Method for completion, maintenance and stimulation of oil and gas wells
US7770638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2008 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for inducing motion in solid particulates in a solid/liquid mixture located in proximity to the periphery of a wellbore or in the formation zone adjacent to a wellbore in an oil or gas formation. The method includes introducing a gas impulse device into the wellbore. It then requires firing the gas impulse device so as to generate impulses of high pressure compressed gas, thereby to produce pressure waves within the wellbore and its surrounding formation. This causes motion of the solid particulates which permits settling and/or redistribution of the solid particulates. In some cases it even causes particulate flow, as in cold heavy oil production with sand (CHOPS). The method also frees blockages caused by the solid particulates and stimulates productivity. The method may inter alia be used in gravel pack construction and maintenance, well cementing operations and in CHOPS stimulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.