Wireline tool cable head overload apparatus
US4928764A · kind A · utility
7Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Sep 20, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A logging tool cable head for supporting the sonde on a cable is disclosed. It has an upper end which affixes to the cable and a lower end affixed to the sonde. The lower end supports an inwardly directed electrical grounding contact. The upper end supports a rotatable, indexed cam having facing upper and lower shoulders sized and located to bear against the contact, so that electrical contact is indicated on overloading. Indexing of the shoulders relative to the contact is achieved. There is also an adjustable centering spring system which locates the contact relative to the two shoulders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.