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Downhole drilling apparatus and method of control thereof

一种控制器、钻柱的技术，应用在钻井的自动控制系统、钻孔设备和方法、钻井设备等方向，能够解决裂纹扩散、井下扭矩不稳定、钻头性能不良等问题

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Downhole vibration by itself or in combination with resonance can have a number of negative effects on drilling operations, including poor bit performance, instability of downhole torque, excessive wear of drill string components, crack propagation in and on the tool body, MWD / Failure of electronics in LWD tools, and damage to top drives and other drilling equipment
In addition to these deficiencies, severe vibration can also affect drilling efficiency by reducing the rate of penetration (ROP) and reducing the quality of the wellbore
All of these factors will increase the overall cost of the operator (in the form of extended drilling time) and the service company, which will have to spend a lot of financial resources on repair and maintenance

Method used

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  • Downhole drilling apparatus and method of control thereof
  • Downhole drilling apparatus and method of control thereof
  • Downhole drilling apparatus and method of control thereof

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Embodiment Construction

[0020] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. It should be noted that, where applicable, like or similar reference numerals are used in the drawings to indicate like or similar elements.

[0021] The drawings show embodiments of the invention for purposes of illustration only. Those skilled in the art will be able to devise alternative embodiments from the following description without departing from the general principles of the invention.

[0022] figure 1 A schematic diagram of a downhole drilling system according to one embodiment of the invention is shown.

[0023] The downhole drilling system 100 has a derrick 1 on the ground. Kelly driver 2 transports drill string 3 into wellbore 5 . The lower part of the drill string 3 is a downhole tool assembly (BHA) 4 comprising a drill collar 8 on which a MWD tool 9 is mounted, an LWD tool 10 , a downhole motor 11 , a measuring sub 7 ...

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Abstract

A downhole drilling system for reducing impact of vibration comprises a drill string having a bottom hole assembly (BHA) and a controller configured to control the downhole drilling system. The BHA includes a measurement sub configured to measure one or more of lateral, torsional, and axial vibrations. In this system, the controller controls the downhole drilling system based on a drilling environmental profile including drilling parameters of one or more of the lateral, torsional, and axial vibrations and further based on a vibration mode and a vibration level of the one or more of the lateral, torsional, and axial vibrations determined from the drilling environmental profile.

Description

technical field [0001] The present invention relates to a drilling system, and more particularly, to a downhole drilling device for forming a wellbore underground for reducing vibration effects and a control method thereof. Background technique [0002] Electronic parts operating in downhole drilling conditions, such as printed circuit board assemblies (PCBAs) in measurement-while-drilling (MWD) or logging-while-drilling (LWD) tools, are subject to substantial vibrational stress during their lifetime, which may Invalidation is raised during deployment. [0003] Vibration can be very damaging and seriously impact drilling operations by extending non-productive time due to tool failure or reduced drilling efficiency. Therefore, the monitoring and reduction of vibration is important for drilling optimization. Downhole vibration by itself or in combination with resonance can have a number of negative effects on drilling operations, including poor bit performance, instability o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/00
CPCE21B44/005E21B3/02E21B47/12E21B44/00E21B31/035E21B44/02E21B12/00
Inventor 詹晟
Owner CHINA PETROLEUM & CHEM CORP