关键词: 快速, 选材, 实施, 支撑键, 弹簧

Abstract: In the process of opening the sliding sleeve, such accidents as the tool string being twisted by slick line or the tool falling into the well may easily occur due to the high pressure difference between the inside and the outside of sliding sleeve. This will result in high external pressure rushing into the tubing and pushing the tool string up quickly the moment the sliding sleeve is opened. The existing anti-topping tools are connected to the top of the tool string and the function supporting anti-topping is lagged, so the anti-topping effect is not good. A kind of anti-topping device at the bottom of the tool string for opening the sliding sleeve is designed and developed. It can avoid thefunction lag of anti-topping device, reduce the probability of tool string being pushed up as a whole and prevent the occurrence of work accidents.

Key words: quick response, material selection, execution, supporting keys, spring