Drill string components resistant to jamming
US9810029B2 · kind B2 · utility
7Cited by
24References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2012 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | May 18, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Drill string components having a thread extending around a body that have a configuration that resists jamming and cross-threading. A leading end of the thread includes a planar surface normal to the body that provides an abrupt transition to full thread depth to help reduce or eliminate cross-threading. When complementary male and female threads are similarly structured, the mating threads slide together along an interface at the thread start face and are drawn into a fully thread-coupled condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.