CN219139019U

CN219139019U - Energy storage type multistage sealing device

Info

Publication number: CN219139019U
Application number: CN202320140195.4U
Authority: CN
Inventors: 李栋; 张雨生; 刘国永; 张勋
Original assignee: Puyang Donghao Mechanical & Electronic Co ltd
Current assignee: Puyang Donghao Mechanical & Electronic Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-06
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to the technical field of oil and gas well equipment, in particular to an energy storage type multistage sealing device. The blowout preventer comprises a blowout preventer body, wherein a lower connecting sleeve is fixed at the upper end of the blowout preventer body, a ball groove is formed in the upper end of the lower connecting sleeve, a ball head part is machined at the lower end of an adjusting sleeve, the ball head part of the adjusting sleeve is rotationally and hermetically connected in the ball groove, a gland is sleeved on the lower connecting sleeve and is in threaded connection with the lower connecting sleeve, the gland is rotationally connected with the ball head part of the adjusting sleeve and limits the ball head part of the adjusting sleeve in the ball groove, a plurality of conical packing is placed in a conical section of the adjusting sleeve, a plurality of round packing is placed in a straight section, an air bag box body is arranged above the adjusting sleeve, an annular air bag is fixed in the air bag body, and a plurality of sealing packing is installed in the annular air bag. The adjusting sleeve of the sealing device is connected with the lower connecting sleeve through the ball head part, has a aligning function, can realize the eccentric wear prevention of the polish rod, and prolongs the service life of the polish rod.

Description

Energy storage type multistage sealing device

Technical Field

The utility model relates to the technical field of oil and gas well equipment, in particular to an energy storage type multistage sealing device.

Background

The packing box of the wellhead of the pumping unit is wellhead equipment of the pumping unit, is connected with a wellhead three-way valve, is internally sealed by packing, and has the main function of sealing a polished rod of a pumping rod and preventing blowout and pollution caused by leakage of liquid in the well.

At present, a plurality of common packing boxes are applied to the oilfield on site, and the packing boxes are not consistent with the eccentric quantity of an actual polish rod, so that the packing and the packing box body are easy to eccentric wear. Leakage occurs when the packing or the cartridge body is damaged, and the packing or even the entire packing must be replaced. Meanwhile, the service life of the polish rod is shortened and oil leakage is caused due to abrasion between the sucker rod and the packing box caused by deflection of the sucker rod. This not only causes waste of crude oil, but also causes pollution to the environment. And the packing is very troublesome to replace, and delays production, wastes time and labor and other unsafe factors. The packing replacement frequency is high in oilfield field application, well stopping replacement is needed for preventing leakage, and the tightness of the packing is adjusted. According to incomplete statistics, the pumping unit stops the well at most once every two days, at least two times a month are averagely performed, and the time of stopping the well every time is not less than 2 hours, so that the pumping time is affected, and the oil well yield is affected. In addition, because the common packing box has no blowout preventing structure, blowout phenomenon can be caused when a wellhead polished rod breaks, and the environment is greatly polluted. Aiming at the defects existing in the prior art, the utility model aims to provide an energy storage type multistage sealing device.

Disclosure of Invention

The utility model aims to solve the technical problems that the energy storage type multistage sealing device has blowout prevention and aligning functions, can realize the eccentric wear prevention of a polished rod, prolongs the service life of the polished rod, and can effectively prevent well fluid leakage by multistage sealing.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides an energy storage formula multistage sealing device, including the preventer body, the preventer body upper end is fixed with down the adapter sleeve, the ball groove has been seted up to lower adapter sleeve upper end, the bulb portion of adapter sleeve rotates sealing connection in the ball groove, the cover is equipped with the gland on the adapter sleeve down, gland and lower adapter sleeve threaded connection, the gland rotates with the bulb portion of adapter sleeve to be connected and restrict the bulb portion of adapter sleeve in the ball groove, processing has cone section and straight section in the adapter sleeve of bulb top, straight section is located cone section top, a plurality of toper packing has been placed in the cone section of adapter sleeve, a plurality of circular packing has been placed to straight section, the top toper packing is tightly supported the circular packing of below, the adapter sleeve top is provided with the gasbag box body, gasbag casing and adapter sleeve fixed sealing connection through last adapter sleeve, the circular packing of top and gasbag casing elastic connection, be fixed with annular gasbag in the gasbag, install a plurality of sealing packing in the annular gasbag, run through a plurality of sealing packing in proper order, circular packing, toper packing and preventer.

Specifically, the blowout preventer body includes the blowout preventer casing, and blowout preventer casing both ends all threaded connection has the end cap, is equipped with blowout prevention piston in the blowout preventer casing of polished rod both sides, and blowout prevention piston corresponds with the end cap, all threaded connection has the adjustment lead screw on the end cap, adjustment lead screw and blowout prevention piston swivelling joint. The blowout prevention piston realizes blowout prevention opening and closing by adjusting the rotation of the screw rod.

Specifically, be equipped with the guide way on the blowout prevention piston, the guide way is parallel with the adjustment lead screw, and threaded connection has the anti-rotation bolt that corresponds with the guide way on the blowout preventer casing, and anti-rotation bolt grafting is in the guide way and with guide way sliding fit.

Specifically, a spacer ring is placed in the adjusting sleeve, the spacer ring abuts against the uppermost round packing, a middle guide sleeve is installed in the air bag shell, the middle guide sleeve is connected with the spacer ring through a spring, the upper end of the spring abuts against the middle guide sleeve, the lower end of the spring abuts against the spacer ring, and the polish rod penetrates through the middle guide sleeve, the spring and the spacer ring. The middle guide sleeve is used for righting the polish rod.

Specifically, be fixed with the air cock rather than the intercommunication on the annular gasbag, the air cock runs through gasbag casing lateral wall.

Specifically, an upper guide sleeve is fixed in the upper end of the air bag shell, and a polish rod penetrates through the upper guide sleeve.

Specifically, handles are fixed on the air bag shell, the upper connecting sleeve and the adjusting sleeve.

Specifically, the ball head portion internal fixation of adjustment sleeve has lower uide bushing, and the polished rod runs through lower uide bushing, and lower uide bushing is used for righting the polished rod, and a plurality of liquid tanks have been offered to lower uide bushing inner edge circumference equipartition. The lubricating liquid can lubricate the polish rod through the liquid passing groove.

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

1. the adjusting sleeve of the sealing device is connected with the lower connecting sleeve through the ball head part, has a aligning function, can realize the eccentric wear prevention of the polish rod, and prolongs the service life of the polish rod.

2. The lower end of the sealing device is provided with a blowout preventer body, and when the underground polished rod breaks, the blowout preventer pistons at the two sides can be closed by adjusting the screw rod to carry out airtight blowout prevention.

3. The sealing device is provided with a three-stage sealing device, the bottom blowout preventer body is sealed at the first stage, the conical packing and the circular packing at the middle part are sealed at the second stage, and the sealing packing in the annular air bag at the top is sealed at the third stage, so that leakage can be effectively prevented through multistage sealing.

4. The sealing device is provided with the two-stage energy storage device, the spring is used for storing energy at the first stage, the air bag is used for storing energy at the second stage, and when packing is worn, the two-stage energy storage device releases energy to continuously compress the packing, so that sealing timeliness is guaranteed. In addition, the air bag is provided with an air nozzle, so that inflation can be realized without stopping the machine.

5. The handle is fixed on the air bag shell, the upper connecting sleeve and the adjusting sleeve, so that the installation, the use and the maintenance are convenient.

Drawings

Fig. 1 is a cross-sectional view of the present utility model.

FIG. 2 is a schematic illustration of a blowout preventer piston.

Fig. 3 is a schematic view of an annular balloon.

Fig. 4 is a top view of the lower guide sleeve.

The names of the parts in the drawings are as follows:

1. blowout preventer housing

2. Plug head

3. Adjusting screw

4. Polished rod

5. Blowout prevention piston

6. Guide groove

7. Anti-rotation bolt

8. Gland

9. Adjusting sleeve

10. Conical packing

11. Upper connecting sleeve

12. Upper guide sleeve

13. Air bag shell

14. Annular air bag

15. Round packing

16. Air tap

17. Handle grip

18. Middle guide sleeve

19. Spring

20. Spacing ring

21. Lower connecting sleeve

22. Lower guide sleeve

23. Liquid passing trough

24. Sealing packing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, the energy storage type multistage sealing device comprises a blowout preventer body, wherein the blowout preventer body comprises a blowout preventer shell 1, and plugs 2 are connected to two ends of the blowout preventer shell 1 in a threaded manner. Blowout preventer shell 1 at two sides of polished rod 4 is equipped with blowout preventer piston 5, blowout preventer piston 5 corresponds with end cap 2. The plugs 2 are all connected with adjusting screw rods 3 in a threaded mode, and the adjusting screw rods 3 are connected with blowout prevention pistons 5 in a rotary mode. The blowout prevention piston 5 is provided with a guide groove 6, and the guide groove 6 is parallel to the adjusting screw 3. The blowout preventer shell 1 is connected with an anti-rotation bolt 7 corresponding to the guide groove 6 in a threaded manner, and the anti-rotation bolt 7 is inserted into the guide groove 6 and is in sliding fit with the guide groove 6.

The upper end of the blowout preventer body is fixed with a lower connecting sleeve 21, and the upper connecting sleeve 11 is fixed with a handle 17. The upper end of the lower connecting sleeve 21 is provided with a ball groove. The handle 17 is fixed on the adjusting sleeve 9, the ball head part is processed at the lower end of the adjusting sleeve 9, and the ball head part of the adjusting sleeve 9 is rotationally and hermetically connected in the ball groove. The lower connecting sleeve 21 is sleeved with a gland 8, the gland 8 is in threaded connection with the lower connecting sleeve 21, the gland 8 is in rotary connection with the ball head part of the adjusting sleeve 9, and the ball head part of the adjusting sleeve 9 is limited in the ball groove. The ball head part of the adjusting sleeve 9 can rotate in the ball groove of the lower connecting sleeve 21 in a sealing way, so that the adjusting sleeve 9 can swing along with the deflection of the polished rod 4, the eccentric wear prevention of the polished rod 4 can be realized, and the service life of the polished rod 4 is prolonged.

The ball head part of the adjusting sleeve 9 is internally fixed with a lower guide sleeve 22, the polish rod 4 penetrates through the lower guide sleeve 22, and a plurality of liquid passing grooves 23 are uniformly distributed on the circumference of the inner edge of the lower guide sleeve 22. The lubricating fluid can lubricate the optical rod 4 through the fluid passing groove 23.

The adjusting sleeve 9 above the bulb part is internally provided with a conical section and a straight section, the straight section is positioned above the conical section, a plurality of conical packing 10 are placed in the conical section of the adjusting sleeve 9, a plurality of round packing 15 are placed in the straight section, the conical packing 10 at the uppermost is tightly abutted to the round packing 15 at the lowermost, the air bag box body is arranged above the adjusting sleeve 9, the air bag shell 13 is fixedly and hermetically connected with the adjusting sleeve 9 through the upper connecting sleeve 11, and the round packing 15 at the uppermost is elastically connected with the air bag shell 13. The spacer ring 20 is arranged in the adjusting sleeve 9, the spacer ring 20 abuts against the uppermost round packing 15, the middle guide sleeve 18 is arranged in the air bag shell 13, the middle guide sleeve 18 is connected with the spacer ring 20 through the spring 19, the upper end of the spring 19 abuts against the middle guide sleeve 18, the lower end of the spring 19 abuts against the spacer ring 20, and the polish rod 4 penetrates through the middle guide sleeve 18, the spring 19 and the spacer ring 20.

The annular air bag 14 is fixed in the air bag shell 13, a plurality of sealing packing 24 are installed in the annular air bag 14, the air tap 16 communicated with the annular air bag 14 is fixed on the annular air bag 14, and the air tap 16 penetrates through the side wall of the air bag shell 13. The polished rod 4 sequentially penetrates a plurality of sealing packings 24, a circular packing 15, a conical packing 10 and a blowout preventer body.

A handle 17 is fixed to the airbag housing 13. An upper guide sleeve 12 is fixed in the upper end of the air bag shell 13, and the polish rod 4 penetrates through the upper guide sleeve 12. The upper guide sleeve 12 is used for righting the polish rod 4.

In the process of up-and-down movement of the polish rod 4, when the polish rod 4 is inclined, the ball head part of the adjusting sleeve 9 can rotate in the ball groove of the lower connecting sleeve 21 in a sealing way, so that the adjusting sleeve 9 can swing along with the deflection of the polish rod 4, the eccentric wear prevention of the polish rod 4 can be realized, and the service life of the polish rod 4 is prolonged. When the underground polished rod 4 breaks, the two side blowout prevention pistons 5 can be closed by adjusting the screw rod 3 to perform airtight blowout prevention. Through setting up spring 19, spring 19 can extrude circular packing 15 and toper packing 10 to after circular packing 15 and toper packing 10 wearing and tearing, can make circular packing 15 and toper packing 10 take place deformation under spring 19's elasticity effect, guarantee that circular packing 15 and toper packing 10 seal polished rod 4 all the time. The annular air bag 14 is inflated through the air tap 16, the sealing packing 24 inside the annular air bag 14 can be extruded after the annular air bag 14 is inflated, and when the sealing packing 24 is worn, the sealing packing 24 can be in sliding sealing connection with the polish rod 4 all the time under the pressure action of the annular air bag 14 on the sealing packing 24. When the polish rod 4 below the air bag shell 13 breaks, and the polish rod 4 in the air bag shell 13 is partially pulled out from the sealing packing 24, the sealing packing 24 is pressed tightly under the extrusion action of the annular air bag 14, so that the blowout prevention effect can be achieved.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides an energy storage formula multistage sealing device, including the preventer body, a serial communication port, preventer body upper end is fixed with down adapter sleeve (21), ball groove has been seted up to adapter sleeve (21) upper end down, bulb portion has been processed to adapter sleeve (9) lower extreme, the bulb portion rotation sealing connection of adapter sleeve (9) is in the ball groove, cover is equipped with gland (8) on adapter sleeve (21) down, gland (8) and adapter sleeve (21) threaded connection down, gland (8) are connected with the bulb portion rotation of adapter sleeve (9) and restrict the bulb portion of adapter sleeve (9) in the ball groove, cone section and straight section are processed in adapter sleeve (9) of bulb portion top, straight section is located cone section top, a plurality of toper packing (10) have been placed in the cone section of adapter sleeve (9), a plurality of circular packing (15) have been placed to straight section, the top toper packing (10) tightly support circular packing (15) of below, air bag (9) top is provided with the box body, air bag housing (13) and adapter sleeve (9) are connected with the ball portion rotation of ball portion of adapter sleeve (9) and limit in the ball groove, cone section and straight section are located cone section top, a plurality of toper packing (10) have, a plurality of toper packing (15) are placed in the cone section, a plurality of round packing (15) are placed in the cone section, annular packing (10) are placed in the cone section, annular packing (15) is tightly, a plurality of round packing (14) of round packing (13) and the top down, and the air bag (24) and seal connection in turn, and the air bag (13) are connected in turn, and sealed by the air bag (13) and sealed, and sealed by the air bag (13) A circular packing (15), a conical packing (10) and a blowout preventer body.

2. The energy storage type multistage sealing device according to claim 1, wherein the blowout preventer body comprises a blowout preventer shell (1), plugs (2) are connected to two ends of the blowout preventer shell (1) in a threaded mode, blowout prevention pistons (5) are arranged in the blowout preventer shell (1) on two sides of a polished rod (4), the blowout prevention pistons (5) correspond to the plugs (2), adjusting screw rods (3) are connected to the plugs (2) in a threaded mode, and the adjusting screw rods (3) are connected with the blowout prevention pistons (5) in a rotary mode.

3. The energy storage type multistage sealing device according to claim 2, wherein the blowout prevention piston (5) is provided with a guide groove (6), the guide groove (6) is parallel to the adjusting screw rod (3), an anti-rotation bolt (7) corresponding to the guide groove (6) is connected to the blowout preventer shell (1) in a threaded mode, and the anti-rotation bolt (7) is inserted into the guide groove (6) and is in sliding fit with the guide groove (6).

4. The energy storage type multistage sealing device according to claim 1, wherein a spacer ring (20) is placed in the adjusting sleeve (9), the spacer ring (20) abuts against the uppermost round packing (15), a middle guide sleeve (18) is installed in the air bag shell (13), the middle guide sleeve (18) is connected with the spacer ring (20) through a spring (19), the upper end of the spring (19) abuts against the middle guide sleeve (18), the lower end of the spring (19) abuts against the spacer ring (20), and the polish rod (4) penetrates through the middle guide sleeve (18), the spring (19) and the spacer ring (20).

5. The energy storage type multistage sealing device according to claim 1, wherein an air tap (16) communicated with the annular air bag (14) is fixed on the annular air bag, and the air tap (16) penetrates through the side wall of the air bag shell (13).

6. The energy storage type multistage sealing device according to claim 1, wherein an upper guide sleeve (12) is fixed in the upper end of the air bag shell (13), and the polish rod (4) penetrates through the upper guide sleeve (12).

7. An energy storage type multistage sealing device according to claim 1, wherein handles (17) are fixed on the air bag shell (13), the upper connecting sleeve (11) and the adjusting sleeve (9).

8. The energy storage type multistage sealing device according to claim 1, wherein a lower guide sleeve (22) is fixed in the ball head part of the adjusting sleeve (9), the polish rod (4) penetrates through the lower guide sleeve (22), and a plurality of liquid passing grooves (23) are uniformly distributed on the circumference of the inner edge of the lower guide sleeve (22).