E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/12 (2006.01) E21B 47/18 (2006.01) G01V 1/40 (2006.01)
Patent
CA 2315981
In a borehole logging apparatus (1) for deep well drill- ings having a device for transmitting measured data obtained while drilling from a borehole through the drilling fluid to the earth's surface, there is arranged in the upper end of a housing (2) a signal transmitter (13) comprising a beaker- shaped rotor (24) and a stator sleeve (25) surrounding said rotor. Fluid impinges on the signal transmitter (13) through a central feed pipe (15) surrounded by an exchangeable bypass ring (14) to which the complete current of drilling fluid is routed through a filter pipe (3) and through which part of the drilling fluid current is routed back into the drill string (6). From a set of bypass rings (14) of different by- pass cross sections it is possible to select one suited for the particular on-site conditions and insert it into the logging apparatus (1) in order to obtain a significant signal through the signal transmitter (13).
Becfield Drilling Services Gmbh
Riches Mckenzie & Herbert Llp
Weatherford Energy Services Gmbh
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