Back to results
US 2006/0131014 A1Published application
Borehole communication and measurement system
AssigneeSchlumberger Technology Corporation
InventorsSongming Huang, Franck Monmont, Robert Tennent, Randolph Sheffield
Life of this patent
Estimating the term…
Abstract
A technique that is usable with a well includes using at least one downhole sensor to establish telemetry within the well. The sensor(s) are used as a permanent sensing device.
Claims52
A method usable with a well, comprising:
- using at least one downhole sensor to establish telemetry within the well;
- and
- using said at least one sensor as a permanent sensing device.
A system usable with a subterranean well, comprising:
- at least one sensor;
- a downlink circuit coupled to said at least one sensor to use said at least one sensor to receive a command communicated from a surface of the well;
- and
- an uplink circuit coupled to said at least one sensor to communicate a well condition sensed by the sensor uphole.
1 more element
A method usable with a well, comprising:
- encoding a first code sequence with a synchronization code to produce a second code sequence;
- and
- generating a stimulus in fluid of the well to communicate the second code sequence downhole.
A method usable with a well, comprising:
- receiving a code sequence indicative of information to be communicated downhole;
- modulating the code sequence to remove a portion of spectral energy of the code sequence located near zero frequency to create a signal;
- and
- generating a stimulus in fluid of the well to communicate the signal downhole.
1 more element
A method usable with a well, comprising:
- decoding a flow signal downhole to generate a first code sequence;
- decoding a pressure signal downhole to generate a second code sequence;
- and
- selectively combining the first code sequence and the second code sequence to generate a third code sequence indicative of information communicated downhole.
1 more element
A system usable with a well, comprising:
- an uplink modulator located downhole in the well to modulate a carrier stimulus to generate a second stimulus transmitted uphole indicative of a downhole measurement;
- and
- a downlink module adapted to decode a flow signal communicated from the surface of the well and a pressure signal communicated from the surface of the well and selectively combine the decoded flow and pressure signals to provide a command for a downhole tool.
A system usable with a well, comprising:
- an encoder to encode a first code sequence with a synchronization code to generate an encoded code sequence;
- and
- a stimulus generator to generate a stimulus in fluid of the well to communicate the encoded code sequence downhole.
A system usable with a well, comprising:
- a modulator to receive a code sequence indicative of information to be communicated downhole and modulate the code sequence to remove a portion of spectral energy of the code sequence located near zero frequency to create a signal;
- and
- stimulus generator to generate a stimulus in fluid of the well to communicate the modulated code sequence downhole.
A downhole receiver usable with a well, comprising:
- a flow signal detector adapted to decode a flow signal downhole to generate a first code sequence;
- a pressure signal detector adapted to decode a pressure signal downhole to generate a second code sequence;
- and
- a combiner to selectively combine the first code sequence and the second code sequence to generate a third code sequence indicative of information communicated from a surface of the well.
1 more element
Dependencies are inferred from the claim text.