CN219387853U

CN219387853U - Blowout-preventing automatic sliding valve for geothermal well

Info

Publication number: CN219387853U
Application number: CN202223426012.XU
Authority: CN
Inventors: 姬振河; 李海兴; 宋利丰; 阴文成; 封优生
Original assignee: Handan Weiye Geothermal Development Co ltd
Current assignee: Hebei Weiye Geothermal New Energy Technology Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-07-21
Anticipated expiration: 2032-12-21

Abstract

The utility model relates to the technical field of high-temperature and high-pressure geothermal well drilling, in particular to an anti-blowout automatic sliding valve for a geothermal well; the utility model provides an upper valve body and a lower valve body which are connected by adopting threads, which is characterized in that: the device also comprises a core pipe arranged in the central position inside the upper valve body and the lower valve body, a diversion hole is formed in the upper part of the core pipe, and a slide valve component used for controlling the diversion hole to be closed when blowout occurs is arranged between the upper valve body and the lower valve body; the sliding valve component is designed in the sliding valve, so that the sliding valve component can move between the upper valve body and the lower valve body when blowout occurs, thereby closing the diversion hole on the upper part of the core pipe for conveying mud, and solving the problem that the core pipe cannot be plugged in time when blowout occurs in the geothermal drilling process in the prior art.

Description

Blowout-preventing automatic sliding valve for geothermal well

Technical Field

The utility model relates to the technical field of high-temperature and high-pressure geothermal well drilling, in particular to an anti-blowout automatic sliding valve for a geothermal well.

Background

With the increasing awareness of environmental protection, geothermal resources are favored by more and more national development companies as one of clean and efficient energy sources. The geothermal drilling technology is derived on the basis of oil and gas exploration, in order to adapt to the working requirements under high-temperature environment, higher requirements are put on conventional ground equipment, downhole tools, drilling technology and the like in petroleum drilling, and used materials and equipment not only need to meet the high-temperature operation requirement, but also need to adapt to work under high-temperature, high-pressure and steam environments. Therefore, more and more researchers begin to research advanced methods and materials that can adapt to high-temperature and high-pressure geothermal environments and can prevent accidents in the holes.

Because the temperature of a heat source is about 350 ℃ in the geothermal drilling process, the well depth of a geothermal well is about 1000-3500 m, and because of the existence of high-temperature steam, blowout accidents in geothermal drilling are particularly serious, mud is easy to take into drill cuttings and sediment to flow backwards during single connection, a drill bit water hole is blocked, and the danger of pump blocking occurs. Meanwhile, the existing float valve cannot adapt to high-temperature, multi-salt and corrosive environments, construction cost and risk coefficient are increased, and therefore, a sliding valve capable of temporarily blocking in time and recycling when blowout occurs is needed.

Disclosure of Invention

The utility model aims to solve the problem that in the geothermal drilling process in the prior art, a core pipe cannot be plugged in time when blowout occurs.

In order to solve the technical problems, the utility model provides an upper valve body and a lower valve body which are connected by adopting threads, which is characterized in that: the valve further comprises a core pipe arranged at the central position inside the upper valve body and the lower valve body, a diversion hole is formed in the upper portion of the core pipe, and a slide valve component used for controlling the diversion hole to be closed when blowout occurs is arranged between the upper valve body and the lower valve body.

The sliding valve component is designed in the sliding valve, so that the sliding valve component can move between the upper valve body and the lower valve body when blowout occurs, thereby closing the diversion hole on the upper part of the core pipe for conveying mud, and solving the problem that the core pipe cannot be plugged in time when blowout occurs in the geothermal drilling process in the prior art.

Drawings

FIG. 1 is a sectional view showing the whole structure of an automatic blowout prevention sliding valve for geothermal wells.

Fig. 2 is a schematic view of the E-E section of fig. 1.

Fig. 3 is a schematic diagram of the G-G cross section of fig. 1.

In the figure: 1. an upper valve body; 2. a lower valve body; 3. a core tube; 4. a sliding sleeve; 5. an upper limit retainer ring; 6. a lower baffle plate; 7. a deflector aperture; 8. a pressure balance hole; a main channel; a secondary channel; a non-porous disc.

Detailed Description

The utility model relates to an blowout-preventing automatic sliding valve for geothermal wells, which comprises an upper valve body 1 and a lower valve body 2 which are connected through threads, and further comprises a core pipe 3 arranged in the middle position inside the upper valve body 1 and the lower valve body 2, wherein a diversion hole 7 is formed in the upper part of the core pipe 3, and a slide valve component for controlling the diversion hole 7 to be closed when blowout occurs is arranged between the upper valve body 1 and the lower valve body 2.

As shown in fig. 1-3, the slide valve assembly comprises an upper limit retainer ring 5 arranged on the upper part of the inner wall surface of the upper valve body 1 and used for playing a role in height limit, and further comprises a lower baffle disc 6 arranged on the upper part of the inner wall surface of the lower valve body 2 and used for playing a role in bottom limit, wherein a sliding sleeve 4 arranged between the core tube 3 and the lower valve body 2 and used for sliding between the upper limit retainer ring 5 and the lower baffle disc 6 is arranged on the upper surface of the lower baffle disc 6.

As shown in fig. 1-3, a plurality of pressure balance holes 8 for mud to pass through are uniformly formed in the circumferential direction of the upper part of the lower baffle plate 6.

As shown in fig. 1-3, a main channel for conveying slurry is arranged between the upper valve body 1 and the outer wall of the core tube 3, a secondary channel for conveying slurry is arranged between the inner wall of the core tube 3 and the lower valve body 2, and the main channel and the secondary channel are communicated through a diversion hole 7 at the upper part of the core tube 3.

As shown in fig. 1-3, the number of the diversion holes 7 is a plurality, preferably 3-4, and the diversion holes are uniformly distributed around the circumferential direction of the core tube 3.

As shown in figures 1-3, the inner sides of the upper valve body 1, the lower valve body 2 and the sliding sleeve 4 and the surface of the core tube 3 are all subjected to high-temperature resistant and wear-resistant coating treatment.

As shown in fig. 1-3, the sliding sleeve 4 is of a T-shaped circular tube structure, the top of the sliding sleeve 4 is a non-porous disc, and the sliding sleeve 4 is matched with the inner wall of the upper valve body 1 and the outer wall of the core tube 3 to form a closed annular space, and can slide up and down in the space.

As shown in fig. 1-3, the core tube 3 and the lower baffle plate 6 are welded.

When the automatic sliding valve manufactured by the utility model is used by a user, when the drilling work is normally carried out, the sliding sleeve 4 is positioned at the lower baffle disc 6, after a blowout accident occurs, mud is gushed up to push the sliding sleeve 4 to gradually rise through the pressure balance hole 8, so that the sliding sleeve 4 gradually seals the diversion hole 7 to block the communication between the main channel and the auxiliary channel, and finally the sliding sleeve 4 stays at the upper limit check ring 5, thereby achieving the purpose of preventing blowout.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a geothermal well is with preventing spouting automatic sliding valve, includes last valve body (1) and lower valve body (2) that adopt threaded connection, its characterized in that: the valve further comprises a core pipe (3) arranged at the central position inside the upper valve body (1) and the lower valve body (2), a diversion hole (7) is formed in the upper portion of the core pipe (3), and a slide valve component used for controlling the diversion hole (7) to be closed when blowout occurs is arranged between the upper valve body (1) and the lower valve body (2).

2. The blowout-preventing automatic sliding valve for geothermal wells according to claim 1, wherein: the slide valve assembly comprises an upper limit retainer ring (5) arranged on the upper portion of the inner wall surface of the upper valve body (1), and further comprises a lower baffle disc (6) arranged on the upper portion of the inner wall surface of the lower valve body (2), wherein a sliding sleeve (4) arranged between the core tube (3) and the lower valve body (2) is arranged on the upper surface of the lower baffle disc (6).

3. The blowout-preventing automatic sliding valve for geothermal wells according to claim 2, wherein: the circumference direction of the upper part of the lower baffle disc (6) is uniformly provided with a plurality of pressure balance holes (8) for mud to pass through.

4. The blowout-preventing automatic sliding valve for geothermal wells according to claim 1, wherein: a main channel is arranged between the upper valve body (1) and the outer wall of the core tube (3), an auxiliary channel is arranged between the inner wall of the core tube (3) and the lower valve body (2), and the main channel and the auxiliary channel are communicated through a diversion hole (7) at the upper part of the core tube (3).

5. The blowout-preventing automatic sliding valve for geothermal wells according to claim 1, wherein: the number of the diversion holes (7) is a plurality, and the diversion holes are uniformly distributed around the circumferential direction of the core tube (3).

6. The blowout-preventing automatic sliding valve for geothermal wells according to claim 2, wherein: the inner sides of the upper valve body (1), the lower valve body (2), the sliding sleeve (4) and the surface of the core tube (3) are subjected to high-temperature-resistant and wear-resistant coating treatment.

7. The blowout-preventing automatic sliding valve for geothermal wells according to claim 2, wherein: the sliding sleeve (4) is of a T-shaped circular tube structure, the top of the sliding sleeve (4) is a non-porous disc, and the sliding sleeve (4) is matched with the inner wall of the upper valve body (1) and the outer wall of the core tube (3) to form a closed annular space.

8. The blowout-preventing automatic sliding valve for geothermal wells according to claim 2, wherein: the core tube (3) is welded with the lower baffle disc (6).