A new type of plunger drilling choke valve

Abstract

The utility model discloses a novel plunger type well drilling throttle valve, including throttle valve body and throttle valve control part, the throttle valve body has the liquid inlet buffer cavity and respectively with the installation hole, the liquid outlet hole, the connecting hole who communicates with the liquid inlet buffer cavity, the installation hole is equipped with the positioning piece, alloy erosion -resistant bushing, valve seat in proper order, the throttle valve control part includes drive arrangement, transmission main shaft, positioning short section, end sleeve, valve body gland, valve core, valve cage, valve rod connecting piece, valve core connecting bolt, valve rod, this novel plunger type throttle valve uses high temperature corrosion -resistant alloy at the fluid impact site and is designed as can be individually detached replacement structure, and the on -the -spot maintenance of equipment is convenient, and the whole structure is stable in operation, and the life is longer, and there is no larger vibration and noise in operation, and the starting torque is low, and the personnel operation is simple, and the special treatment of material can greatly increase the equipment use stability and security under the mud impact environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel plunger type well drilling throttle valve belongs to the throttle valve technical field in well control equipment field. BACKGROUND

[0002] Controlled pressure drilling technology is increasingly valued at home and abroad, and has become one of the hot drilling technologies. With the continuous promotion of controlled pressure drilling technology, the performance requirements of the controlled pressure drilling throttle valve are becoming higher and higher.

[0003] During the controlled pressure drilling process, the throttle valve always controls the drilling fluid returned from the wellhead, controls the casing pressure within the design range, and the throttle valve is continuously operated under pressure. Compared with conventional well control operation, it has a longer working time and higher requirements for the working stability and service life of the throttle valve. The maintainability on site and the precision of pressure control have high requirements.

[0004] The common throttle valve on the market has some defects in actual work. The ordinary needle type throttle valve is prone to high frequency vibration during use, which causes the needle to fall off and break. Although the orifice type throttle valve has small vibration during use, the throttle aperture is too small, the throttling efficiency is not high, and the operation torque is large, which makes it difficult for the on-site workers to use. The conventional throttle valve has the same principle, but the valve core outer protection device is an integral structure. Although the pressure resistance is guaranteed, leakage and blockage often occur during on-site use, which cannot be repaired and maintained on site, greatly affecting the operation stability of the entire equipment. The common throttle valve vibrates during use and cannot be completely avoided. The existence of vibration will aggravate the failure of the throttle valve and increase the overall difficulty and instability. Utility model content

[0005] The utility model aims at the problems existing in the prior art, and provides a novel plunger type well drilling throttle valve.

[0006] The technical scheme provided by the utility model to solve the above technical problems is: a novel plunger type well drilling throttle valve, which comprises a throttle valve body and a throttle valve control component.

[0007] The throttle valve body has a liquid inlet buffer cavity and mounting holes, liquid outlet holes and connecting holes communicated with the liquid inlet buffer cavity, and the mounting holes are sequentially provided with positioning pieces, alloy erosion-resistant sleeve pipes and valve seats.

[0008] The throttle valve control component comprises a driving device, a transmission main shaft, a positioning short section, an end sleeve, a valve body gland, a valve core, a valve cage, a valve rod connecting piece, a valve core connecting bolt and a valve rod.

[0009] The valve stem connecting piece is connected with a valve core through a valve core connecting bolt, the valve core is installed in the valve cage, the valve cage, the end sleeve and the positioning nipple are sequentially connected and installed in the connecting hole of the throttle valve body, the valve stem connecting piece, the valve stem and the transmission main shaft are sequentially connected, the valve body gland is installed at one end of the throttle valve body, the positioning nipple passes through the valve body gland and is connected with the driving device, one end of the transmission main shaft is located in the positioning nipple, and the other end passes through the positioning nipple and is threadedly connected with the driving device.

[0010] Further technical solutions are that a new type of sealing packing structure is arranged between the valve stem and the valve cage to seal the valve stem.

[0011] Further technical solutions are that the new type of sealing packing structure comprises a sealing ring, a blocking ring and a sealing gland which are sequentially arranged on the valve stem, and the sealing gland is located between the valve cage and the end sleeve.

[0012] Further technical solutions are that the throttle valve body is provided with a pressure measuring interface which is in communication with a liquid inlet buffer cavity.

[0013] Further technical solutions are that the valve seat is a tungsten carbide valve seat.

[0014] Further technical solutions are that the driving device comprises a hydraulic motor, a shaft coupling, a connecting outer cylinder and a worm gear reducer, the worm gear reducer is connected with the positioning nipple, the transmission main shaft is threadedly connected with the worm gear reducer, the hydraulic motor, the connecting outer cylinder and the worm gear reducer are sequentially connected, and the hydraulic motor is connected with an input shaft of the worm gear reducer through the shaft coupling.

[0015] Further technical solutions are that an axle shoulder is arranged on the transmission main shaft as a limiting structure of valve stem opening and closing stroke.

[0016] Further technical solutions are that a valve position monitoring device is arranged on the transmission main shaft.

[0017] Further technical solutions are that the valve position monitoring device comprises a high-precision valve position sensor, a packaging shell and an explosion-proof connector, the packaging shell is connected with the worm gear reducer through flange surface cooperation and bolt connection, the explosion-proof connector is installed in the packaging shell, and the high-precision valve position sensor is installed on the transmission main shaft and electrically connected with the explosion-proof connector.

[0018] Further technical solutions are that a manual operation device is arranged on the input shaft of the worm gear reducer, so that manual operation can be realized.

[0019] The utility model has the following beneficial effects:

[0020] 1. The valve core is a new type of plunger structure, and the pressure balance type structure can make the throttling valve control more smooth and stable;

[0021] 2. The throttling valve is powered controlled to realize remote precise control, and a manual operating mechanism is arranged to realize manual operation of on-site staff in local and emergency states;

[0022] 3. The reducer of the design is a worm gear structure, which runs stably, has a long service life, and has no large vibration and noise during operation;

[0023] 4. The valve core and valve seat adopt an easy-to-disassemble structure to realize on-site maintenance and repair, and a two-end symmetric double-face replacement structure is used for interchangeable use, so that in the case of damage to one end, the other end can also realize the working state after replacement, and the use of tungsten carbide material greatly enhances the service life in harsh working conditions;

[0024] 5. The valve body and control components are installed by using a valve body gland structure, which can be quickly disassembled by using special tools, greatly reducing the difficult time of knocking the flange bolt, and facilitating on-site maintenance;

[0025] 6. The throttling valve control components and the inside thereof are made of high-temperature corrosion-resistant alloy and are surface treated, which greatly increases the stability and safety of the equipment in the mud impact environment and improves the service life of the equipment;

[0026] 7. The valve cage is made of high-temperature hard alloy material, which greatly ensures the stability of the equipment in use, and is arranged as a separate structure, so that the parts can be replaced on site when the service life is reached or abnormal erosion occurs, which is simple to operate and does not affect the use of the overall equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the embodiment;

[0028] Figure 2 is a partial enlarged view in Figure 1

[0029] Figure 3 is a schematic diagram of the overall appearance of the embodiment;

[0030] Figure 4 is a three-dimensional structure schematic diagram of the valve body.

[0031] ​The figure shows: 1-Throttle valve body; 2-Inlet buffer chamber; 3-Outlet hole; 4-Positioning component; 5-Alloy corrosion-resistant sleeve; 6-Valve seat; 7-Drive spindle; 8-Positioning short section; 9-End sleeve; 10-Valve body cover; 11-Valve core; 12-Valve cage; 13-Valve stem connector; 14-Valve core connecting bolt; 15-Valve stem; 16-Pressure measuring interface; 17-Worm gear reducer; 18-Connecting outer cylinder; 19-Hydraulic motor; 20-Manual operating device; 21-High-precision valve position sensor; 22-Encapsulation shell; 23-Explosion-proof connector. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figures 1-4 As shown, the present invention provides a novel plunger-type drilling throttle valve, comprising a throttle valve body 1 and a throttle valve control component;

[0037] The inner cavity of the throttle valve body is designed in a cylindrical structure; the throttle valve body 1 has a liquid inlet buffer cavity 2 and mounting holes, liquid outlet holes 3 and connecting holes respectively communicating with the liquid inlet buffer cavity 2, wherein the connecting holes and the mounting holes are respectively arranged on the two sides of the liquid inlet buffer cavity 2, and the liquid outlet holes 3 are located below the liquid inlet buffer cavity 2;

[0038] The mounting holes are sequentially provided with positioning members 4, alloy erosion-resistant sleeve pipes 5 and valve seats 6; wherein the alloy erosion-resistant sleeve pipes 5 are locked by the tight positioning members 4, and the valve seats 6 are provided with sealing grooves for assembly and fluid sealing;

[0039] The valve seats 6 can be installed and removed through the front end of the valve body, are made of tungsten carbide material, can be suitable for harsh drilling environments, and are provided with the same structure at both ends, so that the other end can be used after one end is eroded and worn, greatly prolonging the overall service life of the equipment;

[0040] The throttle valve control component includes a driving device, a transmission main shaft 7, a positioning short section 8, an end sleeve 9, a valve body gland 10, a valve core 11, a valve cage 12, a valve rod connecting member 13, a valve core connecting bolt 14 and a valve rod 15;

[0041] The valve rod connecting member 13 is connected with the valve core 11 through the valve core connecting bolt 14, the valve core 11 is installed in the valve cage 12, the valve cage 12, the end sleeve 9 and the positioning short section 8 are sequentially connected and installed in the connecting hole of the throttle valve body 1 from left to right, the valve rod connecting member 13, the valve rod 15 and the transmission main shaft 7 are sequentially connected, the valve body gland 10 is installed at the right end of the throttle valve body 1, the positioning short section 8 penetrates through the valve body gland 10 and is connected with the driving device, the left end of the transmission main shaft 7 is located in the positioning short section 8, and the other end penetrates through the positioning short section 8 and is threadedly connected with the driving device.

[0042] The end sleeve 9 is threadedly connected with the positioning short section 8; the transmission main shaft 7 is provided with a shaft shoulder as a limiting structure of valve rod opening and closing stroke.

[0043] The valve body gland 10 is installed between the positioning short section 8 and the end sleeve 9, wherein the valve body gland 10 is lockingly connected with the 5 threaded end of the left end of the throttle valve body 1, the size of the interface between the valve body gland 10 and the throttle valve body 1 is adapted, and the stability of installation can be better ensured;

[0044] The valve core 11 is made of tungsten carbide material, ensuring the strength requirement in the drilling environment, is designed in a plunger type two-end symmetrical structure, can be used interchangeably at both ends, and is provided with a balance hole to make the control more smooth and stable;

[0045] The valve rod connecting member 13 and the valve rod 15 are connected through a threaded structure;

[0046] Valve cage 12 and end sleeve 9 are connected by bolts, and the inner and outer parts of valve cage 12 are provided with sealing grooves for fluid sealing. The valve cage is designed according to the interchangeability principle and is produced by high-temperature hard alloy, which ensures the use requirements in high-temperature and high-corrosion environment, and can be repaired by replacing the valve cage if damaged;

[0047] In this embodiment, a new type of sealing packing structure is arranged between the valve stem 15 and the valve cage 12 to seal the valve stem, wherein the new type of sealing packing structure comprises a sealing ring, a check ring and a sealing gland which are sequentially arranged on the valve stem; the sealing gland is located between the valve cage 15 and the end sleeve 9.

[0048] The sealing ring and the check ring are made of special materials. The sealing ring and the check ring are installed in the sealing cavity of the valve cage 15 through the sealing gland, which can better seal and protect.

[0049] In this embodiment, the throttling valve body 1 is provided with a pressure measuring interface 16 which communicates with the liquid inlet buffer cavity.

[0050] As shown in Figure 1 and 2 In this embodiment, the driving device comprises a hydraulic motor 19, a shaft coupling, a connecting outer cylinder 18 and a worm gear reducer 17. The worm gear reducer 17 is connected to the positioning short section through a flange surface by bolts. The transmission main shaft 7 is threadedly connected to the worm gear reducer 17. The hydraulic motor 19, the connecting outer cylinder and the worm gear reducer 17 are connected in sequence. The hydraulic motor 19 is connected to the input shaft of the worm gear reducer 17 through the shaft coupling.

[0051] The shaft coupling is located in the connecting outer cylinder 18. The connecting outer cylinder 18 protects the shaft coupling. A connecting sleeve is installed between them to transmit torque and seal and protect the use environment of the shaft coupling and the reducer.

[0052] The hydraulic motor 19 has multiple forms as a prime mover. The power supply form is not limited to the structure of the hydraulic motor, but can also be controlled by pneumatic, electric (including servo, stepping, asynchronous) and other forms.

[0053] In this embodiment, the input shaft of the worm gear reducer 17 is provided with a manual operating device 20. The manual operating device 20 is fastened to the input shaft by positioning screws, and manual operation can be realized.

[0054] As shown in Figure 1As shown in the embodiment, the valve position monitoring device is arranged on the transmission main shaft, and comprises a high-precision valve position sensor 21, a packaging shell 22 and an explosion-proof connector 23.

[0055] The high-precision valve position sensor is a high-precision position sensor, has high repositioning accuracy, and is provided with a dead zone to ensure the stability of the position of the throttle valve during opening and closing.

[0056] The above description does not limit the utility model in any form, although the utility model has been disclosed by the above embodiment, however, is not used to limit the utility model, any person skilled in the art, without departing from the technical scheme range of the utility model, can utilize the technical content disclosed above to make some changes or modifications for equivalent examples of equivalent changes, but any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the utility model, all still belong to the range of the technical scheme of the utility model.

Claims

1. A new type of plunger drilling choke valve, characterized in that, The throttle valve body and the throttle valve control component are included. The throttle valve body has a liquid inlet buffer cavity and mounting holes, liquid outlet holes and connecting holes which are communicated with the liquid inlet buffer cavity respectively. The throttle valve control component includes a driving device, a transmission main shaft, a positioning short section, an end sleeve, a valve body gland, a valve core, a valve cage, a valve rod connecting piece, a valve core connecting bolt and a valve rod. The valve rod connecting piece is connected with the valve core through the valve core connecting bolt.

2. A new type of plunger drilling choke valve according to claim 1, characterized in that, The valve core is installed in the valve cage.

3. A new type of plunger drilling choke valve according to claim 2, characterized in that, The valve cage, the end sleeve and the positioning short section are connected in sequence and installed in the connecting hole of the throttle valve body.

4. A new type of plunger drilling choke valve according to claim 1, characterized in that, The valve rod connecting piece, the valve rod and the transmission main shaft are connected in sequence.

5. A new type of plunger drilling choke valve according to claim 1, characterized in that, The valve body gland is installed at one end of the throttle valve body.

6. A new type of plunger drilling choke valve according to claim 1, characterized in that, The positioning short section passes through the valve body gland and is connected with the driving device.

7. A new type of plunger drilling choke valve according to claim 6, characterized in that, The transmission main shaft is located in the positioning short section at one end and is threadedly connected with the driving device at the other end.

8. A new type of plunger drilling choke valve according to claim 6, characterized in that, A novel sealing packing structure is arranged between the valve rod and the valve cage.

9. A new type of plunger drilling choke valve according to claim 8, characterized in that, The novel sealing packing structure includes a sealing ring, a retaining ring and a sealing gland which are sequentially sleeved on the valve rod.

10. A new type of plunger drilling choke valve according to claim 6, characterized in that, The sealing gland is located between the valve cage and the end sleeve. A pressure measuring interface is arranged on the throttle valve body and communicated with the liquid inlet buffer cavity. The valve seat is made of tungsten carbide. The driving device includes a hydraulic motor, a coupling, a connecting outer cylinder and a worm gear reducer. The worm gear reducer is connected with the positioning short section. The transmission main shaft is threadedly connected with the worm gear reducer. The hydraulic motor, the connecting outer cylinder and the worm gear reducer are connected in sequence. An axle shoulder is arranged on the transmission main shaft as a limiting structure of the valve rod opening and closing stroke. A valve position monitoring device is arranged on the transmission main shaft. The valve position monitoring device includes a high-precision valve position sensor, a packaging shell and an explosion-proof connector. The packaging shell is connected with the worm gear reducer through flange surface cooperation bolts. The explosion-proof connector is installed in the packaging shell. The high-precision valve position sensor is installed on the transmission main shaft and is electrically connected with the explosion-proof connector. A manual operating device is arranged on the input shaft of the worm gear reducer to realize manual operation.

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