Oil well gas anchor

Abstract

The invention discloses an oil well gas anchor. An outer connection through groove is formed in the side surface at the upper part of an outer cylinder; an inner connection through groove is formed in the side surface of a tap; the tap is fixed inside the upper part of the outer cylinder; the inner connection through groove faces to the outer connection through groove; the upper part of the outer cylinder is connected with the lower part of an upper joint; the tap is internally provided with an oil outlet eccentric hole and an exhaust eccentric hole; the exhaust eccentric hole is communicated with the inner connection through groove and the outer connection through groove; a vent valve ball is placed in the exhaust eccentric hole; the upper end of an oil outlet pipe is installed in the exhaust eccentric hole of the tap, and the oil outlet pipe is integrally fixed with the tap and communicated with the inside of the upper joint through the exhaust eccentric hole, and is placed inside the outer cylinder; the lower part of a mixed liquid inlet pipe is mounted in an eccentric hole of a lower joint; the mixed liquid inlet pipe is communicated with the lower part of the lower joint, and is inserted in the outer cylinder; the upper part of the lower joint is connected with the lower part of the outer cylinder; the oil outlet pipe and the mixed liquid inlet pipe are placed inside the outer cylinder parallelly, so as to form an overflowing passage inside the outer cylinder; and the overflowing passage is communicated with the lower part of the oil outlet pipe and communicated with the upper part of the mixed liquid inlet pipe.

Description

technical field [0001] The invention relates to downhole equipment for oil well production in oil fields, in particular to a gas anchor for pumping wells. Background technique [0002] In the production wells of the oil field, some wells have a large gas content. When the oil pump is used to pump oil, the gas-liquid ratio entering the oil pump is large, reducing the well fluid displacement, the oil well production is low, and the pump efficiency is low. When the gas content exceeds a certain value , The oil pump will also have an air lock, causing the oil well to not produce oil. In order to reduce the impact of gas on the work of the oil well pump, the oil field often installs a gas anchor under the pump that uses slippage effect and gravity separation for simple separation to prevent gas from entering the pump. Oil wells with large gas volume have poor effect and cannot block and separate sand. Sometimes a multi-stage separation gas anchor is used on site. Although it ha...

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Problems solved by technology

[0002] In the production wells of the oil field, some wells have a large gas content. When the oil pump is used to pump oil, the gas-liquid ratio entering the oil pump will be large, reducing the well fluid displacement, the oil well production is low, and the pump efficiency is low. When the gas content exceeds a certain value , the oil pump will also produce air lock, resulting in no oil production in the oil well

In order to reduce the impact of gas on the work of the oil well pump, the oil field often installs a gas anchor under the pump that uses slippage effect and gravity separation for simple separation to prevent gas from entering the pump. Oil wells with large gas volume have poor effect and cannot block and separate sand

Sometimes a multi-stage separation gas anchor is used on site. Although it has a certain liquid-gas separation effect, the structure is complex and the production cost is high. It cannot block and separate sand, and cannot solve the impact of sand on oil pumping.

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