CN218624153U

CN218624153U - Well head multistage sealing device

Info

Publication number: CN218624153U
Application number: CN202222484343.2U
Authority: CN
Inventors: 周为余; 周正权; 周正军; 洪仁全
Original assignee: Funing Petroleum Mechanic Co ltd
Current assignee: Funing Petroleum Mechanic Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-03-14
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses a multistage sealing device of well head relates to sealing device technical field, including the relief valve, two logical grooves have transversely been seted up with vertical in the inside of relief valve, and the internally mounted on relief valve top has a plurality of extrusion seal covers, the inside embedding of extrusion seal cover has extrusion seal gland, and the outer wall of extrusion seal cover installs spiral seal box, spiral seal box's inside is provided with spiral seal cover, and spiral seal box's inside embedding has spiral seal gland, the pressure cap is installed to spiral seal box's outer wall. The utility model discloses an extrusion seal cover and spiral seal cover carry out twice and seal, and the two moves separately, even damage appears in one of them part, another part also can normal operating to avoid appearing leaking.

Description

Well head multistage sealing device

Technical Field

The utility model relates to a sealing device technical field specifically is multistage sealing device of well head.

Background

At present, a wellhead device of a large four-way of a Christmas tree in China petroleum and petrochemical equipment is of a packing disc root type structure, a sucker rod and a packing disc are mutually rubbed in a production process, the packing disc is easy to damage, the sealing effect is not ideal enough, and leakage is easy to generate, so that adverse effects such as environmental pollution, misoperation and the like are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage sealing device of well head to it is relatively poor to solve the sealed effect that provides in the above-mentioned background art, appears the problem of seepage easily.

In order to achieve the above object, the utility model provides a following technical scheme: the multistage sealing device of well head, including the relief valve, two logical grooves have been seted up transversely and vertically in the inside of relief valve, and the internally mounted on relief valve top has a plurality of extrusion seal covers, the inside embedding of extrusion seal cover has extrusion gland, and the outer wall of extrusion seal cover installs spiral seal box, the inside of spiral seal box is provided with spiral seal cover, and the inside embedding of spiral seal box has spiral gland, the pressure cap is installed to spiral seal box's outer wall.

Preferably, the below of relief valve is provided with the clamp, and the bottom of relief valve extends to the inside of clamp, the bottom cover of relief valve outer wall is equipped with the universal joint cover, and the inside clamp outer wall cover of universal joint cover is equipped with the universal joint pad, the clamp outer wall of universal joint cover below is fixed with the nut catch.

Preferably, fixed sleeves are fixed at two ends of the outer wall of the safety valve, a rotary rod penetrates through the fixed sleeves, one end of the rotary rod extends to the inner portion of the safety valve, a sealing valve clack is arranged inside the safety valve, and a sealing ring is arranged between the outer wall of the safety valve and the inner wall of the fixed sleeves.

Preferably, the outer wall of the rotating rod is provided with external threads, and the inner wall of one end of the fixing sleeve is provided with internal threads matched with the internal threads.

Preferably, a circular cavity is formed in the sealing valve clack, a cylindrical block with the diameter matched with the diameter is fixed at one end of the rotating rod, and the cylindrical block and the circular cavity are connected in a rotating mode.

Preferably, the cross-sectional shape of the extrusion seal cartridge is W-shaped, and the extrusion seal cartridge is stacked inside the safety valve.

Preferably, the connection mode between the spiral sealing gland and the spiral sealing box is threaded connection, and the connection mode between the extrusion sealing gland and the safety valve is threaded connection.

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

1. the extrusion sealing sleeve of the device performs primary sealing, the spiral sealing sleeve also performs primary sealing, and the two parts operate respectively, so that even if one part is damaged, the other part can also operate normally, and leakage is avoided;

2. when leakage occurs, the rotating rods on the two sides are synchronously rotated to drive the sealing valve clacks to move, so that the two sealing valve clacks tightly press the polish rod, and the pressing cap on the top can be loosened to replace the sealing assembly.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

fig. 2 is a schematic view of the local front view cross-sectional structure of the present invention.

In the figure: 1. pressing the cap; 2. a spiral sealing gland; 3. a spiral seal cartridge; 4. a spiral seal box; 5. extruding the sealing gland; 6. extruding the sealing sleeve; 7. a safety valve; 8. rotating the rod; 9. a sealing valve flap; 10. a seal ring; 11. fixing a sleeve; 12. a universal joint sleeve; 13. a gimbal pad; 14. a nut lock ring; 15. and (5) clamping the hoop.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

First embodiment

Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic front sectional view of the present invention; fig. 2 is a schematic view of the local front view cross-sectional structure of the present invention.

The wellhead multistage sealing device comprises a safety valve 7;

a clamp 15 is arranged below the safety valve 7, the bottom end of the safety valve 7 extends into the clamp 15, a universal joint sleeve 12 is sleeved at the bottom end of the outer wall of the safety valve 7, a universal joint pad 13 is sleeved on the outer wall of the clamp 15 in the universal joint sleeve 12, and a nut locking ring 14 is fixed on the outer wall of the clamp 15 below the universal joint sleeve 12;

specifically, as shown in fig. 1, the bottom of the safety valve 7 can be rotated at any position by unscrewing the fixing sleeve 11, and then the fixing sleeve 11 is screwed to fix the bottom, so that the angles of the safety valve 7 and the clamp 15 can be adjusted to ensure that the center of the polish rod and the center of the sealing assembly above the safety valve 7 are not deflected.

Two through grooves are arranged in the safety valve 7 in the transverse direction and the vertical direction;

both ends of the outer wall of the safety valve 7 are fixed with fixing sleeves 11, rotating rods 8 penetrate through the fixing sleeves 11, one ends of the rotating rods 8 extend to the inside of the safety valve 7 and are provided with sealing valve clacks 9, and sealing rings 10 are arranged between the outer wall of the safety valve 7 and the inner wall of the fixing sleeves 11;

the outer wall of the rotating rod 8 is provided with an external thread, and the inner wall of one end of the fixing sleeve 11 is provided with an internal thread matched with the internal thread;

a circular cavity is formed in the sealing valve clack 9, a cylindrical block with the diameter matched with the rotating rod 8 is fixed at one end of the rotating rod 8, and the cylindrical block and the circular cavity are connected in a rotating mode;

specifically, as shown in fig. 1 and fig. 2, when it is found that the sealing assembly needs to be replaced due to leakage, the rotating rods 8 on both sides can be synchronously rotated, so that the rotating rods 8 push the sealing valve flaps 9 to move, and thus the two sealing valve flaps 9 tightly hold the polish rod, that is, the pressing cap 1 on the top can be loosened to replace the sealing assembly.

A plurality of extrusion seal sleeves 6 are arranged inside the top end of the safety valve 7, extrusion seal glands 5 are embedded inside the extrusion seal sleeves 6, spiral seal boxes 4 are arranged on the outer walls of the extrusion seal sleeves 6, spiral seal sleeves 3 are arranged inside the spiral seal boxes 4, spiral seal glands 2 are embedded inside the spiral seal boxes 4, and press caps 1 are arranged on the outer walls of the spiral seal boxes 4;

the section of the extrusion sealing sleeve 6 is W-shaped, and the extrusion sealing sleeve 6 is stacked in the safety valve 7;

specifically, as shown in fig. 1 and 2, the extrusion seal cartridge 6 of the device performs a primary seal, and the screw seal cartridge 3 also performs a primary seal, and both of them operate independently, and even if one of them is damaged, the other one can operate normally, thereby avoiding leakage.

The connection mode between the spiral sealing gland 2 and the spiral sealing box 4 is threaded connection, and the connection mode between the extrusion sealing gland 5 and the safety valve 7 is threaded connection;

specifically, as shown in fig. 1 and 2, the screw gland 2 and the pressing gland 5 are rotated until the polish rod is sealed without leakage, so that both seal assemblies can be operated at a proper tightness, and if leakage still occurs when the screw gland 2 and the pressing gland 5 are rotated to the maximum position, the seal assemblies are replaced.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. Multistage sealing device of well head, including the relief valve, its characterized in that: two logical grooves have been transversely and vertically seted up to the inside of relief valve, and the internally mounted on relief valve top has a plurality of extrusion seal covers, the inside embedding of extrusion seal cover has extrusion gland, and the outer wall of extrusion seal cover installs spiral seal box, the inside of spiral seal box is provided with spiral seal cover, and the inside embedding of spiral seal box has spiral seal gland, the pressure cap is installed to spiral seal box's outer wall.

2. A wellhead multistage sealing device according to claim 1, characterized in that: the below of relief valve is provided with the clamp, and the bottom of relief valve extends to the inside of clamp, the bottom cover of relief valve outer wall is equipped with the universal joint cover, and the inside clamp outer wall cover of universal joint cover is equipped with the universal joint pad, the clamp outer wall of universal joint cover below is fixed with the nut catch.

3. A wellhead multistage sealing device according to claim 1, characterized in that: the both ends of relief valve outer wall all are fixed with fixed cover, and the inside of fixed cover all runs through there is the rotary rod, the one end of rotary rod all extends to the internally mounted of relief valve and has sealed valve clack, install the sealing washer between the inner wall of relief valve outer wall and fixed cover.

4. A wellhead multistage sealing device according to claim 3, characterized in that: the outer wall of rotary rod is provided with the external screw thread, and the inner wall of fixed cover one end is provided with rather than assorted internal thread.

5. A wellhead multistage sealing device according to claim 3, wherein: a circular cavity is formed in the sealing valve clack, a cylindrical block with the diameter matched with the diameter is fixed at one end of the rotating rod, and the cylindrical block and the circular cavity are connected in a rotating mode.

6. A wellhead multistage sealing device according to claim 1, characterized in that: the cross-sectional shape of extrusion seal cover is the W type, and extrusion seal cover is in the inside of relief valve and piles up the setting.

7. A wellhead multistage sealing device according to claim 1, characterized in that: the spiral sealing gland and the spiral sealing box are connected in a threaded manner, and the extrusion sealing gland and the safety valve are connected in a threaded manner.