Rate gyro wells survey system including nulling system
US5806195A · kind A · utility
39Cited by
9References
60Claims
0Family size
Inventors
Key dates
| Filing date | Jun 17, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Jun 17, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for well borehole survey is set out. A sonde supports X and Y accelerometers and X and & sensors on a rate gyro having a Z axis aligned with the sonde. On a slickline, or within a drill string, the sonde is used to measure four variables, these being G.sub.x and G.sub.y, A.sub.x and A.sub.z. This enables well azimuth and inclination to determined. Measuring depth enables a survey to be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.