Foot valve assembly for a down hole drill
US8561730B2 · kind B2 · utility
3Cited by
25References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2010 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Jul 24, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/36
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retaining assembly for a cylindrical member and support sleeve in the bore of a component of a DTH. The cylindrical member and support sleeve may, for example, be a foot valve assembly for insertion into a counter bore in a bit. The cylindrical member has a cylindrical member rigidity and at least a portion of the support sleeve has a rigidity greater than the cylindrical member rigidity. A gap is provided between the sleeve and the component bore of the DTH. The cylindrical member deforms in the gap, resulting in the cylindrical member being fixedly sandwiched between the support sleeve and the component bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.