Method and special device for automatically picking and suspending lifting rings

Abstract

The invention discloses a method and a special device for automatically picking and suspending lifting rings. The method comprises a lifting ring suspending procedure and a lifting ring picking procedure; when the lifting rings are required to be suspended, a large hook hooks a lifting lug, the special device for automatically picking and suspending the lifting rings is down passed to the position of an elevator at the wellhead, so that corresponding round holes in the lower ends of the two lifting rings mounted on rails of a framework through pulleys are flush with the elevator, the two lifting rings are located on two sides of the elevator, a hydraulic cylinder retracts, the lifting rings move inwards in parallel along the rails of the pulleys and are suspended to the elevator, and the lifting ring suspending procedure is completed; and when the lifting rings are required to be picked, the hydraulic cylinder is stretched out, the two lifting rings move outwards in parallel along the rails of the pulleys and are picked from the elevator, and the lifting ring picking procedure is completed. The device enables the lifting rings to perform relative motion, a mechanical arm is omitted, and the operation is simple; and when the lifting ring are suspended, the hydraulic cylinder has a mechanical lock function, the link that a pin is penetrated through the elevator is omitted, and simplicity and safety are realized.

Description

technical field [0001] The invention relates to a suspension ring in the mechanized operation of the petroleum industry, in particular to a method for automatically removing and hanging the suspension ring and a special device thereof. Background technique [0002] At present, in the mechanized workover operation, the link of automatically removing and hanging the lifting ring is to remove and hang the lifting ring through the mechanical arm. The specific operation process is as follows: when the lifting ring needs to be hung, the mechanical arm is extended to the position above the wellhead, and the arms are located on the lifting ring. On the outside, retract the arms inward, and hang the rings into the elevators. When the lifting ring needs to be removed, the mechanical arm stretches out to the position above the wellhead, the arms are located inside the lifting ring, and the arms expand outward to remove the lifting ring from the elevator. This mode of operation require...

AI Technical Summary

Problems solved by technology

This method of operation requires an additional mechanical arm to cooperate. The structure of the mechanical arm is complex, the cost is high, and the accuracy of the motion trajectory of the mechanical arm is high, which is prone to misoperation.

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