公开(公告)号：US09945207B2

公开(公告)日：2018-04-17

申请号：US14174575

申请日：2014-02-06

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Xiaoqi Bao ,  Mircea Badescu ,  Stewart Sherrit ,  Jeffery L. Hall ,  Yoseph Bar-Cohen

IPC: E21B34/10

CPC classification number: E21B34/10 ,  Y10T137/0368 ,  Y10T137/7738

Abstract: A flow control valve for use in oil well bore holes. The flow control valve includes a plurality of flow paths connected in parallel. The flow control valve operates by successively opening different flow paths, starting with a flow path that requires a reduced force to operate its inlet valve. The flow rate through the flow control valve is controlled by opening and closing different ones of the plurality of flow paths individually or in combination. A flow path that allows fluid to flow at substantially the full flow rate of the valve is provided as one of the parallel paths. A simple mechanical design using poppet valves and at least one cam is described.

公开(公告)号：US10578480B2

公开(公告)日：2020-03-03

申请号：US15957495

申请日：2018-04-19

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Shyh-Shiuh Lih ,  Hyeong Jae Lee ,  Mircea Badescu

IPC: G01F23/296

Abstract: A multi-probe system for real-time measurement of a fluid level in a pipe with steady-state and turbulent flow conditions is presented. The multi-probe system includes a plurality of multiplexed transducers attached in a non-destructive fashion to walls of the pipe. Multiplexing of the transducers activate and deactivate the transducers in sequence to generate independent pairs of transmit and receive wave signals through the pipe. Each transmit and receive signal pair can be used to independently establish a time-of-flight from the transducer and back to the transducer as reflected by a surface of the fluid. The transducers can be arranged as longitudinal and/or circumferential arrays on the walls of the pipe. An algorithm that determines the time-of-flight eliminates received signals having an energy level lower than or equal to a predefined minimum energy level and eliminates any time-of-flight that is shorter than a minimum threshold time.

公开(公告)号：US09418647B2

公开(公告)日：2016-08-16

申请号：US13913044

申请日：2013-06-07

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Eric D. Archer ,  Xiaoqi Bao ,  Stewart Sherrit

IPC: G10K11/18 ,  E21B47/14 ,  G10K11/34 ,  A61B8/00 ,  E21B47/18

CPC classification number: G10K11/18 ,  A61B8/4483 ,  A61B8/4488 ,  E21B47/14 ,  E21B47/18 ,  G10K11/34

Abstract: A plurality of phased array acoustic communication devices are used to communicate data along a tubulation, such as a well. The phased array acoustic communication devices employ phased arrays of acoustic transducers, such as piezoelectric transducers, to direct acoustic energy in desired directions along the tubulation. The system is controlled by a computer-based controller. Information, including data and commands, is communicated using digital signaling.

Abstract translation: 多个相控阵声学通信装置用于沿着诸如井的管道传送数据。 相控阵声学通信装置使用诸如压电换能器之类的声换能器的相控阵列，以沿着管道将理想的方向引导声能。 该系统由基于计算机的控制器控制。 使用数字信号传送包括数据和命令的信息。