Well flow measuring apparatus

摘要

In the representative embodiment of the apparatus of the present invention disclosed herein, a plurality of outwardly-biased bow springs are disposed around the lower end of the body of a spinner-type flowmeter and cooperatively arranged for centering at least that portion of the tool body in a well bore. The upper ends of the bow springs are pivotally secured to the tool body and their lower ends are coupled together below the body and adapted for longitudinal movement in relation thereto. To maintain the bow springs at a uniform spacing from the tool body when the flowmeter is in a deviated well bore, a corresponding number of rigid arms are pivotally coupled to the mid-portion of each spring and extended upwardly to a pivotal connection on a downwardly-biased collar which is slidably mounted on the tool body below the spring pivots. The spinner is provided with pivoted blades which are cooperatively arranged to be extended and retracted in response to the expansion and contraction of the bow springs.