A kind of oil field pumping unit inlet sealing device

Abstract

The invention relates to the technical field of oilfield pumping units, in particular to an oilfield pumping unit inlet sealing device, comprising a casing and a gland, the outer top of the casing is screwed with a gland, and the inner side of the top of the gland is fixed A pressure ring is connected, a communication hole is opened on the inner side of the circumference of the pressure ring, and a reclaiming device is screwed on the inner side of the casing. The reclaiming device includes a first drum, a second drum, and a first sealing ring. , the second sealing ring, the conducting hole and the operating hole, in the present invention, through the first rotating drum, the second rotating drum, the first sealing ring, the conducting hole and the operating hole, the first rotating drum and the second rotating drum The cylinder can take out the spiral packing from the inside of the casing, and then separate the first rotating cylinder from the second rotating cylinder, so that the debris inside the first rotating cylinder and the second rotating cylinder can be completely cleaned, so as to ensure the first rotating cylinder. There will be no residual debris on the inner side of the first drum and the second drum, which may not affect the sealing performance of the newly placed spiral packing.

Description

technical field [0001] The invention relates to the technical field of oil field pumping units, in particular to an inlet sealing device for oil field oil pumping units. Background technique [0002] The pumping unit is a kind of machinery and equipment for oil extraction, commonly known as "kowtow machine". The oil is discharged from the well by means of pressurization. When the pumping unit is on the stroke, the tubing elastically contracts and moves upwards, which drives the mechanical unblocking oil extractor to move upwards. The sliding sleeve vibrates; at the same time, the positive check valve is closed, and the reducing piston assembly blocks the oil. When the pumping unit downstrokes, the oil pipe elastically elongates and moves downward, which drives the mechanical unblocking oil extractor to move downward, and the impact slides. The sleeve vibrates; at the same time, the reverse check valve is partially closed, and the reducing piston assembly still blocks the ann...

AI Technical Summary

Problems solved by technology

[0003] At present, during the long-term oil pumping production and wear process of the pumping unit packing box in various oil field oil production plants, debris will fall from the spiral packing inside the packing box, and the debris will cause friction on the polished rod. It will make the surface of the polished rod no longer smooth, and make the lubrication effect of the polished rod worse, which will easily cause the surface temperature of the polished rod to rise, and the general packing box is not convenient to take out the residue at the bottom of the packing box when replacing the spiral packing. If the residue is taken out If it is not thorough, the sealing effect will not be very good after replacing the new spiral packing. Therefore, in view of the above problems, a sealing device for the inlet of the oil field pumping unit is proposed.

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