EP 0026706 B1 19840912 - PROCESS AND DEVICE FOR DETERMINING THE DIRECTIONAL PARAMETERS OF A CONTINUOUSLY EXPLORED WELL
Title (en)
PROCESS AND DEVICE FOR DETERMINING THE DIRECTIONAL PARAMETERS OF A CONTINUOUSLY EXPLORED WELL
Publication
Application
Priority
FR 7924029 A 19790927
Abstract (en)
[origin: US4362054A] Method and apparatus for continuously determining direction parameters of a borehole from the position of a well logging tool in the borehole during tool movement in the borehole, comprise a well logging tool including an accelerometer and a direction indicator, such as a magnetometer, with three sensitive axes respectively. Output signals derived from the accelerometer are prefiltered and then combined with respective output signals derived from the direction indicator in a manner so as to reduce to negligible proportions the effects of tool motion on respective ones of the output signals. The resulting signal is then subjected to a selective low-pass filtering, and the components thereof are thereafter, respectively combined with corresponding, suitable components of the original output signals in a manner such as to derive direction parameters for the borehole.
IPC 1-7
IPC 8 full level
E21B 47/022 (2012.01)
CPC (source: EP US)
E21B 47/022 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0026706 A1 19810408; EP 0026706 B1 19840912; AU 538777 B2 19840830; AU 6201180 A 19810402; BR 8006088 A 19810407; CA 1163325 A 19840306; DE 3069162 D1 19841018; FR 2466607 A1 19810410; FR 2466607 B1 19850719; MX 148779 A 19830614; NO 154439 B 19860609; NO 154439 C 19860917; NO 802684 L 19810330; OA 06629 A 19810831; US 4362054 A 19821207
DOCDB simple family (application)
EP 80401361 A 19800925; AU 6201180 A 19800903; BR 8006088 A 19800923; CA 359426 A 19800902; DE 3069162 T 19800925; FR 7924029 A 19790927; MX 18408480 A 19800925; NO 802684 A 19800910; OA 57221 A 19800927; US 18942180 A 19800922