Patent
Pulsed ultrasonic doppler borehole fluid measuring apparatus
John W. Minear,Randy Gold +1 more
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TLDR
In this paper, a measuring device for use in a producing well is described, which includes a sonde having upper and lower centralizers to define an annular flow space there around.Abstract:
A measuring device for use in a producing well is set forth It includes a sonde having upper and lower centralizers to define an annular flow space therearound In the preferred embodiment, a motor driven sensor preferably a piezoelectric combination transmitter and receiver is, included to transmit and then receive ultrasonic pulses They are transmitted downwardly from the housing into fluid flowing in the well Reflective interfaces are defined by material differences Gas bubbles droplets and particles in the fluid flow and phases between oil and water, etc form reflective interfaces to create a scattering effect to transmitted ultrasonic pulses so that a return pulse is formed The pulses encodes fluid flow velocity as a result of the Doppler shiftread more
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Ultrasonic measurement apparatus
Jacques Orban,James C. Mayes +1 more
TL;DR: In this paper, a method and apparatus for measuring standoff and borehole diameter in the presence of drilling cuttings entrained in the drilling fluid is described. But the method is based on the phase of oscillations of echo to identify large gas bubbles entries.
Patent
Device for sensing fluid behavior
TL;DR: In this paper, the authors proposed a method for determining the movement of multi-phase fluid in a downhole in a well using two or more spaced sensors, where the sensor data signals are compared to determine movement of the medium within the conduit and about the device.
Patent
Apparatus and method for measuring a borehole
TL;DR: In this paper, an apparatus and a method are provided for measuring the caliper of a borehole and the standoff of a drilling tool from the walls of the borehole during a drilling operation.
PatentDOI
Acoustic transducers for tubulars
TL;DR: In this article, the transducers are covered with a sealer in a liquid-free configuration and shields are used to protect them from acoustic energy excitation/signal reception.
Patent
Apparatus and methods of locating downhole anomalies
TL;DR: In this paper, the location and characteristics of multiple anomalies can be identified simultaneously in a well by using the Doppler effect, where each anomaly in the well produces reflections with different frequency, amplitude and phase information.
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Patent
System for detecting blow out and lost circulation in a borehole
TL;DR: In this article, a drilling mud flow rate detector, including a sub adapted for being positioned in the drill string, having a sonic signal generator located near the center of the sub in both the incoming and the return mud flow path, was presented.
Patent
Borehole ultrasonic flow meter
TL;DR: In this paper, an ultrasonic flow measuring device is used to calculate the rate of flow of material through various perforated intervals of a well casing as a function of depth, which is proportional to the difference in travel time of a pulse-type ultrasonic signal over a fixed distance in opposite directions through the fluid.
Patent
Method and apparatus for determining the flow characteristics of a fluid in a well
TL;DR: In this paper, the authors present a method and an approach for determining the flow CHARACTERISTICS of a fluid in a well using at least one vortex street generating obstacle placed transversely to the flow and a pressure transducer associated with the obstacle.
Patent
Method and apparatus for determining the flow characteristics of a fluid in a well
TL;DR: In this paper, the authors present a method for determining the flowrate of a fluid flowing in a well comprising the steps of lowering in the well a logging sonde comprising at least one vortex street generating obstacle and a transducer responsive to pressure variations due to the generation of vortices.