Method and tool for putting well completion pipe down by utilizing drill rod

Abstract

The invention relates to a method for putting a well completion pipe down by utilizing a drill rod. The method is suitable for a petroleum natural gas field, in which the well completion pipe is put into a drill well via the drill rod. The method comprises the steps as follows: a whole well completion pipe string is connected and put into a drill well, wherein during the process of putting the well completion pipe string into the drill well, when a sleeve suspender, a well completion sleeve and a well completion pipe putting-down tool at the lower part of a rotary pup joint begin to rotate, the rotary pup joint is in an original state, and the drill rod can rotate relative to the well completion pipe. When the lower parts of the well completion sleeve and the well completion pipe putting-down tool are blocked by obstacles, the obstacles can be cut by repeatedly lifting the drill rod up and putting the drill rod down. Next, the sleeve suspender is hung on the inner wall of the upper layer of the sleeve. The operation of the sleeve suspender without hands can be realized by rotating the drill rod, and the construction that the well completion pipe is put down via the drill rod can be realized by lifting the drill rod up and rotating the pup joint. The method has the effects as follows: during the process of putting the well completion pipe string into the drill well, the drill rod can rotate freely relative to the well completion pipe, and the well completion pipe which only bears the pressing-down force can not rotate, so that the influence on the putting-down force of the well completion pipe caused by the frictional resistance of a well bore is reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a well completion downhole tool and a well completion method, in particular to a method and a tool for lowering a well completion string with a drill pipe. Background technique [0002] At present, 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 running depth of pipe strings (such as liners and screen pipes, etc.) is increasing. The trajectory of running into the wellbore is becoming more and more complicated, and higher and higher requirements are put forward for the technology of running the pipe string. [0003] The conventional solution to run-in obstruction of the completion string is to rotate the string, lift and lower the string, and establish drilling fluid circulation at the same time. This method can effectively solve the problem of ...

AI Technical Summary

Problems solved by technology

However, when running complex completion strings in complex wells such as extended reach, once the completion string encounters resistance, it is difficult to rotate the entire string due to the high borehole friction.

Especially in complex wells such as extended reach wells, when the wellbore friction is high, the hook load may be zero, and the completion string has no running force

Therefore, it is difficult to solve the problem of obstruction in running complex completion strings in complex wells such as long-reach wells with conventional solutions

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