| dc.creator | Schubert, Jerome J. | |
| dc.creator | Alexander, Carmon H. | |
| dc.creator | Juvkam-Wold, Hans C. | |
| dc.creator | Weddle, Curtis E. III | |
| dc.creator | Choe, Jonggeun | |
| dc.date.accessioned | 2019-06-17T16:57:22Z | |
| dc.date.available | 2019-06-17T16:57:22Z | |
| dc.date.issued | 2002-12-31 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/176719 | |
| dc.description.abstract | A method for detecting a leak in a drill string valve used when drilling a subsea well. The method comprises measuring a first inlet pressure at a subsea mudlift pump while a subsea mudlift pump and a surface pump are operating and before a well is fully shut-in and measuring a second inlet pressure at the subsea mudlift pump after the mudlift pump and the surface pump are shut down and after the well is fully shut-in. The first and second subsea mudlift pump inlet pressure measurements are then compared, and a check is performed to determine if the subsea mudlift pump inlet pressure has increased by an amount greater than an estimated annular friction pressure. | en |
| dc.language | eng | |
| dc.publisher | United States. Patent and Trademark Office | |
| dc.rights | Public Domain (No copyright - United States) | en |
| dc.rights.uri | http://rightsstatements.org/vocab/NoC-US/1.0/ | |
| dc.title | Method for detecting a leak in a drill string valve | en |
| dc.type | Utility patent | en |
| dc.format.digitalOrigin | reformatted digital | en |
| dc.description.country | US | |
| dc.contributor.assignee | Conoco, Inc. | |
| dc.contributor.assignee | The Texas A&M University System | |
| dc.identifier.patentapplicationnumber | 09/730891 | |
| dc.subject.uspcprimary | 166/337 | |
| dc.subject.uspcother | 73/152.27 | |
| dc.subject.uspcother | 166/250.08 | |
| dc.date.filed | 2000-12-06 | |
| dc.publisher.digital | Texas A&M University. Libraries | |
| dc.subject.cpcprimary | E21B 21/08 | |
