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

A sidetrack drilling, drilling and grinding technology, applied in the field of optional drilling and grinding-free completion devices for sidetrack drilling, can solve the problems of lack of an efficient tool and process method, inapplicability, etc., to improve development effect, reduce operation time and cost, the effect of improving drilling efficiency

CN111101858APending Publication Date: 2020-05-05CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-05-05

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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.
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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...

Examples

Embodiment Construction

[0042] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0043] At present, most of the sidetracking wells adopt the window sidetracking milling process, which is easy to damage the cement sheath and casing, which brings hidden dangers to later production, and shortens the service life of horizontal wells and sidetracking wells in severe cases. The task of the present invention is to provide an optional drilling and grinding-free completion tool and process for sidetracking wells, which are used for natural fracture reservoirs, heterogeneous strong oil and gas reservoirs, heavy oil reservoirs, fault block reservoirs, coalbed methane, etc. Oil and gas reservoirs suitable for multi-branch exploration and development, to achieve the goals of shortening the exploration and development cycle of different oil and g...