Apparatus and method for detecting abnormal drilling conditions
US4250974A · kind A · utility
11Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Sep 25, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Abnormal drilling conditions are detected by monitoring mud volume of the mud system or rate of change of the mud volume. In one embodiment, makeup mud is automatically added to the system as solids are removed from the mud. Abnormal conditions are indicated by when the rate of makeup mud addition differs from the rate of solids removal. The mud system is maintained at a substantially constant volume by means of tanks specially constructed to provide a small mud/air interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.