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Bidirectional force-bearing slurry bearing device and rotating guiding tool utilizing same

A bearing device and rotational guidance technology, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problems of reduced life of rolling bearings, inability to work with high life, and the inability of conventional rolling bearings to withstand bidirectional axial forces. Increased force, high drilling life and low bending stress

Active Publication Date: 2018-06-29
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

[0006] 1) Conventional rolling bearings cannot withstand bidirectional axial force
[0007] 2) Conventional rolling bearings need to work in lubricating oil, and cannot work with high life in the harsh drilling mud environment containing sand particles
[0008] 3) The lubricating oil where the rolling bearing is located needs to be sealed by dynamic seals, otherwise, after the lubricating oil leaks, the life of the rolling bearing will be greatly reduced

Method used

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  • Bidirectional force-bearing slurry bearing device and rotating guiding tool utilizing same
  • Bidirectional force-bearing slurry bearing device and rotating guiding tool utilizing same
  • Bidirectional force-bearing slurry bearing device and rotating guiding tool utilizing same

Examples

Experimental program
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Effect test

Embodiment 2

[0069] 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:

[0070] 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

[0076] 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:

[0077] 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...

Embodiment 4

[0079] A two-way load-bearing mud bearing device, which can be applied to the static pushing type high-inclination-rate rotary guide tool described in Embodiments 1-3. Such as Figure 11-12 As shown, the two-way load-bearing mud bearing device is arranged between the non-rotating outer casing at the lower part of the rotary steerable tool and the drill bit shaft 15, and is used to isolate the rotational movement of the drill bit shaft 15 so that the non-rotating motion of the rotary steerable tool The casing does not rotate relative to the ground, wherein the "non-rotating casing" mentioned in the embodiments is the second non-rotating casing 12 mentioned in Embodiments 1-3.

[0080] The two-way force-bearing mud bearing device includes a set of radial bearing support surface structures and two sets of axial bearing support surface structures, so that the non-rotating outer sleeve of the rotating guide tool bears two-way axial force, and the two-way force-bearing A mud bearin...

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Abstract

The invention mainly belongs to the technical field of rotating guiding systems and particularly relates to a bidirectional force-bearing slurry bearing device and a rotating guiding tool utilizing the same. The bidirectional force-bearing slurry bearing device is arranged between non-rotating outer sleeves and a drill bit shaft on the lower portion of the rotating guiding tool and used for isolating rotating movement of the drill bit shaft so as to enable the non-rotating outer sleeves of the rotating guiding tool not to rotate in a relatively-large mode. Through the bidirectional force-bearing slurry bearing device, the non-rotating outer sleeves can be positioned in the radial direction and the biaxial direction and supported on the drill bit shaft, and accordingly the rotating guidingtool can work in bad slurry. The rotating guiding tool adopts the static internal pushing-abutting hinging type design; by hinging a non-rotating measurement and control body and a non-rotating execution mechanism body, the non-integral type structure is achieved; and a drilling tool is easily bent in a borehole, and thus bending stress to the upper portion of the guiding tool is small.

Description

technical field [0001] The invention mainly belongs to the technical field of rotary steering systems, and in particular relates to a two-way load-bearing mud bearing device and a rotary guiding tool using the bearing device. Background technique [0002] Rotary steerable technology belongs to the field of directional drilling, and is mainly used for three-dimensional 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 former conventional low build-up rate (6.5° / 30m) rotary steerable tool can no longer meet the needs of shale gas directional well drilling and offshore land high curvature well drilling. for example: [0003] The Baker Hughes AutoTrak Curve rotary steerable tool uses thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/06F16C29/02F16C33/04
CPCE21B7/06F16C29/02F16C33/04
Inventor 杜建生底青云王自力陈文轩何新振
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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