Method for preventing drop and hoisting of single hanging ring

Abstract

The invention discloses a method for preventing drop and hoisting of a single hanging ring. The method comprises the steps that a, a drop preventing mechanism of a system for preventing drop and hoisting of the single hanging ring is opened and made to be in an unlocking state; b, when one of the hanging rings is mounted in the position, on one side of an elevator, of a lug hole of a lifting lug, an induction part of a drop preventing part sends a signal, after receiving the signal, a controller forbids moving of a runner wagon, the runner wagon is in a stop state, and after the hanging ring enters the lug hole, the drop preventing mechanism is in a locking state, and the hanging ring is blocked in the lug hole; and c, and the other hanging ring is mounted in the position, on the other side of the elevator, inside the lug hole of the lifting lug, the induction part of the drop preventing part sends a signal, and after receiving the signal, the controller allows the runner wagon to move. It can be effectively guaranteed that the two hanging rings both enter the lug hole, so that single hanging ring hoisting is avoided. Through the joint effect of the drop preventing mechanism and the drop preventing part, the hanging rings can be blocked firmly in the lug hole, slipping is avoided, the working stability and reliability of the elevator are improved, and the safety accident is eradicated.

Description

technical field [0001] The invention relates to the technical field of oil drilling equipment, in particular to an anti-off and anti-single ring hoisting method. Background technique [0002] In drilling engineering, an elevator is a tool used to lift pipes such as drill pipes, oil pipes and casings. It is hung in the lifting rings on both sides of the hook of the hoisting system, so as to lift out or run in the drilling tool, tubing and casing of the wellbore. [0003] During actual use, due to the influence of various factors such as the environment, the lifting ring is easy to slip out of the ear hole of the elevator, causing a major safety accident. In order to prevent the lifting ring from falling off from the ear hole of the elevator, the elevator is usually equipped with an anti-off device. The anti-off device in the prior art mostly adopts a bolt structure, and a longitudinal bolt hole is set at the lifting ear of the elevator, and the bolt is inserted into the bolt...

AI Technical Summary

Problems solved by technology

[0008] 1. Due to the integrated structure of the pedal, the limit boss and the ring stopper, the ring stopper is fixed in the boom of the main body of the elevator through the pin shaft. As the gap increases, the ring block is more likely to rotate, and the ring block cannot effectively block the ring, resulting in a reduction in the safety and reliability of the operation process

[0009] 2. When the traveling vehicle is hoisted, it is usually manually checked whether the lifting lugs on both sides of the elevator have been loaded into the lifting rings. Due to human negligence, it is easy to happen that one lifting ring has been installed in the lifting lugs, while the other side is not loaded or If it is not installed properly, the single lifting ring will be lifted directly, which will cause serious safety accidents. The safety of this method of anti-detachment elevator lifting is low

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