Method and apparatus for dropping a pump down plug or ball
US7607481B2 · kind B2 · utility
28Cited by
28References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 2007 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Feb 14, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member or around the periphery of the valving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.