Well testing tool system

E - Fixed Constructions – 21 – B

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E21B 23/02 (2006.01) E21B 33/129 (2006.01) E21B 47/00 (2006.01) E21B 47/01 (2006.01)

Patent

CA 1093458

647-2041G HMG:em WELL TESTING TOOL SYSTEM Abstract of the Disclosure A well testing tool system for isolating upper and lower portions of a well bore and communicating a well con- dition such as pressure, temperature, fluid velocity, and the like to a measuring device. The system includes a wire- line 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 absor- ber, 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 pro- vides for pressure equalization across the tool train during installation and removal and absorbs shock to protect the measuring device. This invention relates to well tools and more particularly relates to a well tool system for isolating lower and upper portions of a well bore and measuring an operating condition within the lower portion of the well bore.

314798

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