Slurry up particulate placement tool
US4440218A · kind A · utility
39Cited by
5References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | May 11, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sand or gravel placement or packing apparatus for positioning particulates outside well screen includes pipe to conduct slurry to below the screen and receive clear liquid returning from outside the screen as the particulates accumulate upwardly, the apparatus including valving to provide for initial injection of clear fluid, for circulation slurry, for squeezing the slurry, for flusing the tubing and parts of the tool by reverse circulation, and for closing the slurry injection part below the screen and the lower end of the slurry pipe when the latter is withdrawn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.