Threaded joint for oil well pipes
US5419595A · kind A · utility
54Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Apr 23, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A threaded joint for oil well pipes has excellent leak-tightness and a high disconnect torque and can withstand repeated make-ups. At the time of make-up, the load flanks (1) of the male and female threads contact each other, either the crest surfaces (3) or the root surfaces (4) are contacting and the other of the two pairs of surfaces has a gap, and a gap of at most 0.03 mm exists between the stab flanks (2) of the male and female threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.