Wear-resisting centralizer structure of sucker rod of oil well

Abstract

The invention discloses a wear-resisting centralizer structure of a sucker rod of an oil well, and relates to a centralizer. A one-end sleeve ring (8) and a the-other-end sleeve ring (11) are arranged on a sucker rod (7) at an interval; the opposite faces of the one-end sleeve ring (8) and the the-other-end sleeve ring (11) are respectively provided with a convex ring (10); two ends of a centralizer tube (9) are fixedly connected onto the convex rings (10) of the one-end sleeve ring (8) and the the-other-end sleeve ring (11); the outer edge faces of the one-end sleeve ring (8), the the-other-end sleeve ring (11) and the centralizer tube (9) are in clearance fit with the inner wall of a sucker pipe (2). According to the wear-resisting centralizer structure, the one-end sleeve ring, the the-other-end sleeve ring and the centralizer tube are additionally arranged on the sucker rod, so that the sucker rod can obtain a maximum interval in the sucker pipe, the sleeve rings and the centralizer tube have both the isolation effect and the wear-resisting effect, and the service life of the sucker rod can be effectively prolonged.

Description

【Technical field】 [0001] The invention relates to a centralizer, in particular to a wear-resistant centralizer structure of an oil well sucker rod. 【Background technique】 [0002] As is known, the sucker rod plays a great role in oil production operations in the oil field. The length of a single sucker rod is usually between 6 and 8 meters, and the material is generally high-strength high-carbon steel with hard chrome plating on the surface. The sucker rods are connected one by one in the oil sucker pipe with threaded collars or plug-in centralizers "connecting pipe collars with a certain thickness" until they extend to the piston at the underground oil layer. 1,000 to 2,000 meters, and the deepest can reach more than 3,000 meters or more; when in use, the reciprocating motion of the sucker rod is used to achieve the purpose of pumping oil; in view of the working principle of the sucker rod, the sucker rod is a kind of fragile When the sucker rod reciprocates, the centraliz...

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Problems solved by technology

[0002] As is known, the sucker rod plays a great role in oil production operations in the oil field. The length of a single sucker rod is usually between 6 and 8 meters, and the material is generally high-strength high-carbon steel with hard chrome plating on the surface. The sucker rods are connected one by one in the oil sucker pipe with threaded collars or plug-in centralizers "connecting pipe collars with a certain thickness" until they extend to the piston at the underground oil layer. 1,000 to 2,000 meters, and the deepest can reach more than 3,000 meters or more; when in use, the reciprocating motion of the sucker rod is used to achieve the purpose of pumping oil; in view of the working principle of the sucker rod, the sucker rod is a kind of fragile When the sucker rod reciprocates, the centralizer of the sucker rod also rubs synchronously with the sucker pipe, so the wear problem of the sucker rod has always been a technical problem whether the sucker rod can be used for a long time; A close patent found that most of the existing centralizer structures stay on the sucker rod and add a wear-resistant sleeve structure to achieve the purpose of wear resistance. The biggest disadvantage of this wear-resistant method is that the centralizer cannot be made too large, so the pumping The inclination of the oil rod itself causes the wear of the centralizer, and the sucker rod will also wear the sucker pipe at the same time; according to domestic statistics on oil fields, the wear of the sucker pipe accounts for about 35% of the total maintenance amount of the oil field, and the maintenance cost is extremely high

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