Resonance enhanced drilling method and apparatus

A drilling equipment and equipment technology, applied in drilling equipment, drilling with vibration, automatic control system for drilling, etc.

Active Publication Date: 2009-07-22
THE UNIV COURT OF THE UNIV OF ABERDEEN REGENT WALK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvements exhibited by ultrasonic drilling are not always consistent and not always directly applicable to borehole drilling

Method used

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  • Resonance enhanced drilling method and apparatus
  • Resonance enhanced drilling method and apparatus

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Embodiment Construction

[0064] [0043] In a development of the present invention, it has been realized that particularly high drilling rates can be achieved when drilling through materials such as rock formations if the loading of the drill bit is arranged to induce resonance of the system formed by the drill bit and the formation being drilled .

[0065] [0044] However, while such resonances are obtainable on test rigs using standard samples, a different situation arises when drilling through natural rock formations. This is because drilling conditions vary from layer to layer within the formation. Consequently, the resonance conditions vary throughout the formation and therefore cannot be maintained throughout drilling.

[0066] [0045] The present invention overcomes this problem by identifying nonlinear resonance phenomena when drilling through material, and attempts to preserve the resonance in the system combined by the drill bit and the material being drilled.

[0067] [0046] To this end, Appl...

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Abstract

The present invention relates to drilling apparatus comprising a drill-bit (1) capable of rotary and high frequency oscillatory loading; and control means for controlling applied rotational and / or oscillatory loading of the drill-bit, the control means having adjustment means for varying the applied rotational and / or oscillatory loading, said adjustment means being responsive to conditions of the material through which the drill is passing. The control means is in use provided on the apparatus in a downhole location and includes sensors for taking downhole measurements of material characteristics, whereby the apparatus is operable downhole under closed loop real-time control. The apparatus can determine appropriate loading parameters for the drill-bit in order to achieve and maintain resonance between the drill-bit and the drilled material in contact therewith.

Description

technical field [0001] [0001] The present invention relates to drilling apparatus, and in particular to drilling apparatus for drilling within a material such as a rock formation. Background technique [0002] [0002] The field of drilling in rock and other materials has prompted many developments in drilling technology. In this regard, such drilling involves harsh and severe conditions as well as drilling costs and related environmental issues, for which reason there are stringent requirements on the effectiveness, reliability and safety of the drilling method. [0003] [0003] Accordingly, industries that employ downhole drilling, such as the petroleum industry, are keen to develop drilling apparatus and methods that meet these needs and enable increased drilling rates and reduced tool wear. [0004] [0004] In this regard, the oil industry increasingly needs to drill deviated or horizontal long-reach wells to access new oil reserves. However, such drilling further introduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/24E21B10/36
CPCE21B7/24E21B10/36E21B44/00
Inventor M·维尔茨哥鲁齐
Owner THE UNIV COURT OF THE UNIV OF ABERDEEN REGENT WALK
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