Pulser
AssigneeBaker Hughes Incorporated
InventorWoodrow Gondron
Life of this patent
Estimating the term…
Abstract
A pulser providing pressure based accoustic telemetry in a fluid column includes a formed turbine and valve wheel moveable as one unit, an aft turbine configured to drive the valve wheel and a brake to inhibit movement of the aft turbine. During periods when the aft turbine is slowed relative to the formed turbine and valve wheel, the aft turbine blocks misalign with blades of the valve wheel inhibiting fluid flow therepast. A pressure buildup is caused hereby until the brake is released allowing the aft turbine blades to realign with the valve wheel by resuming speed rotation thereby terminating pressure buildup.
Claims27
A pulser comprising:
- a first turbine;
- a valve wheel connected to said first turbine;
- a second turbine selectively rotatable relative to said first turbine;
- and
- a brake selectively actuatable to slow rotation of one of said first turbine or said second turbine relative to the other of said first turbine or said second turbine.
A pulser comprising:
- a first valve wheel driven by a first turbine;
- a second valve wheel driven by a second turbine, said first valve wheel and said second valve wheel being rotatable in an aligned configuration and selectively rotatably relative to each other to assume a misaligned configuration.
A method for pulsing in fluid column comprising:
- spinning a two turbine system having a flow restrictor in an aligned condition;
- braking one of the two turbines to misaligned said system causing a flow restriction;
- and
- allowing said system to realign relieving said flow restriction.
A method for communicating through a fluid column comprising:
- spinning a two turbine system having a flow restrictor in an aligned condition;
- braking one of the two turbines to misaligned said system causing a flow restriction;
- allowing said system to realign relieving said flow restriction;
- and
- repeating said braking and allowing a number of times to create a message.
Dependencies are inferred from the claim text.