Telemetry wave detection apparatus and method

Details Telemetry wave detection apparatus and method Telemetry wave detection apparatus and method

2011-04-19

2011-04-19

Wong, Albert K (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S856300, C356S498000, C356S486000

Reexamination Certificate

active

07928861

ABSTRACT:
Non-contacting means of measuring the material velocities of harmonic acoustic telemetry waves travelling along the wall of drillpipe, production tubing or coiled tubing are disclosed. Also disclosed are contacting means, enabling measurement of accelerations or material velocities associated with acoustic telemetry waves travelling along the wall of the tubing, utilizing as a detector either a wireless accelerometer system or an optical means, or both; these may also be applied to mud pulse telemetry, wherein the telemetry waves are carried via the drilling fluid, causing strain in the pipe wall that in turn causes wall deformation that can be directly or indirectly assessed by optical means.The present invention enables detection of telemetry wave detection in space-constrained situations. The invention also teaches a substantially contactless method of determining the time-based changes of the propagating telemetry waves. A final benefit of the present invention is that it demonstrates a particularly simple contacting means of directly measuring wall movements in live coiled tubing drilling environments.

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Young, Warren C. and Richard G. Budynas, Roark's Formulas for Stress and Strain, p. 592, Section 13.8 Tables, Table 13.1, Case 1., 7thEdition, McGraw-Hill.
Office Action from Canadian Intellectual Property Office, for Canadian Patent Application No. 2,584,841, dated Jul. 29, 2010.

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