Completion string running tool

Abstract

The invention relates to a setting tool for a well completion pipe string, which is applied to setting construction of the well completion pipe string for petroleum and natural gas drilling. A fixed guide mandrel is connected at the lower end of an upper joint; a guide spiral groove is processed on the outer surface of the fixed guide mandrel; a sliding sleeve is sheathed on the outer wall of the fixed guide mandrel; a sliding pin is fixedly arranged on the wall of the sliding sleeve, and the inner end of the sliding pin is arranged in the guide spiral groove; a rotating cylinder is connected at the lower end of the sliding sleeve, and the rotating cylinder is sheathed on the outer wall of the fixed guide mandrel; a shearing pin is fixedly arranged on the rotating cylinder; the shearing pin is used for fixing the rotating cylinder on the outer wall of the fixed guide mandrel; and the lower end of the rotating cylinder is in threaded connection with a casing shoe with a cutting edge. The setting tool has the effects that: the structure of the casing shoe is spirally lifted and connected at the lower end of the well completion pipe string, and the well completion pipe string is lifted upwards and set downwards, so that the whole well completion pipe string does not need to be rotated when an obstacle is met during setting of the pipe string, the obstacle can be completely cleared, and the pipe string can be set to the design position.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas drilling, in particular to a special tool for connecting a well completion pipe string when running in, and is a special tool connected to the lower end of the well completion pipe string so that the well completion pipe string can be run smoothly. Background technique [0002] With the continuous deepening of exploration and development, the number of deep wells, ultra-deep wells, horizontal wells, and extended-reach wells is increasing, and the depth of completion strings (such as casing and screen pipes, etc.) is getting deeper and deeper. The drilling trajectory of the string is becoming more and more complicated, and obstacles often occur during the running process, which puts forward higher and higher requirements for the completion string. [0003] The conventional solution to run-in obstruction of the completion string is to rotate the completion string, lift up and down ...

AI Technical Summary

Problems solved by technology

However, when the completion string of a long-reach and complex well is lowered, once the completion string encounters resistance during lowering, the wellbore friction is relatively large, and it is difficult to rotate the entire completion string

Sometimes it is possible to damage complex completion strings (e.g. complex screens) even if the completion string can be rotated

Therefore, it is difficult to solve the blockage problem of the completion string running in long-reach and complex wells with conventional solutions

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