Tubular column

A technology of pipe string and drill pipe, which is applied in the field of petroleum downhole tools, can solve the problems of long well construction period, high well construction cost, and long well construction period, and achieve the effect of shortening well construction period and reducing well construction cost

Inactive Publication Date: 2017-07-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the existing technology, multi-branch wells mean a longer well construction period. At the same time, due to drilling more formations, they face greater construction risks. The more branches, the longer the well construction period and the greater the risk. The higher the cost

Method used

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  • Tubular column
  • Tubular column
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing.

[0025] The particulars presented here are exemplary and used for illustrative discussion of embodiments of the invention only, and are presented to provide what is believed to be the most useful and understandable description of the principles and conceptual aspects of the invention. On this point, there is no attempt to introduce the structural details of the present invention beyond the level required for a basic understanding of the present invention. Those skilled in the art can clearly understand how to implement the present invention in practice through the description and accompanying drawings. Several forms.

[0026] figure 1 A schematic structural view of a pipe string 100 provided according to the present invention is shown. The tubing string 100 includes a tubing 10, a branch well sub-joint 20 connected with the tubing 10, the interior of the branch well sub-jo...

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Abstract

The invention discloses a tubular column which comprises an oil tube and a branch well short section connected with the oil tube, and the branch well short section is internally provided with a drive impeller and a branch well drill pipe connected with the drive impeller. The drive impeller moves and rotates at the same time under driving of fluid, so that the branch well drill pipe is driven to extend out of the tail end of the branch well short section. The tubular column greatly shortens the well building period of branch holes and reduces the well building cost of the branch holes in the drilling completion of the branch holes.

Description

technical field [0001] The invention relates to an oil well tool, in particular to a pipe string for branch wells. Background technique [0002] Branch well is an effective technical approach to enhance oil and gas recovery. The existing branch well construction technology is to run a sidetracking tool at the design position of the branch well after drilling a main wellbore (vertical well, directional well, and horizontal well), and run it again for sidetracking to form a branch well. After the well is drilled, run the sidetracking tool again at another branch well design position to carry out sidetracking, so reciprocating, and complete two or more wellbores (directional wells, horizontal wells, wave branch wells). [0003] In the existing technology, multi-branch wells mean a longer well construction period. At the same time, due to drilling more formations, they face greater construction risks. The more branches, the longer the well construction period and the greater th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00E21B4/02
CPCE21B17/00E21B4/02
Inventor 曾义金马兰荣戴文潮赵晨熙程光明尹垒邓继文
Owner CHINA PETROLEUM & CHEM CORP
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