Subsurface signal transmitting apparatus
US6405795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The subsurface signal transmitting apparatus (10) including an insulation coupler (11), a carrier device (12) for mounting the telemetry instrumentation (75), and a by-pass system for avoiding pressure build-up either above or below the apparatus. The insulation coupler (11) includes a housing member (13) having a central opening (16) defined by an interior surface (22) extending in the longitudinal direction and a mandrel member (14) having an exterior surface (32) spaced from the interior surface (22) of the housing member (13) to provide a gap or clearance (33) with an insulating bonding material (29) occupying the clearance. The surfaces are oriented so that when the coupling is in tension at least a portion of the two surfaces that when the coupling is in tension at least a portion of the two surfaces experience interacting forces towards each other in he longitudinal direction of the coupling and in event of failure of the bonding material, the mandrel member is unable to withdraw from the housing member. The by-pass system includes a by-pass tube (120) which extends through central openings (2, 61) of the insulation coupler (11) and carrier device (12) and provides for elect…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.