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Static offset rotary steerable drilling tool with sandwich cylinder structure

A technology of rotary steerable drilling and static offset, applied in directional drilling, drilling equipment, drill pipe, etc., can solve the problem of centralizer setting position, difficulty in carrying cuttings, and difficulty in exiting or re-entering the well without rotating the casing. Thickness of the sleeve and other problems can reduce the risk of sticking, solve the problem of large bending moment and improve the force relationship.

Pending Publication Date: 2020-05-19
万晓跃
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current technology, when the rotary steerable tool is drilling, the non-rotating sleeve is often too thick and too long, which makes it difficult for the non-rotating sleeve to go out of the well or re-enter the well in a high-curvature hole
At the same time, the too long non-rotating sleeve also makes it difficult to set the position of the centralizer and carry cuttings

Method used

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  • Static offset rotary steerable drilling tool with sandwich cylinder structure
  • Static offset rotary steerable drilling tool with sandwich cylinder structure
  • Static offset rotary steerable drilling tool with sandwich cylinder structure

Examples

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no. 1 example

[0042] First example: see figure 1 , figure 2 with Figure 5 , a static offset hybrid or pointing rotary steerable drilling tool with a sandwich structure, which belongs to one of the static offset rotary steerables with a sandwich structure described in the present invention, including a non-rotating sleeve 6, an offset Control mechanism, drive shaft assembly, central shaft 25 and drill bit 1,

[0043] The rear part of the non-rotating sleeve is provided with a non-rotating sleeve rear straightening section a, and the front part of the non-rotating sleeve 6 is connected to the front part of the central shaft 25 through a structure with a straightening function;

[0044] The drive shaft assembly at least includes a centralizing sleeve 26, the interior of the centralizing sleeve 26 is provided with a rear centralizing section accommodation space, and the axial length of the rear centralizing section accommodation space is the same as that of the non-rotating sleeve rear cent...

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Abstract

The invention discloses a static offset rotary steerable drilling tool with a sandwich cylinder structure. The static offset rotary steerable drilling tool comprises a non-rotary sleeve, a central shaft and a centralizing sleeve, the front part of the non-rotary sleeve is connected to the front part of the central shaft through a focusing centralizing bearing or a centralizing bearing; the rear part of the non-rotary sleeve is connected to the centralizing sleeve through at least one set of centralizing bearing; and a drill bit protruding out of the non-rotary sleeve is fixed to the front endof the central shaft. The limit connection relationship between the central shaft and the non-rotary sleeve is realized by adopting the centralizing sleeve, the length of the non-rotary sleeve exposedon the outside is shortened, so that the possibility of jamming of the rotary steerable drilling tool during the process of run-in-hole or pull-out-of-hole in a high curvature borehole is reduced, and the operational success rate of the rotary steerable drilling tool is increased.

Description

technical field [0001] The invention relates to the technical field of drilling exploration engineering, in particular to a static offset rotary steerable drilling tool with a sandwich barrel structure. Background technique [0002] With the development of the petroleum industry, more and more well types such as deep wells, ultra-deep wells, and extended-reach wells have very high requirements for drilling wellbore trajectories in the process of oil and gas field development. In response to this demand, rotary steerable drilling tools are generally used for directional drilling at present, especially static offset rotary steerable drilling tools with better reliability, because of their smooth and regular boreholes, it is more conducive to improving drilling quality and ensuring drilling safety , has a wider scope of application and application prospects. [0003] In the current technology, when the rotary steerable tool is drilling, the non-rotating sleeve is often too thi...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B17/10E21B7/06
CPCE21B7/04E21B17/1078E21B7/06
Inventor 徐梓辰
Owner 万晓跃
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