CN217081397U

CN217081397U - Insert type metal seal

Info

Publication number: CN217081397U
Application number: CN202220364369.0U
Authority: CN
Inventors: 李一村; 赵宇阳; 王海硕; 黄浩
Original assignee: Tianjin Materui Technology Co ltd
Current assignee: Tianjin Materui Technology Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-29
Anticipated expiration: 2032-02-22

Abstract

The utility model provides an inserted type metal seal relates to mechanical seal technical field, include: the method comprises the following steps: metal sealing ring and wedge push ring, wedge push ring includes: extrusion head, metal sealing ring includes: the inner side sealing wall, outside sealing wall and elasticity portion, be provided with first annular groove between inner side sealing wall and the outside sealing wall, be provided with metal seal ring on the inner side sealing wall, be provided with the elasticity portion on the outside sealing wall, the elasticity portion sets up the notch position in the first annular of outside sealing wall, be provided with the second annular groove between elasticity portion and the outside sealing wall, the notch orientation of second annular groove is opposite with the notch orientation of first groove, the extrusion head nestification is in first annular groove, the extrusion head makes the notch of first annular groove open, the laminating of elasticity portion is on sheathed tube inner wall, metal seal ring laminating is at the dabber. Through the arrangement of the structure, the sealing effect of the metal sealing element can be improved, and the friction force between the metal sealing element and the pipe wall can be increased while the underground pressure is increased so as to ensure the sealing effect of the metal sealing element.

Description

Insert type metal seal

Technical Field

The utility model relates to a mechanical seal technical field particularly, relates to inserted type metal seal spare.

Background

At present, the oil downhole operation mostly uses rubber sealing rings, but because the downhole environment is complex, the temperature is generally higher, swelling liquid or underwater pressure can exist, great threats exist to the sealing effect and the service life of the rubber sealing rings, the sealing effect of the rubber sealing rings can be influenced by the phenomena that the rubber sealing rings are corroded and emulsified in the using process, or the rubber sealing rings are aged in normal use, and the like, therefore, the use of metal sealing elements in the downhole operation is gradually increased, the metal sealing elements guarantee the sealing effect by the friction force between the metal sealing elements and the pipe wall, but in the sealing process of the metal sealing elements, the bearing capacity of most metal sealing elements is not strong enough, the friction force between the metal sealing elements and the pipe wall is not correspondingly increased when the downhole pressure is increased, which can lead the metal sealing elements to be loosened, and therefore, how to improve the bearing capacity of the metal sealing elements, the technical problem to be solved is to ensure the sealing effect when the metal sealing element is initially sealed and increase the underground pressure and the friction force between the metal sealing element and the pipe wall to ensure the sealing effect of the metal sealing element.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among prior art or the correlation technique at least, disclose an insertion type metal seal spare, both guaranteed sealed effect when metal seal spare is initial sealed, sealed effect is better, can increase the sealed effect of frictional force in order to guarantee metal seal spare of metal seal spare with the pipe wall again in the increase of pressure in the pit.

The utility model discloses a following scheme realizes: an insert-type metal seal comprising: metal seal ring and wedge push ring, metal seal ring includes: inboard sealed wall, outside sealed wall and elasticity portion, be provided with first annular groove between inboard sealed wall and the outside sealed wall, be provided with metal seal ring on the inboard sealed wall, be provided with the elasticity portion on the outside sealed wall, the elasticity portion sets up the notch position in the first annular groove of outside sealed wall, be provided with the second annular groove between elasticity portion and the outside sealed wall, the notch orientation of second annular groove is opposite with the notch orientation of first annular groove, the wedge pushes away the ring and includes: the extrusion head is nested in the first annular groove, the notch of the first annular groove is opened by the extrusion head, the elastic part is attached to the inner wall of the sleeve, and the metal sealing ring is attached to the mandrel.

According to the utility model discloses an insert type metal seal, preferably, elasticity portion, inboard sealed wall and outside sealed wall are integrative structure.

According to the utility model discloses an insertion type metal seal spare, preferably, be provided with first cavity between inboard sealed wall and the extrusion head, be provided with the second cavity between outside sealed wall and the extrusion head.

According to the utility model discloses an insertion type metal seal spare, preferably, metal seal ring's sealed face is the arc surface, and the roughness of metal seal ring's sealed face is 0.8 micron and below.

According to the utility model discloses an inserted metal seal spare, its characterized in that, the radius of metal seal ring's cross section is 2mm ~ 5 mm.

According to the utility model discloses an inserted metal seal spare, preferably, when the wedge pushes away the ring and is not nested in first annular groove, be clearance fit between outside sealed wall and the sleeve pipe, and the distance between outside sealed wall and the sleeve pipe is 0.18mm ~ 0.23 mm.

According to the utility model discloses an insertion type metal seal spare, preferably, wedge pushing ring and metal seal ring between for wedging the cooperation extrusion head inboard edge and the contained angle between the vertical direction and the contained angle between outside limit and the vertical direction all be greater than 3.

According to the utility model discloses an insert type metal seal, preferably, the metal sealing washer is made by corrosion-resistant and high temperature resistant elastic metal material.

According to the insert type metal seal of the present disclosure, preferably, the elastic metal material is TA2 or beryllium bronze or 65Mo or stainless steel.

The beneficial effects of the utility model include at least: the metal sealing ring comprises an inner sealing wall, an outer sealing wall, a first annular groove, a metal sealing ring, an elastic part, a second annular groove, a first annular groove, a second annular groove, a first groove, a second groove, a first annular groove, a second annular groove, a first annular groove, a second annular groove, a third annular groove, a fourth annular groove. Moreover, pressure in the pit is great, and pressure in the pit is used in first cavity and second cavity, carries out further extrusion to inside seal wall and outside seal wall to make metal seal ring's sealed effect better, metal seal ring is made by corrosion-resistant and high temperature resistant elastic metal material, and application temperature wide range is resistant to the fire and burns.

Drawings

Fig. 1 shows a schematic structural diagram of an insert-type metal seal according to an embodiment of the present invention.

Fig. 2 shows a schematic top view of an insert-type metal seal structure according to an embodiment of the present invention.

Fig. 3 shows a schematic cross-sectional view a-a of fig. 2, according to an embodiment of the invention.

Fig. 4 shows a partially enlarged schematic view of C in fig. 3 according to an embodiment of the present invention.

Fig. 5 shows a partially enlarged schematic view of E in fig. 3 according to an embodiment of the present invention.

In the figure: 1. a metal seal ring; 2. a wedge-shaped push ring; 3. an extrusion head; 4. an inner side sealing wall; 5. a first annular groove; 6. a metal seal ring; 7. an elastic portion; 8. a second annular groove; 9. an outer sealing wall; 10. a first cavity; 11. a second cavity.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the present invention provides an insertion type metal sealing element extrusion head 3, including: metal seal ring 1 and wedge push ring 2, metal seal ring 1 includes: inboard sealed wall 4, outside sealed wall 9 and elasticity portion 7, be provided with first annular groove 5 between inboard sealed wall 4 and the outside sealed wall 9, be provided with metal seal ring 6 on the inboard sealed wall 4, be provided with elasticity portion 7 on the outside sealed wall 9, elasticity portion 7 sets up the notch position in the first annular groove of outside sealed wall 9, be provided with second annular groove 8 between elasticity portion 7 and the outside sealed wall 9, the notch orientation of second annular groove 8 is opposite with the notch orientation of first annular groove, wedge pushing ring 2 includes: extrusion head 3, extrusion head 3 nestification is in first annular groove 5, and extrusion head 3 makes the notch of first annular groove 5 open, and elastic component 7 laminates on the sheathed tube inner wall, and metal seal ring 6 laminates on the dabber.

According to the above embodiment, the elastic portion 7, the inner seal wall 4, and the outer seal wall 9 are preferably all of an integral structure.

According to the above embodiment, preferably, a first cavity 10 is provided between the inner sealing wall 4 and the extrusion head 3, and a second cavity 11 is provided between the outer sealing wall 9 and the extrusion head 3.

According to the above embodiment, the sealing surface of the metal seal ring 6 is preferably a circular arc surface, and the roughness level of the sealing surface of the metal seal ring 6 is preferably 0.8 μm or less.

According to the above embodiment, the radius of the cross section of the metal seal ring 6 is preferably 2mm to 5 mm.

According to the above embodiment, preferably, when the wedge-shaped push ring 2 is not nested in the first annular groove 5, the outer sealing wall 9 and the sleeve are in clearance fit, and the distance between the outer sealing wall 9 and the sleeve is 0.18mm to 0.23 mm.

According to the above embodiment, preferably, the wedge-shaped push ring 2 and the metal seal ring 1 are in wedged fit, and both the included angle between the inner side edge of the extrusion head 3 and the vertical direction and the included angle between the outer side edge of the extrusion head and the vertical direction are greater than 3 °.

According to the above embodiment, the metal seal ring 1 is preferably made of an elastic metal material that is resistant to corrosion and high temperature.

According to the above embodiment, preferably, the elastic metal material is TA2 or beryllium bronze or 65Mo or stainless steel.

In the embodiment, after the metal seal ring 1 is put into a casing along with a part, the notch of the first annular groove 5 faces the bottom of the well, clearance fit is formed between the metal seal ring 6 and a mandrel and between the elastic part 7 and the inner wall of the casing, the wedge-shaped push ring 2 is nested in the first annular groove 5, the extrusion head 3 of the wedge-shaped push ring 2 plays a role in extruding the metal seal ring 1, at the moment, the outer sealing wall 9 of the first annular groove 5 and the inner sealing wall 4 of the first annular groove 5 are elastically deformed, so that the notch of the annular groove is opened, the elastic part 7 is pressed against the inner wall of the casing, the metal seal ring 6 is extruded and attached to the mandrel to realize bidirectional sealing, the extrusion head 3 is extruded in the first groove, meanwhile, the elastic part 7 is pressed against the inner wall of the casing, under the action of bidirectional elastic force, the extrusion force between the metal seal ring 1 and the casing and the mandrel is increased, the tightness between the metal sealing ring 1 and the sleeve and the mandrel is improved, and under the underground pressure, gas in the well enters the first cavity 10 and the second cavity, the inner side sealing wall 4 and the outer side sealing wall 9 are further extruded, the metal sealing ring 1 is pressed more and more tightly under the condition of increasing the underground pressure, the reliability is higher, and the sealing performance is more stable.

In another embodiment, after the metal seal ring 1 is put into the casing along with the component, the notch of the first annular groove 5 faces the bottom of the well, the metal seal ring 6 on the inner side seal wall 4 is in interference fit with the mandrel, the elastic part 7 abuts against the inner wall of the casing, under the dual action of the elastic part 7 and the extrusion head 3, the pressure of the metal seal ring 1, the mandrel and the inner wall of the casing is increased, the sealing performance between the metal seal ring 1, the casing and the mandrel is increased, and under the pressure of the well, the gas in the well acts in the first cavity 10 and the second cavity to further extrude the metal seal ring 1, and under the condition that the pressure in the well is increased, the metal seal ring 1 is pressed more and more tightly, the reliability is high, and the sealing performance is better.

According to the above embodiment, the elastic metal material is preferably TA2 or beryllium bronze or 65Mo or stainless steel, and has a wide applicable temperature range, and is resistant to burning and corrosion.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An insert-type metal seal, comprising: metal sealing washer (1) and wedge push ring (2), metal sealing washer (1) includes: inboard sealed wall (4), outside sealed wall (9) and elasticity portion (7), inboard sealed wall (4) with be provided with first annular groove (5) between outside sealed wall (9), be provided with metal seal ring (6) on inboard sealed wall (4), be provided with elasticity portion (7) on outside sealed wall (9), elasticity portion (7) set up the notch position of first annular groove (5) on outside sealed wall (9), elasticity portion (7) with be provided with second annular groove (8) between outside sealed wall (9), the notch orientation of second annular groove (8) with the notch orientation of first annular groove (5) is opposite, and extrusion head (3) nestification is in first annular groove (5), wedge push ring (2) include: the extrusion head (3) enables the notch of the first annular groove (5) to be opened, the elastic part (7) is attached to the inner wall of the sleeve, and the metal sealing ring (6) is attached to the mandrel.

2. Insert-type metal seal according to claim 1, characterized in that the elastic portion (7), the inner sealing wall (4) and the outer sealing wall (9) are all of one piece construction.

3. Insert-type metal seal according to claim 1, characterized in that a first cavity (10) is provided between the inner sealing wall (4) and the extrusion head (3), and a second cavity (11) is provided between the outer sealing wall (9) and the extrusion head (3).

4. The insert-type metal seal according to claim 1, wherein the sealing surface of the metal seal ring (6) is a circular arc surface, and the roughness of the sealing surface of the metal seal ring (6) is 0.8 μm or less.

5. Insert type metal seal according to claim 1, characterized in that the radius of the cross-section of the metal sealing ring (6) is 2-5 mm.

6. The insert metal seal according to claim 1, wherein when the wedge shaped push ring (2) is not nested in the first annular groove (5), there is a clearance fit between the outer seal wall (9) and the casing, and the distance between the outer seal wall (9) and the casing is 0.18mm to 0.23 mm.

7. The insert-type metal seal according to claim 1, characterized in that the wedge-shaped push ring (2) and the metal seal ring (1) are in wedged fit, and the included angle between the inner side edge of the extrusion head (3) and the vertical direction and the included angle between the outer side edge of the extrusion head (3) and the vertical direction are both greater than 3 °.

8. Insert-type metal seal according to claim 1, characterized in that the metal sealing ring (1) is made of a resilient metal material resistant to corrosion and high temperatures.

9. An insert-type metal seal according to claim 8, wherein the resilient metal material is TA2 or beryllium bronze or 65Mo or stainless steel.