Method for controlling loss of drilling fluid
US8393411B2 · kind B2 · utility
11Cited by
41References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Aug 19, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods for drilling and treating for lost returns continuously while drilling are provided. High fluid loss drilling fluid is used, along with particulate material that forms an immobile mass in hydraulic fractures to prevent their growth. The particulate material may be selected based on the predicted size of a hydraulic fracture, based on particle size to minimize fines, based on specific gravity to attain high solids content for a selected fluid density, and/or based on permeability of the particles to attain a high spurt loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.