| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a4702519b9974cd75a1ce76eabc80d99 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-26 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-26 |
| filingDate |
1995-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1998-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_41c525bee0e237db18d35cefedce9b1f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_52382af5f5ae99d62b62852b8e1f71de |
| publicationDate |
1998-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2140830-C |
| titleOfInvention |
Rock bit back reaming inserts |
| abstract |
A means to back ream a hole drilled with a roller cone drill bit is disclosed. Protruding hard metal cutting inserts are affixed on the upper outside diameter taper of each of the bit legs. If the borehole closes to a smaller diameter than the bit gage diameter or loose rock rubble packs around the upper portion on the bit, the protruding cutting inserts fixed on the upper bit leg taper can back ream the hole by lifting and rotating the bit. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103321579-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103321579-B |
| priorityDate |
1994-01-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |