http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1401712-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_921174315447fa4bb024d39017c1af08 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-08 |
| filingDate | 1973-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1401712-A |
| titleOfInvention | Method and apparatus for determining communication in a borehole between a perforated zone and a second zone |
| abstract | 1401712 Detecting faults in bore hole linings R R VANN 11 Jan 1973 1492/73 Heading G1A Faults 22 or 24, in the cement lining 14 between the bore hole casing 10 and the outside of the bore hole 8, which would allow oil to escape via faults 22 or 24 to other formations 23 or 25 instead of passing via perforation 20 into the bore hole, are detected by placing radio-active material (at positions 26, 36 outside and inside the lining 14) upstream and downstream of the perforation the radio-active material being soluble in water and/or acid and/or oil so that if cracks or faults are present the radio-active material will be "washed" into them and the presence length and direction of the cracks can then be detected by a radio-active counting device passed down the well. The interface 50, formed between the top of the cement lining or plug 14 and other mudlike material which may fill the upper bore hole annulus, may be detected by including radio-active pellets 51 in the cement slurry which is pumped in to form the cement lining 14, the pellets being of a density slightly less than cement and substantially greater than water so that they will come to rest in close proximity to the interface 50. A radio-active material of a different half life may be used at each position to provide more detailed information of the formation and direction of the faults. The radio-active material for the inside of the lining may be in pellet 26 form spaced around the collets joining adjacent pieces of casing, the material may be painted on, or it may be placed in a continuous groove around the outside of the collet Fig. 4 (not shown). The radio-active material for the outside of the lining may be incorporated in blocks 36 which are attached to the spaced apart bows of the casing centralizers 18, 118, 19 or they may be painted on the bows. The description also deals with methods of detecting defects and their remedy at various stages of the construction of cement lining section of the borehole. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10344204-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10385257-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10385258-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10012064-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10982520-B2 |
| priorityDate | 1973-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 |
Total number of triples: 17.