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US 11,029,433 B2Granted
Calibration of streamer navigation equipment
AssigneePGS Geophysical AS
InventorsMatthew Eric Lyssy, Mattias Südow, Toralf Lund, Andre Stenzel
Life of this patent
Estimating the term…
Abstract
An apparatus can include a base assembly and a pivot assembly coupled to the base assembly. The apparatus can include a carriage coupled to the pivot assembly. The carriage can be shaped to receive a compass streamer telemetry unit (CSTU). The carriage can be configured to secure the CSTU. The pivot assembly can be rotatably coupled to the base assembly to adjust a pitch of the carriage. The carriage can be rotatably coupled to the pivot assembly to adjust roll of the carriage.
Claims9
A non-transitory computer-readable medium storing instructions executable by a processor to:
- receive a first set of telemetry calibration data points associated with a first set of positions of a compass, wherein reception of the first set of telemetry calibration data points occurs during adjustment of a carriage to a first plurality of roll positions using a roll wheel and the carriage is configured to receive the compass, and the first set of positions is associated with a fixed first pitch and the first plurality of roll positions;
- compare the first set of telemetry calibration data points to a first expected telemetry field shape corresponding to the first set of positions;
- receive a second set of telemetry calibration data points associated with a second set of positions of the compass, wherein reception of the second set of telemetry calibration data points occurs during adjustment of the carriage to a second plurality of roll positions using the roll wheel, and the second set of positions is associated with a fixed second pitch and the second plurality of roll positions;
- compare the second set of telemetry calibration data points to a second telemetry field shape corresponding to the second set of positions;
- and
- generate a set of calibration values for the compass based on the comparisons of the first and the second sets of telemetry calibration data points to the first and the second expected telemetry field shapes.
3 more elements
A method, comprising:
- mounting a compass in a carriage, wherein the carriage is configured to be coupled to a roll wheel and to a pivot wheel such that a roll of the carriage is determined by the roll wheel and a pitch of the carriage is determined by the pivot wheel;
- receiving a first set of telemetry data points associated with a first set of positions of the compass, wherein the first set of telemetry data points is received while maintaining a fixed first pitch of the carriage and using the roll wheel to adjust the roll of the carriage to a first plurality of roll positions, wherein the fixed first pitch is maintained by locking the pivot wheel;
- adjusting the first pitch of the carriage to a second pitch by unlocking the pivot wheel, rotating the pivot wheel, and relocking the pivot wheel in response to the carriage being at the second pitch;
- and
- receiving a second set of telemetry data points associated with a second set of positions of the compass, wherein the second set of telemetry data points is received while maintaining the second pitch of the carriage fixed and using the roll wheel to adjust the roll of the carriage to a second plurality of roll positions.
2 more elements
A system, comprising:
- a base assembly;
- a pivot assembly rotatably coupled to the base assembly and to a pivot wheel where the pivot wheel adjusts a pitch of a carriage, wherein the pivot wheel comprises a first fastening mechanism and the first fastening mechanism is configured to lock the pivot assembly in a particular first position;
- the carriage housing a compass and rotatably coupled to the pivot assembly and to a roll wheel where the roll wheel adjusts a roll of the carriage, wherein the roll wheel comprises a second fastening mechanism and the second fastening mechanism is configured to lock the carriage in a particular second position;
- a non-transitory computer-readable medium in communication with a processor and storing instructions executable by the processor to:
- receive a set of telemetry calibration data points associated with a set of positions of the compass;
- compare the set of telemetry calibration data points to an expected telemetry field shape corresponding to the set of positions;
- and
- determine an accuracy value of the set of telemetry calibration data points in comparison to the expected telemetry field shape.
5 more elements
Dependencies are inferred from the claim text.