http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2230902-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_85d41fb1f3bcc2e2bb166676457b1835 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V3-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V3-32 |
| filingDate | 1998-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23aafc956a7400e2755a4f2139b1e8f4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_08b0a67febc44ff6de5bc89c83d36cb5 |
| publicationDate | 2002-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2230902-C |
| titleOfInvention | Radial nmr well logging apparatus and method |
| abstract | ABSTRACT OF THE DISCLOSURE A nuclear magnetic resonance sensing apparatus, including a magnet for inducing a static magnetic field within materials to be analyzed. The magnetic field is 5 substantially coaxial with a longitudinal axis of the apparatus. The magnetic field is polarized substantially perpendicularly to the longitudinal axis and is symmetric about the axis. The static magnetic field has a maximum longitudinal gradient which isinversely related to a speed of motion of the apparatus along the longitudinal axis through the materials to be analyzed. The apparatus includes a transmitter for generating 10 a radio frequency magnetic field in the materials for exciting nuclei in the materials. The radio frequency magnetic field is substantially orthogonal to the static magnetic field. The apparatus includes a receiver for detecting nuclear magnetic resonance signals from the excited nuclei in the materials. In a preferred embodiment, the magnet comprise magnetized cylinders stacked along the longitudinal axis. The magnetization of each of 15 cylinder is proportional to its distance from a center plane of the magnet. The cylinders are magnetized parallel to the longitudinal axis and towards the center plane. The preferred embodiment of the magnet includes an end magnet disposed at each longitudinal end of the stacked cylinders. The end magnets are each magnetized parallel to the longitudinal axis and in a direction opposite to the magnetization of an adjacent 20 one of the cylinders. |
| priorityDate | 1997-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 17.