CN204941426U - Polished Rod Sealing Device - Google Patents

Abstract

The utility model provides a polished rod sealing device, include: the oil pumping well comprises an oil pumping well shaft, wherein an oil pumping well shaft packing (10) and an oil pumping polished rod are arranged in the oil pumping well shaft and sealed through the oil pumping well shaft packing (10); a valve is arranged in the oil pumping shaft and is arranged below an oil pumping shaft packing (10). The technical scheme of the utility model the problem that long, the degree of difficulty is big has been taken with the change of oil pumping pit shaft packing among the prior art with the oil pumping polished rod to have solved effectively.

Description

Polished Rod Sealing Device

technical field

The utility model relates to the technical field of oil field exploitation, in particular to a polished rod sealing device.

Background technique

In recent years, large-scale production of ultra-heavy oil in oilfields mainly relies on mechanical oil recovery. At present, rod pumping technology is mainly used. The oil pumping rod is an important part of mechanical oil recovery. The oil pumping rod packing is the key component to realize dynamic sealing when the oil pumping rod moves up and down. , the leakage of the packing box is getting more and more serious, and the replacement of the packing is becoming more and more frequent. In addition to the normal wear of the oil pumping packing, the continuous wear of the polished rod is the main reason for the leakage.

At present, the replacement of the inner packing of the oil suction packing box and the replacement of the oil suction polished rod mainly rely on the lower part of the grease injection packing box to be greased and sealed before operation. Each operation takes a long time, and the pressure of the ground hydraulic grease injection line is relatively high. Grease hoses are a safety risk.

Utility model content

The main purpose of the utility model is to provide a polished rod sealing device to solve the problem of time-consuming and difficult replacement of the oil pumping shaft packing and the oil pumping polished rod in the prior art.

In order to achieve the above object, according to the utility model, a polished rod sealing device is provided, comprising: an oil pumping shaft, an oil pumping shaft packing is arranged in the oil pumping shaft, an oil pumping polished rod, and the oil pumping polished rod is arranged in the oil pumping shaft and passes through The packing of the pumping well shaft realizes sealing; a valve is arranged in the pumping well shaft, the valve is arranged under the packing of the pumping well shaft, and the valve includes a first valve and a second valve located below the first valve.

Further, the first valve has a first valve seat and a first valve gate installed on the first valve seat, a first sealing groove is arranged on the first valve gate, and a sealing member is arranged in the first sealing groove.

Further, the first valve also includes a first shaft sleeve and a first screw rod, the first shaft sleeve and the first screw rod are installed in the first valve seat, the first valve gate is connected with the first shaft sleeve, and the first wire The first end of the rod is set in the first sleeve, and drives the movement of the first sleeve and the first valve gate through threads, and the second end of the first screw rod passes through the first valve seat and forms the first driving force. end.

Further, the first valve seat includes a first valve seat body and a first side plate connected to the first valve seat body in sequence, a first sleeve and a first pressure cap, and the first sleeve is passed through the first side plate Inside, the first screw rod is passed through the first sleeve and the first pressure cap, and a first bearing is also arranged between the first sleeve and the first screw rod.

Further, the second valve has a second valve seat and a second valve gate mounted on the second valve seat, the second valve also includes a grease injection structure, a second sealing groove is arranged on the second valve gate, and the second The sealing groove communicates with the grease injection structure.

Further, the second valve also includes a second shaft sleeve and a second screw rod, the second shaft sleeve and the second screw rod are installed on the second valve seat, the gate plate of the second valve is connected with the second shaft sleeve, and the second wire rod The first end of the rod is set in the second sleeve, and drives the movement of the second sleeve and the second valve gate through threads, and the second end of the second screw rod passes through the second valve seat and forms the second drive. end.

Further, the second valve includes a second valve seat body and a second side plate connected to the second valve seat body in sequence, a second sleeve and a second pressure cap, and the second sleeve is passed through the second side plate , the second screw rod is passed through the second sleeve and the second pressure cap, a second bearing is also arranged between the second sleeve and the second screw rod, and the second valve also includes a sleeve packing and a packing pressure Cover, the shaft sleeve packing is arranged between the second shaft sleeve and the second side plate, the packing gland is arranged between the second sleeve and the second shaft sleeve, and the packing gland is offset against the shaft sleeve packing.

Further, the oil pumping device also includes an oil wellbore packing box, the oil wellbore packing is arranged in the oil wellbore packing box, the lower end of the oil wellbore packing box is connected with the first valve seat, and the oil wellbore disk Air vents are arranged on the root box.

Further, the first valve seat body and the second valve seat body are integrally structured.

By applying the technical scheme of the utility model, the polished oil rod works in the wellbore, and the wellbore packing is used to seal the polished rod and the wellbore. When the pumping wellbore packing wears seriously, the oil pumping polished rod and the pumping wellbore packing cannot achieve a good sealing effect, and at this time it is necessary to replace the pumping wellbore packing. When replacing the pumping wellbore packing, close the valve set under the pumping wellbore packing, make sure that the valve is closed, that is, the upper and lower parts of the valve form a space that is not connected to each other, and then replace the pumping wellbore packing, the replacement of the pumping wellbore packing is complete, The oil pumping operation can be carried out. Of course, as those skilled in the art know, when the oil pumping rod wears seriously, the oil pumping rod is lifted up, and the coupling of the oil pumping rod enters the inner cavity of the lower joint of the oil pumping wellbore packing box. At this time, the valve is closed to realize sealing and replacement Oily rod. Normally, when replacing the pumping wellbore packing or the oil pumping polished rod, the first valve is closed, and after the first valve fails, the second valve is closed to replace or repair the first valve, and at the same time, the pumping wellbore packing and /or replace or repair the polished rod. By adopting the technical solution of the utility model, it is only necessary to close the valve to realize the replacement of the pumping well shaft packing or the oil pumping polished rod. The structure is simple and easy, and not only greatly saves the time for replacing the oil pumping well shaft packing or the oil pumping polished rod , and is safe and reliable. The above-mentioned multi-stage sealing structure further ensures the reliability of replacing the oil pumping wellbore packing or the oil pumping polished rod, and improves the efficiency and safety of the operation.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows a schematic structural view of an embodiment of a polished rod sealing device according to the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Oil pumping wellbore packing; 20. The first valve; 21. The first valve seat body; 22. The first valve gate; 23. The first bushing; 24. The first screw rod; 25. The first side plate ; 26, the first sleeve; 27, the first pressure cap; 30, the second valve; 31, the second valve seat body; 32, the second valve gate; 33, the second shaft sleeve; 34, the second screw rod 35, the second side plate; 36, the packing gland; 37, the second sleeve; 38, the second pressure cap; 39, the second bearing; 40, the grease injection structure;

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIG. 1 , the polished rod sealing device of this embodiment includes: an oil pumping well shaft and an oil pumping polished rod. The oil pumping well shaft packing 10 is arranged in the oil pumping well shaft. The oil pumping polished rod is arranged in the oil pumping well shaft and is sealed by the oil pumping well shaft packing 10 . Valves are arranged in the wellbore, and the valves are arranged under the packing 10 of the wellbore. The valves include a first valve 20 and a second valve 30 under the first valve 20 .

Applying the technical solution of this embodiment, the polished oil rod works in the wellbore, and the wellbore packing 10 is used to seal the polished rod and the wellbore. When the oil pumping wellbore packing 10 wears more seriously, the oil pumping polished rod and the oil pumping wellbore packing 10 cannot achieve a good sealing effect, and at this time the oil pumping wellbore packing 10 needs to be replaced. When replacing the oil pumping wellbore packing 10, close the valve arranged under the oil pumping wellbore packing 10, make sure that the valve is closed, that is, the upper and lower parts of the valve form a space that is not connected to each other, and then replace the oil pumping wellbore packing, the oil pumping wellbore packing 10 After the replacement, the pumping operation can be carried out. Of course, as those skilled in the art know, when the polished oil rod wears seriously, the polished oil rod is lifted up, and the polished oil rod coupling enters the inner cavity of the lower joint of the wellbore packing 10 box, at this time, the valve is closed to realize sealing. Replace the oil sucker rod. Normally, the first valve 20 is closed when replacing the oil pumping wellbore packing 10 or the oil pumping polished rod. After the first valve 20 fails, the second valve 30 is closed to replace or repair the first valve 20. Oil wellbore packing 10 and/or oil pumping polished rods are replaced or repaired. Adopting the technical scheme of this embodiment, only need to close the valve to realize the replacement of the pumping wellbore packing 10 or the oil pumping polished rod. Time, and safe and reliable. The above-mentioned multi-stage sealing structure further ensures the reliability of replacing the oil pumping wellbore packing 10 or the oil pumping polished rod, and improves the efficiency and safety of the operation.

As shown in Figure 1, in the technical solution of this embodiment, the first valve 20 has a first valve seat and a first valve gate 22 installed on the first valve seat, and the first valve gate 22 is provided with a first A sealing groove, a sealing element is arranged in the first sealing groove. The above-mentioned first valve 20 has a simple structure and is easy to operate. In this embodiment, the first valve gate 22 is provided with a front seal and a top seal.

Certainly, as those skilled in the art know, the sealing member may be made of elastic materials such as rubber and plastic.

As shown in Figure 1, in the technical solution of this embodiment, the first valve 20 also includes a first bushing 23 and a first screw rod 24, and the first bushing 23 and the first screw rod 24 are installed on the first valve seat Inside, the first valve gate 22 is connected with the first shaft sleeve 23, and the first end of the first screw rod 24 is arranged in the first shaft sleeve 23, and drives the first shaft sleeve 23 and the first valve gate through threads 22, the second end of the first screw rod 24 passes through the first valve seat and forms the first driving end. The above-mentioned structure is easy to operate, only need to rotate the first driving end, while the first driving end is rotating, the first screw rod 24 drives the first bushing 23 to move in the axial direction, and the first bushing 23 drives the shaft while moving in the axial direction. The first valve gate 22 moves, and the movement of the first valve gate 22 realizes the opening and closing of the first valve 20 . The design of the above structure is ingenious, that is, the driving member can realize the axial movement of the first valve gate 22 only in the case of rotating motion, thus ensuring that the driving end does not have axial displacement, and then it is easier to drive the first valve. The movement of the gate 22.

As shown in Figure 1, in the technical solution of this embodiment, the first valve seat includes a first valve seat body 21 and a first side plate 25 connected to the first valve seat body 21 in sequence, a first sleeve 26 and The first pressing cap 27, the first shaft sleeve 23 is passed through the first side plate 25, the first screw rod 24 is passed through the first sleeve 26 and the first pressing cap 27, the first sleeve 26 and the first A first bearing is also arranged between the screw rods 24 . Specifically, the first valve gate 22 is connected to the first shaft sleeve 23 through a T-shaped groove, the first side plate 25 is connected to the first valve seat body 21 through overload bolts, and the inner hole of the first side plate 25 is designed with a sealing groove. , installing a Yx-type sealing ring to realize the sealing between the first shaft sleeve 23 and the first side plate 25 . The first sleeve 26 and the first side plate 25 are connected by hexagon socket bolts, the first bearing is arranged between the first sleeve 26 and the first screw mandrel 24, and the first pressure cap 27 and the first sleeve 26 are connected by threads. .

As shown in Figure 1, in the technical solution of the present embodiment, the second valve 30 has a second valve seat and a second valve gate 32 installed on the second valve seat, and the second valve 30 also includes a grease injection structure 40 , the second valve shutter 32 is provided with a second sealing groove, and the second sealing groove communicates with the grease injection structure 40 . When the second valve 30 is closed, the grease injection structure 40 is used to realize the sealing of the second valve, and the above-mentioned valve structure is strong and durable. The setting of the second valve 30 ensures the replacement of the first valve 20 , the polished oil rod and the packing 10 of the wellbore under pressure.

As shown in Figure 1, in the technical solution of this embodiment, the second valve 30 also includes a second bushing 33 and a second screw rod 34, and the second bushing 33 and the second screw rod 34 are installed on the second valve seat Above, the second valve gate 32 is connected with the second shaft sleeve 33, and the first end of the second screw rod 34 is arranged in the second shaft sleeve 33, and drives the second shaft sleeve 33 and the second valve gate through threads 32, the second end of the second screw rod 34 passes through the second valve seat and forms a second driving end. The above structure is simple to operate, only need to rotate the second driving end, while the second driving end is rotating, the second screw rod 34 drives the second bushing 33 to move axially, and the second bushing 33 drives the shaft while moving in the axial direction. The second valve gate 32 moves, and when the second valve gate 32 moves to the closed state, sealing material is injected to realize the closing of the second valve 30 . The design of the above-mentioned structure is smart, that is, the driving member can realize the axial movement of the first valve shutter 22 under the condition of only rotating.

As shown in Figure 1, in the technical solution of this embodiment, the second valve 30 includes a second valve seat body 31 and a second side plate 35 connected to the second valve seat body 31 in sequence, a second sleeve 37 and a second valve seat body 31. The second pressing cap 38, the second shaft sleeve 33 is passed through the second side plate 35, the second screw rod 34 is passed through the second sleeve 37 and the second pressing cap 38, the second sleeve 37 and the second A second bearing 39 is also arranged between the screw rods 34 . The second valve also includes a bushing packing and a packing gland 36, the bushing packing is arranged between the second bushing 33 and the second side plate 35, and the packing gland 36 is arranged between the second sleeve 37 and the second side plate 35. Between the two axle sleeves 33, the packing gland 36 is offset against the packing of the axle sleeves. The structure of the second side plate 35, the second sleeve 37 and the second pressure cap 38 arranged in turn on the second valve seat body 31 ensures the reliability of the second valve 30, and the setting of the second bearing 39 ensures that the second thread While the rod 34 is reliably supported, the frictional force is reduced, thereby greatly reducing the wear of the second threaded rod 34 . Specifically, the second valve gate 32 is designed with a front seal and a top seal groove, and the front seal groove communicates with the top seal groove. The second valve gate 32 is connected to the second shaft sleeve 33 by a T-shaped groove. The second side plate 35 It is connected with the second valve seat body 31 through overload bolts. The second side plate 35 is designed with a stuffing box, and a high temperature resistant packing is installed in the stuffing box. By tightening the packing gland 36, the second side plate 35 and The seal between the second shaft sleeves 33, the second sleeve 37 and the second pressure cap are also connected to the outer side of the second side plate. The opening and closing method of the second valve gate 32 is the same as that of the first valve gate 22 . When the second valve gate 32 is closed, high temperature sealant is injected into the second valve 30 through the grease injection structure 40 . When the second valve shutter 32 is opened, the solid grease seal is automatically unsealed.

In the technical solution of this embodiment (not shown in the figure), the oil pumping device also includes an oil wellbore packing box 50, and the oil wellbore packing 10 is arranged in the oil wellbore packing box 50, and the oil wellbore The lower end of the packing box 50 is connected with the first valve seat, and the packing box 50 of the wellbore is provided with an air release hole. The above-mentioned structure further ensures the safety of replacing vulnerable parts such as the oil pumping shaft packing 10 and/or the oil pumping polished rod. When the pressure in the vent hole is high, it means that the valve has internal leakage and the above-mentioned vulnerable parts cannot be replaced. When the pressure in the vent hole can be relieved, the above-mentioned vulnerable parts can be replaced. Specifically, the pumping wellbore packing box 50 is a secondary pumping wellbore packing box.

As shown in FIG. 1 , in this embodiment, the first valve seat body 21 and the second valve seat body 31 are integrally structured. The integral structure of the first valve seat body 21 and the second valve seat body 31 can reduce the sealing structure of the first valve seat body 21 and the second valve seat body 31 , making the structure compact and saving cost.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. a polish rod seal device, comprising:

Oil pumping pit shaft, is provided with oil pumping pit shaft packing (10) in described oil pumping pit shaft,

Oil pumping polish rod, described oil pumping polish rod to be arranged in described oil pumping pit shaft and to realize sealing by described oil pumping pit shaft packing (10);

It is characterized in that,

Be provided with valve in described oil pumping pit shaft, described valve is arranged on described oil pumping pit shaft packing (10) below;

Described valve comprises the first valve (20) and is positioned at second valve (30) of described first valve (20) below.

2. polish rod seal device according to claim 1, it is characterized in that, described first valve (20) has the first valve seat and is arranged on the first valve flashboard (22) on described first valve seat, described first valve flashboard (22) is provided with the first seal groove, in described first seal groove, is provided with seal.

3. polish rod seal device according to claim 2, it is characterized in that, described first valve (20) also comprises the first axle sleeve (23) and the first screw mandrel (24), described first axle sleeve (23) and described first screw mandrel (24) are arranged in described first valve seat, described first valve flashboard (22) is connected with described first axle sleeve (23), the first end of described first screw mandrel (24) is arranged in described first axle sleeve (23), and the movement of described first axle sleeve (23) and described first valve flashboard (22) is driven by screw thread, second end of described first screw mandrel (24) passes described first valve seat and forms the first drive end.

4. polish rod seal device according to claim 3, it is characterized in that, described first valve seat comprises the first valve seat body (21) and is connected to the first side plate (25) on described first valve seat body (21) in turn, first sleeve (26) and the first pressure cap (27), described first axle sleeve (23) is located in described first side plate (25), described first screw mandrel (24) is located in described first sleeve (26) and described first pressure cap (27), also clutch shaft bearing is provided with between described first sleeve (26) and described first screw mandrel (24).

5. polish rod seal device according to claim 4, it is characterized in that, described second valve (30) has the second valve seat and is arranged on the second valve flashboard (32) on described second valve seat, described second valve (30) also comprises greasing structure (40), described second valve flashboard (32) is provided with the second seal groove, and described second seal groove is communicated with described greasing structure (40).

6. polish rod seal device according to claim 5, it is characterized in that, described second valve (30) also comprises the second axle sleeve (33) and the second screw mandrel (34), described second axle sleeve (33) and described second screw mandrel (34) are arranged in described second valve seat, described second valve flashboard (32) is connected with described second axle sleeve (33), the first end of described second screw mandrel (34) is arranged in described second axle sleeve (33), and the movement of described second axle sleeve (33) and described second valve flashboard (32) is driven by screw thread, second end of described second screw mandrel (34) passes described second valve seat and forms the second drive end.

7. polish rod seal device according to claim 6, it is characterized in that, described second valve (30) comprises the second valve seat body (31) and is connected to the second side plate (35) on described second valve seat body (31) in turn, second sleeve (37) and the second pressure cap (38), described second axle sleeve (33) is located in described second side plate (35), described second screw mandrel (34) is located in described second sleeve (37) and described second pressure cap (38), the second bearing (39) is also provided with between described second sleeve (37) and described second screw mandrel (34).

8. polish rod seal device according to claim 7, it is characterized in that, described second valve (30) also comprises axle sleeve packing and packing gland (36), described axle sleeve packing is arranged between described second axle sleeve (33) and described second side plate (35), described packing gland (36) is arranged between described second sleeve (37) and described second axle sleeve (33), and described packing gland (36) and described axle sleeve packing offset.

9. polish rod seal device according to claim 2, it is characterized in that, described oil rig also comprises oil pumping pit shaft packing box (50), described oil pumping pit shaft packing (10) is arranged in described oil pumping pit shaft packing box (50), the lower end of described oil pumping pit shaft packing box (50) is connected with described first valve seat, and described oil pumping pit shaft packing box (50) is provided with air vent.

10. polish rod seal device according to claim 6, is characterized in that, described first valve seat body (21) and described second valve seat body (31) are structure as a whole.