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A stabilizing screw drilling tool for extended reach directional wells

A technology for screw drilling tools and directional wells, which is applied in directional drilling, drill pipes, drill pipes, etc., can solve the problems of reduced drilling efficiency, insufficient tilt stabilization effect, and high sliding drilling ratio, so as to improve drilling efficiency and increase composite The effect of drilling time and reducing the number of orientations

Active Publication Date: 2017-08-04
DEZHOU UNITED GASOLINEEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this combination is used in the drilling of extended-reach directional wells and horizontal wells, when the formation encountered or the pressure on bit changes, problems such as declination or inclination enhancement will occur, and the inclination stabilization effect is not good enough. The ratio of drilling is high, which reduces the drilling efficiency

Method used

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  • A stabilizing screw drilling tool for extended reach directional wells
  • A stabilizing screw drilling tool for extended reach directional wells
  • A stabilizing screw drilling tool for extended reach directional wells

Examples

Experimental program
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Embodiment Construction

[0020] Such as figure 1 As shown, a stabilizing screw drilling tool for extended-reach directional wells includes a bypass valve assembly 1 , an anti-drop assembly 2 , a motor assembly 3 , a cardan shaft assembly 4 , and a transmission shaft assembly 5 .

[0021] The cardan shaft assembly 4 includes a segmented cardan shaft housing; the cardan shaft housing includes three centering shells that are screwed in turn, and the direction from top to bottom is the upper centering shell 6, the middle Righting housing 7 and lower righting housing 8 .

[0022] The transmission shaft assembly 5 includes a transmission shaft housing, and the transmission shaft housing includes an upper bearing housing 9 and a lower bearing housing 10 .

[0023] The upper end of the upper bearing shell 9 is screwed to the lower end of the lower centering shell 8 ; the upper end of the lower bearing shell 10 is screwed to the bottom of the upper bearing shell 9 .

[0024] The axis of the middle centering ...

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Abstract

An angle holding screw drilling tool for an extended-reach directional well comprises a bypass valve assembly, an anti-falling assembly, a motor assembly, a cardan shaft assembly and a transmission shaft assembly. The angle holding screw drilling tool for the extended-reach directional well is characterized in that a cardan shaft shell comprises three righting shells which are sequentially connected through threads; the middle righting shell has a bending angle; the upper righting shell is provided with a plurality of straight edges parallel to the axis of the upper righting shell, the lower righting shell is provided with a plurality of straight edges parallel to the axis of the lower righting shell, and the straight edges on each righting shell are uniformly distributed around the axis of the shell; the upper end of an upper bearing shell in a transmission shaft shell is in threaded connection with the lower end of the lower righting shell; the upper end of a lower bearing shell is in threaded connection with the bottom end of the upper bearing shell; the upper bearing shell is also provided with a plurality of straight edges parallel to the axis of the upper bearing shell, and the straight edges of the upper bearing shell are uniformly distributed around the axis of the upper bearing shell; the numbers of the straight edges of the three shells are equal; the straight edges of the upper righting shell and the straight edges of the lower righting shell are positionally staggered, and the straight edges of the upper bearing shell and the straight edges of the lower righting shell are positionally staggered. The drilling tool enables hole drift angles formed in the angle holding section drilling process of the extended-reach directional well and a horizontal well to be constant, and reduces the number of times of positioning in the drilling process.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a stabilizing screw drilling tool for drilling in the stabilizing section of large-displacement directional wells and horizontal wells. Background technique [0002] At present, the main structure of conventional screw drilling tools used in various domestic oil fields is: bypass valve assembly + anti-drop assembly + motor assembly + fixed-angle cardan shaft assembly + transmission shaft assembly, which are generally used in large-reach directional wells and the stabilizing section of the horizontal well. However, when this combination is used in the drilling of extended-reach directional wells and horizontal wells, when the formation encountered or the pressure on bit changes, problems such as declination or inclination enhancement will occur, and the inclination stabilization effect is not good enough. The high penetration ratio reduces the drilling efficiency. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/08E21B17/10
CPCE21B7/06E21B17/10
Inventor 王得宸王凡赵振华殷凤玲于卫东袁雷
Owner DEZHOU UNITED GASOLINEEUM MACHINERY
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