RF coaxial transmission line having a two-piece rigid outer conductor for a wellbore and related methods

摘要

A rigid radio frequency (RF) coaxial transmission line to be positioned within a wellbore in a subterranean formation may include a series of rigid coaxial sections coupled together in end-to-end relation. Each rigid coaxial section may include an inner conductor, a rigid outer conductor surrounding the inner conductor, and a dielectric therebetween. Each of the rigid outer conductors may include a rigid outer layer having opposing threaded ends defining overlapping mechanical threaded joints with adjacent rigid outer layers. Each of the rigid outer conductors may also include an electrically conductive inner layer coupled to the rigid outer layer and having opposing ends defining electrical joints with adjacent electrically conductive inner layers.

主权项

1. A rigid radio frequency (RF) coaxial transmission line comprising:
a series of rigid coaxial sections coupled together in end-to-end relation, each rigid coaxial section comprising an inner conductor, a rigid outer conductor surrounding said inner conductor, and a dielectric therebetween; each of said rigid outer conductors comprising
a rigid outer layer having opposing threaded ends defining overlapping mechanical threaded joints with adjacent rigid outer layers, andan electrically conductive inner layer lining and in contact with said rigid outer layer and having opposing ends defining electrical joints with adjacent electrically conductive inner layers.