Method and system for predicting drilling events
US-2015369042-A1 · Dec 24, 2015 · US
Low frequency formation shear slowness from drilling noise derived quadrupole array data
US8944183B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8944183-B2 |
| Application number | US-201113198265-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 4, 2011 |
| Priority date | Aug 11, 2010 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formations adjoining a borehole or passing through a portion of the subsurface. The apparatus may include: a bottomhole assembly, a drill bit configured to generate an acoustic signal, at least two acoustic detectors, and a processor. The acoustic signal may include a specific multipole signal that may propagate through an earth formation along the borehole. The method may include use of the apparatus, including steps for estimating a shear velocity of the acoustic signal using signals from the at least two acoustic detectors.
First claim
Opening claim text (preview).
We claim: 1. An apparatus configured to evaluate an earth formation, the apparatus comprising: a bottomhole assembly (BHA) configured to be conveyed in a borehole; a drillbit on the BHA configured to generate an acoustic signal including multipole components propagating through the earth formation during continued rotation of the BHA; a drill collar on the BHA coupled to the drillbit, wherein the drillbit and drill collar are configured, when rotating at a frequency in a prede…
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- E21B49/003Primary
Fixed Constructions · mapped topic
Physics · mapped topic
Physics · mapped topic
- E21B47/00Primary
Fixed Constructions · mapped topic
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Frequently asked questions
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- What does patent US8944183B2 cover?
- The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formatio…
- Who is the assignee on this patent?
- Geerits Theodorus W, Patterson Douglas J, Baker Hughes Inc
- What technology area does this patent fall under?
- Primary CPC classification E21B49/003. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Feb 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).