Anti-scaling trinity oil well pump

Abstract

The invention relates to the technical field of tertiary oil recovery of oil fields, and belongs to an anti-scaling trinity oil well pump integrating a scale scraping function, a scale removing function and a scale preventing function into a whole. The problem that pump blocking is caused by the fact that the outer surface of a plunger and the inner surface of a pump barrel are scaled is solved. The anti-scaling trinity oil well pump is composed of a pump barrel (1), an oil outlet joint (2), an upper anti-scaling pup joint (3), an upper scale scraping ring (5), an upper scale inhibiting ring (6), an alloy plunger (8), a movable valve base (9), a movable valve ball (10), a lower anti-scaling pup joint (11), a lower scale inhibiting ring (13), a lower scale scraping ring (14), a fixed valve base (16) and a fixed valve ball (17). The anti-scaling trinity oil well pump is suitable for lifting a water flooding scaling well, a polymer flooding scaling well, a combined chemical flooding scaling well in an oil field and the like and has the advantages of being capable of preventing the condition that the pump detection period of the scaling well is prolonged due to the phenomenon that the pump is blocked by scales to the maximum limit and the like.

Description

technical field [0001] The invention relates to the technical field of oil field tertiary oil recovery, and belongs to a "trinity" anti-scaling oil well pump which integrates the functions of scraping, cleaning and anti-scaling. Background technique [0002] At present, there are two main anti-scaling card technologies for oil well pumps: one is to use the plunger to install the scraping ring to scrape the inner wall of the pump barrel; its disadvantage is that it does not have the functions of cleaning and anti-scaling, and the scraping ring scrapes The deposited scale cannot be removed in time, and it is easy to cause the pump to stop and jam; the other is to lift the plunger out of the pump barrel during the operation of the pump or when the pump is shut down to prevent scale and sand from blocking the pump. Its disadvantage is that it cannot scrape off the scale on the inner wall of the pump barrel in time, and the pumping of the plunger out of the pump barrel will cause...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two main anti-scaling card technologies for oil well pumps: one is to use the plunger to install the scraping ring to scrape the inner wall of the pump barrel; its disadvantage is that it does not have the functions of cleaning and anti-scaling, and the scraping ring scrapes The deposited scale cannot be removed in time, and it is easy to cause the pump to stop and jam; the other is to lift the plunger out of the pump barrel during the operation of the pump or when the pump is shut down to prevent scale and sand from blocking the pump.

Its disadvantage is that it cannot scrape off the scale on the inner wall of the pump barrel in time, and the pumping of the plunger out of the pump barrel will cause the pump efficiency to drop and the sucker rod string to vibrate.

Images