Guide rail type deflection proof extension rod centralizer

Abstract

It relates to a kind of guide orbital righting guard against deviation soldered rod. It is formed by the soldered rod with the righting guard bound to it. At the surface of the middle of the soldered rod is a W shape guide orbital groove joint with a ring. In the inner wall of the righting guard are bearing balls, which cooperate with W-shape guide orbital groove. The outer wall of the righting guard is equipped with oil groove. The upper and lower ends of the W-shape groove of the guide orbital groove is linked with a sand removing groove, which expel the oil layer sand to avoid the righting guard block from being got stuck, and to prevent it from deviation tear and wear. The friction between the righting guard block and oil pipe wall winds around the soldered rod in relation to oil tube winding around oil pumping rod. The even friction of the outer brim of the righting guard block prevents the righting guard block from deviation tear and wear. The friction between the righting guard block and oil pipe wall winds around the soldered rod in relation to oil pipe winding around the oil-pumping rod. The even friction in the outer brim of the righting guard blocks prevents it from deviation tear and wear. The even tear and wear of the righting guard prolongs the cycle period for repairing the well. The loss of the tear and wear of the oil pipes and oil-pumping rod to the minimum can save expenses for repairing the well and minimize the cost for oil drilling.

Description

technical field [0001] The invention belongs to a connection device between oil well pumping rods, in particular to a guide rail type anti-deviation connecting rod centralizer. Background technique [0002] At present, the sucker rod in the inclined well of the oil field moves up and down in the oil pipe to produce friction, which causes the existing eccentric wear, damages the oil pipe and the sucker rod, causes the oil pipe to wear and leak, and the sucker rod joint is severely worn, causing the sucker rod to fall off. Resulting in shutdown of the oil well, thus shortening the workover period. At the same time, due to the damage of oil pipes and sucker rods, the number of discarded oil pipes and oil rods increases, which increases the cost of workover. The currently used centralizers, because the centralizing block has a free stroke and there is no sand discharge tank, if sand from the oil layer enters the free stroke, the centralizing block will be stuck, unable to rotat...

AI Technical Summary

Problems solved by technology

[0002] At present, the sucker rod in the inclined well of the oil field moves up and down in the oil pipe to produce friction, which causes the existing eccentric wear, damages the oil pipe and the sucker rod, causes the oil pipe to wear and leak, and the sucker rod joint is severely worn, causing the sucker rod to fall off. Cause oil wells to shut down, thus shortening the workover cycle

At the same time, due to the damage of oil pipes and sucker rods, the number of scrapped oil pipes and oil rods increases, which increases the cost of workover

The currently used centralizer, since the centralizing block has a free stroke, and there is no sand discharge tank, if sand from the oil layer enters the free stroke, the centralizing block will be stuck, unable to rotate and cause eccentric wear, and cannot effectively exert the force on the centralizing block. The role of each wear surface reduces the service life, increases the number of workovers, and affects production

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