Drill pipe drift assembly

Abstract

The invention discloses a drill pipe drift assembly. The drill pipe drift assembly comprises a circular tube-shaped drift body, a lifting lug fixedly connected to the top end of the drift body, a supporting base with an axial penetrating through hole, and a supporting step arranged at the middle section of the through hole of the supporting base and capable of supporting the drift body, wherein the inner cavity of the part above the supporting step is larger than the drift body; a top joint which can be connected with the bottom end of a drill pipe needing to be drifted is arranged at the top of the supporting base. When the circular tube-shaped drift is used for drifting, the drift body can be arranged in the through hole preformed in the supporting base; the through hole is formed in the drift and convenient for a fluid to pass through; the through hole projects towards the axis, namely the inner side, to form the supporting step capable of stopping the drift from passing through and functioning in supporting the drift; the supporting base is provided with the connection part connected with the bottom end of the drill pipe so that the drift is finally supported by the supporting base during drilling from top to bottom under the action of gravity, and therefore, the drift is protected and recovered.

Description

technical field [0001] The invention relates to a drift tool, in particular to a drill pipe drift gauge assembly. Background technique [0002] It is well known in the industry that in drilling operations, some operations require that each string of drill pipes must be drilled to ensure that the internal flow channels of all drill pipes downhole are not blocked. Such as drilling coring, liner operation, etc., after the drill pipe and liner are delivered to the position, they need to be thrown to achieve a certain purpose before subsequent operations can be carried out. [0003] These operations have a characteristic that they use the drill pipes in the previous drilling tool for operations. Therefore, it is necessary to study a new drift gauge that can be passed safely and quickly at one time during the tripping process before these operations. For all drill strings, the outer diameter of the drift gauge only needs to be slightly larger than the input ball. For example, it...

AI Technical Summary

Problems solved by technology

Since there are tools such as directional well and logging-while-drilling in the drilling operation, the use of the drift gauge will destroy the tool and cannot meet the drift requirements when the drill is pulled out after the drilling is completed. Therefore, it is necessary to add A matching support adapter protects the lower tool and also facilitates the recovery of the drift gauge

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