Side pocket mandrel pressure measuring system

Details Side pocket mandrel pressure measuring system Side pocket mandrel pressure measuring system

1993-10-28

1995-10-17

Chilcot, Jr., Richard E.

Measuring and testing

Borehole or drilling

Downhole test

73728, 3408546, E21B 2303

Patent

active

054579880

ABSTRACT:
A system for providing D.C. power at the earth's surface to a downhole well tool in a case hardened side pocket mandrel using an inductive coupling system where the mandrel has a pressure sealed probe member sealingly attached in a side pocket of the mandrel. The probe member extends externally to a cable conductor and is enclosed in a protective housing. A surface located D.C. power source is connected by the cable to a downhole square wave oscillator with a full wave driver to power an inductive coil in the probe member. The end socket of the tool has an inductive coil connected to a full wave rectifier in the tool for providing power to the tool. Pressure sensors in the tool are used to develop frequency shifted key signals to the cable via the inductive coils which provide a digital current modulation and which is detected at the earth's surface.

REFERENCES:
patent: 3209323 (1965-09-01), Grossman
patent: 4333527 (1982-06-01), Higgins et al.
patent: 4806928 (1989-02-01), Verneruso
OTC Paper 5920, May 1989, A Downhole Electrical Wet-Connection System-For Delivery And Retreival of Monitoring Instruments By Wireline.
Data Latch System Brochure, Sep. 1989.

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