Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1994-01-25
1996-06-25
O'Shea, Sandra L.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
343719, 343789, G01V 310, H01Q 104, H01Q 708
Patent
active
055303587
ABSTRACT:
A method and apparatus is provided for measurement-while-drilling utilizing improved antennas. An elongated tubular member is provided with an outer peripheral surface having a contoured portion defining a plurality of discrete communication regions of reduced radial dimension. An antenna pathway is defined in the elongated member substantially transverse to the plurality of discrete communication regions. An antenna member is partially disposed in the antenna pathway with portions of the antenna member extending out of the elongated member at the plurality of discrete communication regions to facilitate communication of electromagnetic energy. In a reception mode of operation, the antenna member detects electromagnetic energy in the wellbore and generates a current corresponding thereto. If operated in a transmission mode of operation, the antenna member emits electromagnetic energy in the wellbore in response to an energizing current. Preferably, the plurality of discrete communication regions are circumferentially disposed about the elongated member. Means is provided for preferentially communicating electromagnetic energy with particular portions of the antenna member which are disposed in the plurality of discrete communication regions. In one particular embodiment, a plurality of electrically-operable magnetic circuit elements are provided for communicating with particular ones of the plurality of discrete communication regions of the antenna member, for altering antenna gain in response to at least one control signal.
REFERENCES:
patent: Re32913 (1989-04-01), Clark
patent: 3273152 (1966-09-01), Earp
patent: 3584293 (1971-06-01), Lizuka
patent: 4312003 (1982-01-01), Robbins, Jr.
patent: 4511842 (1985-04-01), Moran et al.
patent: 4511843 (1983-04-01), Thoraval
patent: 4578675 (1986-03-01), MacLeod
patent: 4689572 (1987-08-01), Clark
patent: 4697190 (1987-09-01), Oswald
patent: 4766442 (1988-08-01), Issenmann
patent: 4785247 (1988-11-01), Meador et al.
patent: 4940943 (1990-07-01), Bartel et al.
patent: 5014071 (1991-05-01), King
patent: 5081419 (1992-01-01), Meador et al.
patent: 5138263 (1992-08-01), Towle
patent: 5157331 (1992-10-01), Smith
patent: 5212495 (1993-05-01), Winkel et al.
Paluch William C.
Thompson Larry W.
Wisler Macmillan M.
Baker Hughes Incorporated
Hunn Melvin A.
O'Shea Sandra L.
Phillips Roger
LandOfFree
Method and apparatus for measurement-while-drilling utilizing im does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measurement-while-drilling utilizing im, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measurement-while-drilling utilizing im will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2191932