Magnetic fluid polished rod sealer for oil production in oilfield

Abstract

The invention provides a magnetofluid polished rod sealer used for oil production in an oil field, comprising a housing; the lower end of the housing is enclosed, the upper end is provided with gram and a gland bush and the gland bush is sheathed on the outside of a polished rod; particularly, a magnetic sleeve gasket is arranged in the housing, the inner ring surface of the magnetic sleeve gasket is provided with a fill area opposite to the polished rod and the fill area is filled with magnetofluid; the upper end and the lower end of the magnetic sleeve gasket are respectively provides with an upper sleeve gasket and a lower sleeve gasket. The invention completely solves the long-standing problems of high power consumption, vulnerableness, 'running', 'emitting', 'dropping' and 'leaking' of oil-gas-water and harm on safety and environment protection of the existing oil producing sealer and the like; the sealer can be widely used for sucker-rod pumping wells in the oil field.

Description

(1) Technical field: [0001] The invention relates to the field of oil production machinery and equipment, and relates to a magnetic fluid polished rod sealer for oil production in oil fields. (two) background technology: [0002] At present, the traditional oil pumping unit polished rod sealing devices widely used in various oil fields mainly include: single packing box sealer, double packing box sealer, single tower packing box sealer, double tower packing box sealer, spherical disc There are more than ten kinds of root box sealers and their cross-combined deformed products. The traditional rubber packing sealing device of the polished rod of the pumping unit is the most typical "O" shaped rubber ring packing box, and its structure is as follows: figure 1 shown. The structure of this kind of product is mainly composed of the following parts: 1. Gram; 2. "O" type rubber sealing ring; 3. Secondary sealing and pressing device; 4. Ball-type deflection adjustment device; 5. Sh...

AI Technical Summary

Problems solved by technology

[0004] During the oil production process of the pumping unit, whether it is an upstroke or a downstroke, the polished rod is always in the braking state held tightly by the rubber block packing, which increases the movement resistance and thus increases the energy consumption of the pumping unit

[0005] 2. Waste of resources

[0006] After the rubber block packing is worn out, there is a gap between it and the polished rod. As the service time prolongs, the gap continues to expand, and the oil, gas, and water in the oil well continue to emerge from the gap and spill into the air and the ground , wasting precious oil and gas resources

[0007] 3. Potential safety hazards

Therefore, packing leakage is a serious safety hazard in oil fields

[0009] 4. Destroying the environment

[0010] Crude oil and formation water leaked from the packing box flow to the ground, polluting the environment; if the oil well is in the farmland, it will cause the death of crops

[0011] 5. Damage to the polished rod

[0012] Because the polished rod is always in the state of mechanical compression and friction, the friction loss makes the polished rod change from thick to thin, and the fatigue stress causes cracks inside the polished rod. The double effect shortens the service life of the polished rod

[0013] 6. It is easy to cause partial friction of the sucker rod

[0014] Since the polished rod is always in a state of rigid compression, when it moves away from the central axis of the oil well, it will drive the sucker rod below (short to seven to eight hundred meters, long to two to three kilometers) to move away from the central axis of the oil well. , resulting in partial friction of the sucker rod, thereby increasing the power consumption of the pumping unit, and it is easy to wear the sucker rod, resulting in a broken rod accident

[0015] 7. The labor intensity of the workers is high

[0017] 8. The loss of production shutdown is large

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