Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate
2006-07-04
2006-07-04
Edwards, Jr., Timothy (Department: 2635)
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
C340S854400, C340S854500, C175S040000
Reexamination Certificate
active
07071837
ABSTRACT:
Data transmission in pipeline systems A first set of apparatus is arranged for transmitting data from a point in a cased section of a well1, 3to a remote location. The apparatus may be used as a relay station6to increase operational depth. Signals are applied to and received from the string1at the relay station6and a selected length of the string1is provided with insulating spacer means9on either side of the relay station to ensure that the string1and casing3are effectively isolated for a selected minimum distance. This enables potential differences to be both applied to and detected from the string1, thus allowing data transmission and reception. A second set of apparatus is arranged for transmitting from an internal unit408inside a cased section of the well401, 403to the immediate surrounding area outside the casing403. The internal unit408injects current into the string401. A toroid415which surrounds the casing403is provided to pick up signals. Spaced connections between the string401and casing403are provided by conductive packers411. A mismatch in the current flowing in the string401and casing403is generated so that a non-zero flux is seen by the toroid and hence a signal can be received.
REFERENCES:
patent: 2364957 (1944-12-01), Douglas
patent: 3129394 (1964-04-01), Long
patent: 3150321 (1964-09-01), Summers
patent: 3333239 (1967-07-01), Silverman
patent: 3697940 (1972-10-01), Berka
patent: 3831138 (1974-08-01), Rammner
patent: 4525715 (1985-06-01), Smith
patent: 4684946 (1987-08-01), Issenmann
patent: 4785247 (1988-11-01), Meador et al.
patent: 4845494 (1989-07-01), Hanson et al.
patent: 5130706 (1992-07-01), Van Steenwyk
patent: 5189415 (1993-02-01), Shimada et al.
patent: 5394141 (1995-02-01), Soulier
patent: 5396232 (1995-03-01), Mathieu et al.
patent: 5512889 (1996-04-01), Fletcher
patent: 5576703 (1996-11-01), MacLeod et al.
patent: 5883516 (1999-03-01), Van Steenwyk et al.
patent: 5945923 (1999-08-01), Soulier
patent: 6515592 (2003-02-01), Babour et al.
patent: 0 295 712 (1988-12-01), None
patent: 0 646.304 (1995-04-01), None
patent: 0 816 632 (1998-01-01), None
patent: 0 995 877 (2000-04-01), None
patent: 1 130 418 (2001-09-01), None
patent: 2.205.996 (1974-05-01), None
patent: WO93/26115 (1993-12-01), None
patent: WO 98/06924 (1998-02-01), None
patent: WO 99/08035 (1999-02-01), None
patent: WO99/37044 (1999-07-01), None
R. Magliona et al., “Electromagnetic Transmission Improvements Applied to On/offshore Drilling in the Mediterran an Area,” Feb. 1194.
L. Soulier et al., “E.M. MWD Data Transmission Status and Perspectiv s,” paper prepared for pres ntation at 1993 SPE/IADC Drilling conference held in Amsterdam Feb. 23-25, 1993.
Second-generation MWD tool'< Oil and Gas Journal, Feb. 1983.
H. Yasuharu, “Data Transmission System,” Patent Abstracts of Japan of JP Pub No. 57026942 (Feb. 13, 1982).
I. Takashi, “Method and Device for Underwater Signal Transmission”, Patent Abstracts of Japan of JP 56078240, filed Jun. 27, 1981.
Hudson Steven Martin
Joinson Daniel
Edwards, Jr. Timothy
Expro North Sea Limited
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
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