Hydraulic oscillator for use in a transmitter valve
First Claim
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1. A transmitting element in a flowing fluid comprising:
- a. a pulser including;
i. a first chamber for enclosing a flow of fluid;
ii. a second chamber within the first chamber defined by a driver piston;
iii. a poppet coupled to and driven by the driver piston for regulating the flow in the first chamber; and
b. a bistable valve assembly between the second chamber and an outlet port, the bistable valve assembly comprising;
i. a bistable valve element;
ii. a sense element sensing the pressure within the second chamber; and
iii. a toggle mechanism actuated by the sense element for determining a first position for the bistable valve at a lower pressure with the second chamber and a second position for the bistable valve element at a higher pressure within the second chamber.
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Abstract
An oscillating valve driven by the pressure in a mud pulser develops a pressure variation in the mud pulse signal that is at a frequency that is different than the frequencies of the mud system. The oscillating valve is coupled to or integral with the pulse drive cylinder, whether the drive means for operation of the pulser is upstream or downstream from the orifice. A bistable valve improves performance of the transmitting element at low flow rates by providing a toggle mechanism which assures positive seating of the bistable valve.
32 Citations
9 Claims
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1. A transmitting element in a flowing fluid comprising:
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a. a pulser including; i. a first chamber for enclosing a flow of fluid; ii. a second chamber within the first chamber defined by a driver piston; iii. a poppet coupled to and driven by the driver piston for regulating the flow in the first chamber; and b. a bistable valve assembly between the second chamber and an outlet port, the bistable valve assembly comprising; i. a bistable valve element; ii. a sense element sensing the pressure within the second chamber; and iii. a toggle mechanism actuated by the sense element for determining a first position for the bistable valve at a lower pressure with the second chamber and a second position for the bistable valve element at a higher pressure within the second chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification