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Fluid means for data transmission

  • US 4,932,005 A
  • Filed: 09/22/1988
  • Issued: 06/05/1990
  • Est. Priority Date: 01/04/1983
  • Status: Expired due to Fees
First Claim
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1. A method of measuring a change in the flow rate of fluid flowing within a drill string in an oil well to transmit information concerning changes in downhole conditions from the bottom of the well to the top of the drill string, the method comprising the steps of:

  • (a) entrapping a first fluid within a closed container being provided with an escape outlet which outlet restricts fluid flow of the first fluid from said container;

    (b) applying a pressure of constant magnitude to the entrapped first fluid;

    (c) adding a controlled volume of fluid to the entrapped first fluid at a flow rate and pressure equal to the flow rate and pressure of the first fluid that flows through said escape outlet; and

    (d) measuring changes in the flow rate of the first fluid added to the entrapped first fluid to thereby measure any changes in the flow rate of said entrapped first fluid flowing out of the escape outlet.

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