Orientation method of sealing tool of multilateral well window

A technology of branch wells and tools, which is applied in directional drilling, sealing/packing, earthwork drilling and production, etc. It can solve problems such as the difficulty of positioning window sealing tools in wells, and achieve the effect of easy operation and simple positioning and orientation

Inactive Publication Date: 2010-08-04
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for orienting the window sealing tool of a branch well, which solves the problem of difficult positioning of the window sealing tool in the well

Method used

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  • Orientation method of sealing tool of multilateral well window
  • Orientation method of sealing tool of multilateral well window
  • Orientation method of sealing tool of multilateral well window

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Embodiment Construction

[0011] In the figure, the completed branch well consists of a branch wellbore 1, a main wellbore 2, and a predetermined orientation and positioning device 3; the branch well sealing tool consists of a branch wellbore sealing cylinder 4, a main wellbore sealing cylinder 5, and a directional positioning device 6 composition; in figure 1 In the above, the orientation and positioning device of the window sealing tool is located at an appropriate position in the main wellbore at the lower part of the window. Correspondingly, the window sealing tool is located at the lower end of the main wellbore sealing cylinder. When the directional positioning device is the completion string, the window sealing tool is used to seal the window. After the window sealing tool is lowered into the predetermined position in the well with a drilling tool, the directional positioning device at the lower part of the sealing tool first contacts with the directional positioning device in the well, and the ...

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Abstract

The invention relates to an orientation method of a sealing tool of a multilateral well window for sealing the multilateral well window in an oil well or a water well, and the method is realized through an orientation and positioning device; a multilateral well after completion consists of a multilateral well bore, a main well bore and the prefabricated orientation and positioning device; the sealing tool of the multilateral well consists of a sealing bore of a multilateral well borehole, the sealing bore of a main well borehole and the orientation and positioning device; the orientation and positioning device of the sealing tool of the window is positioned in the appropriate position of the main well borehole at the lower part of the window, the orientation and positioning device of the corresponding sealing tool of the window is arranged at the lower end of the sealing bore of the main well borehole, and the sealing tool is adopted for sealing the window when the orientation and positioning device which goes down is a well completion pipe string during the well completion of the multilateral well; and the orientation and positioning device in the sealing tool of the window is positioned in the appropriate position in the main well borehole at the upper part of the window and the corresponding sealing tool of the window is also arranged in the sealing bore of the main well borehole. The method can solve the problem of difficult downhole positioning of the sealing tool of the window. The orientation method can be used for the sealing operation of the multilateral well window in the oil well or the water well.

Description

Technical field: [0001] The invention relates to an orientation method for a branch well window sealing tool used for sealing a branch well window in oil and water wells. Background technique: [0002] With its high single-well production and low crude oil production cost, branch well has become the leading technology of crude oil production in the world, and its window sealing is the main indicator of the degree of completion of branch well. At present, domestic branch well technology is only at level four, and there is no reliable mechanical seal at the window. On the basis of level four branch wells, the branch fork is sealed, and the completion level of branch wells is raised to level six. Orientation of sealing tools presents a completely new approach Invention content: [0003] The object of the present invention is to provide a method for orienting the window sealing tool of a branch well, which solves the problem of the difficulty in positioning the window sealing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/10E21B7/04
Inventor 余雷喻晨李敏李敬东邓旭张雪赵云
Owner CNPC GREATWALL DRILLING ENG
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