Combined casing system and method
US9822614B2 · kind B2 · utility
0Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2012 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Feb 27, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/103
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a method for drilling and casing a wellbore using a drilling rig having a predetermined load capacity, using a casing scheme comprising two or more casing strings, and at least one combined casing string, which includes a first one of the casing strings fitting within a second casing string. The weight of the at least one combined casing string may exceed the load capacity of the drilling rig, and the weight of each of the parts of the at least one combined casing string is less than the load capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.