Multiple conduit drill pipe
US4522234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Pipe comprising intermediate tube radially spaced between outer and inner tubes, a support adjacent one end of inner tube fixedly mounting intermediate tube to outer and inner tubes and a shock mount adjacent the other end of intermediate tube fixedly attached to the intermediate tube positioning intermediate tube between inner and outer tubes and including a resilient part providing for limited relative axial and rotational movement between intermediate tube and outer tube at said second support, said resilient part having lower modulus of elasticity than said first support and being elastomeric to damp out relative rotational vibrations of said tubes through its internal friction, threaded portions on ends of outer tube for making mechanical connection with correlative threaded portions on ends of outer tube of similar pipe, telescopic portions on ends of intermediate tube for making fluid conducting connection with correlative portions on ends of intermediate tube of similar pipe, pin and socket on ends of inner tube for making electrical connection with correlative socket and pin on ends of inner tube of similar pipe, and electric conduit within inner tube connecting said pin a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.