Determining drillstring neutral point based on hydraulic factor
US7845429B2 · kind B2 · utility
0Cited by
7References
2Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 21, 2007 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Feb 26, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A solution for determining a neutral point of a drillstring in drilling a borehole is disclosed. The solution includes receiving depth-time log data for drilling the borehole with the drillstring, the depth-time log data including data related to a torque and drag factor and data related to a hydraulic factor; and determining the neutral point of the drillstring at a time point during the drilling based on the torque and drag factor and the hydraulic factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.