Paraffin control device and oil extraction paraffin control pipe column

Abstract

The invention discloses a paraffin control device and an oil extraction paraffin control pipe column. The paraffin control device comprises a heat transfer pipe and a circulating pump, wherein the heat transfer pipe comprises a spiral pipe and a heat insulation sleeve wrapping the outer wall of the middle of the spiral pipe, the spiral pipe is formed by folding and spirally winding a heat conduction pipe, the two parts, formed after folding, of the heat conduction pipe serve as a liquid inlet pipe and a liquid outlet pipe correspondingly, an inner cavity of the spiral pipe is filled with heat conduction liquid, the opening end of the liquid inlet pipe is connected with the liquid outlet end of the circulating pump, and the opening end of the liquid outlet pipe is connected with the liquid inlet end of the circulating pump. The paraffin control device can utilize terrestrial heat to increase the temperature of the shaft, fundamentally prevents wax precipitation of the shaft, is low in cost, does not pollute an oil layer, can realize continuous wax prevention, does not need regular well shut-in for wax removal, and ensures normal production of an oil well.

Description

technical field [0001] The invention relates to the technical field of oil production, in particular to an anti-wax device and an oil production anti-wax string. Background technique [0002] Gas lift oil production technology is widely used in major oil fields at home and abroad. It continuously injects natural gas into the oil pipe through the gas lift valve installed on the oil pipe, mixes with the liquid in the oil pipe, and reduces the density of the liquid column, so that the wellbore A method of oil production in which a column of liquid is lifted to the surface. However, for oil wells with high wax content in crude oil, because the injected gas aggravates the decrease in wellbore temperature, wax deposition is common in gas lift wells. The waxing of the tubing will lead to a decrease in production and a reduction in gas lift efficiency. In severe cases, the wax will block the tubing and fail to produce. [0003] At present, in view of the above-mentioned wax deposi...

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Problems solved by technology

However, these wax removal and prevention processes have some problems in the actual application process. Among them, the mechanical wax removal cycle is short and the wax removal cost is high; the thermal wax removal and well washing time is long, and the well washing fluid solution pollutes the oil layer; the mechanical wax removal and Thermal wax removal requires periodic well shut-in operations, affecting production; chemical wax removal is costly and has a corrosive effect on gas lift valves; electric heating wax removal is risky and expensive

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