Washpipe assemblies for a power swivel
US10563770B2 · kind B2 · utility
0Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2017 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Jan 20, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A washpipe assembly for a power swivel and a power swivel incorporating the washpipe assembly. In an embodiment, the washpipe assembly includes a washpipe including a central axis and a radially outermost cylindrical surface. In addition, the washpipe assembly includes a first packing assembly configured to be coupled to a stem of the power swivel. The first packing assembly includes a seal assembly that includes one or more annular seal members each including a body and a contact insert mounted to the body, the contact insert engaging and forming a dynamic seal with the radially outermost cylindrical surface of the washpipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.