US 12,442,290 B2
Compressing data collected downhole in a wellbore
Oliver Mohnke, Celle (DE); Yuri Vatis, Hannover (DE); Martin Errenst, Hannover (DE); and Holger Tietjen, Hannover (DE)
Assigned to BAKER HUGHES OILFIELD OPERATIONS LLC, Houston, TX (US)
Filed by Baker Hughes Oilfield Operations LLC, Houston, TX (US)
Filed on Apr. 26, 2023, as Appl. No. 18/307,190.
Application 18/307,190 is a continuation of application No. 16/899,239, filed on Jun. 11, 2020, granted, now 11,649,719.
Claims priority of provisional application 62/860,358, filed on Jun. 12, 2019.
Prior Publication US 2023/0265757 A1, Aug. 24, 2023
Int. Cl. E21B 47/12 (2012.01); E21B 44/00 (2006.01); E21B 47/26 (2012.01); G05B 19/042 (2006.01); H04N 19/176 (2014.01); H04N 19/51 (2014.01)
CPC E21B 47/12 (2013.01) [E21B 44/00 (2013.01); E21B 47/26 (2020.05); G05B 19/042 (2013.01); H04N 19/176 (2014.11); H04N 19/51 (2014.11); G05B 2219/21109 (2013.01); G05B 2219/25258 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for transmitting data from a downhole location to the earth's surface, the method comprising:
conveying a drilling assembly to the downhole location, the drilling assembly including a drill bit to penetrate an earth formation and one or more sensors;
sensing, with the one or more sensors, sensor data downhole, the sensor data comprising a plurality of data value sets, wherein the plurality of data value sets comprise a first data value set associated with a first data value set label and a second data value set associated with a second data value set label, wherein the first data value set label and the second data value set label refer to at least one of: (i) an operating frequency of the one or more sensors; and (ii) a transmitter-receiver distance of the one or more sensors;
assigning at least one data value of each of the plurality of data value sets to each of a plurality of time levels or depth levels to generate a data block;
compressing, with a first processor in the drilling assembly, the data block by a block-based compression technique to generate compressed data;
transmitting, with a telemetry system in the drilling assembly, the compressed data from the downhole location to the earth's surface;
decompressing, with a second processor at the earth's surface, the compressed data to generate decompressed data values; and
controlling the drilling assembly based on the decompressed data values.