Anti-falling centering device for sucker rod

Abstract

The invention discloses an anti-falling centering device for a sucker rod. The sucker rod is connected with a universal device; a screw pump is connected with an anti-falling device through a screw pump connecting end; a connector is inserted between the universal device and the anti-falling device; and an anti-falling device spring assembly is arranged on the anti-falling device. In the anti-falling centering device for the sucker rod, the universal device and the anti-falling device are connected integrally through the connector; and the two ends of the whole are respectively arranged on the screw pump and the sucker rod. The anti-falling centering device for the sucker rod has the characteristics of preventing the screw pump from eccentricity and vibration, prolonging service life, shortening maintenance period and improving oil recovery, along with a stable and firm structure. The anti-falling centering device for the sucker rod is suitable to be used for connecting the screw pump and the sucker rod of oil pumping operation on an oilfield.

Description

technical field [0001] The invention proposes a drilling and oil production tool in the field of petroleum machinery. Specifically, it is a sucker rod detachment preventing centering device. Background technique [0002] Before the present invention was proposed, it was usually necessary to connect the detachment preventer with the sucker rod for screw pump oil production. In order to adapt to the deflection of the oil well, the universal device was installed on the sucker rod. Since the two parts are separately installed on the sucker rod Therefore, not only the installation is troublesome, but also the fastening and unification cannot be achieved, which is prone to failure and affects the oil recovery operation. [0003] The current sucker rod is connected with the screw pump in the following ways: 1. The screw pump is directly connected with the sucker rod. The disadvantage is that when the oil well deviates, the sucker rod is easily stuck and cannot rotate; 2. The scre...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the oil well deviates, the sucker rod is easily stuck and cannot rotate; 2. The screw pump is connected with the anti-loosening device, and then connected with the sucker rod. Since there is no universal device, when the oil well is eccentric, The wall of the well blocks the rotation of the sucker rod, which also causes the sucker rod to be stuck in the oil well; 3. The screw pump is connected to the anti-loosening device, and the anti-loosening device is connected to the sucker rod, and the universal device is connected to the sucker rod, so that Although the connection can adapt to off-well oil production operations, since the anti-loosening device and the universal device are connected through the sucker rod, it is easy to cause the screw pump to swing during the rotation process, and cause excessive wear of the connected screw pump rotor , reduce the service life of the screw pump

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