Sidetrack well optional drilling-grinding-free well completion device and method

Abstract

The invention provides a sidetrack well optional drilling-grinding-free well completion device and method. The sidetrack well optional drilling-grinding-free well completion device comprises positioning centralizers and removable drilling-grinding-free windowing devices; the positioning centralizers are located in a shaft, the exact position of a sidetrack well section is positioned, and the shaftand a sleeve are centralized; the removable drilling-grinding-free windowing devices are located in the position, at a oil reservoir part needing windowing and sidetrack drilling, of the sleeve, whena windowing sidetrack well section needing to be branched is drilled, the removable drilling-grinding-free windowing devices are remotely controlled to be started, a sleeve section needing to be subjected to sidetrack drilling and windowing is directly opened, and the position, at the windowing part, of the sleeve does not need to be drilled and ground. According to the sidetrack well optional drilling-grinding-free well completion device and method, the sidetrack well drilling cost is greatly reduced, the well drilling efficiency is improved, the actual well drilling cycle of a sidetrack well and a sidetrack horizontal well is shortened, the investment efficiency and return rate are improved, the labor intensity of operators is relieved, the operation time is shortened, and the operationcost is reduced.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to an optional drilling-free completion device and method for sidetracking wells. Background technique [0002] At present, in fields such as oil and gas exploitation, sidetracking wells, including sidetracking lateral wells and multi-branch lateral wells, are highly developed and technically integrated sidetracking wells and horizontal wells, mainly aiming at increasing the contact area with oil layers as much as possible. , to release more oil and gas layer energy to enhance the ultimate recovery. At present, the drilling technology for sidetracking branch wells has been solved, but the integrated technology for well completion, sand control, and oil production and lifting has not yet matured. [0003] For window sidetracking, that is to put a steel-body slope inclined device into the proper position in the original wellbore. The inclined device is lowered into the w...

AI Technical Summary

Problems solved by technology

However, this process method is only used for sidetracking wells with 5-inch half-casing windows and supporting drilling tools for sidetracking wells with no cement sheath at the window point in sidetracking wells with window openings. Wellbore does not apply

[0007] To sum up, the traditional methods mainly focus on the sidetracking of the casing, ensuring the quality of the new wellbore of the sidetracking well, restoring the production of the old well, etc., but there is no efficient method for optional window-free drilling. Tools and Process Methods

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