EP 0172452 B1 19880127 - APPARATUS FOR TRANSMITTING INFORMATION FROM A WELL TO THE SURFACE DURING DRILLING
Title (en)
APPARATUS FOR TRANSMITTING INFORMATION FROM A WELL TO THE SURFACE DURING DRILLING
Publication
Application
Priority
DE 3428931 A 19840806
Abstract (en)
[origin: US4698794A] In a device for the transmission of information from a borehole to the surface during the operation of a drilling device which comprises a rotary drill bit, a tubular housing and a pump which delivers a drilling fluid downwards through the tubular housing, through the rotary drill bit and upwards in the annular space between the tubular housing and the borehole, there is provided a detector arranged in the tubular housing, for detecting information, a processor for converting that information into a sequence of electrical control signals and a transducer for generating pressure pulses in the downwardly-directed flow of drilling fluid as a function of the control signals, and a remote detector arranged at a position spaced from the processor by a wire-less transmission path with a transmitter unit associated with the remote detector at one end of said path and a receiver unit at the other end of said path.
IPC 1-7
IPC 8 full level
E21B 4/02 (2006.01); E21B 47/18 (2012.01)
CPC (source: EP US)
E21B 4/02 (2013.01 - EP US); E21B 47/18 (2013.01 - EP US); E21B 47/20 (2020.05 - EP US)
Designated contracting state (EPC)
BE FR GB IT NL SE
DOCDB simple family (publication)
DE 3428931 C1 19850605; CA 1235313 A 19880419; EP 0172452 A1 19860226; EP 0172452 B1 19880127; JP S6149096 A 19860310; US 4698794 A 19871006
DOCDB simple family (application)
DE 3428931 A 19840806; CA 487273 A 19850723; EP 85109490 A 19850727; JP 17126785 A 19850805; US 75771185 A 19850722