CN215485956U

CN215485956U - Underground switch valve for electric control oil-gas well

Info

Publication number: CN215485956U
Application number: CN202121850595.1U
Authority: CN
Inventors: 徐丁琳
Original assignee: Sichuan Hengmingze Petroleum And Natural Gas Engineering Co ltd
Current assignee: Sichuan Hengmingze Petroleum And Natural Gas Engineering Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-11
Anticipated expiration: 2031-08-10

Abstract

The utility model provides an underground switch valve for an electric control oil-gas well, which relates to the technical field of underground operation of oil-gas drilling, in particular to an underground switch valve for the electric control oil-gas well, and comprises a valve body, wherein the valve body comprises an upper joint, a lower joint and a valve plate bin arranged in the valve body, a valve plate is arranged in the valve plate bin, a sealing surface capable of being attached to the valve plate is arranged in the valve body, pressure sensors and temperature sensors are arranged on the front surface and the back surface of the valve plate, a first electromagnet is arranged at the bottom of the valve plate bin, a second electromagnet is arranged on the valve plate, a third electromagnet is arranged on the sealing surface, and the first electromagnet, the second electromagnet and the third electromagnet are electrically connected with a control end on the ground surface.

Description

Underground switch valve for electric control oil-gas well

Technical Field

The utility model relates to the technical field of downhole operation of petroleum and natural gas drilling, in particular to an underground switch valve for an electric control oil-gas well.

Background

The construction industry of oil and gas wells is a high-risk industry, and due to the uncertainty of underground fluid, temperature and pressure, channels such as drill rods, sleeves, oil pipes and the like need to be subjected to on-off control or throttling control underground in the processes of oil and gas drilling, well logging, well cementation, well completion and testing so as to be convenient for carrying out the well construction engineering of the oil and gas wells more safely.

The underground switch valve in the prior art mostly adopts hydraulic system to control opening and closing of valve body, when using, because the pipe wall of hydraulic pressure pipeline is thinner, run into the in-process in the pit and meet the collision, the extrusion, then probably cause hydraulic pressure pipeline jam even damage, the mode of two the most hydraulic control pipeline control of current use, any pipeline wherein is impaired, can lead to the underground switch valve can only open or can only close, thereby make the underground switch valve out of control, in addition, hydraulic system structure is complicated, installation and use are all more difficult.

The surface control part needs to be used for a long time, and after the surface control part is locked permanently, because the hydraulic control pipeline is left in the underground, a gas or liquid channel can be formed, so that the underground gas or liquid reaches the surface along the hydraulic control pipeline, and a new potential safety hazard is brought.

In the prior art, the angle between the valve plate and the sealing cylinder which are opened without exception is 90 degrees, so that the stroke of the switch valve is long when the switch valve is opened and closed, and the performance requirement of a spring for resetting the valve plate is higher under the underground temperature condition, so that the underground switch valve is limited in the depth and the switching frequency, and the problem of reliability is also caused.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides an underground switch valve for an electrically controlled oil and gas well, and aims to solve the problem in the prior art that the underground switch valve is out of control due to the breakage or blockage of a hydraulic system.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

the utility model provides an automatically controlled oil gas well is with switching valve in pit, it includes the valve body, the valve body includes the top connection, the bottom connection and the valve plate storehouse of setting in the valve body, be provided with the valve plate in the valve plate storehouse, be provided with the sealed face that can laminate with the valve plate in the valve body, all be provided with pressure sensor and temperature sensor on the tow sides of valve plate, valve plate storehouse bottom is provided with first electromagnet, be provided with the second electromagnet on the valve plate, be provided with the third electromagnet on the sealed face, first electromagnet, second electromagnet and third electromagnet all with control end electric connection on the earth's surface.

Furthermore, a pivot structure is arranged at one end of the valve plate close to the upper connector, the valve plate is fixedly connected with the outer ring of the pivot structure, and the inner shaft of the pivot structure is fixedly connected with the valve body. The friction force of the valve plate during rotation can be reduced by using the bearing, so that the valve plate is smoother in the process of opening or closing the switch valve, and the service life of the valve plate is prolonged.

Furthermore, the included angle between the sealing surface and the valve plate bin is 43-46 degrees. The stroke of the switch valve during opening and closing is shortened by half, the opening and closing time of the switch valve is reduced, the switch valve is easier to open and close, meanwhile, when the switch valve is closed, the pressure of fluid introduced from the lower interface on the valve plate is 43-46 degrees to the valve plate, the positive pressure required to be borne by the valve plate is greatly reduced, the deformation of the valve plate during working is reduced, and the service life of the valve plate is prolonged.

Further, the first electromagnet, the second electromagnet, and the third electromagnet are all provided in plurality. The plurality of electromagnets can enhance the attraction force or the repulsion force between the valve plate and the sealing surface or the valve plate bin, and meanwhile, the electromagnets at different positions can be electrified to adapt to different working conditions.

Further, the second electromagnets are respectively in one-to-one correspondence with the first electromagnets and the third electromagnets. So that the valve plate can realize accurate positioning when opening or closing the valve.

Further, the valve plate is provided in an elliptical shape. The elliptic valve plate enables the valve plate to be attached to the sealing surface more tightly, and meanwhile, the electromagnets on the valve plate and the electromagnets on the sealing surface are in one-to-one correspondence more conveniently.

Furthermore, a cable hole is formed in the pipe wall of the valve body, and a sealing device is arranged at the outlet of the cable hole. The cable hole is used for the cable of components and parts such as power supply magnet and pressure sensor to pass through, and sealing device seals the cable hole, can prevent that gas or liquid in the valve body from leaking away through the cable hole, has improved the security of device.

The utility model has the beneficial effects that:

the electromagnet is used as a power device for opening or closing the valve plate, so that the switch valve is more convenient and flexible to open and close, the response is rapid, and the control is simple.

When a valve body channel needs to be closed, different currents are introduced into the second electromagnet and the third electromagnet through the ground control end, so that repulsive magnetic fields are generated, the valve plate bin can bounce the valve plate open, and then specific currents are introduced into the first electromagnet, so that the sealing surface and the valve plate are attracted to each other, and the valve plate is adsorbed on the sealing surface; when the valve body channel needs to be opened, the fluid pressure in the underground switch valve channel is adjusted to adjust the pressure on the two sides of the valve plate to be balanced through the temperature and pressure information on the two sides of the valve plate fed back by the temperature sensor and the pressure sensor, the valve plate only receives the electromagnetic force, and specific current is introduced to the first electromagnet, the second electromagnet and the third electromagnet to open the switch valve.

In addition, the temperature sensor and the pressure sensor can assist the valve plate to open the switch valve, can also play a role in transmitting working condition information in the switch valve at any time, and improves the controllability and the safety of the switch valve.

Meanwhile, compared with a hydraulic underground switch valve in the prior art, the electromagnet used by the underground switch valve for the electrically-controlled oil-gas well has the characteristics of small control end volume and high safety; the processing difficulty of the underground switch valve body part is reduced, the structure is simple, the electrification and data transmission of the cable cannot be influenced when the underground switch valve body part is collided in the process of running, and the safety is improved. The depth of the valve body and the opening and closing times are not limited by the performance of the spring any more, the service life of the switch valve is prolonged, the reliability is improved, and the cost is reduced.

In addition, the solid cable is used for transmitting data and power, the sealing treatment is simple due to the fact that the hydraulic environment is not available any more, the sealed cable can effectively prevent underground gas or liquid from reaching the ground along the cable, and safety of the device is greatly improved.

Drawings

Fig. 1 is a structural view of a downhole switching valve.

Fig. 2 is a partially enlarged view of the pivot structure.

Fig. 3 is a side view partially enlarged of the pivot structure.

Fig. 4 is a seal surface structure view.

Fig. 5 is a view showing the structure of the valve plate.

FIG. 6 is a view showing the bottom structure of the valve plate chamber

FIG. 7 is a partial enlarged view of the exit of a cable hole

Wherein, 1, an upper joint; 2. a lower joint; 3. a valve plate compartment; 4. a valve plate; 5. a sealing surface; 6. a pivot structure; 7. a cable hole; 8. a seal ring, 91, a first electromagnet; 92. a second electromagnet; 93. a third electromagnet.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model as defined and defined in the appended claims, and all matters produced by the utility model using the inventive concept are protected.

As shown in fig. 1, the downhole switch valve for the electric control oil-gas well comprises a valve body, wherein the valve body comprises an upper joint 1, a lower joint 2 and a valve plate bin 3 arranged in the valve body, a valve plate 4 is arranged in the valve plate bin 3, a sealing surface 5 capable of being attached to the valve plate 4 is arranged in the valve body, pressure sensors and temperature sensors are arranged on the front surface and the back surface of the valve plate 4, a third electromagnet 91 is arranged at the bottom of the valve plate bin 3, a second electromagnet 92 is arranged on the valve plate 4, a first electromagnet 93 is arranged on the sealing surface 5, and the first electromagnet 91, the second electromagnet 92 and the third electromagnet 93 are electrically connected with a control end on the ground surface.

In an actual operation example, when the downhole switch valve needs to open a channel, the temperature sensor and the pressure sensor on the valve plate 4 feed back pressure and temperature information of the front and back surfaces of the valve plate 4 to the ground control end, then fluid with specific pressure is introduced into the switch valve from the ground, so that the pressure of the front and back surfaces of the valve plate 4 is equal, and then the third electromagnet 93 on the sealing surface 5 and the second electromagnet 92 on the valve plate 4 are controlled by the ground control end to generate opposite magnetic fields, so that the sealing surface 5 pushes the valve plate 4 open. The valve plate 4 approaches the valve plate chamber 3 around the pivot structure 6, the first electromagnet 91 at the bottom of the valve plate chamber 3 is energized, the magnetic field generated by the first electromagnet 91 and the magnetic field of the valve plate 4 attract each other, the valve plate 4 returns to the inside of the valve plate chamber 3, at this time, the current conducted in the third electromagnet 93 of the sealing surface 5 is cut off, and the channel of the downhole switching valve is opened.

When the channel of the downhole switching valve needs to be closed, specific currents are introduced into the first electromagnet 91 at the bottom of the valve plate chamber 3 and the second electromagnet 92 of the valve plate 4, so that a mutually repulsive magnetic field is generated between the valve plate chamber 3 and the valve plate 4, the valve plate 4 is pushed to be close to the sealing surface 5 around the pivot structure 6, the magnetic field generated by the third electromagnet 93 in the sealing surface 5 attracts the valve plate 4 to be attached to the sealing surface 5, at the moment, the currents introduced into the first electromagnet 91 of the valve plate chamber 3 are cut off, and the channel of the downhole switching valve is in a closed state.

In the process of opening or closing the switch valve, in order to shorten the movement stroke of the valve plate, the sealing surface 5 and the valve plate bin 3 form an angle of 45 degrees, so that the stroke of the valve plate 4 from the valve plate bin 3 to the sealing surface 5 is shortened by half, the burden of an electromagnet is reduced, meanwhile, the positive pressure required to be borne by the valve plate is greatly reduced, the deformation of the valve plate during working is reduced, and the service life of the valve plate is prolonged.

As shown in fig. 2 or fig. 3, a pivot structure 6 is disposed at an end of the valve plate 4 close to the upper joint 1, the valve plate 4 is welded and fixed to an outer ring of the pivot structure 6, a pivot groove is formed in an inner wall of the valve body at an end of the valve plate chamber 3 close to the upper joint 1, the pivot structure 6 is disposed in the pivot groove, an inner shaft of the pivot structure 6 is welded and fixed to the valve body, and an outer ring of the pivot structure 6 does not contact with the valve body, so that the pivot structure 6 can reduce friction resistance when the valve plate 4 performs an opening or closing operation of the switching valve.

As shown in fig. 4 to 6, since the seal surface 5 is formed at an angle of 45 ° with respect to the valve plate magazine 3 and the seal surface is formed in a hollow elliptical shape, the valve plate 4 is formed in an elliptical shape so that the valve plate 4 and the seal surface 5 are more fitted to each other.

In order to enable the sealing surface 5 and the valve plate 4 to be tightly attached and enable the valve plate 4 to accurately return to the valve plate chamber 3, a plurality of first electromagnets 91, a plurality of second electromagnets 92 and a plurality of third electromagnets 93 are arranged at the bottom of the valve plate chamber 3 and are uniformly distributed on the valve plate 4 and the sealing surface 5 along the edge, and the second electromagnets 92 on the valve plate 4 are respectively in one-to-one correspondence with the third electromagnets 93 on the sealing surface 5 and the first electromagnets 91 at the bottom of the valve plate chamber 3.

As shown in figure 7, the cable hole 7 extending along the axial direction is processed in the pipe wall of the valve body, cables connected with components such as sensors and electromagnets can pass through the cable hole 7, the cables can be protected from being damaged by severe environments, the cables can be more regular, and the whole underground switch valve is convenient to place and take out. And a sealing ring 8 is arranged at the outlet of the cable hole 7, and the sealing ring 8 is used for sealing the outlet of the cable hole 7, so that the protection grade of the underground switch valve is improved.

Claims

1. The utility model provides an automatically controlled oil gas is downhole switch valve for well, a serial communication port, includes the valve body, the valve body includes top connection (1), lower clutch (2) and sets up valve plate storehouse (3) in the valve body, be provided with valve plate (4) in valve plate storehouse (3), be provided with sealed face (5) that can laminate with valve plate (4) in the valve body, all be provided with pressure sensor and temperature sensor on the tow sides of valve plate (4), valve plate storehouse (3) bottom is provided with first electromagnet (91), be provided with second electromagnet (92) on valve plate (4), be provided with third electromagnet (93) on sealed face (5), first electromagnet (91) second electromagnet (92) with third electromagnet (93) all with the control end electric connection on the earth's surface.

2. The downhole switch valve for the electric control oil and gas well according to claim 1, wherein a pivot structure (6) is arranged at one end of the valve plate (4) close to the upper joint (1), the valve plate (4) is fixedly connected with an outer ring of the pivot structure (6), and an inner shaft of the pivot structure (6) is fixedly connected with an inner wall of the valve body.

3. The downhole switch valve for the electrically controlled oil and gas well according to claim 1, wherein the angle between the sealing surface (5) and the valve plate chamber (3) is 43-46 °.

4. An electrically controlled downhole switching valve for oil and gas wells according to claim 1, wherein a plurality of the first electromagnet (91), the second electromagnet (92) and the third electromagnet (93) are provided.

5. An electrically controlled downhole switching valve for oil and gas wells according to claim 4, wherein the second electromagnets (92) are in one-to-one correspondence with the first electromagnets (91) and the third electromagnets (93), respectively.

6. A downhole switching valve for an electrically controlled oil and gas well according to claim 1, wherein the valve plate (4) is provided with an elliptical shape.

7. The downhole switch valve for the electric control oil and gas well according to claim 1, wherein a cable hole (7) is formed in the pipe wall of the valve body, and a sealing ring (8) is arranged at the outlet of the cable hole (7).