Vacuum feed supply system for drilling fluid additives
US8047305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2010 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for forming a subterranean wellbore may include a pump and an additive supply. The pump pumps a drilling fluid into the wellbore while also generating a pressure differential that draws an additive across a supply line connected to the additive supply. The drilling fluid may be a gas or a liquid. A method for forming a wellbore may include drilling the wellbore, circulating a drilling fluid in the wellbore using a pump; and supplying an additive to the drilling fluid by flowing the additive across a supply line using a pressure differential generated by the pump. The pump may generate a vacuum pressure at a supply line outlet and/or create a pressure differential in the supply line. The flow of additive across the supply line may be regulated and/or stopped when the pump is not operating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.