Compensated blast joint for oil well production tubing
US4211440A · kind A · utility
21Cited by
7References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jan 3, 1977 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Jan 3, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/085
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Means is provided in a blast joint, for an oil well, whereby the elements of the blast joint are designed and organized to overcome adverse external conditions encountered in the installation of the joint, as well as those encountered in the operation of the joint in the well, to maintain the structure and operability of the blast joint in a condition favorable to its effectiveness in protecting the production tubing from erosion at its production location in the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.