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1. WO2018156857 - DETECTING ANOMALIES IN ANNULAR MATERIALS OF SINGLE AND DUAL CASING STRING ENVIRONMENTS

Publication Number WO/2018/156857
Publication Date 30.08.2018
International Application No. PCT/US2018/019359
International Filing Date 23.02.2018
IPC
G01V 5/12 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
5Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
04specially adapted for well-logging
08using primary nuclear radiation sources or X-rays
12using gamma- or X-ray sources
CPC
G01N 9/00
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
G01N 9/24
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
24by observing the transmission of wave or particle radiation through the material
G01V 1/46
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
1Seismology; Seismic or acoustic prospecting or detecting
40specially adapted for well-logging
44using generators and receivers in the same well
46Data acquisition
G01V 13/00
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
13Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by the preceding groups
G01V 5/12
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
5Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
04specially adapted for well-logging
08using primary nuclear radiation sources or X-rays
12using gamma or X-ray sources
G21K 1/10
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
1Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
10Scattering devices; Absorbing devices; Ionising radiation filters
Applicants
  • TEAGUE, Philip [US]/[US]
  • STEWART, Alex [US]/[US]
Inventors
  • TEAGUE, Philip
  • STEWART, Alex
Agents
  • FERRERA, Raymond, R.
Priority Data
15/903,15523.02.2018US
62/464,17427.02.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DETECTING ANOMALIES IN ANNULAR MATERIALS OF SINGLE AND DUAL CASING STRING ENVIRONMENTS
(FR) DÉTECTION D'ANOMALIES DANS DES MATÉRIAUX ANNULAIRES D'ENVIRONNEMENTS À COLONNE DE TUBAGE UNIQUE ET DOUBLE
Abstract
(EN)
An x-ray based cement evaluation tool for measurement of the density of material volumes within single, dual and multiple-casing wellbore environments is provided, the tool including at least an internal length comprising a sonde section, wherein said sonde section further comprises an x-ray source; a radiation shield for radiation measuring detectors; sonde- dependent electronics; and a plurality of tool logic electronics and PSUs, wherein the tool uses x- rays to illuminate the formation surrounding a borehole and a plurality of detectors are used to directly measure the density of the cement annuli and any variations in density within. Detectors used to measure casing standoff such that other detector responses are compensated for tool stand-off and centralization; a plurality of reference detectors is used to monitor the output of the x-ray source, and a shortest-axial offset detector is configured to distribute incoming photons into energy classifications such that photoelectric measurements may be made.
(FR)
L'invention concerne un outil d'évaluation de ciment à base de rayons X destiné à la mesure de la densité de volumes de matériau dans des environnements de puits de forage à tubage unique, double et multiple, l'outil comprenant au moins une longueur interne comprenant une section de sonde, ladite section de sonde comprenant en outre une source de rayons X; un écran de rayonnement destiné à des détecteurs de mesure de rayonnement; une électronique dépendante de la sonde; et une pluralité d'électroniques de logique d'outil et de PSU, l'outil utilisant des rayons X pour éclairer la formation entourant un trou de forage et une pluralité de détecteurs servant à mesurer directement la densité des espaces annulaires de ciment et toute variation de densité à l'intérieur de détecteurs servant à mesurer une distance annulaire de tubage de sorte que d'autres réponses de détecteur soient compensées en ce qui concerne la distance annulaire et la centralisation de l'outil; une pluralité de détecteurs de référence servant à surveiller la sortie de la source de rayons X, et un détecteur de décalage axial le plus court étant conçu pour distribuer des photons entrants en classifications d'énergie de sorte que des mesures photoélectriques puissent être effectuées.
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