A high temperature resistant rubber sealing ring for oil fields

Abstract

The present invention relates to the technical field of seals, and specifically to a high-temperature resistant rubber seal ring for oil fields. It comprises a high-temperature resistant seal ring body, a top ring is fixed on the upper end of the high-temperature resistant seal ring body, a bottom ring is fixed on the lower end of the high-temperature resistant seal ring body, two upper and lower intermediate rings are embedded and fixed in the high-temperature resistant seal ring body between the top ring and the bottom ring, the upper intermediate ring is fixedly connected to the top plate, the lower intermediate ring is fixedly connected to the bottom ring, a convex ring is processed on the inner edge of the high-temperature resistant seal ring body between the two intermediate rings, and an expansion component is arranged on the lower end of the high-temperature resistant seal ring body on the inner side of the bottom ring. In the present invention, the outer edge of the high-temperature resistant seal ring body part between the two intermediate rings can exert greater pressure on the inner edge of the wellhead device, so the sealing effect is good, and the sealing performance of the pipeline can be improved; the high-temperature resistant seal ring body can be prevented from being deformed, and the service life is long.

Description

Technical Field

[0001] The invention relates to the technical field of sealing elements, in particular to a high temperature resistant rubber sealing ring for oil fields. Background Art

[0002] In the process of oil production in oil fields, high-temperature steam is often needed for wax removal. The pipeline for transporting high-temperature steam needs to be connected to the wellhead device to prevent leakage of high-temperature steam. The pipeline for transporting high-temperature steam needs to be sealed and connected to the wellhead device. The general sealing ring used to seal the wellhead device and the pipeline is easy to soften and deform in a high-temperature environment, resulting in seal failure. The general sealing ring is not suitable for the sealing connection between the pipeline for transporting high-temperature steam and the wellhead device. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high temperature resistant rubber sealing ring for oil fields which has good sealing effect, can improve sealing performance, can be suitable for high temperature environment and has long service life.

[0004] In order to achieve the above object, the technical solution provided by the present invention is:

[0005] A high temperature resistant rubber sealing ring for oil fields comprises a high temperature resistant sealing ring body, a top ring is fixed at the upper end of the high temperature resistant sealing ring body, a bottom ring is fixed at the lower end of the high temperature resistant sealing ring body, two upper and lower intermediate rings are inlaid and fixed in the high temperature resistant sealing ring body between the top ring and the bottom ring, the upper intermediate ring is fixedly connected to the top plate, and the lower intermediate ring is fixedly connected to the bottom ring, a convex ring is processed on the inner edge of the high temperature resistant sealing ring body between the two intermediate rings, and an expansion component is arranged at the lower end of the high temperature resistant sealing ring body on the inner side of the bottom ring, the expansion component comprises an inlay ring which is concentric with the high temperature resistant sealing ring body, the upper end of the inlay ring is bent 90 degrees toward the axial direction of the high temperature resistant sealing ring body to form a bending portion, a cone ring is fixed inside the bending portion, the lower end of the cone ring has a smaller diameter than the upper end of the cone ring, a plurality of slots are evenly distributed on the circumference of the cone ring, a circular ring is arranged between the cone ring and the inlay ring, the lower end of the inlay ring is fixedly connected to the lower end of the cone ring by rubber, and the rubber encapsulates the circular ring between the inlay ring and the cone ring.

[0006] Specifically, the top ring is fixedly connected to the upper middle ring via a plurality of vertical upper rods, and the bottom ring is fixedly connected to the lower middle ring via a plurality of vertical lower rods.

[0007] Specifically, the outer edge of the top ring, the outer edge of the bottom ring and the outer edge of the middle ring are flush with the outer edge of the high temperature resistant sealing ring body.

[0008] Specifically, the inner edge of the bottom ring is fixedly connected to the outer edge of the insert ring.

[0009] Specifically, both upper and lower ends of the inner side of the convex ring are chamfered.

[0010] Specifically, the rubber is made of elastic rubber material.

[0011] Specifically, the ring is made of steel.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] According to the present invention, when the pipeline to be sealed enters into the high-temperature resistant sealing ring body, the pipeline can squeeze the convex ring, thereby expanding the high-temperature resistant sealing ring body part between the two intermediate rings. At the same time, under the action of the two intermediate rings, the two intermediate rings can limit the expansion amount of the high-temperature resistant sealing ring body part between them in the vertical direction. Therefore, after the pipeline squeezes the convex ring, the outer edge of the high-temperature resistant sealing ring body part between the two intermediate rings can exert greater pressure on the inner edge of the wellhead device, and the sealing effect is good; after the high-temperature resistant sealing ring body is installed in the wellhead device and squeezed, the circular ring can squeeze the conical ring upward, and after the conical ring is deformed, the high-temperature resistant sealing ring body part on the inner side of the conical ring exerts pressure on the pipeline, which can improve the sealing performance of the pipeline; the intermediate ring, the upper rod, the lower rod, the inlaid ring and the conical ring can play a role of a skeleton. When the high-temperature resistant sealing ring body works under a high-temperature annular state, the strength of the high-temperature resistant sealing ring body can be enhanced, and its deformation can be prevented, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the present invention.

[0015] Figure 2 A 3D view of the expanded component.

[0016] Figure 3 Bottom view of the expansion assembly

[0017] Figure 4 for Figure 3 A-shaped cross-sectional view in.

[0018] The names of the parts in the attached drawings are:

[0019] 1 High temperature resistant sealing ring body 2 Top ring 3 Bottom ring 4 Middle ring 5 Lower rod 6 Upper rod 7 Convex ring 8 Inlaid ring 9 Conical ring 10 Slot hole 11 Round ring 12 Rubber. DETAILED DESCRIPTION

[0020] like Figure 1-4As shown, a high-temperature resistant rubber sealing ring for oil fields comprises a high-temperature resistant sealing ring body 1, a top ring 2 is fixed on the upper end of the high-temperature resistant sealing ring body 1, and the outer edge of the top ring 2 is flush with the outer edge of the high-temperature resistant sealing ring body 1, a bottom ring 3 is fixed on the lower end of the high-temperature resistant sealing ring body 1, and the outer edge of the ring 3 is flush with the outer edge of the high-temperature resistant sealing ring body 1, and two upper and lower intermediate rings 4 are inlaid and fixed in the high-temperature resistant sealing ring body 1 between the top ring 2 and the bottom ring 3, and the outer edge of the intermediate ring 4 is flush with the outer edge of the high-temperature resistant sealing ring body 1, the top ring 2 is fixedly connected to the upper intermediate ring 4 by a plurality of vertical upper rods 6, and the bottom ring 3 is fixedly connected to the lower intermediate ring 4 by a plurality of vertical lower rods 5, and a convex ring 7 is processed on the inner edge of the high-temperature resistant sealing ring body 1 between the two intermediate rings 4, and the upper and lower ends of the inner side of the convex ring 7 are processed with chamfers, and an expansion component is arranged on the lower end of the high-temperature resistant sealing ring body 1 inside the bottom ring 3.

[0021] The expansion component includes an insert ring 8 which is concentric with the high temperature resistant sealing ring body 1, the inner edge of the bottom ring 3 is fixedly connected to the outer edge of the insert ring 8, the upper end of the insert ring 8 is bent 90 degrees toward the axial direction of the high temperature resistant sealing ring body 1 to form a bending portion, a cone ring 9 is fixed on the inner side of the bending portion, the lower port diameter of the cone ring 9 is smaller than the upper port diameter of the cone ring 9, a plurality of slots 10 are evenly distributed on the circumference of the cone ring 9, a circular ring 11 is arranged between the cone ring 9 and the insert ring 8, the lower end of the insert ring 8 is fixedly connected to the lower end of the cone ring 9 by a rubber 12, the rubber 12 encapsulates the circular ring 11 between the insert ring 8 and the cone ring 9, the circular ring 11 is made of steel, and the rubber 12 is made of elastic rubber.

[0022] During installation, install the high temperature resistant sealing ring body 1 into the installation groove of the wellhead device, and then use the end cover to squeeze the high temperature resistant sealing ring body 1. After the high temperature resistant sealing ring body 1 is squeezed, the ring 11 moves upward. During the upward movement of the ring 11, the cone ring 9 gathers, and at the same time, the part of the high temperature resistant sealing ring body 1 inside the cone ring 9 gathers toward the axial direction of the high temperature resistant sealing ring body 1. After the high temperature resistant sealing ring body 1 is installed, insert the steam transport pipeline into the high temperature resistant sealing ring body 1. After the pipeline passes through the high temperature resistant sealing ring body 1, the pipeline can squeeze the convex ring 7, thereby expanding the part of the high temperature resistant sealing ring body 1 between the two middle rings 4. At the same time, during the action of the two middle rings 4 In use, the two intermediate rings 4 can limit the expansion of the high-temperature resistant sealing ring body 1 part therebetween in the vertical direction. Therefore, after the pipeline squeezes the convex ring 7, the outer edge of the high-temperature resistant sealing ring body 1 part between the two intermediate rings 4 can exert greater pressure on the inner edge of the wellhead device, and the sealing effect is good. At the same time, the pressure of the high-temperature resistant sealing ring body 1 part gathered on the inner side of the cone ring 9 increases, which can improve the sealing performance of the pipeline. The intermediate ring 4, the upper rod 6, the lower rod 5, the inlaid ring 8 and the cone ring 9 can play a skeleton role. When the high-temperature resistant sealing ring body 1 works under a high-temperature ring, the strength of the high-temperature resistant sealing ring body 1 can be enhanced, and its deformation can be prevented, and the service life is long.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant rubber sealing ring for oil fields, comprising a high temperature resistant sealing ring body (1), characterized in that: A top ring (2) is fixed at the upper end of a high temperature resistant sealing ring body (1), a bottom ring (3) is fixed at the lower end of the high temperature resistant sealing ring body (1), two middle rings (4) arranged up and down are embedded and fixed in the high temperature resistant sealing ring body (1) between the top ring (2) and the bottom ring (3), the upper middle ring (4) is fixedly connected to the top plate, the lower middle ring (4) is fixedly connected to the bottom ring (3), a convex ring (7) is processed on the inner edge of the high temperature resistant sealing ring body (1) between the two middle rings (4), an expansion component is arranged at the lower end of the high temperature resistant sealing ring body (1) inside the bottom ring (3), the expansion component comprises an inlay ring (8) concentric with the high temperature resistant sealing ring body (1), the upper end of the inlay ring (8) is bent at 90 degrees toward the axial direction of the high temperature resistant sealing ring body (1) to form a bending portion, and a cone ring (7) is fixed inside the bending portion 9), the diameter of the lower port of the cone ring (9) is smaller than the diameter of the upper port of the cone ring (9), a plurality of slots (10) are evenly distributed on the circumference of the cone ring (9), a circular ring (11) is arranged between the cone ring (9) and the insert ring (8), the lower end of the insert ring (8) is fixedly connected to the lower end of the cone ring (9) by a rubber (12), and the rubber (12) seals the circular ring (11) between the insert ring (8) and the cone ring (9), the top ring (2) is fixedly connected to the upper intermediate ring (4) by a plurality of vertical upper rods (6), the bottom ring (3) is fixedly connected to the lower intermediate ring (4) by a plurality of vertical lower rods (5), the outer edges of the top ring (2), the bottom ring (3) and the intermediate ring (4) are flush with the outer edge of the high temperature resistant sealing ring body (1), and the inner edge of the bottom ring (3) is fixedly connected to the outer edge of the insert ring (8).

2. The high temperature resistant rubber sealing ring for oil field according to claim 1, characterized in that: The upper and lower ends of the inner side of the convex ring (7) are both chamfered.

3. The high temperature resistant rubber sealing ring for oil field according to claim 1, characterized in that: The rubber (12) is made of elastic rubber material.

4. The high temperature resistant rubber sealing ring for oil field according to claim 1, characterized in that: The ring (11) is made of steel.

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