Downhole ball dropping apparatus
US7100700B2 · kind B2 · utility
15Cited by
19References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2002 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Sep 24, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ball release mechanism is mounted near the intended seat. The ball or balls are kept out of the circulating stream. High circulation rates followed by curtailment of circulation places an outlet port in position to allow the ball or balls to be pushed out by a spring. The spring or one of the balls prevents the return of an ejected ball back into the protected pocket. The ball is delivered to the seat without circulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.