Sealing coupling for oil well mouth

Abstract

The utility model relates to the field of oil exploitation, in particular to a sealing coupler for an oil well mouth, which is mounted on an oil pipe and comprises a partition pipe inserted into the oil pipe, the upper end of the partition pipe is hermetically connected with the upper end of the oil pipe, and a first magnet assembly is slidably connected into the partition pipe. A first magnet assembly is slidably connected to the outer portion of the partition pipe, a second magnet assembly is slidably connected to the outer portion of the partition pipe, the first magnet assembly and the second magnet assembly attract each other and are clamped on the partition pipe, a first polish rod is fixedly connected to the first magnet assembly, and a second polish rod is fixedly connected to the second magnet assembly. The pumping unit has the effect of ensuring the working efficiency of the pumping unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil exploitation, in particular to a sealing coupling for oil well mouth. BACKGROUND

[0002] Oil exploitation refers to the behavior of excavating and extracting oil in places where oil is stored. In the process of oil exploitation, oil and gas flow from the reservoir to the bottom of the well, and then rise to the wellhead.

[0003] During oil exploration, after drilling is completed, a pumping unit is used for oil extraction work. The packing box is a sealing device for the polished rod of the wellhead of the pumping unit, which seals the annular space between the oil pipe and the polished rod during normal operation of the oil well. The packing is a rubber material filled in the packing box of the wellhead of the pumping unit, which seals oil, gas and water during the reciprocating movement of the polished rod of the pumping unit to prevent oil, gas and water from overflowing.

[0004] When the pumping unit is running, the polished rod and the packing rub against each other violently, and the packing is consumed, so it needs to be replaced or repaired in time. However, when replacing or repairing the packing, the pumping unit needs to be stopped until the pumping unit is low in work efficiency. CONTENT OF THE INVENTION

[0005] In order to ensure the work efficiency of the pumping unit, the present application provides a sealing coupling for oil well mouth.

[0006] The sealing coupling for oil well mouth provided by the present application adopts the following technical scheme:

[0007] A sealing coupling for oil well mouth is installed on an oil pipe, comprising a partition pipe inserted into the oil pipe, the upper end of the partition pipe is sealingly connected with the upper end of the oil pipe, a magnet assembly one is slidingly connected inside the partition pipe, a magnet assembly two is slidingly connected outside the partition pipe, the magnet assembly one and the magnet assembly two are attracted to each other and clamped on the partition pipe, a polished rod one is fixedly connected on the magnet assembly one, and a polished rod two is fixedly connected on the magnet assembly two.

[0008] By adopting the above technical scheme, the magnet assembly one and the magnet assembly two are arranged inside and outside the partition pipe respectively, and the relative fixation of the magnet assembly one and the magnet assembly two is realized by using the mutual attraction force therebetween, which not only can effectively reduce the occurrence of medium leakage in the oil pipe, but also can ensure that the polished rod one drives the magnet assembly, the magnet assembly two and the polished rod two to lift at the same time when the polished rod one lifts, thereby ensuring the smooth lifting of the polished rod of the pumping unit and improving the operation convenience while ensuring the reliability of the sealing performance. The packing does not need to be replaced during shutdown, thereby ensuring the work efficiency of the pumping unit.

[0009] Preferably, the second magnet assembly comprises a linkage tube sleeved with the outer sidewall of the partition tube, and the inner sidewall of the linkage tube is provided with a mounting groove in which a magnet block is mounted.

[0010] By adopting the above technical scheme, the magnet block is hidden inside the linkage tube, effectively reducing the risk of wear or corrosion of the magnet block caused by the external environment, further prolonging the service life of the device. When the second magnet assembly is lifted, the linkage tube slides along the outer sidewall of the partition tube, guiding the lifting of the linkage tube.

[0011] Preferably, the first magnet assembly comprises a protective cover and a plurality of magnet blocks vertically stacked inside the protective cover, and each two adjacent magnet blocks are attracted to each other.

[0012] By adopting the above technical scheme, the protective cover provides mounting space for the plurality of vertically stacked magnet blocks, and the attraction between each two adjacent magnet blocks ensures the stability of the relative position of each magnet block, thereby ensuring that the adhesion between the first magnet assembly and the second magnet assembly is more uniform and reliable. This design not only improves the working performance of the sealing coupling, but also facilitates maintenance and adjustment.

[0013] Preferably, the upper end of the protective cover is open, and a cover is fastened by screws to seal the opening.

[0014] By adopting the above technical scheme, the open upper end of the protective cover facilitates the installation and replacement of the magnet blocks, and the sealing of the opening by screwing the cover effectively reduces the entry of foreign matter into the protective cover, thereby ensuring the working stability of the magnet blocks. This design simplifies the assembly process while improving the overall reliability of the sealing coupling.

[0015] Preferably, the second magnet assembly comprises a plurality of magnet blocks vertically stacked in the mounting groove, each two adjacent magnet blocks are attracted to each other, and each magnet block is attracted to a corresponding magnet block.

[0016] By adopting the above technical scheme, the magnet blocks and the magnet blocks can achieve stable adhesion, ensuring that the first magnet assembly can smoothly drive the second magnet assembly to lift.

[0017] Preferably, the magnet blocks and the magnet blocks are O-shaped magnets, and each magnet block is sleeved outside the partition tube.

[0018] By adopting the technical scheme, the magnet block one and the magnet block two are designed as O-shaped magnets, and each magnet block is sleeved outside the separation pipe, which not only ensures that the attraction force between the magnet assembly one and the magnet assembly two is more evenly distributed, but also improves the stability during relative movement of the two. In addition, the design of the O-shaped magnet increases the attraction area between the magnet assembly one and the magnet assembly two, ensuring good guiding property.

[0019] Preferably, the protective cover, the linkage pipe and the separation pipe are all circular pipes.

[0020] By adopting the technical scheme, since the protective cover, the linkage pipe and the separation pipe are all designed as circular pipe structures, the symmetry and stability of the overall structure are ensured, the interference phenomenon during movement is further reduced, and the relative movement between the magnet assembly one and the magnet assembly two is more smooth. When the light rod one is accidentally rotated, the protective cover can be rotated under the action of the light rod one, the magnet block one drives the magnet block two to rotate, and the linkage pipe can be rotated around the separation pipe under the driving of the magnet block two. At this time, the light rod one can also smoothly drive the light rod two to ascend and descend.

[0021] Preferably, the upper end of the oil pipe is fixedly connected with a flange plate, and the upper end of the separation pipe is also fixedly connected with a flange plate, and the two flange plates are tightly connected with each other.

[0022] By adopting the technical scheme, reliable sealing connection between the oil pipe and the separation pipe is realized. Specifically, the setting of the flange plate enables the upper ends of the oil pipe and the separation pipe to be stably connected through mechanical fastening, effectively reducing the occurrence of fluid leakage, and facilitating installation and disassembly operations.

[0023] Preferably, the outer side of the separation pipe is fixedly connected with a magnetic protection cover, the magnet assembly one and the magnet assembly two are inside the magnetic protection cover, and the light rod two vertically penetrates the magnetic protection cover downward.

[0024] By adopting the technical scheme, the setting of the magnetic protection cover reduces the situation that parts susceptible to magnetic attraction are attracted to the coupling during transportation, storage or installation of the coupling.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. No need to stop and replace the packing, ensuring the working efficiency of the oil pumping unit;

[0027] 2. The magnet assembly one and the magnet assembly two are respectively arranged on the inner side and the outer side of the separation pipe, and are connected by magnetic force, which reduces the packing friction loss caused by traditional mechanical connection and reduces the maintenance frequency;

[0028] 3. The design of the O-shaped magnet increases the adsorption area between the magnet assembly one and the magnet assembly two, ensuring good guiding property. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a sectional view of the sealing coupling embodied by the embodiment of the present application.

[0030] Figure 2 is a structural schematic view of the magnet assembly one embodied by the embodiment of the present application.

[0031] Reference signs: 1, oil pipe; 2, partition pipe; 3, flange mechanism; 31, flange plate; 4, magnet assembly one; 41, protective cover; 42, magnet one; 43, cover; 5, magnet assembly two; 51, linkage pipe; 511, mounting groove; 52, magnet two; 6, light pole one; 7, light pole two; 8, anti-magnetic protective cover. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying Figures 1-2 The present application will be further described in detail.

[0033] The embodiment of the present application discloses a sealing coupling for oil well mouth. Referring to Figure 1 and Figure 2 which is used for being connected on the oil pipe 1, the sealing coupling comprises a partition pipe 2 which is inserted in the inside of the oil pipe 1, and the upper end of the partition pipe 2 is fixedly connected with a flange mechanism 3, and the flange mechanism 3 is used for sealingly connecting between the upper end of the oil pipe 1 and the upper end of the partition pipe 2.

[0034] The flange mechanism 3 comprises a flange plate 31 which is fixedly connected with the upper end of the partition pipe 2, and the upper end of the oil pipe 1 is also fixedly connected with the flange plate 31, and the two flange plates 31 are tightly adhered to each other and are tightly connected by screws.

[0035] The inner side wall of the partition pipe 2 is vertically and slidably connected with a magnet assembly one 4, and the outer side wall of the partition pipe 2 is vertically and slidably connected with a magnet assembly two 5, the magnet assembly one 4 is fixedly connected with a light pole one 6 which vertically and upwardly extends out of the partition pipe 2, and the magnet assembly two 5 is fixedly connected with a light pole two 7 which vertically and downwardly extends and is used for being connected with an oil pumping pump.

[0036] Referring to Figure 1 and Figure 2Magnet assembly one 4 includes protective cover 41 and a plurality of magnet pieces 42 stacked inside protective cover 41, and every two adjacent magnet pieces 42 are placed in a same-pole-opposite-pole manner. An upper end of protective cover 41 is provided with an opening, and a cover 43 is fastened and connected to the opening by screws, and cover 43 is used to seal the opening. A lower end of light pole one 6 vertically penetrates cover 43 and is fixedly connected to an inner bottom wall of protective cover 41. Magnet pieces 42 are O-shaped magnets, and the lower end of light pole one 6 is inserted into a middle part of each magnet piece 42. An outer side wall of each magnet piece 42 is tightly attached to an inner side wall of protective cover 41.

[0037] Magnet assembly two 5 includes a linkage pipe 51 sleeved on an outer side wall of separation pipe 2, and an inner side wall of linkage pipe 51 contacts the outer side wall of separation pipe 2. An annular mounting groove 511 is formed in the inner side wall of linkage pipe 51, and a plurality of magnet pieces 52 are arranged in mounting groove 511 and fixedly connected.

[0038] The plurality of magnet pieces 52 are vertically stacked, and every two adjacent magnet pieces 52 attract each other in a same-pole-opposite-pole manner. Magnet pieces 52 are also O-shaped magnets, and separation pipe 2 is inserted into a middle part of each magnet piece 52, and an inner side wall of magnet piece 52 contacts the outer side wall of separation pipe 2. One magnet piece 42 corresponds to one magnet piece 52, and magnet piece 42 and magnet piece 52 attract each other in a same-pole-opposite-pole manner.

[0039] Protective cover 41, linkage pipe 51 and separation pipe 2 are all circular pipes, so that when light pole one 6 is accidentally rotated, magnet assembly one 4 and magnet assembly two 5 can simultaneously rotate around separation pipe 2, and magnet assembly one 4 and magnet assembly two 5 can be smoothly lifted and lowered.

[0040] An outer side of separation pipe 2 is sleeved and fixedly connected with a magnet-proof protective cover 8, and magnet assembly one 4 and magnet assembly two 5 are both located inside magnet-proof protective cover 8, and linkage pipe 51 is also located inside magnet-proof protective cover 8, and a lower end of light pole two 7 vertically penetrates magnet-proof protective cover 8 downward.

[0041] The implementation principle of the sealing coupling for oil wellheads in the embodiment of the application is as follows: during operation, light pole one 6 is lifted and lowered by using a knocking machine or other power devices, and light pole one 6 lifting and lowering drives magnet assembly one 4 to lift and lower. Magnet assembly one 4 lifting and lowering along separation pipe 2 drives magnet assembly two 5 to lift and lower along separation pipe 2, and magnet assembly two 5 lifting and lowering drives light pole two 7 to lift and lower, and light pole two 7 lifting and lowering drives the oil pump to operate.

[0042] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A sealing coupling for oil wellheads, which is installed on a tubing (1), characterized in that: The utility model provides a kind of oil pipe, which comprises a partition pipe (2) inserted inside the oil pipe (1), the upper end of the partition pipe (2) is sealingly connected between the upper end of the oil pipe (1), the partition pipe (2) is slidably connected with a magnet assembly one (4) inside, the partition pipe (2) is slidably connected with a magnet assembly two (5) outside, the magnet assembly one and the magnet assembly two (5) are attracted to each other and clamped on the partition pipe (2), the magnet assembly one (4) is fixedly connected with a polished rod one (6), the magnet assembly two (5) is fixedly connected with a polished rod two (7).

2. A sealing coupling for oil wellheads according to claim 1, characterized in that: The magnet assembly two (5) comprises a linkage pipe (51) sleeved with the outer sidewall of the partition pipe (2), the inner sidewall of the linkage pipe (51) is provided with a mounting groove (511), and a magnet block is mounted in the mounting groove (511).

3. A sealing coupling for oil wellheads according to claim 2, characterized in that: The magnet assembly one (4) comprises a protective cover (41) and a plurality of magnet blocks (42) vertically stacked inside the protective cover (41), and each two adjacent magnet blocks (42) are attracted to each other.

4. A sealing coupling for oil wellheads according to claim 3, characterized in that: The upper end of the protective cover (41) is open, and a cover (43) sealing the opening is fastened by screws.

5. A sealing coupling for oil wellheads according to claim 3, characterized in that: The magnet assembly two (5) comprises a plurality of magnet blocks (52) vertically stacked in the mounting groove (511), and each two adjacent magnet blocks (52) are attracted to each other, and each magnet block (52) is attracted to a corresponding magnet block (42).

6. A sealing coupling for oil wellheads according to claim 3, characterized in that: The magnet blocks (42) and the magnet blocks (52) are both O-shaped magnets, and each magnet block (52) is sleeved outside the partition pipe (2).

7. A sealing coupling for oil wellheads according to claim 3, characterized in that: The protective cover (41), the linkage pipe (51) and the partition pipe (2) are all circular pipes.

8. A sealing coupling for oil wellheads according to claim 3, characterized in that: The upper end of the oil pipe (1) is fixedly connected with a flange (31), and the upper end of the partition pipe (2) is also fixedly connected with a flange (31), and the two flanges (31) are fastened to each other.

9. A sealing coupling for oil wellheads according to claim 1, characterized in that: The outer side of the partition pipe (2) is fixedly connected with a magnetism-proof protective cover (8), and the magnet assembly one (4) and the magnet assembly two (5) are both inside the magnetism-proof protective cover (8), and the polished rod two (7) vertically penetrates the magnetism-proof protective cover (8) downward.

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