A Method of Reducing Rotary Steering Downhole Vibration

A technology of rotary steering and rotational speed, which is applied in the field of oil drilling, which can solve the problems of rotary vibration damage, large vibration, affecting drilling safety and drilling efficiency, etc., and achieves the effects of improving measurement accuracy, strong aggressiveness, and avoiding lateral impact on the well wall

Active Publication Date: 2021-07-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rotary steerable still has a large vibration during the drilling process, which is easy to cause damage to the rotary steerable vibration, affecting drilling safety and drilling efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for reducing downhole vibration of rotary steerable, comprising the following steps:

[0025] a. Before drilling, judge whether the downhole situation is normal;

[0026] b. If the downhole of the deflection section is normal, the first drilling tool assembly is run in. The first drilling tool assembly consists of a PDC drill bit, a rotary steering, a non-magnetic centralizer for stabilizing the rotating steering and avoiding lateral impact on the well wall, and A non-magnetic drill rod forming a non-magnetic environment and a screw rod for increasing the centripetal force of the rotating guide;

[0027] If the deflection section is abnormal downhole, run into the second drilling tool assembly, the second drilling tool assembly is composed of PDC bit, rotary steering and screw rod or the second drilling tool assembly is composed of PDC bit, rotary steering and non-magnetic drill pipe;

[0028] c. If the downhole of the horizontal section is normal, the third d...

Embodiment 2

[0033] A method for reducing downhole vibration of rotary steerable, comprising the following steps:

[0034] a. Before drilling, judge whether the downhole situation is normal;

[0035] b. If the downhole of the deflection section is normal, the first drilling tool assembly is run in. The first drilling tool assembly consists of a PDC drill bit, a rotary steering, a non-magnetic centralizer for stabilizing the rotating steering and avoiding lateral impact on the well wall, and A non-magnetic drill rod forming a non-magnetic environment and a screw rod for increasing the centripetal force of the rotation guide;

[0036] If the deflection section is abnormal downhole, run into the second drilling tool assembly, the second drilling tool assembly is composed of PDC bit, rotary steering and screw rod or the second drilling tool assembly is composed of PDC bit, rotary steering and non-magnetic drill pipe;

[0037] c. If the downhole of the horizontal section is normal, the third d...

Embodiment 3

[0043] A method for reducing downhole vibration of rotary steerable, comprising the following steps:

[0044] a. Before drilling, judge whether the downhole situation is normal;

[0045] b. If the downhole of the deflection section is normal, the first drilling tool assembly is run in. The first drilling tool assembly consists of a PDC drill bit, a rotary steering, a non-magnetic centralizer for stabilizing the rotating steering and avoiding lateral impact on the well wall, and A non-magnetic drill rod forming a non-magnetic environment and a screw rod for increasing the centripetal force of the rotation guide;

[0046] If the deflection section is abnormal downhole, run into the second drilling tool assembly, the second drilling tool assembly is composed of PDC bit, rotary steering and screw rod or the second drilling tool assembly is composed of PDC bit, rotary steering and non-magnetic drill pipe;

[0047] c. If the downhole of the horizontal section is normal, the third d...

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PUM

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Abstract

The invention discloses a method for reducing downhole vibration of rotary steering, which belongs to the technical field of oil drilling, and is characterized in that it comprises the following steps: a. before drilling, judging whether the downhole condition is normal; b. If the downhole of the deflection section is abnormal, run the second drilling assembly; c. If the horizontal section is normal, run the third drilling assembly; if the horizontal section is abnormal, run the fourth Drilling tool assembly; d. During the drilling process, when the lateral vibration is greater than level 5, reduce the drill pressure and reduce the speed; when the lateral vibration is greater than level 8, lift the drilling tool assembly to release the vibration; when the stick-slip vibration is greater than level 5, Reduce the drilling pressure and increase the speed; when the stick-slip vibration is greater than level 9, lift the drilling tool assembly. The invention can effectively reduce the vibration of the rotary guide on the basis of ensuring the safety in the well, improve the stability of the rotary guide in use, prolong the service life of the rotary guide and improve the drilling efficiency.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a method for reducing downhole vibration of rotary steering. Background technique [0002] Shale gas is natural gas that exists in the pores of shale fractures. To make it flow into the wellbore as much as possible, the fractures in the reservoir must be rationally used to make the wellbore pass through as many reservoirs as possible. Now the industry mostly uses horizontal drilling It is of great significance to expand the development of shale gas. [0003] Shale gas is produced in sedimentary rocks with extremely low permeability. Most gas-producing shales are widely distributed, thick and generally contain gas, which enables shale gas wells to produce gas stably for a long time. Shale gas is found in muddy shale formations. It mainly exists in free and adsorbed states. Free gas has a fast percolation speed, high initial production but rapid production decline. On t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/06E21B17/10
CPCE21B7/06E21B17/1078
Inventor 白璟张德军陆灯云韩烈祥岳步江高林张斌张继川刘伟汪洋郑超华连太炜陈东廖冲王新建肖占朋马慧斌
Owner BC P INC CHINA NAT PETROLEUM CORP
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