Fluid means for data transmission

Details Fluid means for data transmission Fluid means for data transmission

1988-09-22

1990-06-05

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

125 48, G01V 140

Patent

active

049320050

ABSTRACT:
A means to transmit recorded data through a fluid medium is disclosed. The preferred embodiment incorporates a positive displacement fluid pump having constant pressure pumping means connected to pump fluid through a drill string for drilling oil wells. A variable orifice means is located down hole in the drill string which changes orifice diameter responsive to sensed data. The pumped fluid is displaced by a pumping piston driven by a second piston powered by constant pressure hydraulic fluid. The pumped fluid is held at a constant pressure so that a change in orifice diameter will change the volume of the flow through the orifice and likewise change the volume of flow of the hydraulic drive fluid. The flow rate of the hydraulic drive fluid is thus gauged to thereby record the orifice diameter change and in turn receive signals transmitted by the change in orifice diameter.

REFERENCES:
patent: H55 (1986-05-01), Ramsey et al.
patent: 4694439 (1987-09-01), Moll
patent: 4774694 (1988-09-01), Moll

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