Cement mixing and pumping system and method for oil/gas well
US5289877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Nov 10, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F35/2209
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and method for mixing cement slurries at an oil or gas well site and for pumping such slurries into the well provide automatic combined and interrelated density and pumping control and selectable sequential control of predetermined mixing and pumping stages. Specific conditions automatically controlled include water rate, water pressure, slurry density, recirculating slurry pressure and downhole pump rate. Each of these conditions is the subject of a respective control loop that operates independently, but under control from a central controller. The central controller generates interrelated inlet water, inlet dry cement and outlet downhole pumping control signals responsive to operated-entered desired operating characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.