Large diameter tubular lifting apparatuses and methods
US9115547B2 · kind B2 · utility
3Cited by
17References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2010 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Jun 12, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/07
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method to add a joint of pipe to a conductor string includes securing the conductor string with a spider, grasping an upper end of the joint of pipe with a segmented-ring elevator, engaging a plurality of slips of the elevator with an outer profile of the joint of pipe, raising the grasped joint of pipe from non-vertical to vertical, positioning the vertical joint of pipe atop the secured conductor string, attaching the joint of pipe to the conductor string, releasing the conductor string from the spider, and retaining the joint of pipe and the conductor string with the segmented-ring elevator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.