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Static internal pushing hinged-type high-deflecting-rate rotary guiding tool and control method

A rotary-steering, articulated technology, applied in drilling equipment and methods, automatic drilling control systems, directional drilling, etc., can solve problems such as large bearing capacity, low working life, and difficult sealing of pistons on the body of the universal mechanism. To achieve the effects of high drilling life, high piston sealing life and improved pushing force

Active Publication Date: 2018-02-16
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the design concept of full rotation and the use of mud pressure difference to act on the piston, the universal mechanism body of the tool system has a large bearing force, and it is more likely to wear and tear in the rotating state, and the service life is low
In addition, mud containing grit causes difficult piston sealing and low operating life

Method used

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  • Static internal pushing hinged-type high-deflecting-rate rotary guiding tool and control method
  • Static internal pushing hinged-type high-deflecting-rate rotary guiding tool and control method
  • Static internal pushing hinged-type high-deflecting-rate rotary guiding tool and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a static push-to-type high deflection rate rotary steerable tool, comprising a rotating mandrel 7, a drill shaft 15, a universal joint 13 connecting the rotating mandrel 7 and the drill shaft 15, a first non-rotating Overcoat 4 and second non-rotating overcoat 12;

[0043] Such as Figure 1-2 As shown, the rotating mandrel 7 is hinged with the universal joint 13, and transmits the drill pressure and torque used for drilling to the drill bit. At the same time, the universal hinge between the first non-rotating jacket 4 and the second non-rotating jacket 12 is realized, and the hinge constitutes a hinged feature. The first non-rotating jacket isolates the rotational movement of the rotating mandrel 7 through the upper mud bearing 6 and the lower mud bearing 5 . At the same time, the upper mud bearing 6 and the lower mud bearing 5 position the first non-rotating outer casing 4 axially and radially. In addition, a bow spring device 19 is installe...

Embodiment 2

[0049] This embodiment provides a static push-in articulated high-deflection-rate rotary steering tool with a generator drill collar nipple. Among them, the static internal push against the articulated high-inclination-rate rotary steering tool is the same as that of Embodiment 1, and the specific implementation is as follows:

[0050] Such as image 3 As shown, in this embodiment, the mud turbine generator 18 that provides electric energy is positioned on the inner shoulder of the drill collar 17 nipple, and the lower end interface 18.1 of the generator is plugged into the upper end interface 11.1 of the rotary steerable tool to realize the drill collar with a generator. Electrical connection of pup joints to rotary steerable tools. Due to the separate assembly of the generator pup joint and the drill collar of the rotary steerable tool, it has the characteristics of flexible and convenient assembly, easy processing and manufacturing of the rotary mandrel drill collar 7, and...

Embodiment 3

[0056] This embodiment provides a static pushing type high-inclination rate rotary steering tool. The difference from Embodiment 1 is that this embodiment also provides a second non-rotating outer casing 12 structure to increase the second non-rotating outer casing and The rotation frictional resistance of the well wall realizes that the second non-rotating jacket always maintains a quasi-stationary state. See Figures 5A-5F shown. The specific implementation is as follows:

[0057] The second non-rotating overcoat 12 has wear-resistant ribs 12.1, and the wear-resistant ribs are straight wings. The outer circle of the wear-resistant rib is a zigzag structure, and a number of hard alloy blocks are inlaid between the zigzag structures to increase the wear resistance of the wear-resistant rib 12.1. At the same time, the wear-resistant ribs 12.1 can be 3 groups, 4 groups, or 6 groups, which are evenly distributed on the outer circle of the second non-rotating jacket 12. The spe...

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Abstract

The invention mainly belongs to the technical field of rotary guiding systems and particularly relates to a static internal pushing hinged-type high-deflecting-rate rotary guiding tool and a control method thereof. According to the static internal pushing hinged-type high-deflecting-rate rotary guiding tool, static internal pushing hinged-type design is adopted, a non-rotation measurement and control body and a non-rotation executing mechanism body are hinged, and a non-integral-type structure is achieved; and a drilling tool is prone to bending in a well, the bending stress on the upper portion of the guiding tool is small, and consumption of pushing force used for drilling tool bending deformation reaches the minimum. Rotary friction does not exist between a bearing executing mechanism body outer sleeve and the well wall, and only axial sliding exists, so that the service life is long; meanwhile, the mode of the hydraulic pressure instead of the mud pressure difference is adopted toact on a piston to form the pushing force, the pushing force is greatly increased, and the sealing service life of the piston is also prolonged; and thus, the higher deflecting rate is easy to achieveon the guiding tool, and the advantage that the well drilling service life is long is achieved.

Description

technical field [0001] The invention mainly belongs to the technical field of rotary steerable systems, and in particular relates to a static push-in hinged high-inclination-rate rotary steerable tool and a control method. Background technique [0002] Rotary steerable technology belongs to the field of directional drilling, and is mainly used for three-position trajectory well drilling such as directional wells, horizontal wells, and extended-reach wells. Relying on its own high-precision servo control mechanism and high-precision attitude measurement sensor, it can accurately control the drilling direction of the drill bit in real time, thereby realizing the control of the wellbore trajectory. The current conventional low build-up rate (6.5° / 30m) rotary steerable tools can no longer meet the needs of shale gas directional well drilling and offshore land high-curvature well drilling. [0003] The Baker Hughes AutoTrak Curve rotary steerable tool uses three sets of hydrauli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/06
CPCE21B7/062E21B7/067E21B7/064E21B44/00E21B7/068
Inventor 杜建生底青云王自力陈文轩
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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