Redundant metal-metal seal

Details Redundant metal-metal seal Redundant metal-metal seal

2001-12-18

2004-06-22

Miller, William L. (Department: 3677)

Seal for a joint or juncture

Seal for well apparatus

C277S377000, C277S342000, C166S118000

Reexamination Certificate

active

06752397

ABSTRACT:

FIELD OF THE INVENTION
The subject matter of the present invention relates to providing redundant metal—metal seals to protect downhole communication lines from the surrounding environment.
BACKGROUND OF THE INVENTION
Communication lines are used in a wide range of applications in the oilfield industry. The communication lines transmit monitored data regarding downhole conditions such as temperature and pressure to surface instrumentation. The communication lines can also be used to send information down the well from the surface. Additionally, communication lines may also be used to electrically power downhole equipment. Communication lines may include electrical conduits, optical fibers, hydraulic lines and other methods for data or power transmission.
In environments such as those encountered in downhole wells, the communication lines are exposed to hostile conditions such as elevated temperatures and pressures. To protect the fragile communication lines from the hostile conditions, the communication lines are generally carried within protective tubing that provides an environmental seal. Problems arise when the seal must be broken during assembly, installation and/or repair of the communication line. For example, in downhole applications, in order for the communication line to be fed through production equipment such as packers, the line must be cut and then spliced with the downstream line. Thus, after splicing, the communication line must once again be sealed from the harsh environment.
There exists, therefore, a need for an apparatus and method of sealing communication lines from the surrounding environment.


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SPE Paper 55996. Rusch, David W. et al., “Use of Pressure Activated Sealants to Cure Sources of Casing Pressure,” (Anchorage, Alaska; May 1999).
SPE Paper 59026. Mendoza, Miguel A. et al., “Leak-Sealant in Hydraulic Systems Minimizes Maintenance Costs in Offshore Wells,” (Villhermosa, Mexico; Feb. 2000).
SPE Paper 64400. Eaton, M.L. et al., “New Workover and Completion Technology Utilized in Bass Strait,” (Brisbane, Australia; Oct. 2000).

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