Injection-extraction integrated sand prevention oil-well pump

Abstract

The invention relates to an oil-well pump for sanding heavy crude oil well, and in particular relates to an injection-extraction integrated sand prevention oil-well pump. An adapter I of the device is provided with a connecting rod internally; a connecting rod adapter, a connecting rod, a collision pump short adapter, a collision pump nipple and a collision pump nipple lower adapter are connectedsequentially; the collision pump nipple lower adapter is connected with a steel wire rope sleeve adapter through a steel wire rope; the steel wire rope is wound on a pulley; the pulley is arranged ona pulley shaft; the pulley shaft is installed on a pulley seat; the steel wire rope sleeve adapter, an adapter nipple, a coupling, an air valve connecting rod ball body, a ball valve and an air valveconnecting rod are connected sequentially; a weight body metal is installed outside the air valve connecting rod ball body; and the air valve connecting rod is connected with an air valve spring seatring, a lower air valve ball valve and an air valve connecting section header. Through the oil-well pump provided by the invention, air injection, oil extraction and sand prevention are integrated into a whole, the working amount of borehole operation is reduced, and sand blocking and sand embedding are prevented effectively; and the defects that an air injection tubular column is required to be pulled out, then a pump is used for pumping and extracting oil in a rotation mode and the sand blocking and sand embedding in oil extracting process normally are overcome.

Description

Technical field: [0001] The invention relates to an oil pump used for sand producing heavy oil wells, in particular to an injection-production integrated sand control oil pump. Background technique: [0002] At present, steam injection thermal recovery is one of the main production methods for heavy oil wells. In the process of implementing steam injection thermal recovery in heavy oil wells on site, it is usually necessary to lower the steam injection string for gas injection. The well fluid cannot be directly pumped from the oil well, and the gas injection string must be pulled out before the pump can be pumped and pumped after the pressure is gone. This not only increases the workload and prolongs the construction cycle, but also misses the most favorable period for pumping and oil production. In turn, the oil layer is polluted and the production of the oil well is reduced. With the prolongation of heavy oil gas injection thermal recovery time, the sand production situat...

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Problems solved by technology

[0002] At present, steam injection thermal recovery is one of the main production methods for heavy oil wells. In the process of implementing steam injection thermal recovery in heavy oil wells on site, it is usually necessary to lower the steam injection string for gas injection. The well fluid cannot be directly pumped from the oil well, and the gas injection string must be pulled out before the pump can be pumped and pumped after the pressure is gone. This not only increases the workload and prolongs the construction cycle, but also misses the most favorable period for pumping and oil production. This in turn contaminates the reservoir and reduces well production

With the prolongation of heavy oil gas injection thermal recovery time, the sand production situation of oil wells is becoming more and more serious, and the sand content in crude oil is also increasing, which leads to frequent sand stuck and sand buried in oil pump during use, which greatly reduces the pumping capacity. The service life of the oil pump has a negative impact on its stable production and normal production

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