CN216811641U

CN216811641U - Gas well valve seat compensation sealing device

Info

Publication number: CN216811641U
Application number: CN202123290874.XU
Authority: CN
Inventors: 王帅; 刘欣; 王继峰; 于海; 郑向勇; 邵金海
Original assignee: Shaanxi Yanchang Petroleum Jinshi Drilling Equipment Co Ltd
Current assignee: Shaanxi Yanchang Petroleum Jinshi Drilling Equipment Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-06-24
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to the technical field of oil extraction, in particular to a compensation sealing device for a valve seat of a gas well valve. The gas well valve seat compensation sealing device comprises: a valve seat body; the sealing ring is in a step shape and is embedded in an annular groove formed in the valve seat body, and a compensating gasket used for compensating the sealing effect of the sealing ring is arranged on the bottom side of the sealing ring. According to the gas well valve seat compensation sealing device provided by the utility model, the compensation gasket is additionally arranged at the bottom of the sealing ring, when the rotary valve core is used later and extrudes the sealing ring, the extrusion force of the sealing ring can be transmitted to the compensation gasket, the higher the pressure is, the larger the extrusion expansion of the compensation gasket is, and the sealing ring can be reversely lifted, so that the tighter the joint between the sealing ring and the valve core is, the better the sealing effect is, and the sealing effect failure caused by the abrasion of the outer part of the seal and the occurrence of gaps on the contact surface of the valve core due to the scouring can be effectively prevented.

Description

Gas well valve seat compensation sealing device

Technical Field

The utility model relates to the technical field of oil extraction, in particular to a compensation sealing device for a valve seat of a gas well valve.

Background

As is well known, the sealing structure of a gate valve seat of a high-pressure valve for a traditional petroleum gas wellhead is mostly sealed by an FLS or an O-shaped ring.

In actual conditions, especially in the process of exploiting a gas well, a sealing surface can be continuously abraded due to scouring, and the sealing surface is damaged after a long time, so that the sealing of a valve seat is failed.

Therefore, there is a need to provide a new compensating sealing device for gas well valve seats to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a gas well valve seat compensation sealing device.

The utility model provides a gas well valve seat compensation sealing device, which comprises:

a valve seat body;

the sealing ring is in a step shape and is embedded in an annular groove formed in the valve seat body, and a compensating gasket used for compensating the sealing effect of the sealing ring is arranged on the bottom side of the sealing ring.

Preferably, the outer wall of the sealing ring is provided with a check ring in sliding connection, the check ring is slidably mounted in the annular groove, and the outer wall of the check ring is provided with a plurality of clamping blocks A and clamping blocks B which are distributed annularly.

Preferably, the sealing ring is provided with a plurality of scraping plates distributed in an annular shape, a plurality of fixedly connected installation rods are installed at the bottom sides of the scraping plates, and a plurality of fixedly connected convex rings are sleeved on the outer wall of each installation rod.

Preferably, the outer wall of the sealing ring is provided with a plurality of clamping grooves A which are distributed annularly, the specification of each clamping groove A is the same as that of each clamping block A, and the inner wall of each clamping groove A is respectively abutted against the outer wall of each clamping block A.

Preferably, the top side of the valve seat body is provided with a plurality of clamping grooves B distributed annularly, the specification of each clamping groove B is the same as that of each clamping block B, and the inner wall of each clamping groove B abuts against the outer wall of each clamping block B.

Preferably, a plurality of mounting grooves distributed annularly are formed in the top side of the top layer of the sealing ring, the inner wall of each mounting groove is connected with a mounting rod and a convex ring at the bottom side of the same scraper, and each scraper is slightly higher than the top side of the sealing ring.

Preferably, the annular groove is provided with a top side of the valve seat body, an inner bottom wall of the annular groove abuts against a bottom side of the compensating washer, and an inner wall of the annular groove abuts against outer walls of the sealing ring and the check ring respectively.

Compared with the prior art, the gas well valve seat compensation sealing device provided by the utility model has the following beneficial effects:

1. according to the utility model, the compensation gasket is additionally arranged at the bottom of the sealing ring, when the rotary valve core extrudes the sealing ring in later use, the extrusion force of the sealing ring can be transmitted to the compensation gasket by the sealing ring, and the higher the pressure is, the larger the extrusion expansion of the compensation gasket is, and the sealing ring can be reversely lifted, so that the tighter the joint between the sealing ring and the valve core is, and the better the sealing effect is, therefore, the sealing effect failure caused by the abrasion of the outer part of the seal and the gap of the contact surface of the valve core due to the scouring can be effectively prevented.

2. According to the utility model, through the arrangement of the check ring, the check ring can be clamped with the sealing ring through the clamping block A of the outer wall and can be limited by connecting the clamping block B and the clamping groove B with the valve seat body, so that the phenomenon that the sealing ring is distorted and deformed by friction force generated when the valve core rotates can be avoided.

3. According to the utility model, the convex scraper is embedded in the sealing ring, and the convex scraper can scrape the outer wall of the valve core, which is in contact with the sealing ring, when the valve core rotates in a later period, so that impurities adsorbed on the outer wall of the valve core can be cleaned to a certain extent, and the sealing ring can be attached to the outer wall of the valve core more tightly.

Drawings

FIG. 1 is a schematic structural view of a gas well valve seat compensating seal of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of the seal ring shown in FIG. 1;

FIG. 4 is a schematic structural view of the retainer ring shown in FIG. 1;

FIG. 5 is a schematic structural view of the valve seat body of FIG. 1;

FIG. 6 is a schematic view of the squeegee shown in FIG. 2;

FIG. 7 is a schematic view of the shim of FIG. 2;

fig. 8 is a structural diagram illustrating the overall appearance of the present invention.

Reference numbers in the figures: 1. a valve seat body; 2. a seal ring; 2a, a clamping groove A; 2b, mounting grooves; 3. a retainer ring; 3a, a clamping block A; 3B, a fixture block B; 4. an annular groove; 4a, a clamping groove B; 5. a compensating washer; 6. a squeegee; 6a, mounting a rod; 6b and a convex ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Referring to fig. 1 to 8, a gas well valve seat compensation sealing device provided by an embodiment of the present invention includes: valve seat body 1 and sealing washer 2.

In the embodiment of the present invention, referring to fig. 1, fig. 2, fig. 4 and fig. 7, the sealing ring 2 is stepped and is embedded in an annular groove 4 formed in the valve seat body 1, and a compensation gasket 5 for compensating the sealing effect of the sealing ring 2 is disposed on the bottom side of the sealing ring 2.

It should be noted that: install additional through compensating washer 5, when pivoted case extrudees sealing washer 2, sealing washer 2 then can transmit the extrusion force to compensating washer 5 on, then compensating washer 5 can reverse inflation when receiving the extruded this moment, can reverse to carry out the lifting to sealing washer 2 through compensating washer 5's reverse inflation, and the case is big more to sealing washer 2's extrusion force, compensating washer 5 extrusion inflation then is big more, can make sealing washer 2 and the laminating of case tighter, sealed effect then is better, thereby can effectively prevent to make sealed outside appear wearing and tearing and the contact surface of case appear the gap because of erodeing, cause the sealed effect of sealing washer 2 to become invalid.

In an embodiment of the present invention, referring to fig. 1, fig. 2, fig. 4 and fig. 5, a retainer ring 3 is slidably mounted on an outer wall of the seal ring 2, the retainer ring 3 is slidably mounted in the annular groove 4, and a plurality of annularly distributed clips A3a and a plurality of clips B3B are respectively disposed on the outer wall of the retainer ring 3.

It should be noted that: through the installation of retaining ring 3, and retaining ring 3 is made by the PEEK material, therefore the retaining ring 3 of stereoplasm can be through fixture block B3B and the smooth passing through fixture block A3a of being connected of valve seat body 1 and draw-in groove A2a spacing to sealing washer 2, and then make that sealing washer 2 can be stable be located ring channel 4.

In an embodiment of the present invention, referring to fig. 1, fig. 2, fig. 6, and fig. 8, a plurality of scraper plates 6 distributed in an annular shape are disposed on the sealing ring 2, a plurality of mounting rods 6a fixedly connected to the bottom sides of the scraper plates 6 are mounted on the bottom sides of the scraper plates 6, a plurality of convex rings 6b fixedly connected to the outer walls of the mounting rods 6a are sleeved on the outer walls of the mounting rods 6a, a plurality of mounting grooves 2b distributed in an annular shape are formed on the top side of the top layer of the sealing ring 2, the inner wall of each mounting groove 2b is connected to the mounting rod 6a and the convex ring 6b on the bottom side of the same scraper plate 6, and each scraper plate 6 is slightly higher than the top side of the sealing ring 2.

It should be noted that: through setting up scraper blade 6 in the position that is a little higher than the sealed top, make scraper blade 6 can be smooth scrape the impurity of case outer wall and get, and because scraper blade 6 inlays in sealing washer 2 through installation pole 6a and bulge loop 6b, consequently can be smooth when the extrusion force that the scraper loop received removes in sealing washer 2, can make the smooth laminating with the case outer wall of sealing washer 2.

In an embodiment of the present invention, referring to fig. 1, fig. 3, fig. 4 and fig. 8, a plurality of annularly distributed slots A2a are formed in an outer wall of the sealing ring 2, a specification of each slot A2a is the same as a specification of each fixture block A3a, an inner wall of each slot A2a abuts against an outer wall of each fixture block A3a, a plurality of annularly distributed slots B4a are formed in a top side of the valve seat body 1, a specification of each slot B4a is the same as a specification of each fixture block B3B, and an inner wall of each slot B4a abuts against an outer wall of each fixture block B3B.

It should be noted that: the specifications of the clamping groove A2a, the clamping groove B4a, the fixture block A3a and the fixture block B3B are set to be the same, so that when the retainer ring 3 is mounted in the later period, the retainer ring 3 can be more tightly connected with the valve seat body 1 and the sealing ring 2.

The top side of the valve seat body 1 is arranged on the annular groove 4, the inner bottom wall of the annular groove 4 abuts against the bottom side of the compensating washer 5, the inner wall of the annular groove 4 abuts against the outer walls of the sealing ring 2 and the check ring 3 respectively, and the sealing ring 2, the compensating washer 5 and the check ring 3 can be smoothly installed in the valve seat body 1 through the arrangement of the annular groove 4.

The working principle of the gas well valve seat compensation sealing device provided by the utility model is as follows:

when the sealing ring scraper is used later, when the sealing ring 2 is extruded in the rotating process of the valve core, the convex scraper 6 can scrape the outer wall of the valve core, which is contacted with the sealing ring 2, and impurities adsorbed on the outer wall of the valve core can be cleaned to a certain extent through scraping of the scraper 6, so that the sealing ring 2 can be attached to the outer wall of the valve core more tightly;

meanwhile, when the scraping rod is cleaned, the sealing ring 2 can be embedded into the sealing ring 2 under the extrusion of the valve core, so that the sealing ring 2 can be contacted with the outer wall of the valve core, the extrusion force of the sealing ring 2 in contact with the valve core is transmitted to the compensating washer 5, the higher the pressure on the compensating washer 5 is, the larger the extrusion expansion of the compensating washer 5 is, and the sealing ring 2 can be reversely lifted, so that the sealing ring 2 can be attached to the valve core more tightly, the better the sealing effect is, and the sealing effect failure caused by the rough surface of the sealing ring 2 due to the water flow scouring can be effectively prevented;

simultaneously through retaining

ring

3 and 3 outer wall fixture block A3a of retaining ring and fixture block B3B's setting, promptly smoothly with the stable card of sealing washer 2 in ring channel 4, consequently can avoid when the case rotates, the frictional force that sealing washer 2 received when the case rotates appears the distortion, causes the phenomenon that the gap appears in the contact surface of sealing washer 2 and case, and then can make the effect of sealing washer 2 outstanding more.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. Gas well valve disk seat compensation sealing device which characterized in that includes:

a valve seat body (1);

the sealing ring (2) is in a step shape and is embedded in an annular groove (4) formed in the valve seat body (1), and a compensating gasket (5) used for compensating the sealing effect of the sealing ring (2) is arranged on the bottom side of the sealing ring (2).

2. Gas well valve seat compensation sealing device according to claim 1, characterized in that the outer wall of the sealing ring (2) is provided with a slidably connected retaining ring (3), the retaining ring (3) is slidably arranged in the annular groove (4), and the outer wall of the retaining ring (3) is respectively provided with a plurality of annularly distributed clamping blocks A (3a) and B (3B).

3. Gas well valve seat compensation sealing device according to claim 1, characterized in that the sealing ring (2) is provided with a plurality of scrapers (6) distributed in an annular shape, a plurality of fixedly connected mounting rods (6a) are mounted on the bottom sides of the scrapers (6), and a plurality of fixedly connected convex rings (6b) are sleeved on the outer walls of the mounting rods (6 a).

4. Gas well valve seat compensation sealing device according to claim 2, characterized in that a plurality of clamping grooves a (2a) distributed annularly are formed in the outer wall of the sealing ring (2), the specification of each clamping groove a (2a) is the same as that of each clamping block a (3a), and the inner wall of each clamping groove a (2a) abuts against the outer wall of each clamping block a (3 a).

5. Gas well valve seat compensation sealing device according to claim 2, characterized in that the top side of the valve seat body (1) is provided with a plurality of annularly distributed clamping grooves B (4a), the specification of each clamping groove B (4a) is the same as that of each clamping block B (3B), and the inner wall of each clamping groove B (4a) abuts against the outer wall of each clamping block B (3B).

6. Gas well valve seat compensation sealing device according to claim 3, characterized in that the top side of the top layer of the sealing ring (2) is provided with a plurality of mounting grooves (2b) distributed annularly, the inner wall of each mounting groove (2b) is connected with a mounting rod (6a) and a convex ring (6b) at the bottom side of the same scraper (6), and each scraper (6) is slightly higher than the top side of the sealing ring (2).

7. Gas well valve seat compensating sealing device according to claim 1, characterized in that the annular groove (4) opens out the top side of the valve seat body (1), the inner bottom wall of the annular groove (4) abuts against the bottom side of the compensating washer (5), and the inner wall of the annular groove (4) abuts against the outer walls of the sealing ring (2) and the retainer ring (3), respectively.