CN215169893U

CN215169893U - Integral disk seat check valve

Info

Publication number: CN215169893U
Application number: CN202121334076.XU
Authority: CN
Inventors: 李伟; 彭文玥; 石擎天; 严佳琳; 马御琛; 彭玉婷; 石域亨
Original assignee: Chengdu Asberi Technology Co ltd
Current assignee: Chengdu Asberi Technology Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-14
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses an integral valve seat check valve, which comprises a lower joint, a valve seat, an O-shaped ring, a valve clack, an O-shaped ring, a retainer ring, an upper joint, a connecting pin and a torsional spring, wherein the upper joint, the lower joint and two groups of valve seat sealing mechanisms which are arranged in the lower joint and have the same structure and are connected in sequence are sequentially arranged from top to bottom; the valve seat sealing mechanism comprises an integral valve seat and a valve clack capable of being opened and closed, the valve clack is installed at the upper end of the valve seat through a connecting pin and a torsion spring, an O-shaped ring is installed on an upper conical surface of the valve seat and is sealed by rubber at low pressure, the O-shaped ring is extruded and deformed at high pressure, and a metal seal is formed between an upper conical surface of the valve seat and a lower conical surface of the valve clack. The utility model discloses the device can realize low pressure seal and also can realize high-pressure seal. The valve seat is of an integral structure, so that the reliability of the check valve is improved, and the number of parts is reduced. The valve clack and the valve seat are made of high-strength corrosion-resistant materials, so that the valve clack and the valve seat can bear high pressure and can also be used in an acid environment.

Description

Integral disk seat check valve

Technical Field

The utility model belongs to the technical field of oil and natural gas drilling engineering downhole tool, a integral disk seat single current valve is related to.

Background

In the well completion operation of the oil and gas field, working fluid needs to be normally injected into the well through the coiled tubing, but cannot flow upwards along the coiled tubing, so that the safety of the construction operation is ensured. When the pressure in the well is too high, inflammable and explosive gases such as hydrogen sulfide and natural gas at the bottom of the well return to the well head, and safety accidents are easy to happen, so that the coiled tubing needs to be provided with a check valve for operation under pressure and then the check valve is used for closing.

When the pressure in the well is lower or higher, the conventional check valve usually cannot play an effective sealing role, and the phenomenon of low-pressure leakage overflow or the phenomenon of high-pressure leakage backflow often occurs, so that great potential safety hazards are caused to field operation.

Disclosure of Invention

The utility model aims at providing an integral disk seat single current valve has solved prior art single current valve and is difficult to establish when pressure is low excessively sealedly, lets the sealing washer warp again easily when pressure is too high, causes sealed inefficacy scheduling problem.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides an integral disk seat check valve, includes the lower clutch, through threaded connection's top connection, installs in the inside same and disk seat sealing mechanism who connects gradually of two sets of structures of lower clutch, in the sealing mechanism, the disk seat that the valve clack passes through connecting pin and torsional spring coupling.

The valve seat sealing structure comprises an integral valve seat and a valve clack capable of being opened and closed, the valve clack is installed at the upper end of the valve seat through a pin and a torsion spring, the lower conical surface of the valve clack is matched with the upper conical surface of the valve seat, a sealing groove is reserved on the upper conical surface of the valve seat, an O-shaped ring is installed, and the lower end face of the O-shaped ring is in contact with the valve clack.

The valve seat is of an integral structure, so that the reliability of the check valve is improved, the quality controllability of the check valve is improved, and the number of parts is reduced as much as possible.

The valve body is sealed by rubber at low pressure, and the lower conical surface of the valve clack and an O-shaped ring on the valve seat form sealing; the valve is in metal sealing under high pressure, the O-shaped ring is extruded and deformed under high pressure, and the lower conical surface of the valve clack and the upper conical surface of the valve seat form metal sealing.

The waist circle hole structure and the diameter ratio of the connection hole design of valve clack are big than the diameter of matched with connecting pin for the valve clack can form floating seal automatically according to the pressure level.

The valve clack and the valve seat of the valve body are made of high-strength corrosion-resistant special materials, can well bear high pressure, and can be used in an acid environment.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model provides an integral structure that disk seat adopted compares with the split type structure of tradition, has increased the reliability of single current valve, improves the controllability of its quality, spare part quantity of minimizing simultaneously.

(2) The utility model changes the single sealing mode of the traditional check valve, and is rubber-sealed when in low pressure, and the lower conical surface of the valve clack and the O-shaped ring on the valve seat form rubber seal; the valve clack is in metal sealing at high pressure, the O-shaped ring is extruded and deformed at high pressure, and the lower conical surface of the valve clack and the upper conical surface metal sealing surface of the valve seat form metal sealing, so that the sealing effect is more efficient and more stable.

(3) The utility model discloses the waist circle pore structure and the diameter ratio matched with connecting pin diameter of the connecting hole design of well valve clack are big for the valve clack can be according to the pressure rank, and automatic formation floating seal.

(4) Different from traditional design, this utility model provides a valve clack and the anticorrosive special material of high strength that the disk seat used, can be fine bear the high pressure and use in acid environment.

Drawings

FIG. 1 is a schematic diagram of a unitary seat check valve.

Fig. 2 is a schematic view of a valve seat structure.

In the figure, 1, a lower joint, 2, a valve seat, 3, an O-shaped ring, 4, a valve clack, 5, an O-shaped ring, 6, a retainer ring, 7, an upper joint, 8, a connecting pin, 9, a torsional spring and 10, a metal sealing surface.

Fig. 3 is a schematic view of the rubber seal at low pressure.

Fig. 4 is a schematic view of a metal seal at high pressure.

Detailed Description

The present invention will be described in detail with reference to the drawings and detailed description, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the utility model discloses a structure comprises parts such as lower clutch 1, integral disk seat 2, O type circle 3, valve clack 4, O type circle 5, retaining ring 6, top connection 7, connecting pin 8, torsional spring 9, metal seal face 10. The integral valve seat 2 is designed to be of an integral structure, so that the reliability of the check valve is improved, the quality controllability of the check valve is improved, and the number of parts is reduced as much as possible.

The working principle of the embodiment is as follows: in the normal construction operation process, the upper joint 7 and the lower joint 1 which are connected end to end through threads, and the valve seat sealing structure which is arranged in the lower joint and has the same two groups of structures and is connected in sequence.

As shown in fig. 1, the valve seat sealing mechanism comprises a valve seat 2 and a valve flap 4 capable of opening and closing, the valve flap 4 is installed at the upper end of the integral valve seat 2 through a connecting pin 8, the lower conical surface of the valve flap 4 is matched with the upper conical surface of the valve seat 2, a sealing groove is reserved on the upper conical surface of the valve seat 2, an O-shaped ring 3 is installed, and the lower end surface of the O-shaped ring 3 is in contact with the valve flap 4.

Furthermore, the valve seat 2 is of an integral structure, so that the reliability of the check valve is improved, the quality controllability of the check valve is improved, and the number of parts is reduced as much as possible.

Furthermore, the integral valve seat check valve is sealed by rubber at low pressure, and the lower conical surface of the valve clack 4 and the O-shaped ring 3 on the upper conical surface of the valve seat 2 form sealing; the valve seat is metal-sealed under high pressure, and after the O-shaped ring 3 is extruded and deformed under high pressure, the lower conical surface of the valve clack 4 and the upper conical surface metal sealing surface 10 of the valve seat 2 form metal sealing.

Furthermore, the connecting hole of the valve clack 4 is of a waist-round hole structure, and the diameter of the connecting hole is larger than that of the connecting pin 8 matched with the connecting hole, so that the valve clack 4 can automatically form floating seal according to the pressure level.

Furthermore, the valve seat 2 and the valve clack 4 of the valve body are made of special materials with high strength and corrosion resistance, can well bear high pressure and can be used in an acid environment.

The above embodiments are only specific ones of the present invention, and the protection scope of the present invention includes but is not limited to the product form and style of the above embodiments, any suitable changes or modifications to the novel integrated valve seat check valve tool and any person of ordinary skill in the art according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims

1. An integral disk seat check valve which characterized in that: the valve seat sealing device comprises a lower connector (1), an upper connector (7) connected through threads, two groups of valve seat sealing mechanisms which are same in structure and connected in sequence and are arranged in the lower connector (1), and a valve clack (4) and a valve seat (2) connected through a connecting pin (8) and a torsion spring (9) in each sealing mechanism.

2. A unitary seat check valve as defined in claim 1 wherein: the valve seat (2) is of an integral structure, so that the reliability of the check valve is improved, the quality controllability of the check valve is improved, and the number of parts is reduced as much as possible.

3. A unitary seat check valve as defined in claim 1 wherein: rubber sealing is performed at low pressure, and the lower conical surface of the valve clack (4) and the O-shaped ring (3) on the valve seat (2) form sealing; the valve is in metal sealing under high pressure, and after the O-shaped ring (3) is extruded and deformed under high pressure, the lower conical surface of the valve clack (4) and the upper conical surface of the valve seat (2) form a metal sealing surface (10).

4. A unitary seat check valve as defined in claim 1 wherein: the connecting hole of the valve clack (4) is designed as a waist round hole, and the diameter of the connecting hole is larger than that of the connecting pin (8) matched with the connecting hole, so that the valve clack (4) can automatically form floating seal according to the pressure level.

5. A unitary seat check valve as defined in claim 1 wherein: the valve seat (2) and the valve clack (4) of the valve body are made of high-strength corrosion-resistant materials.

6. An integral disk seat check valve which characterized in that: the valve seat sealing mechanism comprises an integral valve seat (2) and a valve clack (4) capable of opening and closing, the valve clack (4) is installed at the upper end of the integral valve seat (2) through a connecting pin (8) and a torsion spring (9), and the lower conical surface of the valve clack (4) is matched with the upper conical surface in the integral valve seat (2); a sealing groove is reserved at the port of the inner side of the valve seat (2), an O-shaped ring (3) is installed, and the lower end face of the O-shaped ring (3) is in contact with the valve clack (4).