Polish rod breakage sealing device special for polish rod sealer

Abstract

The utility model provides a polish rod breakage sealing device special for a polish rod sealer. The polish rod breaking and falling sealing device special for the polish rod sealer comprises a lower fixing pressing cap and an upper sealing pressing cap, the lower fixing pressing cap and the upper sealing pressing cap are symmetrically arranged up and down, and a main body is installed on the lower fixing pressing cap and the upper sealing pressing cap in a sealed mode through screw threads; a fixed blocking cap and a spring pressing cap are hermetically mounted on the outer walls of the two sides of the main body through screw threads respectively; the same polish rod is installed on the lower fixing pressing cap and the upper sealing pressing cap in a sealed and sliding mode, and the polish rod is matched with the lower fixing pressing cap and the upper sealing pressing cap. According to the polish rod breaking and falling sealing device special for the polish rod sealer, the problem of abrasion of the polish rod and the sealing flashboard caused by vertical reciprocating motion of the polish rod in the long-time production process can be avoided through contact of the rolling shaft and the polish rod, and meanwhile oil-water mixed objects carried by the polish rod can be prevented from entering the cavities in the two sides; therefore, the cavities on the two sides are kept clean and tidy.

Description

Technical Field

[0001] The utility model belongs to the technical field of polished rod breaking and sealing for polished rod sealers, in particular to a polished rod breaking and sealing device special for polished rod sealers. Background Art

[0002] At present, the oil rod pumping method is the most widely used crude oil lifting method in oil fields. During the long production process, due to the impact of the change in the up and down stroke load of the light rod, its own mechanical damage or mechanical wear damage and corrosion, the light rod may suddenly break off during the production process. If the light rod breaks off above the wellhead, the light rod will fall into the wellbore with the sucker rod. If the break off position is below the wellhead, the lower sucker rod will fall into the wellbore, and the upper light rod will also be pushed out of the wellhead under the action of pressure, thereby causing an oil blowout accident. The blowout accident not only causes resource loss, but also causes great pollution to the environment due to the leakage of crude oil. At the same time, it may also bring about greater safety accidents during the leakage process.

[0003] With the development of digital monitoring at well sites, well sites are often unmanned, especially at night. Once a polished rod breaks, the damage caused is immeasurable. Existing wellhead polished rod sealers do not have a polished rod breakage prevention and sealing function, so the wellhead polished rod cannot be effectively controlled immediately after it breaks.

[0004] Therefore, it is necessary to provide a new polished rod sealer special polished rod breaking and sealing device to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a polished rod breaking and sealing device specially designed for a polished rod sealer, which can utilize the contact between the roller and the polished rod to avoid the wear problem of the polished rod and the sealing gate caused by the up and down reciprocating motion of the polished rod during a long production process, and at the same time can prevent the oil-water mixture carried by the polished rod from entering the cavities on both sides, thereby keeping the cavities on both sides clean and tidy.

[0006] In order to solve the above technical problems, the utility model provides a polished rod sealer dedicated polished rod breaking sealing device comprising: a lower fixed pressure cap and an upper sealing pressure cap, the lower fixed pressure cap and the upper sealing pressure cap are symmetrically arranged in an upper and lower direction, and the lower fixed pressure cap and the upper sealing pressure cap are installed with a main body through a threaded seal;

[0007] The outer walls on both sides of the main body are respectively installed with a fixed stop cap and a spring pressure cap through threaded sealing;

[0008] The lower fixed pressure cap and the upper sealing pressure cap are sealed and slidably mounted with a same polished rod, and the polished rod is adapted to the lower fixed pressure cap and the upper sealing pressure cap;

[0009] A through groove is formed in the gap between the contact surfaces of the lower fixed pressure cap and the upper sealing pressure cap. A through hole is provided on the main body, and the through hole is communicated with the through groove.

[0010] As a further solution of the present invention, a sealing gate is slidably installed in the through hole, and the sealing gate passes through the through groove and is sealingly and slidably connected to the through groove.

[0011] As a further solution of the present invention, two bearings are installed on the outer walls on both sides of the sealing gate, and the two bearings are connected to the same roller, and the roller is adapted to the polished rod.

[0012] As a further solution of the present invention, a sealing groove 1 is provided on the lower fixed pressure cap and the upper sealing pressure cap, and the sealing groove 1 on the lower fixed pressure cap and the upper sealing pressure cap are both adapted to the main body.

[0013] As a further solution of the present invention, two sealing grooves are provided on the outer walls on both sides of the main body, and a fixed stop cap and a spring pressure cap are respectively provided on both sides of the main body. The sides of the fixed stop cap and the spring pressure cap close to each other extend into the two sealing grooves two and are adapted to the two sealing grooves two.

[0014] As a further solution of the present invention, a fixing groove is provided on the sealing gate plate, a spring is provided in the through hole, one end of the spring extends into the fixing groove and is connected to the inner wall of the fixing groove, and the other end of the spring is connected to the outer wall of the spring pressure cap.

[0015] Compared with the related art, the polished rod seal device provided by the utility model has the following beneficial effects:

[0016] 1. The utility model forms a plane seal based on the sealing gate, the upper sealing pressure cap with a seal, and the lower fixed pressure cap, and forms a combined seal between the lower fixed pressure cap, the sealing gate, and the upper sealing pressure cap, so that the oil-water mixture carried by the polished rod will not enter the cavities on both sides, thereby keeping the cavities on both sides clean;

[0017] 2. The utility model adopts the design of roller, which can utilize the contact between the roller and the polished rod to avoid the wear problem of the polished rod and the sealing gate caused by the up and down reciprocating motion of the polished rod during a long production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the assembly of the roller and bearing in the utility model.

[0022] In the figure: 1. Fixed stop cap; 2. Main body; 3. Lower fixed pressure cap; 4. Sealing gate; 5. Upper sealing pressure cap; 6. Polished rod; 7. Roller; 8. Bearing; 9. Spring; 10. Spring pressure cap. DETAILED DESCRIPTION

[0023] Please refer to Figure 1 、 Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ; Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ; Figure 3 This is a schematic diagram of the assembly of the roller and bearing in the present invention. The polished rod seal device for a polished rod seal comprises a lower fixed pressure cap 3 and an upper sealing pressure cap 5, which are symmetrically arranged vertically and are mounted to a main body 2 via a threaded seal.

[0024] The outer walls of both sides of the main body 2 are respectively installed with a fixed stop cap 1 and a spring pressure cap 10 through threaded sealing;

[0025] The lower fixed pressure cap 3 and the upper sealing pressure cap 5 are sealed and slidably mounted with a same polished rod 6, and the polished rod 6 is adapted to the lower fixed pressure cap 3 and the upper sealing pressure cap 5;

[0026] A through groove is formed in the gap between the contact surfaces of the lower fixed pressure cap 3 and the upper sealing pressure cap 5 . A through hole is provided on the main body 2 , and the through hole communicates with the through groove.

[0027] A sealing gate plate 4 is slidably installed in the through hole, and the sealing gate plate 4 passes through the through groove and is sealingly and slidably connected to the through groove.

[0028] Two bearings 8 are installed on the outer walls on both sides of the sealing gate plate 4. The two bearings 8 are connected to the same roller 7, and the roller 7 is adapted to the polished rod 6.

[0029] The lower fixed pressure cap 3 and the upper sealing pressure cap 5 are both provided with a sealing groove 1, and the sealing groove 1 on the lower fixed pressure cap 3 and the upper sealing pressure cap 5 are both adapted to the main body 2.

[0030] The outer walls on both sides of the main body 2 are provided with sealing grooves 2, and the two sides of the main body 2 are respectively provided with a fixed stop cap 1 and a spring pressure cap 10. The sides of the fixed stop cap 1 and the spring pressure cap 10 close to each other extend into the two sealing grooves 2 and are adapted to the two sealing grooves 2.

[0031] A fixing groove is provided on the sealing gate 4 , and a spring 9 is provided in the through hole. One end of the spring 9 extends into the fixing groove and is connected to the inner wall of the fixing groove, and the other end of the spring 9 is connected to the outer wall of the spring pressure cap 10 .

[0032] The sealing gate plate 4 forms a plane seal with the upper sealing pressure cap 5 with a seal and the lower fixed pressure cap 3, and a combined seal is formed among the lower fixed pressure cap 3, the sealing gate plate 4, and the upper sealing pressure cap 5. When the polished rod 6 moves, the oil-water mixture carried on it will not enter the cavities on both sides, thereby keeping the cavities on both sides clean. At the same time, by adopting the design of the roller 7, the contact between the roller 7 and the polished rod 6 can be used to avoid the wear problem of the polished rod 6 and the sealing gate plate 4 caused by the up and down reciprocating motion of the polished rod 6 during a long production process.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments or applied directly or indirectly without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A polished rod breaking and sealing device for a polished rod sealer, characterized in that: include: A lower fixed pressure cap and an upper sealing pressure cap, wherein the lower fixed pressure cap and the upper sealing pressure cap are symmetrically arranged in an upper and lower direction, and the lower fixed pressure cap and the upper sealing pressure cap are installed with the main body through threaded sealing; The outer walls on both sides of the main body are respectively installed with a fixed stop cap and a spring pressure cap through threaded sealing; The lower fixed pressure cap and the upper sealing pressure cap are sealed and slidably mounted with a same polished rod, and the polished rod is adapted to the lower fixed pressure cap and the upper sealing pressure cap; A through groove is formed in the gap between the contact surfaces of the lower fixed pressure cap and the upper sealing pressure cap. A through hole is provided on the main body, and the through hole is communicated with the through groove.

2. The polished rod breaking and sealing device for polished rod sealer according to claim 1, characterized in that: A sealing gate is slidably installed in the through hole, and the sealing gate passes through the through groove and is sealingly and slidably connected to the through groove.

3. The polished rod breaking and sealing device for polished rod sealer according to claim 2, characterized in that: Two bearings are installed on the outer walls on both sides of the sealing gate plate, and the two bearings are connected to the same roller, and the roller is adapted to the polished rod.

4. The polished rod breaking and sealing device for polished rod sealer according to claim 1, characterized in that: The lower fixed pressure cap and the upper sealing pressure cap are both provided with a sealing groove 1, and the sealing groove 1 on the lower fixed pressure cap and the upper sealing pressure cap are both adapted to the main body.

5. The polished rod breaking and sealing device for polished rod sealer according to claim 1, characterized in that: The outer walls on both sides of the main body are each provided with a sealing groove II, and a fixed stop cap and a spring pressure cap are respectively provided on both sides of the main body. The sides of the fixed stop cap and the spring pressure cap close to each other extend into the two sealing grooves II and are adapted to the two sealing grooves II.

6. The polished rod breaking and sealing device for polished rod sealer according to claim 3, characterized in that: A fixing groove is provided on the sealing gate plate, a spring is provided in the through hole, one end of the spring extends into the fixing groove and is connected to the inner wall of the fixing groove, and the other end of the spring is connected to the outer wall of the spring pressure cap.

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