Well testing tool system

Details Well testing tool system Well testing tool system

1977-12-27

1979-04-17

Novosad, Stephen J.

Wells

Combined

166334, 166237, 166 64, E21B 2302, E21B 4700, E21B 4706

Patent

active

041495934

ABSTRACT:
A well testing tool system for isolating upper and lower portions of a well bore and communicating a well condition such as pressure, temperature, fluid velocity, and the like to a measuring device. The system includes a wireline supported tool train and a locking sub connectible on a removable lock mandrel adapted to be landed and locked in a landing nipple of a well tubing for releasably locking the tool train in operating position in a well bore. The tool train includes a locking probe releasably connectible at a lower end in the locking sub, an adjustable probe mandrel connected with the probe, an equalizing valve and shock absorber, and a gauge for measuring an operating condition in the well connected with the equalizing valve. The locking sub permits insertion of the probe at a relatively low force and requires a substantially larger force for withdrawal of the probe. Additionally, the locking sub grips the probe with a force directly proportional to the pressure differential applied across the locking sub preventing a high pressure below the locking sub from releasing and forcing the tool train up the well bore. The equalizing valve and shock absorber provides for pressure equalization across the tool train during installation and removal and absorbs shock to protect the measuring device.

REFERENCES:
patent: 3115188 (1963-12-01), Cochran et al.
patent: 3363696 (1968-01-01), Berryman
patent: 3581819 (1971-06-01), Tamplen
patent: 3791445 (1974-02-01), True
patent: 3815675 (1974-06-01), Peters
patent: 3901333 (1975-08-01), Mori
patent: 4069865 (1978-01-01), Gazda et al.
patent: 4076077 (1978-02-01), Nix et al.

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