http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2354781-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa167897a816e0e598235c706de2c370 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B47-06 |
| filingDate | 2000-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9aa8bba76ba29f007e9ef547fb08e60e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22faad9f7ee77f015b66dcc558a8ed52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ca03897bc17e2ac8bd601549f962f89e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0f899bdb5dc7c514177d716ad2561f32 |
| publicationDate | 2001-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2354781-A |
| titleOfInvention | Method for determining equivalent static mud density during a connection using downhole pressure measurements. |
| abstract | A method for providing the near real-time advantage of annular pressure while drilling (APWD) measurements taken during pipe connections that require the mud circulation pumps to be turned off (a "pumps-off" condition). APWD data, such as pressure measurements, are obtained from instruments and related electronics within the bottom-hole assembly (BHA). The typical output trace (figure 1) exhibits events of interest at various points - the deactivation of mud pumps and the onset of pipe connection 10 is followed by a drop in pressure toward the static pressure 14. A reactivation of the mud pumps at 20 leads to a pressure surge at 11 before settling back to the circulating pressure. The effective static downhole annular fluid pressure is estimated by using the measured pressures and fitting to various types of equation. APWD data can be measured, stored and even processed in the BHA during a pumps-off condition for subsequent processing or communication of a reduced amount of data to the driller at the surface. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10012064-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10385258-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10982520-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10385257-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10344204-B2 |
| priorityDate | 1999-03-04-04:00^^<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: 21.