Intelligent hydraulic wellhead sealer

Abstract

The invention discloses an intelligent hydraulic wellhead sealer, which comprises a polish rod, wherein the middle of the polish rod is sleeved with a paraffin removal valve; the polish rod is provided with a plurality of sealing rings; and the sealing rings are sleeved on the polish rod. The intelligent hydraulic wellhead sealer is simple in structure, convenient to assemble and disassemble, good in sealing property and long in service cycle; eccentric wear of the polish rod can be prevented, an oil passage can be automatically sealed when the polish rod is broken to realize a function of preventing blowout; the working performance is high, the environmental pollution to a working site is reduced, the cost is reduced, and the product is economical, intelligent, practical and environment-friendly; the rear end of the polish rod is sleeved with an air isolating tube, and when the polish rod works to a lower dead center, underground waste gas is timely discharged out of an inner cavity of the intelligent hydraulic wellhead sealer, and the inner cavity of the intelligent hydraulic wellhead sealer releases pressure to reduce the friction between the polish rod and the sealing rings, so that the service life of each sealing ring is more than one year, related parts are not required to be replaced, the cost is saved by 80 percent, an operating area is pollution-free, the environment reaches the standard, electricity is saved by 7-8KW / H daily compared with that of a single well, and the intelligent hydraulic wellhead sealer is convenient to promote and use.

Description

technical field [0001] The invention relates to a wellhead sealer, in particular to an intelligent hydraulic wellhead sealer, which belongs to the wellhead equipment used for petroleum exploitation. Background technique [0002] Due to the up and down reciprocating movements of pumping units and pumps, 3,153,600 times of up and down reciprocating movements are required each year, and a heat-resistant, corrosion-resistant, and wear-resistant material is required to seal between the wellhead polished rods. In the past, the conventional sealing material was butter packing. Seals and mechanical seals, none of the above materials can solve the problem of long-term seal wear resistance. After a period of use, gas, oil, and water will leak out of the ground and pollute the environment, causing oil production workers to constantly adjust, tighten, and clean the wellhead. The currently used hydraulic polished rod sealer is equipped with an inner hole, smooth packing, and tapered pack...

AI Technical Summary

Problems solved by technology

[0002] Due to the up and down reciprocating movements of pumping units and oil pumps, 3,153,600 times of up and down reciprocating movements are required every year, and a heat-resistant, corrosion-resistant, and wear-resistant material is required to seal between the wellhead polished rods. In the past, the conventional sealing material was butter packing. Seal and mechanical seal, none of the above materials can solve the problem of long-term seal wear resistance. After a period of use, gas, oil, and water will leak out of the ground and pollute the environment, causing oil production workers to constantly adjust, tighten, and clean the wellhead

The currently used hydraulic polished rod sealer is equipped with an inner hole, smooth packing, and tapered packing, and is installed in the connecting barrel of the plunger. The disadvantage is that it cannot discharge the pressure of the downhole exhaust gas, which increases the load of the pumping unit The exhaust gas pressure pulse wave and the inner cavity seal form a positive pressure, which makes it lose the sealing effect of each seal. In addition, the centering performance is poor, resulting in the phenomenon that the eccentric wear of the polished rod cannot be automatically centered, resulting in frequent replacement of the packing and related components. , dismantling is inconvenient to operate, oil leakage, gas leakage and water leakage on site cause serious pollution, and the operation efficiency is low, which increases the cost and reduces the oil production.

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