CN210460568U

CN210460568U - Corrosion resistant composite secondary metal seal hanger

Info

Publication number: CN210460568U
Application number: CN201920913632.5U
Authority: CN
Inventors: 殷义芳; 金立忠
Original assignee: Jiangsu Gute Petroleum Machinery Co Ltd
Current assignee: Jiangsu Gute Petroleum Machinery Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-05
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses an anti-corrosion composite secondary metal sealing hanger, wherein a composite sealing mechanism is arranged on a hanger body (3); a metal sealing ring (1) is arranged in an inner hole at the upper end of a hanger body (3), an O-shaped sealing ring (2) and an O-shaped sealing ring (4) are respectively arranged in an O-shaped ring groove on the hanger body (3), a metal sealing ring (5) is sleeved on an outer conical surface at the lower end of the hanger body (3), a sealing ring supporting ring (6) is sleeved on an outer circle at the lower end of the hanger body (3), a tightening nut (7) is arranged at the lower part of the sealing ring supporting ring (6) and is fixedly connected with the hanger body (3) through threads, and a tightening screw (8) penetrates through the tightening nut (7) and the hanger body (3)The hanger bodies (3) are connected. The upper part and the lower part of the hanger are both provided with rubber seals and metal seals, the structure is reasonable, the disassembly and the assembly are convenient, the sealing performance is reliable, and the hanger has stronger CO resistance₂、H₂S corrosion performance.

Description

Corrosion resistant composite secondary metal seal hanger

Technical Field

The utility model relates to a hanger, concretely relates to anticorrosive compound secondary metal seal's hanger.

Background

In an oil well head device, a hanger is arranged in an oil casing head and a casing pipe head, is used for hanging the oil casing pipe and sealing annular spaces between the oil pipe and the casing pipe and between the casing pipe and the casing pipe, and is an important part in an oil (gas) production well head device. Along with the development of the petroleum industry, the drilling working condition environment is more and more severe, in order to ensure the reliable sealing of the hanger, the main sealing of the hanger adopts metal sealing, the common metal sealing is integral taper metal sealing, once the integral taper metal sealing fails, the whole hanger is scrapped, and the maintenance cost is huge.

Disclosure of Invention

The utility model aims to provide a: the anti-corrosion composite secondary metal seal hanger is provided with rubber seals and metal seals at the upper part and the lower part, is convenient to detach and install, reliable in sealing performance and high in CO resistance₂、H₂S corrosion performance.

The technical solution of the utility model is that: the corrosion-resistant composite secondary metal sealing hanger comprises a hanger body and is characterized in that: a composite sealing mechanism is arranged on the hanger body, and comprises a first metal sealing ring, a first O-shaped sealing ring, a second metal sealing ring, a sealing ring supporting ring and a clamping nut; a metal sealing ring is arranged in an inner hole in the upper end of the hanger body, an O-shaped sealing ring and an O-shaped sealing ring are respectively arranged in an O-shaped ring groove in the hanger body, a metal sealing ring II is sleeved on an outer conical surface at the lower end of the hanger body, a sealing ring supporting ring is sleeved on an outer circle at the lower end of the hanger body, a fastening nut is arranged on the lower portion of the sealing ring supporting ring and is fixedly connected with the hanger body through threads, and a fastening screw penetrates through the fastening nut and is connected with the hanger body.

Wherein, No. two metal seal circles establish interior conical surface hole and outer cylinder face.

The upper end and the lower end of the first metal sealing ring are provided with a conical surface inner hole and an outer sealing surface, the outer sealing surface sequentially comprises a first conical surface, a second conical surface, a third conical surface, an arc groove, a fourth conical surface and a cylindrical surface, the first conical surface is connected with the second conical surface sharp corner, the third conical surface is tangent to the arc groove, and the fourth conical surface is tangent to the arc groove.

The utility model has the advantages of it is following:

1. the structure is reasonable, and the processing and the installation are convenient;

2. the second metal sealing ring is in line sealing and surface sealing, the metal sealing is realized by fixing the hanger body by rotating a jackscrew so as to be excited, the metal elasticity is adopted to enhance the metal sealing performance, and the sealing is reliable;

3. the first metal sealing ring is provided with a conical surface seal and a cylindrical surface seal, is in contact with the hanger body through the conical surface to realize sealing, is in contact with the oil/casing head through the cylindrical surface to realize sealing, is safe and reliable, is convenient to replace if invalid, is economical and practical, and saves cost;

4. has wide application range in CO₂、H₂S also has good sealing property in the environment with high corrosivity, and provides guarantee for safe production;

5. when the metal sealing ring is installed, because the size of the sealing ring is larger than the size of the inner hole of the hanger body or the upper flange body, the metal sealing ring is conveniently installed until the cylindrical surface and the inner hole of the hanger body or the upper flange body realize interference metal sealing through the line contact of the front part of the sealing surface and the elastic adjustment of the conical hole;

6. the design of the arc groove of the metal sealing ring effectively prevents stress concentration and ensures that the mechanical property of the metal sealing ring is not influenced.

Drawings

FIG. 1 is a schematic view of the hanger assembly;

FIG. 2 is a schematic view of a metal seal ring II;

FIG. 3 is a schematic view of a first metal seal ring;

fig. 4 is a partially enlarged view of fig. 3.

In the figure: the novel oil-gas seal ring comprises a metal seal ring 1, an O-shaped seal ring 2, a hanger body 3, an O-shaped seal ring 4, a metal seal ring 5, a seal ring backing ring 6, a nut 7, a set screw 8, a flange body 9, an oil/casing head body 10, an inner conical surface hole 11, an outer cylindrical surface 12, an outer sealing surface 13, a conical surface 14, a conical surface 15, a conical surface 16, an arc groove 17, a conical surface 18, a conical surface 19, a conical surface inner hole 20 and a jackscrew 21.

Detailed Description

The technical solution of the present invention is further explained below with reference to the accompanying drawings, but the technical solution is not to be construed as being limited thereto.

As shown in fig. 1-4, the corrosion resistant composite secondary metal seal hanger includes a hanger body 3 characterized by: a composite sealing mechanism is arranged on the hanger body 3, and comprises a first metal sealing ring 1, a first O-shaped sealing ring 2, a second O-shaped sealing ring 4, a second metal sealing ring 5, a sealing ring supporting ring 6 and a clamping nut 7; a metal seal ring 1 is installed in the hole of the upper end of hanger body 3, O type sealing washer 2, No. two O type sealing washers 4 are installed respectively in "O" type ring inslot on hanger body 3, No. two metal seal rings 5 cover on the outer conical surface of hanger body 3 lower extreme, sealing washer trunnion ring 6 covers on the excircle of hanger body 3 lower extreme, and lock nut 7 is installed in sealing washer trunnion ring 6 lower part and fixed with hanger body 3 with threaded connection, lock screw 8 passes and lock nut 7 is connected with hanger body 3.

Wherein, No. two metal seal rings 5 establish interior conical surface hole 11 and outer cylinder 12.

The upper end and the lower end of the first metal sealing ring 1 are provided with a conical surface inner hole 20 and an outer sealing surface 13, the outer sealing surface 13 is sequentially composed of a first conical surface 14, a second conical surface 15, a third conical surface 16, an arc groove 17, a fourth conical surface 18 and a cylindrical surface 19, the first conical surface 14 and the second conical surface 15 form a 10-degree sharp angle connection, the third conical surface 16 and the second conical surface 15 form a 1.75-degree sharp angle connection, the third conical surface 16 is tangent to the arc groove 17, and the fourth conical surface 18 is tangent to the arc groove 17.

During assembly: the hanger is arranged in a wellhead, and the upper end of the first metal sealing ring 1 and the inner hole of the upper flange body 9 form metal sealing; the first O-shaped sealing ring 2 and the upper flange body 9 form non-metal sealing; the second O-shaped sealing ring 4 and the oil/casing head body 10 form non-metal sealing; the second metal seal ring 5 forms a metal seal with the oil/casing head body 10.

Claims

1. The anti-corrosion composite secondary metal sealing hanger comprises a hanger body (3) and is characterized in that: a composite sealing mechanism is arranged on the hanger body (3), and comprises a first metal sealing ring (1), a first O-shaped sealing ring (2), a second O-shaped sealing ring (4), a second metal sealing ring (5), a sealing ring supporting ring (6) and a clamping nut (7); a metal seal ring (1) is installed in an inner hole in the upper end of a hanger body (3), an O-shaped seal ring (2) and an O-shaped seal ring (4) are installed in an O-shaped ring groove in the hanger body (3) respectively, a metal seal ring (5) is sleeved on an outer conical surface of the lower end of the hanger body (3), a seal ring supporting ring (6) is sleeved on an outer circle of the lower end of the hanger body (3), a tightening nut (7) is installed on the lower portion of the seal ring supporting ring (6) and fixed with the hanger body (3) in a threaded connection mode, and a tightening screw (8) penetrates through the tightening nut (7) and is connected with the hanger body (3).

2. The corrosion resistant composite secondary metal seal hanger of claim 1, wherein: the second metal sealing ring (5) is provided with an inner conical surface hole (11) and an outer cylindrical surface (12).

3. The corrosion resistant composite secondary metal seal hanger of claim 1, wherein: the upper end and the lower end of a first metal sealing ring (1) are provided with a conical surface inner hole (20) and an outer sealing surface (13), the outer sealing surface (13) is sequentially composed of a first conical surface (14), a second conical surface (15), a third conical surface (16), an arc groove (17), a fourth conical surface (18) and a cylindrical surface (19), the first conical surface (14) and the second conical surface (15) are connected through 10-degree sharp corners, the third conical surface (16) and the second conical surface (15) are connected through 1.75-degree sharp corners, the third conical surface (16) is tangent to the arc groove (17), and the fourth conical surface (18) is tangent to the arc groove (17).