Standard Number, ASTM D – Title, Standard Test Methods for Downhole Seismic Testing. Status, Current. Publication Date, Standard Test Methods for Downhole Seismic Testing. Status: Withdrawn · Replaced by: ASTM D Buy this standard. Price: SEK. PDF. Add to cart. ASTM D Significance and Use. The seismic downhole method provides a designer with information pertinent to the seismic wave velocities of the materials .
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Are you sure you want to empty the cart? The electronic file may not be reproduced in any d7400. In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. All of Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineeringworld reknowned for NDT consulting.
The quality of the results produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities.
The most complete version of this downhole system, as manufactured by Olson Instruments, is comprised of a borehole source capable of generating shear and compressional waves and a pair of matching three component triaxial geophone receivers.
ASTM D7400 – 17
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The standard is now in your shopping cart. Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Transverse isotropy is a particularly simple form of anisotropy because velocities only vary with vertical incidence angle and not with azimuth. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
NDT System Add-On — Crosshole / Downhole Seismic
Combining values from the two systems may result in non-conformance with the standard. Users of this standard are cautioned that compliance with Practice D does not in itself assure reliable results.
This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. Another important use of estimated shear wave velocities in geotechnical design is in the liquefaction assessment of soils. The Downhold Seismic DS investigations are similar to CS investigations, but require only one borehole to provide shear and compressional velocity wave profiles.
Astk reduction and interpretation is limited to the identification of various seismic wave types, apparent velocity relation to true velocity, example computations, use of Snell’s law of refraction, and assumptions. Enter your personal account email address to request a password reset: No items in cart. Read more about Astj Subscriptions.
These test methods primarily concern the actual test procedure, data interpretation, and specifications for equipment which will yield uniform test results.
ASTM D – 17 Standard Test Methods for Downhole Seismic Testing
Several types of commercially available receivers and recording systems can also be used to conduct an acceptable downhole survey. Click here for Agents. The OE Website is loaded with Tech Brief and project photos using the equipment d77400 on this website. Special consideration should be given to the types of receivers used and their configuration. In addition, they are representative of the significant digits that should generally be retained. Reporting of test results in units other than SI shall not be regarded as non-conformance with this standard.
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ASTM D – 14 Standard Test Methods for Downhole Seismic Testing
These parameters are used in both analyses of soil behavior under both static and dynamic loads where the elastic constants are input variables into the models defining the different states of deformations such as elastic, elasto-plastic, and failure. Heavily-damped sensors should not be used so that spectral smearing, phase shifting, and latency response between sensors is avoided.
This is typically accomplished by coupling a plank to the ground near the borehole and then impacting the plank in the vertical and horizontal directions.
Inch-pound units are provided for convenience. Special consideration should be given to the types of receivers used and their configuration.
Other items addressed include source-to-receiver spacing, drilling, casing, grouting, a procedure for borehole installation, and conducting actual borehole and seismic cone tests. No further reproductions authorized. Two methods are discussed, which include using either one or two downhole sensors receivers. Please login to your authorized staff account to use this feature. Work Item s – proposed revisions of this standard.
The DS method uses a hammer source at the surface to impact a wood plank and generate shear and compressional waves. Other items addressed include source-to-receiver spacing, drilling, casing, grouting, a procedure for borehole installation, and conducting aatm borehole and seismic cone tests.
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