EP 3294989 B1 20190724 - POWER LOSS DYSFUNCTION CHARACTERIZATION
Title (en)
POWER LOSS DYSFUNCTION CHARACTERIZATION
Title (de)
CHARAKTERISIERUNG VON LEISTUNGSVERLUSTDYSFUNKTION
Title (fr)
CARACTÉRISATION DE DYSFONCTIONNEMENT À PERTE DE PUISSANCE
Publication
Application
Priority
- US 201562160886 P 20150513
- US 2016031864 W 20160511
Abstract (en)
[origin: CN107709702A] The invention relates to a method, system and apparatus for determining real-time drilling operations dysfunctions by measuring the power-loss of signal propagation associated with a drill string in awellbore. The invention comprises acquiring a first time series from a mid-string drilling sub sensor associated with a drill string in a wellbore and acquiring a second time series from a sensor associated with the drill string wherein the sensor is on or near a drill rig on the surface of the earth. The process further comprises determining the geometry of the wellbore and determining model parameters alpha and beta for characterizing a wellbore using the first time series, the second time series and the geometry of the wellbore by deriving a power loss of signal propagation. The model parameters may then be used for drilling a subsequent well using surface sensor acquired data to detect drilling dysfunctions.
IPC 8 full level
E21B 7/04 (2006.01); E21B 44/04 (2006.01); E21B 47/12 (2012.01); E21B 47/16 (2006.01); G01V 3/38 (2006.01)
CPC (source: EP US)
E21B 44/04 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
CN 107709702 A 20180216; CN 107709702 B 20210903; EP 3294989 A1 20180321; EP 3294989 A4 20180523; EP 3294989 B1 20190724
DOCDB simple family (application)
CN 201680039483 A 20160511; EP 16793454 A 20160511