sectional view of the electric blowout preventer. Figure 4 A schematic diagram of the second embodiment of an electric blowout preventer with a well pressure balancing structure provided by this utility model; Figure 5 for Figure 4 The enlarged schematic diagram of part A is shown.

[0014] The diagram labels are as follows: 1. Shell, 2. Well pressure channel, 3. Reducer, 4. Sealing ring, 5. Explosion-proof motor, 6. Upper connector, 7. Insert plate, 8. Lower connector, 9. Union. 10. Disassemble the panel. 11. Limiting assembly; 111. Limiting plate; 112. Sealing gasket; 113. U-shaped fixing block; 114. External threaded block; 115. Threaded sleeve. 12. Gate assembly; 13. End cover; 14. Bearing. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example 1

[0017] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic diagram of the first embodiment of an electric blowout preventer with a well pressure balancing structure provided by this utility model; Figure 2 for Figure 1 The side view of the electric blowout preventer shown; Figure 3 for Figure 1 The diagram shows a cross-sectional view of an electrically powered blowout preventer (BOP). An electrically powered BOP with a well pressure balancing structure includes: Housing 1, multiple gate assemblies 12, multiple reducers 3, multiple well pressure channels 2, multiple explosion-proof motors 5, upper connector 6 and lower connector 8; The plurality of the gate assemblies 12 are respectively installed on both sides inside the housing 1; Multiple well pressure channels 2 are respectively disposed inside the housing 1; Multiple reducers 3 are respectively installed on both sides of the housing 1; The plurality of explosion-proof motors 5 are respectively installed at one end of the plurality of reducers 3; The upper connector 6 is installed at the center of the top of the housing 1; The lower connector 8 is installed at the center of the bottom of the housing 1.

[0018] A bearing 14 is provided between the reducer 3 and the explosion-proof motor 5.

[0019] An end cap 13 is provided between the housing 1 and the reducer 3, and a plurality of insert plates 7 are provided on the surface of the housing 1.

[0020] A sealing ring 4 is provided on the outside of the well pressure channel.

[0021] A connecting union 9 is installed on the lower connector 8.

[0022] A bearing 14 is provided between the reducer 3 and the explosion-proof motor 5. The motor and reducer are fixed to the side of the housing by bolts. Only one power line is needed to drive it. The sealing ring 4 can prevent well pressure leakage and ensure pressure balance. The reducer 3 is a planetary gear reducer, which can amplify torque and is equipped with a manual operating handle for manually opening and closing the gate when the motor fails or the power is cut off. The gate assembly 12 is connected to the drive screw with a trapezoidal thread, which can achieve self-locking. The gate will not move on its own after the motor stops. The well pressure channel 2 passes through the inner hole of the drive screw, which can transmit the well pressure to the rear end of the screw and seal it to achieve pressure balance at both ends of the screw.

[0023] The working principle of the electric blowout preventer with well pressure balancing structure provided by this utility model is as follows: During operation, the device is installed at the wellhead via the connection of the upper connector 6 and the lower connector 8 by the connector 9. The explosion-proof motor 5 is powered on, and the motor output power is transmitted to the planetary gear reducer 3 via the bearing 14. The reducer amplifies the torque and drives the lead screw to rotate. The lead screw drives the gate assembly 12 to make linear motion through the trapezoidal thread, realizing the opening and closing of the gate. When it is necessary to balance the well pressure, the high pressure in the well can be connected to the rear end of the lead screw through the well pressure channel 2 to keep the pressure at both ends of the lead screw balanced. At this time, the motor only needs to overcome the friction of the gate to complete the opening and closing action. If the motor fails or the power is cut off, the manual handle on the reducer can be operated to manually drive the lead screw to complete the emergency opening and closing of the gate.

[0024] Compared with related technologies, the electric blowout preventer with well pressure balancing structure provided by this utility model has the following advantages: This utility model provides an electric blowout preventer with a well pressure balancing structure. It adopts a drive method of motor and planetary gear reducer, which eliminates the need for a complex hydraulic system and can be controlled with only a single power line. It has a simple structure, is easy to operate and has no risk of hydraulic oil leakage. At the same time, it uses the well pressure channel to balance the pressure at both ends of the lead screw, which greatly reduces the motor torque requirement. It can be adapted to small power motors, reducing the size and cost of the equipment. It can also accurately control the gate stroke and drive torque, which facilitates remote intelligent control and improves the safety and intelligence of the operation.

[0025] Example 2

[0026] Please refer to the following: Figure 4 and Figure 5 Based on the first embodiment of this application which provides an electric blowout preventer with a well pressure balancing structure, the second embodiment of this application proposes another electric blowout preventer with a well pressure balancing structure. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0027] Specifically, the second embodiment of this application provides an electric blowout preventer with a well pressure balancing structure, which differs in that it also includes a disassembly plate 10, which is disposed on the surface of the housing 1.

[0028] A limiting assembly 11 is provided between the housing 1 and the disassembly plate 10. The limiting assembly 11 includes a limiting plate 111, a sealing gasket 112, two U-shaped fixing blocks 113, two external threaded blocks 114, and two threaded sleeves 115. The limiting plate 111 is disposed between the housing 1 and the disassembly plate 10. The sealing gasket 112 is adhered to one side of the limiting plate 111. The two U-shaped fixing blocks 113 are respectively connected to the top and bottom of the limiting plate 111. The two external threaded blocks 114 are respectively connected to the top and bottom of the housing 1. The two threaded sleeves 115 are respectively threaded to the surfaces of the two external threaded blocks 114.

[0029] The sealing gasket 112 ensures the sealing of the connection between the disassembly plate and the housing, preventing well pressure leakage. The U-shaped fixing block can be pressed and fixed by tightening the threaded sleeve 115, thus achieving a stable limit on the disassembly plate.

[0030] The working principle of the electric blowout preventer with well pressure balancing structure provided by this utility model is as follows: When it is necessary to repair the gate assembly 12 and the components of the well pressure channel 2 inside the housing 1, first loosen the threaded sleeve 115 of the limiting component 11 to release the limit on the U-shaped fixing block 113, then remove the limiting plate 111 and the sealing gasket 112, and the disassembly plate 10 can be disassembled to carry out the repair work; after the repair is completed, the disassembly plate is reset, the limiting plate and the sealing gasket are installed in sequence, and the U-shaped fixing block is locked by the threaded sleeve to complete the sealing and fixing of the disassembly plate without affecting the overall pressure bearing and blowout prevention performance of the device.

[0031] Compared with related technologies, the electric blowout preventer with well pressure balancing structure provided by this utility model has the following advantages: This utility model provides an electric blowout preventer with a well pressure balancing structure. By adding a disassembly plate 10 and a limiting component 11, convenient maintenance of the internal components of the housing 1 is realized. At the same time, the sealing gasket 112 and the limiting component 11 can ensure the sealing and structural stability of the device after maintenance. Without affecting the core functions of well pressure balancing and blowout prevention, the device's maintenance convenience and service life are improved.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An electric blowout preventer with a well pressure balancing structure, characterized in that, include: Housing, multiple gate assemblies, multiple reducers, multiple well pressure channels, multiple explosion-proof motors, upper connector and lower connector; Multiple gate assemblies are respectively installed on both sides inside the housing; Multiple well pressure channels are respectively disposed inside the housing; The multiple speed reducers are respectively installed on both sides of the housing; The explosion-proof motors are respectively installed at one end of the multiple reducers; The upper connector is installed at the center of the top of the housing; The lower connector is installed at the center of the bottom of the housing.

2. The electric blowout preventer with well pressure balancing structure according to claim 1, characterized in that, A bearing is provided between the reducer and the explosion-proof motor.

3. The electric blowout preventer with well pressure balancing structure according to claim 1, characterized in that, An end cap is provided between the housing and the reducer, and multiple insert plates are provided on the surface of the housing.

4. The electric blowout preventer with well pressure balancing structure according to claim 1, characterized in that, A sealing ring is provided on the outside of the well pressure channel.

5. The electric blowout preventer with well pressure balancing structure according to claim 1, characterized in that, A connecting union is installed on the lower connector.

6. The electric blowout preventer with well pressure balancing structure according to claim 1, characterized in that, The surface of the housing is provided with a disassembly plate.

7. The electric blowout preventer with well pressure balancing structure according to claim 6, characterized in that, A limiting assembly is provided between the housing and the disassembly plate. The limiting assembly includes a limiting plate, a sealing gasket, two U-shaped fixing blocks, two external threaded blocks, and two threaded sleeves. The limiting plate is disposed between the housing and the disassembly plate. The sealing gasket is adhered to one side of the limiting plate. The two U-shaped fixing blocks are respectively connected to the top and bottom of the limiting plate. The two external threaded blocks are respectively connected to the top and bottom of the housing. The two threaded sleeves are respectively threaded to the surfaces of the two external threaded blocks.

Images