Pipe configuration compatible with CBL
US4607698A · kind A · utility
8Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1985 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Jan 25, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A string of pipe is provided with intermittent coatings of grit-like materials bonded to the pipe to provide a rough surface for adhesion of cement in a cementing operation. Between the intermittent coatings are intermittent bare portions of pipe thereby to permit the use of a cement bonding tool. The spacings of the coatings is functionally related to the transmitter/receiver spacing for a cement bonding tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.