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Variable diameter drill and mill for oil and gas wells

An oil and gas well, drilling and milling technology, which is applied in the field of variable diameter drilling and milling machines for oil and gas wells, can solve problems such as the inability of the drill bit to accurately find the target wellbore, the high downhole safety risk, the downhole accident and the accident, etc., so as to achieve safe downhole engineering goals, The effect of reducing downhole complications and accidents and increasing success rates

Active Publication Date: 2022-05-06
南智(重庆)能源技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional milling cones have a lower success rate of less than 20% in sidetracking of window openings
In a multi-bottom cluster well, a single conventional drill bit cannot accurately find the target wellbore, resulting in long non-production time, high costs, and high downhole safety risks, often leading to downhole casing accidents

Method used

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  • Variable diameter drill and mill for oil and gas wells
  • Variable diameter drill and mill for oil and gas wells

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0023] Such as figure 1 and figure 2 As shown, a variable-diameter drilling and milling device for oil and gas wells mainly includes a drilling and milling device main body 1 composed of a lower mounting cylinder 11 and an upper driving cylinder 12, both of which have a cylindrical structure. Therefore, the drill-mill main body 1 also has a cylindrical structure. Moreover, the upper drive cylinder 12 is arranged on the top of the lower installation cylinder 11, and can move up and down along the lower installation cylinder 11. A diameter-changing mechanism installation cavity is formed between the lower installation cylinder 11 and the upper drive cylinder 12. There is a variable diameter drilling and milling mechanism. The variable diameter drilling and milling mechanism includes a core body 2 installed on the lower installation cylinder 11 and a number o...

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Abstract

The invention discloses a variable-diameter drilling and milling device for oil and gas wells, which comprises a drilling and milling device main body composed of a lower installation cylinder and an upper driving cylinder. and can move up and down along the lower installation cylinder. A diameter-reducing mechanism installation chamber is formed between the lower installation cylinder and the upper drive cylinder, and a diameter-reduction drilling and milling mechanism is arranged in the diameter-reduction mechanism installation chamber. Using the above technical solutions, the diameter can be changed according to different borehole sizes or casing sizes; it can not only drill wells, but also forge and mill, improve the ROP, and at the same time repair the deformed or collapsed sections of the borehole to ensure the quality of the borehole and greatly reduce the The downhole complexity and accidents are eliminated; the variable diameter drill washer is used in the sidetracking of the window, which greatly improves the success rate of the sidetracking of the window; when dealing with the complicated downhole conditions of the open hole and the production well, it can perform multiple operations at one time , Greatly improve operating efficiency and reduce the risk of accidents.

Description

technical field [0001] The invention relates to the technical field of oil and gas well operation machinery, in particular to a variable diameter drilling and milling device for oil and gas wells. Background technique [0002] Existing conventional drill bits are of fixed diameter, and conventional milling cones are also of standard fixed size. The scope of application of both is the size of conventional boreholes. Not only the scope of application is limited, the efficiency of drilling and milling is low, but also it cannot adapt to the processing of complex downhole conditions. and handling of underground accidents. [0003] Specifically, since the borehole size of existing oil and gas wells has been standardized, conventional drill bits cannot meet the drilling requirements of current horizontal wells, cluster wells, and lateral wells. Window sidetracking is also a commonly used drilling method. The success rate is very low, less than 30% at one time, by using the curren...

Claims

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Application Information

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IPC IPC(8): E21B29/00E21B29/06E21B21/00
CPCE21B29/00E21B29/06E21B21/00
Inventor 黄有为
Owner 南智(重庆)能源技术有限公司
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